JP2002178428A - Method for manufacturing stretchable sheet and paper diaper using the stretchable sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to cut a stretchable member free from sheet rupture and improve air permeability. SOLUTION: A laminate 940 formed by inserting a single stretchable member 920 or a plurality of stretchable members 920, in a stretched state, between an upper and a lower sheet 910 and 930, is introduced into a nip between a first roll 950 with a plurality of cutting projecting parts 951 arranged at an interval on the surface and a second roll 960 with recessed parts 961 with which the cutting projecting parts 951 are interlocked. In this case, the cutting projecting parts 951 are thrust into the parts of the laminate 940 which are scheduled to correspond to an absorber. Thus the stretchable member 920 of the parts scheduled to correspond to the absorber, is cut and the parts are perforated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a stretchable sheet by attaching a stretchable member made of an elastic material such as thread rubber to a sheet such as a nonwoven fabric or a plastic film, and a stretchable sheet manufactured by this method. The present invention relates to a disposable diaper using a sheet.

[0002]

2. Description of the Related Art Disposable wearing articles such as disposable diapers and disposable pants are required to be stretchable around a waist, around a leg, around a torso, etc. in order to improve the adhesion to a wearer. . It is also conceivable to use a woven fabric (stretch fabric) that has the elasticity of the material itself,
It is costly to use for disposable wear articles. For this reason, usually, a thread-like or band-like stretchable member is adhered to a nonwoven fabric or a plastic film in an extended state, and these non-stretchable sheets can be stretched.

[0003] In order to continuously manufacture such an elastic sheet, a non-elastic sheet is pulled out of a roll and stretched under a predetermined tension while the non-elastic sheet is being pulled out from a roll and run. Is adopted. However, due to the shape of the disposable wearing article or the convenience of cutting into individual products, it is sometimes necessary to intermittently provide a portion that does not need to be expanded and contracted and an elastic portion in the running direction of the seat.

[0004] It is conceivable to attach the stretchable member to the sheet without applying tension to a portion that does not need to be expanded or contracted. However, it is possible to quickly switch between a state in which tension is applied and pulled and a state in which no tension is applied. Are difficult to manufacture.

[0005] Therefore, usually, an adhesive is intermittently applied to a sheet, and an adhesive-applied portion and a non-applied portion are alternately provided on the sheet along the sheet traveling direction. Is cut off to provide a non-stretchable portion. In the adhesive non-applied portion, the elastic member is not adhered to the sheet, so the elastic member cut at one point is pulled toward the elastic member adhered to the sheet, relaxes, and stays there. .

[0006] As a method for cutting the elastic member, a first roll having a continuous linear convex portion (single blade) continuous in the roll width direction is provided between a first roll and a second roll facing the first roll. There is a type in which a sheet on which an elastic member is arranged is passed and the elastic member is cut by pressurization or heating by a linear convex portion of a first roll.

[0007]

However, in this conventional method, since a cutting force is applied in a continuous line along the roll width direction, when a cutting force is applied to a portion where no elastic member exists, In some cases, the sheet was broken. In addition, even if the sheet does not break, the sheet of non-woven fabric or the like is formed into a film by thermocompression bonding, so a single seal line with a hard touch will remain across the part where the elastic member does not exist. When you look good,
There was a problem that both of the wearing feelings became insufficient.

On the other hand, when such an elastic sheet is used as an outer sheet of a paper diaper in order to impart elasticity to the disposable diaper, it is desirable that the air permeability is good. .

Accordingly, a main object of the present invention is to enable cutting of an elastic member and processing for improving air permeability without fear of sheet breakage.

[0010]

The present invention which has solved the above-mentioned problems is as follows. <Invention according to claim 1> On a sheet or between upper and lower sheets, one or a plurality of elastic members such as a thread, a net, and a belt are arranged in an extended state to form a laminate, and a plurality of cutting protrusions are formed on the surface. A first roll in which a plurality of rolls are arranged at an interval and a second roll having a concave portion into which the cutting convex portion is inserted are arranged to face each other, and the laminate is passed between the two rolls. A method for manufacturing a stretchable sheet, wherein at least one of cutting the stretchable member and forming a hole in the laminate is performed by piercing the cutting protrusion into a body.

<Operation> In the present invention, a plurality of cutting projections arranged at intervals are pierced into the laminated body, and at least one of cutting the elastic member and forming a hole in the laminated body (that is, both or either). I do. Therefore, in the processing, no cutting force acts between the convex portions and no cutting force acts in a continuous line along the roll width direction. However, there is no risk of sheet breakage (cutting of the entire roll width direction). When the elastic member is cut, the elastic member can be more reliably cut because the cutting protrusion is pierced into the laminate, and when a hole is formed in the laminate, the air permeability is increased by the hole. improves. As a matter of course, when both the cutting and the hole formation of the elastic member are performed, both effects can be obtained.

<Invention of claim 2> The method of manufacturing an elastic sheet according to claim 1, wherein both the cutting of the elastic member and the formation of a hole in the laminate are performed by piercing the cutting convex portion.

<Operation> According to the second aspect of the present invention, it is possible to more reliably cut the elastic member without fear of the sheet breaking, and at the same time, it is possible to improve the air permeability by forming a hole.

<Invention of claim 3> The method of manufacturing a stretchable sheet according to claim 1, wherein holes are formed in the laminate by cutting the stretchable member without cutting the stretchable member.

<Operation> According to the third aspect of the invention, it is possible to improve the air permeability by forming the holes without fear of the sheet being broken.

<Invention according to claim 4> The roll according to any one of claims 1 to 3, wherein the first roll is a roll having a cutting convex portion having an area of a base end face piercing the laminated body of 0.01 cm ² or more. A method for producing a stretchable sheet according to any one of the preceding claims.

<Function> When a hole is formed, the area of the opening on the first roll side of the hole is assured to be about 0.01 cm, and the air permeability is good.

<Invention according to claim 5> As the first roll, a roll in which a plurality of the cutting protrusions are arranged in a staggered manner at a pitch of 1 to 25 mm in the axial direction and the circumferential direction of the roll is used. A method for producing a stretchable sheet according to claim 1.

<Operation> When holes are formed by the cutting protrusions arranged in a staggered pattern at such a pitch, more reliable cutting can be performed when cutting the elastic member, and when the holes are formed, good air permeability is obtained. Becomes In addition, since the cutting force does not act on the elastic members other than the convex portions, there is a portion where the elastic member in the roll axis direction is not cut and a cut portion, and the retracting by cutting the elastic member is partial. Thus, a sheet having less foreign matter feeling and good mounting properties is obtained.

<Invention of Claim 6> The first roll has a cutting protrusion in the shape of a circular pin, a circle, an ellipse, or a star, or a polygonal pin such as a triangle, a square, or a polygon. The method for producing a stretchable sheet according to any one of claims 1 to 5, wherein a roll is used.

<Function> By using such a pin-shaped cutting projection, the possibility of sheet breakage is further reduced. Of course, the “polygon” in the present invention includes not only a pentagon, a hexagon, or a polygon having more corners, but also a triangle and a quadrangle.

<Invention according to claim 7> When a stretchable member is arranged between the upper and lower sheets in a stretched state to form a laminate, an adhesive is applied to at least one of the upper and lower sheets, and the stretchable member is attached. The method for producing a stretchable sheet according to claim 1, wherein the stretchable sheet is adhered by being sandwiched between the upper and lower sheets.

<Function> The same function and effect as the first aspect of the invention can be obtained even in a mode in which the laminate is sandwiched between the upper and lower sheets.

<Invention according to claim 8> The adhesive is applied to at least one of the sheet and the elastic member continuously or discontinuously in the longitudinal direction, or entirely except for part, all or part. The method for producing a stretchable sheet according to any one of claims 1 to 7, wherein the stretchable sheet is coated.

<Operation> The same operation and effect as described above can be obtained by any of these adhesive application forms. In particular, the method of discontinuous coating along the longitudinal direction is suitable for a case where a stretchable sheet having a non-stretchable portion and a stretchable portion is continuously manufactured. In addition, the same operation and effect as described above can be obtained.

<Invention of claim 9> The manufacturing of the stretchable sheet according to any one of claims 1 to 8, wherein the whole or a part of the stretchable member is cut by piercing the cutting convex portion. Method.

<Operation> Even when all or a part of the elastic member is cut, the same operation and effect as described above can be obtained.

<Invention according to claim 10> The stretchable sheet produced by the method according to any one of claims 1 to 9 is attached to a stretchable portion.
Paper diapers.

<Operation> The tenth aspect of the present invention is a disposable diaper to which a stretchable sheet produced by the method according to any one of the first to ninth aspects is applied. When a sheet obtained by cutting the elastic member is used, no shrinkage occurs at the cut portion and the appearance is improved as a neat shape, and when a sheet having holes is used, the air permeability becomes good. Further, when a sheet in which the elastic member is cut and a hole is formed is used, both effects can be obtained.

<Invention according to claim 11> In the state of use, both side edges of the front body and the back body of the outer sheet are joined to form a waist opening and left and right leg openings,
And in a disposable diaper having an absorbent core in the center,

The stretchable sheet portion manufactured by cutting at least the stretchable member by the method according to any one of claims 1 to 9 is provided so that the stretchable direction is at least one of the front body and the back body in the circumferential direction. Along with preparing so that the cutting part is located along the center,

[0032] A disposable diaper characterized in that the crotch-side end of the outer sheet is formed within 5 mm from the crotch-side end of the absorbent core.

<Operation> In the disposable diaper of the present invention, the stretchable sheet portion of the present invention is provided with the direction of expansion and contraction along the circumferential direction and the cut portion is aligned with the center portion. Will be refreshing. Further, since the crotch-side end of the outer sheet is formed so as to be located within 5 mm from the crotch-side end of the absorbent core, the outer sheet hardly protrudes from the side of the absorbent core, and the crotch has a voluminous feel. The feeling is reduced and the appearance is refreshing. As a result, the entire disposable diaper has a very clean appearance. The present invention includes both a form in which the outer sheet itself is formed of the stretch sheet of the present invention and a form in which another stretch sheet of the present invention is attached to the outer sheet.

[0034]

Embodiments of the present invention will be described below in detail with reference to the drawings. <Embodiment of Method for Manufacturing Stretchable Sheet> FIG. 1 is a perspective explanatory view showing an example of a method for manufacturing a stretchable sheet according to the first embodiment of the present invention. The direction of the arrow is the seat traveling direction.

A belt-shaped lower sheet 910 having a predetermined width is applied to an adhesive applying section 9 by a hot melt adhesive applying machine (not shown).
11 and the non-coating portion 912 are provided alternately, and run from the right side to the left side in the drawing. In the present invention, as shown in FIG. 2, the adhesive 912 can be applied continuously in the sheet longitudinal direction.

The plurality of elastic members 920 are attached to the lower sheet 910 while being guided by the guide 921 in a state where a predetermined tension is applied by being pulled out from the elastic member roll and passing through the tension roll. Be worn. At this time, the upper sheet 930 and the lower sheet 9
10, the elastic member 920 is sandwiched between the
1 and 932, these are pressed, and the upper sheet 930, the lower sheet 910, and the elastic member 920 are bonded in the adhesive application section 911. Thus, the laminate 40 in which the elastic member 920 is sandwiched between the upper and lower sheets 930 and 910 is formed.

Subsequently, the laminated body 940 includes a first roll 950 having a plurality of cut protrusions 951 arranged on the surface at intervals, and a second roll having a concave portion 961 into which the cut protrusion 951 is inserted. 960, and at that time, the cutting protrusion 951 is pierced into the laminate 940, thereby cutting the elastic member 920 and forming a hole in the laminate.

In this embodiment, the first roll 950 is provided in a part of the circumferential direction of the elastic member 920 so as to cut the elastic member 920 and form the hole X at appropriate intervals in the transport direction of the laminated body 940. The second roll 96 only on the overhang surface 952
No. 0 is formed so as to be in contact with the outer peripheral surface, and a cutting convex portion 951 is formed only on the overhang surface 952. Therefore, as shown in FIG. 3A, in a state where the overhang surface 952 is not opposed to the second roll, the first and second rolls are separated from each other, and the cutting of the elastic member and the formation of holes are not performed. When the overhang surface 952 comes to a position facing the second roll as shown in FIG. 3B by the rotation of both rolls, the overhang surface 952 of the first roll 950 comes into contact with the second roll, In this case, as shown in FIG.
52, the cutting projection 951 is pierced into the laminate 940,
The elastic member 920 is cut and the hole X is formed. At this time, if the concave base portion 962 of the second roll is formed in a tapered shape whose diameter increases toward the opening side as shown in the drawing, there is an advantage that the hole can be formed more reliably and neatly. In the example shown in FIG. 1, the circumferential length L ₂ of the overhanging surface is formed to be slightly shorter than the length L _{1 of} the adhesive non-applied portion 912, and the overhanging surface 952 is formed on the adhesive non-applied portion 912. The coating interval, the circumference of the first roll 950, and the traveling speed are set so as to be in contact with each other.

The hole X to be formed may be a through hole X1 penetrating to the back surface as shown in FIG. 5A, or a non-penetrating hole as shown in FIG. 5B. It may be a hollow X2. It is recommended that the depth of the hollow X2 be 30% or more, preferably 50% or more, more preferably 70% or more with respect to the thickness of the laminate. By making the hollows 30% or more with respect to the thickness of the laminated body 940, unlike the conventional embossing treatment such as diamond embossing, the air permeability becomes remarkable in terms of functionality. The hole shape is preferably a circular shape, but may be a polygonal shape such as a star shape, a triangular shape, or a square shape.

In practice, a clear through-hole X2 or a hollow X2 may not be formed due to the restoring force of the fiber.
As shown in an experimental example described later, by performing such a hole processing, air permeability can be clearly expressed. The hole processing is performed at a pitch of 1 to 25 mm, and the hole area is desirably 0.01 mm ² or more on the laminate surface.

On the other hand, the cutting protrusion 95 of the first roll 950
As shown in FIG. 6, the shape of 1 is (A) a conical pin shape 951, (B) a polygonal pyramid pin shape 951 ', and (C) a linear convex portion 951' having a linear blade portion C at the tip. Any shape can be used as long as it can penetrate the laminate, such as'. Further, as shown in FIG. 4, the cutting convex portion 951 is formed such that the area of the piercing base end surface 951S is equal to a desired hole area.

The cutting projections 951 are arranged in a matrix.
It is possible to cut the elastic member more securely.
Are preferably arranged in a staggered pattern as shown in FIG. This
, The axial and circumferential pitches M and D of the roll are
Equal to the desired hole pitch. Note that the projections in one row
The number 951 is appropriately set according to the number of elastic members to be cut and the like.
It is good to set. The number of rows in the roll axis direction of the convex portion 951 is
Length L of non-coated part ₁Can be set appropriately according to
come. In particular, the convex portions 951, 9 in each roll axial direction row
51 are arranged in the front and rear rows in the circumferential direction.
The size and arrangement of the convex portions 951 are set so that
In this case, the elastic member 920 is cut off.
There is virtually no loss.

FIG. 8 shows a more detailed cutting mode when the staggered arrangement is adopted. In the figure, it is assumed that the laminate is running downward. Reference numeral 911 denotes an adhesive application portion, and 912 denotes an adhesive non-application portion. Left elastic member 9
22 is cut at the nearest seal portion 970 (corresponding to the convex portion 953), and its end 922a is released from the tension state and contracts toward the elastic member 922 joined and fixed to the sheet. . If the remaining elastic member is supplemented by the convex portion 55 before the cutting by the convex portion 953 is completed, the elastic member 92 between the convex portion 953 and the convex portion 955 is provided.
2b contracts toward the seal portion 72 when cut by the convex portion 953. If the cutting by the convex portion 953 is completed before the remaining elastic member is captured by the convex portion 955,
It contracts toward the elastic member (not shown) existing in the downstream adhesive application section. In addition, the right elastic member 923 is also cut at the nearest seal portion 971 (corresponding to the convex portion 954), and the end 923a is contracted.

In the stretchable sheet thus formed, not only the stretchable member can be reliably cut by the penetration of the cutting protrusion, but also a good air permeability can be obtained by forming a penetrating or hollow hole. .

On the other hand, in the present invention, the following modifications (a) to (h) are possible. (A) At least one of the first and second rolls 950 and 960 may be provided with a heating means so as to melt the elastic member and seal the upper and lower sheets. Specifically, a rod-shaped sheathed heater may be provided near these rolls, or another heating means such as a high-frequency heating means, a far-infrared heater, or an oil heater may be used in combination.
However, since the present invention uses cutting projections such as pins and blades, the elastic member can be cut only by light pressure, and in this case, flexible elasticity without heat sealing of the upper and lower sheets. Sheets can be manufactured. In FIG. 1, a configuration in which the positions of the first roll 950 and the second roll 960 are reversed may be employed.

(B) As the lower sheet 910 and the upper sheet 930, non-woven fabric, plastic film, knitted fabric, woven fabric,
Paper or the like can be used. As the material, known materials such as polypropylene, polyethylene, polyester, cellulose, and rayon can be used alone or in combination of two or more.

(C) Each of the sheets 910 and 930 may be a multilayer sheet in which some sheets are already laminated.

(D) As the elastic member of the present invention, a cuttable material (for example, thermoplastic polyurethane, various elastomers, rubbers, etc.), for example, a thread, a band, or a net can be used. In the above example, the elastic members are attached in parallel in a plurality of directions. However, in the present invention, only one elastic member can be attached.

(E) Although FIG. 1 shows an example in which the elastic member is bonded to the central portion in the width direction of the sheet, a structure in which the elastic member is bonded to the vicinity of the end of the sheet may of course be used. What is necessary is just to change the arrangement | positioning part of an embossing pattern according to the attachment position of an expansion-contraction member.

(F) The adhesive of the present invention can be applied to one or both of the upper and lower sheets. Further, an adhesive can be applied to the elastic member. Further, the adhesive may be applied to the sheet or the like discontinuously (see FIG. 1) or continuous (see FIG. 2) along the longitudinal direction, or partially, entirely or partially except for the whole. it can.

(G) As shown in FIG. 9, the cut portion in the present invention may be the adhesive applied portion X or the adhesive non-applied portion Y.

(H) In the above-described example, the form in which the elastic member is sandwiched between the pair of upper and lower sheets is shown. However, as shown in FIG.
The method for cutting an elastic member according to the present invention can be applied to a case where the elastic member is arranged and fixed on a single sheet or a multilayer sheet.

(I) In the above example, the elastic member is cut, but in the present invention, the arrangement of the cutting projections is changed to form only the holes in the laminate without cutting the elastic member, and the air permeability is reduced. Only improvement can be achieved.

Next, an example of application to a disposable diaper will be described in detail by first taking an example of a pants-type disposable diaper.
When using the diaper (when wearing), bring the left and right side edges of the back to the left and right side edges of the abdomen, and use these as tape fasteners (including adhesive tape fasteners and hook-and-loop fasteners)
An example of application to a so-called tape-type disposable diaper of the type which is joined by means of a tape will also be described.

<Explanation of Terms of the Present Invention and First Embodiment of Pants-Type Disposable Diaper> Mainly referring to FIG. 10, terms relating to parts and directions of the present invention will be explained while referring to FIGS.
13 describes the pants-type disposable diaper according to the first embodiment. The pants-type disposable diaper according to the first embodiment is, as shown in FIGS. 10 and 11, a flexible outer sheet 1 and fixed to the inner surface of the outer sheet 1, and a longitudinal direction ( (Front-back direction).

The outer sheet 1 is formed by laminating and fixing two or more air-permeable and water-repellent nonwoven fabrics. At the final stage of the manufacturing process after the outer sheet 1 and the absorbent main body 10 are overlaid, By joining the entire longitudinal direction of both side edges of the body F and the back body B by means such as ultrasonic sealing or heat melting (this joint is denoted by reference numeral 30), FIG.
As shown in FIG. 3, a waist opening WO and a pair of left and right leg openings LO are formed.

In the reference numeral in FIG. 10, "vertical direction" means
It refers to the direction connecting the ventral side and the dorsal side, and the "circumferential direction" refers to the direction orthogonal to the longitudinal direction. "Waist opening edge" means the edge of the waist opening WO, and "leg opening edge"
Means the edge of the leg opening LO. The “leg opening start end” refers to the leg opening edge of the leg opening LO and the joint 30.
, Which means the beginning of the leg opening edge. "Waist circumference" T means the entire area of the length range from the waist opening edge to the leg opening start end.
The waist portion T is conceptually “waist portion” W and “lower waist portion”
U and U. These vertical lengths are
Depending on the size of the product, the waist W is 15 ~
40 mm, the lower waist U is 45 to 120 mm. "Crotch" L means the entire region of the length range forming leg opening LO. The “central portion” means an intermediate region excluding a side portion including the center line of the product. The “side portions” mean both side portions of the waist portion T.

As shown in FIG. 12, the absorption main body 10
A rectangular liquid-permeable topsheet 11 made of non-woven fabric or the like and directly touching the wearer's skin, and a rectangular absorbent core 13 made of cotton-like pulp and having a certain degree of rigidity (semi-rigidity)
And a rectangular liquid-impervious bag made of a polyethylene plastic film or the like reaching the vicinity of both side edges on the back surface of the absorber AB. The liquid-permeable topsheet 11 has both sides of the absorber AB, reaches the back surface, and is superimposed on the liquid-impermeable backsheet 12, and each of these elements is hot-melt. It is integrated by an adhesive (the bonding portion is indicated by * in the figure). If necessary, a liquid-permeable second sheet 11S can be interposed between the liquid-permeable topsheet 11 and the crepe paper 14 as shown. Almost the entire back surface of the absorbent main body 10 is adhered to the outer sheet 1 with a hot melt adhesive to be integrated.

On both sides of the absorbent main body 10, leg-surrounding cuffs C, C protruding toward the use surface side are formed, respectively. It is constituted by a member, for example, one elastic member made of thread rubber or a plurality of elastic members 50 as shown in the drawing.

More specifically, the upright cuff C is formed by doubling the upright sheet 40 and wrapping the stretchable members 50, 50 ... in a state where they are fixed with a hot melt adhesive or the like. The upright sheet 40 forming each of the upright cuffs C, C is desirably not liquid-permeable but liquid-impermeable or hydrophobic. For this reason, another sheet (film, nonwoven fabric, or the like) may be stuck to the inner surface of the upright sheet 40 to improve the leakage prevention. Alternatively, the liquid-permeable sheet such as a nonwoven fabric may be made to have a property of repelling liquid by a silicon treatment or the like. Further, it is desirable to have ventilation or vapor permeability.

The inner surface of the double upright sheet 40 is provided with an absorber A
B and the back surface side of the liquid-impermeable back sheet 12 are fixed by a hot melt adhesive or the like. As a result, this fixed starting end of the double upright sheet 40 forms the upright end of the upright cuff C.

The tip side from the upright end is a free portion that is not fixed to the product body.

On the other hand, at the front and rear ends in the longitudinal direction, the free portion is fixed to the article, specifically to the outer surface of the liquid-permeable sheet 1, with the front end directed toward the center of the article by hot melt adhesive or the like. Have been.

.. Have a basic structure in which at least one of them is at the free portion. In particular, it is preferable that the expandable member 50 is at the tip of the free portion. , It is preferable to have the elastic member 50 also on the root side. At the tip,
It is more desirable to have a plurality as shown.

FIG. 11 shows a state in which the disposable diaper is developed in the longitudinal direction. At the time of attachment, the disposable diaper is attached to the body in a boat shape, and the contracting force of each of the elastic members 50 acts. The upright cuffs C stand up around the legs due to the contraction force of the elastic members 50, 50. At this time, the side portion of the absorption main body 10 is deformed and lifted, and the absorber 3 is also lifted while being slightly deformed to form a deep pocket space.

The space surrounded by the left and right standing cuffs C, C forms a space for confining urine or loose stool. When urine is discharged into this space, the urine is absorbed into the absorbent element AB through the liquid-permeable top sheet 1, and the raised cuff C serves as a barrier for loose stool solids, preventing the stool from climbing over. Is done.

On the other hand, at the longitudinal ends of the front body F and the back body B, between the nonwoven fabrics of the outer sheet 1 at the waist W, in order to improve the fit around the waist,
Waist elastic members 20F and 20B made of thin thread rubber are arranged and fixed so as to extend and contract at intervals in parallel with the edge of the waist opening WO. The interval and the number of the waist elastic members 20F and 20B in the waist portion W can be appropriately determined.
８8 mm, and the number is preferably about 4-10.

Further, in this embodiment, the lower waist U which is an area between the waist portion W and the crotch portion L of the front body F and the back body B is provided.
In the lower abdomen of the front body F and the buttocks of the back body B, lower back elastic members 21F and 21B are provided along the circumferential direction. And the lower back elastic member 21F of the front body F is
A portion corresponding to almost the entirety of the absorbent core 13 among the portions from the joint portion 30 on one side to the joint portion 30 on the other side is discontinuous, and is provided continuously on the left and right side portions of the product except for the central portion. I have. The lower back elastic member 21B of the back body F is provided continuously across the absorbent core 13 from the joint 30 on one side to the joint 30 on the other side.

The lower waist elastic members 21F and 21B are preferably made of thin thread rubber, specifically 620 dt thick.
ex or less, and the vertical interval is set to 7.0 mm or less in both the front body F and the back body B, and 15 to 40 pieces are arranged in parallel between the nonwoven fabrics of the outer sheet 1. Fixed. This lower back elastic member 2
The interval between 1F and 21B is the waist elastic member 20.
It is desirable that the distance between F and 20B be the same or shorter.

The thread rubber used as the lower waist elastic members 21F and 21B has a smaller extension stress and a smaller outer diameter than the thin thread rubber used as the aforementioned waist elastic member 20, or is substantially the same. can do. Specifically, the thin thread rubber used here has an extension stress of 4 to 17 at 150% elongation.
g, particularly in the range of 5 to 10 g, is preferably used.

In the first embodiment, the central portion corresponding to the absorbent core 13 is also discontinuous with respect to the front body F portion of the crotch portion L, and the left and right side portions excluding the central portion extend in the circumferential direction. A continuous crotch elastic member 23 is provided. Regarding the crotch elastic member 23, the lower waist elastic members 21F, 21F
Similarly to B, an elastic member having a thickness of 620 dtex or less can be arranged and fixed between the nonwoven fabrics with a vertical interval of 7.0 mm or less.

In particular, in the present embodiment, the lower waist and crotch elastic members 21F, 21B, 23F and 23B are respectively 2-3 cm before and after the crotch 4 in the crotch L (4 to 6 cm in total), especially 4 cm.
It is provided except for a length range R of ６6 cm (8 to 12 cm in total).

In the first embodiment, the lower-hip lower back elastic member 21F and the surplus lower back elastic member 21F in the front body F described above are subjected to the elastic member cutting and hole forming processing of a predetermined portion of the external sheet 1 according to the present invention. A central discontinuous portion of the part elastic member 23F and a hole X are formed. That is, the first
In the embodiment, the outer sheet itself formed by sandwiching an elastic member between the nonwoven fabrics corresponds to the elastic sheet of the present invention.

In the diaper thus formed, as shown in FIG.
Absorbing core 13 in 1F and surplus portion elastic member 23F
Is formed discontinuously, the lower waist elastic members 21F, 21F are not continuous across the absorbent core in the front body F, and the contraction force of the absorbent core 13 in the direction of tightening the waist around the absorbent core 13 is weakened. Wrinkles and the resulting reduction in absorption performance are prevented. In addition, since a large number of holes are formed in the outer sheet, good air permeability is obtained. On the other hand, in the back body B, the lower back elastic member 21B
Are continuously arranged from the joint portion 30 on one side to the joint portion 30 on the other side, so that slippage prevention and adhesion to the skin are enhanced. Further, since the lower waist elastic members 21F and 21F in the front body F have almost no wrinkles at discontinuous portions, the adhesion to the pants worn from above becomes good, and the appearance becomes clear and good.

Although not shown, the lower waist elastic members 21F, 21F of the present invention include the entirety of the absorbent core 13 in the portion from the joint 30 on one side to the joint 30 on the other side in the front body F. Can be formed discontinuously, and in this case, the same operation and effect as described above can be obtained.

Further, in the above example, the cutting and forming of the elastic member according to the present invention is applied to the lower waist elastic portion and the crotch expanding and contracting portion. The present invention can be applied to a portion to be provided (for example, a waist elastic portion or a leg elastic portion as in a fourth embodiment described later).

<Second embodiment of pants-type disposable diaper and example of manufacturing method thereof> Next, a second embodiment in which a separate elastic sheet is attached to an outer sheet will be described together with an example of its manufacturing method. I will elaborate. FIG.
1 shows an assembling flow of a pants-type disposable diaper according to the present invention, and is composed of an absorption-based production / supply line 100, an outer sheet production / supply / production line 200, and a final processing line 300.

In the absorption-based production / supply line 100, the absorbent core is first supplied so that the longitudinal direction thereof is along the transporting direction, and a liquid-permeable top sheet is covered thereon and fixed. Upright cuffs are respectively arranged and fixed to both side ends of the top sheet. Next, these are arranged and fixed on a separately supplied liquid-impermeable backsheet, and the absorption main body 10 is completed. In the case of this example, the liquid-impervious back sheet is folded back in advance on both sides and bonded with a reinforcing member such as a colored urethane film sandwiched therebetween, and processed so as to strengthen the stiffness of the edge. (The side edges may be emphasized or stiffened by color hot melt bonding without using a reinforcing member.)

The absorption main body 10 thus manufactured is 90
In the turn device 110, the sheet is turned 90 degrees in a plane such that the longitudinal direction thereof is orthogonal to the conveying direction, and the outer sheet mounting device 301 of the final line 300 is turned.
Transported to

On the other hand, in the outer sheet manufacturing / supplying / manufacturing line 200, the surplus elastic member, the elastic sheet forming the lower waist elastic member, and the waist elastic member are attached to the belt-shaped outer sheet 201 continuous in the product width direction. Done.

In detail, the belt-shaped outer sheet 201 is first sent to the slip cutter device 210. In the slip cutter device 210, the separately supplied design sheet 202 is slipped and sequentially cut into a predetermined shape while keeping a supply interval, and as shown in FIGS. 16 and 17, the cut design sheet 202 is also cut. 202 are arranged and fixed to the center of the front body width direction and the center of the back body width direction on the upper surface of the belt-shaped outer sheet 201 by hot melt bonding or the like. As the design sheet, a film or the like made of an impermeable material with a picture or the like can be used. In addition, the design sheet can be provided with a design such as a character on the outer surface. This design portion has an absorbent core 13 having a certain degree of rigidity, and since the outer sheet 1 is not deformed or wrinkled according to the present invention, the design is clearly understood without collapse. Becomes
The design sheet 100 can be interposed between the outer sheets. Further, it can be printed on the outer sheet 1 or on the back side of the liquid-impermeable back sheet 12. Further, as shown, corresponding to the front and back of the product,
By applying the front and back of the character, anyone can determine the front and back at a glance, making diaper changing fun and the wearer happy.

Subsequently, the front body elastic sheet and the rear body elastic sheet are supplied from the elastic member supply line 230 and attached to the outer sheet 201.
For this reason, in this example, the upper and lower sheets 91 are provided in the elastic member supply line 230 by the manufacturing method of the present invention described above.
A first roll 950 in which a plurality of cutting protrusions 951 are arranged at intervals on a surface of a laminated body 940 formed by sandwiching one or more elastic members 920 in an extended state between 0,930 and a cutting protrusion. The portion 951 is inserted between the second roll 960 having the concave portion 961 into which the concave portion 961 is inserted, and at that time, the cutting convex portion 951 is pierced into a portion of the laminate 940 corresponding to the absorber, and the elastic member of the portion is inserted. 920 is cut and a hole is formed in the portion. Thus, one continuous elastic sheet 206 in which the elastic members in the portion corresponding to the absorber are discontinuous is manufactured for each of the surplus portion of the front body and the lower back and the surplus portion of the rear body and the lower back. . In order to manufacture these elastic sheets, individual lines may be provided, or a single line may be divided into two in the longitudinal direction.

The front and back continuous stretchable sheets 206 thus manufactured are continuously attached to the front and back predetermined portions of the external sheet 201 with a hot melt adhesive or the like.

Next, the outer shape sheet 201 to which the continuous elastic sheets 206 for the front body and the rear view part are stuck.
Are sequentially fed into the die cutter device 320, where a portion corresponding to the leg opening 206 is pierced, and then a continuous waist elastic member 203 is continuously supplied to a predetermined portion of each body, respectively. For example, materials such as thread rubber and belt-shaped rubber are supplied in parallel at intervals, and are fixed by hot melt bonding. As the waist elastic member, the elastic member cut and perforated elastic sheet of the present invention can be used.

The outer sheet 20 to which the above-mentioned members are attached is provided.
1 is the outer sheet mounting device 3 of the final line 300
It is sent to 10. Here, the absorbing body 10 which is separately fed is disposed at a portion corresponding to the center portion of the outer sheet 201 in the product width direction, and is fixed by hot melt bonding or the like.

The external sheet 201 on which the attachment of various members is completed is folded in two by the folding device 330 so that the side edges 30, 30 of the front body F and the back body B are overlapped. After the side edges 30 and 30 are heat-sealed, the surplus portion left for transportation in the final cutter 350 is cut off to form a portion corresponding to the waist opening edge, and the continuous products are separated from each other by the side edges. The diaper is cut along the corresponding part, and cut into individual diapers to fit the product dimensions. These individual diapers are transferred to a counting device (not shown) sequentially after a picture, a pattern, or the like is transferred to the surface of the outer sheet 201 by a transfer roll 360 as necessary.

The disposable diapers thus produced are shown in FIGS.
As shown in FIG. 17, in both the front body F and the back body B, the portion corresponding to the center of the absorbent core 13 in the elastic sheets 206, 206,... The lower waist and crotch elastic members 920, 920,... Of the portion are cut, and holes X, X are formed in the portion.

As described above, the lower waist and the crotch elastic members 21F, 21B, 23F. 23
B can also be formed discontinuously, so that the appearance of the front and rear bodies F and B is refreshing and the air permeability is improved. Further, in this example, as shown in FIGS. 16 and 17, the design sheet 202 is laminated on the outside of the elastic sheet 206, so that the hole X of the elastic sheet 206 is
There is an advantage that the hole X is not exposed on the outer surface of the diaper as in the first embodiment, and the appearance is good.

In this example, the design sheet 202 can be omitted. However, also in this case, since the hole X of the elastic sheet is covered and hidden by the outer sheet 201 on the outside, the appearance is better than the example shown in FIG.

Also, the elastic members 920, 920... (21F, 21B, 23F, 23
B) is a portion corresponding to the entire width direction of the absorbent core 13;
The discontinuity can also be achieved by the cutting and forming of the elastic member according to the present invention.

On the other hand, in the present manufacturing method example, the cutting of the elastic member of the elastic sheet for the back body is omitted,
Similar to the first embodiment, a paper diaper in which only the lower back waist and crotch elastic members 21B and 23B of the back body are continuously arranged and fixed from one side edge 30 to the other side edge 30 can be provided. .

<Third Embodiment of Pants-Type Disposable Diaper> The third embodiment is different from the first embodiment, as shown in FIGS. 21F and the crotch elastic member 23F are continuously formed from the one side edge 30 to the other side, and the lower waist elastic member 21B and the crotch elastic member 2 in the back body B are formed.
The portion corresponding to the absorption core 13 of 3B is discontinuous. The lower back elastic member 21B and the crotch elastic member 23B in the back body B are made discontinuous by the elastic member cutting and hole forming processing of the present invention, and the holes X and X are formed in the portion to improve the air permeability. You.

<Fourth Embodiment of Pants-Type Disposable Diaper> In the fourth embodiment, as shown in FIG. 20, the waist elastic members 20F, 20 are different from the second embodiment.
The central portion B is also discontinuous and has a hole X formed by the cutting and forming of the elastic member according to the present invention.

<Supplementary Explanation and Other Embodiments of Pants-Type Disposable Diapers> As can be inferred by comparing the above-described embodiments, in the disposable diaper according to the present invention, the elastic member along the circumferential direction is used. Has at least one,
It is sufficient that at least one central portion of the elastic member along the circumferential direction is made discontinuous by the elastic member cutting and hole forming processing of the present invention, and the waist portion W, the lower waist portion U, and the crotch portion L Which one of the elastic members is provided and which one is discontinuous can be appropriately selected. However,
In order to obtain a refreshing appearance, it is preferable that the elastic member of the front body F, particularly at least the central portion of the lower waist and the crotch elastic members 21F and 23F in the above example, be discontinuous.

Further, the disposable diaper according to the present invention is not limited to the form in which the outer sheet 1 itself is formed by the stretchable sheet of the present invention as in the first embodiment, but is separated into the outer sheet 1 as in the second embodiment. The embodiment in which the elastic sheet 206 of the present invention is attached is also included.

In the above example, the rectangular absorbent main body 10 is joined to the hourglass-shaped outer sheet 1. In the present invention, a liquid-permeable top sheet 11 having the same shape as the outer sheet 1 is provided, and between them. The form in which the absorber AB is provided may be used.

The sheet 1 constituting the outer surface of the product is formed by laminating and fixing two or more air-permeable and water-repellent nonwoven fabrics in the above example, but may be a single nonwoven fabric. The elastic member 21 can be joined to the use surface side of the nonwoven fabric. Furthermore, a plastic sheet can be interposed between the nonwoven fabrics to be laminated, or can be bonded to the use surface side of the backside nonwoven fabric.

In the above embodiment, the entire elastic member at the part where the elasticity is desired to be cut is cut. However, for example, as shown in FIG. 21, only a part, for example, 30% or more, and particularly preferably 5% or more.
0% or more can be cut. In the illustrated example, every other elastic member 21F, 21B, 23F, 23B is cut, but it is also possible to cut only the upper part, only the middle part or only the lower part in the vertical direction.
Further, although not shown, it is also possible to perform processing for improving the air permeability only by forming the hole X without cutting the elastic member at all.

The waist elastic members 20F and 20B, lower waist elastic members 21F and 21B, and surplus elastic member 23F,
Any one or more of 23B may be a lattice mesh-like elastic member. For example, as shown in FIG.
A thread rubber is fixed in a mesh shape, for example, in a lattice shape over the entire non-woven fabric, and the portion corresponding to the absorbent core 13 at the center in the circumferential direction is subjected to the cutting and stretching of the elastic member according to the present invention. is there. In this case, the thread rubber in the circumferential direction forms each elastic member of the waist portion W, the lower waist portion U, and the crotch portion L.

The elastic member provided at each portion of the disposable diaper may be made of a material such as natural rubber or synthetic rubber, or an elastic material such as urethane. In addition, a strip-shaped elastic stretch band or a sheet-shaped one having a large area can be used. Examples of these are belts such as urethane,
There are films or sheets. As the film, a non-porous film or a perforated film, and as the sheet, a mesh-like sheet or the like can be appropriately selected. Non-porous film 60
23 is shown in FIG. In addition, a mesh-like film 6
FIG. 24 shows an example of the arrangement of No. 1. Also in these embodiments, it is important to perform the cutting of the stretchable member and the formation of the hole X of the present invention in the center where the stretchability is desired to be reduced.

The outer sheet 1 can be provided with an elastic member in various forms in order to fit the crotch or the crotch. FIG. 25 shows that the edge of the rear side portion is almost parallel to the edge of the leg opening of the crotch portion L from the edge of the front side portion.
The crotch elastic members 24, 24 are fixed between the nonwoven fabrics of the external sheet 1 respectively. It is desirable that the protruding width t of the leg opening edges 6, 6 from the crotch elastic members 24, 24 be within 5 mm (preferably within 2 mm). In this embodiment, the crotch elastic member 24 contracts the leg opening LO to prevent leakage of body fluid. In addition, the crotch elastic member 24,
In order to clearly show 24, the absorption main body 10 is shown by a virtual line.

FIG. 26 shows the crotch elastic members 25 in the front body F and the back body B from the left side end to the right side end so as to cross the crotch part.
F, 25B are fixed between the nonwoven fabrics of the outer sheet 1. In this example, the front body F side and the back body B
The leg surrounding and crotch elastic members 25F and 25B partially cross each other within a range R of 2 to 3 cm, especially 4 to 6 cm before and after the crotch 4.

Also in this embodiment, the elastic members 25F, 2F
When the protrusion width t of the leg opening edges 6 and 6 from the leg peripheral portion of 5B is within 5 mm (preferably within 2 mm), the flickering of the leg opening edge 6 is further reduced as in the tenth embodiment. .

FIG. 27 shows the crotch and crotch extending from the end of the left side to the end of the right side so as to cross the crotch in the front body F and the back body B, respectively. The members 26F and 26B are fixed between the nonwoven fabrics of the outer sheet 1. In this example, the crotch elastic member 26F,
26B is 2-3 cm before and after the crotch part 4, especially 4-6 cm
, But parallel to each other at the crotch without crossing.

In the examples shown in FIGS.
Only the central portions of the lower waist elastic members 21F and 21B are subjected to the cutting of the elastic member of the present invention and the forming process of the hole X. Hole X is not formed.

On the other hand, as shown in FIG. 28, in the crotch portion, the width of the outer sheet 1 may be smaller than the width of the absorbing body 10, particularly the absorbing core 13. This FIG.
In the embodiment and the above-described embodiment, the outer sheet 1 protruding outward from the side edge of the absorbent core 13 tends to flicker.
This is a problem when trying to obtain a clean feeling throughout the product. Therefore, like the crotch elastic member 23 of the first embodiment,
By providing the shaping elastic members 27 on both sides of the crotch portion L between the nonwoven fabrics of the outer sheet 1 and moving the protruding outer sheet 1 to the center side, it is possible to eliminate the flickering feeling. In this case, by fixing the outer ends of the shaping elastic members 27 with the seal wire 28 made of a hot melt adhesive, it is possible to prevent the outer ends of the shaping elastic members 27 from being drawn into the center.

FIG. 29 similarly shows the right and left sides of the front body F and the back body B so as to cross the crotch from the end of the left side in order to eliminate the flickering feeling. Across
The shaping elastic members 29, 29 are fixed between the nonwoven fabrics of the outer sheet 1 respectively. In this embodiment, the outer peripheral sheet 1 protruding outward from the side edge of the absorbent core 13 is moved toward the center by an intermediate circumferential portion of the shaping elastic member 29.
The feeling of flickering can be eliminated, and the end of the shaping and stretching member 29 extends over the end of the side, so that the crotch acts to lift the waist to the side of the torso T, eliminating the slack of the abdomen and buttocks. , It will be more refreshing.

The mode of cutting the elastic member and forming the hole X in the examples of FIGS. 28 and 29 is described in the fourth embodiment.
This is the same as the embodiment.

<First Embodiment of Tape-type Disposable Diaper>
As described above, the present invention is directed to a tape-type disposable diaper as well as a pants-type disposable diaper. This first embodiment is shown in FIG. 30 and FIG. In this example,
Standing sheets 41, 41 are provided on both sides, and elastic members 51, 51 are provided at the distal ends of these free standing portions, thereby forming standing cuffs C, C. The upright sheet 41 is joined to the back sheet 1 similar to the outer sheet. Reference numeral 42 denotes a tape fastener for bringing the left and right side portions on the back side to the left and right side portions on the abdomen side and joining them. In this example, at the longitudinal ends of the front body F and the back body B, between the nonwoven fabrics of the outer sheet 1 at the waist portion W, in order to enhance the fit around the waist, parallel to the edge of the waist opening WO. Waist elastic members 20F and 20B made of fine thread rubber are arranged and fixed so as to extend and contract at intervals. Further, lower waist elastic members 21F and 21B are provided along the circumferential direction at the lower abdomen of the front body F and the buttocks of the back body B, except for the central part, along the circumferential direction. Crotch elastic members 23F and 23B extending between the parts are provided.

In this case, the waist elastic member 20F,
Except for 20B, the central portions of the lower back elastic members 21F and 21B and the crotch elastic members 23F and 23B are cut and discontinuous by the elastic member cutting and hole forming processing of the present invention, and the holes X, X is formed to improve the air permeability.

<Second Embodiment of Tape-type Disposable Diaper>
A second embodiment is shown in FIGS. This form is an example without a standing cuff. And the absorption core 1
3 along the longitudinal direction of the outer flap portion of the elastic member 52,
52 is fixed between the liquid-permeable top sheet 11 and the back sheet 12. Also in this example, waist elastic members 20F and 20B, lower waist elastic members 21F and 21B.
And crotch elastic members 23F and 23B are provided.

In such a case, the waist elastic member 20F,
Except for 20B, the central portions of the lower back elastic members 21F and 21B and the crotch elastic members 23F and 23B are cut and discontinuous by the elastic member cutting and hole forming processing of the present invention, and the holes X, X is formed to improve the air permeability.

<Preferred Width of Each Part of Product> In the disposable diaper of the present invention, as shown in FIG.
It is preferable that the width d2 of the absorbent core relative to 1 is 40% or less.

Further, in the disposable diaper to which the stretchable sheet obtained by cutting the stretchable member of the present invention is applied, the side edge of the outer sheet 1 is 5 m from the side edge of the absorbent core 13 at the crotch portion 4.
m. 34A, the crotch side end of the outer sheet 1 protrudes outside the crotch side end of the absorbent core 13, and the protruding width d3 is 5 mm or less, as shown in FIG. FIG.
As shown in (B), the crotch-side end of the outer sheet 1 enters the crotch-side end of the absorbent core 13, and the crotch-side end of the absorber AB protrudes from the crotch-side end of the outer sheet 1. Therefore, the case where the protrusion width d4 is set to 5 mm or less is included. Although not shown, the case where the crotch-side end of the outer sheet 1 and the crotch-side end of the absorbent core 13 overlap each other is also included.

The stretchable sheet portion manufactured by cutting at least the stretchable member in such a manner is arranged so that the stretchable direction extends along the circumferential direction and the cut portion is located at the center in at least one of the front body and the back body. In the disposable diaper provided, since the shrinkage of the central portion is eliminated, the feeling of volume and muffledness is reduced, and the appearance is refreshing. However, as described above, the crotch side end of the outer sheet 1 is formed of an absorbent core. By forming the outer sheet 1 so as to be located within 5 mm from the crotch side end of the crotch 13, the outer sheet 1 hardly protrudes from the side of the absorbent core 13, and the volume and muffled feeling of the crotch 4 are further reduced, and the appearance is improved. It will be even cleaner.

[0116]

As described above, according to the present invention, it is possible to perform the processing for cutting the elastic member and improving the air permeability without fear of the sheet being broken, and the air permeability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram of an operation mode of first and second rolls.

FIG. 4 is an explanatory diagram of cutting of an elastic member and forming a hole according to the present invention.

FIG. 5 is a cross-sectional view of a sheet showing an aspect of a hole formed according to the present invention.

FIG. 6 is a perspective view showing various cutting projections.

FIG. 7 is a plan view showing an example of the arrangement of cutting projections.

FIG. 8 is a plan view showing a cutting mode.

FIG. 9 is an explanatory view showing various laminated structures of a stretchable sheet.

FIG. 10 is a plan view of the first embodiment as viewed from the side in which the unfolded state is used, for explaining the terms of the present invention.

FIG. 11 is a plan view of the first embodiment, as viewed from the use surface side in the unfolded state.

FIG. 12 is a view taken along line 5-5 in FIG. 11;

FIG. 13 is a front view and a rear view of the disposable diaper in a product state.

FIG. 14 is a manufacturing flow of a pants-type disposable paper diaper according to the second embodiment.

FIG. 15 is a plan view of the second embodiment viewed from an unfolded use surface side.

FIG. 16 is a view taken along line 5-5 of FIG. 15;

FIG. 17 is a front view and a rear view of the disposable diaper in a product state.

FIG. 18 is a plan view of the third embodiment from the side of the deployed surface.

FIG. 19 is a front view and a rear view of the third embodiment.

FIG. 20 is a plan view of the fourth embodiment from the side of the deployed surface.

FIG. 21 is a plan view of another embodiment, as viewed from the use surface in a developed state.

FIG. 22 is a plan view of another embodiment from the side in which the developing state is used.

FIG. 23 is a plan view of the embodiment in which the expansion and contraction member of another material is provided, as viewed from the use surface side in the unfolded state.

FIG. 24 is a plan view of the embodiment in which the expansion and contraction member of another material is provided, as viewed from the use surface side in the unfolded state.

FIG. 25 is a plan view of the embodiment to which the other expansion member is added, as viewed from the side in which the expansion state is used.

FIG. 26 is a plan view of the embodiment in which another elastic member is added, as viewed from the use surface in the unfolded state.

FIG. 27 is a plan view of the embodiment to which a further expansion / contraction member is added, as viewed from the use surface side in the developed state.

FIG. 28 is a plan view of the embodiment to which a further expandable member is added, as viewed from the use surface in a developed state.

FIG. 29 is a plan view of the embodiment to which the other expansion member is added, as viewed from the use surface side in the unfolded state.

FIG. 30 is a plan view of the tape-type disposable diaper according to the first embodiment as viewed from the side in which the tape-type disposable diaper is used.

FIG. 31 is a view as viewed from the position corresponding to line 5-5.

FIG. 32 is a plan view of the tape-type disposable diaper according to the second embodiment, as viewed from the side in which the disposable diaper is used.

FIG. 33 is a position arrow view corresponding to the line 5-5.

FIG. 34 is a front view of the use state of the disposable diaper showing a preferable example of the crotch width.

[Explanation of symbols]

910: lower sheet, 911: adhesive applied portion, 912: adhesive non-applied portion, 920: elastic member, 921: guide guide, 930: upper sheet, 931, 932: press roll, 950: first roll, 951 ... Cutting protrusions, 960
... Second roll, 961.

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Claims (11)

[Claims] (1) A single or a plurality of elastic members, such as a thread, a net, and a band, are arranged in an extended state on a sheet or between upper and lower sheets to form a laminate, and a plurality of cutting projections are formed on the surface at intervals. The first roll and the second roll having a concave portion into which the cutting convex portion is inserted are disposed so as to face each other, and the laminate is passed between the two rolls. A method for manufacturing a stretchable sheet, characterized in that at least one of cutting the stretchable member and forming a hole in the laminate is performed by piercing a cut convex portion. 2. The method of manufacturing an elastic sheet according to claim 1, wherein both the cutting of the elastic member and the formation of a hole in the laminate are performed by piercing the cutting convex portion. 3. A hole is formed in the laminate by cutting the elastic member without cutting the elastic member by piercing the cutting protrusion.
A method for producing the stretchable sheet according to the above. 4. The roll according to claim 1, wherein as the first roll, a roll having a cutting projection having an area of a base end face of stabbed into the laminated body of 0.01 cm ² or more is used. Method for producing an elastic sheet. 5. The roll according to claim 1, wherein a plurality of the cut protrusions are arranged in a staggered manner at a pitch of 1 to 25 mm in an axial direction and a circumferential direction of the roll as the first roll. A method for producing a stretch sheet according to any one of the preceding claims. 6. A roll having a cutting projection in the form of a conical pin having a cross section of a circle, an ellipse, or a star, or a polygon such as a triangle, a square, or a polygon, as the first roll.
A method for manufacturing the stretchable sheet according to claim 1. 7. When a stretchable member is arranged between the upper and lower sheets in a stretched state to form a laminate, an adhesive is applied to at least one of the upper and lower sheets to sandwich the stretchable member between the upper and lower sheets. The method for producing a stretchable sheet according to any one of claims 1 to 6, wherein the adhesive sheet is adhered. 8. The method according to claim 1, wherein the adhesive is applied to at least one of the sheet and the elastic member continuously or discontinuously in the longitudinal direction, or partially, wholly or partially except for the whole. Item 8. The method for producing a stretchable sheet according to any one of Items 1 to 7. 9. The method for manufacturing a stretchable sheet according to claim 1, wherein all or a part of the stretchable member is cut by piercing the cutting projection. 10. A disposable diaper comprising a stretchable sheet produced by the method according to any one of claims 1 to 9 attached to a stretchable portion. 11. A disposable diaper having a waist opening and left and right leg openings formed by joining both side edges of a front body and a back body of an outer sheet in a use state, and having an absorbent core in a central part. Item 10. An elastic sheet portion manufactured by cutting at least an elastic member by the method according to any one of Items 1 to 9, wherein at least one of a front body and a rear body, an elastic direction is along a circumferential direction and a cut portion. And a crotch-side end of the outer sheet is formed so as to be located within 5 mm from a crotch-side end of the absorbent core.