JP2007130490A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article having leg region forming members 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. <P>SOLUTION: In an absorbent article having leg region forming members 71, 71 arranged in an elongated state at a pair of leg regions 70, 70 arranged around a wearer's leg, the leg region elastic members comprises a first and a second elastic member 71a, 71b having crossing parts 71a" and 71b" arranged to cross the absorber 4 , and the first and second elastic members do not exhibit elastic expansible/contractible property at least at an area of the portion where the absorbent core exists, and the predetermined parts of the first and second elastic members with parts which does not exhibit elastic expansible/contractible property are fixed to the component of the absorbent article by a second fixing means S, S. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a disposable diaper having excellent fit, excellent wearing feeling and leakage prevention.

  Conventionally, leg elastic members for forming leg gathers are arranged so as to cross the crotch from one leg to the other of the legs arranged around the legs of the wearer. Disposable diapers that have been cut in are known.

  In such a disposable diaper, a very thin thread rubber having a low elongation stress and good adhesion to a sheet material such as a nonwoven fabric sandwiching the leg elastic member is used as the leg elastic member. This is produced by cutting at the crotch part when using elastic members with large stretching stress such as thick thread rubber or elastic members with poor adhesion such as natural rubber with talc attached to the surface. This is because, during or during mounting, the release of the elastic member reaches the side edge of the leg portion, so-called rubber loss occurs, so that the fit around the legs is impaired and leakage may occur.

  However, using an elastic member with a small so-called expansion / contraction stress results in insufficient tightening force around the legs, and may not be able to follow the intense movement of the wearer, resulting in leakage of urine and feces. In order to solve such a problem, if an elastic member having a small expansion and contraction stress is disposed at a high elongation rate, the adhesiveness with a sheet such as a nonwoven fabric sandwiching the elastic member is lowered.

  In addition, if 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 elastic properties of the elastic member are hindered and the fit is reduced. Furthermore, there is a possibility of physically stimulating the wearer's skin. Further, the adhesive oozes out from a sheet such as a nonwoven fabric sandwiching the elastic member, which may cause discomfort due to stickiness and further cause blurring.

  Therefore, the object of the present invention is to freely determine the elongation stress of the elastic members for forming leg gathers and the arrangement elongation ratio so that an appropriate tightening force can be obtained around the legs during product development. Absorbent articles such as disposable diapers that can improve fit and absorption performance without inconveniences such as deterioration of flexibility and skin irritation, and laminates preferably used for the production of such absorbent articles It is providing the manufacturing method of the lamination sheet which can manufacture a sheet | seat efficiently.

  The present invention includes a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent interposed between the two sheets, and a leg portion disposed around the legs of the wearer. In the absorbent article in which the leg forming elastic members for gathering are arranged in an extended state, the leg elastic members are composed of first and second elastic members, and each of the first and second elastic members is a pair of It has a pair of gather forming parts arranged in the leg part and a transverse part arranged so as to cross the absorber, and the gather forming parts of both elastic members in each leg part are opposite to each other The gather forming portions of the first and second elastic members are fixed to the constituent material of the absorbent article by the first fixing means, and the first and / or second elastic members In front of the crossing The predetermined part of the first and / or second elastic member, which has a portion that does not exhibit elastic stretchability at a portion where the absorber exists and does not exhibit the elastic stretchability, is provided by the second fixing means. The object is achieved by providing an absorbent article fixed to a constituent material of the absorbent article (hereinafter referred to as the present invention when referred to as the first invention).

  The present invention also includes 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 together, and an elastic member is the adhesive. The elastic member is introduced while being swung in a direction perpendicular to the flow direction of the two continuous sheets so as to be fixed between the two continuous sheets via the two sheets, and then the two continuous sheets are bonded together; A step of dividing the member 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 at the same time before or after the division of the elastic member or simultaneously with the division. The above-mentioned object is achieved by providing a method for producing a partially elasticized laminated sheet comprising the following (hereinafter referred to as this invention when referred to as the second invention).

  According to the absorbent article of the first invention, at the time of product development, it is possible to freely determine the elongation stress of the elastic member for leg gather formation and the arrangement elongation rate so that an appropriate tightening force can be obtained around the legs. In addition, absorbent articles such as disposable diapers with improved fit and absorption performance can be obtained without inconvenience such as deterioration of flexibility around the legs and irritation to the skin.

  According to the method for producing a laminated sheet of the second invention, it is a partially elasticized laminated sheet that is preferably used for producing absorbent articles such as disposable diapers, such as inconveniences such as deterioration of flexibility around legs. Thus, a laminated sheet capable of easily obtaining a disposable diaper or the like with improved fit and absorption performance can be easily and economically produced.

Hereinafter, the present invention will be described based on preferred embodiments thereof.
The disposable diaper 1 which is 1st Embodiment of the absorbent article of this invention is the liquid-permeable surface sheet 2, the liquid-impermeable leak-proof sheet 3, and both sheets 2 and 3 as shown in FIG. A pants-type that includes a liquid-retaining absorbent body 4 interposed therebetween, and leg members 70 and 70 that are arranged around the legs of the wearer, and elastic members 71 for forming leg gathers are arranged in an extended state. It is a disposable diaper.

The disposable diaper 1 includes an absorbent main body 10 including a top sheet 2, a leak-proof sheet 3, and an absorbent body 4, and an outer layer that is positioned outside the absorbent main body 10 and is bonded and fixed to the absorbent main body 10. It consists of a body 5.
The disposable diaper 1 has an abdominal side A disposed on the wearer's ventral side, a back side B disposed on the back side, and a crotch C positioned therebetween, and both sides of the abdominal side A. The edges A1 and A2 and both side edges B1 and B2 of the back side B are joined by known joining means such as heat seal, high frequency seal and ultrasonic seal, and a pair of leg openings 7 and waist openings 8 Is formed.

The top sheet 2, the leak-proof sheet 3, and the absorber 4 are integrated to form a vertically long absorbent main body 10. The absorber 4 has an hourglass shape with a central portion in the longitudinal direction, and is sandwiched and fixed between the top sheet 2 and the leak-proof sheet 3.
The absorbent main body 10 has a longitudinal direction coincident with the longitudinal direction of the disposable diaper, that is, the direction connecting the abdominal side A and the back side B in a state where the diaper 1 is unfolded. It is joined by a known joining means.
A solid guard 6 having a free end on the inner side in the width direction of the absorbent main body 10 and a fixed end on the outer side is provided on both left and right sides of the absorbent main body 10 in the longitudinal direction. A plurality of three-dimensional guard elastic members 61 are fixed to the three-dimensional guards 6 so as to be extendable and retractable. As a result, the three-dimensional guards 6 are erected to prevent the liquid from flowing out in the width direction of the absorbent main body 10. . The plurality of three-dimensional guard elastic members 61 are arranged along the longitudinal direction of the absorbent main body 10 at a predetermined interval.

  A waist elastic member 81 for forming waist gathers is disposed in the waist opening 8 in an expanded state along the edge of the opening. Specifically, a plurality of waist elastic members are disposed along the respective widths at the front and rear end portions of the outer layer body 5, and the waist elastic members 81 provide waist opening. An annular waist gather that is substantially continuous over the entire circumference is formed in the portion 8. Although not shown in the figure, the outer layer body 5 is provided in the waist portion D located below the crotch C and below the position where the waist elastic member 81 is disposed on the abdominal side A and the back side B. A plurality of trunk periphery elastic members are arranged in the width direction.

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

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

  Further, the gather forming portions of the first and second elastic members 71a and 71b are arranged so as to face the same side of the abdominal side portion A and the back side portion B, and both elastic members 71a and 71b Crossing is performed at the portion C, and a pair of crossing portions F and F are formed on both the left and right sides of the crotch portion C.

  The gather forming portions 71a ′, 71a ′, 71b ′, 71b ′ of the first and second elastic members 71a, 71b are outer layers 5 as components of the disposable diaper 1 by the adhesive G as the first fixing means. It is fixed in the extended state. Specifically, the first and second elastic members 71a and 71b are arranged between the two sheet materials 51 and 52 constituting the outer layer body 5, and the gather forming portions 71a ′ and 71b ′ are bonded to each other. It is bonded and fixed to one or both of the sheet materials 51 and 52 via the agent G.

  The first and second elastic members 71a, 71b are located at both side edges of the ventral side A and the back side B, respectively, and both side edges A1, A2 of the ventral side A of the diaper 1 In a state where both side edges B1 and B2 of the back side portion B are joined to each other, the end portions of both elastic members 71a and 71b are overlapped, and as shown in FIG. 1, the leg openings 7 and 7 of the diaper 1 An annular leg gather substantially continuous over the entire circumference is formed at the peripheral edge.

And the 1st and 2nd elastic members 71a and 71b are made so that elastic elasticity is not expressed in the part in which cross section 71a '' and 71b '' the absorber 4 exists. That is, the first and second elastic members 71a and 71b are cut at the crossing portions 71a "and 71b", respectively, and the elastic members 71a and 71b do not exhibit elastic stretchability at the site where the absorber 4 exists. Region E is formed.
And the predetermined site | part of the 1st and 2nd elastic members 71a and 71b is being fixed to the outer-layer body 5 as a structural material of the diaper 1 by the heat seal as a 2nd fixing means.
It should be noted that the elastic member does not exhibit elastic elasticity, but the elastic member is disposed, but the elastic member is not stretched or the elasticity of the elastic member has disappeared due to heat treatment or the like. And the case where the elastic member is not present in the portion.
Further, in this specification, an elastic member is “split” means that a portion of the elastic member that exhibits elastic elasticity is divided via a portion that does not exhibit such elastic elasticity. And is preferably divided by cutting the elastic member.

More specifically, the crossing portions 71a "and 71b" of the first and second elastic members 71a and 71b are not fixed to the outer layer body 5 at a portion overlapping the absorber 4, that is, a portion where the absorber 4 exists. The elastic members 71 a and 71 b are cut at a portion that is not fixed to the outer layer body 5.
The 1st and 2nd elastic members 71a and 71b are being fixed by the 2nd fixing means on both sides of the cut part in a crossing part. In FIGS. 1 and 2, a portion where heat sealing is performed as the second fixing means is indicated by a symbol S. As shown in the figure, in the present embodiment, the adhesive region P1 in which the two sheets 51, 52 arranged on both sides of the first and second elastic members 71a, 71b are fixed by the first fixing means. A non-adhesive region P2 that is not fixed by the first fixing means is formed, and heat sealing as the second fixing means is performed in the vicinity of the boundary line between the adhesive region P1 and the non-adhesive region P2, more specifically, the boundary It is formed in the adhesion region P1 adjacent to the line (indicated by the alternate long and short dash line P in FIG. 2). Further, the first and second elastic members 71a and 71b are fixed inward in the width direction with respect to the pair of intersecting portions F and F formed on the 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 sheet materials 51 and 52 constituting the outer layer body 5, and fixing by heat sealing as the second fixing means is performed as follows. The two sheet materials are fused together and the elastic member is sandwiched and fixed between the two sheet materials, or the elastic member itself is fused to the sheet material on one side or both sides.

  The first fixing means in the first invention is a means for fixing the gather forming portion of the leg elastic member to the constituent material of the absorbent article, preferably a sheet material. As the first fixing means, an adhesive, Although heat sealing, ultrasonic sealing, etc. are mentioned, it is preferable that it is an adhesive like in this embodiment. As the adhesive as the first fixing means, various known adhesives can be used, but hot melt adhesives are preferable, and SEBS, SBS, and SIS hot melt adhesives are particularly preferable.

  The second fixing means is means for fixing a predetermined part of the leg elastic member to the constituent material of the absorbent article, and is different from the first fixing means or the same means as the first fixing means. There is a means applied in a step different from the step of applying the first fixing means (preferably a step after the step of the first fixing means), which is performed so as to obtain different bonding strengths, As the second fixing means, heat sealing, ultrasonic sealing or an adhesive, particularly an adhesive is preferable.

The outer layer body 5 in the disposable diaper 1 of the present embodiment includes the above-described pair of sheet materials, that is, an outer layer sheet 51 that forms the outer surface of the disposable diaper, an inner layer sheet 52 that is laminated and adhered to the inner side of the outer layer sheet 51, and these These elastic members are disposed between the sheets 51 and 52, and are sandwiched and fixed, that is, a leg elastic member 71, a waist elastic member 81, and a waist elastic member (not shown).
Further, since the elastic member in the lower part of the diaper can be manufactured without cutting and removing, the manufacturing line can be speeded up.

The outer layer body 5 is 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 of 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 shown in FIG. As shown, the adhesive as the first fixing means is applied in a predetermined pattern (coating process).
In the present embodiment, the adhesive is intermittently applied at predetermined intervals in the flow direction X of both continuous sheets (only one is shown). Thereby, the application | coating part H1 and the non-application | coating part H2 of an adhesive agent are alternately formed in the continuous sheet in the flow direction X of a continuous sheet. The application pattern of the adhesive in the present coating process is not particularly limited, such as a stripe, spiral, solid, or dot shape. Both continuous sheets are continuously conveyed in the same direction. You may perform intermittent application | coating of the said adhesive agent partially.

Next, both the elastic members 71a and 71b are orthogonal to the flow direction X of the two continuous sheets so that the first and second elastic members 71a and 71b are intermittently fixed between the two continuous sheets via the adhesive. After being introduced in an extended state while being swung in the direction Y, the two continuous sheets are bonded together (introduction bonding step). In the present embodiment, the continuous sheet of the inner layer sheet 52 is bonded immediately after the introduction of both elastic members 71a and 71b, but the continuous sheet of the inner layer sheet 52 is not shown.
In this introducing and bonding step, the two continuous sheets are bonded to each other at the adhesive application portion H1 to form an adhesive region P1, and a non-adhesive region P2 in which the two 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 adhesion region P1, and are not fixed between the two continuous sheets in the non-adhesion region P2.

  Next, as shown in FIG. 3 (b), both elastic members 71a and 71b are cut at a portion that is not fixed to both continuous sheets (cutting step), and further, as shown in FIG. 3 (c). A part of the elastic members 71a and 71b thus formed is fixed to both continuous sheets by heat sealing as a second fixing means (fixing step). A portion indicated by S in FIG. 3 is a portion where heat sealing has been performed.

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

  In the first and second inventions, the shape material of the two sheet materials when the elastic members 71a and 71b are fixed between the two sheet materials includes heat-sealable fibers in both the sheet materials. In particular, a non-woven fabric including a core-sheath type adhesive conjugate fiber (for example, a composite fiber of PET core PE sheath), a non-woven fabric containing a side-by-side type adhesive conjugate fiber, and a bi-component containing a high melting point and a low melting point synthetic fiber. A non-woven fabric of the component is preferable because high fixing strength can be obtained due to high heat sealability.

In addition, when heat sealing is used as the second fixing means, the heat sealing may seal the entire sealing area (solid sealing), but from the viewpoint of preventing the sealing area from becoming hard and feeling worse. It is preferable to partially seal with a predetermined pattern.
Moreover, heat sealing is normally performed by inserting the leg elastic member between a pair of seal rolls together with a sheet material for fixing the leg elastic member. 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 heating rolls. Furthermore, using a cylinder having a bore diameter of less than 200 mm for the pattern roll and / or the backup roll, and using a pressurizing means by applying a pressure of 5 to 50 kgf / cm 2 to the cylinder is processed under the optimum processing conditions for the material. In addition, the processing conditions can be stabilized, which is preferable. In addition, when heat-sealing, it is preferable not to give damage, such as breakage, to the sheet | seat material etc. which fix a leg part elastic member.

  In addition, when the elastic members 71a and 72b are each composed of a plurality of pieces, it is preferable that the plurality of elastic members are separated from each other at the site where the second fixing means is applied. This is to prevent the texture of the laminated sheet 50 from being lowered due to the bundle of elastic members and increasing the thickness, and by securing both sides of each elastic member, the elastic members are securely fixed. Because it can.

  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.

  Moreover, the elastic members 71a and 71b may be cut individually by elastic members, or may be cut by bundling a plurality of pieces. In the former case, the elastic members 71a and 71b are elastically reliable by limiting the cutting object. The member can be cut, and in the latter case, damage to the sheet material due to cutting can be minimized.

  The disposable diaper 1 of 1st Embodiment joins and fixes the absorptive main body 10 manufactured according to the conventional method to the outer-layer body 5 manufactured as mentioned above by a well-known joining means, and also both side edges A1 of the ventral part A , A2 and both side edges B1 and B2 of the back side B can be easily manufactured.

  Explaining the forming material of the constituent member of the disposable diaper 1 of the first embodiment, the top sheet 2, the leak-proof sheet 3, the absorbent body 4, the sheet material for forming the three-dimensional guard 6 and the elastic member 61, the waist elastic member 81, As a material for forming the waist circumference elastic member, 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), natural rubber, EVA. Stretchable materials such as stretchable polyolefin and urethane can be widely used, and the form is preferably a thread-like or tape-like section having a rectangular, square, circular or polygonal cross section. An elastic member having a property of being plasticized by heat is also preferably used.

  As a material for forming the outer layer sheet 51 and the inner layer sheet 52 constituting the outer layer body, it is preferably a highly flexible sheet having liquid resistance, liquid impermeability, moisture permeability, air permeability, and feeling close to underwear, Specifically, a woven fabric, a non-woven fabric, a film, a moisture permeable film, an apertured film, a composite material thereof, or the like is used.

The pants-type disposable diaper 1 of this 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 crossing portion, and the region E where the leg elastic member 71 does not exhibit elastic stretchability at the site where the absorber 4 is present. Since the absorber 4 is difficult to shrink during wearing, the absorption performance can be maintained even if the width of the absorber 4 is narrowed. Thereby, size reduction of the absorber 4, reduction of used materials, etc. can be aimed at. In addition, since the absorber is not easily pleated, it has an easy-to-use and clean appearance.

In the disposable diaper 1, the first and second elastic members 71 a and 71 b are fixed at predetermined positions by the second fixing means. In addition, when using elastic members with poor adhesion such as natural rubber with talc attached to the surface, even when elastic members with low expansion and contraction stress are arranged at a high elongation rate, so-called rubber removal occurs. There is no. Therefore, the elastic members for forming leg gathers and the arrangement elongation ratio thereof can be appropriately determined so that an appropriate tightening force can be obtained around the legs, and the fit and absorption performance can be efficiently and economically determined. Improvements can be made.
The first and / or second elastic members 71a and 71b are band-like elastic members from the viewpoint of obtaining a disposable diaper having excellent fit and absorption performance so that an appropriate tightening force can be obtained around the legs. Is preferred.
Further, 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, there is a decrease in flexibility due to a large amount of adhesive, adverse effects on the skin, discomfort due to stickiness, and the like. There is no fear.

In addition, according to the above method for producing a laminated sheet, it is possible to efficiently and economically produce a partially elasticized laminated sheet that can be preferably used for producing absorbent articles such as disposable diapers. Can do.
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. The second fixing means is the first fixing means (adhesion). Different from the agent, or the same means (adhesive), but different steps from the step of applying the first fixing means or preferably the step of applying the first fixing means (preferably the first fixing means) Means applied in a step after the step). Examples of the second fixing means include heat sealing (including ultrasonic sealing), adhesive, physical fixing by pressure bonding, meshing, and the like, and heat sealing or adhesive is preferable.

  Hereinafter, the disposable diaper and the manufacturing method of a lamination sheet as a 2nd embodiment of the manufacturing method of the absorptive article and lamination sheet of the present invention are explained. The manufacturing method of the disposable diaper and laminated sheet of the second embodiment is different from the first embodiment only in that the second fixing means is not heat seal but an adhesive. Hereinafter, differences from the first embodiment will be described, and description of similar configurations and the like will be omitted. For points that are not particularly described, the description given above with respect to the first embodiment, including preferred aspects, is applied as appropriate.

  When using an adhesive as the second fixing means, the adhesive may be continuously applied to both continuous sheets in the flow direction Y in a strip shape, but the cost is reduced and the texture (hardness of the application part) is improved. Boundary between the adhesive region P1 where the two continuous sheets are adhered to each other by the adhesive as the first fixing means and the non-adhesive region P2 which is not adhered, from the viewpoint of suppressing adhesive smearing and accumulation in the production process It is preferable to apply an adhesive as the second fixing means in the vicinity of the line P. In the diaper of 2nd Embodiment, the adhesive agent as a 2nd fixing means is apply | coated to the same site | part as the site | part which performed the heat seal in 1st Embodiment.

In order to apply the adhesive as the second fixing means to the selected specific part, a coating device and a positioning device may be used.
As the coating apparatus, either a contact type or a non-contact type may be used. As the contact type, a slot coater or the like is used. As the non-contact type, a spiral spray, curtain spray, a bead gun, or the like is used.
As the positioning device, a gun controller or the like is used, and a line speed and a trigger signal are input, and the output is connected to the coating device. As a result, the adhesive can be applied to a desired site.

  As in this embodiment, when both the first and second fixing means are adhesives, the basis weight of the adhesive of the second fixing means portion (the portion where the second fixing means is applied) is the first fixing means portion. It is preferable that the basis weight of the adhesive of (part where the first fixing means is applied) is larger. Further, the first fixing means and the second fixing means may use the same or different types of adhesive.

  According to the manufacturing method of the disposable diaper and laminated sheet of 2nd Embodiment, the effect similar to the manufacturing method of the disposable diaper and laminated sheet of 1st Embodiment is show | played.

A disposable diaper 1 ′ as a third embodiment of the absorbent article of the present invention will be described with reference to FIG. 4. Hereinafter, difference with the disposable diaper 1 of 1st Embodiment is demonstrated, and description is abbreviate | omitted about the same point. For points that are not particularly described, the description given above with respect to the first embodiment, including preferred aspects, is applied as appropriate.
The disposable diaper 1 ′ of the third embodiment is provided on the waist portion D located below the crotch part C and below the position where the waist elastic member 81 is disposed in each of the abdominal part A and the back part B. A plurality of waist circumference elastic members 9 are arranged at predetermined intervals across the width direction of the diaper 1 ′, and the waist circumference elastic members 9 do not exhibit elastic stretchability at the site where the absorber 4 exists. Has been made. That is, the trunk periphery elastic member 9 is divided at the center in the width direction of the diaper 1, and the region E ′ in which the trunk periphery elastic member 9 does not exhibit elastic stretchability at the site where the absorber 4 exists. Is formed.
The waist circumference elastic member 9 is disposed between the two sheets constituting the outer layer material 5, and is fixed to the outer layer body 5 in the vicinity of the side joints 11, 11 of the diaper 1 ′. The existing center portion in the width direction is not fixed to the outer layer body 5. The trunk periphery elastic member 9 is divided at a portion that is 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 arranged in the waist circumference D, the fit of the wearer around the waist is improved, and the feeling of wearing and the leakage prevention effect are improved. It is even better. And since the trunk | drum circumference part elastic member 9 is made so that elastic elasticity may not be expressed in the site | part in which the absorber 4 exists, the shrinkage | contraction and twist of the absorber 4 during wear are prevented effectively, Therefore, Even if the width of the absorber 4 is narrowed, the absorption performance can be maintained. Thereby, size reduction of the absorber 4, reduction of used materials, etc. can be aimed at. In addition, since the absorber is not easily pleated, the disposable diaper is easy to wear and has a clean appearance. In addition, when used as a disposable diaper for adults, a separate urine collection pad is often inserted between the top sheet 2 and the wearer, and in such cases, shrinkage or twisting is an absorber. Otherwise, it is easy to stably place the urine collecting pad at a predetermined position, and therefore, the leakage due to the displacement of the urine collecting pad is effectively prevented.

  As mentioned above, although embodiment about each of 1st and 2nd invention was described, this invention is not restrict | limited to these embodiment, In the range which does not deviate from the meaning of this invention, a various change is possible.

For example, in the first invention, the leg elastic member 71 is formed between the constituent sheet of the outer layer body 5 that does not form the outermost surface and another sheet adjacent to the constituent sheet, or the leakproof sheet 3 and the outer layer body. 5 may be arranged between the sheets constituting the sheet 5 and the like.
Further, only one of the first and second elastic members 71a and 71b may be cut. Further, the swinging pattern of the first and second elastic members 71a and 71b and the fixing part by the second fixing means may be a pattern and part as shown in FIG. In FIG. 5, the site | part which gave the heat seal or the adhesive agent as a 2nd fixing means is shown by S. In FIG. Further, the first and second elastic members 71a and 71b may each be one.
In addition, at least one of the modes in which the first and / or second elastic members 71a and 71b are configured not to exhibit elastic stretchability in the portion where the absorber 4 is present in the crossing portions 71a "and 71b". The elastic member may be cut and fragmented at a plurality of locations so as not to exhibit elastic stretchability. The trunk periphery elastic member may be omitted.
The fixing step in the second invention may be performed before or simultaneously with the cutting step.

  Further, in the first and second inventions, the first fixing means may be a whole surface adhesion in addition to the intermittent pattern adhesion as in the above embodiments. Even if the first fixing means is the entire surface, when the elastic body is cut, its holding force is insufficient, rubber is lost, and the stretchability of the leg portion is not expressed. By providing the second fixing means, it is possible to prevent the rubber from reaching the leg portion.

Moreover, you may provide the shielding sheet which shields the cut | disconnected edge part of a 1st and / or 2nd elastic member in the cutting location of a 1st and / or 2nd elastic member. The end portion of the elastic member generated by cutting is contracted to be non-functional, 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 concealment 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 indicated by virtual lines. In addition, as a forming material of the concealment sheet 53, a highly flexible sheet having a touch close to an underwear is preferable. Specifically, a woven fabric, a nonwoven fabric, a film, a moisture permeable film, an apertured film, paper, or a composite material thereof. Etc. are used.
It should be noted that the first elastic member and the second elastic member are arranged so as to cross the absorber, as long as there is something intended to be arranged in such a manner before dividing, and by dividing (particularly cutting). Even if there is no portion where the absorbent body and each elastic member overlap, it does not depart from the spirit of the present invention. For example, even if each elastic member is cut between gather forming portions and both sides of the cut portion contract and the elastic member is not positioned on the absorbent body, it is absorbed before cutting. The part arranged to cross the body is a crossing part.

  The present invention can be applied to unfolded disposable diapers provided with a pair of fastening tapes, pant-type sanitary napkins, and the like, in addition to pants-type disposable diapers.

FIG. 1 is a perspective view showing a disposable diaper according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view showing a developed state of the disposable diaper shown in FIG. 1. FIG. 3 is a diagram showing an outline of the production process of the method for producing a laminated sheet of the present invention. FIG. 4 is a perspective view showing a disposable diaper according to the 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, and is a view in which only the outer layer body is viewed in a plan view after removing the absorbent main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 10 Absorbent main body 11 Side junction part 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 part elastic member 71a 1st elastic member 71b 2nd elastic member 71a ', 71b' Gather formation part 71a ", 71b" Crossing part 8 Waist opening part 81 Waist elastic member A Abdominal side part B Back side part C Crotch part E Does not express elastic elasticity Area P1 Adhesion area P2 Non-adhesion area

Claims (5)

A liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent interposed between the two sheets are provided on the leg portion arranged around the wearer's legs for leg gather formation. In the absorbent article in which the leg elastic member is arranged in an extended state,
The leg elastic member includes a first elastic member and a second elastic member. The first elastic member and the second elastic member cross 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 to face each other in opposite directions,
The gather forming portions of the first and second elastic members are fixed to the constituent material of the absorbent article by the first fixing means,
The 1st and / or 2nd elastic member is made so that elastic stretchability may not be expressed in the part in which the absorber in the crossing part exists, and has the portion which does not express the elastic stretchability. Alternatively, the absorbent article in which the predetermined portion of the second elastic member is fixed to the constituent material of the absorbent article by the second fixing means.   The absorbent article according to claim 1, wherein the first fixing means is an adhesive and the second fixing means is a heat seal.   The absorbent article according to claim 1, wherein the first and second fixing means are both adhesives.   The said 1st and / or 2nd elastic member is divided in the said crossing part, The both sides of the division location in this crossing part are being fixed by the 2nd fixing means. Absorbent articles.   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 through the adhesive. The elastic member is introduced while being swung in a direction orthogonal to the flow direction of the two continuous sheets so as to be fixed therebetween, and then the step of pasting the two continuous sheets together, And a fixing step of fixing a predetermined portion of the elastic member to at least one of the two continuous sheets by the second fixing means at the same time before or after the division of the elastic member or simultaneously with the division. For producing a laminated sheet made elastically elastic.

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