WO2007037390A1

WO2007037390A1 - Disposable paper diaper

Info

Publication number: WO2007037390A1
Application number: PCT/JP2006/319499
Authority: WO
Inventors: Hizuru Ono
Original assignee: Daio Paper Corporation
Priority date: 2005-09-30
Filing date: 2006-09-29
Publication date: 2007-04-05
Also published as: JP5057465B2; JPWO2007037390A1

Abstract

[PROBLEMS] To make a waist shirring portion flexible and to firmly bond an elastic stretch member, provided on the waist shirring portion, to an exterior sheet. [MEANS FOR SOLVING PROBLEMS] A disposable paper diaper (1) in which the waist shirring portion is formed of a group of waist elastic stretch members (24..., 25...) that are arranged in a front body (F) and a rear body (B), along the horizontal direction with an interval in the vertical direction. A partial adhesion system in which adhesive is applied to the portions corresponding to the elastic stretch members (24..., 25...) is employed in the front body and rear body regions (K1, K2) where the waist shirring is formed, and a total surface adhesion system in which adhesive is applied to the entire surface of an exterior sheet (20) is employed in a portion (M) other than the regions where the waist shirring (K1, K2) is formed.

Description

Specification

Disposable paper diapers

Technical field

[0001] The present invention relates to a disposable paper diaper in which a waistline shirring is formed by a plurality of waistline elastic elastic members arranged along the horizontal direction at intervals in the vertical direction on the front body and the back body. The present invention relates to a disposable diaper that is used to soften a waist shirring portion that is in direct contact with a person's skin and to firmly fix an elastic elastic member disposed in the waist shearing portion.

Background art

[0002] Conventionally, as a pants-type disposable paper diaper provided in a factory, 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 the product state, the front body and the back body of the exterior sheet are joined on both sides to form a waist opening and a pair of left and right redder openings. The front body and the back body are spaced apart in the vertical direction. A disposable diaper is known in which a waistline shearing is formed by a plurality of waistline elastic stretch members arranged along the horizontal direction. The exterior sheet is provided with stretchability by disposing a large number of elastic stretch members between two non-woven fabric sheets.

[0003] In the past, when the elastic elastic member was fixed to the exterior sheet, the force that was conventionally adhered by applying a hot melt adhesive to the entire surface. The hot melt adhesive solidifies at room temperature. If the seat became hard and felt, the fit was bad.

[0004] In view of such problems, in Patent Document 1 below, in adhering an elastic member between two sheets with an adhesive while sandwiching the elastic member, both sides of the sheet are more than the region corresponding to the center of the pants. Disposable pants with a greater area bond strength are disclosed. Patent Document 1: Japanese Patent No. 2774441

Disclosure of the invention

Problems to be solved by the invention [0005] According to the invention described in Patent Document 1, the outer sheet portion of the crotch portion can surely be softened. However, according to the study by the inventor of the present application, since the absorptive main body is disposed on the inner surface side of the crotch portion, the hardness of the exterior sheet is rather not concerned, and the skin of the wearer We have obtained knowledge that it is more discomforting to the wearer when the waist shirring part that is in direct contact is harder.

[0006] On the other hand, if the amount of adhesive applied is reduced in order to give flexibility to the outer sheet of the waist shirring portion, the elastic stretch member is pulled in due to insufficient adhesive force (part of the elastic stretch member is fixed to the sheet) When the phenomenon of being pulled into the interior) occurs, a new problem has occurred.

[0007] Therefore, the main problem of the present invention is to soften the waist shearing portion that comes into direct contact with the wearer's skin and to firmly fix the elastic elastic member disposed in the waist shearing portion. The present invention provides a disposable paper diaper that is fixed to an exterior sheet.

[0008] In order to solve the above problems, the present invention according to claim 1 includes 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 this state, the front body and the back body of the exterior sheet are joined on both sides to form a waist opening and a pair of left and right redder openings, and are spaced upward and downward from the front body and the back body. In disposable disposable diapers in which waist shirring is formed by a plurality of waist elastic elastic members arranged along the horizontal direction

The front and rear body regions where the waistline shirring is formed have a partial adhesion method in which an adhesive is applied to a portion corresponding to the waistline elastic elastic member, and portions other than the region where the waistline shearling is formed Provides a disposable paper diaper characterized by adopting a full-surface adhesion method in which an adhesive is applied to the entire surface of the exterior sheet.

[0009] In the present invention according to claim 1, the front body and the back body region in which the waistline shirring is formed are coated with an adhesive on a portion corresponding to the waistline elastic elastic member. A part adhesion method is adopted, and a whole surface adhesion method in which an adhesive is applied over the entire surface of the outer sheet other than the region where the waistline shirring is formed is adopted. [0010] By adopting a different bonding method between the waist shirring part and the other parts, it is fixed while adjusting the flexibility in each part of the disposable paper diaper. For parts, the amount of adhesive used is limited by restricting the position where the adhesive is applied to the part corresponding to the elastic expansion / contraction material and adopting a partial adhesion method that prevents the adhesive from being applied between the elastic expansion / contraction members. Since the range is minimized, the outer sheet of the waist shirring part can be softened, and at least the elastic elastic member part can be applied to the tension sheet and the outer sheet by applying an appropriate amount of adhesive. It becomes like this.

[0011] The present invention according to claim 2 includes 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 of the exterior sheet in a product state. A waist opening and a pair of left and right leg openings are formed by joining the body and the back body on both sides, and arranged along the horizontal direction with a space in the vertical direction between the front body and the back body. The waist shirring is formed by a plurality of waist elastic elastic members, and the disposable diaper

The front and back body regions where the waist shirring is formed have a partial adhesion method in which an adhesive is applied to a portion corresponding to the waist elastic elastic member, and an adhesive is applied to the outer sheet with a low weight. It is a combination method of the whole surface adhesion method,

A disposable paper diaper is provided in which a portion other than the region where the waist shirring is formed is a full adhesion method in which an adhesive is applied to the entire exterior sheet with high weight per unit area.

[0012] In the present invention according to claim 2, the adhesive is applied to the portion corresponding to the waist elastic elastic member in the front and back body regions where the waist shearing is formed. This is a combination of a partial adhesion method in which the adhesive is applied and a full adhesion method in which the adhesive is applied to the entire exterior sheet with a low weight per unit area.

[0013] In the waist shearing portion, when the partial adhesion method alone is used, fluffing or opening of the cut occurs at the cut portion of the exterior sheet, and if this becomes a problem, the waist elastic elastic member by the partial adhesion method After sticking to the exterior sheet, apply a small amount of adhesive on the entire surface with low weight to ensure the minimum adhesion to prevent fluffing and opening of the cut. Make sure to secure. It should be noted that the amount of adhesive used per unit area that combines partial adhesion and full surface adhesion in the waist shearing portion should be smaller than the amount of adhesive used per unit area of full adhesion in the crotch region.

[0014] In the present invention according to claim 3, the partial adhesion method is an adhesion method in which the adhesive is applied to a peripheral surface of the waist elastic elastic member and is fixed to the exterior sheet. 2 Discarded disposable diapers as described in one of the above are provided.

[0015] As the present invention according to claim 4, the partial adhesion method is an adhesive applied in a streak pattern along an exterior sheet portion corresponding to an arrangement position of the waist elastic elastic member. The use according to any one of claims 1 and 2, wherein a disposable diaper is provided, which is an adhesive method for adhering to the exterior sheet.

The present invention according to claims 3 and 4 shows a specific example of the partial adhesion method.

[0017] As described above in detail, according to the present invention, the amount and range of adhesive used in the waistline shearing portion that comes into direct contact with the wearer's skin is minimized, so the softness of the sheet is reduced. The elastic elastic member disposed on the waist shirring portion can be firmly fixed to the exterior sheet.

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0019] Fig. 1 is an external view of a disposable diaper 1 according to the present invention in a product state, and Fig. 2 is an expanded view thereof.

[0020] As shown in Fig. 1 and Fig. 2, this pants-type disposable paper diaper 1 (hereinafter simply referred to as a paper diaper) is made of a liquid-permeable surface sheet 11 that has strength such as a non-woven fabric, a protective sheet made of polyethylene and the like. It consists of an absorbent main body 10 with an absorbent body 13 such as cotton pulp interposed between the leakage sheet 12 and an exterior sheet 20 that is integrally provided on the outer surface side of the absorbent main body 10. The pants-type disposable diaper having a structure in which a front opening and a pair of left and right redder openings are formed by joining the front body and the back body of the exterior sheet 20 on both sides. (Structure of absorbent body 10)

First, an example of the structure of the absorbent main body 10 will be described in detail based on FIG. 2 and FIG.

[0021] As described above, the absorbent main body 10 has an absorbent body 13 such as cotton pulp interposed between the liquid-permeable surface sheet 11 that has a force such as a nonwoven fabric and the leak-proof sheet 12 that also has a force such as polyethylene. It has a built-in structure and absorbs and retains body fluids.

[0022] In the illustrated example, the absorbent body 13 is formed so that the planar shape is a substantially square shape, and the width dimension of the absorbent body 13 does not give the wearer a feeling of gooey by hitting the crotch part. It is a width. The absorbent body 13 is surrounded by 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.

[0023] 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 polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, regenerated fibers such as rayon cubra, natural fibers such as cotton, Nonwoven fabrics obtained by appropriate processing methods such as the spunlace method, the spunbond method, the thermal bond method, the melt blown method, and the needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and drape, 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 diffusibility is excellent. The liquid-permeable surface sheet 11 is wound around the side edge of the absorbent body 13 and extends to the back surface side of the absorbent body 13.

[0024] The leakproof sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13 is a force that uses a liquid-impervious plastic sheet such as polyethylene or polypropylene. Those having wettability are preferably used. This water-insulating and moisture-permeable sheet is a microporous material obtained by, for example, forming a sheet by melting and kneading an inorganic filler in polyolefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is a sheet, and if the sheet thickness is the same, the rigidity will be lower than that of a non-porous sheet. It will be superior in terms of sex.

[0025] On the other hand, the gathered nonwoven fabric 15 forming the three-dimensional gathered BS is a nonwoven fabric that is turned into a double sheet by folding, and the side edges of the absorbent body 13 wound by the liquid-permeable surface sheet 11 are further provided. The upper force is also involved and extends to the back side of the absorbent body 13 to be bonded. More specifically, the gathered non-woven fabric 15 has a three-dimensional gather BS formation portion at the middle portion in the longitudinal direction of the paper diaper, and the range from the middle portion in the width direction to the back side of the absorbent body 13 is determined by hot melt adhesive or the like. 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 edge is bonded in the range extending from the back side of the absorbent body 13 and absorbs the portion forming the three-dimensional gather BS While being folded at the upper surface of the body 13, it is adhered with a hot melt adhesive or the like.

[0026] Inside the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, a plurality of thread-like elastic elastic members 16, 16,... The thread-like elastic stretch 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 an elastic stretch force in a product state.

[0027] The leak-proof sheet 12 enters 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 such a leak-proof sheet 12, it is desirable to use an opaque sheet so as not to cause browning such as defecation and urine. For opacification, plastics that are made into a film by adding pigments and fillers such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc, and barium sulfate are preferably used. Is done.

[0028] As the thread-like elastic elastic member 16, a material such as styrene rubber, polyolefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, or the like that is usually used is used. be able to. In order to make it difficult to see from the outside, the thickness should be 925 dtex or less and the tension should be 150-350%. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

[0029] The material fibers constituting the gathered nonwoven fabric 15 are also olefin-based, polyester-based, polyamide-based, such as polyethylene or polypropylene, like the liquid-permeable surface sheet 11. In addition to synthetic fibers such as rayon, recycled fibers such as cucumber, natural fibers such as cotton, etc. were obtained by appropriate processing methods such as the spunbond method, thermal bond method, meltblown method, needle punch method, etc. The ability to use non-woven fabrics In particular, in order to prevent stuffiness, it is recommended to use non-woven fabrics with excellent air permeability by reducing the basis weight. Furthermore, with regard to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to enhance the touch to the skin (dry feeling), a silicone-based, paraffin-metal-based, alkyl-kumick-croid-based It is desirable to use a water repellent nonwoven fabric coated with a water repellent or the like.

[0030] As shown in FIG. 3, the absorbent main body 10 and the exterior sheet 20 are integrally bonded to the upper surface side of the exterior sheet 20 by being bonded with an adhesive such as hot melt. . Then, the absorbent main body 10 and the exterior sheet 20 are folded in the front-rear direction, and both sides thereof are joined to each other by heat welding or hot-melt adhesive, so that the pants-type disposable diaper 1 shown in FIG. Assembled.

[0031] (Structure of exterior sheet 20)

Next, the structure of the exterior sheet 20 will be described in detail based on FIG. 4 and FIG. 4 is a development view of the exterior sheet 20, and FIG. 5 is a view taken along the line V-V in FIG.

The exterior sheet 20 is a two-layer nonwoven fabric sheet in which the upper nonwoven fabric 20A and the lower nonwoven fabric 20B are bonded by a predetermined method, and various elastic elastic members are bonded between the upper nonwoven fabric 20A and the lower nonwoven fabric 20B. Sex has been granted. The planar shape forms a pseudo hourglass shape as a whole by the concave leg-around cut line 29 for forming leg openings on both sides of the middle!

In the exterior sheet 20 according to the present invention, the elastic elastic member is a waist elastic elastic member 24 disposed around the waist opening 23 as shown in the developed shape of FIG.

, 24, and a plurality of waist elastic elastic members arranged on the front body F and the back body B with a space in the vertical direction along the horizontal direction to form a shirring around the waist 25 , 2 5.

[0033] The elastic elastic members 24, 24 ... are spaced apart in the vertical direction near the waist opening edge within the range of the side joint edge 21 where the front body F and the back body B are joined. It is a plurality of elastic rubber elastic members that are arranged around the waist of the body. It is for attaching a disposable diaper to the body by applying an elastic force. As the waist elastic elastic member 24, thread rubber is used in the illustrated example, but a tape-like elastic member may be used, for example.

The waist elastic elastic members 25, 25... Are located at an upper position force lower than the waist opening edge 23 of the side joint edge 21, or as shown, the side joint edge 21. It is an elastic rubber-like elastic elastic member that is arranged along the horizontal direction at intervals in the vertical direction over the range extending to the crotch side, and horizontally on the waist part of the front body F and the back body B, respectively. It is intended to form the waist shirring zone Kl, Κ2 by applying a stretching force in the direction. It should be noted that the boundary between the waist elastic elastic members 24, 24... And the waist elastic elastic members 25, 25. For example, even if the number of elastic elastic members arranged horizontally in the vertical direction between the front body F and the back body heel is not specified, some of the elastic members in the upper part can be specified. The remaining elastic elastic member may function as a waist elastic elastic member 25.

In the disposable diaper 1, various elastic elastic members are bonded to the exterior sheet 20. In the waist shirring zone Kl, Κ 2, the waist elastic elastic members 25 are provided at portions corresponding to the waist elastic elastic members 25. In the crotch part Μ (hereinafter also referred to as “intermediate zone 以外”) other than the waist shirring zone Kl, Κ2, the entire surface where the adhesive is applied to the exterior sheet 20 is adopted. Adhesion method is adopted. In this embodiment, the elastic elastic member is not arranged on the crotch part heel.For example, when the elastic elastic member around the leg is arranged so as to cross the crotch part, the front body and the back body Even when a curved elastic expansion / contraction member is installed that extends from one side of the side edge to be joined to the crotch side and bypasses the crotch part to reach the side edge on the other side, the whole-surface adhesive method is adopted for this crotch part heel Then, the elastic elastic member is fixed to the exterior sheet.

[0036] (External sheet 20 ^ a stand-up procedure)

The assembly procedure of the exterior sheet 20 will be described with reference to FIGS. In the production of the outer sheet 20, the upper layer nonwoven fabric 20A is supplied to the upper force of the top roller part 30 and the lower layer nonwoven fabric 20B is also supplied to the lower side force, and between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B Various elastic elastic members (Waist elastic elastic parts Material 24, waist elastic elastic member 25), the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B are bonded together in the middle zone M, and in the waist shearing zones Kl and Κ2, various kinds of later described It is assembled by partial bonding according to the embodiment. In this way, the amount of adhesive can be adjusted so that the adhesive strength is different by using full bonding in the middle zone 紙 of the paper diaper and partial bonding in the waist wrapping zone Kl, Κ2 of the paper diaper. Like that.

[0037] In the intermediate zone Μ, it is desirable to perform the entire surface bonding with the basis weight of the adhesive being specifically 3 to 20 g / m ² , preferably 5 to L0 g / m ² .

[0038] The method of the whole surface adhesion in the intermediate zone M is to at least one side of the upper nonwoven fabric 20A and the lower nonwoven fabric 20B, in the illustrated example, to the diaper intermediate zone M other than the waistline shearing portion of the upper nonwoven fabric 20A. A hot melt adhesive is curtain-applied to the corresponding region by the coater 32 to bond the upper nonwoven fabric 20A and the lower nonwoven fabric 20B. As the hot melt adhesive, for example, there are various types such as EVA type, adhesive rubber type (elastomer type), olefin type, and polyester / polyamide type. However, when an elastic stretchable member is disposed in the intermediate zone M, the adhesive rubber system (elastomer system) excellent in stretchability is used for the purpose of obtaining adhesive strength while maintaining the stretchability of the elastic stretchable member. Desirable.

Next, the method of partial adhesion in the waistline shearing zones Kl and K2 can be performed based on the following various embodiments.

[0039] (First form of partial adhesion method)

A first embodiment in which an elastic elastic member is fixed to the exterior sheet 20 will be described with reference to FIGS.

[0040] In the waist shearing zones Kl, K2, the waist elastic elastic members 24, 24, and the waist elastic elastic members 25, 25 ··· are the waist elastic elastic members 24, 24 ···. In addition, the adhesive is applied to the peripheral surfaces of the elastic elastic members 25, 25.

[0041] That is, in the waist circumference shearing zone Kl, Κ2, the waist elastic elastic members 25, 25... After the adhesive is applied, it is fixed by being introduced into the exterior sheet 20.

[0042] Application of the peripheral surface to the elastic elastic members 24, 25, 25, for example, using a member 33a having a V-shaped groove, as shown in FIG. Adhesive agent can be applied by applying a comb gun 33 that passes the elastic expansion / contraction member through the groove while supplying the adhesive, or by passing the elastic expansion / contraction member through the bending member 34 as shown in FIG. 8 (B). The coating can be performed by a coating method called omega coating or sure wrap coating. Adhesive application tends to be biased. ヽ Use of omega coating or Sure wrap coating is more preferable than comb gun coating because it allows more uniform coating on the peripheral surface.

[0043] (Second example of partial adhesion method)

A second embodiment in which the elastic elastic members 24... 25 are fixed to the exterior sheet 20 will be described with reference to FIG.

In the second embodiment, instead of the peripheral surface coating device 31, as shown in FIG. 9, at least one of the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B supplied at a predetermined feed rate, In the example shown, an adhesive jet nozzle 35 such as a curtain spray equipped with a slot coat gun and a plurality of linear spray nozzles is disposed on the back side of the upper layer nonwoven fabric 20A, and the adhesive jet nozzle 35 adheres to the upper layer nonwoven fabric 20A. The agent is applied or sprayed to form a streak pattern corresponding to the arrangement position of the elastic elastic members 24, 25, and the elastic elastic members 24 ... 25 ... are introduced and fixed.

[0044] The type of adhesive used in the present embodiment can be the same as that in the first embodiment. The streaky pattern of the adhesive may be formed on both the upper nonwoven fabric 20A and the lower nonwoven fabric 20B.

As described above in detail, in the outer sheet 20, the adhesive is bonded to the entire surface in the intermediate zone M, and the adhesive is partially bonded to the portion corresponding to the elastic expansion / contraction member in the shearing zones Kl and K2, thereby Such an effect can be expected.

[0045] (1) In the shearing zones Kl and K2, the adhesive strength between the elastic stretch member and the upper nonwoven fabric 20A and the lower nonwoven fabric 20B can be maintained as before by the partial adhesion, while an adhesive is provided between the elastic stretch members. It is possible to maintain a soft sensation of touch because no が is applied. (2) The elastic expansion / contraction members 24, 25, 25 are firmly fixed to the exterior sheet 20 by an adhesive applied to the peripheral surface or an adhesive applied in a streak shape, and therefore elastic expansion / contraction Retraction (disengagement) of members 24..., 2 5. Further, since no adhesive is applied between the elastic elastic members 24 ···, 25 ···, the elastic force of the elastic elastic members can be exhibited more effectively.

(3) Applying adhesive to the elastic surface of elastic elastic members 24 ..., 25 ... or exterior sheet 20 in a streak pattern saves the total amount of adhesive and reduces manufacturing costs Expected effects.

(4) Since the adhesive can be prevented from seeping out between the exterior nonwoven fabric sheets 20A and 20B and adhering to equipment and the like, the operability is improved and the manufacturing management burden is reduced.

[0046] (Another example of the waist shirring zone Kl, Κ2 bonding method)

The elastic stretching members 24 ···, 25 ··· are bonded by the first embodiment or the second embodiment above. There is no adhesive between the upper elastic layer 20 Α and the lower elastic layer 20 、 between the elastic elastic members 24 ································· Occurrence may be a problem.

In order to prevent such a non-woven fabric from fluffing and opening, the adhesive is applied only to the portion corresponding to the waist elastic elastic member 25... And the partial adhesion method according to the first embodiment and the second embodiment. In addition, it is desirable to use a whole surface adhesion method in which an adhesive is applied to the exterior sheet 20 with a low weight per unit area. In this case, the whole surface adhesion method should be performed with a low basis weight so as to ensure a minimum adhesion that can prevent fuzzing and opening of the cut. Specifically, 0.3 to 20 g / m ² , preferably 3 to: It is desirable to apply the entire surface of the adhesive with a basis weight of L0 g / m ² , and the partial adhesion and the entire surface in the waist shirring zones Kl and K2 The amount of adhesive used per unit area including the adhesion is set to be smaller than the amount of adhesive used per unit area of the entire surface in the intermediate zone M.

[Another embodiment]

(1) In the above-described embodiment, the waist elastic elastic members 25, 2 5... Arranged on the front body F and the back body B are continuously arranged on the absorbent main body 10 as well. 10 and figure As shown in FIG. 11, the elastic elastic members 25... Crossing the absorbent main body 10 may be cut to be discontinuous. By making the elastic elastic members 25... Discontinuous on the absorbent main body 10, the absorber 13 can be prevented from being contracted.

The discontinuity of the elastic elastic member is, for example, as shown in Japanese Patent Application Laid-Open No. 2000-26015 and Japanese Patent Application Laid-Open No. 2002-273808. According to a method in which an exterior sheet is passed between an anvil roll and an elastic elastic member existing in a predetermined range is cut with a small force by pressing or heating with the above-mentioned emboss cutter roll.

In this case, with respect to the cutting region of the waist elastic elastic members 25, 25,..., The adhesive sheet is not applied to the peripheral surface of the waist elastic elastic members 25, 25,. The adhesive should be applied in a pattern so that it will adhere to the entire surface. As shown in FIG. 12, the adhesive application control is performed by arranging the first coater 32A in the region corresponding to the diaper intermediate zone M and the waist elastic elastic members 25 on both sides thereof. In order to allow the second coater 32B, 32B to be disposed at a position corresponding to the cutting area of the waist elastic elastic member 25, 25 ... A peripheral surface coating device 31 is disposed. Then, the second coater 32B, 32B is used to apply a pattern of an adhesive so that the entire surface of the waist elastic elastic members 25, 25,... The peripheral surface application by the peripheral surface applicator 31 does not apply an adhesive to the portion corresponding to the cutting region of the waist elastic elastic members 25, 25, and applies to other shearing forming portions. The peripheral surface coating device 31 should be controlled to apply the adhesive to the corresponding part.

(2) In the above embodiment, both the waist elastic elastic members 24 and the waist elastic elastic members 25 are fixed to the exterior sheet 20 by a partial adhesion method. The members 24... May be fixed to the exterior sheet 20 by a full adhesion method.

Brief Description of Drawings

FIG. 1 is an external view of a product state of a disposable paper diaper 1 according to the present invention.

[Figure 2] This is a development view.

FIG. 3 is an exploded view of the disposable paper diaper 1. FIG. 4 is a development view of the exterior sheet 20.

FIG. 5 is a view taken along line VV in FIG.

FIG. 6 is a schematic diagram showing the assembly procedure of the exterior sheet 20.

FIG. 7 is a plan view of the relevant part of FIG. 6 (in the direction of arrows B—B).

[Fig. 8] Fig. 8 is a diagram showing an example of the application procedure (A) and (B) of the adhesive according to the first embodiment.

FIG. 9 is a diagram showing an example of how to apply an adhesive according to a second embodiment.

FIG. 10 is a product state external view of a disposable paper diaper 1 according to another embodiment.

FIG. 11 is a development view of the exterior sheet.

FIG. 12 is a diagram showing an adhesive application procedure in that case.

Explanation of symbols

1 ... Disposable paper diaper, 10 ... Absorbent body, 11 ... Liquid-permeable surface sheet, 12 ... Leak-proof sheet, 13 ... Absorber, 14 ... Crepe paper, 15 ... · Gathered nonwoven fabric · · · · · · · · · · · · · · · · · · · · · · · · elastic sheet, 20 · · · exterior sheet, 20A · · · upper layer nonwoven fabric, 20B · · · lower layer nonwoven fabric, 21, 22 · · · side joint edge ··· Elastic elastic member at the waist, 25 · · Elastic elastic member at the waist, 29 · · Cut line around the leg · 30 · · ·-Roller, 31 · · · Comb gun, 32 · · · Coater, F ... Predecessor Around, B ... back body, Kl, Κ2 ... waist shirring zone, Μ ... intermediate zone

Claims

The scope of the claims

[1] An absorbent main body including an absorbent body and an external sheet integrally provided on the outer surface side of the absorbent main body. In the product state, the front body and the back body of the exterior sheet have both sides. Are joined together to form a waist opening and a pair of left and right redder openings, and a plurality of waist elastic stretches arranged in the horizontal direction with a space in the vertical direction between the front body and the back body. In disposable paper diapers where waist shirring is formed by members,

The front and rear body regions where the waistline shirring is formed have a partial adhesion method in which an adhesive is applied to a portion corresponding to the waistline elastic elastic member, and portions other than the region where the waistline shearling is formed Is a disposable paper diaper characterized by adopting an all-surface adhesive method in which an adhesive is applied to the entire exterior sheet.

[2] An absorbent main body including an absorbent body and an external 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 are in both sides in the product state. Are joined together to form a waist opening and a pair of left and right redder openings, and a plurality of waist elastic stretches arranged in the horizontal direction with a space in the vertical direction between the front body and the back body. In disposable paper diapers where waist shirring is formed by members,

A disposable paper diaper characterized in that a portion other than the region where the waist shirring is formed is a full adhesion method in which an adhesive is applied to the exterior sheet with a high weight per unit area.

[3] The partial adhesion method according to any one of claims 1 and 2, wherein the partial adhesion method is an adhesion method in which the adhesive is applied to a peripheral surface of the waist elastic elastic member and is fixed to the exterior sheet. Disposable paper diapers.

[4] The partial adhesion method is such that the adhesive is applied to the exterior sheet by an adhesive applied in a streak pattern along the exterior sheet portion corresponding to the position where the waist elastic elastic member is disposed. The disposable paper diaper according to claim 1, wherein the disposable diaper is an adhesive method for fixing.