JP5447091B2 - Absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention comprises a member that envelops the abdomen of the wearer and a member that encapsulates the back of the wearer, and the absorbent main body is disposed so as to be bridged between the two members. The present invention relates to an absorbent article having a fixed structure and a method for manufacturing the same.

  Conventionally, as shown in FIG. 2, a pants-type body comprising a front body 2, a crotch 4, and a back body 6 and having a waist opening 10 and a pair of left and right leg openings 12 (12 a, 12 b) is formed. An underpants-type absorbent article 100A including an exterior body 16 to be presented and an absorbent main body 14 that is disposed inside the exterior body 16 and is an absorbent pad in which the absorber 22 is included has been used (reference numeral in the figure). 8 is a joining part, 40 is a leg elastic material, 42 is a waist elastic material, 44 shows a Tammy elastic material.

  In recent years, as shown in FIG. 3, the outer body is separated into a member that envelops the wearer's stomach side (abdominal body 60) and a member that encapsulates the wearer's back side (back exterior body 62). The absorbent main body 14 as an absorbent pad is disposed and fixed so as to be bridged between the abdominal exterior body 60 and the back exterior body 62, and the crotch portion of the absorbent body 14 is the exterior An absorbent article 100B having a structure exposed from the abdominal exterior body 60 and the back exterior body 62 constituting the body has been proposed (see, for example, Patent Documents 1 to 5). The absorbent article 100B shown in FIG. 3 can form the leg openings 12 without piercing the constituent sheet when forming the exterior body 16 like the absorbent article 100A shown in FIG.

WO2004 / 037145 JP 2009-56156 A JP 2009-160128 A JP 2009-160129 A JP 2009-202025 A

  However, when the edges (leg edges E4 and E8) on the leg opening 12 side of the abdominal exterior body 60 and the back exterior body 62 are linearly configured as in the absorbent article 100B shown in FIG. It is difficult for 12 peripheral parts to fit a wearer's leg shape, and to deform | transform following a motion of a wearer's leg. Accordingly, there are problems in terms of wearing feeling and fit.

  In consideration of such a problem, Patent Documents 1 to 5 wear part of the leg edge E4 and E8 side of the abdominal exterior body 60 and the back exterior body 62 in the absorbent article 100B as shown in FIG. A form that has been cut to fit the shape of the leg of the person has also been proposed.

  However, such a form requires 1) a step of excising the abdominal exterior body and the back exterior body during manufacture, 2) a large amount of trimmed pieces must be treated as waste, and 3) When the trim piece is mixed in the manufacturing process, there is a problem that it may cause a manufacturing trouble.

  INDUSTRIAL APPLICABILITY The present invention can be manufactured without generating trim pieces, and has an absorbent article excellent in wearing feeling and fit, and an absorbent article capable of manufacturing the absorbent articles without generating trim pieces. The manufacturing method of this is provided.

  As a result of intensive studies to solve the problems of the prior art as described above, the inventor joined the side edge portions of the abdominal exterior body and the back exterior body from the waist end edge to the leg end edge. The non-joint portion where the abdominal exterior body and the back exterior body are not joined is formed on the leg edge side, and the non-joint portion formed on both side edges of the abdominal exterior body and the back exterior body is further formed. The inventors have conceived that the above problem can be solved by fixing the stretchable material in the stretched state in the region between the joints in the left-right direction, and the present invention has been completed. Specifically, the present invention provides the following absorbent articles and methods for producing the same.

[1] An abdominal exterior body comprising a sheet body and encapsulating the wearer's ventral side, a back exterior body comprising a sheet body and encapsulating the wearer's back side, and an absorbent pad containing the absorbent body And an absorptive main body which encloses the crotch side of the wearer, and the absorptive main body is bridged between the abdominal exterior body and the back exterior body, and the abdominal exterior body and the While being fixed to the back exterior body, a joint portion for joining the side edges of both members is formed in the region on the waist edge side of the side edges of the abdominal exterior body and the back exterior body, and the leg A non-joined portion where both members are not joined is formed in the region on the edge side, and the region between the joined portions of the abdominal exterior body and the region between the joined portions of the back exterior body waist elastics and Tammy stretchable members are secured in a stretched state toward a lateral direction, and the ventral A thigh front elastic member is fixed in an extended state in the region between the non-joined portions of the body, and in the left-right direction in the region between the non-joined portions of the back exterior body. The thigh back elastic material is fixed in an expanded state toward the thigh , and the contraction force acting on the abdominal exterior body and the back exterior body by the front thigh elastic material and the thigh back elastic material is An absorbent article configured to be smaller than the contraction force acting by the waist elastic material and the tammy elastic material .

[2] The absorptive main body, the abdominal exterior body, and the back exterior body are configured such that a region between the abdominal exterior body and the non-joined portion of the back exterior body and the overlapping portion of the absorbent body are mutually The absorbent article according to the above [1], which is fixed by the bonded fixing portion.

[3] The absorbent article according to [1] or [2], wherein the joint is formed by a fastening member that holds side edges of both members together.

[4] An outer sheet continuous body which is a belt-shaped nonwoven fabric is fed out, a waist elastic material continuous body is disposed along an edge corresponding to the waist edge of the outer sheet continuous body, and the outer sheet continuous body is disposed around the trunk of the outer sheet continuous body. A tammy stretchable material continuum is disposed in the corresponding portion, and a thigh front stretchable material continuum that is a long stretchable material is disposed along the edge corresponding to the leg edge of the outer sheet continuum. Next, an abdominal exterior body continuous body is formed by laminating an inner sheet continuous body that is a strip-shaped nonwoven fabric so as to overlap the outer sheet continuous body, and an outer sheet that is a strip-shaped nonwoven fabric. feeding a continuous body along the edge corresponding to the waist end edge of the outer sheet continuous body disposed waist elastics continuum, to correspond to a waist of the outer sheet continuous body And disposed Tammy stretchable material continuum in part, and, along the edge corresponding to the leg end edge of the outer sheet continuous body, continue to place the Momoura stretchable member continuum an elongated stretchable material, Next, a back exterior body continuum is formed by laminating an inner sheet continuum that is a belt-shaped nonwoven fabric so as to overlap the outer sheet continuum (B), and the abdominal exterior body continuum and the The back exterior body continuous body is sent out so that the edges corresponding to the leg edges are adjacent to each other, and the absorbent main body, which is an absorbent pad in which the absorbent body is contained, is connected to the abdominal exterior body continuous body and the back exterior body continuous body. A step (C) of forming a fixed body by intermittently fixing the abdominal exterior body continuum and the back exterior body continuum so as to span between the body and the abdominal exterior; Edge corresponding to waist edge of body continuum The fixed body is folded so that the end edge corresponding to the waist edge of the back exterior body continuum coincides with the end edge side corresponding to the waist edge of the abdominal exterior body continuum and the back exterior body continuum. An area on the edge side corresponding to a leg edge of the abdominal exterior body continuum and the back exterior body continuum while forming a joint for joining the abdominal exterior body continuum and the back exterior body continuum in the area Forming the absorbent article continuum by forming a non-joined part without joining the abdominal exterior continuum and the back exterior continuum (D), and the absorbent article continuum A method for manufacturing an absorbent article , comprising the step (E) of separating along the joint portion to obtain a plurality of absorbent articles , wherein in the step (A) and the step (B), the front thigh elastic material By the continuum and the thigh back elastic material continuum, The front thigh stretch so that the contraction force acting on the abdominal exterior body continuum and the back exterior body continuum is smaller than the contraction force acting on the waist stretchable material continuum and the tammy stretchable material continuum. The manufacturing method of an absorbent article which arrange | positions a material continuous body, the said thigh back elastic material continuous body, the said waist elastic material continuous body, and the said tammy elastic material continuous body .

[5] In the step (C), the absorbent main body, the abdominal exterior body continuum, and the back exterior body continuum are between the portions corresponding to the non-joint portions of the abdominal exterior body and the back exterior body. The method for manufacturing an absorbent article according to the above [4], wherein the fixed body is formed by joining the region and the absorbent main body to each other.

[6] In the step (D), the abdominal exterior body continuum and the back exterior body continuum are disposed in a region on an edge side corresponding to a waist edge of the abdominal exterior body continuum and the back exterior body continuum. A fastening member to be fixed is fixed, and the joint member for joining the abdominal exterior body continuum and the back exterior body continuum by the fastening member is formed, and the abdominal exterior body continuum and the back exterior body continuum The method for manufacturing an absorbent article according to the above [4] or [5], wherein the region on the edge side corresponding to the leg edge forms the non-joined portion without fixing the fastening member.

  The absorbent article of the present invention can be manufactured without generating trim pieces, and the periphery of the leg opening easily fits the shape of the wearer's leg, and deforms following the movement of the wearer's leg. Easy to do. Therefore, it is excellent in terms of wear and fit. Moreover, the manufacturing method of the absorbent article of this invention can manufacture the absorbent article of this invention, without generating a trim piece.

It is a schematic front view which shows typically one Embodiment of the absorbent article of this invention. FIG. 1B is a schematic plan view schematically illustrating a state where the absorbent article illustrated in FIG. 1A is developed and viewed from the inside of the absorbent article. FIG. 1B is a schematic plan view schematically showing a state where the absorbent article shown in FIG. 1A is developed and viewed from the outside of the absorbent article. It is a schematic end view which shows typically the A-A 'cut end surface of the absorbent article shown in FIG. 1B. It is a schematic end view which shows typically the B-B 'cut end surface of the absorbent article shown in FIG. 1B. It is a schematic perspective view which shows typically one Embodiment of the conventional absorbent article. It is a schematic front view which shows typically another embodiment of the conventional absorbent article. It is a schematic process drawing which shows typically one embodiment of a manufacturing method of an absorptive article of the present invention.

  Hereinafter, the form for implementing the absorptive article of the present invention and its manufacturing method is explained concretely. However, the present invention broadly encompasses absorbent articles having the invention-specific matters and manufacturing methods thereof, and is not limited to the following embodiments.

[1] Unique configuration of the present invention:
The absorbent article of the present invention includes both members in the region on the side of the waist edges E3 and E7 in the side edges of the abdominal exterior body 60 and the back exterior body 62 as in the absorbent article 1A shown in FIGS. 1A to 1E. Joints 8 (8a, 8b) are formed to join the side edges of each other, and non-joint parts 68, 70 in which both members are not joined are formed in the region on the leg edge E4, E8 side. The front thigh elastic material 64 is fixed in an extended state in the region between the non-joint portions 68 of the abdominal exterior body 60 in the left-right direction, and the region between the non-joint portions 70 of the back exterior body 62 In addition, the thigh back elastic member 66 is fixed in an extended state in the left-right direction.

  In such a configuration, the region between the non-joint portions 68 of the abdominal exterior body 60 and the region between the non-joint portions 70 of the back exterior body 62 are directed toward the center in the left-right direction of the absorbent article 1A (that is, absorbed). 1 (A), the region on the leg edge E4, E8 side of the abdominal exterior body 60 and the back exterior body 62 is deformed so as to follow the wearer's leg shape as shown in FIG. 1A. . Therefore, the peripheral edge of the leg opening 12 is easy to fit into the shape of the wearer's leg, and it is easy to deform following the movement of the wearer's leg. That is, it is excellent in terms of wear and fit.

  Further, since it is not necessary to cut off part of the abdominal exterior body 60 and the back exterior body 62 at the time of manufacturing, there is no problem of a disposal problem of the trim piece and a manufacturing trouble due to the mixing of the trim piece.

[1-1] Abdominal exterior body, back exterior body:
As shown in FIG. 1B and FIG. 1C, the abdominal exterior body 60 is a member that encloses the abdomen side of the wearer, and the back exterior body 62 is also a sheet body, but the back side of the wearer. It is the member which encloses.

  The shape of the abdominal exterior body 60 and the back exterior body 62 may be appropriately determined according to the body shape of the wearer and the function thereof (enveloping the wearer's abdomen / back side). When the abdominal exterior body 60 and the back exterior body 62 are formed in a rectangular shape as shown in FIGS. 1B and 1C, the product shape is simplified, and the manufacturing process is simplified and easy. Moreover, it is also suitable for continuous production in which a long sheet is produced while being sent out. However, the shape of the abdominal exterior body 60 and the back exterior body 62 is not limited to a rectangular shape, and those having leg edges that are curved are included in the scope of the present invention.

  For example, if the long sheet is cut in a straight line along the longitudinal direction thereof to divide the long sheet into two to form the abdominal exterior body 60 and the back exterior body 62, the abdominal exterior body 60 and The shape of the back exterior body 62 can be a rectangular shape. In addition, if the long sheet is cut into an S shape along the longitudinal direction to divide the long sheet into two to form the abdominal exterior body 60 and the back exterior body 62, the abdominal exterior body 60 and The shape of the back exterior body 62 can be a shape in which the leg edge is formed in a curve. In the absorbent article of the present invention, the front thigh elastic material 64 and the thigh back elastic material 66 are not cut at the leg edge.

  As shown in FIGS. 1A to 1C, the dimension (width) between the side edges E1 and E2 of the abdominal exterior body 60 and the dimension (width) between the side edges E5 and E6 of the back exterior body 62 should be the same dimension. Is common.

  On the other hand, the dimension (length) between the waist edge E3 and the leg edge E4 of the abdominal exterior body 60 and the dimension (length) between the waist edge E7 and the leg edge E8 of the back exterior body 62 are the back exterior body. It is preferable to form 62 longer. This is to open the area in front of the wearer's thigh to facilitate the movement of the leg, and to reliably enclose the area of the wearer's buttocks and back of the thigh. And normally, it is comprised so that the waist edge E3 of the abdominal exterior body 60 and the waist edge E7 of the back exterior body 62 may correspond.

  As shown in FIGS. 1B and 1C, the absorbent article of the present invention has the side edges of both members in the region on the side of the waist edges E3 and E7 among the side edges of the abdominal exterior body 60 and the back exterior body 62. Are formed, and non-joined portions 68 and 70 to which both members are not joined are formed in the region on the leg end edges E4 and E8 side. With such a configuration, free edge portions are formed in the regions on the leg end edges E4 and E8 side of the abdominal exterior body 60 and the back exterior body 62, and the portions can be freely contracted without being constrained by the joint portion 8. It becomes.

  The side edge portions of the abdominal exterior body 60 and the back exterior body 62 mean the vicinity of the side edges E1 and E2 in the case of the abdominal exterior body 60, and the vicinity of the side edges E5 and E6 in the case of the back exterior body 62. In this portion, a joint 8 is formed.

  The form of the joint portion 8 is not particularly limited as long as the side edges of the abdominal exterior body 60 and the back exterior body 62 can be joined together. For example, a conventionally known joining method such as adhesion with an adhesive, heat fusion (heat sealing), ultrasonic fusion, or the like may be appropriately employed depending on the purpose.

  In addition, the absorbent article of the present invention includes those in which the joint portion 8 is formed by a fastening member that holds the side edges of the abdominal exterior body 60 and the back exterior body 62 together. That is, the joint 8 may be formed not only to be fixed but also to be detachable.

  For example, in the absorbent article 1A shown in FIGS. 1A to 1C, any one of the joint 8 (8a, 8b) formed on the abdominal exterior body 60 and the joint 8 (8a, 8b) formed on the back exterior body 62. The hook material (convex member) of the mechanical fastener and the other loop member (concave member) of the mechanical fastener are included in the scope of the present invention. The fastening member may be not only a mechanical fastener but also an adhesive fastener or the like as long as the side edges of the abdominal exterior body 60 and the back exterior body 62 can be fastened to each other.

  The non-joining parts 68 and 70 correspond to the part from the leg edge E4, E8 side edge of the joining part 8 to the leg edge E4, E8 of the abdominal exterior body 60 or the back exterior body 62. In order to make the leg movement easier by opening the area in front of the wearer's thigh and to surely encapsulate the area of the buttocks and back of the wearer. About 60, it is preferable that the length of the non-joining part 68 shall be 40-100 mm, and about the back exterior body 62, the length of the non-joining part 70 shall be 50-130 mm. On the other hand, in the case of an absorbent article for infants, the length of the non-joint portion 68 is set to 15 to 60 mm for the abdominal exterior body 60, and the length of the non-joint portion 70 is set to 30 to 80 mm for the back exterior body 62. It is preferable that

  As for the absorbent article of this invention, as shown to FIG. 1A-FIG. 1C, the thigh elastic material 64 is fixed in the expansion | extension state toward the left-right direction in the area | region between the non-joining parts 68 of the abdominal exterior body 60. At the same time, a thigh back elastic member 66 is fixed in an extended state in a region between the non-joint portions 70 of the back exterior body 62 in the left-right direction. In this way, by arranging the stretchable material that expands and contracts in the left-right direction in the region corresponding to the non-joint portions 68 and 70, the regions corresponding to the non-joint portions 68 and 70 of the abdominal exterior body 60 and the back exterior body 62 are It can be shrunk toward the center side.

  The left-right direction of the abdominal exterior body 60 or the back exterior body 62 is a direction parallel to the waist edges E3 and E7 of the abdominal exterior body 60 or the back exterior body 62. However, in the present invention, the front thigh elastic material 64 or the thigh back elastic material 66 does not have to be fixed in the right and left direction of the abdominal exterior body 60 or the back exterior body 62 in a strict sense. The same effect can be obtained when the abdominal exterior body 60 or the back exterior body 62 is disposed within a range of ± 15 ° with respect to the left-right direction, and is included in the scope of the present invention.

  Absorbent article 1A shown in FIG. 1A to FIG. 1C and FIG. 1E includes an abdominal exterior body 60 in which two nonwoven sheets of an inner sheet 60a and an outer sheet 60b are bonded together with an adhesive, and a back exterior body 62 is an inner sheet. 62a and outer sheet 62b are bonded together with an adhesive. The front thigh elastic material 64 is fixed between the inner sheet 60a and the outer sheet 60b, and the thigh back elastic material 66 is fixed between the inner sheet 62a and the outer sheet 62b in an extended state.

  “Fixed in the stretched state” means joining, fixing, etc. to a sheet material (in the illustrated example, the inner sheets 60a and 62a and the outer sheets 60b and 62b) to be fixed when the stretch rate of the stretchable material is 120% or more. Means that In other words, it is intended to exclude forms that are not “fixed in the stretched state”. Forms that are not “fixed in the stretched state” are as follows: 1) A stretchable material exists in the area, but the stretchable material is not fixed. 2) A stretchable material exists and is fixed in the area. However, it includes all forms in which the stretch rate is less than 120%, and 3) all forms in which no stretchable material exists in the region.

  The front thigh elastic material 64 and the thigh back elastic material 66 are regions that do not overlap with the absorbent body 22 included in the absorbent main body 14 in a region between the non-joint portions 68 and 70 of the abdominal exterior body 60 and the back exterior body 62. It is preferable to be fixed to. Specifically, in a region between the side edge of the absorbent body 22 and the side edges E1 and E2 of the abdominal exterior body 60 or a region between the side edge of the absorbent body 22 and the side edges E5 and E6 of the back exterior body 62. It is preferably fixed. By fixing the front thigh elastic material 64 and the thigh back elastic material 66 in this region, the front thigh portion of the abdominal exterior body 60 and the back thigh portion of the back exterior body 62 can be contracted, and the effects of the present invention can be achieved. You can get enough.

  Further, the front thigh elastic material 64 and the thigh back elastic material 66 are a region between the side edge of the absorbent body 22 and the side edges E1 and E2 of the abdominal exterior body 60 or the side edge of the absorbent body 22 and the back exterior body 62 side. It is preferable that the region between the edges E5 and E6 is fixed in the stretched state, and the region overlapping the absorber 22 is not fixed in the stretched state. When the front thigh elastic material 64 and the thigh back elastic material 66 are fixed in a stretched state at a portion overlapping the absorbent body 22 of the absorbent main body 14, the absorbent body 22 becomes the front thigh elastic material 64 and the thigh back elastic material 66. This is because it may cause deformation by contracting following the contraction of the material and causing leakage.

  The front thigh elastic material 64 and the thigh back elastic material 66 are preferably fixed at an interval of 5 to 30 mm for both an absorbent article for adults and an absorbent article for infants.

As the front thigh elastic material 64 and the thigh back elastic material 66, elastic materials similar to a waist elastic material and a tammy elastic material described later can be suitably used. Although the fixing method is not particularly limited, a fixing method similar to a waist stretchable material and a tammy stretchable material described later can be suitably used. However, the contraction force acting on the abdominal exterior body 60 and the back exterior body 62 by the front thigh elastic material 64 and the thigh back elastic material 66 is smaller than the contraction force acting on the waist elastic material 42 and the tammy elastic material 44. that make up to. Examples of the method for reducing the shrinkage force include a thin stretchable material, a stretchable material with a small shrinkage force (natural rubber, etc.), and a reduction in the stretch rate at the time of fixation. In addition, since the contracting force which acts is determined by the balance of these conditions, when an elastic material thinner than a waist elastic material etc. is used, the expansion rate at the time of fixation may be larger than a waist elastic material etc., for example.

[1-2] Absorbent body:
As shown in FIG. 1A to FIG. 1C and FIG. 1E, the absorbent main body 14 is attached to the abdominal exterior body 60 and the back exterior body 62 so as to be bridged between the abdominal exterior body 60 and the back exterior body 62. It is fixed.

  In this invention, as shown to FIG. 1E, the absorptive main body 14, the abdominal exterior body 60, and the back exterior body 62 are the area | region between the non-joining parts 68 and 70 of the abdominal exterior body 60 and the back exterior body 62, and absorptivity. The overlapping portion with the main body 14 is preferably fixed by fixing portions 72 and 74 joined to each other. By fixing in this way, the front thigh portion of the abdominal exterior body 60 and the back thigh portion of the back exterior body 62 contract toward the both side edges of the absorbent main body 14, so that the front thigh portion and the back thigh portion are It can be transformed into a shape along the shape of the wearer's leg.

  In the present invention, the fixing portions 72 and 74 are portions that serve as starting points when the front thigh elastic material 64 and the thigh back elastic material 66 contract. Accordingly, as long as there is a portion serving as a starting point of contraction, the overlapping portion of the absorbent main body 14 and the region between the non-joint portions 68 and 70 of the abdominal exterior body 60 and the back exterior body 62 are joined together. There is no need. For example, among the overlapping portions, 1) portions corresponding to the side edges of the absorbent main body 14, 2) portions near the leg edges E4 and E8 of the abdominal exterior body 60 and the back exterior body 62, or 3) absorption. The fixing portions 72 and 74 may be formed only in portions corresponding to both side edges of the sex body 14 and in the vicinity of the leg edges E4 and E8 of the abdominal exterior body 60 and the back exterior body 62.

[2] Other configurations of the present invention:
Hereinafter, other configurations of the absorbent article of the present invention will be described. The absorbent article of the present invention includes an abdominal exterior body 60, a back exterior body 62, and an absorbent main body 14 as essential constituent members as in the absorbent article 1A shown in FIGS. 1A to 1E. Configurations other than those already described will be described below.

[2-1] Abdominal exterior body, back exterior body:
The material of the abdominal exterior body and the back exterior body is not particularly limited, but a material having excellent breathability to prevent stuffiness inside the absorbent article, for example, a water-repellent nonwoven fabric made of polyethylene, polypropylene, polyester, or other synthetic fibers It is preferable to comprise.

As shown in FIGS. 1A to 1E, the abdominal exterior body 60 and the back exterior body 62 include an elastic material such as a waist elastic material 42 and a Tammy elastic material 44 in addition to the front thigh elastic material 64 and the thigh elastic material 66. the fixed in a stretched state.

  The waist elastic material 42 is fixed in an expanded state along the waist edges E3 and E7 of the abdominal exterior body 60 and the back exterior body 62. “Along the waist edge” means that the waist stretchable material 42 is arranged so as to be parallel to the waist edges E3 and E7 as shown in FIGS. 1A to 1C.

  A form in which a plurality of linear elastic materials are linearly arranged in a portion corresponding to the circumference of the wearer's torso elastic material 44 is often used. Also in this embodiment, for the same reason as the thigh back stretchable material, it is preferable to fix the stretched stretched material 44 so that the tammy stretchable material 44 does not cross the site where the absorber 22 is disposed as shown in FIG. 1B.

  In the present specification, the term “tammy stretchable material” means a material fixed to the region between the joint portions 8 (8a, 8b) of the abdominal exterior body 60 and the back exterior body 62, and is not joined. The elastic material (namely, the front thigh elastic material 64 and the thigh back elastic material 66) fixed in the area between the parts 68 and 70 is not included.

  The waist stretchable material 42 and the tammy stretchable material 44 are, for example, layers between two sheets (in the illustrated example, inner sheets 60a and 62a, and outer sheets 60b and 62b) constituting the abdominal exterior body 60 and the back exterior body 62. It is often fixed in an expanded state so as to be sandwiched between layers of the folded portion.

  The fixing method is not particularly limited, and examples thereof include a method in which an adhesive such as a hot melt adhesive is applied or sprayed on at least one of the stretch material and the sheet constituting the exterior body, and fixed. Examples of the coating method include spiral coating and spray spraying. In addition to the above-mentioned adhesion, fixing may be performed by welding (heat sealing or the like) using heat, ultrasonic waves, or the like.

  As elastic materials, flat rubber made of natural rubber and thread rubber made of elastic yarn of synthetic rubber (urethane rubber, etc.), elastic net, elastic film, elastic foam (urethane foam, etc.), etc. are preferably used. be able to.

  The stretchable material exerts a sufficient stretch force without exerting an excessive tightening force on the wearer. Therefore, the stretchable material is stretched at a stretch rate of 120 to 400% (more preferably, stretch at a stretch rate of 200 to 300%). It is preferable to fix in the state.

  The “stretch rate” indicates the ratio (percentage) of the length in the stretched state to the length of the stretchable material in the non-stretched state. That is, the stretch rate of the stretchable material in the non-stretched state is 100%, and the stretch rate when the stretchable material is stretched twice is 200%.

[2-2] Absorbent body:
The “absorbent main body” is an absorbent pad in which an absorbent body 22 is included, as shown in FIGS. 1B, 1D, and 1E, for example, and is a member that covers the crotch side of the wearer.

  Further, the “absorbing pad” means a pad-like member in which the absorbent body 22, the top sheet 18, and the back sheet 20 are integrally formed as shown in FIGS. 1D and 1E, for example. Usually, as shown to FIG. 1D, the top sheet 18 and the back surface of the absorbent body 22 (when the absorbent article is mounted) on the surface of the absorbent body 22 (the face located on the skin side of the wearer when the absorbent article is mounted). In many cases, the back sheet 20 is disposed on the surface of the wearer's clothing and the absorbent body 22 is disposed between the top sheet 18 and the back sheet 20.

  In the absorbent article 1A shown in FIG. 1D and FIG. 1E, the top sheet 18 and the back sheet 20 are bonded to each other at the peripheral portion of the absorbent body 22 so that the absorbent body 22 is included between the top sheet 18 and the back sheet 20. An absorbent main body 14 of the form is used. This absorptive main body 14 is an example of an absorptive main body in which, in addition to the absorber 22, the top sheet 18 and the back sheet 20, a solid gather 26 described later is also integrally formed.

[2-2A] Absorber:
An absorber is a member for absorbing and holding a wearer's urine etc., and is comprised with an absorptive material. Examples of the absorbent material include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. As the fluff pulp, wood pulp or non-wood pulp defibrated in a cotton-like form, the SAP as sodium polyacrylate, the hydrophilic sheet as tissue, absorbent paper, a non-woven fabric subjected to a hydrophilic treatment, etc. Is preferably used.

  As the absorbent body, it is preferable to use one or two or more kinds of absorbent materials formed into a single-layer or multi-layer mat. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, SAP may be mixed in a fluff pulp mat, or may be used in a layered manner between layers of a plurality of mats. In order to prevent the SAP from falling off and to impart shape stability, it is preferable to encapsulate the entire absorbent body with a hydrophilic sheet. An absorbent article 1A shown in FIGS. 1D and 1E is an example in which the entire absorbent body 22 is encapsulated by an upper tissue 54 and a lower tissue 56 which are hydrophilic sheets.

  What is necessary is just to use what was shape | molded in desired shapes, such as rectangular shape and an hourglass shape, according to the objective. The absorbent article 1A shown in FIGS. 1B, 1D, and 1E is an example in which a rectangular absorbent body 22 is used.

[2-2B] Top sheet:
The top sheet is a sheet material arranged to cover the surface of the absorbent body (the surface on the side facing the wearer's skin when the absorbent article is mounted). Since it is necessary to allow the wearer's urine or the like to permeate, at least a part (all or part) of the wearer's urine is made of a liquid-permeable material.

  Examples of the liquid permeable material include woven fabric, nonwoven fabric, and porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide, etc., which has been subjected to a hydrophilic treatment.

  As said nonwoven fabric, the nonwoven fabric manufactured by manufacturing methods, such as air through (card hot air) and card | curd embossing, can be used conveniently. The hydrophilic treatment can be performed by applying, spraying, impregnating, etc., a surfactant to the raw cotton of the nonwoven fabric.

  The top sheet is “at least partially” made of a liquid-permeable material. Although the position is not particularly limited, it is preferable that the portion overlapping the arrangement position of the absorber in the crotch portion is made of a liquid-permeable material when viewed in plan.

[2-2C] Backsheet:
The back sheet is a sheet material arranged so as to cover the back surface of the absorbent body (the surface on the side facing away from the wearer's skin when the absorbent article is mounted). The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the absorbent article.

  There is no restriction | limiting in particular about the arrangement position of a back seat | sheet. From the viewpoint of preventing leakage of urine absorbed by the absorbent body, it is preferable that the back sheet is disposed so as to cover at least the position where the absorbent body is disposed.

  Examples of the liquid impermeable material include a liquid impermeable film made of a resin such as polyethylene. Among these, it is preferable to use a microporous polyethylene film. This microporous polyethylene film is a film in which a large number of fine pores of 0.1 to several μm are formed, and is liquid-impermeable but has moisture permeability. Therefore, it is possible to prevent stuffiness inside the absorbent article while ensuring leakage resistance.

  In the absorbent article of the present invention, the crotch part of the absorbent main body is not encapsulated by the abdominal exterior body or the back exterior body and is exposed to the outside. Therefore, as shown in FIGS. 1C and 1E, it is preferable that the cover sheet 24 be bonded to the outer surface side of the back sheet 20 of the absorbent main body 14. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

  In the example illustrated in FIG. 1E, the cover sheet 24 is bonded to the entire outer surface of the back sheet 20. However, the cover sheet 24 may be bonded only to a portion of the outer surface of the back sheet 20 that is not encapsulated by the abdominal exterior body 60 and the back exterior body 62 and is exposed to the outside. Such a configuration can reduce the sheet interposed between the backsheet 20 and the abdominal exterior body 60 and the back exterior body 62. Therefore, when the design etc. are attached | subjected to the back seat | sheet 20, it becomes easy to visually recognize the design etc. through the abdominal exterior body 60 and the back exterior body 62, and it is preferable at the point which design property improves.

[2-3] Solid gathering:
1B and 1D, the absorbent article of the present invention includes a pair of left and right three-dimensional gathers 26 (26a, 26b) that are made of a water-repellent sheet 32 and are disposed on both sides of the absorbent body 22. Is preferred.

  A three-dimensional gather can be comprised according to the conventional absorbent article. For example, as shown in FIG. 1D, a configuration in which a water-repellent sheet 32 for forming a three-dimensional gather 26 is separately attached to the absorbent main body 14 to form the three-dimensional gather 26 integrally with the absorbent main body 14 is often used.

  In this case, as shown in FIG. 1D, a stretched three-dimensional gather stretchable material 36 may be sandwiched between the layers of the water-repellent sheet 32 and fixed. As the water-repellent sheet, it is preferable to use a non-woven sheet obtained by a method such as card embossing or spunbond, particularly a non-woven sheet such as SMS or SMMS having high waterproofness.

  As shown in FIGS. 1B and 1D, in the absorbent article 1A, side edge elastic members 38 are arranged on both side edges of the three-dimensional gather 26 in addition to the three-dimensional gather elastic material 36. When the side edge elastic material 38 is arranged in this manner, the front thigh elastic material 64, the side edge elastic material 38, and the thigh back elastic material 66 are integrated to fit around the wearer's leg, thus improving fit. There is an advantage of doing.

  Examples of the three-dimensional gathers include inward gathers, outward fall gathers, C-fold gathers and Z-fold gathers in which bent portions and folded portions are formed in a part of the height direction. Among these, in terms of high leakage prevention properties, for example, inward gathers such as the three-dimensional gathers 26 shown in FIGS. 1B and 1D are preferable.

[3] Production method of the present invention:
Hereinafter, the manufacturing method of the absorbent article of this invention is demonstrated for every process, referring FIG. FIG. 4 shows a method for manufacturing the absorbent article 1A shown in FIGS. 1A to 1E for each step. For the convenience of drawing, in FIG. 4, a part of the front thigh elastic material continuum Er1, the thigh back elastic material continuum Er2, the waist elastic material continuum Er3 and Er4, and the tammy elastic material continuum Er5 and Er6 are discarded. ing.

[3-1] Step (A):
As shown in FIG. 4, (A) process P1 sends out the outer sheet | seat continuous body S1 which is a strip | belt-shaped nonwoven fabric, and the thigh front elastic material continuous body which is a long elastic material is along the edge E9 corresponded to the leg edge. In this step, Er1 is disposed, and then the inner sheet continuum S2 that is a strip-shaped nonwoven fabric is bonded to the outer sheet continuum S1 to form the abdominal exterior continuum 80.

  Specifically, adhesive is applied to the outer sheet continuum S1, and the stretched thigh front elastic material continuum Er1 is arranged so as to be parallel to the edge E9 corresponding to the leg edge of the outer sheet continuum S1. Then, the inner sheet continuous body S2 is bonded to the surface of the outer sheet continuous body S1. As a result, the abdominal exterior body continuum 80 in which the thigh front elastic member continuum Er1 is fixed in an extended state between the outer sheet continuum S1 and the inner sheet continuum S2 is obtained.

  There is no restriction | limiting in particular in the method of apply | coating an adhesive agent. For example, contact coating such as shim coating or non-contact coating such as curtain coating can be performed.

  As shown in FIG. 4, the waist elastic material continuum Er3 and the tammy elastic material continuum Er5 may be fixed in the extended state simultaneously with fixing the thigh front elastic material continuum Er1 in the extended state.

[3-2] Step (B):
As shown in FIG. 4, (B) process P2 sends out outer sheet | seat continuous body S3 which is a strip | belt-shaped nonwoven fabric, and the thigh back elastic material which is a long elastic material is along the edge E10 corresponded to the leg edge. It is a step of forming the back exterior body continuum 82 by arranging the continuum Er2 and then bonding the inner sheet continuum S4, which is a strip-shaped nonwoven fabric, so as to overlap the outer sheet continuum S3. .

  Specifically, an adhesive is applied to the outer sheet continuum S3, and the stretched thigh back elastic material continuum Er2 is arranged so as to be parallel to the edge E10 corresponding to the leg edge of the outer sheet continuum S3. Then, the inner sheet continuous body S4 is bonded to the surface of the outer sheet continuous body S3. Thereby, the back exterior body continuous body 82 in which the thigh back elastic material continuous body Er2 is fixed in an extended state between the outer sheet continuous body S3 and the inner sheet continuous body S4 is obtained. In this example, the waist elastic material continuum Er2 is fixed in the stretched state, and the waist elastic material continuum Er4 and the tammy elastic material continuum Er6 are fixed in the extended state.

[3-3] Step (C):
As shown in FIG. 4, (C) process P3 sends out the abdominal exterior body continuum 80 and the back exterior body continuum 82 so that the edges E9 and E10 corresponding to the leg edges are adjacent to each other. The absorptive body continuum 80 and the back exterior body continuum 82 are bridged between the absorptive body continuum 80 and the back exterior body continuum 82 so that the absorbent main body 14 that is an enclosed absorbent pad is bridged between In this process, the fixing body 84 is formed by intermittently fixing the fixing body 84.

  The absorbent main body 14 can be fixed with an adhesive such as a hot melt adhesive.

  In addition, as shown to FIG. 1D and FIG. 1E, the absorptive main body 14 arrange | positions the absorber 22 wrapped in the hydrophilic sheet | seat (upper tissue 54, the lower tissue 56) on the upper surface of the back sheet | seat 20, Furthermore, the The top sheet 18 is disposed on the upper surface, and the periphery of the absorber 22 is sealed so as to be sandwiched between the top sheet 18 and the back sheet 20. The absorbent main body 14 shown in FIGS. 1D and 1E separately forms a pair of three-dimensional gathers 26 by bonding a water-repellent sheet 32 together. These processes can be manufactured by a continuous manufacturing process by using a long sheet material as a constituent material of each member.

  In the case where the joining portion is formed of the fastening member, in the step (C), the abdominal exterior is provided in the region on the side of the edges E11 and E12 corresponding to the waist edges of the abdominal exterior continuum 80 and the back exterior continuum 82. A fastening member for fixing the body continuum 80 and the back exterior body continuum 82 is fixed, and a joint for joining the abdominal exterior body continuum 80 and the back exterior body continuum 82 is formed by the fastening member, and the abdominal exterior body The region on the side of the edge E9, E10 corresponding to the leg edge of the continuous body 80 and the back exterior body continuous body 82 may be formed with a non-joined portion without fixing the fastening member.

  In the step (C), the absorbent main body 14, the abdominal exterior body continuum 80, and the back exterior body continuum 82 are separated from the region corresponding to the non-joined portion of the abdominal exterior body and the back exterior body and the absorbent body. It is preferable that a fixed body is formed by joining together at a portion overlapping with 14 to form a fixed portion.

  Thus, the absorbent main body 14 and the abdominal exterior body 60 and the back exterior body 62 as shown in FIG. 1E are separated from the region between the non-joined portions 68 and 70 of the abdominal exterior body 60 and the back exterior body 62. 1 A of absorbent articles fixed by the fixing | fixed part 72 and 74 mutually joined in the superimposition part with can be obtained. Specifically, an adhesive such as a hot melt adhesive may be applied to the corresponding portions of the abdominal exterior body continuum 80 and the back exterior body continuum 82 to fix the absorbent main body 14.

[3-4] Step (D):
As shown in FIG. 4, in (D) process P4, the edge E11 corresponding to the waist edge of the abdominal exterior body continuum 80 and the edge E12 corresponding to the waist edge of the back exterior body continuum 82 coincide. In this way, the fixed body 84 is folded in such a manner that the abdominal exterior body continuum 80 and the back exterior body continuum are formed in the regions on the end edges E11 and E12 side corresponding to the waist edges of the abdominal exterior body continuum 80 and the back exterior body continuum 82. 82, and the region on the side of the edges E9 and E10 corresponding to the leg edges of the abdominal exterior body continuum 80 and the back exterior body continuum 82 is abdominal exterior body continuous. In this process, the absorbent article continuum 86 is formed by forming the non-joining portions 68 and 70 without joining the body 80 and the back exterior continuum 82.

  In the example shown in FIG. 4, the joint 8 is formed by joining the gaps of the absorbent main body 14 intermittently fixed in the folded fixed body 84 into a pair of lines by heat sealing. Thus, the absorbent article continuous body 86 is formed.

[3-5] Step (E):
As shown in FIG. 4, (E) Step P5 is a step in which the absorbent article continuum 86 is cut along the joint 8 to obtain a plurality of absorbent articles 1A.

  In the example shown in FIG. 4, a plurality of absorbent articles 1 </ b> A are obtained by separating the absorbent article continuum 86 at a portion between two sets of line-like joint portions 8 (8 a, 8 b).

  The absorbent article of the present invention can be suitably used as an absorbent article for infants and adults.

1A, 100A, 100B: absorbent article, 2: front body, 4: crotch, 6: back body, 8, 8a, 8b: joint, 10: waist opening, 12, 12a, 12b: leg opening, 14: Absorbent body, 16: Exterior body, 18: Top sheet, 20: Back sheet, 22: Absorber, 24: Cover sheet, 26, 26a, 26b: Solid gather, 32: Water repellent sheet, 36: Solid gather Elastic material, 40 :, 42: Waist elastic material, 44: Tammy elastic material, 54: Upper tissue, 56: Lower tissue, 60: Abdominal exterior body, 62: Back exterior body, 64: Front thigh elastic material, 66: Thigh Back stretchable material, 68, 70: non-bonded portion, 72, 74: fixed portion, 76, 78: hole, 80: continuous body of abdominal exterior body, 82: continuous body of back exterior body, 84: fixed body, 86: absorbent Continuous article, E1, E2: side edge, E3: wafer Toe edge, E4: Leg edge, E5, E6: Side edge, E7: Waist edge, E8: Leg edge, E9, E10: End edge corresponding to leg edge, E11, E12: Waist edge Corresponding edge, S1: outer sheet continuous body, S2: inner sheet continuous body, S3: outer sheet continuous body, S4: inner sheet continuous body, Er1: front thigh elastic material continuous body, Er2: thigh sole elastic body continuous body , Er3, Er4: Waist elastic material continuum, Er5, Er6: Tammy elastic material continuum, P1: (A) process, P2: (B) process, P3: (C) process, P4: (D) process, P5 : (E) Process.

Claims (6)

An abdominal exterior body comprising a sheet body and encapsulating the wearer's abdomen, a back exterior body comprising a sheet body and encapsulating the wearer's back side, and an absorbent pad containing the absorbent body and worn An absorbent main body encapsulating the crotch side of the person,
The absorbent main body is fixed to the abdominal exterior body and the back exterior body so as to be bridged between the abdominal exterior body and the back exterior body,
Of the side edge portions of the abdominal exterior body and the back exterior body, a joint portion that joins the side edge portions of both members is formed in the region on the waist edge side, and both members are in the region on the leg edge side. A non-joined part that is not joined is formed,
A waist stretchable material and a tammy stretchable material are fixed in an extended state toward the left-right direction in a region between the joint portions of the abdominal exterior body and a region between the joint portions of the back exterior body, and
In the region between the non-joined portions of the abdominal exterior body, a thigh front elastic member is fixed in an extended state in the left-right direction, and in the region between the non-joined portions of the back exterior body, An absorbent article in which the elastic material on the back of the thigh is fixed in an extended state in the left-right direction ,
The contraction force acting on the abdominal exterior body and the back exterior body by the front thigh elastic material and the thigh back elastic material is smaller than the contraction force acting on the waist elastic material and the tammy elastic material. Absorbent article composed of   The absorptive main body, the abdominal exterior body, and the back exterior body are joined to each other in a region between the non-joined portion of the abdominal exterior body and the back exterior body and the absorbent body. The absorbent article of Claim 1 currently fixed by the fixing | fixed part.   The absorptive article according to claim 1 or 2 in which said joined part is formed of a fastening member which fixes side edges of both members. A portion corresponding to the circumference of the trunk of the outer sheet continuum by feeding out the outer sheet continuum which is a belt-shaped nonwoven fabric, disposing a waist elastic material continuum along the edge corresponding to the waist edge of the outer sheet continuum A tammy stretchable material continuum, and along the edge corresponding to the leg edge of the outer sheet continuum , a thigh front stretchable material continuum that is a long stretchable material,
Next, an abdominal exterior body continuum is formed by laminating an inner sheet continuum that is a belt-shaped nonwoven fabric so as to overlap the outer sheet continuum (A),
A portion corresponding to the circumference of the trunk of the outer sheet continuum by feeding out the outer sheet continuum which is a belt-shaped nonwoven fabric, disposing a waist elastic material continuum along the edge corresponding to the waist edge of the outer sheet continuum The tammy stretchable material continuum is disposed on the thigh back stretchable material continuum, which is a long stretchable material, along the edge corresponding to the leg edge of the outer sheet continuum .
Next, by bonding the inner sheet continuous body which is a belt-shaped nonwoven fabric so as to overlap with the outer sheet continuous body, a back exterior body continuous body is formed (B),
Send out the abdominal exterior body continuum and the back exterior body continuum so that edges corresponding to leg edges are adjacent to each other,
The abdominal exterior body continuum and the back exterior body continuum so as to bridge an absorbent main body that is an absorbent pad including an absorbent body between the abdominal exterior body continuum and the back exterior body continuum. (C) step of forming a fixed body by intermittently fixing to
The fixed body is folded so that an end edge corresponding to the waist edge of the abdominal exterior body continuum and an end edge corresponding to the waist edge of the back exterior body continuum coincide with each other,
Forming a joint for joining the abdominal exterior body continuum and the back exterior body continuum in a region on an edge side corresponding to a waist end edge of the abdominal exterior body continuum and the back exterior body continuum; The region on the edge side corresponding to the leg end edge of the abdominal exterior body continuum and the back exterior body continuum is formed by forming a non-joined portion without joining the abdominal exterior body continuum and the back exterior body continuum. Forming the absorbent article continuum (D) step;
A method for producing an absorbent article, comprising the step (E) of cutting the absorbent article continuum along the joint and obtaining a plurality of absorbent articles ,
In the step (A) and the step (B), the contraction force acting on the abdominal exterior body continuum and the back exterior body continuum by the front thigh elastic material continuum and the thigh back elastic material continuum, The front thigh elastic material continuum, the thigh back elastic material continuum, the waist elastic material continuum, and the waist elastic material continuum and the tummy elastic material continuum The manufacturing method of an absorbent article which arrange | positions the said tammy elastic material continuous body .   The step (C) includes a region between the absorbent main body, the abdominal exterior body continuum, and the back exterior body continuum corresponding to the non-joined portion of the abdominal exterior body and the back exterior body; The method for manufacturing an absorbent article according to claim 4, wherein the fixed body is formed by joining the overlapping portions with the absorbent main body.   Fastening in which the step (D) fixes the abdominal exterior body continuum and the back exterior body continuum to a region on an edge side corresponding to a waist edge of the abdominal exterior body continuum and the back exterior body continuum. The member is fixed, and the fastening member forms the joining portion for joining the abdominal exterior body continuum and the back exterior body continuum, and leg edges of the abdominal exterior body continuum and the back exterior body continuum 6. The method for manufacturing an absorbent article according to claim 4, wherein a region on the edge side corresponding to the step forms the non-joined portion without fixing the fastening member.

Images