JP4551800B2 - Pants-type disposable diaper - Google Patents

Description

  The present invention relates to a pants-type disposable diaper with improved ease of wearing and fit to the body.

  Conventionally, a pants-type paper diaper as shown in FIG. 16 is known. This disposable paper diaper is provided with a main body back sheet 51 on the outer surface side of a paper diaper main body 50 including a liquid-permeable top sheet 52, a waterproof film 53 made of polyethylene or the like, and an absorbent body 54 interposed between the both sheets. Of structure.

  The main body back sheet 51 has a two-layer structure of a front surface back sheet 55 and a back surface back sheet 56, and a waist elastic member 57 that seals the waist opening of the paper diaper between the two sheets 55, 56. .., 58... Are disposed, and the ventral elastic member 59,... And the back elastic member 60,. A leg-surrounding first elastic member 61 that seals around the leg and a leg-surrounding second elastic member 62 are provided (see Patent Document 1 below).

As shown in FIG. 17, a plurality of elastic members 61, 61... Are arranged along the left-right direction on each of the front body side and the back body side of the diaper body 60, and from the waist opening side to the crotch A pants-type disposable diaper is known in which the elastic member is arranged so as to be convexly curved from the waist opening side toward the crotch part side as it goes toward the part side (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 10-127687 JP 2001-204762 A

  However, in the case of the above-mentioned Patent Document 2, the diaper itself and the absorbent body of the diaper are fitted to the body by curving the elastic member on the crotch part side among the plurality of elastic members 61, 61. Further, there is a problem that the contraction force of the elastic member 61, which is an action force for stabilizing the diaper around the waist, is weakened, and the diaper is easily slipped off from the waist.

  In addition, pants-type disposable diapers (paper diapers) are worn by elderly people or have weak physical strength due to illness or disability. There may be no. And when such a wearer uses a paper diaper, it may have to be worn around the waist by grabbing the front body side and side part side of the paper diaper, but in the case of a conventional paper diaper, As shown in FIG. 18, the waist part of the back body of the paper diaper is caught by the swelling of the buttocks and is not sufficiently lifted, and the paper diaper may be worn in an incomplete state. And the wearing of a paper diaper is an incomplete state, and it may become the cause of bodily fluids, such as urine, by not fitting around the waist.

  Therefore, a main object of the present invention is to provide a pants-type disposable diaper that can easily pull up the diaper when worn and has excellent adhesion to the body in the front body and / or the back body.

In order to solve the above-mentioned problem, the present invention according to claim 1 is provided with an absorbent main body including an absorbent body, and an exterior sheet integrally provided on the outer surface side of the absorbent main body. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed by joining the front body and the back body of the seat at the joint edges of both side ends,
The exterior sheet extends to the crotch side starting from the waist opening edge or the vicinity thereof at the front body and / or the back body, bypassing the crotch side and reaching the waist opening edge or the vicinity again, One or a plurality of mounting elastic members arranged so that the width of the forward curve toward the side and the reverse curve returning from the crotch side gradually narrows from the waist opening edge toward the crotch side ,
The exterior sheet has a waist portion elastic member disposed around the waist opening and / or an interval in the vertical direction from one joining edge to the other joining edge in the front body and the back body. A plurality of waist elastic members disposed substantially parallel to each other,
The waist elastic member and / or waist elastic member is fixed to the exterior sheet by an adhesive applied to a peripheral surface of the elastic member, and the mounting elastic member includes at least the waist elastic member and / or In the region where the waist elastic member is disposed, the waist elastic at the intersection with the waist elastic member and / or the waist elastic member without applying an adhesive to the peripheral surface of the mounting elastic member. A pants-type disposable diaper characterized by being fixed by an adhesive applied to a peripheral surface of a member and / or a waist elastic member .

  The invention according to claim 1 extends to the crotch side with the waist opening edge or the vicinity thereof as a starting end with respect to the exterior sheet, detours on the crotch side and reaches the waist opening edge or the vicinity thereof again, Provided with one or a plurality of mounting elastic members arranged so that the width of the forward curve toward the crotch side and the width of the return curve returning from the crotch side gradually narrows from the edge of the waist opening toward the crotch side It is.

  Therefore, when the wearer grasps the waist opening and tries to lift the diaper upward, the acting force is transmitted to the mounting elastic member, and the diaper can be easily pulled up by the elastic force. Moreover, since the said elastic member for mounting | wearing is arrange | positioned in the front body and / or the whole back body, a diaper can be closely_contact | adhered to a body at the time of mounting | wearing.

In addition, the exterior sheet extends in the vertical direction from one joint edge to the other joint edge in the waist elastic member and / or the front body and the back body disposed around the waist opening. A plurality of waist elastic members disposed substantially parallel to each other at intervals,
The waist elastic member and / or waist elastic member is fixed to the exterior sheet by an adhesive applied to a peripheral surface of the elastic member, and the mounting elastic member includes at least the waist elastic member and / or In the region where the waist elastic member is disposed, the waist elastic at the intersection with the waist elastic member and / or the waist elastic member without applying an adhesive to the peripheral surface of the mounting elastic member. It is fixed by an adhesive applied to the peripheral surface of the member and / or the waist elastic member.

That is, the waist elastic member and / or the waist elastic member is fixed to the exterior sheet by an adhesive applied to the peripheral surface of the elastic member, and at least the waist elastic member is attached to the mounting elastic member. And / or in the region where the waist elastic member is disposed, the adhesive is not applied to the circumferential surface of the mounting elastic member, and at the intersection with the waist elastic member and / or waist elastic member, It is fixed by an adhesive applied to the peripheral surface of the waist elastic member and / or the waist elastic member. Therefore, since the amount and range of the adhesive used in the front body and / or the back body where the elastic members are densely packed are minimized, the sheet can be prevented from being cured by the adhesive, and softness can be imparted.

The wearing elastic member intersects the waist elastic member and / or the waist elastic member, and both elastic members are coupled at each intersection so that the wearer grasps the waist opening and moves upward. When the diaper is pulled up to the side, the acting force is transmitted to the mounting elastic member, and the acting force is efficiently transmitted to the waist elastic member and / or the waist elastic member. It can be pulled up easily. In order to facilitate the lifting of the diaper, it is desirable that the exterior sheet includes at least the waist elastic member, and the mounting elastic member is coupled to the waist elastic member.

  As the present invention according to claim 2, there is provided the pant-type disposable diaper according to claim 1, wherein the crotch-side bypass portion of the mounting elastic member is located within a range of ± 100 mm from the folding line between the front body and the back body. The

  In the invention according to the second aspect, the crotch side bypass portion of the mounting elastic member is positioned within a range of ± 100 mm from the folding line between the front body and the back body. In other words, since the elastic member for mounting extends to the vicinity of the fold line, the elastic force of the elastic member for mounting extending to the lower side is raised when the diaper is pulled up during mounting. It is transmitted to the relatively heavy absorbent main body, and the absorbent main body can be easily pulled up.

According to a third aspect of the present invention, there is provided the pant-type disposable diaper according to any one of the first to second aspects, wherein the mounting elastic member is disposed so as to intersect with the upper and lower edges of the absorbent main body. .

In the invention according to claim 3 , the elastic member for mounting is arranged so as to intersect with the upper and lower edges of the absorbent main body, whereby the absorbent main body can be held in close contact with the body.

As the present invention according to claim 4 , there is provided the pant-type disposable diaper according to any one of claims 1 and 2 , wherein the mounting elastic member is arranged so as to intersect with both side edges of the absorbent main body. .

In the present invention according to claim 4 , the elastic member for mounting is arranged so as to intersect with both side edges of the absorbent main body so that the absorbent main body can be held in close contact with the body, particularly in the crotch region. Become.

As this invention which concerns on Claim 5 , while the said elastic member for mounting | wearing is arrange | positioned so that the both-sides edge of the said absorptive main body may cross | intersect, with respect to an exterior sheet at least in the crossing area | region on the said absorptive main body It is fixed by an adhesive applied so as to form a plurality of rows along the horizontal direction at intervals in the vertical direction, and the adhesive interval width and the adhesive interval width direction between the mounting elastic members It sets the ratio between the spacing width substantially integral multiple, and on the absorbent body, to any claim 1-2, wherein the mounting elastic member is discontinuous is cut on the line along the diaper longitudinal direction The described pants-type disposable diaper is provided.

In the invention of claim 5 , the elastic member for mounting is arranged so as to intersect with both side edges of the absorbent main body, and at least in a transverse region on the absorbent main body with respect to the exterior sheet. For mounting to prevent the absorber from shrinking under the condition that it is fixed by a bead coating method that is fixed by an adhesive applied in multiple rows along the horizontal direction at intervals in the vertical direction. In cutting the elastic member, the ratio between the gap width of the adhesive and the spacing width in the adhesive gap width direction between the curved elastic elastic members is set to be approximately an integral multiple.

  As a result, since the intersection between the mounting elastic member and the adhesive line is aligned on a line along the diaper longitudinal direction, the mounting elastic member is a line along the diaper longitudinal direction on the absorbent main body. If it cut | disconnects above, the fixing point of the said elastic member for mounting | wearing will come uniformly.

  As described above in detail, according to the present invention, the diaper can be easily pulled up when worn, and a pants-type disposable diaper having excellent adhesion to the body in the front body and / or the back body can be obtained.

In addition, the sheet can be prevented from being cured by the adhesive, and softness can be imparted. According to the fifth aspect of the present invention, when the elastic member is cut on the absorbent main body in order to prevent the absorber from being contracted, the fixing point of the elastic member is uniformly on the line along the longitudinal direction of the diaper. Can be aligned.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a product state external view of a pants-type disposable diaper according to the present invention, FIG. 2 is an assembled view in an unfolded state, FIG. 3 is an unfolded view of an absorbent main body 10, and FIG. FIG. 5 is a development view of the exterior sheet 20.

  As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 (hereinafter also simply referred to as a diaper) is composed of a liquid-permeable surface sheet 11 made of a nonwoven fabric and the like, and a leak-proof sheet 12 made of polyethylene or the like. It consists of an absorbent main body 10 with an absorbent body 13 such as cotton pulp interposed therebetween, and an exterior sheet 20 provided integrally on the outer surface side of the absorbent main body 10. It is a pants-type diaper having a structure in which a waist opening 23 and a pair of left and right leg openings 30 are formed by overlapping a front body and a back body of the exterior sheet 20 and joining at joint edges on both ends. .

  Hereinafter, the structure of the absorptive main body 10, the exterior sheet 20, the manufacturing method thereof, and the assembly procedure of the diaper will be described in this order.

(Structure of the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail based on FIG. 3 and FIG.

  As described above, the absorbent main body 10 has a structure in which an absorbent body 13 such as cotton-like pulp is interposed between a liquid-permeable surface sheet 11 made of a nonwoven fabric or the like and a leak-proof sheet 12 made of polyethylene or the like. And absorbs and retains body fluids.

  In the illustrated example, the absorbent body 13 is formed with a substantially square shape in plan view, and the width dimension thereof is a dimension width that does not give the wearer a feeling of gore by hitting the crotch portion. The absorbent body 13 is surrounded by the crepe paper 14 in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable surface sheet 11. As the absorber 13, it is desirable to use an airlaid absorber that can reduce the bulk.

  As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid-permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid-permeable top sheet 11 extends to the back side of the absorbent body 13 around the side edge of the absorbent body 13.

  The leak-proof sheet 12 covering the back surface side (non-skin contact surface side) of the absorbent body 13 is made of a liquid-impervious plastic sheet such as polyethylene or polypropylene, but in recent years has moisture permeability from the viewpoint of preventing stuffiness. Those are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

  On the other hand, as shown in FIG. 4, the gathered nonwoven fabric 15 that forms the three-dimensional gathered BS is a nonwoven fabric made into a double sheet by folding, and the side edges of the absorbent body 13 that is wound up by the liquid-permeable surface sheet 11. The part is further wound up from the upper side and extends to the back surface side of the absorbent body 13 to be bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the middle portion in the longitudinal direction of the paper diaper, and a range from the middle portion in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the front and rear end portions in the longitudinal direction, the section from the intermediate portion in the width direction to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and the portion forming the three-dimensional gather BS is absorbed While being folded at the upper surface portion of 13, it is bonded by a hot melt adhesive or the like.

  In the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, a plurality of thread-like elastic members 16, 16... As shown in FIG. 4 (B), the thread-like elastic members 16, 16... Are for forming a three-dimensional gather BS by raising a non-woven fabric portion protruding from the absorber side edge portion by elastic stretching force. It is.

  The leak-proof sheet 12 enters into the double sheet-like gathered nonwoven fabric 15 and constitutes a leak-proof wall on the lower end side of the three-dimensional gather BS as shown in FIG. As the leak-proof sheet 12, it is desirable to use an opaque sheet so as not to cause browning such as defecation and urine. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the thread-like elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less. In place of the thread-like elastic member, a tape-like elastic member having a certain width may be used.

  In the same manner as the liquid-permeable surface sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is not limited to synthetic fibers such as polyethylene or polypropylene, such as olefins, polyesters, and polyamides, but also regenerated fibers such as rayon and cupra, Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a non-woven fabric with a low basis weight and excellent air permeability. Further, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to improve the feel to the skin (dry feeling), a silicon-based, paraffin-metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

(Structure of exterior sheet 20)
As shown in FIGS. 2 and 5, the exterior sheet 20 is a non-woven sheet having a two-layer structure including an upper layer nonwoven fabric 20A and a lower layer nonwoven fabric 20B, and various elastic members 24 are provided between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B. -29 are provided and the elasticity is provided. In the planar shape, concave notches are formed to form the leg openings 30 on both sides of the middle, forming a pseudo hourglass shape as a whole.

  In the exterior sheet 20 according to the present invention, as the elastic member, as shown in the developed shape shown in FIG. 5, the waist elastic members 24, 24... Disposed in the waist opening 23 and the front body F The back body B has a plurality of waist elastic members 25, 25,... Arranged in the horizontal direction at intervals in the vertical direction, and the leg elastic members 26, 27 for sealing the legs. ..., and elastic members 28, 29, ... for mounting provided on the front body F and the back body B, respectively.

  Hereinafter, the various elastic members will be described in detail.

  The waist elastic members 24, 24... Are vertically spaced in the vicinity of the waist opening edge 23 in the range of the side joint edges 21 and 22 where the front body F and the back body B are joined. It is a plurality of thread rubber-like elastic members arranged, and is for attaching a disposable diaper to the body by applying an expansion / contraction force so as to tighten around the waist of the body. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used.

  The waist elastic members 25, 25... Are thread rubbers arranged in the horizontal direction at intervals in the vertical direction over the range from the upper part to the lower part of the side joint edges 21, 22. A waist elastic shirring is formed on the waist part of the front body F and the back body B to give a stretching force in the horizontal direction, so that the paper diaper is in close contact with the body. The boundary between the waist elastic members 24, 24 ... and the waist elastic members 25, 25 ... is not necessarily clear. For example, among the elastic members arranged in the horizontal direction with an interval in the vertical direction on the front body F and the back body B, even if the number cannot be specified, some on the upper side function as waist elastic members. The remaining elastic members only need to function as waist elastic members.

  The leg elastic members 26, 27,... Are arranged on the front body F side, and the leg elastic members 26, 27 are arranged around the crotch from the joint edge 21 of one front body F to the other front body joint edge. 1 or a plurality of elastic elastic members arranged continuously to the portion 21, and the leg-around elastic members 27 arranged on the back body B side are connected to the crotch portion from the joint edge 22 of one back body B. These are one or a plurality of elastic elastic members that are continuously disposed around the joining edge 22 of the other back body. In the crotch region of the paper diaper, the leg elastic members 26 and the leg elastic members 27 are arranged along the width direction of the paper diaper while approaching without intersecting.

  The mounting elastic members 28, 29,... Extend from the waist opening edge 23 or the vicinity thereof to the crotch side in each of the front body F and the back body B, bypass the crotch side, and bypass the waist opening again. One or more arranged so that the width of the forward curve toward the crotch side and the reverse curve returning from the crotch side gradually narrows from the waist opening edge 23 toward the crotch side while reaching the edge 23 or the vicinity thereof In the illustrated example, there are two elastic members.

  Even when the wearer has weak arm strength or the arm does not turn toward the buttocks, the mounting elastic members 28, 29,... Hold the waist opening 23 as shown in FIG. When pulled up, the acting force from the arm is transmitted to the mounting elastic members 28, 29, and the elastic force can easily lift the diaper, and the diaper can be brought into close contact with the body in the mounted state. .

  Further, the crotch-side detour portions P, P of the mounting elastic members 28, 29, ... are located within ± 100 mm, preferably within ± 50 mm, from the fold line L between the front body F and the back body B. Is desirable. In other words, the relatively heavy absorbent main body 10 can be easily obtained by extending the crotch-side detour portions P of the mounting elastic members 28, 29, etc. to a position near the position of the fold line L. Can be lifted.

  Further, as shown in the figure, the mounting elastic members 28, 29,... Are arranged so as to intersect with the upper and lower edges 10a, 10b of the absorbent main body 10, so that the front body F and the back body B Then, the absorbent main body 10 can be held in close contact with the body. As shown in FIG. 6, the mounting elastic members 28, 29, etc. may be arranged so as to intersect with both side edges 10 c, 10 d of the absorbent main body. In this case, the absorbent main body 10 can be held in close contact with the body, particularly at the crotch.

(Adhesion method of the mounting elastic members 28 ..., 29 ... in the exterior sheet 20)
Next, a method for fixing the various elastic members 24 to 29 on the exterior sheet 20 will be described.

  As shown in FIG. 8, in the exterior sheet 20, the waist elastic members 24, 24... And the waist elastic members 25, 25. The elastic members 24, 24... And the elastic members 25, 25... Are fixed to the exterior sheet 20 by an adhesive, and the mounting elastic members 28. The adhesive applied to the circumferential surfaces of the waist elastic members 24 and the waist elastic members 25 at the intersections with the waist elastic members 24 and the waist elastic members 25 without being applied. It is fixed by.

  On the other hand, in the diaper intermediate zone M other than the waist-shoulder shirring zone K, the mounting elastic members 28, 29, ... are fixed by an adhesive applied to the nonwoven fabric 20A (20B) on at least one side of the exterior sheet 20. Has been.

  That is, in the waist circumference shearing zone K, the hot melt adhesive is applied to the peripheral surfaces of the elastic members 24 and 25 in accordance with a known control seam method for the waist elastic members 24 and the waist elastic members 25. Then, it is fixed by being introduced into the exterior sheet 20, but the mounting elastic members 28, 29, ... are not coated with an adhesive on their peripheral surfaces, and the waist elastic members 24 ... and the waist circumference. When introduced into the exterior sheet 20 together with the elastic members 25 ..., the circumferential surfaces of the waist elastic members 24 ... and waist elastic members 25 ... at the intersections with the waist elastic members 24 ... and waist elastic members 25 ... It is fixed by a hot melt adhesive applied to the surface.

  As a result, as shown in FIG. 8, the elastic members 28, 29, and so on are attached to the waist elastic members only at the intersections (marked portions) with the waist elastic members 24 and the waist elastic members 25. 24 and the waist elastic member 25 (and the exterior sheet 20 due to the spread of the adhesive).

  Therefore, in the front body F and the back body B where the elastic members 24, 25, 28, 29, etc. are densely packed, the amount and range of the adhesive are minimized, thereby preventing the sheet from being cured by the adhesive. Softness can be imparted.

  Specifically, in manufacturing the exterior sheet 20, as shown in FIG. 9, the upper layer nonwoven fabric 20A is supplied to the upper side of the nip roller portion 31, and the lower layer nonwoven fabric 20B is supplied to the lower side. Various elastic members (waist elastic member 24, waist elastic member 25, leg elastic members 26, 27, and mounting elastic members 28, 29, ...) are supplied between the nonwoven fabric 20A and the lower nonwoven fabric 20B. In the process of assembling the exterior sheet 20, the leg elastic members 26, 27, the waist elastic members 24, and the waist elastic members 25. A hot melt adhesive is applied to the peripheral surface and supplied to the nip roller unit 31. Among the elastic members 24 to 27, the leg-around elastic members 26, ..., 27, ... are introduced into the nip roller portion 31 while being meandered in a curved shape by a known traverse device 33.

  For example, as shown in FIG. 10A, the peripheral surface application to the elastic members 24 to 27 is elastic while supplying an adhesive to the bottom of the groove using a member 36 having a V-shaped groove. An application method using a comb gun 35 that passes a member through a groove, an application method using an omega member that applies an adhesive to an elastic member using an omega (Ω) shaped ring member, and as shown in FIG. For example, a conventionally known control seam coating method in which an elastic member is passed through the bending member 37 and an adhesive is applied can be used.

  On the other hand, the mounting elastic members 28, 29,... The traverse device 32 has holding portions of elastic members 28, 29, etc. for mounting at the front end portions, and by causing the continuous web (sheets 20A, 20B) to advance and retreat in the width direction at a calculated speed, The mounting elastic members 28, 29,... Are arranged in a predetermined curved shape. In the present invention, the hot melt adhesive is introduced to the peripheral surface of the elastic members 28, 29,. Then, at the intersections with the waist elastic members 24 and the waist elastic members 25, the waist elastic members 24 and the waist elastic members 25 are fixed by the adhesive applied to the peripheral surfaces.

  Further, a hot melt adhesive is applied to at least one side of the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B, in the illustrated example, a region corresponding to the diaper intermediate zone M other than the waist shirring portion K of the upper layer nonwoven fabric 20A. Curtain coating is performed by the coater 34, and the mounting elastic members 28, 29,... Are fixed in the diaper intermediate zone M by a hot melt adhesive applied to the upper nonwoven fabric 20A.

  Examples of the hot melt adhesive include EVA, adhesive rubber (elastomer), olefin, polyester / polyamide, and the like. In the disposable diaper, the adhesive rubber (elastomer) is used. System).

  By the way, when the mounting elastic members 28, 29, and the leg-surrounding elastic members 26, 27,... Are crossed across the absorbent main body 10, as shown in FIG. , 29..., The contraction force of the leg elastic members 26, 27... Is transmitted to the absorbent main body 10, causing the absorber 13 to contract. In order to cope with this problem, as shown in FIG. 11, the mounting elastic members 28, 29, and leg elastic members 26, 27, etc. on the absorbent main body 10 are cut and the contraction force is absorbed. It is desirable to adopt a method that prevents the main body 10 from being introduced into the sex body 10.

  In order to cut the mounting elastic members 28, 29, and leg elastic members 26, 27, etc. on the absorbent main body 10 and make them discontinuous, JP-A-2002-35029 and JP-A-2002-178428 are disclosed. A cutting method described in Japanese Patent Laid-Open No. 2002-273808 is suitably employed. The elastic elastic member cutting method described in the publication basically has a convex surface as shown in FIGS. 9 (B) and 12 after manufacturing a laminated sheet 20 ′ to be the exterior sheet 20. The laminated sheet 20 ′ is passed between an embossed heat roll 40 in which a plurality of portions are arranged and a counter roll 41 facing the embossed heat roll 40, and elastic members 28 for mounting the laminated sheet 20 ′,. ... and leg elastic members 26, 27 ... are cut by at least one of pressurization and heating between the convex part of the embossed heat roll 40 and the opposing roll 41. Note that the X region in FIG. 9B indicates the cutting range.

  As shown in FIG. 12, the facing roll 41 may be separated from the embossed heat roll 40 so as to contact only the embossed portion 40a of the embossed heat roll 40. As shown in (b), when the embossed portion 40a is lowered, it comes into contact with the opposing roll 41. In addition, on the surface of the embossed portion 40a, small convex portions are further formed in the defining region 40b in a substantially hourglass shape, and in fact, the front end surfaces of these convex portions abut against the opposing roll 41 and are elastic members. Finely cut.

  On the other hand, when the mounting elastic members 28, 29, etc. are fixed to the sheet, a hot melt adhesive is uniformly applied in a curtain shape to the elastic member disposition region on the sheet side, and an elastic elastic member is introduced thereon. In the case of adopting the fixing method, the sheet itself becomes hard due to the hot-melt adhesive and the feeling of wearing becomes worse.In recent years, the adhesive is arranged in a plurality of rows with predetermined intervals. A method of applying and fixing an elastic elastic member has been proposed (hereinafter referred to as a bead application method).

  However, as shown in FIG. 15, when the elastic member is cut on the absorbent main body 10 in order to eliminate the shrinkage of the absorbent body under the condition of using the bead coating method, the elastic member fixing point (fixed) There is a problem that the point lines S) are not aligned and become zigzag. As a result, there are problems such as the loss of fit of the absorbent body and the occurrence of wrinkles in the absorbent body, and the appearance is deteriorated.

Therefore, in the present disposable diaper, each of the mounting elastic members 28..., 29... And the leg-surrounding elastic members 26. , 29 ... and leg elastic members 26 ..., 27 ... fixed point of, in order to align approximately on the same straight line of the diaper longitudinal direction, as shown in FIG. 13, the interval width S ₁ of the adhesive When the mounting elastic member 28 ..., 29 ... (and leg elastic members 26 ..., 27 ...) substantially integral number ratio of the spacing width S ₂ of the adhesive spacing width direction between, on the one time in the illustrated example Is set. Then, since the intersection (circled portion) between the adhesive line and the mounting elastic members 28, 29,... Is restricted to a fixed position in the longitudinal direction of the diaper, the mounting elastic members 28, 29,. If the surrounding elastic members 26, 27,... Are cut on the absorbent main body 10 at line positions along the longitudinal direction of the diaper, the mounting elastic members 28, 29 ... (and the leg elastic members 26, 27 ...). The fixed points are aligned on substantially the same straight line (fixed point line S) in the longitudinal direction of the diaper.

If Shimese some other embodiments, for example, FIG. 14 (A) is said to the interval width S ₁ of the adhesive mounting elastic member 28 ..., 29 ... between the spaced width S ₂ of the adhesive spacing width direction This is an example when the ratio is set to almost double. In addition, the adhesive line is not limited to a linear bead, and as shown in FIG. 14 (B), each adhesive line may be applied in a spiral shape so as to form a plurality of rows as a whole. Alternatively, as shown in FIG. 14 (C), each adhesive line may be applied in a wave shape by summit spraying, and may be applied in a plurality of rows as a whole.

(Assembly procedure for disposable diapers)
As shown in FIG. 2, the absorbent main body 10 and the exterior sheet 20 are integrally bonded to the upper surface side of the exterior sheet 20 by an adhesive such as hot melt. And the absorptive main body 10 and the exterior sheet | seat 20 are folded up in the front-back direction by the fold line L, and the both sides are mutually joined by heat welding or a hot-melt-adhesive, etc., and it assembles into a pants-type paper diaper.

[Other examples]
(1) In the above embodiment, the mounting elastic members 28, 29,... Are arranged on both the front body F and the back body B. However, the mounting elastic members 28, 29, etc. are arranged on one side of the front body F and the back body B. Also good.
(2) In the above embodiment, the exterior sheet 20 includes both the waist elastic members 24, 24 ... and the waist elastic members 25, 25 .... Only one may be provided.
(3) In the above embodiment, when the elastic members 28, 29,... For mounting are cut, the elastic elastic member in a predetermined region is finely cut by the embossed heat roll 40. As described, it may be cut with a roll cutter having linear cutting teeth.

BRIEF DESCRIPTION OF THE DRAWINGS It is a product state external view of the underpants type disposable diaper 1 which concerns on this invention. It is an assembly drawing in the unfolded state. 2 is a plan view of the absorbent main body 10. FIG. (A) is a half cross-sectional view of the absorbent main body 10 in a developed state, and (B) is a diagram showing the product state. FIG. 3 is a development view of the exterior sheet 20. FIG. 6 is a development view of the exterior sheet 20 showing another arrangement mode of the mounting elastic members 28 and 29. It is a figure which shows the attachment point of this underpants type disposable diaper. It is explanatory drawing of the adhering aspect of the elastic member 28 (29) for mounting | wearing of the exterior sheet 20. FIG. The assembling procedure of the exterior sheet 20 is shown, (A) is a schematic view, and (B) is a plan view of the relevant part. It is a figure which shows the example of the application | coating procedure of the adhesive agent in a control seam system. FIG. 6 is a development view of the exterior sheet 20 when the mounting elastic members 28, 29, and leg elastic members 26, 27, etc. are cut on the absorbent main body 10. It is explanatory drawing of the operation | movement aspect of the embossing heat roll 40 and the opposing roll 41. FIG. It is explanatory drawing which shows the cutting method of the elastic elastic members 28 ..., 29 ... for attachment by this invention. (A)-(C) are figures which show the modification of this invention cutting method. It is explanatory drawing which shows the cutting method of the conventional elastic member. It is an expanded view of the conventional pants-type disposable paper diaper (the 1). It is a front view of the conventional underpants type disposable paper diaper (the 2). It is explanatory drawing which shows the state at the time of wear of the conventional underpants type disposable diaper.

  DESCRIPTION OF SYMBOLS 1 ... Paper diaper, 10 ... Absorbent main body, 11 ... Liquid-permeable surface sheet, 12 ... Leak-proof sheet, 13 ... Absorber, 14 ... Crepe paper, 15 ... Gathered nonwoven fabric, 16 ... String-like elastic member, 20 ... Exterior sheet, 21 ... 22 side joint edge, 23 ... waist opening (waist opening edge), 24 ... waist elastic member, 25 ... waist elastic member, 26/27 ... leg elastic member, 28/29 ... for mounting Elastic member, 30 ... Leg opening, F ... Front body, B ... Rear body

Claims (5)

An absorbent main body including an absorbent body and an exterior sheet integrally provided on the outer surface side of the absorbent main body, and the front body and the rear body of the exterior sheet in a product state are joined edges on both side ends thereof In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed by being joined at a part,
The exterior sheet extends to the crotch side starting from the waist opening edge or the vicinity thereof at the front body and / or the back body, bypassing the crotch side and reaching the waist opening edge or the vicinity again, One or a plurality of mounting elastic members arranged so that the width of the forward curve toward the side and the reverse curve returning from the crotch side gradually narrows from the waist opening edge toward the crotch side ,
The exterior sheet has a waist portion elastic member disposed around the waist opening and / or an interval in the vertical direction from one joining edge to the other joining edge in the front body and the back body. A plurality of waist elastic members disposed substantially parallel to each other,
The waist elastic member and / or waist elastic member is fixed to the exterior sheet by an adhesive applied to a peripheral surface of the elastic member, and the mounting elastic member includes at least the waist elastic member and / or In the region where the waist elastic member is disposed, the waist elastic at the intersection with the waist elastic member and / or the waist elastic member without applying an adhesive to the peripheral surface of the mounting elastic member. A pants-type disposable diaper characterized by being fixed by an adhesive applied to a peripheral surface of a member and / or waist elastic member .   The pants-type disposable diaper according to claim 1, wherein the crotch side detour portion of the mounting elastic member is located within a range of ± 100 mm from a fold line between the front body and the back body. The mounting elastic member, pants type disposable diaper according to any one of claims 1-2, which is arranged so as to intersect the upper and lower edge of the absorbent body. The mounting elastic member, pants type disposable diaper according to any one of claims 1-2, which is arranged so as to intersect the side edges of the absorbent body. The mounting elastic member is disposed so as to intersect with both side edges of the absorbent main body, and at least in the transverse region on the absorbent main body, is spaced horizontally with respect to the exterior sheet in the horizontal direction. The adhesive is applied so as to form a plurality of rows along the adhesive, and the ratio of the gap between the adhesives and the gap between the mounting elastic members in the direction of the gap between the adhesives is almost an integral multiple. is set to, and on the absorbent body, the pants-type disposable diaper according to any one of claims 1-2 for mounting the elastic member is discontinuous is cut on the line along the diaper longitudinal direction.

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