WO2014084066A1 - 複合シート材とこれを用いた使い捨て着用物品および複合シート材の製造方法と製造装置 - Google Patents
複合シート材とこれを用いた使い捨て着用物品および複合シート材の製造方法と製造装置 Download PDFInfo
- Publication number
- WO2014084066A1 WO2014084066A1 PCT/JP2013/080897 JP2013080897W WO2014084066A1 WO 2014084066 A1 WO2014084066 A1 WO 2014084066A1 JP 2013080897 W JP2013080897 W JP 2013080897W WO 2014084066 A1 WO2014084066 A1 WO 2014084066A1
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- Prior art keywords
- sheet material
- shaping
- roll
- composite sheet
- pressing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
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- A—HUMAN NECESSITIES
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15739—Sealing, e.g. involving cutting
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- A—HUMAN NECESSITIES
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
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- B32B38/00—Ancillary operations in connection with laminating processes
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F2013/15715—Shaping or making outer layers
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- B32B2555/00—Personal care
- B32B2555/02—Diapers or napkins
Definitions
- the present invention relates to a composite sheet material used for a surface sheet of a disposable wearing article such as a disposable diaper, and more specifically, a three-dimensional sheet material and a flat sheet material are firmly bonded to each other, and have air permeability and the like.
- the present invention relates to a composite sheet material that is excellent in softness and is soft to the touch, a disposable wearing article using the same, and a method and apparatus for manufacturing the composite sheet material.
- a composite sheet material used for a surface sheet of a disposable wearing article a three-dimensional sheet material in which a large number of convex portions are formed and a flat sheet material in which such convex portions are not formed are laminated to each other.
- the disposable wearing article provided with the surface sheet made of this composite sheet material is mounted so that the convex portion protrudes toward the wearer's skin side, and a good wearing feeling is obtained and liquid leakage is effective. To be prevented.
- the above-mentioned conventional composite sheet material is formed by engaging a pair of rolls having a large number of concave and convex shapes on the peripheral surface with each other and engaging one sheet material in the meshed portion, thereby forming a convex portion of the sheet material at the concave portion of the roll.
- Forming a three-dimensional sheet material, holding the three-dimensional sheet material on the roll peripheral surface of one roll by suction, and superimposing another flat sheet material on this, and both sheet materials around the recess in the roll Are manufactured by welding or the like. Therefore, in the obtained composite sheet material, the entire portion (hereinafter also referred to as a base portion) excluding the convex portion of the three-dimensional sheet material is joined to the flat sheet material.
- this conventional composite sheet material has a large bonding area between the three-dimensional sheet material and the flat sheet material, the area of the sheet material formed into a film by welding is large, and the overall softness of the composite sheet material can be increased. Not easy.
- the three-dimensional sheet material is excellent in shape retention because the base adjacent to the above-mentioned convex part is joined to the flat sheet material, but is difficult to be deformed when pressed. It is not easy to increase the flexibility. As a result, it is not easy to further improve the feel and wearing feeling when this composite sheet material is used as a surface sheet material.
- the bonding area is large, it is not easy to increase the bonding pressure, and it is not easy to securely bond the bonding portion. If the three-dimensional sheet material and the flat sheet material are not sufficiently joined, and the joining is released by an external force or the like, the two sheet materials may be displaced from each other and the three-dimensional shape of the convex portion may not be maintained. Furthermore, if both the sheet materials are formed into a film with a large area between the convex portions by welding, there is a problem that the air permeability and liquid permeability as the composite sheet material are lowered.
- the technical problem of the present invention is to solve the above-mentioned problems, and a composite sheet material that is excellent in breathability, flexible, and soft to the touch while the solid sheet material and the flat sheet material are firmly joined to each other And it is providing the manufacturing method and the manufacturing apparatus of a composite sheet material.
- the present invention relates to a composite sheet material, in which a three-dimensional sheet material (2) having a large number of convex portions (3) and a flat sheet material (4) having no such convex portions are laminated and joined together.
- the present invention 2 relates to a disposable wearing article, wherein the composite sheet material (1) of the present invention 1 is used.
- this invention 3 is related with the manufacturing method of a composite sheet material,
- the 2nd which equips the surrounding surface with the 1st shaping roll (11) provided with the shaping
- the first sheet material (17) is guided between the shaping roll (12) to form a three-dimensional sheet material (2) having a large number of convex portions (3), and then the second sheet material (19).
- a flat sheet material (4) comprising the above three-dimensional sheet material (2) is superposed on the above-mentioned three-dimensional sheet material (2), and the three-dimensional sheet material (2) and the flat sheet material (4) are separated from the convex portion (3).
- a junction (5) is formed by pressure-contacting each other.
- this invention 4 is related with the manufacturing apparatus of a composite sheet material,
- the three-dimensional sheet material (2) provided with many convex parts (3) and the flat sheet material (4) which is not provided with such convex parts are mutually laminated
- the first shaping roll (11) has a large number of shaping recesses (21) on the roll peripheral surface, and the shaping position (14) and the pressing position (15, 16) in order from the upstream side in the rotational direction.
- the second shaping roll (12) has a large number of shaping projections (24) on the circumferential surface of the roll, and the above-mentioned forming position (14) While facing the first shaping roll (11), the shaping projection (24) meshes with the shaping recess (21) at the shaping position (14), and the first shaping roll (11) Roll peripheral surface
- a pressing contact protrusion (25) protruding radially outward is provided on any of the roll peripheral surfaces of the pressing roll (13), and the first shaping roll (11) and the pressing roll (13) are provided.
- the three-dimensional sheet material (2) and the flat sheet material (4) which overlap each other, face each other with the tip of the pressing contact projection (25) pressing. It is characterized by.
- the above-mentioned joint portion is separated from the convex portion, it occupies only a part of the base portion excluding the convex portion, and the joint area is narrower than the whole base portion. For this reason, when the above-described three-dimensional sheet material and the flat sheet material are pressed against each other at this joint, these two sheet materials are firmly joined to each other with high pressure. In addition, since the area of the joint is small, the composite sheet material is soft, and the convex part is separated from the joint, so that it can be easily deformed when pressed and exhibits excellent flexibility. Is done.
- the disposable wearing article of the present invention 2 in which this composite sheet material is used for the top sheet of the absorbent body has a good touch and an excellent wearing feeling.
- the composite sheet material is not limited to those manufactured by a specific manufacturing method or manufacturing apparatus. However, when the composite sheet material is manufactured according to the present invention 3 or the present invention 4, the three-dimensional sheet material and the flat sheet material are used in a predetermined manner. It is preferable that it can be easily and reliably joined at the joint.
- the pressing contact protrusion may be provided on either the roll peripheral surface of the first shaping roll or the roll peripheral surface of the pressing roll.
- this pressure-contacting projection protrudes from a portion of the roll peripheral surface of the first shaping roll that is spaced apart from the shaping recess, the resulting composite sheet material becomes the shaping recess described above.
- the joint portion can be formed at a predetermined relative position, that is, a position away from the convex portion.
- the above-mentioned joints may be separated from the above-mentioned projections. However, if a plurality of joints are formed around each projection so as to surround the individual projections, the projections are more firmly identified by the surrounding joints. It is preferable that the shape is retained. In addition, when the joint is formed at the widest part between the adjacent convex parts, that is, at the part farthest from any of the surrounding convex parts, the above convex part is deformably retained.
- the solid sheet material and the flat sheet material can be securely bonded, and it is particularly preferable that the bonded portion is formed only at the widest portion between adjacent convex portions.
- a plurality of the press contact protrusions are provided around each shaping recess so as to surround each shaping recess. Moreover, it is preferable that the portion between the adjacent shaping concave portions is projected at the widest portion, that is, at the portion farthest from any surrounding shaping concave portion.
- the above-mentioned joining portion is not limited to a specific size, but if it is too narrow, there is a risk that the joining of the above-described three-dimensional sheet material and the flat sheet material may be removed, and if too wide, the flexibility of the composite sheet material is sufficiently increased. Is not easy.
- the width of the joint portion is preferably less than 50% of the area of the base portion surrounded by the convex portions, more preferably about 5 to 30%, and further preferably 10 to 25%.
- the “base portion surrounded by the convex portions” is a range in which the convex portions are formed from a region connecting the center points of the plurality of convex portions close to the joint portion in a plan view. It means the part excluding.
- the “width of the joint portion” refers to a value obtained by summing the areas of the joint portions when a plurality of base portions surrounded by the convex portions are formed.
- the composite sheet material manufacturing apparatus includes a three-dimensional sheet material and a flat sheet material in which at least one of the first shaping roll and the pressing roll is pressed by the pressing protrusion. It is preferable to have a heating means for heating the two sheets because they can be welded together at the time of pressure welding.
- the composite sheet material manufacturing apparatus can press the same joint multiple times when the plurality of pressing rolls are provided around the first shaping roll. Even when the pressure contact time at each pressing position is shortened, it is preferable that each joint can be securely pressed and a large number of joints formed over a wide range can be pressed uniformly. In this case, if the above-described pressure contact protrusions are provided on the roll peripheral surface of the first shaping roll, the three-dimensional sheet material and the flat sheet material conveyed on the roll peripheral surface of the first shaping roll are pressed against each other. It is preferable that each press contact portion can be reliably pressed a plurality of times without causing a positional shift by the press contact protrusion and the plurality of pressing rolls.
- the joint part is formed into a film when being heat-welded, the area of the joint part is narrow, and thus it can have good air permeability and liquid permeability. Furthermore, in this case, if at least a part of the joint portion has a through-hole penetrating the composite sheet material, the solid sheet material and the flat sheet material are securely joined around the through-hole, and the through-hole, It is preferable because the composite sheet material can be further improved in air permeability and liquid permeability.
- These through-holes may be formed by increasing the pressure during pressure contact, forming a small protrusion at the tip of the pressure contact protrusion, or by applying tension to the composite sheet material after welding. May be.
- the present invention is configured and operates as described above, the following effects can be obtained.
- the joint portion is separated from the convex portion, and the area of the joint portion is smaller than the area of the base portion surrounded by the convex portion, the three-dimensional sheet material and the flat sheet material are mutually connected at the joint portion. It can be securely bonded at high pressure. As a result, there is no risk of the joint between the three-dimensional sheet material and the flat sheet material coming off and moving each other, and the three-dimensional shape of the convex portion is prevented from being greatly deformed or lost due to the movement of the two sheet materials. it can.
- the joint portion Since the joint portion has a small area, it can be reduced that the composite sheet material is hardened by joining, and the joint portion is separated from the convex portion, so that each convex portion is deformed when pressed. It is easy and can exhibit excellent flexibility as a composite sheet material as a whole. As a result, the disposable wearing article using this composite sheet material as the top sheet of the absorbent body has a good touch and an excellent wearing feeling.
- the joint portion has a small area, even when the solid sheet material and the flat sheet material are firmly joined to each other to form a film or the like, the composite sheet material as a whole has excellent air permeability and permeability. Liquidity can be maintained.
- the composite sheet material (1) includes a three-dimensional sheet material (2) having a large number of convex portions (3) and such convex portions laminated on the three-dimensional sheet material (2).
- Flat sheet material (4) The three-dimensional sheet material (2) and the flat sheet material (4) are joined together by welding at a joint portion (5) formed at a position separated from the convex portion (3). .
- the three-dimensional sheet material (2) and the flat sheet material (4) are not limited to specific materials, for example, non-woven fabrics produced by various manufacturing methods such as air-through nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric. Is used.
- the three-dimensional sheet material (2) and the flat sheet material (4) may be the same material or different materials.
- the flat sheet material (4) is formed wider than the three-dimensional sheet material (2), and the above-mentioned many protrusions (3) are three-dimensional sheets having a narrow width. It is formed over the entire width of the material (2). Therefore, this composite sheet material (1) is provided with a flat region (6) in which convex portions are not formed on both side edges, but since this flat region (6) is formed of only the flat sheet material (4), the composite sheet material (1) The softness of the sheet material (1) as a whole is favorably maintained.
- the flat region (6) is there is an advantage that it can be easily joined to other sheets such as a three-dimensional gather sheet (30). Further, the flat region (6) may be used by being bent so that both side edges of the absorber (28) are wound.
- Reference numeral (31) indicates a thread-like elastic member attached to the three-dimensional gather sheet (30)
- reference numeral (32) indicates a diffusion sheet
- reference numeral (33) indicates a back sheet
- reference numeral (34) indicates an outer layer sheet. Show.
- the widths of the three-dimensional sheet material (2) and the flat sheet material (4) are not limited to specific dimensions, and the widths of both sheet materials (2 and 4) may be the same as each other.
- the three-dimensional sheet material (2) may be wider than the flat sheet material (4).
- the convex portion (3) is formed in the same width as the narrow width sheet material or in a narrower range.
- each convex portion (3) is formed so as to surround each convex portion (3).
- the joint portion (5) is formed at the widest portion between the adjacent convex portions (3, 3), and therefore at the portion farthest from any of the surrounding convex portions (3). That is, in this embodiment, the individual convex portions (3) are arranged so that the center of each convex portion (3) occupies the apex of the quadrangle in plan view, and the joint portion (5 ) Is formed.
- the convex portion (3) and the joint portion (5) are not limited to those having specific dimensions.
- the convex portion (3) preferably has a size corresponding to a perfect circle having a diameter of about 0.5 to 10 mm.
- the joining portion (5) preferably has a size corresponding to a perfect circle having a diameter of about 0.1 to 2 mm.
- the size of the joint portion (5) is preferably less than 50% of the area of the base portion (7) surrounded by the convex portion (3).
- the area of the joint (5) is set to, for example, about 20% with respect to the portion (that is, the base) obtained by removing the region of the convex portion (3) from the area of the square. is there.
- a through hole (8) that penetrates the composite sheet material (1) is formed in a part of the joint portion (5), and the entire composite sheet material (1) has air permeability. And liquid permeability is improved.
- the through hole (8) may be omitted, In order to further improve the liquid permeability, the through holes (8) may be formed in all the joints.
- this composite sheet material manufacturing apparatus includes a first shaping roll (11), a second shaping roll (12), and two pressing rolls (13) whose axial directions are parallel to each other. ⁇ 13).
- a shaping position (14), a first pressing position (15), and a second pressing position (16) are set in order from the upstream side in the rotation direction. is there.
- the second shaping roll (12) faces the first shaping roll (11), and the first pressing position (15) and the second pressing position (16) respectively
- Each pressing roll (13) faces the first shaping roll (11).
- the manufacturing apparatus (10) includes a first supply means (18) and a second supply means (20).
- the first supply means (18) supplies the first sheet material (17) from the supply device (not shown) to the upstream side of the shaping position (14) via the tension controller (26).
- Said 2nd supply means (20) supplies the 2nd sheet
- Both supply means (18, 20) are provided with preheating means (not shown) for preheating the sheet materials (17, 19) supplied by the supply means (18, 20).
- a number of shaping recesses (21) are formed on the roll peripheral surface of the first shaping roll (11).
- a suction means (not shown) is connected to the bottom of the shaping recess (21) via a suction path (22) formed in the first shaping roll (11).
- the first shaping roll (11) is provided with heating means (23) for heating the first sheet material (17) and the second sheet material (19) conveyed on the circumferential surface of the roll. is there.
- the second shaping roll (12) has a large number of shaping projections (24) on the roll peripheral surface.
- the shaping projection (24) meshes with the shaping recess (21) at the shaping position (14).
- a preheating means (not shown) is provided in the second shaping roll (12). The preheating means prevents the first sheet material (17) passing between the two shaping rolls (11, 12) from being cooled by contact with the second shaping roll (12).
- a pressure contact protrusion (25) protruding outward is provided on the roll peripheral surface of the first shaping roll (11), between the shaping recesses (21, 21) adjacent to each other, at a position spaced from each shaping recess (21), the radial direction A pressure contact protrusion (25) protruding outward is provided.
- the protruding position of the pressure contact protrusion (25) corresponds to the joint portion (5) formed on the composite sheet material (1).
- four pressure projections (25) are provided around each shaping concave portion (21) so as to surround each shaping concave portion (21), and are adjacent to each other.
- the protrusions 21 and 21 are provided at the widest part, that is, at the part farthest from any of the surrounding forming recesses (21).
- the press-contact projection (25) is configured such that the three-dimensional sheet material (2) and the flat sheet material (4) overlapped with each other at the respective pressing positions (15, 16), and the pressing roll ( 13) It is configured to press toward the side. Accordingly, the pressure contact protrusion (25) is required to have a height sufficient to press both the sheet materials (2, 4), and is formed to have a slight protrusion height, for example, 1 mm or less. Further, a heating sheet (not shown) is attached to each of the pressing rolls (13) so that the three-dimensional sheet material (2) and the flat sheet material (4) pressed by the pressing contact projection (25) are thermocompression bonded. Means are provided.
- the first sheet material (17) supplied from the supply device (not shown) via the first supply means (18) is the first shaping roll at the shaping position (14).
- the second shaping roll (12) By passing between (11) and the second shaping roll (12), a part thereof is pushed into the shaping recess (21) by the shaping projection (24), and a large number of projections ( 3) is formed.
- the tension of the first sheet material (17) is uniformly adjusted by the tension controller (26), and thereby the convex portion (3) is uniformly formed.
- the shaping recess (21) and the shaping projection (24) are the first sheet material (of the roll peripheral surface of the first shaping roll (11) and the second shaping roll (12)) ( It is formed in the range of the same width as 17), whereby a large number of the convex portions (3) are formed over the entire width of the three-dimensional sheet material (2).
- the shaping recess (21) is formed deeper than the dimension obtained by subtracting the height of the pressure contact projection (25) from the projection height of the shaping projection (24). Thereby, even if the pressing protrusion (25) protrudes from the roll peripheral surface of the first shaping roll (11), the first sheet material (17) pushed in by the shaping protrusion (24) is used. ) Can be reliably received into the shaping recess (21).
- the peripheral edge of the shaping projection (24) is chamfered in a curved shape so that the first sheet material (17) pushed into the shaping recess (21) is not damaged.
- the first sheet material (17) is applied to the heating means (23) provided on the first shaping roll (11) and the second shaping roll (12) or the first supply means (18). Since it is heated by the preheating means provided, a part of the first sheet material (17) is pushed into the shaping concave portion (21), so that the convex portion (3) can be easily formed.
- the solid sheet material (2) is formed in a reliable and reliable manner.
- the three-dimensional sheet material (2) formed with the convex portion (3) is sucked by the suction means via the suction passage (22), so that the roll circumference of the first shaping roll (11) is increased.
- the convex part (3) is smoothly guided in order to the first pressing position (15) and the second pressing position (16) without being detached from the shaping concave part (21).
- the second sheet material (19) supplied between the shaping position (14) and the first pressing position (15) through the second supply means (20) from the supply device (not shown) is:
- the three-dimensional sheet material (2) is overlaid as a flat sheet material (4).
- the second sheet material (19) is supplied by the second supply means (20) as close as possible to the shaping position (14) rather than the first pressing position (15). That is, as shown in FIG. 6, the central angle ( ⁇ ) between the second supply means (20) relative to the first shaping roll (11) and the shaping position (14) is the first. It is set to be smaller than the central angle ( ⁇ ) between the pressing position (15).
- the shaping concave portion (21) is quickly covered with the flat sheet material (4), so that the negative pressure in the suction passage (22) can be secured satisfactorily. 4) and the three-dimensional sheet material (2) are securely held on the roll peripheral surface of the first shaping roll (11) and guided to the first pressing position (15).
- the flat sheet material (4) made of the second sheet material (19) is used as the three-dimensional sheet material. Even if they are superposed on (2), there is no possibility that the three-dimensional sheet material (2) is cooled. As a result, the three-dimensional sheet material (2) and the flat sheet material (4) are guided to the first pressing position (15) while being heated.
- the portion separated from the convex portion (3) is used for the above-mentioned pressure contact. It is pressed at the tip of the protrusion (25), and the pressing force is received and pressed by the pressing roll (13).
- the two sheet materials (2, 4) are further guided to the second pressing position (16), and the second pressing position (16) is also pressed by the tip of the pressing protrusion (25). Is done. Since each of the pressing rolls (13) is sufficiently heated, the two sheet materials (2, 4) are welded to each other at the pressed portion.
- the convex portion (3) formed on the three-dimensional sheet material (2) is arranged so that the center of the convex portion (3) occupies a quadrangular vertex in plan view.
- the convex portions can be arranged in an arbitrary pattern.
- the convex portions may be arranged such that the center of the convex portion occupies the apex of the triangle in plan view. In this case, it is preferable that the joint portion is formed at the center of the triangle.
- the protrusions (3) are arranged so as to be aligned in an oblique direction with respect to the length direction of the three-dimensional sheet material (2).
- the convex portions (3) may be arranged so as to be aligned in the length direction and the width direction of the three-dimensional sheet material (2).
- the above-described convex portions and joint portions are formed in a circular shape in plan view, so that it is preferable that the shaping concave portion and the pressure-contacting projection can be easily manufactured.
- the convex portion and the joint portion are not limited to a specific shape, and can be formed in an arbitrary shape such as a polygon, an ellipse, or a star.
- the press contact protrusion is provided on the roll peripheral surface of the first shaping roll, the joint formed by the press contact protrusion is formed with respect to the convex part formed by the shaping recess. It is preferable because it can be easily formed at a predetermined relative position. However, in the present invention, it is also possible to provide the pressure contact protrusion on the roll peripheral surface of the pressing roll.
- the shaping projections are formed on the roll peripheral surface of the second shaping roll.
- the shaping concave portion may be formed deeper than the projecting dimension of the shaping projection.
- the first shaping roll and both pressing rolls are each provided with heating means
- the second shaping roll and both supply means are respectively provided with preheating means.
- a heating means is provided in at least one of the first shaping roll and the pressing roll, and the other heating means And preheating means can be omitted.
- said embodiment demonstrated the case where a solid sheet material and a flat sheet material were welded together in said joining part.
- the three-dimensional sheet material and the flat sheet material may be bonded to each other with an adhesive or the like at the joint portion.
- the heating means can be omitted. It goes without saying that the material and width of each of the above sheet materials, the size and height of the convex portion, the cross-sectional shape, the size of the joint portion and the like are not limited to those of the above embodiment.
- the composite sheet material of the present invention is a three-dimensional sheet material and a flat sheet material that are firmly joined to each other, but has excellent breathability, flexibility, and good touch, so that disposable diapers, sanitary napkins, etc. It is particularly useful as a surface sheet for disposable wearing articles, but is also useful as a composite sheet material for other uses such as an outer layer sheet of disposable diapers.
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Abstract
Description
さらに、上記の両シート材が溶着により凸部間の広い面積でフィルム化すると、複合シート材としての通気性や透液性が低下する問題もある。
即ち本発明1は複合シート材に関し、多数の凸部(3)を形成した立体シート材(2)と、そのような凸部を有しない平坦シート材(4)とを互いに積層して接合した複合シート材であって、上記の立体シート材(2)は、上記の凸部(3)から離間した接合部(5)で上記の平坦シート材(4)と接合されていることを特徴とする。
従って、上記の本発明4の複合シート材の製造装置は、上記の第1賦形ロールと押圧ロールとの少なくともいずれかが、上記の圧接用突起で押圧される立体シート材と平坦シート材とを加熱する加熱手段を備えていると、圧接の際に両シート材を互いに溶着できて好ましい。
この場合、上記の圧接用突起が第1賦形ロールのロール周面に突設してあると、この第1賦形ロールのロール周面で搬送される立体シート材や平坦シート材が、圧接用突起に対し位置ずれを生じることなく搬送されるので、各圧接部をこの圧接用突起と上記の複数の押圧ロールとにより、位置ずれを生じることなく確実に複数回押圧できて好ましい。
(1)接合部は凸部から離間しており、この接合部の面積が凸部で囲まれた基部の面積よりも狭いので、この接合部で上記の立体シート材と平坦シート材とを互いに、高い圧力で確りと接合することができる。この結果、立体シート材と平坦シート材との接合部が外れて互いにズレ動く虞がなく、上記の凸部の立体形状が両シート材のズレ動きにより大きく変形したり消失したりすることを防止できる。
上記の凸部(3)や接合部(5)は、特定の寸法のものに限定されないが、例えば凸部(3)は直径が0.5~10mm程度の真円に相当する大きさが好ましく、接合部(5)は直径が0.1~2mm程度の真円に相当する大きさが好ましい。
図6に示すように、この複合シート材の製造装置(10)は、軸方向が互いに平行な第1賦形ロール(11)と第2賦形ロール(12)と2本の押圧ロール(13・13)とを備えている。
この第1賦形ロール(11)のロール周面には、回転方向の上流側から順に賦形位置(14)と第1押圧位置(15)と第2押圧位置(16)とが設定してある。この賦形位置(14)で第2賦形ロール(12)がこの第1賦形ロール(11)と対面し、第1押圧位置(15)と第2押圧位置(16)とでそれぞれ上記の各押圧ロール(13)がこの第1賦形ロール(11)と対面している。
また、上記の各押圧ロール(13)には、上記の圧接用突起(25)で押圧される立体シート材(2)と平坦シート材(4)とを加熱圧着するように、それぞれ図示しない加熱手段が設けてある。
上記の賦形用凹部(21)は、上記の賦形用突起(24)の突出高さから上記の圧接用突起(25)の高さを差し引いた寸法よりも深く形成してある。これにより、この第1賦形ロール(11)のロール周面に圧接用突起(25)が突設されていても、上記の賦形用突起(24)で押し込まれた第1シート材(17)の一部を賦形用凹部(21)内へ確実に受け入れることができる。なお、上記の賦形用突起(24)の先端周縁は曲面状に面取りしてあり、賦形用凹部(21)内へ押し込まれる第1シート材(17)が傷つかないようにしてある。
この凸部(3)が賦形された立体シート材(2)は、上記の吸引路(22)を介して吸引手段に吸引されることで、この第1賦形ロール(11)のロール周面に保持され、この凸部(3)が賦形用凹部(21)から離脱することなく、円滑に第1押圧位置(15)と第2押圧位置(16)へ順に案内される。
このとき上記の第2シート材(19)は、上記の第2供給手段(20)により、上記の第1押圧位置(15)よりも賦形位置(14)にできるだけ近接させて供給される。即ち、図6に示すように、第1賦形ロール(11)に対する第2供給手段(20)の配設位置は、賦形位置(14)との間の中心角(α)が、第1押圧位置(15)との間の中心角(β)よりも小さくなるように設定してある。これにより、上記の賦形用凹部(21)がこの平坦シート材(4)によって早期に蓋されるので、上記の吸引路(22)内の負圧を良好に確保でき、この平坦シート材(4)と上記の立体シート材(2)が第1賦形ロール(11)のロール周面に確りと保持されて、第1押圧位置(15)へ案内される。
しかし本発明では、例えば図8に示す変形例1のように、凸部(3)で囲まれた基部(7)に複数の接合部(5)を設けてもよい。この変形例1では、各凸部(3)の周囲に8つの接合部(5)が形成されるので、個々の凸部(3)の形状を良好に保持できる利点がある。
上記の各シート材の材質や幅、凸部の大きさや高さ、断面形状、接合部の大きさ等は、上記の実施形態のものに限定されないことは、言うまでもない。
2…立体シート材
3…凸部
4…平坦シート材
5…接合部
6…平坦領域
7…基部
8…貫通孔
10…複合シート材の製造装置
11…第1賦形ロール
12…第2賦形ロール
13…押圧ロール
14…賦形位置
15…第1押圧位置
16…第2押圧位置
17…第1シート材
18…第1供給手段
19…第2シート材
20…第2供給手段
21…賦形用凹部
22…吸引路
23…加熱手段
24…賦形用突起
25…圧接用突起
26…テンションコントローラ
27…使い捨て着用物品(使い捨ておむつ)
28…吸収体
29…表面シート
30…立体ギャザーシート
31…糸状弾性部材
32…拡散シート
33…バックシート
34…外層シート
α…第1賦形ロール(11)における第2供給手段(20)の配設位置と賦形位置(14)との間の中心角
β…第1賦形ロール(11)における第2供給手段(20)の配設位置と第1押圧位置(15)との間の中心角
Claims (14)
- 多数の凸部(3)を形成した立体シート材(2)と、そのような凸部を有しない平坦シート材(4)とを互いに積層して接合した複合シート材であって、
上記の立体シート材(2)は、上記の凸部(3)から離間した接合部(5)で上記の平坦シート材(4)と接合されていることを特徴とする、複合シート材。 - 上記の接合部(5)は、個々の凸部(3)を取り囲む状態に各凸部(3)の周囲に複数形成してある、請求項1に記載の複合シート材。
- 上記の接合部(5)は、上記の凸部(3)で囲まれた基部(7)の面積の50%未満である、請求項1または2に記載の複合シート材。
- 少なくとも一部の接合部(5)は、複合シート材(1)を貫通する貫通孔(8)を備える、請求項1から3のいずれかに記載の複合シート材。
- 請求項1から4のいずれかに記載の複合シート材(1)を用いてあることを特徴とする、使い捨て着用物品。
- 周面に賦形用凹部(21)を備える第1賦形ロール(11)と、周面に賦形用突起(24)を備える第2賦形ロール(12)との間に第1シート材(17)を案内して、多数の凸部(3)が形成された立体シート材(2)としたのち、第2シート材(19)からなる平坦なシート材(4)を上記の立体シート材(2)に重ね合せ、上記の凸部(3)から離間した部位でこの立体シート材(2)と平坦シート材(4)とを互いに圧接して接合部(5)を形成することを特徴とする、複合シート材の製造方法。
- 上記の接合部(5)を、個々の凸部(3)を取り囲む状態に各凸部(3)の周囲に複数形成する、請求項6に記載の複合シート材の製造方法。
- 上記の接合部(5)は、上記の凸部(3)で囲まれた基部(7)の面積の50%未満である、請求項6または7に記載の複合シート材の製造方法。
- 上記の接合部(5)を、圧接するとともに加熱・溶着することにより形成する、請求項6から8のいずれかに記載の複合シート材の製造方法。
- 多数の凸部(3)を備える立体シート材(2)と、そのような凸部を備えていない平坦なシート材(4)とを互いに積層して接合する複合シート材の製造装置であって、
軸方向が互いに平行な第1賦形ロール(11)と第2賦形ロール(12)と押圧ロール(13)とを備えており、
上記の第1賦形ロール(11)は、ロール周面に多数の賦形用凹部(21)を備えるとともに、回転方向の上流側から順に賦形位置(14)と押圧位置(15・16)とがそのロール周面に設定してあり、
上記の第2賦形ロール(12)は、ロール周面に多数の賦形用突起(24)を備え、上記の賦形位置(14)で上記の第1賦形ロール(11)と対面するとともに、その賦形位置(14)で上記の賦形用突起(24)が上記の賦形用凹部(21)と噛み合い、
上記の第1賦形ロール(11)のロール周面と上記の押圧ロール(13)のロール周面とのいずれかに、径方向外側へ突出する圧接用突起(25)が設けてあり、
上記の第1賦形ロール(11)と押圧ロール(13)は、上記の押圧位置(15・16)で、互いに重なり合った上記の立体シート材(2)と平坦シート材(4)とを上記の圧接用突起(25)の先端が押圧する状態で対面していることを特徴とする、複合シート材の製造装置。 - 上記の圧接用突起(25)は、上記の第1賦形ロール(11)のロール周面のうち、上記の賦形用凹部(21)から離間した部位に突設してある、請求項10に記載の複合シート材の製造装置。
- 上記の圧接用突起(25)は、個々の賦形用凹部(21)を取り囲む状態に各賦形用凹部(21)の周囲に複数突設してある、請求項10または11に記載の複合シート材の製造装置。
- 上記の第1賦形ロール(11)と押圧ロール(13)との少なくともいずれかは、上記の圧接用突起(25)で押圧される立体シート材(2)と平坦シート材(4)とを加熱する加熱手段(23)を備えている、請求項10から12のいずれかに記載の複合シート材の製造装置。
- 上記の第1賦形ロール(11)の周囲に上記の押圧ロール(13)が複数設けてある、請求項10から13のいずれかに記載の複合シート材の製造装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/443,030 US10632028B2 (en) | 2012-11-30 | 2013-11-15 | Composite sheet material, disposable wearing article using the same, and production method and production apparatus for composite sheet material |
| JP2014550126A JP5980949B2 (ja) | 2012-11-30 | 2013-11-15 | 複合シート材とこれを用いた使い捨て着用物品および複合シート材の製造方法と製造装置 |
| CN201380062460.0A CN104822353B (zh) | 2012-11-30 | 2013-11-15 | 复合片材、使用该复合片材的一次性穿戴物品及复合片材的制造方法、制造装置 |
| BR112015010064-3A BR112015010064B1 (pt) | 2012-11-30 | 2013-11-15 | Material de folha compósito, artigo de vestuário descartável, aparelho e método de produção de material de folha compósito |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2012262705 | 2012-11-30 | ||
| JP2012-262705 | 2012-11-30 |
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| US (1) | US10632028B2 (ja) |
| JP (1) | JP5980949B2 (ja) |
| CN (1) | CN104822353B (ja) |
| BR (1) | BR112015010064B1 (ja) |
| MY (1) | MY173787A (ja) |
| WO (1) | WO2014084066A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| MY173787A (en) | 2020-02-21 |
| BR112015010064B1 (pt) | 2021-06-01 |
| US20150290050A1 (en) | 2015-10-15 |
| BR112015010064A2 (pt) | 2017-07-11 |
| JPWO2014084066A1 (ja) | 2017-01-05 |
| JP5980949B2 (ja) | 2016-08-31 |
| CN104822353B (zh) | 2018-04-13 |
| US10632028B2 (en) | 2020-04-28 |
| CN104822353A (zh) | 2015-08-05 |
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