JP2002035030A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article which is cut at the leg parts of elastic members and enables the free designation of the leg parts of the elastic members and the stretching rate in such a manner that suitable tightening force is obtained around the legs. SOLUTION: The leg part elastic members of the absorptive article formed by disposing the leg part elastic members 71 and 71 in the stretched state at the leg parts 70 and 70 disposed around the legs of a wearing person consist of the first and second elastic members 71a and 71b having crossing parts 71a" and 71b" disposed to cross an absorber 4. The first and second elastic members are so formed as not to develop elastic strethability in the segments in the crossing parts 71a" and 71b" where the absorber 4 exists. In addition, the prescribed segments of the first and second elastic members having the segments where the elastic strethability is not developed are fixed to the component materials of the absorptive article by second fixing means S and S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a disposable diaper which has an excellent fit, a feeling of wearing, and an excellent leakage prevention.

[0002]

2. Description of the Related Art
A leg portion elastic member for forming leg gathers is arranged so as to cross the crotch from one side of the leg portion arranged around the leg of the wearer to the other, and the leg portion elastic member,
Disposable diapers cut at the inseam are known.

In such a disposable diaper, a very thin thread rubber having a small elongational stress and having good adhesiveness to a sheet material such as a nonwoven fabric sandwiching it is used as the leg elastic member. This is achieved by cutting at the crotch when using an elastic member such as a thick thread rubber that has a large expansion and contraction stress, or an elastic member with poor adhesion such as natural rubber with talc adhered to the surface. This is because, during or during mounting, the release of the elastic member in the extended state reaches the side edge of the leg portion, so-called rubber detachment occurs, the fit around the leg is impaired, and leakage may occur.

However, if an elastic member having a small so-called stretching stress is used, the tightening force around the leg is insufficient, so that it is impossible to follow the intense exercise of the wearer, and there is a possibility that urine and feces leak. In order to solve such a problem, if an elastic member having a small stretching stress is disposed at a high elongation rate, the adhesiveness with a sheet such as a nonwoven fabric sandwiching the elastic member is reduced.

When the amount of the adhesive for fixing the elastic member is increased in order to prevent the rubber from coming off, the flexibility is reduced by a large amount of the adhesive, and the elasticity of the elastic member is hindered, and the fitting property is impaired. It may cause a decrease and may cause physical irritation to the wearer's skin. Further, the adhesive may exude from a sheet of nonwoven fabric or the like that sandwiches the elastic member, which may cause discomfort due to stickiness and cause rash.

Accordingly, an object of the present invention is to provide
In order to obtain the proper tightening force around the leg, the extension stress of the elastic member for forming the leg gather and the extension ratio can be freely determined, which causes inconvenience such as deterioration of the flexibility around the leg and irritation to the skin. Absorbent articles, such as disposable diapers, which can improve fit and absorption performance, and a laminated sheet, which can efficiently produce a laminated sheet preferably used for producing such absorbent articles, without accompanying It is to provide a manufacturing method of.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a liquid-permeable top sheet, a liquid-impermeable leak-proof sheet, and a liquid-retentive absorber interposed between the two sheets, and is provided around a leg of a wearer. In the absorbent article, in which the leg portion elastic member for forming the leg gather is arranged in an extended state,
The leg elastic member includes a first elastic member and a second elastic member. Each of the first elastic member and the second elastic member traverses a pair of gather forming portions disposed on the pair of leg portions and the absorber. And the gather forming portions of both elastic members in each leg portion are arranged so as to face in opposite directions.
The gather forming portion of each elastic member is fixed to a component of the absorbent article by first fixing means, and the first and / or second elastic member is provided at a portion of the cross section where the absorber is present. A predetermined portion of the first and / or second elastic members having a portion that does not exhibit elastic elasticity and has a portion that does not express the elastic elasticity,
The object has been achieved by providing an absorbent article fixed to a constituent material of the absorbent article by a second fixing means (hereinafter, the first invention is referred to as this invention).

[0008] Further, the present invention provides a method of manufacturing a printing apparatus, comprising:
A step of applying an adhesive as a first fixing means in a predetermined pattern; and a step of applying the elastic member to the flow direction of the two continuous sheets so that the elastic member is fixed between the two continuous sheets via the adhesive. After swinging in the direction perpendicular to
A step of bonding both continuous sheets together, a step of dividing the elastic member at a predetermined position, and a step of before and after or simultaneously with the division of the elastic member, the predetermined part of the elastic member is fixed by a second fixing means. The above object has been achieved by providing a method for manufacturing a partially elasticized laminated sheet, comprising: a fixing step of fixing to at least one of both continuous sheets. Sometimes this invention).

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on preferred embodiments. As shown in FIGS. 1 and 2, a disposable diaper 1 according to a first embodiment of the absorbent article of the present invention has a liquid-permeable top sheet 2, a liquid-impermeable leakproof sheet 3, and both sheets 2, 3. A leg portion 7 provided with a liquid-retentive absorber 4 interposed therebetween and disposed around the wearer's leg
A pants-type disposable diaper in which elastic members 71 for forming leg gathers are disposed in an extended state at 0 and 70.

A disposable diaper 1 has an absorbent body 10 having a topsheet 2, a leak-proof sheet 3 and an absorbent body 4, and is joined to and fixed to the absorbent body 10 located outside the absorbent body 10. Of the outer layer body 5. Disposable diaper 1
Has an abdominal part A disposed on the abdomen of the wearer, a dorsal part B disposed on the dorsal side, and a crotch C located therebetween.
Both sides A1, A2 of the abdomen A and both sides B1, B1 of the back B
B2 is joined by a known joining means such as a heat seal, a high-frequency seal, an ultrasonic seal or the like, so that a pair of leg openings 7 and a waist opening 8 are formed.

Top sheet 2, leakproof sheet 3, and absorber 4
Are integrated to form a vertically long rectangular absorbent body 10. The absorber 4 has a conical hourglass shape at the center in the longitudinal direction, and is sandwiched and fixed between the topsheet 2 and the leakage prevention sheet 3. The absorbent body 10 has its longitudinal direction coincident with the longitudinal direction of the disposable diaper, that is, the direction connecting the abdominal part A and the dorsal part B when the diaper 1 is deployed, and They are joined by known joining means. On the left and right sides in the longitudinal direction of the absorbent main body 10, three-dimensional guards 6 having free ends on the inner side in the width direction of the absorbent main body 10 and fixed ends on the outer side are provided. A plurality of three-dimensional guard elastic members 61 are fixed to each three-dimensional guard 6 so as to be extendable and contractible.
The outflow of the liquid in the width direction of the absorbent main body 10 is prevented. The plurality of three-dimensional guard elastic members 61 are spaced at a predetermined interval,
Each is arranged along the longitudinal direction of the absorbent main body 10.

In the waist opening 8, a waist elastic member 81 for forming waist gathers is extended along the opening edge. More specifically, a plurality of waist elastic members are arranged along the respective edges at the front and rear ends of the outer layer body 5 in the width direction thereof. Part 8
In addition, a substantially continuous annular waist gather is formed over the entire circumference. Although not shown, the outer layer body 5 is provided on the waist elastic part 81 of the abdominal part A and the back part B, which is located below the waist elastic member 81 and above the crotch part C. A plurality of waist-surrounding-portion elastic members are arranged in the width direction of the body.

In the disposable diaper 1 of the present embodiment,
Leg portions elastic members 71 for forming leg gathers are provided in an extended state on the leg portions 70, 70 disposed around the legs of the wearer. The leg elastic member 71 includes a first elastic member 71a and a second elastic member 71b, and the first and second elastic members 71a and 71b each include a pair of gather forming portions disposed on the pair of leg portions 70 and 70. 71a ',
71 a ′, 71 b ′, 71 b ′ and a crossing portion 71 arranged across the absorber 4 at the center of the crotch C
a ", 71b". Both elastic members 71a, 71b
Are formed along the left and right side edges of the crotch C formed in a concave shape.
a ″ and 71b ″ are located between a pair of gather forming portions of each elastic member and are continuous with the gather forming portions on both sides.

The gather forming portions 71a 'and 71b' of the first and second elastic members in each leg 70 are arranged so as to face in opposite directions. More specifically, in each leg portion 70, the gather forming portion 71a 'of the first elastic member is disposed so as to face the abdominal portion A, and the gather forming portion 71b' of the second elastic member is arranged on the back portion. B
It is arranged to head to.

Also, the first and second elastic members 71a, 71
b, each gather forming portion includes an abdominal portion A and a dorsal portion B
The elastic members 71a and 71b intersect at the crotch C, and a pair of intersections F and F are formed on both left and right sides of the crotch C.

The gather forming portions 71a ', 71a', 71b 'of the first and second elastic members 71a, 71b, respectively.
71b 'is fixed in an extended state to the outer layer body 5 as a component of the disposable diaper 1 by an adhesive G as first fixing means. Specifically, the first and second elastic members 7
1a and 71b are two sheet materials 5 constituting the outer layer body 5.
1 and 52, each gather forming portion 71
a ′, 71b ′ are connected to both sheet materials 51,
52 is adhered and fixed to one or both of them.

The first and second elastic members 71a, 71b are
Both end portions are located on both side edges of the abdominal portion A and the back side portion B, respectively.
In a state in which the side edges B1 and B2 of the back side B are joined to each other, the ends of the elastic members 71a and 71b overlap each other, and as shown in FIG. An annular leg gather substantially continuous along the entire periphery is formed on the periphery of 7,7.

Then, the first and second elastic members 71a, 71
1b does not exhibit elastic elasticity in the portion where the absorber 4 exists in the crossing portions 71a ″ and 71b ″. That is, the first and second elastic members 71a, 71
b are cut at the cross sections 71a ″ and 71b ″, respectively, and the two elastic members 7
Regions 1a and 71b do not exhibit elastic stretching properties. Then, the first and second elastic members 71a, 71
A predetermined portion b is fixed to the outer layer body 5 as a component of the diaper 1 by heat sealing as a second fixing means. It is noted that the elastic member is arranged to indicate that the elastic member does not exhibit elastic elasticity, but that the elastic member has been released from the stretched state or that the elastic member has lost its elasticity due to heat treatment or the like. And the case where no elastic member is present in the portion. In addition, in this specification, the term “split” of an elastic member means that a part of the elastic member that exhibits elastic elasticity is divided through a part that does not exhibit such elastic elasticity. And it is preferable that the elastic member is divided by cutting.

More specifically, the first and second elastic members 7
The cross sections 71a ″, 71b ″ of the respective 1a, 71b are
A portion that is not fixed to the outer layer body 5 has a portion that overlaps with the absorber 4, that is, a portion where the absorber 4 exists, and the two elastic members 71 a and 71 b have a portion that is not fixed to the outer layer body 5. You are disconnected. The first and second elastic members 71a and 71b are fixed by the second fixing means on both sides of the cut portion in the transverse portion. Figures 1 and 2
In FIG. 2, a portion where a heat seal is applied as a second fixing means is indicated by a symbol S. As shown in the figure, in the present embodiment, the two sheets 51 and 52 disposed on both sides of the first and second elastic members 71a and 71b are fixed to the bonding area P1 where the first and second elastic members 71a and 71b are fixed by the first fixing means. A non-adhesion area P2 not fixed by the first fixing means is formed, and heat sealing as the second fixing means is performed in the adhesion area P2.
1 and the vicinity of the boundary between the non-adhesive region P2, more specifically,
It is formed in the bonding area P1 adjacent to the boundary line (indicated by a dashed line P in FIG. 2). Further, the first and second elastic members 71a, 71b are fixed more inward in the width direction than a pair of intersections F, F formed on both left and right sides of the crotch portion C.

In the present embodiment, the first and second elastic members 71a and 71b are disposed between the two sheets 51 and 52 constituting the outer layer body 5, and are formed by heat sealing as second fixing means. The fixing is achieved by fusing the two sheet materials together and fixing the elastic member between the two sheet materials, or by fusing the elastic member itself to one or both side sheet materials.

[0021] The first fixing means in the first invention comprises: a gather forming portion of the leg elastic member;
Preferably, it is a means for fixing to the sheet material.
Examples of the fixing means include an adhesive, a heat seal, an ultrasonic seal, and the like, and an adhesive is preferable as in the present embodiment. As the adhesive as the first fixing means, various known adhesives can be used, but a hot melt adhesive is preferable, and in particular, SEBS, SB
S-based and SIS-based hot melt adhesives are preferred.

Further, the second fixing means is means for fixing a predetermined portion of the leg elastic member to a constituent material of the absorbent article, and is different from the first fixing means, or the first fixing means. Means that are the same means, but are applied so as to obtain different bonding strengths, or are applied in a step different from the step of applying the first fixing means (preferably a step subsequent to the step of the first fixing means) The second fixing means is preferably a heat seal, an ultrasonic seal or an adhesive, particularly an adhesive.

The outer layer body 5 of the disposable diaper 1 of the present embodiment is composed of the above-mentioned pair of sheet materials, that is, an outer layer sheet 51 forming the outer surface of the disposable diaper, and the outer layer sheet 5.
An inner layer sheet 52 laminated and adhered to the inner side of each of the members 1 and elastic members disposed and fixed between the sheets 51 and 52, that is, a leg elastic member 71, a waist elastic member 81, and a waist elastic portion. (Not shown). In addition, since the elastic member at the crotch lower portion of the diaper can be manufactured without being cut and removed, the speed of the manufacturing line can be increased.

The outer layer body 5 can be easily and efficiently manufactured by the following method which is the first embodiment of the method for manufacturing a laminated sheet of the present invention. In the manufacturing method according to the first embodiment, first, at least one continuous sheet 51A of the continuous sheet 51A of the outer layer sheet 51 and the continuous sheet (not shown) of the inner layer sheet 52 to be bonded to each other is attached to FIG.
As shown in (a), an adhesive as a first fixing means is applied in a predetermined pattern (application step). In the present embodiment, the flow direction X of both continuous sheets (only one is shown)
Then, an adhesive is intermittently applied at predetermined intervals. Thereby, the application portions H1 and the non-application portions H2 of the adhesive are alternately formed on the continuous sheet in the flow direction X of the continuous sheet.
The application pattern of the adhesive in the present application step is not particularly limited, such as a stripe, a spiral, a solid, or a dot. Note that the two continuous sheets are continuously conveyed in the same direction. The intermittent application of the adhesive may be partially performed.

Next, the first and second elastic members 71a, 71
In a stretched state, the elastic members 71a, 71b are swung in a direction Y perpendicular to the flow direction X of the continuous sheets so that the continuous sheets 1b are intermittently fixed between the continuous sheets via an adhesive. After the introduction, the two continuous sheets are bonded to each other (introduction bonding step). In the present embodiment, the continuous sheet of the inner layer sheet 52 is attached immediately after the introduction of the elastic members 71a and 71b, but the continuous sheet of the inner layer sheet 52 is not shown. In this introduction bonding step, both continuous sheets are bonded to each other at the adhesive application portion H1 to form the bonding region P1, and the non-bonding region P2 where the continuous sheets are not bonded to each other is formed. The first and second elastic members 71a and 71b are fixed between the two continuous sheets in the bonding area P1, and are not fixed between the two continuous sheets in the non-bonding area P2.

Next, as shown in FIG. 3B, the two elastic members 71a and 71b are cut at a portion not fixed to the two continuous sheets (cutting step).
As shown in (2), a part of the cut elastic members 71a and 71b is fixed to the two continuous sheets by heat sealing as a second fixing means (fixing step). The portion indicated by S in FIG. 3 is a portion subjected to heat sealing.

Through such steps, the laminated sheet 50 partially elasticized is obtained. The outer layer body 5 cuts and removes an extra portion 72 for forming a leg portion from the laminated sheet 50 and separates the laminated sheet 50 into individual outer layer bodies 5.
Is obtained by cutting to the dimensions of In the present embodiment, an elastic member other than the leg elastic member is introduced in the introduction bonding step.

In the first and second inventions, the elastic member 71
When a and 71b are fixed between the two sheet materials, the shape material of the two sheet materials is preferably a material containing heat-fusible fibers in both the sheet materials. Composite fiber (for example, composite fiber of PET core PE sheath)
, A non-woven fabric containing side-by-side type adhesive conjugate fibers, and a bi-component non-woven fabric containing high-melting and low-melting synthetic fibers are preferable because a high heat sealing property and a high fixing strength can be obtained.

When a heat seal is used as the second fixing means, the heat seal may be made by sealing the entire seal area (solid seal), but it is possible to prevent the seal area from being hardened and the texture from becoming worse. From the perspective of
It is preferable to partially seal in a predetermined pattern.
The heat sealing is usually performed by inserting a leg elastic member together with a sheet material for fixing the leg member between a pair of seal rolls. The pair of seal rolls are preferably a pattern roll and a backup roll, and only one of the rolls may be a heating roll, or both may be a heating roll. Further, using a cylinder having a bore diameter of less than 200 mm for the pattern roll and / or the backup roll, and using a pressing means by applying a pressure of 5 to 50 kgf / cm ² to the cylinder, it is possible to process under the optimum processing conditions for the material. In addition, it is preferable because the processing conditions can be stabilized. In heat-sealing, it is preferable not to damage or damage the sheet material or the like for fixing the leg elastic member.

When each of the elastic members 71a and 72b is composed of a plurality of elastic members, it is preferable that the plurality of elastic members are separated from each other at the portion where the second fixing means is applied. This is to prevent the feeling of the laminated sheet 50 from being lowered by the elastic members being bundled and increasing in thickness, and to secure the elastic members securely by sealing both sides of each elastic member. This is because you can do it.

Various known cutting means can be used for cutting the elastic members 71a and 71b. For example, a pinch cutter, a rotary die cutter, a heat seal cutter, an ultrasonic cutter, a water jet cutter, or the like can be used. In particular, in the case of an elastic member made of natural rubber, spandex, or the like, it is preferable to use a pinch cutter, a rotary die cutter, a heat seal cutter, or the like because the equipment load is small.

The cutting of the elastic members 71a and 71b
The elastic member may be cut individually, or a plurality of bundles may be cut and bundled.In the former case, the elastic member can be reliably cut by limiting the object to be cut, and in the latter case, ,
Damage to the sheet material due to cutting can be minimized.

In the disposable diaper 1 of the first embodiment, the absorbent body 10 manufactured according to a conventional method is joined and fixed to the outer layer body 5 manufactured as described above by a known joining means.
Further, both side edges A1 and A2 of the abdominal portion A and both side edges B of the back portion B
1 and B2 can be easily manufactured.

The materials for forming the constituent members of the disposable diaper 1 of the first embodiment will be described. The top sheet 2, the leak-proof sheet 3, the absorber 4, the sheet material for forming the three-dimensional guard 6 and the elastic member 61, the waist elasticity As the material for forming the member 81 and the elastic member around the waist, those conventionally used for disposable diapers and the like can be used without particular limitation.

As the material for forming the elastic members 71a and 71b, various known elastic materials can be used. Examples of the material include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene (registered trademark), and natural rubber. Stretchable materials such as rubber, EVA, stretchable polyolefin, and urethane can be widely used, and the preferred form is a thread, tape, or the like having a rectangular, square, circular, or polygonal cross section. An elastic member having the property of being plasticized by heat is also preferably used.

The material for forming the outer layer sheet 51 and the inner layer sheet 52 constituting the outer layer body is preferably a liquid resistance,
A liquid-impermeable, moisture-permeable, air-permeable, highly flexible sheet with a feel similar to underwear, specifically a woven fabric, nonwoven fabric, film, moisture-permeable film, apertured film, or a composite material thereof Are used.

Pants-type disposable diaper 1 of the present embodiment
Can be used in the same manner as a normal pants-type disposable diaper. In the disposable diaper 1 of the present embodiment, the first and second elastic members 71a and 71b are cut at the transverse portion, and the region E where the leg elastic member 71 does not exhibit elastic elasticity is located at the portion where the absorber 4 exists. Is formed, so that the absorber 4 does not easily shrink during wearing, so that the absorption performance can be maintained even if the width of the absorber 4 is reduced.
This makes it possible to reduce the size of the absorber 4 and reduce the amount of materials used. Further, since the absorber is not easily shirred, it is easy to apply and has a clean appearance.

Further, in the disposable diaper 1, the first
Since the second elastic members 71a and 71b are fixed at predetermined locations by the second fixing means, as the two elastic members, an elastic member such as flat rubber having a large expansion and contraction stress or a natural material having talc adhered to the surface is used. When an elastic member having poor adhesion such as rubber is used, and when an elastic member having a small stretching stress is disposed at a high elongation, so-called rubber slippage does not occur. Therefore, the elastic members for forming the leg gathers and the disposition and elongation thereof can be appropriately determined so that an appropriate tightening force can be obtained around the legs, and the fit and the absorption performance can be efficiently and economically determined. Improvement can be achieved. The first and / or second elastic members 71a, 7 are provided from the viewpoint of obtaining an appropriate disposable diaper having excellent fit and absorption performance by obtaining an appropriate tightening force around the leg.
1b is preferably a belt-shaped elastic member. Also,
In the disposable diaper 1 of the present embodiment, since it is not necessary to increase the amount of the adhesive for fixing the elastic member, a large amount of the adhesive may lower the flexibility, adversely affect the skin, and cause discomfort due to stickiness. There is no.

According to the above-mentioned method for producing a laminated sheet, a partially elasticized laminated sheet which can be preferably used particularly for producing absorbent articles such as disposable diapers can be produced efficiently and economically. Can be manufactured. still,
The first fixing means and the second fixing means in the second invention are both means for fixing the elastic member between two continuous sheets, and the second fixing means is the first fixing means (adhesive). Or the same means (adhesive), but applied so as to obtain a different bonding strength or a step different from the step of applying the first fixing means (preferably the step of the first fixing means) Also means used in the subsequent step). Examples of the second fixing means include a heat seal (including an ultrasonic seal), an adhesive, a physical fixation by pressure bonding, meshing and the like, and a heat seal or an adhesive is preferable.

Hereinafter, a method for producing a disposable diaper and a laminated sheet as a second embodiment of the method for producing an absorbent article and a laminated sheet of the present invention will be described. The manufacturing method of the disposable diaper and the laminated sheet of the second embodiment differs from the first embodiment only in that the second fixing means is an adhesive instead of a heat seal. Hereinafter, differences from the first embodiment will be described, and description of the same configuration and the like will be omitted. Regarding the points that are not particularly described, the above description regarding the first embodiment including the preferable aspects and the like is appropriately applied.

When an adhesive is used as the second fixing means,
Adhesive may be applied to both continuous sheets in a belt shape continuously in the flow direction Y. However, cost reduction, improvement in texture (hardness of the applied portion), and spotting / accumulation of adhesive in the production process are performed. From the viewpoint of suppression of the adhesion, the bonding area P1 where the continuous sheets are bonded to each other by the adhesive as the first fixing means.
It is preferable to apply an adhesive as a second fixing means in the vicinity of a boundary line P between the non-bonded area P2 and the non-bonded area P2. In the diaper according to the second embodiment, an adhesive as a second fixing means is applied to the same portion as the portion subjected to the heat sealing in the first embodiment.

In order to apply the adhesive as the second fixing means to the selected specific site, a coating device and a positioning device may be used. As a coating device, any of a contact type and a non-contact type may be used. As the contact type, a slot coater or the like is used, and as the non-contact type, a spiral spray, curtain spray, bead gun, or the like is used. As a positioning device, a gun controller or the like is used, which inputs a line speed and a trigger signal, and connects the output to a coating device. Thereby, an adhesive can be applied to a desired portion.

As in this embodiment, the first and second
When both of the fixing means are adhesives, the basis weight of the adhesive in the second fixing means portion (the portion on which the second fixing means has been applied) is the same as that of the first fixing means portion (the portion on which the first fixing means has been applied). It is preferably larger than the basis weight of the agent. Also, the first fixing means and the second fixing means
The type of adhesive used may be the same or different depending on the fixing means.

According to the method for manufacturing the disposable diaper and the laminated sheet of the second embodiment, the same operation and effect as those of the method for manufacturing the disposable diaper and the laminated sheet of the first embodiment can be obtained.

A disposable diaper 1 'as a third embodiment of the absorbent article according to the present invention will be described with reference to FIG. Hereinafter, differences from the disposable diaper 1 of the first embodiment will be described, and description of the same points will be omitted.
Regarding the points that are not particularly described, the above description regarding the first embodiment including the preferable aspects and the like is appropriately applied.
The disposable diaper 1 ′ of the third embodiment is located on the waist elastic portion 81 and below the position where the waist elastic member 81 is disposed and above the crotch C in the waist peripheral portion D in each of the abdominal portion A and the back portion B. A plurality of waist peripheral elastic members 9 are arranged at predetermined intervals in the width direction of the diaper 1 ′, and the waist peripheral elastic members 9 do not exhibit elastic elasticity in a portion where the absorber 4 exists. Has been made. That is, the waist-peripheral elastic member 9 is divided at the center in the width direction of the diaper 1, and the region E ′ where the waist-peripheral elastic member 9 does not exhibit elastic elasticity is provided at the portion where the absorber 4 exists. Are formed. The waist peripheral elastic member 9 is disposed between two sheets constituting the outer layer material 5, and is fixed to the outer layer body 5 near the side joints 11, 11 of the diaper 1 ', and the absorber 4 is The existing central portion in the width direction is not fixed to the outer layer body 5. And the elastic member 9 around the trunk
Is divided at a portion not fixed to the outer layer body 5.

According to the disposable diaper 1 'of the third embodiment, since the waist circumference elastic member 9 is disposed on the waist circumference D, the fit of the wearer around the waist is improved, and the feeling of wearing and the feeling of wearing are improved. It is even more effective in preventing leakage. In addition, since the waist peripheral elastic member 9 does not exhibit elastic elasticity in the portion where the absorber 4 is present, shrinkage or twisting of the absorber 4 during wearing is effectively prevented, and Even if the width of the absorber 4 is reduced, the absorption performance can be maintained. This makes it possible to reduce the size of the absorber 4 and reduce the amount of materials used. In addition, since the absorber is not easily shirred, it is easy to put on, and the disposable diaper has a clean appearance. In addition, when used as a disposable dish for adults, a separate urine absorbing pad is often inserted between the topsheet 2 and the wearer. Otherwise, the urine absorbing pad is easily stably placed at a predetermined position, and therefore, the leakage due to the displacement of the urine absorbing pad is effectively prevented.

The embodiments of the first and second inventions have been described above. However, the present invention is not limited to these embodiments, and various changes can be made without departing from the spirit of the present invention. .

For example, in the first invention, the leg portion elastic member 71 is provided between the constituent sheet of the outer layer body 5 not forming the outermost surface and another sheet adjacent to the constituent sheet, or the leakproof sheet 3. And the sheet constituting the outer layer body 5. Further, only one of the first and second elastic members 71a and 71b may be cut. The swing pattern of the first and second elastic members 71a and 71b and the portion fixed by the second fixing means may be a pattern and a portion as shown in FIG. In FIG.
The portion to which the heat seal or the adhesive is applied as the second fixing means is indicated by S. Also, the first and second elastic members 71
Each of a and 71b may be one. Further, the first and / or second elastic members 71a and 71b are
In a mode in which the elastic body 1a ″ and 71b ″ do not exhibit elastic stretchability, at least one elastic member is cut and fragmented at a plurality of positions. You may make it not express elastic elasticity. The elastic member around the trunk is
It can be omitted. The fixing step in the second invention comprises:
It may be performed before or simultaneously with the cutting step.

In the first and second aspects of the present invention, the first fixing means may be a whole-surface bonding in addition to the intermittent pattern bonding as in the above embodiments. Even if the first fixing means is on the entire surface, when the elastic body is cut, its holding force is insufficient, rubber escape occurs, and the elasticity of the leg portion is not exhibited. By providing the second fixing means, it is possible to prevent the rubber release from reaching the leg portion.

Further, a shielding sheet for shielding the cut end of the first and / or the second elastic member may be provided at the cut position of the first and / or the second elastic member. The end of the elastic member generated by the cutting is shrunk and rendered nonfunctional, and the cut end may be seen through from the outside, or the outer layer sheet at the cut portion may be damaged and a hole may be formed.
By providing a concealing sheet in that portion, the appearance is improved. In FIG. 2, a state in which the shielding sheet 53 is arranged on the inner surface side of the outer layer material 51 is shown by a virtual line. The concealing sheet 53
As a material for forming the above, a highly flexible sheet having a feeling similar to underwear is preferable, and specifically, a woven fabric, a nonwoven fabric, a film, a moisture permeable film, an apertured film, paper, or a composite material thereof is used. It should be noted that the phrase “the first elastic member and the second elastic member are arranged so as to cross the absorber” means that it is intended that the first elastic member and the second elastic member are arranged as such before the division. Even if there is no overlapping portion between the absorber and each elastic member, this does not depart from the spirit of the present invention. For example, even if each elastic member is cut between the gather forming portions, and both sides of the cut portion shrink, and the elastic member is no longer positioned on the absorber, it is absorbed before cutting. The part arranged across the body is the crossing.

The present invention can be applied not only to pants-type disposable diapers, but also to unfolded disposable diapers provided with a pair of fastening tapes, and further to pants-type sanitary napkins.

[0052]

According to the absorbent article of the first invention, at the time of product development, an appropriate tightening force around the leg can be obtained.
Improve fit and absorbability without any inconvenience such as deterioration of flexibility around the legs and irritation to the skin, because the elongation stress of the elastic members for forming leg gathers and the elongation rate of the arrangement can be freely determined. Thus, an absorbent article such as a disposable diaper can be obtained.

According to the laminated sheet manufacturing method of the second invention, a partially elasticized laminated sheet preferably used for manufacturing absorbent articles such as disposable diapers,
A laminated sheet capable of easily obtaining a disposable diaper or the like having improved fit and absorption performance without inconvenience such as deterioration of flexibility around the leg can be easily and economically manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disposable diaper according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a deployed state of the disposable diaper shown in FIG.

FIG. 3 is a view schematically showing a manufacturing process of a method for manufacturing a laminated sheet according to the present invention.

FIG. 4 is a perspective view showing a disposable diaper according to a third embodiment of the present invention.

FIG. 5 is a schematic view showing another embodiment of the disposable diaper as the absorbent article of the present invention, in which the absorbent main body is removed and only the outer layer body is viewed in a plan view.

[Description of Signs] 1 Disposable diaper 10 Absorbent main body 11 Side joint 2 Surface sheet 3 Leak-proof sheet 4 Absorber 5 Outer layer body 51 Outer layer sheet 52 Inner layer sheet 53 Concealment sheet 6 Three-dimensional guard 61 Three-dimensional guard elastic member 70 Leg part 71 Leg elastic member 71a First elastic member 71b Second elastic member 71a ', 71b' Gather forming portion 71a ", 71b" Crossing portion 8 Waist opening 81 Waist elastic member A Abdomen B Back side C Crotch E Elastic Non-elastic area P1 Adhesive area P2 Non-adhesive area

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ken Nemoto 2606 Kabanecho, Haga-gun, Tochigi Pref. 2606 Kao Corporation Research Laboratory F-term (reference)

Claims (5)

[Claims] 1. A leg portion provided with a liquid-permeable topsheet, a liquid-impermeable leakproof sheet, and a liquid-retentive absorber interposed between the two sheets, and arranged around a leg of a wearer, In an absorbent article in which a leg elastic member for forming leg gathers is disposed in an extended state, the leg elastic member includes first and second elastic members, and each of the first and second elastic members is a pair. Has a pair of gather forming portions disposed on the leg portion, and a transverse portion disposed across the absorber, and the gather forming portions of both elastic members in each leg portion are opposite to each other. The gather forming portions of each of the first and second elastic members are fixed to the constituent material of the absorbent article by first fixing means, and the first and / or second elastic members The member is located at the cross section A predetermined portion of the first and / or second elastic member having a portion where the elastic body does not exhibit elastic elasticity is provided so as not to exhibit elastic elasticity at a portion where the absorber exists. An absorbent article fixed to a constituent material of the absorbent article by means. 2. The absorbent article according to claim 1, wherein the first fixing means is an adhesive, and the second fixing means is a heat seal. 3. The absorbent article according to claim 1, wherein both the first and second fixing means are an adhesive. 4. The first and / or second elastic member is divided at the transverse portion, and is fixed on both sides of the divided portion of the transverse portion by second fixing means. The absorbent article according to any one of the above. 5. A step of applying an adhesive as a first fixing means in a predetermined pattern to at least one of the two continuous sheets to be bonded to each other, and an elastic member applies the adhesive to the continuous sheet. Introducing the elastic member while rocking the elastic member in a direction perpendicular to the flow direction of the two continuous sheets so that the elastic member is fixed between the two continuous sheets, and then bonding the two continuous sheets together; A dividing step at a predetermined portion, and a fixing step of fixing the predetermined portion of the elastic member to at least one of the two continuous sheets by the second fixing means before, after or simultaneously with the division of the elastic member. A method for producing a partially elasticized laminated sheet, comprising: