CN101068519B - Pants-type disposable diaper - Google Patents

Abstract

Provided is a pants-type disposable diaper which can be easily put on and can be suitably put on. An exterior sheet (20) in a paper diaper (1), comprising: a waist elastic band (25a) formed of a plurality of waist elastic members (25), the waist elastic members (25) being disposed from one joining end portion (21, 22) to the other joining end portion (21, 22) of each of the front body panel (F) and the back body panel (B); a curved elastic band (26a, 28a) formed of a plurality of curved elastic members (26, 28), the curved elastic members (26, 28) extending from one joining end portion (21, 22) of the front body (F) and the rear body (B) toward the crotch portion (20c) and being arranged so as to pass from the crotch portion to the other joining end portion (21, 22); and an absorbent main body (10) disposed in the crotch part (20c), and the curved elastic bands (26a, 28a) are formed so as to cover substantially the entire regions (Trf, Trb) of the outer sheet surrounded by the edge part of the outer sheet (20), the absorbent main body (10), and the waist elastic band (25 a).

Description

Shorts Type Disposable Diapers

technical field

The present invention relates to a pants-type disposable diaper with improved wearability and fit.

Background technique

Conventionally, in underpants-type disposable diapers, in order to fit an absorbent body that absorbs body fluids on the body, an elastic stretchable member is disposed on an outer sheet that holds the absorbent body to improve the fit to the body.

For example, as shown in FIG. 21 , in the diaper main body 50 in which the absorber 40 is interposed between the front panel and the rear panel, there is known a pants-type disposable diaper including a waist elastic member 51 and leg elastic members 52, 52 . . . The waist elastic member 51 is arranged on the front body 50F and the back body 50B which form the waist opening; the leg elastic members 52, 52... are respectively arranged from the front body 50F and the back body 50B to the crotch 50C. The substantially central side of the diaper is curved in a convex shape, and is arranged along the edge of the diaper main body 50 forming the leg opening (for example, refer to Patent Document 1).

And, as shown in FIG. 22 , there is known a shorts-type disposable diaper in which a plurality of elastic stretchable members 61, 61... From the waist opening side to the crotch side, the elastic elastic member is arranged in a convex shape from the waist opening side to the crotch side (for example, refer to Patent Document 2).

Patent Document 1: Japanese Patent Laid-Open No. 2001-258931

Patent Document 2: Japanese Patent Laid-Open No. 2001-204762

However, in the case of the above-mentioned Patent Document 1, since the leg elastic members 52 are arranged along the edge of the diaper main body 50 forming the leg openings, the leg openings can be opened by the contraction force of the leg elastic members 52 . Suitable for the wearer of a diaper, but surrounded by the leg elastics 52, the waist elastics 51 and the absorbent body 40, the substantially triangular region Tr in the outer sheet consisting of the front panel and the back panel, surrounded by the leg elastics 52 and the waist elastic member 51 are contracted so that the inside of the substantially triangular region Tr has a raised shape in a finished state, thereby forming a pocket-like space inside the diaper.

When putting on and taking off such a shorts-type disposable diaper, there is a problem that toes or heels may be caught in the pocket-shaped space, which hinders wearing.

And, in the case of the above-mentioned Patent Document 2, the diaper itself and the absorber of the diaper are fitted to the body by bending the elastic stretchable member on the crotch side among the plurality of elastic stretchable members 61, 61... There is a problem that the contraction force of the elastic elastic member 61 becomes weak due to the force for stabilizing the diaper on the waist, so that the diaper tends to slip off the waist.

In addition, wearers of shorts-type disposable diapers (paper diapers) may have decreased physical strength due to old age, illness, disability, etc., and may have weak wrist strength, or may not be able to reach the back side or buttocks side of the wrist.

When such a wearer uses a paper diaper, he must grasp the front body side and the side edge of the paper diaper and lift it up to wear it on the waistline, but in the case of the existing paper diaper, as shown in Figure 23 , The waist of the back body of the diaper hangs on the raised part of the buttocks, and cannot be lifted up sufficiently, so that the diaper may be worn in an incomplete state. Since the disposable diaper is worn in an incomplete state and does not fit the waistline, it may cause leakage of body fluids such as urine.

Contents of the invention

An object of the present invention is to provide an underpants-type disposable diaper that can be easily put on and fit well.

In order to solve the above-mentioned problems, the present invention as claim 1 provides a pants-type disposable diaper having an absorbent body including an absorber and an exterior sheet integrally provided on the outer surface side of the absorbent body, the exterior sheet The front body and the back body in the sheet are joined at the joint ends of the two ends to form a waist opening and a pair of left and right leg openings, which are characterized in that

The exterior sheet includes: a crotch portion, which is formed with a concave leg cut line for providing leg openings on both sides of the middle, and covers the wearer's crotch area; side, covering the abdomen of the wearer; and a back body, located at the rear end side of the crotch, covering the back of the wearer, the absorbent main body being arranged from the front body of the outer sheet through the lower the extent of the crotch to said back body,

The outer sheet is provided with a waist elastic band formed by a plurality of waist elastic members extending from one joint end to the other joint end of the front body and the back body, respectively. The upper and lower directions are spaced apart and arranged substantially parallel to each other; the front body and the back body are provided with a curved elastic band formed by a plurality of curved elastic members, and the curved elastic members are arranged along the joint end from one side. The leg circumference cutting line extends to the crotch portion, and goes around the crotch portion in a transverse manner, along the leg circumference cutting line on the other side to the joint end portion on the other side,

The curved elastic band is formed at the leg circumference cut line of the outer cover sheet, the side edge of the absorbent main body, the waist elastic band closest to the crotch side among the waist elastic belts, and the outer cover sheet. In the triangular region of the exterior sheet surrounded by the fold line that exists across the crotch at the center of the longitudinal direction, the interval between the curved elastic members constituting the curved elastic band is 9mm or less, and the distance between the curved elastic parts closest to the leg openings is 9mm or less. A curved elastic band is formed on the elastic member to a width region of at least 30 mm or more along the normal direction, and the curved elastic band is formed to cover an area with an area ratio of 70% or more in the triangular region,

In addition, in the triangular region on the front body side, the entire inner region from the curved elastic member closest to the leg opening is covered by the curved elastic band.

According to the invention described in the above technical solution 1, the outer sheet of the underpants-type disposable diaper includes: a waist elastic belt formed by a plurality of waist elastic members, and each of the waist elastic members is formed from one of the front body and the rear body. The joint end of one side reaches the joint end of the other side; the curved elastic band formed by a plurality of curved elastic members that joins the end from one side of at least one of the front body and the back body Extending to the crotch side, it is disposed around the crotch portion to the other side joint end portion; and an absorbent main body disposed on the crotch portion.

The curved elastic band is formed to cover the entire area of the outer cover sheet surrounded by the edge portion of the outer cover sheet, the absorbent main body, and the waist elastic band, so that the entire area of the outer cover sheet is substantially uniformly shrunk by the curved elastic band, thereby preventing As before, the inside of this area will bulge to form a pocket-like space. As a result, when there is no pocket-like space inside the underpants-type disposable diaper (outer sheet) that hinders wearing, when the wearer puts on and takes off the underpants-type disposable diaper, the toes or heels will not be caught on the inside, so it is easy to wear. Shorts type disposable diapers.

In addition, in the shorts-type disposable diaper, in addition to the curved elastic belt (curved elastic member), the waist elastic belt (waist elastic member) is separately provided on the front body and the back body that are in contact with the waist of the body, so that the shorts-type disposable diaper can be used once. The disposable diaper is worn stably around the waist, so the shorts-type disposable diaper is not easy to slip off. Therefore, this underpants-type disposable diaper can be said to be a underpants-type disposable diaper that can be worn comfortably.

The present invention according to claim 2 provides the underpants-type disposable diaper according to claim 1, wherein the start and end portions of the above-mentioned curved elastic belt are arranged at a distance from the start and end portions of the above-mentioned waist elastic belt. The range of the width direction of the said joint end part of the said front body part and the said back body part is the same range.

According to the invention described in claim 2, it has the same effect as the invention described in claim 1, and since the start and end portions of the elastic band are bent, it is arranged at the joint end with the front body where the start and end portions of the waist elastic band are arranged. Therefore, when the wearer wears a shorts-type disposable diaper, the force when the front body and the back body are lifted up is transmitted to the curved elastic belt, Thereby, the crotch part can be lifted easily, and the crotch part of the underpants type disposable diaper can be worn just around the crotch part of the body.

In particular, since the elastic belt is bent, the active force when the front body and the back body are lifted up is easily transmitted to the elastic belt by forming a belt-shaped region in which the elastic members are arranged in a wide range. The underpants-type disposable diaper can also be lifted up with a small force. Thereby, even a wearer with a weak wrist like an elderly person can comfortably wear a shorts-type disposable diaper.

The present invention according to claim 3 provides the underpants-type disposable diaper according to claim 1, wherein the bending elastic member disposed on the outer covering sheet is cut and discontinuous in a region overlapping the absorber. .

According to the invention described in claim 3, the same effect as the invention described in claim 1 is obtained, and since the curved elastic member arranged on the exterior sheet is cut and becomes discontinuous in the range overlapping with the absorber, it bends. The elastic bands do not exert a shrinking force on the absorbent body.

That is, bending the elastic member prevents the absorber from shrinking and curling, so that the absorber is less likely to be deformed, and body fluids such as urine can be well absorbed, thereby reducing leakage of body fluids.

The present invention according to claim 4 provides the underpants-type disposable diaper according to claim 3 , in which the curved elastic member is cut at a position along a side edge shape line of the absorber.

In the present invention according to claim 4 above, the curved elastic member is cut and discontinuous on the absorbent body (not the absorbent main body), and the curved elastic member is formed along the shape line of the side edge of the absorbent body. The location is cut off. That is, since the cutting position of the curved elastic member is changed according to the shape of the side edge of the absorber, the shrinkage of the absorber can be prevented, and the tension of the elastic member can be effectively maintained, so that the absorber can be closely held on the body.

The present invention according to claim 5 provides the underpants-type disposable diaper according to any one of claims 1 to 4 in which the above-mentioned curved elastic member passes at least in the cross-cut region of the above-mentioned absorbent main body with respect to The exterior sheet is spaced apart in the vertical direction and adhesive is applied and bonded in multiple rows along the horizontal direction, and the gap width of the adhesive and the bending elastic member are in the direction of the gap width of the adhesive. The ratio of the separation width of is set to an integer multiple, and on the above-mentioned absorbent main body, the above-mentioned curved elastic member is cut and discontinuous on a line along the longitudinal direction of the diaper.

In the invention according to claim 5, the bending elastic member cuts off the elasticity in order to prevent curling of the absorber under the condition that at least the cross-cut region of the absorbent main body is bonded by welding seam coating. For components, the ratio of the interval width of the above-mentioned adhesive to the separation width between the above-mentioned curved elastic parts in the direction of the adhesive interval width is set to an integer multiple. The adhesive is applied and bonded in a plurality of rows along the horizontal direction at intervals in the vertical direction. As a result, since the intersection between the curved elastic member and the adhesive line coincides on the line along the longitudinal direction of the diaper, when the above-mentioned curved elastic member is cut on the line along the longitudinal direction of the diaper on the absorbent main body, the above-mentioned The fixed points of the bent elastics are aligned consistently.

The present invention according to claim 6 provides the underpants-type disposable diaper according to any one of claims 1 to 4 in which the waist elastic member is cut and discontinuous on the absorber.

In the present invention according to claim 6, the waist elastic member is cut and discontinuous in the absorber. Therefore, curling of the absorber in the width direction can be reliably prevented.

The present invention according to claim 7 provides the underpants-type disposable diaper according to any one of claims 1 to 4: the bending elastic member closest to the crotch side of the bending elastic members disposed on the front body side The member and the curved elastic member closest to the crotch side among the curved elastic members arranged on the back body side are approached without intersecting each other at the crotch.

In the invention described in claim 7, the curved elastic member disposed closest to the crotch among the curved elastic members disposed on the front body side and the curved elastic member disposed closest to the crotch among the curved elastic members disposed on the rear body side The curved elastic members on the side are arranged close to each other without intersecting each other in the crotch. Therefore, in the crotch part, since the above-mentioned curved elastic member presses the absorbent main body against the body side with uniform pressure to make it close to the body, the gap between the body and the body is closed, thereby exerting a high leak-proof effect.

The present invention according to claim 8 provides the underpants-type disposable diaper according to any one of claims 1 to 4 below: the above-mentioned waist elastic member is bonded by coating on the outer peripheral surface of the waist elastic member. The above-mentioned curved elastic member is not coated with adhesive on the outer peripheral surface of the curved elastic member at least in the area where the waist elastic member is arranged, but is attached to the portion where the waist elastic member intersects. The outer peripheral surface of the waist elastic member is coated with an adhesive, and bonded by the applied adhesive.

In the invention described in claim 14 above, with regard to the above-mentioned waist elastic member, the bonding of the waist elastic member is carried out by a controlled seam method in which the waist elastic member is applied on the outer peripheral surface of the waist elastic member. On the other hand, with regard to the above-mentioned curved elastic member, at least in the arrangement area of the waist elastic member, no adhesive is applied to the outer peripheral surface of the curved elastic member, but by The intersecting portions of the above-mentioned waist elastic members are bonded with an adhesive applied to the outer peripheral surface of the waist elastic members. As a result, since the amount and range of the adhesive used is minimized at the side edges of the waist cutout where the elastic members are densely packed, hardening of the sheet by the adhesive can be prevented and a soft feeling can be imparted.

Invention effect

As described in detail above, according to the present invention, it is possible to obtain a shorts-type disposable diaper that is easy to wear and can be fitted.

Description of drawings

Fig. 1 is an external view of the finished product state of the underpants-type disposable diaper of the present invention.

Fig. 2 is an assembly diagram in an unfolded state of the paper diaper.

Fig. 3 is a developed view of the exterior sheet.

FIG. 4 is an enlarged view of a main part of a substantially triangular region Trf of the front body F. As shown in FIG.

FIG. 5 is an enlarged view of a main part of a substantially triangular region Trb of the back body B. As shown in FIG.

Figure 6 is a plan view of the absorbent body.

Fig. 7 is a cross-sectional view taken along line V-V of Fig. 3 .

Fig. 8 is an explanatory view showing a wearing state of the underpants-type disposable diaper of the present invention.

Fig. 9 is a plan view showing a modified example of the underpants-type disposable diaper.

Fig. 10 is a divisional view of the application direction of the elastic member in the exterior sheet.

FIG. 11 is an explanatory diagram of a bonded form of the curved elastic elastic member 28 at the side edge portion of the exterior sheet 20 .

FIG. 12 shows how to assemble the exterior sheet 20, (A) is a schematic diagram, and (B) is a plan view of main parts.

Fig. 13 is a diagram showing an example of how to apply an adhesive in a controlled seam method.

FIG. 14 is an explanatory diagram of a bonded form (modified example) of the curved elastic member 28 at the side edge portion of the exterior sheet 20 .

Fig. 15 shows how to assemble the exterior sheet 20 when cutting the curved elastic member on the absorber, (A) is a schematic view, and (B) is a plan view of main parts.

Fig. 16 is an explanatory diagram of the operation form of the embossing heating roll and the opposing roll.

Fig.17 (a), (b) is explanatory drawing which shows the example of the embossing pattern arrange|positioned in zigzag form.

Fig. 18 is an explanatory view showing a cutting method of the curved elastic members 26..., 28... of the present invention.

19(A) to (C) are diagrams showing modified examples of the cutting method of the present invention.

Fig. 20 is a diagram for explaining problems of a conventional cutting method of a curved elastic member.

Fig. 21 is an explanatory diagram showing a conventional disposable diaper.

Fig. 22 is an explanatory diagram showing a conventional disposable diaper.

Fig. 23 is an explanatory view showing a wearing state of a conventional underpants-type disposable diaper.

Label description

1...paper diaper (disposable diaper for pants), 10...absorbent main body, 13...absorbent body, 20...outer sheet, 20c...inseam, 21...joint end, 22...joint end, 24...waist elastic Parts, 25...waist elastic, 25a...waist elastic, 26...curved elastic, 26a...curved elastic, 28...curved elastic, 28a...curved elastic, 29...leg cut line, F...front body, B...back body, L...leg opening, W...waist opening, Trf...substantially triangular region (region), Trb...substantially triangular region (region)

Detailed ways

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 7 .

Fig. 1 is an appearance view of the finished product state of the underpants-type disposable diaper of the present invention; Fig. 2 is an assembly view in an unfolded state; Fig. 3 is an unfolded view of the exterior sheet. Fig. 6 is a plan view of the absorbent main body of the underpants-type disposable diaper; Fig. 7 is a cross-sectional view along line V-V of Fig. 3 .

As shown in FIGS. 1 to 7 , a pants-type disposable diaper 1 (hereinafter referred to as a paper diaper 1 ) has an absorbent main body 10 including an absorbent body 13 and an exterior sheet integrally provided on the outer surface side of the absorbent main body 10. 20. In the finished state, the front body F on the front end side of the crotch portion 20c in the outer covering sheet 20 and the back body B on the rear end side of the crotch portion 20c are joined at the joint ends (21, 22) Joining is performed to form a waist opening W located at the waist of the wearer and a pair of left and right leg openings L inserted into the legs of the wearer. As shown in Figure 2, in this paper diaper 1, the outer surface side of the absorbent main body 10 is bonded to the upper surface side of the outer covering sheet 20, that is, the body side when wearing the paper diaper, by an adhesive such as hot melt, so that the absorbent The sex main body 10 and the exterior sheet 20 are integrally formed. Then, the crotch portion 20c of the exterior sheet 20 is bent together with the absorbent main body 10, the front body F and the back body B of the exterior sheet 20 are folded, and the joint ends 21 and 22 are thermally welded to each other. or hot-melt adhesives, ultrasonic waves, etc., to assemble the disposable diaper 1 shown in FIG. 1 .

(Absorptive body)

As shown in Figures 6 and 7, the absorbent main body 10 has an absorbent body 13 formed of cotton pulp or superabsorbent resin, etc., interposed by a liquid-permeable surface sheet 11 formed of non-woven fabric, etc., and a material made of polyethylene, etc. The structure between the formed leak-proof sheets 12 is used for absorbing and maintaining body fluids.

And the absorptive main body 10 has the side edge part of the absorptive main body 10 along the longitudinal direction, and has a pair of right and left three-dimensional gathers BS.

The absorber 13 is formed, for example, to have a substantially hourglass shape in plan view, and its width dimension is such that it does not feel hard when it comes into contact with the wearer's body.

Further, the absorber 13 is surrounded by crepe paper 14 in order to maintain the shape and improve the diffusibility of the body fluid passing through the liquid-permeable top sheet 11 . Further, a sub-sheet 17 is sandwiched between the crepe paper 14 and the liquid-permeable top sheet 11 . In addition, as the absorber 13, an air deposition absorber capable of reducing the volume can also be used.

As the liquid-permeable top sheet 11 covering the front side (skin contact side) of the absorber 13, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like can be suitably used. The raw material fibers constituting the nonwoven fabric may be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, regenerated fibers such as rayon, cupro, and natural fibers such as cotton. Nonwoven fabrics obtained by appropriate processing methods such as spunlace, spunbond, thermal bonding, melt blown, and needle punching are used. Among the above-mentioned processing methods, the nonwoven fabric based on the spunlace method is excellent in softness and drapability, and the nonwoven fabric based on the thermal bonding method is excellent in bulk and softness.

In addition, when the liquid-permeable surface sheet 11 is formed with a plurality of meshes, urine and the like can be quickly absorbed, resulting in excellent dryness.

The leak-proof sheet 12 covering the back side (non-skin-contacting side) of the absorber 13 is made of a liquid-impermeable plastic sheet such as polyethylene or polypropylene. In recent years, it is preferable to use a moisture-permeable material from the viewpoint of preventing stuffiness. . The water-blocking and moisture-permeable sheet is, for example, a porous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and stretching in a uniaxial or biaxial direction. In the case of a porous sheet, if the thickness of the sheet is the same, the rigidity is lower than that of a non-porous sheet, and thus the flexibility is better.

It is preferable to use an opaque material as the above-mentioned leak-proof sheet 12 so as to prevent the brown color of defecation and urine from being seen clearly. As the opacification of the leak-proof sheet 12, it is preferable to use a method of adding pigments or fillers such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc, and barium sulfate to olefin resin or plastic to form a thin film.

The three-dimensional pleats BS are formed by folding a double-layered pleated nonwoven fabric 15 and a waterproof sheet 18 sandwiched in the folded pleated nonwoven fabric 15; the pleated nonwoven fabric 15 will be wound by a liquid-permeable surface sheet The side edge part of the absorbent body 13 is further wound from the upper surface, extended to the back side of the absorbent body 13, and bonded. More specifically, the creased nonwoven fabric 15 leaves a portion where the three-dimensional gathers BS are formed in the longitudinal middle part of the disposable diaper 1 (absorbent main body 10), and passes through the range from the width direction middle part to the back side of the absorbent body 13. Hot-melt adhesive or the like is bonded, and at the front and rear end portions in the longitudinal direction, from the middle portion in the width direction to one end edge, in the range to the back side of the absorber 13, and will form a three-dimensional The portion of the gathers BS is bonded with a hot-melt adhesive or the like while the upper surface of the absorber 13 is being folded.

In addition, inside the pleated nonwoven fabric 15 folded in two layers, a plurality of filament-shaped elastic stretchable members 16, 16... are arranged on the rising front end side of the pleats. The filamentary elastic stretchable members 16, 16... are used to make the crepe nonwoven fabric 15 stand up by elastic stretch force to form three-dimensional gathers BS.

As the filamentary elastic elastic member 16, styrene-based rubber, olefin-based rubber, urethane-based rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene-butadiene, silica, polyester, etc. can be used. Raw material. The filamentary elastic stretchable member 16 is preferably arranged to have a thickness of 300-1200 dtex and a tension of 150-350%. Instead of the filament-shaped elastic elastic member, a belt-shaped elastic elastic member having a certain width may also be used.

In addition, the raw material fibers constituting the crepe nonwoven fabric 15 may be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, as with the liquid-permeable surface sheet 11. Natural fibers such as regenerated fibers such as silk and cupro, and natural fibers such as cotton can be non-woven fabrics obtained by appropriate processing methods such as spunlace, spunbond, thermal bonding, melt blown, and acupuncture. In particular, in order to prevent stuffiness, it is preferable to use a nonwoven fabric that suppresses weight and has excellent air permeability. In addition, as for the pleated nonwoven fabric 15, in order to prevent the penetration of urine and the like, prevent skin inflammation, and improve the touch (dry feeling) to the skin, it is also possible to use coated silica, paraffin metal, alkyl triethylene, etc. Water-repellent treated non-woven fabrics such as chromium chloride-based waterproof materials.

(outer sheet)

As shown in Figures 1 to 3, the exterior sheet 20 is a nonwoven sheet of a two-layer structure composed of an upper nonwoven fabric 20A and a lower nonwoven fabric 20B, between the upper nonwoven fabric 20A and the lower nonwoven fabric 20B. Various elastic members described later are arranged to impart stretchability.

The outer covering sheet 20 includes: a crotch part 20c, in order to provide leg openings L on both sides of the middle part, a concave leg circumference cutting line 29 is formed to cover the crotch circumference of the wearer of the diaper 1; the front body part F , positioned at the front end side of the crotch portion 20c, covering the abdomen of the wearer; and the back body B, positioned at the rear end side of the crotch portion 20c, covering the back of the wearer; its planar shape integrally forms an approximate hourglass shape.

On the front body F, a joint end portion 21 for joining to the back body B is formed, and on the back body B, a joint end portion 22 for joining to the front body F is formed.

The joint end portion 21 and the joint end portion 22 have a vertical direction from the opening end side of the waist opening W to the leg opening L having the leg circumference cutting line 29 on the front body F and the back body B, respectively. width.

The exterior sheet 20 includes: a plurality of waist elastic members 24, 24..., which are respectively arranged on the opening end side (upper side) of the waist opening W in the front body F and the back body B; and a plurality of waist elastic members 25. , 25..., the front body F and the back body B are spaced apart from the opening end side of the waist opening W toward the crotch portion 20c in the up-and-down direction and arranged approximately parallel to each other; a plurality of curved elastic members 26 , 26..., on the front body F, extend from one joint end portion 21 to the crotch portion 20c side, go around its crotch portion 20c to the other party joint end portion 21 and configure; and a plurality of curved elastic members 28, 28 . . . extends from one joint end 22 to the crotch 20c side on the back body B, and is arranged around the crotch 20c to the other joint end 22 .

The waist elastic members 24 are arranged at intervals in the vertical direction in the vicinity of the waist opening W in the vertical width range of the joint end portion 21 and the joint end portion 22 joining the front body F and the back body B. A strip of rubber thread-like elastic part imparts stretching force to tighten the waistline of the body, so that the diaper 1 can be worn on the body. Here, the waist elastic member 24 is not limited to a rubber filament-shaped elastic member, and a belt-shaped elastic member may also be used.

The waist elastic member 25 is in the shape of a plurality of rubber threads arranged approximately parallel to each other at intervals in the vertical direction in the joint end portion 21 and the joint end portion 22 joining the front body F and the back body B. The elastic member imparts a stretching force to tighten the waist portions of the front body F and the back body B, so that the diaper 1 is tightly fitted to the body.

Since the plurality of waist elastic members 25, 25... are arranged across a predetermined width and range on the exterior sheet 20, they function as waist elastic bands 25a having a predetermined width, and make the entire front body F and back body B The surface fits snugly against the body.

In addition, the boundary between the waist elastic member 25 and the waist elastic member 24 is not necessarily clear. For example, among the plurality of elastic members arranged at intervals in the vertical direction and substantially parallel to each other on the front body F and the back body B, some upper elastic members function as waist elastic members, and the remaining lower elastic members The elastic part can function as the waist elastic part.

The bending elastic members 26 are arranged separately from the waist elastic member 25 on the front body F. Specifically, at least four or more, preferably six or more, and more preferably eight or more (nine in the present embodiment) are arranged separately. Elastic stretch parts in the form of rubber filaments.

The plurality of curved elastic members 26, 26, . . . are arranged on the exterior sheet 20 over a predetermined width and range, thereby functioning as a curved elastic band 26a having a predetermined width.

The bent elastic band 26a extends from the joint end portion 21 on one side of the front body F, approximately along the leg circumference cutting line 29 to the crotch portion 20c side, goes around its crotch portion 20c, and approximately along the side of the other side. The leg circumference cutting line 29 is arranged so as to reach the other joint end portion 21 .

The curved elastic band 26a is formed to cover substantially the entire triangular region Trf surrounded by the leg circumference cut line 29 which is the edge of the exterior sheet 20, the absorbent main body 10, and the waist elastic band 25a. Here, the curved elastic band 26a covers substantially the entire triangular region Trf, and does not mean that it is densely arranged in the entire region without leaving any space, but means that the above-mentioned triangular region Trf is smaller than the whole of the conventional underpants-type disposable diaper. The number of curved elastic members 26 is more arranged, and the proportion of the arrangement area is also larger.

In the substantially triangular region Trf, as shown in FIG. 4 , the interval P between the curved elastic members 26 is 20 mm or less, preferably 15 mm or less, and more preferably 9 mm or less. Among the bending elastic members 26, 26... constituting the bending elastic band 26a, the bending elastic member 26 closest to the leg opening L is selected. The curved elastic band 26 is formed across a range FZ of at least 30 mm or more, preferably 50 mm or more, in the normal direction, and in the above-mentioned substantially triangular region Trf, it is preferable that the region of the curved elastic band 26a (hatched area in the figure) The occupied area ratio is above 70%.

The start and end portions of the curved elastic band 26a are arranged across substantially the entire range of the vertical width in the joint end portion 21 of the front body piece F, and particularly, at the front body piece F where the start and end portion of the waist elastic band 25a is arranged. The range of the width direction of the joint end part 21 is arrange|positioned in the range of substantially the same.

Furthermore, it is preferable that the bending elastic band 26a (bending elastic member 26 ) bends in an arc-like curved shape to change direction when it goes around the crotch portion 20c. Since elastic force acts on the elastic member in the tangential direction, the force acting on the width direction of the absorbent main body 10 can be minimized by turning the curved elastic member 26 over in the crotch portion 20c in an arc-like curved shape, thereby reducing the size of the crotch. The curling of the absorbent main body 10 in the portion 20c.

On the other hand, the curved elastic member 28 is a plurality of elastic elastic members in the form of rubber filaments arranged separately from the back body B and the waist elastic member 25. Specifically, like the front body F, four or more, preferably six are arranged. or more, and more preferably eight or more (nine in the present embodiment).

The plurality of curved elastic members 28, 28, . . . are arranged on the exterior sheet 20 over a predetermined width and range, thereby functioning as a curved elastic band 28a having a predetermined width.

The elastic band 28a is bent, from the joint end portion 22 on one side of the back body piece B, extends approximately along the leg circumference cut line 29 to the crotch portion 20c side, goes around its crotch portion 20c, and approximately along the other side The cut line 29 of the leg circumference reaches the other joining end 22 and is arranged.

The curved elastic band 28a is formed to cover substantially the entire triangular region Trb surrounded by the leg circumference cut line 29 which is the edge of the exterior sheet 20, the absorbent main body 10, and the waist elastic band 25a. Here, the curved elastic band 28a covers substantially the entire triangular region Trb, and does not mean that it is densely arranged in the entire region without leaving any space, but means that the above-mentioned triangular region Trb The number of the curved elastic members 28 is larger, and the proportion of the configuration area is also larger.

In the substantially triangular region Trb, as shown in FIG. 5 , the interval P between the curved elastic members 28 is 20 mm or less, preferably 15 mm or less, and more preferably 9 mm or less. Among the curved elastic members 28, 28... constituting the curved elastic belt 28a, a curved elastic belt is formed over a range FZ of at least 30 mm or more, preferably 50 mm or more, from the curved elastic member 28o closest to the leg opening L to the normal direction. 28, and in the substantially triangular region Trb, it is preferable that the area ratio of the curved elastic band 28a (hatched region in the figure) is 70% or more. However, since the substantially triangular region Trb of the back body B becomes the heel side when the leg passes through the leg opening L when wearing a diaper, the above-mentioned area ratio may be lower than 70% depending on the situation, but it is preferable to , the area ratio is above 50%.

In addition, the start and end portions of the curved elastic band 28a are arranged across substantially the entire range of the vertical width of the joining end portion 22 of the back body B, and particularly, at the rear end where the waist elastic band 25a is arranged. The width direction range of the joint end part 22 of the body part B is arrange|positioned in substantially the same range.

In addition, it is preferable that the bending elastic band 28a (bending elastic member 28 ) bends in an arc-like curved shape to change direction when it goes around the crotch portion 20c. Since elastic force acts on the elastic member in the tangential direction, the force acting on the width direction of the absorbent main body 10 can be minimized by turning the curved elastic member 28 in an arc-like curved shape at the crotch portion 20c, thereby reducing the size of the crotch. The curling of the absorbent main body 10 in the portion 20c.

In this way, in the exterior sheet 20 of the paper diaper 1, since the substantially triangular region Trf is covered by the curved elastic band 26a, and the substantially triangular region Trb is covered by the curved elastic band 28a, the substantially entire triangular region Trf and the substantially triangular region Trb are substantially uniform. The inner sides of the substantially triangular regions Trf, Trb are not bulged by bending the elastic belt 26a and the bending elastic belt 28a respectively, so that pocket-like spaces are not formed. When there is no pocket-like space inside the disposable diaper 1 that hinders wearing, the disposable diaper 1 is easy to wear because the toes or heels do not get caught inside the disposable diaper 1 when the wearer puts on and takes off the disposable diaper 1 .

In addition, the substantially triangular region Trf and the substantially triangular region Trb in the exterior sheet 20 of the paper diaper 1 are covered and shrunk by the curved elastic band 26a and the curved elastic band 28a, respectively, so that the exterior sheet 20 can be made to conform to the unevenness or bulge of the body, etc. The shape is appropriately stretched.

That is, on the front body F side of the paper diaper 1, the exterior sheet 20 and the absorbent main body 10 can be closely adhered to around the urination opening of the body, and on the back body B side of the paper diaper 1, the exterior sheet 20 can be tightly fitted. Attached to the hip. As a result, the disposable diaper 1 (absorbent main body 10) is more securely adhered to the body, thereby preventing leakage of bodily fluids such as urine.

In addition, the paper diaper 1 has the waist elastic belt 25a (waist elastic member 25) in addition to the bending elastic belt 26a and the bending elastic belt 28a (the bending elastic member 26 and the bending elastic member 28), so that the paper diaper 1 can be stabilized. The disposable diaper 1 is not easy to slip off when worn on the waist.

And, due to the starting and ending portions of the bending elastic belt 26a and the bending elastic belt 28a, the width of the joining end 21 of the front body F and the joining end 22 of the back body B on which the starting and ending parts of the waist elastic belt 25a are arranged Therefore, when the wearer wears the paper diaper 1, the force when the front body F and the back body B are grasped and lifted up is transmitted to the curved elastic belt 26a and the curved elastic belt 28a. , so that the crotch portion 20c can be easily lifted, whereby the crotch portion 20c of the disposable diaper 1 can be properly worn around the crotch of the body. In particular, since the curved elastic belt 26a and the curved elastic belt 28a form a belt-shaped region in which elastic members are arranged in a wide range, the force when the front body F and the back body B are lifted up is easily transmitted to the Since the elastic band 26a is bent and the elastic band 28a is bent, the disposable diaper 1 can be lifted even with a small force. Thereby, even a wearer with a weak wrist like an elderly person can properly wear the disposable diaper 1 .

And, since the front body F and the back body B are joined by the joining ends 21, 22, the force acting on the front body F is transmitted to the curved elastic band 28a through the back body B, and the force acting on the back body B Through the front body F to the curved elastic band 26a. For example, when the wearer grabs the front body F with one hand and lifts the diaper 1 up, as shown in FIG. By bending the elastic band 28a of the sheet B, the rear body sheet B can be lifted up to cover the buttocks appropriately, thereby enabling the disposable diaper 1 to be worn well around the waist. In particular, since the curved elastic band 28a is bent on the crotch portion 20c side, the absorbent main body 10 on the crotch portion 20c side is more reliably brought into close contact with the buttocks to be lifted toward the buttocks, thereby preventing leakage of body fluids such as urine.

In addition, since the paper diaper 1 fits around the waist and is easy to lift, it is possible to reduce wearing in an incomplete state. Thereby, problems such as bodily fluid leakage, poor wearing feeling, poor appearance when worn, blood flow obstruction due to pressure on the body, and skin damage such as chapped skin due to body friction can be alleviated.

Thereby, the paper diaper 1 can be said to be an underpants-type disposable diaper that can be worn comfortably.

In addition, in the above-mentioned embodiment, the waist elastic band 25a (waist elastic member 25), bending elastic band 26a, and bending elastic band 28a (bending elastic member 26, bending elastic member 28) disposed on the front body F and the back body B ), which are continuously arranged in the range overlapping with the absorbent main body 10 (absorbent body 13), or as shown in FIG. continuous. By making the elastic member discontinuous on the absorptive main body 10 (absorbent body 13), curling of the absorptive main body 10 (absorbent body 13) can be prevented. On the absorbent body 13 (not the absorbent main body), when the above-mentioned curved elastic member groups 26..., 28... are cut to make them discontinuous, as shown in FIG. The groups of bent elastic members 26..., 28... may be cut substantially along the shape line of the side edge of the absorber 13, that is, along the shape of the gathers. When the cutting position of the curved elastic member is changed according to the shape of the side edge of the absorber, shrinkage of the absorber can be prevented, and the tension of the elastic members 26..., 28... can be effectively maintained, and the absorber can be held in close contact with the body. 13. Preferably, the elastic member is cut at least 10 mm inward from the end of the absorber 13 (or the absorptive main body 10 ).

Regardless of whether the elastic members are cut off on the above-mentioned absorbent main body 10, as long as the waist elastic member groups 25, 25... and the curved elastic members 26..., 28... are arranged according to the provisions of the present invention in the state before cutting, all include within the purview of superiors.

(Adhering method of elastic members 24-28 and manufacturing method of exterior sheet 20)

Next, a method of manufacturing the above-mentioned exterior sheet 20 will be described.

In this exterior sheet 20, as shown in FIG. 10, in the waist cutout regions _K1 , _K2 , the above-mentioned waist elastic members 24, 24... and the waist elastic member group 25, 25... are applied to the waist elastic members. The adhesives on the peripheral surfaces of the parts 24, 24... and waist elastic parts 25, 25. Instead, the waist elastic members 25, 25, . On the other hand, in the middle region M of the diaper other than the above-mentioned waist cutout regions K ₁ , K ₂ , the groups of curved elastic members 26 . . . , 28 . 20B) on the adhesive for bonding.

That is, in the above-mentioned waist cutout regions K ₁ , K ₂ , the waist elastic members 25, 25 . Into the exterior sheet 20 for bonding, the above-mentioned abdomen side curved elastic member group 26, 26... and the back side curved elastic member group 28, 28... do not apply adhesive on the surface, and the above-mentioned waist elastic member 25, 25 ... when introduced together into the exterior sheet 20, the portions intersecting the waist elastic members 25, 25... are adhered to by the hot-melt adhesive applied on the outer peripheral surface of the waist elastic members 25, 25.... As a result, on the side edges, as shown in FIG. 11 (the abdomen side edge portion is shown), the abdominal elastic member groups 26, 26... are glued only at the portion (marked portion) intersecting with the waist elastic member 25. It is attached to the waist elastic member 25 (and also adhered to the exterior sheet 20 due to the expansion of the adhesive). As a result, since the amount and range of the adhesive is minimized at the side edges where the elastic members 25 . . . 26 . . . , 28 .

In this case, the separation distance d between the waist elastic members 25, 25, . . . and the bending elastic members 26, 28 . Below 1mm. That is, at the side edges, since the intersections between the waist elastic members 25, 25... and the curved elastic members 26..., 28... , there is no reeding of the above-mentioned curved elastic members 26..., 28..., and the start and end of the elastic members 26..., 28... can be positioned near the side edges.

In addition, in order to completely eliminate the amount of reeding of the above-mentioned curved elastic members 26..., 28... at the time of cutting, as shown in FIG. The side edge of the sheet 20 is auxiliary coated with a hot-melt adhesive in the range S of 5-20 mm inward, and the above-mentioned curved elastic member groups 26 ..., 28 ... are bonded to the exterior sheet by the hot-melt adhesive. 20 or more. In this case, as shown in FIG. 12(B) , the curtain coating may be performed partially (P region) across the diaper cut portion (indicated by a chain line) of the waist cutout portion.

On the other hand, in the middle region M of the diaper other than the above-mentioned waist cutout portion, after coating the hot-melt adhesive on at least one side of the nonwoven fabric 20A (20B) of the exterior sheet 20, the adhesive applied surface The curved elastic members 26..., 28... are introduced into the top and bonded.

When manufacturing the above-mentioned exterior sheet 20, as shown in FIG. 12, the upper layer nonwoven fabric 20A is supplied on the upper side of the nip roll part 30, and the lower layer nonwoven fabric 20B is supplied on the lower side, and the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric are Various elastic members (waist elastic member 24, waist elastic member 25, abdominal side bending elastic member 26, and back elastic member 28) are supplied between the cloth 20B. The waist elastic member 25 is coated with a hot-melt adhesive on the outer peripheral surfaces of the elastic members 24 . . . , 25 .

Coating the outer peripheral surfaces of the above-mentioned elastic members 24..., 25..., the following coating methods can be enumerated: for example, as shown in FIG. A coating method using a rubber gun 31 in which an elastic member passes through a groove at the same time; a coating method using an omega member in which an adhesive is applied to an elastic member using an omega (Ω)-shaped link member; and As shown in FIG. 13(B), an elastic member is wound around a curved member 35 and passed through to apply an adhesive, such as a conventionally known controlled seam application method.

On the other hand, the above-mentioned curved elastic members 26 . . . , 28 . The above-mentioned traversing device 32 has a holding part of the elastic members 26..., 28... at the front end, and traverses at the calculated advance and retreat speeds of the continuous web (sheets 20A, 20B) in the width direction, thereby moving the elastic members 26 . . . , 28 . . . are arranged in a predetermined curved shape, whereby the intervals between the above-mentioned curved elastic members 26, 28 are automatically evenly arranged in the side joint edges 21, 22 and the crotch portion. In the present invention, the hot-melt adhesive is introduced without coating its outer peripheral surface, and in the above-mentioned waistline cutout part, at the part intersecting with the above-mentioned waistline elastic members 25, 25..., by applying 25, 25... the adhesive on the outer peripheral surface is bonded.

In addition, at least one of the above-mentioned upper layer nonwoven fabric 20A and lower layer nonwoven fabric 20B, in the illustrated example, is applied to the area corresponding to the diaper middle region M other than the waist cutout portion of the upper layer side nonwoven fabric 20A. The applicator 33 is curtain-coated with a hot-melt adhesive, and the above-mentioned curved elastic members 26..., 28... are bonded to the middle region M of the diaper by the hot-melt adhesive applied to the upper nonwoven fabric 20A.

As above-mentioned hot-melt adhesives, for example, there are types such as EVAs, adhesive rubbers (elastomers), olefins, polyester polyamides, etc., and in this disposable diaper, it is preferable to use the above-mentioned adhesive rubbers ( elastomers).

In the middle region M of the diaper other than the waist cutout portion, in the case of a method in which a hot-melt adhesive is uniformly applied in a curtain shape to the elastic member arrangement region on the sheet side, and the elastic member is introduced thereon to fix it, Since the sheet itself becomes hard and the feeling of wearing may deteriorate, in recent years, a method of applying an adhesive in multiple rows at predetermined intervals and bonding elastic members (hereinafter referred to as seam coating) has been proposed. application (bead coating)).

However, as shown in FIG. 20, under the condition of adopting the above-mentioned weld seam coating method, when the elastic member is cut on the absorber in order to eliminate the curl of the absorber, the fixed point (fixed point line L) of the elastic member does not coincide and the Zigzag problem. As a result, problems such as deterioration of the fit of the absorber or wrinkles on the absorber arise, and there are also problems such as poor appearance.

In order to solve the above-mentioned problems and cut the elastic member across the absorbent body 10 to make it discontinuous, the following method can be suitably adopted.

The manufacture of the above-mentioned exterior sheet 20 is as follows: as shown in FIG. Various elastic members (waist elastic member 24, waist elastic member 25, abdomen side bending elastic member 26, back side elastic member 28) are supplied between the lower nonwoven fabrics 20B, and the exterior sheet 20 is assembled continuously.

The above-mentioned waist elastic members 24 and waist elastic members 25 are bonded to the sheet as follows: a hot-melt adhesive is applied to the outer peripheral surfaces of the above-mentioned elastic members 24 . . . , 25 . Section 30.

On the other hand, regarding the middle region M between the waist elastic members 25, 25... of the front body and the waist elastic members 25, 25... of the back body, at least one of the upper nonwoven fabric 20A and the lower nonwoven fabric 20B is On one side, in the illustrated example, with respect to the lower nonwoven fabric 20B, the weld seam coating is performed by the coater 33 to form a plurality of rows along the horizontal direction at intervals in the vertical direction. The above-mentioned curved elastic members 26..., 28 . . . the middle region M is bonded with the hot-melt adhesive applied to the lower layer nonwoven fabric 2B.

When cutting the above-mentioned curved elastic members 26..., 28... on the absorbent main body 10 to make them discontinuous, it is preferable to use Japanese Patent Laid-Open No. 2002-35029, Japanese Patent Laid-Open No. 2002-178428, and Japanese Patent Laid-Open No. The cutting method described in the gazette. The elastic member cutting method described in the above-mentioned gazette is basically as shown in FIG. Between the embossed heating roll 34 and the facing roll 35 facing the embossing heating roll 34, at least one of pressure and heating between the convex portion of the embossing heating roll 34 and the facing roll 35 is cut off. The curved elastic members 26..., 28... of the laminated sheet 20'. However, the area X in FIG. 15(B) indicates the cutting range.

The opposing roll 35 may be separated from the embossing heating roll 34 in advance as shown in FIG. As shown in FIG.16(b), when the embossing part 34a descends, it abuts on the opposing roller 35. As shown in FIG. On the surface of the embossed portion 34a, small protrusions 40-43 as shown in FIG. catch.

An example of a preferable embossing pattern is shown in FIG. 17( a ) and FIG. 17( b ). Fig. 17(a) is an embossing pattern in which a plurality of linear protrusions are arranged in a zigzag shape. It consists of a pattern in which two rows of protrusion groups repeat alternately, one of which is arranged at a distance D1 in the axial direction of the embossing heating roll 34 (the direction of the black arrow) with a length B1 and a width W1. The linear raised portion 40; the row of another raised portion group, in the direction of the outer peripheral surface of the embossed heating roller 34 (the direction of the hollow arrow), is spaced from the raised portion 40 by a distance M1, and the length of the raised portion 41 is The center line of the direction passes through the point of 2/D1, and the protrusions 41, 41 having the same length B1 and width W1 as the protrusions 40 are arranged. Fig. 17(b) is a pattern in which rhombus-shaped protrusions are arranged in a zigzag pattern. It consists of a pattern in which two rows of raised portion groups are alternately repeated, one of the rows of raised portion groups is arranged with a major axis B2 and a minor axis at a distance D2 in the axial direction of the embossing heating roll 34 (the direction of the black arrow). The rhombus raised portion 42,42 of W2; the column of another raised portion group, in the circumferential surface direction (hollow arrow direction) of the embossing heating roller 34, is separated from the raised portion 42 by a distance M2, and makes the raised portion 42 The minor axis of 2/D2 corresponds to the point of 2/D2, and the same rhombus-shaped protrusions 43, 43 as the protrusions 42 are arranged.

The length B1 of the linear protrusion and the major axis B2 of the rhombus are preferably in the range of 1 to 25 mm, more preferably in the range of 5 to 25 mm. And preferably, the spacing distances D1 and B1 between adjacent protrusions are the same, or B1 is longer. Since it is arranged in a zigzag shape, the protrusions 41 can reliably cut off the parts located between the protrusions 40 and the protrusions 40 . The same is true for D2 and B2, preferably D2≤B2. When B1 or B2 is less than 1 mm, the elastic member may not be cut in some cases, and if it is greater than 25 mm, the area of the sealing part becomes too large, which may deteriorate the skin feel. Therefore, the range of D1 and D2 is also preferably in the range of 1 to 25 mm, and D1 is more preferably in the range of 3 to 25 mm. In the case where the protrusions are diamond-shaped, if the corners of adjacent protrusions in the roller circumferential direction only slightly overlap each other when viewed from the installation direction of the elastic member, the elastic member may come off from the sealing portion and cannot be cut. Therefore, D2 is more preferably 3 to 10 mm.

The width W1 of the linear protrusion and the minor axis W2 of the rhombus are preferably 0.5 to 15 mm. When the thickness is less than 0.5 mm, the elastic member may not be cut; when the thickness is larger than 15 mm, the area of the sealing portion becomes too large, which may degrade the feeling on the skin. Regarding W2, the lower limit is more preferably 1 mm or more.

The distance between the rows of the protrusion group is not particularly limited, but M1 or M2 is preferably 5 to 25 mm. The shape of the protrusions is not limited to the above-mentioned linear shape and rhombus shape, but oblique lines, circles, triangles, stars, and other polygons may be used. It can also be changed according to each column of the raised portion.

Regarding this disposable diaper, when the above-mentioned curved elastic members 26..., 28... are cut off on the absorbent main body 10 to make them discontinuous, in order to make the fixed points of the curved elastic members 26..., 28... approximately in the longitudinal direction of the diaper, Aligned on the same straight line, as shown in FIG. 18, the ratio of the separation width S1 of the above-mentioned adhesive agent to the separation width S2 of the adhesive agent interval width direction between the above-mentioned curved elastic members 26..., 28... is approximately set to an integer Times, set to 1 times in the illustration example. As a result, the intersection points (circle marks) between the adhesive lines and the above-mentioned curved elastic members 26..., 28... are limited to a certain position in the longitudinal direction of the diaper, so that on the absorbent main body 10, there When the above-mentioned curved elastic members 26..., 28... are cut at the position of the direction line, the fixed points of the curved elastic members 26..., 28... are aligned on substantially the same straight line (fixed point line L) in the longitudinal direction of the diaper.

Examples of several other modes are as follows: For example, FIG. 19(A) sets the ratio of the interval width S1 of the above-mentioned adhesive to the separation width S2 of the adhesive interval width direction between the above-mentioned curved elastic members 26..., 28... This is an example when it is approximately doubled. Moreover, the above-mentioned adhesive lines are not limited to linear welds, and each adhesive line may be applied in a spiral shape as shown in FIG. As shown in FIG. 19(C), each adhesive agent line is applied in waves by a SUMMIT sprayer, and is applied in a plurality of rows as a whole.

(Assembling of paper diapers)

The above-mentioned absorbent body 10 and exterior sheet 20 are integrally formed by bonding the absorbent body 10 with an adhesive such as a hot-melt adhesive on the upper surface side of the exterior sheet 20 as shown in FIG. 2 . The absorbent main body 10 and the exterior sheet 20 are folded in the front-rear direction, and the two sides thereof are bonded to each other by thermal welding or a hot-melt adhesive to assemble a pants-type paper diaper.

(Examples of other methods)

(1) In the above-described embodiment, the curved elastic band 26a and the curved elastic band 28a cover substantially the entire triangular regions Trf and Trb. Trb as a whole, so that no pocket-shaped space that hinders wearing is formed inside the disposable diaper 1, and even if a pocket-shaped space that does not hinder wearing is formed, it does not matter. In the above embodiment, the curved elastic band 26a disposed on the front body F side and the curved elastic band 28a disposed on the back body B side are illustrated in a state in which the crotch portion 20c approaches without intersecting each other. But the present invention is not limited thereto, and a part of the curved elastic band 26a and the curved elastic band 28a may cross.

(2) In addition, in the paper diaper 1, the present invention is not limited to having both the curved elastic band 26a disposed on the front body F side and the curved elastic band 28a disposed on the back body B side, as long as at least one of the curved elastic bands is provided. structure.

In addition, specific detailed configurations and the like may be appropriately changed.

Claims (8)

1. A trousers-type disposable diaper comprising an absorbent main body comprising an absorber and an outer sheet integrally provided on the outer surface side of the absorbent main body, wherein a front body sheet and a rear body sheet in the outer sheet are provided on both sides. The joint ends of the end sides are joined to form a waist opening and a pair of left and right leg openings, and it is characterized in that, The exterior sheet includes: a crotch portion, which is formed with a concave leg cut line for providing leg openings on both sides of the middle, and covers the wearer's crotch area; side, covering the abdomen of the wearer; and a back body, located at the rear end side of the crotch, covering the back of the wearer, the absorbent main body being arranged from the front body of the outer sheet through the lower the extent of the crotch to said back body, The outer sheet is provided with a waist elastic band formed by a plurality of waist elastic members extending from one joint end to the other joint end of the front body and the back body, respectively. The upper and lower directions are spaced apart and arranged substantially parallel to each other; the front body and the back body are provided with a curved elastic band formed by a plurality of curved elastic members, and the curved elastic members are arranged along the joint end from one side. The leg circumference cutting line extends to the crotch portion, and goes around the crotch portion in a transverse manner, along the leg circumference cutting line on the other side to the joint end portion on the other side, The curved elastic band is formed at the leg circumference cut line of the outer cover sheet, the side edge of the absorbent main body, the waist elastic band closest to the crotch side among the waist elastic belts, and the outer cover sheet. In the triangular region of the exterior sheet surrounded by the fold line that exists across the crotch at the center of the longitudinal direction, the interval between the curved elastic members constituting the curved elastic band is 9mm or less, and the distance between the curved elastic parts closest to the leg openings is 9mm or less. A curved elastic band is formed on the elastic member to a width region of at least 30 mm or more along the normal direction, and the curved elastic band is formed to cover an area with an area ratio of 70% or more in the triangular region, In addition, in the triangular region on the front body side, the entire inner region from the curved elastic member closest to the leg opening is covered by the curved elastic band. 2. The underpants-type disposable diaper according to claim 1, wherein the start and end of the curved elastic band are arranged on the front body and the front body on which the start and end of the waist elastic band are arranged. within the same range as the range in the width direction of the joint end portion of the rear body. 3. The underpants-type disposable diaper according to claim 1, wherein the curved elastic member disposed on the outer sheet is cut and discontinuous in a region overlapping with the absorber. 4. The pants-type disposable diaper according to claim 3, wherein the curved elastic member is cut at a position along a side edge shape line of the absorber. 5. The pants-type disposable diaper according to any one of claims 1 to 4, wherein said curved elastic member, at least in a cross-cut area on said absorbent main body, is spaced at intervals in an up-down direction And the adhesive applied in multiple rows along the horizontal direction is bonded to the exterior sheet; and the separation width of the adhesive and the separation between the curved elastic members in the direction of the adhesive separation width The width ratio is set to an integer multiple, and on the absorbent main body, the curved elastic member is cut along a line along the longitudinal direction of the diaper to become discontinuous. The underpants type disposable diaper according to any one of claims 1 to 4, wherein the waist elastic member is cut so as to be discontinuous on the absorber. 7. The underpants type disposable diaper according to any one of claims 1 to 4, wherein the curved elastic member closest to the crotch side and the curved elastic member disposed on the side of the curved elastic member disposed on the front body side Among the curved elastic members on the back body side, the curved elastic members closest to the crotch side are close to each other without intersecting each other in the crotch portion. 8. The pants-type disposable diaper according to any one of claims 1 to 4, wherein the waist elastic member is bonded to the waist elastic member by an adhesive applied on the outer peripheral surface of the waist elastic member. On the exterior sheet; the curved elastic member is not coated with an adhesive on the outer peripheral surface of the curved elastic member at least in the area where the waist elastic member is arranged, but is elasticized to the waist at a portion intersecting with the waist elastic member. An adhesive is applied to the outer peripheral surface of the components, and the applied adhesive is used for bonding.

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