RU2574980C1 - Pull-on article for wearing and method of its manufacturing - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: pull-on article for wearing is designed, having a front part which is arranged to be worn around the front side of the wearer, a crotch part which is arranged to be worn along the crotch area of the wearer, and a rear part which is arranged to be worn around the back side of the wearer, and with the side edges of the front part and the side edges of the rear part are bonded to form a shape similar to briefs. And each of the front part and the rear part is formed by an outer covering element, in which the first sheet material and the second sheet material are joined by lamination, a plurality of pieces of the first sheet material is placed in the direction of the outer covering element corresponding to the direction of the body length, so that a plurality of pieces of the first sheet material are adjacent to each other and do not overlap each other, and the outer covering element has elasticity in the direction of enveloping the waist.

EFFECT: invention improvement.

16 cl, 15 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to a stretchable wearable product (such as underpants) and a method for its manufacture.

BACKGROUND OF THE INVENTION

As a stretchable wear article (such as underpants), a disposable diaper, a disposable underwear, and the like are known. As a conventional pull-on diaper, a pull-on diaper is known that comprises an outer covering member that can be worn around the front side and rear side of the wearer, and a crotch portion that is wearable along the crotch of the wearer and is located between the front side and the rear side of the outer a covering element, wherein the absorbent body is located on the crotch part (see, for example, patent literature 1 and 2).

The outer covering element has a two-layer structure formed of a material forming the inner layer and a material forming the outer layer, which are joined by lamination on almost all of their surfaces, and a sheet is used to form the outer covering element, in which the material forming the inner layer, and the material forming the outer layer is attached to each other so that between them is an elastic element. This sheet is divided into two in the width direction, and the absorbent body is placed so as to connect the divided parts of the sheet arranged in parallel, the outer edge parts of the materials forming the outer layer and forming the sheets are folded accordingly, and both edge parts of the absorbent body are fixed by means of bent parts . Subsequently, the absorbent body is bent near the central part, and the sheets are superimposed so that the material forming the inner layer is inside, and the sheets that are superimposed so that the absorbent body is placed between them are fastened in the width direction with the specified at intervals. After that, the central part of the bonded part is cut in the width direction of the sheets, and the cut off parts are separated. This completes the manufacture of a pull-on diaper containing an outer covering element formed by bonding sheets and an absorbent body attached to this outer covering element (see, for example, Patent Literature 1).

Another disclosed structure comprises integrally forming an outer covering sheet that provides coverage from a front element to a rear element; tape-like sheet bases extending in the transverse direction, a plurality of which are staggered in the longitudinal direction on the outer surface of the outer covering sheet, and an elastic tensile element located below the belt, which also serves as an elastic tensile element assembled in the assembly, which is located between the edge part of the overlapping parts of the tape-like sheet bases from the side of the belt and the outer covering sheet and is fixed by means of a hot-melt mortar glue or the like (see, for example, Patent Literature 3). Since each edge part from the perineum in the transverse direction CD (transverse direction perpendicular to the flow direction on the line) of the ribbon-like sheet substrates is placed so that it covers another ribbon-like sheet base located below it, the outer covering sheet as a whole has a two-layer structure containing at least an outer covering sheet and ribbon-like sheet substrates (the outer covering sheet has a three-layer structure in the part formed by the overlapping ribbon tape azny leaf bases). A method of manufacturing this involves continuously placing an elongated elastic tensile element between the outer covering sheet and the tape-like sheet substrates, and simultaneously attaching the elastic tensile element to the edge portions of the waist side of the tape-like sheet substrates by using hot-melt adhesive.

LIST OF LINKS

Patent Literature

Patent Literature 1: JP-A-2005-279077 (“JP-A” means Japanese Unexamined Published Patent Application)

Patent Literature 2: JP-T-2008-508082 (“JP-T” means Published, Examined Patent Publication)

Patent Literature 3: Japanese Patent No. 4659109

SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a stretchable wear article having a front portion that is adapted to be worn around the front side of the wearer, a crotch portion that is adapted to be worn along the crotch zone of the wearer, and a rear portion that is adapted to be worn around the back of the wearer, while the side edges of the front and the side edges of the back are bonded to form a panty like shape,

wherein

each of the front and rear parts is formed by an outer covering element, in which the first sheet material and the second sheet material are connected by lamination,

a plurality of pieces of the first sheet material are arranged in the direction of the outer covering member corresponding to the body length direction, so that the plurality of pieces of the first sheet material are adjacent to each other and do not overlap, and the outer covering member has elasticity in the direction of embracing the waist.

In addition, in accordance with the present invention, a method of manufacturing a stretchable product for wearing, including:

the step of preparing a plurality of ribbon-shaped pieces of the first sheet material, aligned so that the pieces are next to each other and do not overlap each other in the direction of their width;

the step of obtaining the outer covering element by laminating and simultaneously attaching a plurality of pieces of the first sheet material to the second sheet material while maintaining an aligned state of the plurality of pieces of the first sheet material;

the step of superimposing the front of the outer covering element, which should be placed on the front side of the carrier, and the rear part of the outer covering element, which should be placed on the rear side of the carrier on each other, and fastening the outer covering element at predetermined intervals; and

the step of cutting the outer covering element in the width direction to separate the individual pull-on diapers.

Other and additional aspects, features, and advantages of the invention will appear more fully from the description below, taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

{FIG. one}

FIG. 1 is a perspective view showing a preferred embodiment (first embodiment) of a stretchable wear article of the present invention.

{FIG. 2}

FIG. 2 is an exploded perspective view showing a preferred embodiment of a stretchable wear article of the present invention.

{FIG. 3}

FIG. 3 shows (1) a perspective view, (2) an enlarged sectional view of the main part, and (3) an enlarged plan view of the main part, which show a first example of a stretchable wear article.

{FIG. four}

FIG. 4 shows (1) a perspective view, (2) an enlarged sectional view of the main part, and (3) an enlarged plan view of the main part, which show a second example of a stretchable wear article.

{FIG. 5}

FIG. 5 shows (1) a perspective view, (2) an enlarged sectional view of the main part, and (3) an enlarged plan view of the main part, which show a third example of a stretchable wear article.

{FIG. 6}

FIG. 6 shows (1) a perspective view, (2) an enlarged sectional view of the main part, and (3) an enlarged plan view of the main part, which show a fourth example of a stretchable wear article.

{FIG. 7}

FIG. 7 is a perspective view showing a second embodiment of a stretchable wear article.

{FIG. 8}

FIG. 8 is a perspective view giving an overview of the manufacturing operations in accordance with a first variation of a preferred embodiment (first embodiment) of a method for manufacturing a stretchable wear article of the present invention.

{FIG. 9}

FIG. 9 shows (1) a plan view and (2) a front view, which schematically show the main part of the technological operations according to the first aspect.

{FIG. 10}

FIG. 10 shows a front view that schematically shows the main parts of the manufacturing operations in accordance with a second variation of the manufacturing method of the stretchable wearer of the present invention.

{FIG. eleven}

FIG. 11 shows a front view that schematically shows the main parts of the manufacturing operations in accordance with a third variation of the method for manufacturing the stretchable wear article of the present invention.

{FIG. 12}

FIG. 12 shows a front view that schematically shows the main parts of the manufacturing operations in accordance with a fourth variation of the manufacturing method of the stretchable wearer of the present invention.

{FIG. 13}

FIG. 13 shows a plan view giving an overview of the process steps in accordance with a fifth variation of a method for manufacturing a stretchable wear article of the present invention.

{FIG. fourteen}

FIG. 14 shows a plan view giving a general idea of a modified example of technological operations in accordance with the fifth variety.

{FIG. fifteen}

FIG. 15 shows a perspective view giving an overview of the process steps according to a preferred embodiment (second embodiment) of a method for manufacturing a stretchable wear article of the present invention.

DESCRIPTION OF EMBODIMENTS

The present invention relates to a stretchable wearable product in which elasticity similar to that of a conventional stretchable wearable product is maintained, and the ability to adhere to the wearer's body and the ability to repeat the wearer's body are retained, the number of assemblies increases due to the effect provided by the materials 33, forming the outer layer, are cut in the longitudinal direction, and the zone surrounding the waist is softer, and the air permeability in this zone can be increased shena, and steam saturation can be reduced. In addition, the present invention relates to a method for manufacturing a stretchable wearable product, which can provide a simple manufacture of a stretchable wearable product, in which the aforementioned elasticity, body fit, breathability, skin-covering ability and the like are improved.

A preferred embodiment (first embodiment) of the stretchable wearing article according to the present invention will be explained below with reference to FIG. 1 and FIG. 2.

In the stretchable wearable products 10 and 100, in this description, the direction of the stretchable wearable product corresponding to the direction of the body length is defined as the Y direction, and the transverse direction of the stretchable wearer is defined as the X direction, and is also called the “waist circumference direction”.

As shown in FIG. 1 and FIG. 2, the stretchable wear article 10 of this embodiment is, for example, a pull-on diaper and has a front portion 21 that is adapted to be worn around the front side of the wearer, a crotch portion 13 that is configured to be worn along the crotch zone of the wearer, and a back portion 23 that is adapted to be worn around the rear side of the carrier. This pull-on diaper 10 will be explained in detail hereinafter.

The stretchable diaper 10 is formed by an outer covering element 11, which forms the front part 21 and the rear part 23, and an absorbent body 40, which forms the crotch part 13.

The outer covering member 11 is formed in an annular shape by bonding one side edge 21A of the front portion 21 and one side edge 23A of the rear portion 23 and further bonding the other side edge 21B of the front portion 21 and one other side edge 23B of the rear portion 23. The outer covering element 11 has elasticity in the direction of the stretchable diaper 10 in which it covers / surrounds the waist.

In addition, the crotch portion 13 is formed by an absorbent body 40, which connects the front part 21 and the rear part 23 like a bridge and, therefore, is adapted to be worn along the wearer's crotch. The shape of the stretchable product (the shape of the underpants) is formed by an outer covering element 11 formed with an annular shape and an absorbent body 40, which forms a crotch portion 13 like a bridge.

The absorbent body 40, which forms the crotch portion, also extends to a location slightly lower than the waist opening 12 of the outer covering element 11, and is fixed to the outer covering element 11 in the front part 21 and the rear part 23. Moreover, in the zone surrounding the waist , the outer covering element 11 has a central zone on which the absorbent body 40 is fixed, and two side zones on which the absorbent body 40 is not fixed. The above expression “waist zone” refers to a zone extending almost from the upper edge of the waist hole 12 to that point below in the body length direction (Y direction) next to which the outer upper thigh will be.

The aforementioned outer covering element 11 is formed by connecting pieces of material 33 (pieces of a first sheet material) forming an outer layer and a material 31 (second sheet material) forming an inner layer by lamination. A plurality of pieces 33 of material forming the outer layer are arranged in a direction (Y direction) of the outer covering member 11 corresponding to the direction of the body. The pieces 33 of the material forming the outer layer are located next to each other so that adjacent pieces 33 of the material forming the outer layer do not overlap. In other words, the pieces 33 of the material forming the outer layer are arranged so that there are no gaps between them and they do not overlap. For example, pieces 33 of the material forming the outer layer are placed in a state created by cutting one sheet of material forming the outer layer in the longitudinal direction into a plurality of pieces. In FIG. 3 (2) the slots between the pieces 33 of the material forming the outer layer are shown by arrows. As used herein, the term “adjacent, adjacent” means a state in which the pieces 33 of the material forming the outer layer are aligned with each other in the absence of any gap between them, and the situation in which the material 31 forming the inner layer is visible through the pieces 33 of the material forming the outer layer when the elastic outer covering element 11 is in a constricted state, it is not considered as having a gap. Whether the pieces 33 of the material forming the outer layer overlap or are adjacent to each other is established by observation in a state corresponding to the placement of the individual materials when the stretchable wearer is in an expanded state similar to that shown in FIG. 3 (3), or when no retraction of the elastic member or the like is possible. When the length of the material 31 forming the inner layer and the lengths of the pieces 33 of the material forming the outer layer are identical when viewed in the direction (direction Y) of the body length in the multilayer zone in which the material 31 forming the inner layer of the outer covering element 11 and the pieces 33 of the material forming the outer layer of the outer covering element 11, are connected by lamination, this situation is defined as "located so that they are next to each other."

The multilayer zones in which the material 31 forming the inner layer and the pieces 33 of the material forming the outer layer are connected by lamination, have elasticity in the direction of the stretchable diaper 10, in which it covers the waist, that is, in the transverse direction (X direction). It is also preferred that each of the multilayer zones has an elastic member 35 between the material 31 forming the inner layer and the piece 33 of the material forming the outer layer. In such a case, each elastic member 35 is placed in its expanded state between the material 31 forming the inner layer and the piece 33 of the material forming the outer layer, and thus the multilayer zones have elasticity. Alternatively, as explained in detail below, both the material 31 forming the inner layer and the material 33 forming the outer layer or one of the material 31 forming the inner layer and the material 33 forming the outer layer can be formed from an elastic material .

As the sheet materials for the material 31 forming the inner layer and the material 33 forming the outer layer, for example, non-woven materials obtained by various manufacturing methods, such as non-woven material obtained by passing air through; non-woven material obtained by passing between heated rollers; hydro-entangled nonwoven fabric; non-woven material of a spunbond production method and non-woven fabric obtained by melt aerodynamic, woven materials, knitted materials, polymer films and the like, can be cited respectively as an example, and sheet materials formed by combining these materials into a single whole can also be used. through lamination, and the like.

In addition, in particular, the material 31 forming the inner layer is preferably formed from a nonwoven material for reasons related to increasing air permeability and improving texture and is preferably formed from a water-repellent nonwoven material for reasons related to preventing leakage of the released substances.

Next, the absorbent body 40 will be explained. As shown in FIG. 2, by way of example, the absorbent body 40 comprises a top sheet 41, a back sheet 42, and an liquid-retaining absorbent core 43 located between these sheets. This absorbent core 43 is covered by a covering sheet 44, which is bent at the locations of the dashed lines shown in the drawing, in the directions of the arrows. In addition, two side sheets 46 and 46, which form the internal three-dimensional assembly 45, are located on the side of the surface in contact with the skin. The aforementioned back sheet 42 and the sheet 47 for forming the inner seam are arranged in this order from the side of the surface not in contact with the skin.

A material that is commonly used for a diaper of this kind can be used for a given absorbent body 40, and this material is not particularly limited.

Preferably, the top sheet 41 is formed of a hydrophilic nonwoven material. As the hydrophilic non-woven material, non-woven materials called non-woven material obtained by passing air through; spot bonded non-woven fabric; spunbond nonwoven fabric; hydroentangling non-woven material and three-dimensional non-woven material in which their fibers are polypropylene elementary fibers, bicomponent fibers of polypropylene and polyethylene, bicomponent fibers of polyethylene terephthalate and polyethylene and the like that have been processed to impart hydrophilicity. Hydrophilic fibers, such as cellulose hydrate or the like, may be included in these materials. In addition, a sheet obtained by forming open pores on a polymer film can also be used as the top sheet 41. A composite / multilayer sheet formed by joining various types of the aforementioned nonwoven materials and a polymer film having open pores can be used.

The backsheet 42 is not particularly limited so long as it is waterproof. In addition, the back sheet 42 preferably has a moisture permeability. As a sheet having water resistance and moisture permeability, it is possible to use, for example, a porous film obtained by melting a hydrophobic thermoplastic resin and a finely divided inorganic filler containing calcium carbonate and the like, or an organic polymer that is not compatible, and the like, to form film and subjecting the film to uniaxial or biaxial stretching. Examples of thermoplastic resins may include polyolefins. Examples of polyolefins may include high to low density polyethylenes, linear low density polyethylenes, polypropylene, polybutene and the like, and these materials can be used alone or as mixtures. Various nonwovens can be used for sheet 47 for forming an internal seam to give a fabric-like appearance.

As the absorbent core 43, for example, absorbent cores that use a fiber bundle or a combination of a fiber bundle and an absorbent polymer, or the like, can be used. As fibers that form a collection of fibers, hydrophilic natural fibers, such as cellulosic fibers and cotton, and synthetic fibers (preferably fibers having hydrophilicity or processed to impart hydrophilicity), and the like, can be used. Although the surface density is not particularly limited, it is preferably 150 g / m ² or more and 500 g / m ² or less. In addition, thin paper (sanitary paper), such as hydrophilic sanitary paper, non-woven fabrics formed from hydrophilic fibers such as cotton and hydrated cellulose, non-woven fabrics formed by exposing synthetic polymers, can be used as cover sheet 44. fiber treatment to impart hydrophilicity (composite non-woven materials such as non-woven material with SMS structure (layer obtained by spunbond production method (S - spunbond), - a layer obtained by the aerodynamic method from a melt (M - meltblown), - a layer obtained by a spinneret method of production), a nonwoven material with the SMMS structure (a layer obtained by a spinneret method of production, - a layer obtained by an aerodynamic method from a melt, - a layer obtained by aerodynamic by a melt method, - a layer obtained by a spinneret production method) and a non-woven material with an SSMS structure (a layer obtained by a spinneret production method, - a layer obtained by a spinneret production method, - a layer obtained by aerodynamic by a melt method, a layer obtained by a spinneret production method), and the like.

As the side sheet 46, it is preferable to use a water-repellent non-woven material, and in particular, non-woven material of a spinneret production method, a non-woven material with a structure SM (a layer obtained by a spunbond method of production, a layer obtained by an aerodynamic method from a melt), a non-woven material with a structure are used SMS (a layer obtained by a spinneret production method, a layer obtained by an aerodynamic method from a melt, a layer obtained by a spinneret production method) and the like.

In the pull-on diaper 10 of this embodiment, the number of assemblies increases due to the effect provided by the fact that the material 33 forming the outer layer is divided into many pieces and the area surrounding the waist becomes softer. In addition, a plurality of pieces 33 of the material forming the outer layer are arranged in the direction of the outer covering member 11 corresponding to the body length direction, and pieces of 33 and 33 of the material forming the outer layer are adjacent to each other so that adjacent pieces 33 of the material forming outer layer, do not overlap. In this way, air permeability in the part between the pieces 33 of the material forming the outer layer can be ensured, while maintaining elasticity similar to that of a conventional pull-on diaper, and maintaining the ability to adhere to the body and the ability to repeat body movements. Therefore, steam saturation can be reduced. In addition, the outer covering element 11 has a two-layer structure formed of material 31 forming the inner layer and material 33 forming the outer layer, and these materials are located next to each other. Accordingly, it is hardly possible to see the skin through it, and the ability to close the skin can be improved.

Next, examples of arrangement of pieces 33 of material forming the outer layer, material 31 forming the inner layer, and elastic elements 35 for the aforementioned preferred embodiment will be explained. First, a first example of the pull-on diaper 10 of the first embodiment will be explained, and for the remaining examples and the second embodiment mentioned below, different points will be explained. Those features that are not specifically explained are the same as in the first embodiment and in the first example, and the written explanations apply to them accordingly. In addition, the same reference numerals are provided for the same materials and components.

A first example of a pull-on diaper 10 will be explained using FIG. 3. As shown in FIG. 3, the pull-on diaper 10 (10A) according to the first example has a structure in which a plurality of pieces 33 of the material forming the outer layer are attached to the material 31 forming the inner layer by elastic elements 35 located between the pieces 33 of the material forming the outer layer, and material 31, forming the inner layer, using an adhesive such as hot-melt adhesive without adhesive (not shown), so that pieces 33 of the material forming the outer layer are adjacent to each other in the direction (Y direction) is stretched a diaper 10 corresponding to the direction of body length in the aforementioned pull-on diaper 10 of the first embodiment. The elastic elements 35 in their stretched state are attached to the pieces 33 of the material forming the outer layer, and to the material 31 forming the inner layer. Although the pull-on diaper 10 has pieces 33 of material forming the outer layer in an amount the same as the number of attached elastic elements 35, a plurality of elastic elements 35 can be placed on one piece 33 of material forming the outer layer. Meanwhile, FIG. 3 (2) shows a state in which the material 31 forming the inner layer is folded to the side of the surface in contact with the skin so as to close the part (not shown) to which the absorbent body 40 is attached. In addition, the part shown by the arrow for the material 33, forming the outer layer, shows the place where the pieces 33 and 33 of the material forming the outer layer are located next to each other, and the pieces 33 and 33 of the material forming the outer layer are separated from each other.

In the central zone of the outer covering element 11, on which the absorbent body 40 is fixed, the elastic elements 35 are cut at a plurality of points, and thus the multilayer zones formed from the material 31 forming the inner layer and the material 33 forming the outer layer, in this the central zone does not have significant elasticity.

The width of the individual pieces 33 of the material forming the outer layer is selected accordingly. For example, the width of the individual pieces 33 of the material forming the outer layer is preferably approximately the same as the width of the elastic element 35 or greater than the width of the elastic element 35. For example, for a pull-on diaper intended for children, the width of the individual pieces 33 of material forming the outer layer is 1 mm or more, preferably 3 mm or more and more preferably 5 mm or more and 60 mm or less, preferably 40 mm or less and more preferably 30 mm or less, in particular 1 mm or more and 60 mm silt and less, preferably 3 mm or more and 40 mm or less, and more preferably 5 mm or more and 30 mm or less. The fastening interval between the pieces 33 of the material forming the outer layer is set to 0 mm in a state in which the pieces 33 of the material forming the outer layer are expanded / straightened. That is, the pieces 33 of the material forming the outer layer are arranged in a state in which there is no gap between the pieces of material 33 forming the outer layer, and the pieces 33 and 33 of the material forming the outer layer do not overlap. When the width and the intervals when attaching the pieces 33 of the material forming the outer layer are set as mentioned above, the wearing comfort of the stretchable diaper 10 is further enhanced. In addition, providing the width of the individual pieces 33 of the material forming the outer layer at a predetermined width allows evenly to distribute the load applied to the body by tightening the elastic elements, and at the same time creates the effect of improving the aesthetic impression of the appearance (the aesthetic impression provided regularity).

The elastic elements 35 are attached to pieces 33 of material forming the outer layer and to material 31 forming the inner layer, in their stretched state, partially in the width direction (Y direction) of each piece 33 of material forming the outer layer. Thus, the pieces 33 of the material forming the outer layer and the material 31 forming the inner layer will be bonded. More precisely, as shown in FIG. 3 (3), the elastic member 35 is fixed in a portion central in the width direction (Y direction) of each piece 33 of material forming the outer layer, and a piece 33 of material forming the outer layer is attached to the material 31 forming the inner layer in the part, central in the direction of its width. Since the parts end in the width direction (the parts end in the diaper direction corresponding to the body length direction) of the pieces 33 of the material forming the outer layer are free ends, when the load applied to stretch the elastic elements 35 is removed, the pieces 33 of the material forming the outer layer, are contracted due to the tightening of the elastic elements and form assemblies (not shown). As a result, this creates the effect of increasing softness and at the same time serves to create an attractive appearance of the diaper as a whole. In addition, the location of the attachment zone of each of the pieces 33 of the material forming the outer layer to the material 31 forming the inner layer is not limited to that part of the piece 33 of the material forming the outer layer that is central in the width direction (Y direction), and may be offset to either side in the width direction. Namely, in the width direction of the piece 33 of the material forming the outer layer, the distance from the attachment point to the material 31 forming the inner layer to one edge can be long, and the distance to the other edge can be short. When changing the distances from the attachment point to the edges in this way, assemblies are more easily formed on the side corresponding to the longer distance. Due to this, assemblies can be formed that create a different aesthetic impression, and softness can be enhanced by large assemblies.

In addition, the side seam portions 25 are portions in which the side edges of the front portion 21 of the outer covering element 11 and the side edges of the rear portion 23 of the outer covering element 11 are respectively fastened by means of a sealed connection, for example by embossing. For example, the inner layer material 31 (31A) of the front 21 and the inner layer material 31 (31B) of the rear 23 are fastened together in a state in which the pieces 33 (33A) of the material forming the outer layer in the front 21 and the pieces 33 (33B) of the material forming the outer layer in the rear portion 23, are placed in the direction (direction Y) of the body length. Therefore, in parts 25, which are side seams, elastic elements 35 (35A) located on the front part 21, and elastic elements 35 (35B) located on the rear part 23, are in a state in which they will be placed in the direction ( direction Y) of the length of the body by means of materials 31 forming the inner layer.

This structure can also be applied for an example in which elastic elements 35, explained later, are used, and for the second embodiment. In addition, this structure, with the exception of the elastic elements 35, can also be applied for the example explained later, in which the elastic elements 35 are not used.

As the materials used as the material 31 forming the inner layer and the material 33 forming the outer layer, sheets explained for the aforementioned first embodiment can be used. The elastic elements 35 may be any of the elastic materials commonly used in absorbent articles, such as diapers and sanitary napkins. Examples of such elastic materials include synthetic rubbers such as styrene butadiene rubber, butadiene rubber, isoprene rubber and neoprene rubber; natural rubber, ethylene vinyl acetate copolymer, flexible polyolefins and polyurethane. Forms of elastic elements preferably include a thread or a narrow strip (flat elastic band) with a rectangular, square, round or polygonal section, or a complex thread.

In the case of the first example of the pull-on diaper 10A, the effects mentioned for the pull-on diaper 10 of the first embodiment can be obtained. In addition, the outer covering element 11 is given elasticity in multilayer zones formed from pieces 33 of material forming the outer layer and material 31 forming the inner layer, in which the elastic elements 35 are placed. This elasticity improves the ability of the stretched diaper to fit against the body. Since those parts of the pieces 33 of the material forming the outer layer that are end in the width direction (the parts end in the diaper direction corresponding to the direction of the body length) are free ends, when unloading is intended to stretch the elastic elements 35, the pieces 33 of material forming the outer layer, are contracted due to the tightening of the elastic elements with the formation of assemblies (not shown). Therefore, it is possible to provide a more attractive appearance of the diaper as a whole. In addition, since the elastic elements 35 are covered by pieces of material 33 forming the outer layer, the elastic elements 35 are protected by pieces of 33 material forming the outer layer. This prevents the application of external force directly to the pieces 33 of the material forming the outer layer, and thus, it will be difficult to cut the elastic elements 35.

In addition, the colored sheets or printed sheets can be used as the material 33 forming the outer layer. When using such sheets, it becomes possible to obtain a pull-on diaper 10, which has an excellent design.

In addition, for the first example shown in FIG. 3, a structure is shown in which the material 33 forming the outer layer is formed in the form of a plurality of pieces of material forming the outer layer and the pieces 33 of material forming the outer layer (pieces of the first sheet material) are glued next to each other to the material 31 forming the inner layer and constituting the second sheet material, by means of the elastic element 35. However, a structure can be formed in which, on the contrary, the material 31 forming the inner layer is formed in the form of a plurality of pieces of the first sheet material ala, and longitudinally sharp pieces 31 of the material forming the inner layer are attached next to each other to the material 33 forming the outer layer and constituting the second sheet material, by means of elastic elements 35 by using, for example, hot-melt adhesive. In this case, the number of assemblies increases due to the effect provided by the fact that the material 31 forming the inner layer is divided into many pieces, resulting in a softer part from the side of the body. In addition, a plurality of pieces 31 of the material forming the inner layer can be arranged in the direction of the outer covering element 11 corresponding to the direction of the body length, and pieces 31 and 31 of the material forming the inner layer can be arranged so that the materials 31 and 31 will be arranged next to each other and will not overlap each other. In this case, air permeability can be ensured in the part between the pieces 31 of the material forming the inner layer, while maintaining elasticity, which is similar to the elasticity of a conventional pull-on diaper, and maintaining the ability to adhere to the body and the ability to repeat body movements. Therefore, steam saturation can be reduced. In addition, the outer covering element 11 has a two-layer structure formed of material 31 forming the inner layer and material 33 forming the outer layer, and the materials are placed next to each other. Accordingly, it is hardly possible to see the skin through it, and the ability to close the skin can be improved.

In addition, the material 33 forming the outer layer and located on the front side may be a plurality of pieces of the first sheet material, and the material 31 forming the inner layer and located on the rear side may be a plurality of pieces of the second sheet material. On the contrary, the material 31 forming the inner layer and located on the front side may be a plurality of pieces of the first sheet material, and the material 33 forming the outer layer and located on the rear side may be a plurality of pieces of the second sheet material.

Next, a second example of the pull-on diaper 10 will be explained using FIG. 4. As shown in FIG. 4, the pull-on diaper 10 (10B) of the second example is formed so that, as in the aforementioned pull-on diaper 10 of the first embodiment, the plurality of pieces 33 of the material forming the outer layer (pieces of the first sheet material) are arranged in the direction of the outer covering member 11 corresponding to the direction of the length of the body, using elastic elements 35, and pieces 33 and 33 of the material forming the outer layer are arranged so that the materials 33 and 33 will be located next to each other and will not overlap friend is the same as in the first example. The pull-on diaper 10 (10B) according to the second example has a structure in which pieces 33 of the material forming the outer layer are attached to the material 31 forming the inner layer by means of hermetically connected parts 37. Thus, the structure and width of the pieces 33 of the material forming the outer layer correspond to the first example. In addition, the pieces 33 of the material forming the outer layer are divided in parts shown by arrows.

In this structure, the individual elastic elements 35 are in a stretched state, and both ends thereof are attached to the respective pieces 33 of the material forming the outer layer and to the material 31 forming the inner layer by attaching by adhesive 39 to thereby give elasticity to the entire outer the covering element 11. Each elastic element 35 is not attached to the piece 33 of the material forming the outer layer, and to the material 31 forming the inner layer in areas different from both ends of the elastic element enta 35. Consequently, good elasticity can be achieved in multilayer zones formed from pieces 33 of material forming the outer layer and material 31 forming the inner layer without interfering with the elasticity of the elastic elements 35. In the central zone of the outer covering element 11, which the absorbent body 40 is fixed to, multilayer zones formed from pieces 33 of material forming the outer layer and material 31 forming the inner layer have elasticity.

In addition, in this structure, a plurality of hermetically connected parts 37 are arranged regularly in each of the parts in which the material 31 forming the inner layer and the piece 33 of the material forming the outer layer form a two-layer structure with an elastic element 35 located between them. Thus, the elastic elements 35, which are not attached to the pieces 33 of the material forming the outer layer, or to the material 31 forming the inner layer, by means of adhesive 39 in a part other than both ends, can hardly be displaced in the direction of the body length ( direction Y), and elastic elements 35 can simultaneously provide for the formation of assemblies. Assemblies are formed between the hermetically connected parts 37 adjacent in the X direction and are formed in each of the material 33 forming the outer layer and the material 31 forming the inner layer. In this second example, air permeability is increased because gaps that allow ventilation in the body length direction (Y direction) in parts between pieces 33 of material forming the outer layer and material 31 forming the inner layer are formed by assemblies. In addition, the assemblies give the impression that the products are made with some design. Meanwhile, the hermetically sealed parts 37 need not be arranged as regularly as in the structure shown in FIG. 4. Furthermore, as the structure shown in FIG. 4, a structure may be selected in which the locations of the sealed parts 37 are offset for each piece 33 of material forming the outer layer. In this case, the places in which the assemblies are formed will be displaced, and therefore, air will easily pass into the space between the material 31 forming the inner layer and the material 33 forming the outer layer, and the air permeability is further increased.

In the pull-on diaper 10 (10B) of the second example, effects similar to those of the pull-on diaper 10 of the aforementioned first embodiment can be obtained. At the same time, the hermetically connected parts 37 are formed at intervals in the side portions of the material 33 forming the outer layer in the direction of embracing the waist, and pieces 33 of the material forming the outer layer are attached to the material 31 forming the inner layer. Thus, pieces 33 of the material forming the outer layer form assemblies. Therefore, in the “raised” parts of the assemblies, air permeability is also provided in the width direction (arrow direction Y in the drawing) of pieces of material 33 forming the outer layer, between pieces of material 33 forming the outer layer and material 31 forming the inner layer. Consequently, air permeability can also be provided in portions of the material 31 forming the inner layer, on which there are pieces 33 of material forming the outer layer. Accordingly, a stretchable diaper 10 (10B) can be obtained that does not lose its softness, has excellent elasticity, has good breathability and for which it is very difficult to create a state in which it will be saturated with steam, despite the fact that the outer covering element 11 has multilayer zones.

A third example of a pull-on diaper 10 will be explained using FIG. 5. As shown in FIG. 5, the pull-on diaper 10 (10C) according to the third example has a structure in which the pieces 33 of the material forming the outer layer themselves have elasticity in the longitudinal direction (the direction of the waist), and these pieces 33 of the material forming the outer layer are attached to the material 31 forming the inner layer in their expanded state by adhesive 32 in the pull-on diaper 10 of the aforementioned first embodiment. As the adhesive, for example, hot-melt adhesive, adhesive, double-sided adhesive tape and the like can be used.

The elasticity possessed by the pieces 33 of the material forming the outer layer themselves, as used herein, refers, for example, to elasticity, which can replace the elasticity imparted by the aforementioned elastic elements.

As the material 33 forming the outer layer and having elasticity, elastic sheets, such as nonwoven materials containing elastic fibers and elastic films, can be used. In the case where the texture and appearance similar to the fabric should be accented, it is preferable that these elastic sheets have a layer of fibers on the surface. In the case where this layer of fibers is not elastic, the possibility of stretching the layer of fibers is provided by processing to give extensibility or the like so that the inelastic layer of fibers does not interfere with the manifestation of the elasticity of the elastic sheet. As an example of a treatment for imparting extensibility, for example, processing using teeth and depressions to partially cut the joints between the fibers or elongation of the fibers in the fiber layer, and thereby elasticity will be manifested without interfering with the elasticity of the elastic sheet. By treating the surface of the fiber layer using teeth and troughs, as shown in FIG. 6 (3), concavities and bulges (concavities are grooves 34) are formed on the surfaces of pieces 33 of material forming the outer layer.

The intervals between the above-mentioned grooves 34 are set, for example, in the form of equal intervals. In addition, in the case where the degree of elasticity is changed in each place, there is also the possibility of changing the intervals between the grooves 34. For example, in the case where the thickness of the material 33 forming the outer layer is 0.01 mm or more and 0, 2 mm or less in the zone in which greater elasticity is desired, the intervals between the grooves 34 are set equal to approximately 2 mm or more and 5 mm or less, and in the zone in which the small elasticity is desired, the intervals between the grooves 34 are set to approximately 0.5 mm or more and 2 mm or less. The intervals between the grooves 34 also vary depending on the thickness of the material 33 forming the outer layer. The method of processing the material 33 forming the outer layer is not limited, provided that the material forming the outer layer has a predetermined elasticity due to the grooves 34.

In addition, the width of the individual pieces 33 of the material forming the outer layer corresponds to the first example. In the drawing (2), the material 33 forming the outer layer is divided in parts indicated by arrows.

In addition, processing using teeth and depressions as a treatment for giving extensibility is also performed on the piece 33 of the material forming the outer layer, on the absorbent body 40. After processing to give the extensibility, the pieces 33 of the material forming the outer layer are pulled and attached to the material 31 forming the inner layer. After the pieces 33 of the material forming the outer layer and the material 31 forming the inner layer are attached, they are heat-sealed (elastic elements are cut) in the corresponding parts on the absorbent body 40, so that the pieces 33 of the material forming the outer layer are non-elastic and they lose their the elasticity in the respective parts, and the protrusions and depressions formed on the materials 33 forming the outer layer on the absorbent body 40 become less prominent.

As the aforementioned material forming the outer layer and having elasticity, for example, (1) a sheet containing a layer of elastic fibers and a layer (s) of stretchable fibers that (s) are combined with one surface or both are used the surfaces of the layer of elastic fibers; (2) a sheet containing a mesh elastic sheet and a layer (s) of tensile fibers, which (s) are combined (s) in one piece with one surface or both surfaces of the elastic sheet; (3) a sheet comprising an elastic sheet formed from an elastic film and a layer (s) of tensile fibers that (s) are combined with one surface or both surfaces of the elastic sheet; (4) an elastic sheet in which a plurality of elastic filaments, arranged to ensure their extensibility in one direction without intersecting them with each other in an unstretched state, are attached to the stretchable nonwoven material along their entire length.

As an example of a sheet of the aforementioned type (1), there can be cited, for example, (a) an elastic nonwoven material in which a layer of inelastic fibers is located on at least one surface of a layer of elastic fibers, while both of these fiber layers are bonded over the entire surface by thermofusion bonding at the “intersection” points of the fibers in a state in which the fibers forming the layer of elastic fibers retain the shape of the fibers, and the nonwoven material is or in a state in which part of the fibers forming the inelastic layer fibers, penetrated into the layer of elastic fibers, or in a state in which part of the fibers forming the layer of elastic fibers penetrated into the layer of inelastic fibers, or in both states. In addition, as sheets of the above types (1) to (3), you can use (b) an elastic sheet, which is obtained by stretching a laminate having an elastic layer having the ability to resiliently stretch, and a layer of inelastic fibers having inelasticity, while these layers superimposed on each other in the direction of their thickness and partially bonded, and the like. As a means for these stretchings and for obtaining tensile layers of fibers and nonwoven materials of the above types (1) to (3), it is preferable to perform the above processing using teeth and depressions.

In the elastic nonwoven fabric of the aforementioned type (a) on the interface between the layer of elastic fibers and the layer of inelastic fibers and near it, the “intersection” of the fibers forming the layer of elastic fibers and the fibers forming the layer of inelastic fibers are bonded by heat fusion, and thus the layers are evenly bonded over the entire surface. Since these two layers are bonded over the entire surface, the formation of spaces caused by the separation of the two layers is prevented, and an elastic non-woven material having a multilayer structure is formed, which creates the feeling of one element similar to a non-woven material formed from one layer. The aforementioned condition in which the fibers forming the layer of elastic fibers retain the shape of the fibers refers to a state in which most of the fibers forming the layer of elastic fibers are not deformed to the shape of the film or to the structure of the film containing the fibers, even in the case of heat application pressure or the like. In addition, in the layer of elastic fibers, the places of “intersection” of the fibers that form it are bonded by heat fusion in this layer. Similarly, also in the layer of inelastic fibers, the places of “intersection” of the fibers that form it are bonded by heat fusion in this layer.

In the case where the layers of inelastic fibers are located on both surfaces of the layer of elastic fibers, at least any one of the two surfaces is in a state in which part of the fibers forming it penetrated into the layer of elastic fibers, or in a state in which part fibers forming a layer of elastic fibers penetrated into at least one of the layers of inelastic fibers, or in both states.

The layer of elastic fibers has such properties that it can be stretched, and has the ability to tighten when removing the load that causes stretching. In addition, it is a collection of fibers with elasticity. In addition, the layer of elastic fibers may take the form of a canvas or non-woven material formed from fibers having elasticity. For example, it may be a non-woven material formed by a blow-molding process of a fiber, a spun process of forming a fiber, an aerodynamic process of forming a fiber from a melt, or the like. Particularly preferred canvas obtained by the process of forming fibers from the blowing. As the fibers forming the layer of elastic fibers, for example, fibers obtained from such starting materials as thermoplastic elastomers and rubbers can be used. In particular, fibers obtained from thermoplastic elastomers as starting materials are preferred for extensible non-woven material in an embodiment comprising a non-woven material obtained by passing air through and through as the base, since it is possible to form the fibers from the melt using an extruder in the same way as in the case of conventional thermoplastic resins, and fibers obtained in this way are easily amenable to fusion bonding. Examples of thermoplastic elastomers may include styrene-based elastomers such as SBS (a block alternating styrene-butylene block copolymer), SIS (a block alternating styrene-isoprene block copolymer), SEBS (a styrene-ethylene / butylene block copolymer with alternating blocks) and SEPS (block copolymer of styrene and ethylene / propylene with alternating blocks), olefin-based elastomers, polyester-based elastomers and polyurethane-based elastomers. These types of materials can be used only one at a time or as a combination of two or more types.

The layer of inelastic fibers is extensible, but is essentially inelastic. The extensibility in the sense used in this document can be either extensibility in the case when the forming fibers themselves are elongated, and extensibility in the case when the forming fibers themselves are not elongated, but the fiber layer as a whole lengthens due to the separation of fibers that are fused together at the intersection "Fibers, a structural change in a three-dimensional structure formed from a plurality of pieces of fibers by bonding the fibers by heat fusion, and the like, or breaking the forming fibers. Examples of fibers that form a layer of inelastic fibers can include fibers formed from polyethylene (PE), polypropylene (PP), polyesters (polyethylene terephthalate (PET) and polybutylene terephthalate (PBT)), polyamides and the like. The fibers that form the layer of inelastic fibers can be either short fibers or long fibers and can be either hydrophilic or water repellent. In addition, bicomponent fibers such as bicomponent fibers with a core and cladding or bicomponent fibers with side-by-side arrangement of components, splittable fibers, fibers with a modified surface profile in cross section, crimped fibers, heat-shrinkable fibers, and the like can also be used. These types of fibers can be used only one at a time or as a combination of two or more types. The inelastic fiber layer may be a canvas or nonwoven fabric of continuous elementary fibers or short fibers.

An elastic sheet of the aforementioned type (b) is obtained by performing an extensibility treatment on a multilayer sheet containing an elastic layer having elastic extensibility and a layer (s) of inelastic fibers that (s) are applied to one surface or both surfaces elastic layer and is connected (s) with it / them by lamination, while the layer (s) of inelastic fibers are partially bonded (s) with an adjustable bonding pattern.

The effects of the pull-on diaper 10 (10C) of the third example are the same as those of the pull-on diaper 10 of the aforementioned first embodiment. Since in this example, the pieces 33 of the material forming the outer layer are processed to give extensibility so that they have concavities and convexities, and no elastic elements are required located between the material 31 forming the inner layer and the pieces 33 of the material forming the outer layer, the appearance of a soft-touch product is created, and assemblies can also be formed on pieces 33 of the material forming the outer layer, due to the smaller width of the zone of application of adhesive 32 compared to the width of individual pieces in 33 material forming the outer layer. In addition, the amount of materials for forming elastic elements can be reduced.

In addition, by reducing the width of the individual pieces 33 of the material forming the outer layer, the elastic force can also be changed and can be adjusted to provide the proper pulling pressure corresponding to each place, such as the waist part, the part placed over the ilium, and lumbar part. For example, when performing the width of the waist part and the width of the part placed over the ilium, greater than the width of the remaining places, the elastic force can be increased and the pressure when tightened can be increased.

In the pull-on diaper 10 of the third example, in the case where the elasticity of the multilayer zones is small, the elastic elements 35 of the first example, if necessary, can be placed between the respective pieces 33 of the material forming the outer layer and the material 31 forming the inner layer.

A fourth example of a pull-on diaper 10 will be explained using FIG. 6. In a fourth example of the pull-on diaper 10 (10D), materials similar to those in the pull-on diaper 10A of the aforementioned first example are used in the pull-on diaper 10 of the aforementioned first embodiment. In the pull-on diaper 10 (10D) of the fourth example, the outer covering member 11 is subjected to a treatment to impart extensibility. In particular, in the pull-on diaper 10 of the aforementioned first example, as shown in FIG. 6, pieces 33 of the material forming the outer layer and the material 31 forming the inner layer, which are bonded by adhesive, such as hot-melt adhesive without adhesive (not shown), by elastic elements 35, were subjected to a tensile treatment (such as a tooth treatment) and troughs) in the direction of embracing the waist (X direction). Due to this, the pieces 33 of the material forming the outer layer and the material 31 forming the inner layer exhibit extensibility. The elastic elements 35 are fixed on the pieces 33 of the material forming the outer layer and on the material 31 forming the inner layer in their stretched state. As mentioned above, the processing method for giving extensibility is not limited, provided that it is a method that provides extensibility to the pieces 33 of the material forming the outer layer and the material 31 forming the inner layer.

In addition, the width of the individual pieces 33 of the material forming the outer layer corresponds to the aforementioned first example. Meanwhile, in the drawing (2), the material 33 forming the outer layer is divided in parts indicated by arrows.

For the fourth example of the pull-on diaper 10 (10D), effects similar to those of the pull-on diaper 10A of the aforementioned first example can be obtained. In addition, when processing using teeth and depressions as a treatment for imparting extensibility, the material 33 forming the outer layer and the material 31 forming the inner layer can be made extensible. Due to this, elasticity is manifested, and there is no obstacle to the manifestation of elasticity of the elastic elements 35, and therefore, the fit of the stretchable diaper 10D can be improved.

Next, a second embodiment of the pull-on diaper of the present invention will be explained with reference to FIG. 7.

As shown in FIG. 7, the pull-on diaper 100 as an example of the pull-on diaper has a structure in which the outer covering member 11 is also formed on the crotch portion 13, and the absorbent body 40 is located inside (on the surface contacting the skin) of the outer covering member 11 formed on the crotch part 13. In particular, the pull-on diaper 100 has a crotch portion 13, which is formed so that it connects the front part 21 and the rear part 23 in the outer covering element 11 provided in the above the opened first embodiment, like a continuous bridge. The material 31 forming the inner layer is provided in the rear part 23, the front part 21 and the crotch part 13 of the aforementioned outer covering element 11, and the material 33 forming the outer layer is superimposed on the material 31 forming the inner layer in the back part 23 and in the front part 21 along the direction of embracing the waist (X direction) and connected to it by lamination. A plurality of pieces 33 of the material forming the outer layer are arranged in the direction of the outer covering member 11 corresponding to the body length direction, and there is no gap between the pieces 33 of the material forming the outer layer, and the pieces 33 and 33 of the material forming the outer layer are relative to each other so that they are next to each other. In addition, multilayer zones in which the material 31 forming the inner layer and the material 33 forming the outer layer are connected by lamination, have elasticity in the direction of the outer covering element 11, which is the direction of the waist.

As mentioned above, the structure of the outer layer forming material 33 according to the present invention can also be applied to the pull-on diaper 100 having an outer covering element that is formed as continuous from the front side to the back side and extending through the crotch portion. In addition, the pull-on diaper 100 can provide an effect when used similar to that when using the first example of the first embodiment.

In addition, the first sheet material can be used as the material 31 forming the inner layer. In addition, the crotch portion 13 from the rear side can be formed only from material 33 forming the outer layer, or can be formed from material 33 forming the outer layer and material 31 forming the inner layer. In this case, a plurality of pieces 33 of material forming the outer layer, or pieces 31 of material forming the inner layer, can be arranged in the direction of the body length.

In each example explained above, the material 31 forming the inner layer is bent inward from the belt (see bent sections of the material 31 forming the inner layer, similar to those shown in Fig. 2). To this end, a sheet wider compared to the material 33 forming the outer layer is used for the material 31 forming the inner layer. In addition, by bending the material 31 forming the inner layer into the inside, leakage of urine, an absorbing polymer or the like can be further prevented. In addition, instead of the material 31 forming the inner layer, the material 33 forming the outer layer can be bent inward; both the material 31 forming the inner layer and the material 33 forming the outer layer can be bent, or instead of bending, the end portion of the absorbent body 40 can be covered with a separate sheet.

A first variation of a preferred embodiment (first embodiment) of a method for manufacturing the pull-on diaper of the present invention will be explained below with reference to FIG. 8-9. A first variation of the manufacturing method is the preferred manufacturing method of the aforementioned stretchable diaper 10 (10A). For features that are not explained in detail for the remaining varieties mentioned below, respectively, the explanations that are given in detail with respect to the first variety are applicable.

A method of manufacturing a pull-on diaper 10 includes the step of preparing a plurality of ribbon-shaped pieces 1S of the first sheet material aligned so that the pieces 1S are adjacent to each other and do not overlap in the direction of their width; the step of obtaining the outer covering element by laminating and simultaneously bonding the plurality of pieces 1S of the first sheet material to the second sheet material 2S while maintaining the aligned state of the plurality of pieces 1S of the first sheet material; the step of superimposing the front portion 21 of the outer covering element, which should be placed on the front side of the carrier, and the rear portion 23 of the outer covering element, which should be placed on the rear side of the carrier, on each other and fastening the outer covering element at predetermined intervals; and a step of cutting the outer covering member in the width direction to separate the individual pull-on diapers 10.

More precisely, as shown in FIG. 8 and FIG. 9, for example, the first sheet material 1S is fed from the upper side, the second sheet material 2S is fed from the lower side, and the continuous element 3S, designed to form elastic elements, which becomes elastic elements 35, is fed into the gap between the first sheet material 1S and the second sheet 2S material. The first sheet material 1S and the second sheet material 2S are continuous elements in this process step. Pieces 33 of material forming the outer layer are formed from the first sheet material 1S, and material 31 forming the inner layer is formed from the second sheet material 2S. For the data of the first sheet material 1S (material 33 forming the outer layer), the second sheet material 2S (material 31 forming the inner layer) and the continuous element 3S for forming elastic elements (elastic element 35), the same materials are used as those which are respectively mentioned above for the pull-on diaper 10. Meanwhile, with reference to the plurality of pieces of sheet material that are adjacent to each other in the direction of the outer covering member, corresponding to the direction of the body length, for the formation of the material 33 forming the outer layer (or material 31 forming the inner layer) in the stretchable product to be worn, it should be noted that the sheet material (sheet material before longitudinal cutting) is a continuous element in this technological operation , and ribbon-shaped sheet materials obtained by longitudinal cutting — all are named the first sheet material. In addition, with respect to the second sheet material that is superimposed on the first sheet material and connected to it by lamination to form an outer covering element, it should be noted that the sheet material, which is a continuous element in this process step, is also called the second sheet material in the same way .

First, the aforementioned first sheet material 1S is divided into a plurality of pieces in the width direction by means of a slitting device 211 for slitting the material forming the outer layer, thereby obtaining narrow ribbon-like sheet materials 33T. A take-up roller 212 is disposed at a location opposite to the aforementioned slitting device 211, wherein the first sheet material 1S is located between the slitting device 211 and the take-up roller 212. The slitting device 211 for the material forming the outer layer is shaped roller and has many knives (not shown) along the circumferential direction of the cutting device 211 located in the axial direction of the cutting device 211. I move the ribbon-like sheet materials 33T tear to the gap between the pickup / pulling rollers 217 and 218 in a state where they are wound around the pickup / pulling roller 217, while maintaining the divided state of the first sheet material 1S, in which there is no gap between the tape-shaped sheet materials 33T and 33T next to each other and do not overlap each other.

Alternatively, the first sheet material 1S is cut by means of a slitting device to produce a plurality of pieces of tape-like sheet materials 33T, and then instead of winding the cut material around the pick / pull roller 217, materials 33T can be fed directly into the gap between the pick / pull rollers 217 and 218 .

In addition, as shown in FIG. 8 and FIG. 9, a plurality of pieces of continuous elements 3S for forming elastic elements are prepared in parallel and fed into the gap between the pick-up / pull rollers 217 and 218 together with the second sheet material 2S in a state in which the respective continuous elements for forming elastic elements are stretched and the adhesive (not shown) supplied by the adhesive coating apparatus 215 is applied to them. Corresponding continuous elements 3S for forming elastic elements are supplied at predetermined intervals d1. In this case, it is preferable that they are fed so that the center of the continuous element 3S for forming elastic elements, defined in the direction of its width, is located in the center of the aforementioned tape-shaped sheet material 33T, determined in the direction of its width. As the aforementioned adhesive coating device 215, for example, a hot-melt adhesive gun is used, in which case a hot-melt solvent-free adhesive is used as an adhesive.

In this case, the continuous elements 3S, intended for the formation of elastic elements, are fed at predetermined intervals d1 into the gap between the gripping / pulling rollers 217 and 218 in their extended state on the second sheet material 2S. At the same time, each ribbon-like sheet material 33T is supplied to each continuous element designed to form elastic elements, so that a continuous element 3S intended to form elastic elements will be placed in the center of the ribbon-like sheet material 33T, determined in the direction of its width. Meanwhile, each tape-shaped sheet material 33T can be supplied in such a way that the continuous element 3S, designed to form elastic elements, will be placed in a predetermined position due to its displacement by a predetermined distance in one direction from the center of the tape-shaped sheet material 33T, determined in the direction of width.

In addition, the second sheet material 2S, the continuous elements 3S intended to form elastic elements, and tape-like sheet materials 33T are passed between the pickup / pull rollers 217 and 218, and the second sheet material 2S and the tape-like sheet materials 33T are glued by means of the continuous elements 3S intended for the formation of elastic elements, with the help of hot-melt solvent-free adhesive deposited on continuous elements 3S, intended for the formation of elastic elements, under the influence of between the rollers, thereby obtaining a continuous element 11S intended for forming the outer covering elements, which should become the outer covering element 11. Meanwhile, by applying adhesive to either the tape-like sheet materials 33T or the second sheet material 2S, or as ribbon-like sheet materials 33T, and on the second sheet material 2S through the device 215 for applying an adhesive coating material (s) can (can) be glued (s) to the continuous elements 3S, intended for the image Bani elastics.

Next, an operation is performed to cut the elastic elements in order to prevent the manifestation of elasticity of the continuous elements 3S, intended for the formation of elastic elements, in that part of the continuous element 11S, intended for the formation of the outer covering elements, in which the absorbent body 40 should be fixed. elements are performed before placing the absorbent body 40 in predetermined places on the front 21 and rear 23 of the continuous element 11S, intended o for the formation of outer covering elements. In this operation of cutting elastic elements, for example, a non-functionalized zone 11N can be formed on a continuous element 11S designed to form external covering elements by using a cutting roller 219 with a part (not shown) intended to form a non-functionalized zone and making it impossible to exert a pulling force created by 3S continuous elements designed to form elastic elements. A part for forming a non-functionalized zone is formed by a plurality of convex parts or cutting inserts that are configured to cut continuous elements 3S for forming elastic members or a plurality of embossing rods that are configured to cure the continuous elements 3S for forming elastic members by heat sealing or the like.

The roller 220, located opposite the cutting roller 219, is a receiving roller for the cutting roller, and its peripheral surface is a smooth surface.

Further, the continuous element 11S for forming the outer covering elements is cut into a part central in the direction of its width by using the slitting device 221 of the outer covering elements so that a front portion 21 of the outer covering element and a rear portion 23 of the outer covering element are formed . Opposite the aforementioned slitting device 221 is a receiving roller 222, wherein a continuous element 11S for forming the outer covering elements is located between the slitting device 221 and the receiving roller 222. In addition, the space between the front part 21 and the rear part 23 of the cut the outer covering element is expanded to a predetermined space. As means for expanding the separation zone, it is preferable to use, for example, rollers 223 and 224, intended to expand the separation zone, and rollers 225 and 226, intended to expand the separation zone, which are located vertically on each of the front part 21 and the rear part 23 of the outer covering item. The individual cut-through continuous elements 11S for forming the outer covering elements are separated until a predetermined space is formed between them by means of these rollers 223-226 intended to expand the separation zone. The aforementioned means for expanding the separation zone is not limited to the aforementioned rollers 223-226 for expanding the separation zone, and any means can be applied provided that this means provides an increase in the space between the front 21 and the rear 23 of the outer covering element.

In addition, the divided front portion 21 and rear portion 23 of the outer covering member are guided so that both of these portions become parallel to each other. As means for guiding both parts to a parallel state, guide rollers (not shown) are preferably used for imparting parallelism. The above-mentioned guide rollers, designed to impart parallelism, are formed, for example, from rollers arranged vertically on each of the front part 21 and the rear part 23 of the outer covering element. This means for directing both parts parallel to each other is not limited to the aforementioned guide rollers, and any means can be applied provided that this means makes the front part 21 and the back part 23 of the outer covering element parallel.

The size and the like of the pull-on diaper 10, including this predetermined interval, are accordingly selected depending on the size and intended use. Meanwhile, the aforementioned cutting operation of the elastic elements can be performed after cutting the continuous element 11S for forming the outer covering elements in a part central to the width direction, or simultaneously with this cutting.

Further, the absorbent body 40, which is obtained by cutting a continuous element 40S, intended for the formation of absorbent bodies and supplied from the part 4, intended for the formation of absorbent bodies, is placed on predetermined areas of the front part 21 and the rear part 23 of the continuous element 11S, designed to form the outer covering elements. At this point, the absorbent body 40 is positioned so that its longitudinal direction becomes, for example, perpendicular to the front 21 and the rear 23. The absorbent body 40 is fixed to the continuous element 11S, designed to form the outer covering elements, while maintaining the stretched state of the continuous element 11S intended for the formation of outer covering elements. For example, the absorbent body 40 is fixed while holding the continuous element 11S, designed to form the outer covering elements, so that it does not decrease in size under the pulling force created by the continuous element 3S, designed to form elastic elements. Typically, an elastic element that is contracted in the longitudinal direction of the absorbent body 40 is also located on the absorbent body 40, and in this case, the absorbent body 40 is also attached to the continuous element 11S, designed to form the outer covering elements, while holding the absorbent body 40 from contractions. In this case, the adhesive is applied in advance to the absorbent body 40 or to the continuous element 11S, intended for the formation of the outer covering elements.

Subsequently, those sections of the outer side of the continuous element 11S, designed to form external covering elements that are end in the direction of its width, are bent so as to close both parts of the absorbent body 40, the ends in its longitudinal direction, and the absorbent body 40 are fixed at the bent sections. When doing this, the adhesive is applied in advance at predetermined locations on the inner sides of the bent sections, on the absorbent body 40, and the like. Since the bent sections (bent sections of the material 31 forming the inner layer, as shown above in Fig. 2) of the continuous element 11S for forming the outer covering elements, are formed from the second sheet material 2S (material 31 forming the inner layer), a sheet of more wide compared to the first sheet material 1S (material 33 forming the outer layer), is used as the second sheet material 2S.

Further, the absorbent body 40 is folded twice in the longitudinal direction, and the front 21 of the continuous element 11S for forming the outer covering elements and the rear part 23 of the continuous element 11S for forming the outer covering elements are superimposed on each other while orienting the second sheet 2S so that it faces inward. After this, the operation of forming side seams is performed to fasten the front part 21 and the rear part 23 to form a part 25 representing a side seam with a predetermined interval. Bonding is performed in the width direction of the continuous member 11S for forming the outer covering members and the continuous member 11S for forming the outer covering members. The predetermined interval in this operation of forming the side seams determines the length in the transverse direction of the stretchable diaper 10. Due to this, receive a continuous element 10S, intended for the formation of stretchable diapers.

Subsequently, the aforementioned continuous member 10S for forming stretchable diapers and formed by connecting the front portion 21 and the rear portion 23 of the outer covering member is cut in the width direction and divided into separate stretchable diapers 10 (10A). As a result, the pull-on diaper 10 (10A) will be completely manufactured, and thus, a design similar to that explained in the first example of the above-mentioned pull-on diaper can be obtained. The continuous element 10S, intended for the formation of stretchable diapers, is cut in the area of the fastened part obtained by performing a side seam. In particular, in one place where the bonded portion is located, two portions of the portions of the side seams are formed in the width direction of the continuous element 11S for forming the outer covering elements, and cutting is performed between the two portions of the portions of the side seams.

In a first variation of the aforementioned manufacturing method, a plurality of pieces of tape-like sheet materials 33T formed by cutting the first sheet material 1S in the longitudinal direction are superimposed on the second sheet material 2S while maintaining a divided state in which the tape-like sheet materials 33T are placed so that the materials 33T do not overlap and between them there is no gap in the width direction to obtain an outer covering element 11, consisting of a material 31 forming an inner layer and a material 33 forming an outer layer. Meanwhile, instead of cutting the first sheet material 1S in the longitudinal direction, a plurality of pieces of tape-shaped sheet materials 33T prepared in advance with a predetermined width can also be aligned and used. The continuous element 11S, designed to form the outer covering elements and intended to form the front part, and the continuous element 11S, intended to form the outer covering elements and intended to form the back part, can also be manufactured separately and in parallel without using the device 221 for slitting the outer covering elements.

When using the manufacturing method of the stretchable wearable product of the present invention, elasticity is maintained similar to the elasticity of a conventional stretchable wearer, and the adherence to the wearer's body and the ability to repeat the movements of the wearer's body are preserved. At the same time, the number of assemblies increases due to the effect due to the fact that the material 33 forming the outer layer is cut in the longitudinal direction, and the zone surrounding the waist is made softer, and the air permeability in this zone can be increased, and the vapor saturation can be reduced. In addition, since the outer covering element 11 has a two-layer structure formed of material 31 forming the inner layer and material 33 forming the outer layer and two materials are adjacent to each other, a stretchable wear article can be easily manufactured using which it will be difficult to see the skin through this product, and the ability to close the skin increases.

In this case, the air permeability increases, and, therefore, there is the possibility of obtaining a stretchable diaper 10 (10A), in which the saturation of the steam decreases and which has a very good ability to close the skin.

Next, a second variation of the manufacturing method of the present invention will be explained below with reference to FIG. 10. A second variation of the manufacturing method is a manufacturing method of the aforementioned pull-on diaper 10 (10B).

As shown in FIG. 10, in the manufacturing method according to the second variety, the roller 231 for forming sealed joints is located between the picking / pulling rollers 217 and 218 and the cutting roller 219 and the receiving roller 220 in the above-mentioned manufacturing method according to the first variant, and in a state in which the first sheet material 1S ( tape-shaped sheet material 33T), a continuous element 3S, designed to form elastic elements (elastic element 35) and the second sheet material 2S (material 31 forming the inner layer) are superimposed on y on other operation is performed formation sealed connections by passing the superposed materials through the roller 231 to form the sealed connections. A receiving roller 232 is disposed opposite the aforementioned roller 231 for forming tight joints, and a continuous element 11S for forming the outer covering elements will be placed between the tight forming joints 231 and the receiving roller 232. By means of the roller 231 for the formation of tight joints, the tightly connected parts 37 form at intervals on both sides in the width direction of the tape-like sheet materials 33T, and the tape 33T base sheet materials are fixed to second 2S sheet material. It is preferable to use an embossing bond to form the sealed parts 37. When using the embossing bond, the drape of the sheet material is not lost, which may be lost when the adhesive and the like have cured, and therefore a good texture can be maintained.

In addition, continuous elements 3S for forming elastic elements are present between the tape-like sheet materials 33T and the second sheet material 2S and between the hermetically connected parts 37 and 37 (not shown in Fig. 10, see the above Fig. 4 (3)) , and the continuous elements 3S for forming elastic elements are also spaced apart to the tape-like sheet materials 33T and to the second sheet material 2S by adhesive in the step preceding the above embossing bond m. Therefore, most of the continuous elements 3S intended to form elastic elements will not be attached to the tape-like sheet materials 33T and to the second sheet material 2S. Due to this, the air permeability of the tape-like sheet materials 33T (pieces 33 of the material forming the outer layer) can be increased in the width direction.

The above adhesive is preferably applied to the second sheet material 2S and ribbon-like sheet materials 33T. The drawing shows a case in which the adhesive is applied to both the second sheet material 2S and the tape-like sheet material 33T, but in the case where the continuous element 3S intended to form elastic elements is narrow and the adhesive can extend around the periphery of the continuous element 3S intended for the formation of elastic elements, the adhesive can be applied only to one of the materials. Meanwhile, the aforementioned adhesive can also be applied to the continuous element 3S, designed to form elastic elements. In such a case, as the place at which the deposition onto the continuous element 3S for forming the elastic elements is carried out, preferably the place immediately before the junction of the second sheet material 2S and the ribbon-like sheet materials 33T.

In addition, at the aforementioned step of forming the sealed joints, the hermetically connected portions 37 (see the aforementioned Fig. 4 (3)) are formed in a controlled manner in the non-woven fabric portions in which the ribbon-like sheet materials 33T and the second sheet material 2S form a two-layer structure with continuous 3S elements designed to form elastic elements placed between them in their stretched state, so that assemblies (not shown) can be formed by tape-like sheet materials 33T (pieces 33 the material forming the outer layer) when the continuous elements 3S, designed to form elastic elements (elastic elements 35) are pulled together. Namely, portions of the tape-shaped sheet materials 33T located between the parts bonded at intervals rise outward (on the side of the surface not in contact with the skin) by pulling together elastic elements formed from continuous elements 3S intended to form elastic elements. Due to this, the aforementioned assemblies are formed.

By this, a continuous element 11S is formed which is intended to form the outer covering elements, which should become the outer covering element 11.

Next, the following operations are carried out, carried out at the cutting step of the elastic elements and after the cutting step of the elastic elements, by using the cutting roller 219, as explained for the aforementioned first variety, thereby completing the manufacture of the pull-on diaper 10 (10B) (for example, see the aforementioned Fig. four). In this type of method, at the stage of cutting the elastic elements, each of the elastic elements 35 is cut in one part at the location of the central zone on which the absorbing element should be placed. Since the step of cutting the elastic elements is not essential, in an alternative embodiment, there is no need to cut the elastic elements 35.

By using the second variation of the manufacturing method of the present invention, effects similar to those of the aforementioned first variation can be obtained, and the breathability of the zones in which the tape-shaped sheet materials 33T are provided (pieces 33 of the material forming the outer layer) can be enhanced. In addition, assemblies can be formed in the width direction of the pieces 33 of material forming the outer layer, while securing the tape-like sheet materials 33T. Due to this, the aesthetic impression created by the decorative material can be ensured.

In addition, by fastening the continuous elements for forming elastic elements to the first sheet material 1S or the second sheet material 2S and bonding the first sheet material 1S and the second sheet material 2S, a larger amount of adhesive becomes unnecessary, and thus it becomes possible to reduce the load on the environment, and costs are reduced compared to the first variety.

Next, a third variation of the manufacturing method of the present invention will be explained below with reference to FIG. 11. A third variation is a method of manufacturing the aforementioned stretchable diaper 10 (10C).

As shown in FIG. 11, the first sheet material 1S is supplied from the upper side, and the second sheet material 2S is supplied from the lower side. The first sheet material 1S forms pieces 33 of the material forming the outer layer, and itself has elasticity in the longitudinal direction (the direction of the waist). An example is one in which a layer of fibers is present on the surface of an elastic sheet. Therefore, unlike the aforementioned first variety, elastic elements 35 are not used. The second sheet material 2S forms a material 31 forming an inner layer.

First, the entire surface area of the aforementioned first sheet material 1S is machined using teeth and troughs as a treatment for extensibility by using a concave-convex roller 241. As a result, the grooves 34 (not shown in Fig. 11, see Fig. 5 (3 )) are formed on the first sheet material 1S in the width direction. Due to this treatment, using the teeth and troughs, the fiber layer in the first sheet material 1S is given the ability to stretch in its longitudinal direction without creating obstacles to the manifestation of elasticity of the elastic sheet, thereby creating the possibility of the manifestation of elasticity of the first sheet material 1S. The intervals between the grooves 34 are adjusted depending on the thickness of the nonwoven fabric forming the first sheet material 1S, and, for example, are set equal to the intervals that correspond to the above-mentioned pull-on diaper 10C. In addition, the concave-convex roller 242, which engages with the concave-convex roller 241, is located in a place opposite the roller 241.

Further, as explained for the aforementioned first variety, the first sheet material 1S, which has been subjected to the aforementioned treatment using teeth and depressions, is divided into a plurality of pieces by means of a slitting device 211 for cutting the material forming the outer layer to obtain tape-like sheet materials 33T. After that, the obtained tape-like sheet materials 33T are moved to the gap between the pick-up / pull rollers 217 and 218 in a state in which these materials are wound around the pick-up / pull roller 217, while maintaining the state of the first sheet material 1S in which it is cut in the longitudinal direction and in which there is no gap between the tape-shaped sheet materials 33T and 33T and the tape-like sheet materials 33T and 33T do not overlap. In addition, the aforementioned treatment using teeth and depressions may be performed after dividing the first sheet material 1S into a plurality of pieces by means of a slitting device 211 for cutting the material forming the outer layer.

On the other hand, the second sheet material 2S is supplied in a state in which the adhesive (not shown) provided by the device 215 for applying the adhesive coating is applied to it. Advantageously, an adhesive is provided to an approximately central portion of that zone to which each of the tape-like sheet materials 33T will be attached in a subsequent step, and the adhesive supply method may be a continuous or discontinuous process.

In this case, the tape-shaped sheet materials 33T are supplied at predetermined intervals to the second sheet material 2S between the pickup / pulling rollers 217 and 218. In addition, by passing the above-mentioned second sheet material 2S and the tape-like sheet materials 33T between the pickup / pulling rollers 217 and 218 of the second sheet the material 2S and the ribbon-like sheet materials 3T are adhered to each other by adhesive applied to the second sheet material 2S due to the pressure between the rollers.

As a result, a continuous element 11S is formed which is intended to form the outer covering elements, which should become the outer covering element 11.

Next, the following steps are performed, including the step of cutting the outer covering member using the slitting device 221 of the outer covering member, which is explained for the first variation of the above manufacturing method of the present invention, and the steps after this cutting step, thereby completing the manufacture of the pull-on diaper 10 ( 10C) (for example, see the aforementioned Fig. 5).

Using a third variation of the manufacturing method of the present invention, effects similar to those of the aforementioned first variation can be obtained. In addition, since elasticity is imparted by the 33T tape-like sheet materials themselves, there is no need to place elastic elements between the first sheet material 1S (pieces 33 of material forming the outer layer) and the second sheet material 2S (material 31 forming the inner layer), and this makes it possible reduce the amount of materials and reduce the cost of materials.

Next, a fourth variation of the manufacturing method of the present invention will be explained below with reference to FIG. 12. A fourth variation is a method of manufacturing the aforementioned stretchable diaper 10 (10D).

A fourth variation is a manufacturing method, including processing using teeth and depressions as a step of extending the extensibility between the gluing step of the second sheet material 2S, which should become the material 31 forming the inner layer, and tape-like sheet materials 33T (first sheet material 1S), which should become pieces 33 of the material forming the outer layer, by means of continuous elements 3S, intended for the formation of elastic elements, using gripper pulling / pulling rollers 217 and 218 and the step of cutting the elastic elements by means of a cutting roller 219 in the aforementioned first variety. The fourth variety is similar to the aforementioned first variety except that it is machined using teeth and troughs. The treatment using teeth and depressions as used in this document is an operation of imparting extensibility to a layer of fibers without creating obstacles, for example, developing extensibility of an extensible sheet forming pieces 33 of material forming the outer layer by pressing the plates of the concave-convex roller 241 to the ribbon-like sheet materials 33T and to the material 31 forming the inner layer. As a result, grooves 34 (not shown in FIG. 12, see the aforementioned FIG. 6) are formed on the tape-shaped sheet materials 33T at intervals. Preferably, the intervals between the grooves 34 are intervals, for example, similar to the intervals between the grooves of the aforementioned pull-on diaper 10C. In addition, the concave-convex roller 242, which engages with the concave-convex roller 241, is located in a place opposite the roller 241.

First, similarly to the aforementioned first variety, the tape-shaped sheet materials 33T obtained by cutting the first sheet material 1S (material 33 forming the outer layer) into a plurality of pieces by means of slitting device 211 are attached to the second sheet material 2S (material 31 forming the inner layer ) while maintaining a divided state in which there is no interval in the width direction between the tape-shaped sheet materials 33T, and the tape-like sheet materials 33T and 33T do not cover each other. For example, 33T tape-like sheeting is an inelastic nonwoven. Subsequently, the tape-shaped sheet materials 33T and the material 31 forming the inner layer, which are glued by placing continuous elements 3S for forming elastic elements between them, are subjected to processing using teeth and depressions as a treatment for imparting extensibility by means of a concave-convex roller 241. Due to this, elongation is manifested in the longitudinal direction of the tape-like sheet material 33T and the material 31 forming the inner layer, so that they will not occur obstacles to the manifestation of elasticity of the continuous elements 3S, intended for the formation of elastic elements (elastic elements 35). Tooth and cavity machining does not affect the elasticity of 3S continuous elements designed to form elastic elements. As a result of this treatment using the teeth and troughs, concavities and bulges (concavity is a groove 34) are formed on the surfaces of the aforementioned ribbon-like sheet materials 33T in the width direction. The intervals between the grooves 34 are adjusted depending on the thickness of the nonwoven fabric forming the first sheet material 1S, and, for example, the intervals between the grooves 34 are set equal to the intervals in accordance with the case of the aforementioned pull-on diaper 10C. In addition, with regard to the aforementioned treatment for imparting extensibility, the processing method is not limited to machining using teeth and troughs, provided that it is a method of providing extensibility of the tape-like sheet materials 33T and the material 31 forming the inner layer.

By using the aforementioned fourth variety, effects similar to those of the aforementioned first variety can be obtained. In addition, since the extensibility is imparted to the tape-like sheet materials 33T (pieces 33 of the material forming the outer layer) and the material 31 forming the inner layer, elasticity can be imparted towards the outer covering element 11 (see the aforementioned Fig. 6) of the stretchable diaper, which corresponds to the direction of the waist. In addition, the assembly is easily formed due to the formation of grooves 34 on the tape-like sheet materials 33T.

Next, a fifth variation of the manufacturing method will be explained below with reference to FIG. 13. The fifth variation is another manufacturing method for manufacturing the aforementioned stretchable diaper 10 (10A).

As shown in FIG. 13, in accordance with a fifth variation, the first sheet material 1S is supplied in a state in which it is divided in advance into a first sheet material 1SA for forming a front portion 21 of the outer covering member 11, and a first sheet material 1SB for forming a rear part. Similarly, the second sheet material 2S is supplied in a state in which it is divided into a second sheet material 2SA, intended to form the front part 21, and a second sheet material 2SB, intended to form the rear part 23. That is, the first sheet materials 1SA and 1SB are used and second sheet materials 2SA and 2SB corresponding to the width of the front and rear, respectively. In addition, the aforementioned first sheet materials 1SA and 1SB are respectively divided into a plurality of pieces by means of devices 211A and 211B for slitting the material forming the outer layer, thereby obtaining ribbon-like sheet materials 33T (33TA) and 33T (33TV). In addition, while maintaining the divided / cut state of the first sheet materials 1SA and 1SB, in which there is no gap between the individual tape-shaped sheet materials 33T and 33T and the tape-like sheet materials 33T and 33T do not overlap, the first sheet materials 1SA and 1SB are wound around the pick-up / pull roller 217 and move to the gap between the pick-up / pull rollers 217 and 218 in the above state.

The subsequent steps are similar to the corresponding steps in the aforementioned first variety except that they do not perform a cutting operation of the continuous member 11S for forming the outer covering members using the slitting device of the outer covering member.

Alternatively, as shown in FIG. 14, the aforementioned first sheet material 1S can be divided into first sheet materials 1SA and 1SB by means of slitting device 216A, and the above-mentioned second sheet material 2S can be divided into second sheet materials 2SA and 2SB by means of slitting device 216B. In this case, after slitting, the space between the first sheet material 1SA and the first sheet material 1SB is expanded to a predetermined space by means (not shown) to expand the separation zone, and at the same time, the interval between the second sheet material 2SA and the second sheet material 2SB is increased to the aforementioned predetermined interval by other means (not shown) to expand the separation zone. As each of the means for expanding the separation zone, a roller for expanding the separation zone can be used. In addition, although this is not shown in the drawing, it is preferable to place means for imparting parallelism to the directions of movement of sheets with an expanded separation zone. Examples of means for parallelizing sheet movement directions include guide rollers designed to parallelize.

In addition, as described above, the aforementioned first sheet materials 1SA and 1SB are respectively divided into a plurality of pieces by means of devices 211A and 211B for slitting the material forming the outer layer, thereby obtaining ribbon-like sheet materials 33T (33TA) and 33T (33TV ) Thereafter, the first sheet material 1S and the second sheet material 2S are guided into the gap between the pick-up / pull rollers 217 and 218 so that a continuous element 3S for forming elastic elements is placed between the first sheet material 1S and the second sheet material 2S. After this, steps similar to those in the first variety are performed. Thus, the outer covering element 11 formed of the first sheet material 1S and the second sheet material 2S with a continuous element 3S intended for the formation of elastic elements and located between the first sheet material 1S and the second sheet material 2S is made divided into the front part 21 and the back part 23. Therefore, the slitting operation of the outer covering member 11 is not performed, as in the aforementioned first embodiment.

By using the aforementioned fifth species, effects similar to those of the aforementioned first species can be obtained. Furthermore, when the first sheet materials 1SA and 1SB having a predetermined width are fed from the very beginning without first cutting the first sheet material 1S in the longitudinal direction, and the second sheet materials 2SA and 2SB having a predetermined width are fed from the very beginning without first cutting the second sheet material 2S in the longitudinal direction, there will be no need to install a device for the longitudinal cutting of the outer covering element. Therefore, the number of production equipment can be reduced, and the cost of production can be reduced.

A method including feeding the first sheet material 1SA and the first sheet material 1SB in a divided state, as in the fifth variation of the manufacturing method, can be applied to the aforementioned second to fourth variations. In any case, the subsequent steps are similar to the corresponding steps in the aforementioned second to fourth varieties except that the step of cutting the continuous member 11S for forming the outer covering members is not performed by using the slitting device of the outer covering member.

Further, a preferred embodiment (second embodiment) of a method for manufacturing a stretchable diaper according to the present invention will be explained below with reference to FIG. 15. The second embodiment is an example in which the manufacturing method of the present invention is applied to a method for manufacturing a conventional stretchable diaper having leg openings, and is a method of manufacturing the aforementioned stretchable diaper 100.

As shown in FIG. 15, the first sheet material 1S (1SA and 1SB) is fed from the upper side and the second sheet material 2S is fed from the lower side, and the continuous elements 3S, designed to form elastic elements, which should become elastic elements 35, are simultaneously fed into the gap between the first sheet material 1SA or 1SB and the second sheet material 2S. The first sheet material 1SA forms a material 33 forming an outer layer on the front side, the first sheet material 1SB forms a material 33 forming an outer layer on the back side, and the second sheet material 2S forms a material 31 forming an inner layer. As shown in FIG. 15, in the second embodiment, the first sheet material 1SA and the first sheet material 1SB are fed onto one sheet of the second sheet material 2S in a state in which they are both separated in the width direction. For the first sheet material 1S (material 33 forming the outer layer), the second sheet material 2S (material 31 forming the inner layer) and the continuous element 3S intended to form elastic elements (elastic element 35), the corresponding materials are similar to those explained in a first example of the aforementioned pull-on diaper.

First, each of the first sheet materials 1SA and 1SB is divided into many pieces by means of a device 211 for slitting the material forming the outer layer to form ribbon-like sheet materials 33TA and 33TV. A receiving roller 212 is disposed opposite the aforementioned slitting device 211, and a first sheet material 1SA or 1SB is located between the receiving roller 212 and the aforementioned slitting device 211. Further, each of the first sheet materials 1SA and 1SB is moved into the gap between the pick-up / pull rollers 217 and 218 while maintaining a divided / cut state in which there is no gap between the tape-shaped sheet materials 33T and 33T obtained by slitting and the tape-like 33T and 33T sheet materials do not overlap. The tape-shaped sheet materials 33T (divided first sheet materials 1S) are prepared so that they have a width similar to the width of the individual pieces 33 of the material forming the outer layer in the pull-on diaper 10A.

In addition, a plurality of pieces of continuous elements 3S for forming elastic elements are prepared in parallel and fed into the gap between the second sheet material 2S and corresponding tape-shaped sheet materials 33T in a state in which the corresponding continuous elements 3S intended for forming elastic elements are elongated. In this case, it is preferable that the tape-shaped sheet materials 33T and the continuous elements 3S intended for forming elastic elements are fed in such a way that the center of the continuous element 3S intended for the formation of elastic elements determined in the width direction corresponds to the center of the aforementioned sheet-like sheet-like sheet defined in the width direction 33T material. In this case, an adhesive (not shown) is applied to the second sheet material 2S and to the tape-like sheet material 33T by means of a device (not shown) for applying an adhesive coating, in accordance with a method similar to the method explained for the above-mentioned first variety. For example, a gun for applying hot-melt adhesive is used as the aforementioned device (not shown) for applying an adhesive coating, in which case a hot-melt adhesive without adhesive is used.

Meanwhile, the second sheet materials 2SA and 2SB, the continuous elements 3S for forming elastic elements, and the tape-like sheet materials 33TA and 33TV are passed between the pick-up / pull rollers 217 and 218. In addition, the second sheet material 2S and the tape-like sheet materials 33T are glued together continuous elements 3S, intended for the formation of elastic elements using previously applied hot-melt solvent-free glue due to the pressure between the rollers, thereby thereby obtaining a continuous element nt 11S, intended to form the outer covering elements, which should become the outer covering member 11.

Then, the continuous element 3S, intended for the formation of elastic elements, is moved into the gap between the cutting roller 219 and the receiving roller 220. After that, the operation of cutting the elastic elements, which makes it impossible to manifest the elasticity of the continuous elements 3S, intended for the formation of elastic elements, in the area to which in the next step, an absorbent body 40 must be attached, carried out by means of a cutting roller 219. The cutting method is similar to the cutting method in the aforementioned first new Nost.

Further, similarly to the aforementioned first variety, the absorbent body 40, which is obtained by cutting continuous material 40S for forming the absorbing bodies, which is supplied from the part 4 for forming the absorbing bodies, is placed in predetermined places of the front part 21 and the rear part 23 of the continuous element 11S intended for the formation of outer covering elements. Thereafter, both ends of the continuous element 11S for forming the outer covering elements defined in the width direction are bent so as to close both parts of the absorbent body 40, end in its longitudinal direction, and the absorbent body 40 is fixed in the area of the bent parts.

Further, leg openings 110 are cut out on portions of both sides of the absorbent body 40 fixed to the continuous member 11S for forming the outer covering members.

Further, the absorbent body 40 is folded in two in the longitudinal direction, and the front 21 of the continuous element 11S for forming the outer covering elements and the rear part 23 of the continuous element 11S for forming the outer covering elements are superimposed on each other while orienting the second sheet material 2S so that it is turned inward, and perform operations, including the operation of the formation of side seams, designed to fasten the front part 21 and the rear part 23 in the direction of their width at predetermined intervals, and the operations performed after the operation of forming the side seams, in order to thereby complete the manufacture of the stretchable diaper 100.

When using the aforementioned manufacturing method according to the second embodiment, similarly to the method according to the aforementioned first variety, while maintaining elasticity similar to that of a conventional stretchable wearer, adherence to the body of the wearer and the ability to repeat the movements of the body of the wearer are maintained. At the same time, the number of assemblies increases due to the effect due to the fact that the material 33 forming the outer layer is cut in the longitudinal direction, and the zone surrounding the waist is made softer, and the air permeability in this zone can be increased, and the vapor saturation can be reduced. In addition, since the outer covering element 11 has a two-layer structure formed of material 31 forming the inner layer and material 33 forming the outer layer and two materials are adjacent to each other, it is possible to obtain a pull-on diaper 100, using which it will be difficult to see skin through it, and the ability to close the skin increases.

As explained above, in the stretchable wear article of the present invention, a plurality of pieces 33 of the material forming the outer layer are arranged in the length direction of the body such that the pieces of the material forming the outer layer are adjacent to each other and do not overlap. Thus, the number of assemblies formed by the pieces 33 of the material forming the outer layer in the stretchable wearable articles 10, 100 increases, and the softness of the zone surrounding the waist increases, the air permeability of this zone can be increased, and the vapor saturation can be reduced. In addition, since the outer covering element 11 has a two-layer structure formed of material 31 forming the inner layer and material 33 forming the outer layer and two materials are adjacent to each other, it becomes difficult to see the skin through this element, and the ability to close the skin is improving.

By using the manufacturing method of the stretchable wearable product of the present invention, a stretchable wearable product with increased elasticity, improved body fit, increased breathability, improved ability to cover the skin and the like can be easily manufactured.

Although the pull-on diaper is used as an example of the pull-on wearer of the present invention in the aforementioned respective embodiments, the cover element of the pull-on diaper used to position the absorbent body on the side of the surface facing the skin is also preferred. In this case, the absorbent body is not particularly limited as long as it absorbs excreted urine and the like, and examples may include absorbent pads, such as urine absorbent pads. Examples of absorbent pads may include an absorbent pad comprising a liquid-permeable top sheet, a liquid-impermeable leak-preventing sheet, and a liquid-retaining absorbent core that is located between these two sheets and is formed with a longitudinally elongated shape, such as a rectangular shape in a plan view. In addition, it is preferable that a matched pair of three-dimensional enclosing elements be formed on both sides extending in the longitudinal direction of the absorbent pad, and it is preferable that sheet materials having elastic elements for forming three-dimensional enclosing elements to form three-dimensional enclosing elements be used. three-dimensional enclosing elements, while these sheet materials should be located on both sides in the longitudinal board absorbent pads. Such an absorbent pad is positioned so that its crotch portion “connects like a bridge” in the longitudinal direction to the back side and the front side of the carrier, with the side of the liquid-permeable sheet of the pad being placed so that it contacts the skin of the carrier. It is preferable to wear the outer covering element of the diaper so that it covers the absorbent pad.

In addition, the stretchable wearable product of the present invention is a concept that encompasses conventional absorbent articles having a stretchable construction, such as hygiene shorts and short-type diapers in addition to the stretchable diapers mentioned above. The stretchable wearable product may be intended for either infants or adults. In addition, the stretchable wear article may be a disposable underwear item that does not contain any absorbent body.

In accordance with the present invention, the following additional remarks are further disclosed (with respect to stretchable wearers or methods for manufacturing the stretchable wearer) given the above embodiments and variations.

<1> A stretchable wearing article comprising:

the front part, which is made to be worn around the front side of the carrier, the crotch part, which is made to be worn along the crotch zone of the carrier, and the rear part, which is made to be worn around the back side of the carrier, and the side edges of the front and the side edges of the back are bonded to form a panty like shape,

wherein

each of the front and rear parts is formed by an outer covering element, in which the first sheet material and the second sheet material are connected by lamination,

a plurality of pieces of the first sheet material are arranged in the direction of the outer covering member corresponding to the body length direction, so that the plurality of pieces of the first sheet material are adjacent to each other and do not overlap, and the outer covering member has elasticity in the direction of embracing the waist.

<2> A stretchable wear article according to the above <1>, wherein each of the multilayer zones has an elastic element between a piece of the first sheet material and the second sheet material, or both the first sheet material and the second sheet material are formed of elastic material, or one of the first sheet material and the second sheet material is formed of an elastic material.

<3> A stretchable wear article according to the above <2>, wherein pieces of the first sheet material are adhered to the second sheet material by means of corresponding elastic elements by using an adhesive.

<4> A stretchable wearer according to the above paragraph <2> or <3>, in which both ends of the elastic elements in a stretched state are attached to respective pieces of the first sheet material and to the second sheet material by using an adhesive;

however, many hermetically connected parts are located in each of the parts in which the pieces of the first sheet material and the second sheet material form a two-layer structure; and

wherein the assemblies are formed in each of the first sheet material and the second sheet material between the hermetically connected parts adjacent in the transverse direction of the tensioned article to be worn.

<5> A stretchable wear article according to any one of the above <2> to <4>, wherein both the first sheet material and the second sheet material are subjected to extensibility treatment, or one of the first sheet material and the second sheet material are processed for giving extensibility.

<6> A stretchable wearable product according to any one of the above <2> to <5>, wherein the first sheet material itself has elasticity in the direction of embracing the waist, and the first sheet material in a stretched state is attached to the second sheet material.

<7> A stretchable wearing article according to the above <6>, wherein the elastic members are located between respective pieces of the first sheet material and the second sheet material.

<8> A stretchable wear article according to any one of the above <2> to <7>, in which pieces of the first sheet material and the second sheet material that are fastened by elastic members are subjected to processing to give stretchability in the direction of embracing the waist, and elastic members in a stretched state are attached to the respective pieces of the first sheet material and to the second sheet material.

<9> A stretchable wear article according to any one of the above <1> to <8>, wherein each of the pieces of the first sheet material is attached to the second sheet material in some part in the width direction of the piece of the first sheet material, and frills are formed at the edge parts which are the free ends of a piece of the first sheet material.

<10> A stretchable wear article according to the above <9>, wherein each of the pieces of the first sheet material is attached to the second sheet material in a part central in the width direction of the piece of the first sheet material.

<11> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <10>, in which the outer covering member is subjected to a treatment to impart extensibility.

<12> A stretchable wear article according to any one of the above <1> to <11>, wherein each of the pieces of the first sheet material is attached to the second sheet material in a part central in the width direction of the piece of the first sheet material, and frills are formed at the edge parts that are the free ends of the piece of the first sheet material.

<13> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <12>, wherein the first sheet material serves as a material forming the outer layer that forms the outer covering element.

<14> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <12>, wherein the first sheet material serves as a material forming the inner layer that forms the outer covering element.

<15> A stretchable wear article according to any one of the above <1> to <14>, wherein the width of the individual pieces of the first sheet material is 1 mm or more, preferably 3 mm or more, and more preferably 5 mm or more.

<16> A stretchable wear article according to any one of the above <1> to <15>, wherein the width of the individual pieces of the first sheet material is 60 mm or less, preferably 40 mm or less, and more preferably 30 mm or less.

<17> A stretchable wear article according to any one of the above <1> to <16>, wherein the width of the individual pieces of the first sheet material is 1 mm or more and 60 mm or less, preferably 3 mm or more and 40 mm or less, and more preferably 5 mm or more and 30 mm or less.

<18> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <17>, wherein the second sheet material serves as the material forming the inner layer that forms the outer covering element, and pieces of material forming the outer layer are attached to the material forming the inner layer, in a part central to the direction of their width.

<19> A stretchable wearing article according to any one of the above paragraphs <1> to <18>,

wherein the stretchable wearer is a stretchable diaper, and

wherein the pull-on diaper is formed from an outer covering element forming the front part and the back part, and from an absorbent body forming the crotch part.

<20> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <19>, wherein the outer covering member is also formed on the crotch portion.

<21> A stretchable wear article according to any one of the aforementioned paragraphs <1> to <20>, wherein the absorbent body is located on the surface of the outer absorbent member in contact with the skin.

<22> A method of manufacturing a stretchable wear article, comprising:

the step of preparing a plurality of ribbon-shaped pieces of the first sheet material, aligned so that the pieces are next to each other and do not overlap each other in the direction of their width;

the step of obtaining the outer covering element by laminating and simultaneously attaching a plurality of pieces of the first sheet material to the second sheet material while maintaining an aligned state of the plurality of pieces of the first sheet material;

the step of superimposing the front of the outer covering element, which should be placed on the front side of the carrier, and the back of the outer covering element, which should be placed on the back side of the carrier, on top of each other and fastening the outer covering element at predetermined intervals; and

the step of cutting the outer covering element in the width direction to separate the individual pull-on diapers.

<23> A method of manufacturing a stretchable wear article according to the aforementioned paragraph <22>, wherein in the step of preparing the ribbon-like pieces of the first sheet material, the pieces of the first sheet material are formed by slitting the sheet material into a plurality of pieces in a width direction.

<24> A method of manufacturing a stretchable wear article according to the aforementioned paragraph <22> or <23>, in which, at the aforementioned bonding step, two groups of outer covering elements are superimposed by orienting the second sheet materials so that they face inward.

<25> A method of manufacturing a stretchable wear article according to any one of the aforementioned paragraphs <22> to <24>, in which each of the pieces of the first sheet material and the second sheet material is fastened by placing an elastic member between them.

<26> A method of manufacturing a stretchable wear article according to any one of the aforementioned paragraphs <22> to <24>, in which both pieces of the first sheet material and the second sheet material in an area in which the elastic member is absent are bonded by embossing in a state in which the elastic elements are located between the respective pieces of the first sheet material and the second sheet material.

<27> A method of manufacturing a stretchable wear article according to the aforementioned paragraph <25> or <26>, in which the elastic elements are supplied in a state in which a plurality of pieces of continuous elements for forming elastic elements are prepared and each of them is in a stretched state and has an adhesive applied thereon, supplied by an adhesive coating apparatus.

<28> A method of manufacturing a stretchable wear article according to any one of the aforementioned paragraphs <22> to <27>, wherein the first sheet material at the front and the first sheet material at the back are fed onto one sheet of the second sheet material in a state in which the first the sheet material at the front and the first sheet material at the rear are at a certain distance from each other in the width direction.

<29> A method of manufacturing a stretchable wear article according to any one of the aforementioned paragraphs <22> to <28>, wherein the stretch processing is performed on one or both of the first sheet material and the second sheet material before joining the first sheet material and the second sheet material by lamination or after reaching the laminated state of the first sheet material and the second sheet material.

<30> A method of manufacturing a stretchable wearable product according to any one of the aforementioned paragraphs <22> to <29>, wherein the stretchable wearer contains an absorbent body, and the absorbent body is placed in a predetermined location of the outer covering member.

<31> A method of manufacturing a stretchable wear article according to the above paragraph <30>, comprising the step of cutting the elastic element to ensure that the elastic element does not exhibit elasticity in the part in which the absorbent body is to be attached before placing the absorbent body in a predetermined location of the outer covering element .

The invention has been described in connection with the options for its implementation, it is provided that the invention should not be limited to any of the details of the description, unless otherwise specified, but rather should be interpreted broadly within its essence and scope defined in the accompanying formula inventions.

This application claims the priority of patent application No. 2012-141397, filed in Japan on June 22, 2012, which is fully incorporated into this document by reference.

DESCRIPTION OF REFERENCE POSITIONS

10 Tensible product to be worn (pull-on diaper)

11 Outer covering element

13 Crotch

21 Front

21A, 21B Side edge

23 back

23A, 23B Side edge

31 Material forming the inner layer

33 Material forming the outer layer

1S first sheet material

2S second sheet material

33T Ribbon-like sheet material.

Claims (16)

1. A stretchable article for wearing, comprising: a front part that is adapted to be worn around the front side of the wearer, a crotch part, which is made to be worn along the crotch area of the wearer, and a rear part, which is made to be worn around the back side carrier, and the side edges of the front part and the side edges of the back part are bonded to form a panty like shape, each of the front part and the back part being formed by an outer covering element m, in which the first sheet material and the second sheet material are connected by lamination, a plurality of pieces of the first sheet material are placed in the direction of the outer covering element corresponding to the body length direction, so that the plurality of pieces of the first sheet material are adjacent to each other and do not overlap , and the outer covering element has elasticity in the direction of embracing the waist. 2. The stretchable wear article according to claim 1, wherein each of the multilayer zones has an elastic element between a piece of the first sheet material and the second sheet material, or both the first sheet material and the second sheet material are formed of elastic material, or one of the first the sheet material and the second sheet material is formed of an elastic material. 3. The stretchable wear article according to claim 2, wherein the pieces of the first sheet material are adhered to the second sheet material by means of corresponding elastic elements by using an adhesive. 4. The stretchable wear article according to claim 2, wherein both ends of the elastic elements in a stretched state are attached to respective pieces of the first sheet material and to the second sheet material by using an adhesive; however, many hermetically connected parts are located in each of the parts in which the pieces of the first sheet material and the second sheet material form a two-layer structure; and wherein the assemblies are formed in each of the first sheet material and the second sheet material between the hermetically connected parts, adjacent in the lateral direction of the tensioned product to be worn. 5. The stretchable wearer according to claim 2, wherein the first sheet material itself has elasticity in the direction of embracing the waist, and the first sheet material in a stretched state is attached to the second sheet material. 6. A stretchable wear article according to claim 5, wherein the elastic elements are located between the respective pieces of the first sheet material and the second sheet material. 7. A stretchable product for wearing according to any one of paragraphs. 1-6, in which each of the pieces of the first sheet material is attached to the second sheet material in part in the width direction of the piece of the first sheet material, and frills are formed on the edge parts, which are the free ends of the piece of the first sheet material. 8. The stretchable wear article according to claim 7, wherein each of the pieces of the first sheet material is attached to the second sheet material in a part central to the width direction of the piece of the first sheet material. 9. A stretchable product for wearing according to any one of paragraphs. 1-6, in which each of the pieces of the first sheet material is attached to the second sheet material in a part central to the width direction of the piece of the first sheet material, and frills are formed at the edge parts, which are the free ends of the piece of the first sheet material. 10. A stretchable product for wearing according to any one of paragraphs. 1-6, in which the first sheet material serves as the material forming the outer layer, which forms the outer covering element. 11. Tensile product to wear according to any one of paragraphs. 1-6, wherein the stretchable wear article is a pull-on diaper, and the pull-on diaper is formed from an outer covering member forming the front and back, and from an absorbent body forming the crotch. 12. A method of manufacturing a stretchable article to be worn, comprising: the step of preparing a plurality of ribbon-shaped pieces of the first sheet material, aligned so that the pieces are next to each other and do not overlap each other in the direction of their width; the step of obtaining the outer covering element by laminating and simultaneously attaching a plurality of pieces of the first sheet material to the second sheet material while maintaining an aligned state of the plurality of pieces of the first sheet material; the step of superimposing the front of the outer covering element, which should be placed on the front side of the carrier, and the back of the outer covering element, which should be placed on the back side of the carrier, on top of each other and fastening the outer covering element at predetermined intervals; and a step of cutting the outer covering member in the width direction to separate the individual pull-on diapers. 13. A method of manufacturing a stretchable wear product according to claim 12, wherein in the step of preparing the ribbon-like pieces of the first sheet material, the pieces of the first sheet material are formed by slitting the sheet material into a plurality of pieces in the width direction. 14. A method of manufacturing a stretchable wear article according to claim 12 or 13, wherein two groups of outer covering elements are superimposed by orienting the second sheet materials so that they face inward at the aforementioned bonding step. 15. A method of manufacturing a stretchable wear product according to claim 12 or 13, in which each of the pieces of the first sheet material and the second sheet material are fastened when placing an elastic element between them. 16. A method of manufacturing a stretchable wear product according to claim 12 or 13, in which both pieces of the first sheet material and the second sheet material in the area in which the elastic element is absent, are fastened by embossing in a state in which the elastic elements are located between the respective pieces of the first sheet material and the second sheet material.

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