JP2018033530A - Production method of underpants type absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper having a leg circumference extending portion which is less likely to be turned over when worn and which can easily maintain a surface shape. A method for manufacturing a pants-type absorbent article (1), comprising an absorber (12) whose longitudinal direction is along the longitudinal direction and an exterior sheet (14) stacked on the non-skin side of the absorber. In the lateral direction, both ends of the exterior sheet (14) are folded back from the outside to the inside, and the folded portions are welded to form a welding region (62) having a predetermined length in the lateral direction. A welding region forming step, an elastic member arranging step of arranging an elastic member (61) that expands and contracts in the vertical direction in a predetermined region of the exterior sheet (14), and both ends of the exterior sheet (14) from the outside to the inside in the lateral direction. By folding back again, at least a part of the elastic member forms an extension portion (60) around the leg that overlaps the welding region (61) in the lateral direction while extending to both sides of the absorber in the lateral direction. It has a step of forming an extension portion around the leg. [Selection diagram] Fig. 4

Description

  The present invention relates to a method for manufacturing a pant-type absorbent article.

  An example of an absorbent article is a pants-type disposable diaper. In such a pants-type disposable diaper, in order to prevent side leakage of excrement, solid gathers (leak barriers) standing along both side edges of the absorber, and both lateral sides of the absorber In general, leg gathers (leg extension portions) are provided to extend to the leg openings. For example, Patent Document 1 discloses a method of forming a three-dimensional gather and a leg gather with a sheet member by bending the sheet member on which the absorber is placed at predetermined locations on both lateral sides of the absorber. .

JP 2010-240110 A

  In the pants-type disposable diaper described in Patent Document 1, by arranging an elastic member (for example, rubber thread) that expands and contracts in the vertical direction in a leg gather (leg extension part), the leg part extends with respect to the leg extension part. Stretching force along is applied. However, since the leg extension part is formed of a flexible sheet member, when the pants-type disposable diaper is worn, when the stretching force acts on the leg extension part, a twist or turn may occur. In some cases, the leg extension portion may be difficult to maintain the surface shape. Thereby, there existed a possibility that a fit property might deteriorate in a wearer's leg periphery, or it might be difficult to suppress the side leakage of excrement.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to provide a pants-type disposable diaper having leg leg extending portions that are less likely to be turned up when worn and that can easily maintain the surface shape. Is to provide.

The main invention for achieving the above object is an absorbent body having a longitudinal direction, a transverse direction, and a thickness direction, the longitudinal direction being along the longitudinal direction, and an exterior layer stacked on the non-skin side of the absorbent body A pants-type absorbent article comprising a sheet, and in the lateral direction, both end portions of the exterior sheet in a deployed state are folded back from the outside to the inside, and the exterior sheet is folded in the thickness direction. A welded region forming step of welding the formed portions to form a welded region having a predetermined length in the lateral direction, and an elastic member arrangement for arranging an elastic member that expands and contracts in the vertical direction in the predetermined region of the exterior sheet And by folding back both ends of the exterior sheet from the outside to the inside in the lateral direction, at least a part of the elastic member is moved forward in the lateral direction while extending to both sides of the absorbent body in the lateral direction. And having a leg extending portion forming step of forming a leg extending portion which overlaps the weld region, and a method for producing pant-type absorbent article.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the pants type disposable diaper which has a leg periphery extension part which cannot turn over easily at the time of wear, and is easy to maintain a surface shape can be provided.

1 is a schematic perspective view of a pants-type disposable diaper 1. FIG. It is the schematic plan view which looked at the diaper 1 of the expansion | deployment and expansion | extension state from the skin side surface side. It is a schematic sectional drawing of the diaper 1. It is a figure showing the flow of absorptive main body 10 manufacture. It is the top view and sectional drawing explaining the LSG elastic member arrangement | positioning process. It is the top view and sectional drawing explaining a welding area | region formation process. It is a figure which expands and represents the area | region A of FIG. It is the top view and sectional drawing explaining an elastic member arrangement | positioning process. It is the top view and sectional drawing explaining an absorber transfer process. It is the top view and sectional drawing explaining a leg periphery extension part formation process. FIG. 11A to FIG. 11C are diagrams for explaining modifications of the lateral welding region 62.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  A pants-type absorbent article comprising: an absorbent body having a longitudinal direction, a lateral direction, and a thickness direction, wherein a longitudinal direction is along the longitudinal direction; and an exterior sheet that is stacked on a non-skin side of the absorbent body. In the production method, in the lateral direction, both end portions of the exterior sheet in a developed state are folded back from the outside to the inside, and the portions where the exterior sheet is folded in the thickness direction are welded in the lateral direction. A welding region forming step of forming a welding region having a predetermined length, an elastic member arranging step of arranging an elastic member that expands and contracts in the vertical direction in the predetermined region of the exterior sheet, and the exterior sheet in the lateral direction. By folding back both ends from the outside to the inside again, while extending to both sides of the absorbent body in the transverse direction, in the transverse direction, at least a part of the elastic member overlaps with the welding region, Formation And having a leg extending portion forming step that, the a method for producing pant-type absorbent article.

  According to such a method for manufacturing a pant-type absorbent article, the provision of the weld region suppresses the contraction or turning of the leg extension part in the lateral direction, and the leg extension part is lateral. It is possible to provide a pant-type absorbent article in which a surface shape having a width in the direction is easily maintained. In addition, a force that contracts in the vertical direction by the leg elastic member acts, so that a large number of wrinkles along the lateral direction are formed on the surface of the leg extension portion, and the pants having a good touch due to the unevenness of the wrinkles A mold absorbent article can be provided.

  In this method of manufacturing a pant-type absorbent article, it is desirable that in the elastic member arranging step, the elastic member is arranged so as to overlap at least a part of the welding region in the lateral direction.

  According to such a method for manufacturing a pant-type absorbent article, welding can be performed without cutting the leg-hole elastic member. In other words, the welded region can be formed in the region overlapping the leg-hole elastic member without damaging the stretching force of the leg-hole elastic member in the leg-hole extending portion. Accordingly, it is possible to easily manufacture a pants-type absorbent article having leg leg extending portions that are less likely to be turned up when worn and easily maintain the surface shape.

  In this method of manufacturing a pant-type absorbent article, the welding region has a first welding region and a second welding region, and in the lateral direction, the first welding region and the second welding region. It is desirable that the welding area is discontinuous.

  According to such a method for manufacturing a pant-type absorbent article, the outer sheet can be provided with a portion having a high rigidity and a portion having a low rigidity, with a portion where a welding region is formed in the lateral direction and a portion where the welding region is not formed. it can.

  In the manufacturing method for such a pant-type absorbent article, in the leg extension portion forming step, the exterior sheet is a predetermined portion between the first welding region and the second welding region in the lateral direction. It is desirable to be folded in position.

  According to such a method for producing a pant-type absorbent article, the rigidity of the exterior sheet does not become too high at the predetermined position, and the exterior sheet can be firmly bent at the predetermined position. Thereby, it becomes easy to form a leg periphery extension part in the shape of a beautiful plane.

  In such a method for manufacturing a pant-type absorbent article, it is desirable that the welding region is formed to be inclined at a predetermined angle with respect to the lateral direction.

  According to such a manufacturing method of the pant-type absorbent article, the welding region is formed while the points to which pressure is applied are sequentially moved with the rotation of the embossing roller that forms the welding region. Defects are less likely to occur and welding is stable. Moreover, since the location where a pressure is applied moves sequentially, the protrusion (for example, ultrasonic horn) provided in the outer peripheral surface of an embossing roller becomes difficult to wear, and manufacture of a pants-type absorbent article can be performed efficiently.

  In this method of manufacturing a pant-type absorbent article, it is preferable that the weld region is formed by arranging a plurality of dots in the horizontal direction.

  According to such a method for manufacturing a pant-type absorbent article, the welded portions (dots) are reduced in size by being partially welded by the dot-shaped welded portions, and ultrasonic vibrations and the like are reduced to one point. It becomes easy to add repeatedly by concentrating on. Thereby, it can weld stably about the whole welding area | region.

  In this method of manufacturing a pant-type absorbent article, a pair of leak-proof wall portions standing on the skin side of the wearer is formed on both sides of the absorbent body in the lateral direction, and the welding region In the direction, it is desirable that the leakage prevention wall portion is formed at a position that does not overlap with the position of the base point where the leakage prevention wall portion stands.

  According to such a method for manufacturing a pant-type absorbent article, the rigidity of the exterior sheet at the base point portion does not overlap the portion (side joint portion 53) that becomes the base point where the leak-proof wall portion stands up and the welding region. Is suppressed from increasing. Thereby, an exterior sheet becomes easy to bend naturally with the position of a side junction part as a starting point, and can make a leak-proof wall part stand up easily.

  In this method for manufacturing a pant-type absorbent article, the leg-around extension portion is provided with a plurality of the elastic members arranged in the horizontal direction, and among the plurality of elastic members, the innermost side in the horizontal direction. It is desirable that the elastic member provided on the side is disposed between the absorber and the welding region in the lateral direction.

  According to such a manufacturing method of the pant-type absorbent article, the elastic member (61a) provided on the innermost side in the lateral direction contracts, so that when the pant-type absorbent article is worn, Of these, the portion on the outer side in the lateral direction from the elastic member (61a) serves as a base point to be lifted to the wearer's skin side, and the standing height of the leg extension portion is ensured. Thereby, it becomes easy to make the leg extension part closely_contact | adhere to a wearer's leg periphery.

  In this method of manufacturing a pant-type absorbent article, the leg-hole extending portion is provided with a plurality of the elastic members arranged side by side in the lateral direction, and among the plurality of elastic members, the outermost side in the lateral direction It is desirable that the elastic member provided on the outer side of the leg extending portion is disposed in the lateral direction.

  According to such a method for manufacturing a pant-type absorbent article, the leg-around extension is easily brought into close contact with the wearer's leg by the contraction force of the elastic member (61d) provided on the outermost side in the lateral direction. Thereby, even if it is a case where a leg extension part cannot maintain a planar shape in a horizontal direction outer side edge part, it becomes easy to suppress that the fitting property of a leg extension part deteriorates.

  In such a method for manufacturing a pant-type absorbent article, it is desirable that a liquid-impermeable back sheet is provided on the skin side of the elastic member disposed so as to overlap the welding region in the lateral direction.

  According to the manufacturing method of such a pants-type absorbent article, the back sheet is arranged so as to cover the skin side of the leg elastic member, thereby suppressing the leg elastic member from being exposed to the skin side, The adhesive applied to the surface of the leg elastic member is prevented from adhering to the wearer's body. Moreover, since it is suppressed that an end junction part or a side junction part and a leg periphery elastic member contact, it is suppressed that the contractile force by a leg periphery elastic member acts on a waist part.

=== Embodiment ===
The following embodiments will be described by taking “pants-type disposable diapers” as an example of pants-type absorbent articles according to the present invention. The pants-type disposable diaper of this embodiment can be used for both infants and adults. The pants-type absorbent article according to the present invention can be used as, for example, a sanitary shorts napkin other than disposable diapers.

<Basic configuration of pants-type disposable diapers>
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter also simply referred to as “diaper 1”). FIG. 2 is a schematic plan view of the developed and extended diaper 1 as viewed from the side of the skin. FIG. 3 is a schematic sectional view of the diaper 1. In addition, the drawings other than FIG. 1 show a state in which the elastic member included in the diaper 1 is extended to the extent that the heel of the diaper 1 cannot be visually recognized. Specifically, a state is shown in which each member (for example, an exterior sheet 14 described later) constituting the diaper 1 is stretched until the dimension of the member coincides with or close to the dimension of the member itself.

  As shown in FIG. 1, the diaper 1 which is a pants type has a vertical direction, a horizontal direction, and a front-rear direction, and the diaper 1 is formed with a waistline opening BH and a pair of leg-hole openings LH. In the vertical direction, the waist opening BH side is the upper side, and the side that is the crotch of the wearer is the lower side. In the front-rear direction, the side that becomes the wearer's stomach side is the front side, and the side that becomes the wearer's back side is the rear side. Moreover, the diaper 1 has a thickness direction as shown in FIG. 3, and the side which contacts a wearer in thickness direction is made into the skin side, and the other side is made into the non-skin side.

  The diaper 1 is a so-called three-piece type, and has an absorbent main body 10 and a pair of waistline portions 20 and 30. The absorptive main body 10 has a substantially rectangular shape in plan view, and its longitudinal direction is along the vertical direction. The waist portions 20 and 30 have a substantially rectangular shape in plan view, and the longitudinal direction thereof is along the horizontal direction. Of the pair of waistline portions 20, 30, the one that covers the wearer's stomach side portion is also referred to as the front waistline portion 20, and the one that covers the wearer's back side portion is also referred to as the back waistline portion 30.

  As shown in the unfolded state of FIG. 2, the laterally central portion of the front waistline portion 20 is located on one end side in the longitudinal direction of the absorbent main body 10, and on the other end side in the longitudinal direction of the absorbent main body 10. The central portion in the lateral direction of the rear waistline portion 30 is located. And the non-skin side surface of the absorptive main body 10 and the skin side surface of a pair of waist part 20 and 30 are joined by the adhesive agent etc. 2, the absorbent main body 10 is folded in half at a substantially central portion in the longitudinal direction so that the front waistline portion 20 and the rear waistline portion 30 overlap with each other, and both side portions 20a in the lateral direction of the front waistline portion 20 The diaper 1 becomes a pants type by joining the lateral side portions 30a of the rear waistline portion 30 in the lateral direction.

  Each of the front waistline portion 20 and the rear waistline portion 30 includes two flexible sheets (21 and 21, 31 and 31) such as non-woven fabric and a plurality of elastic members 22 and 32 such as thread rubber that expands and contracts in the lateral direction. Prepare. In the following description, the elastic members 22 and 32 are also referred to as the waistline elastic members 22 and 32. The plurality of waistline elastic members 22 and 32 are arranged side by side at intervals in the vertical direction, and are fixed between two sheets (21 and 21, 31 and 31) in a state of extending in the horizontal direction. Yes. Therefore, the front waistline part 20 and the back waistline part 30 can be expanded and contracted in the lateral direction, and fit around the wearer's waistline.

  As shown in FIG. 3, the absorbent main body 10 includes a top sheet 11, an absorber 12, a back sheet 13, and an exterior sheet 14 in order from the skin side in the thickness direction. The top sheet 11 may be a liquid-permeable sheet, and examples thereof include a hydrophilic air-through nonwoven fabric and a spunbond nonwoven fabric. The back sheet 13 may be a liquid impermeable sheet, and examples thereof include a polyethylene film and a polypropylene film. The top sheet 11 and the back sheet 13 are sized to cover the entire absorbent body 12. Moreover, in this embodiment, the both sides of the horizontal direction of the top sheet 11 are folded in the non-skin side surface side of the absorber 12. FIG. The exterior sheet 14 may be a liquid permeable sheet or a liquid impermeable sheet. However, in this embodiment, since the leak-proof wall part 50 is formed by the exterior sheet 14, a hydrophobic SMS nonwoven fabric etc. can be illustrated as the exterior sheet 14. FIG.

  The absorbent body 12 has a rectangular shape in plan view, and includes an absorbent core 121 that absorbs liquid and a core wrap sheet 122 that covers the outer peripheral surface of the absorbent core 121. The absorbent core 121 is formed by molding a liquid absorbent material into a predetermined shape. In the present embodiment, the absorbent core 121 has a substantially hourglass shape with a narrowed central portion in the longitudinal direction. As a liquid absorptive material, what contained superabsorbent polymer (what is called SAP) etc. in liquid absorptive fibers, such as a pulp fiber, can be illustrated. Examples of the core wrap sheet 122 include liquid permeable sheets such as tissue paper and nonwoven fabric. The core wrap sheet 122 may not be provided.

  Moreover, the absorptive main body 10 is provided with a pair of leak-proof wall part 50 and a pair of leg periphery extension part 60 (a pair of extension part). Although details will be described later, in this embodiment, as shown in FIG. 3 and FIG. 4, the laterally opposite side portions of the single exterior sheet 14 are folded to form a pair of leak-proof wall portions 50 and a pair of legs. The extension part 60 is integrally formed.

  The pair of leak-proof wall portions 50 are provided on both lateral sides of the absorbent body 12 along the longitudinal direction of the absorbent main body 10. In detail, it is provided over the position extended from the position which overlaps with the absorber 12 in a horizontal direction. Each leak-proof wall 50 includes an elastic member 51 (hereinafter also referred to as “LSG elastic member 51”) that expands and contracts in the longitudinal direction (longitudinal direction of the diaper 1), and an exterior sheet 14 that forms the leak-proof wall 50. A pair of end joint portions 52 and side joint portions 53 that are joined to the top sheet 11 and the back sheet 13 are provided. The pair of end joints 52 are disposed at both ends in the longitudinal direction of the absorbent main body 10, the side joints 53 extend from one end to the other end in the longitudinal direction of the absorbent main body 10, and are more than the end joints 52. It is arranged outside in the horizontal direction. Therefore, in the leak-proof wall part 50, the site | part of the exterior sheet | seat 14 between a pair of end junction parts 52 is a wearer side (skin side of thickness direction) from the side junction part 53 by shrinkage | contraction of the LSG elastic member 51. Can stand up to. Therefore, the excrement that has flowed laterally is blocked by the leak-proof wall portion 50.

  The pair of leg extension portions 60 are portions extending to both outer sides of the absorbent body 12 in the lateral direction. Specifically, a portion from the lateral outer end of the absorbent body 12 to the lateral outer end of the absorbent main body 10 is defined as a leg extension 60. Each leg extension portion 60 extends and contracts in the longitudinal direction (vertical direction of the diaper 1), and is provided with four elastic members 61 (hereinafter referred to as “leg leg elastic members 61”) spaced apart in the lateral direction. Also called). The leg extension portion 60 is easily stretched along the longitudinal direction by the leg circumference elastic member 61, so that the leg circumference extension portion 60 can easily fit around the wearer's leg.

  Each leg extension 60 is provided with a plurality of “lateral welding regions 62 (welding regions in the present invention)” having a predetermined length in the lateral direction. As shown in FIG. 3, the plurality of lateral welding regions 62 includes a plurality of first lateral welding regions 63 positioned on the skin side in the thickness direction and a plurality of second welding regions positioned on the non-skin side in the thickness direction. And a horizontal welding region 64. The plurality of first lateral welding regions 63 and the plurality of second lateral welding regions 64 are both arranged side by side in the longitudinal direction over the entire region in the longitudinal direction of the leg extension portion 60. . As shown in FIG. 2, the horizontal welding region 62 is provided to be inclined at a predetermined angle in the horizontal direction. However, the horizontal welding region 62 is not necessarily inclined as long as it is a region having a predetermined length in the horizontal direction. Also good.

  Each leg extension 60 is provided with a “longitudinal weld region 66” extending in the longitudinal direction (longitudinal direction) on the inner side in the lateral direction than the lateral weld region 62. The longitudinal welding region 66 is also arranged over the entire region in the longitudinal direction of the leg extension 60, and is positioned on the non-skin side in the thickness direction and the first longitudinal welding region 67 located on the skin side in the thickness direction. And a second vertical welding region 68.

  Examples of elastic members (22, 32, 51, 61) included in the front waistline portion 20, the rear waistline portion 30, the leak-proof wall portion 50, and the leg-hole extension portion 60 include thread-like elastic members such as rubber thread. However, it is not limited to this. Instead of the thread rubber, for example, one or more sheet-like elastic members such as a stretchable film or a stretchable nonwoven fabric may be arranged. Further, the drawing shows only a portion (so-called effective length portion) that exhibits elasticity in the elastic member. Therefore, a portion of the elastic member that does not exhibit stretchability may exist outside the illustrated elastic member in the longitudinal direction. Further, the arrangement and the number of elastic members are not limited to the illustrated configuration.

<The manufacturing method of the absorptive main body 10>
Then, the manufacturing method of the absorptive main body 10 provided with a pair of leak-proof wall part 50 and the leg periphery extension part 60 is demonstrated. FIG. 4 is a diagram illustrating a flow of manufacturing the absorbent main body 10. The diaper 1 of this embodiment is continuously manufactured by implementing each process of S101-S105 shown by FIG. 4 in a manufacturing line.

  In this embodiment, each process of S101-S105 is implemented while the base material sheet of the absorptive main body 10 is conveyed at a predetermined conveyance speed along a predetermined conveyance direction. The “base material sheet of the absorbent main body 10” is an exterior continuous sheet 141 that is continuously formed in a state where a plurality of exterior sheets 14 are connected in the longitudinal direction (longitudinal direction) in FIG. The direction transported along the direction is the transport direction. In the following description, the direction along the conveyance direction (that is, the longitudinal direction of the exterior sheet 14) is also referred to as MD direction (corresponding to the vertical direction), and the direction orthogonal to the MD direction is also referred to as CD direction (corresponding to the horizontal direction).

(S101)
First, the LSG elastic member arrangement | positioning process which arrange | positions the LSG elastic member 51 of the leak-proof wall part 50 mentioned above with respect to the base material sheet (exterior sheet | seat 14) conveyed in MD direction is performed (S101). FIG. 5 is a plan view and a cross-sectional view illustrating the LSG elastic member arranging step. In FIG. 5, the outer sheet 14 is shown in a developed state. Further, in FIG. 5, for the sake of simplification of description, the exterior continuous sheet 141 is cut in units of products (diaper 1) to represent the above-described exterior sheet 14. The same applies to FIGS. 6 to 10 described later.

  In the LSG elastic member arrangement step (S101), as shown in FIG. 5, the outer sheet 14 (outer continuous sheet 141) is extended in the MD direction (vertical direction) to a predetermined position f1 on both sides in the CD direction (lateral direction). The LSG elastic member 51 in the state is disposed along the MD direction. An adhesive such as a hot melt adhesive (HMA) is applied to the surface of the LSG elastic member 51, and the LSG elastic member 51 is joined to the exterior sheet 14 by the adhesive. Thereby, the stretchability of the vertical direction (longitudinal direction) is expressed in the portion where the LSG elastic member 51 is joined at the predetermined position f1 of the exterior sheet 14, and when the diaper 1 is formed in a pants shape, the leak-proof wall portion 50 Can stand on the skin side of the wearer.

  In S101, an adhesive (for example, a hot melt adhesive HMA) is provided (applied) along the MD direction in the region inside the CD direction (lateral direction) from the predetermined position f1 as shown in FIG. ) To form the LSG bonding portion 55. The LSG adhesion portion 55 is an adhesion portion for joining the exterior sheets 14 folded in the thickness direction when the exterior sheet 14 is folded at the predetermined position f1 in the next step (S102). Note that the LSG bonding portion 55 may be formed before the LSG elastic member 51 is disposed.

(S102)
Next, both end portions in the CD direction (lateral direction) of the unfolded exterior sheet 14 (exterior continuous sheet 141) are folded back from the outside to the inside, and the lateral weld region 62 and the portion where the exterior sheet 14 is folded in the thickness direction A welding region forming step (S102) for forming the vertical welding region 66 is performed. FIG. 6 is a plan view and a cross-sectional view for explaining the welding region forming step. FIG. 7 is an enlarged view of the region A in FIG.

  In the welding region forming step (S102), first, the both ends of the exterior sheet 14 are set from the outside in the CD direction (lateral direction) to the inside with the predetermined position f1 where the LSG elastic member 51 (LSG elastic member) is disposed as the folding position. Wrapped to That is, the exterior sheet 14 is folded in the thickness direction so as to sandwich the LSG elastic member 51 with the position f1 where the LSG elastic member 51 is provided as the folding base point, and is joined by the LSG bonding portion 55. The part to be joined is a part that stands as the leak-proof wall part 50 when the diaper 1 is worn, and the strength of the leak-proof wall part 50 is secured by joining the folded exterior sheets 14 to each other. It becomes easy to suppress that the leak-proof wall part 50 falls or a shape collapses. When folding the exterior sheet 14, a folding mechanism (sailor) is used that folds the exterior continuous sheet 14l in the CD direction while transporting the exterior continuous sheet 14l in the MD direction. In this embodiment, the LSG adhesive portion 55 is positioned at a predetermined position f1. The adhesive is less likely to adhere to the sailor by being formed inside the CD direction (lateral direction). Thereby, the necessity to stop a production line for cleaning, maintenance, etc. of a sailor reduces, and the diaper 1 can be manufactured efficiently.

  And the area | region inside a horizontal direction is partially welded rather than the area | region joined by the LSG adhesion part 55 among the parts by which the exterior sheet | seat 14 was folded, The horizontal welding area | region 62 and the vertical welding area | region 66 are carried out. Is formed. The portions where the welding regions 62 and 66 are formed are portions that extend in the lateral direction along the circumference of the wearer's legs as the leg circumference extending portions 60 when the diaper 1 is worn. By forming the welded portions 62 and 66 to have a predetermined length in the horizontal direction and the vertical direction, the rigidity in the horizontal direction and the vertical direction of the leg-hole extending portion 60 formed by the exterior sheet 14 is increased. be able to.

  In the present embodiment, as shown in FIG. 7, the welding regions 62 and 66 include a plurality of first lateral welding regions 63 in the laterally outer portion of the exterior sheet 14 stacked in two layers in the thickness direction. Are formed side by side in the longitudinal direction, and a plurality of second lateral welding regions 64 are spaced in the longitudinal direction on the inner side in the lateral direction across the predetermined position f2 with respect to the first lateral welding region 63. Are formed side by side. That is, the first lateral weld region 63 and the second lateral weld region 64 are discontinuous in the lateral direction, and the first lateral weld region 63 and the second lateral weld region 64 are predetermined in the lateral direction. It is formed so as not to overlap with the position f2. Thereby, it is suppressed that the rigidity of the predetermined position f2 becomes high, and when the exterior sheet 14 is folded back at the predetermined position f2 in the extension part forming step (S105) to be described later, it can be firmly folded back. .

  Further, a first vertical welding region 67 is formed on the outer side in the horizontal direction from the first horizontal welding region 63, and a second vertical welding region 68 is formed on the inner side in the horizontal direction from the second horizontal welding region 64. Is done. In addition, both the horizontal welding area | region 62 and the vertical welding area | region 66 are formed so that it may not overlap with the edge 14e used as the edge of the exterior sheet | seat 14 in a horizontal direction (refer FIG. 6). Thereby, it is suppressed that rigidity becomes high in the edge part (14e) and the sheet member becomes hard, and even when the edge part is pressed against the wearer's skin when the diaper 1 is worn, the touch does not deteriorate. I am doing so.

  The horizontal welding region 62 (63, 64) is formed by arranging a plurality of dot-shaped welding portions 69 in the horizontal direction. Specifically, two rows of dots that are inclined with respect to the horizontal direction and in which three welds 69 are arranged are shifted in the horizontal direction and arranged in the vertical direction. Similarly, the vertical welding region 66 (67, 68) is also formed by two rows of dots in which a large number of dot-shaped welding portions 69 are arranged in the vertical direction, shifted in the vertical direction and arranged in the horizontal direction. Each welding portion 69 uses, for example, an embossing roller having a rotation axis along the CD direction, and uses one projection in a projection pattern provided on the outer peripheral surface of the embossing roller, and ultrasonic welding or the like. It is formed by the welding means. However, the welding part 69 may be formed by other welding means such as heat welding or laser irradiation.

  As described above, since the weld regions 62 and 66 are partially welded by the dot-shaped weld portion 69, the area of each weld portion 69 can be reduced. Accordingly, it is possible to repeatedly apply ultrasonic vibrations and the like to one point by the projection pattern during welding, and stable welding can be performed. However, the shape of the welding regions 62 and 66 is not limited to this. For example, the planar shape of one protrusion provided on the outer peripheral surface of the embossing roller is made the same shape as the welding regions 62 and 66, so that the entire region of the welding regions 62 and 66 is formed. May be welded. That is, linear welded regions 62 and 66 may be formed in which the entire region surrounded by the dotted line in FIG. 7 is welded.

  Further, the predetermined length in the horizontal direction of the horizontal welding region 62 is the horizontal length from one end to the other end of the horizontal welding region 62 and is represented by L62 in FIG. The shape of the lateral welding region 62 may be a shape (not shown) extending in parallel to the lateral direction (CD direction), as long as it has a predetermined length (L62) in the lateral direction. The shape inclined with respect to the horizontal direction like this embodiment may be sufficient.

  However, when the protrusion pattern of the embossing roller is arranged in parallel with the CD direction and the lateral welding region 62 is formed in parallel with the CD direction, the row of the protrusion pattern is arranged in accordance with the rotation of the embossing roller. At the moment of contact with the (exterior continuous sheet 14l), the lateral welding region 62 along the CD direction (lateral direction) is formed at the same timing. In this case, it is difficult to apply a uniform pressure to all the regions in the lateral direction, and the welding strength may be uneven in the lateral direction of the lateral welding region 62. Further, when a large pressure is applied to the rows of projection patterns at once, the projection patterns are likely to be worn. On the other hand, when the horizontal welding region 62 is inclined with respect to the horizontal direction (CD direction), the point where the pressure is applied in accordance with the rotation of the embossing roller sequentially moves, so that the horizontal welding region 62 is formed. In addition, local welding failure is unlikely to occur, and the welding strength is unlikely to be uneven. Moreover, since the location where a pressure is applied moves sequentially, the protrusion provided on the outer peripheral surface of the embossing roller is not easily worn, and the production can be performed efficiently.

  The predetermined length in the horizontal direction of the horizontal welding region 62 may be larger than 0 mm, but preferably has a certain length. For example, when the lateral width of the leg extension portion 60 is 40 mm, the lateral length of the lateral weld region 62 is preferably in the range of 7.5 mm to 27.5 mm, more preferably about 17.5 mm. It is good to be.

(S103)
Next, an elastic member arrangement step (S103) is performed in which the leg-hole elastic member 61 is arranged in a predetermined region of the exterior sheet 14 (exterior continuous sheet 141). FIG. 8 is a plan view and a cross-sectional view for explaining the elastic member arranging step.

  First, the end joint portion 52 of the leak-proof wall portion 50 is located on the skin side surface of the exterior sheet 14 having two layers and outside the lateral welding region 62 and the longitudinal welding region 66 in the lateral direction (CD direction). And the adhesive agent which forms the side junction part 53 is apply | coated. In the present embodiment, as shown in FIG. 8, the side joint portion 53 is formed on the outer side in the horizontal direction further than the first vertical welding region 67 formed on the outermost side in the horizontal direction. That is, the side joint portion 53 is formed so as not to overlap at least the welding regions 62 and 63 in the lateral direction. Moreover, the adhesive which forms the back sheet | seat junction part 44 for joining the back sheet | seat 13 by the next process (S104) in the skin side surface of the exterior sheet | seat 14, and the center of a horizontal direction (CD direction) is this process. May be applied (see FIG. 8). In addition, although the order in which each joining part 44,52,53 is formed is arbitrary, since these are formed in the position which does not interfere mutually on the skin side surface of the exterior sheet | seat 14, it is possible to apply an adhesive simultaneously. It is. By simultaneously applying the adhesive, it is possible to reduce the manufacturing cost while reducing the equipment space of the manufacturing line.

  After forming the joint portions 44, 52, and 53, the plurality of leg-hole elastic members 61 are vertically disposed on the skin side surface of the exterior sheet 14 and on the inner side in the lateral direction (CD direction) than the side joint portion 53. It joins in the state extended in the direction (MD direction). Note that the leg elastic member 61 is preliminarily coated with an adhesive in a region L61 shown in FIG. 8, and the stretchability in the vertical direction (MD direction) with respect to the exterior sheet 14 in the region L61 is provided. Is granted. Thereby, the stretchability along the vertical direction is expressed in the leg extension part 60 at least in the range of the region L61, and the fit property of the leg extension part 60 with respect to the wearer's leg is improved when the diaper 1 is worn. .

  In the present embodiment, four leg-hole elastic members 61a to 61d are provided from the inner side to the outer side in the horizontal direction. Of these, the leg-hole elastic members 61b and 61c are arranged so as to overlap the lateral welding region 64 (62) in the lateral direction. On the other hand, the leg-hole elastic member 61a located on the innermost side in the horizontal direction is disposed at a position between the absorbent body 12 and the horizontal welding region 62 in the horizontal direction. Further, the leg-hole elastic member 61d located on the outermost side in the lateral direction is disposed at a predetermined position f2 in the lateral direction. The predetermined position f2 is a position that becomes the outer end 60d in the lateral direction of the leg extension 60 when the diaper 1 is formed in a pants shape.

  In the manufacturing method of the present embodiment, the lateral weld region 62 is formed in S102, and then the leg-hole elastic member 61 is disposed in S103, whereby the lateral weld region 62 (64) is formed in the leg-hole extending portion 60. A vertical expansion / contraction force by the leg-hole elastic member 61 can be applied to the region where the leg is located. If the lateral weld region 62 is to be formed after the leg elastic member 61 is disposed, the leg elastic member 61 is cut by the pressure of an embossing roller or the like generated when the lateral weld region 62 is formed. Therefore, there is a possibility that the stretching force may not be expressed in the leg extension portion 60. On the other hand, according to the manufacturing method of the present embodiment, it is possible to form the lateral welding region 62 in a region overlapping with the leg-hole elastic member 61 without impairing the expansion / contraction force of the leg-hole elastic member 61. . The effect of overlapping the leg-hole elastic member 61 and the lateral welding region 62 in the leg-hole extension portion 60 will be described later.

(S104)
Next, an absorbent body transfer step (S104) is performed in which the absorbent body 12 (the absorbent body 12 in a state where the top sheet 11 is wound) is attached to the skin side of the exterior sheet 14 (the exterior continuous sheet 141). FIG. 9 is a plan view and a cross-sectional view for explaining the absorber transfer process.

  First, the back sheet 13 is joined to the skin side surface of the exterior sheet 14. The back sheet 13 is disposed so as to overlap the leg-hole elastic members 61a to 61c in the lateral direction (CD direction). That is, the backsheet 13 has at least a region between the leg elastic member 61c arranged on one side in the lateral direction and the leg elastic member 61c arranged on the other side in the thickness direction. It arrange | positions so that it may cover from the skin side, and it joins to the skin side surface of the exterior sheet | seat 14 with the adhesive agent apply | coated to the surface of the back sheet | seat joining part 44 and the leg periphery elastic member 61.

  In addition, on the structure of the absorptive main body 10, it is also possible to arrange | position the back seat | sheet 13 on the non-skin side rather than the leg periphery elastic member 61. FIG. However, in this case, a part of the leg-hole elastic member 61 may be exposed to the skin side, and the adhesive applied to the surface of the leg-hole elastic member 61 adheres to the wearer's body when the diaper 1 is worn. Doing so may cause discomfort to the wearer. On the other hand, in the diaper 1 of this embodiment, the leg-hole elastic member 61 is exposed to the skin side by arrange | positioning the back sheet 13 so that the skin side of the leg-hole elastic members 61a-61c may be covered in S104. This prevents the adhesive from adhering to the wearer's body when the diaper 1 is worn.

  Then, the absorbent body 12 is joined (transferred) to the skin side surface of the back sheet 13 through the absorbent body joint portion 43 formed by the adhesive applied to the skin side surface of the back sheet 13.

(S105)
Subsequently, the leg periphery extension part formation process (S105) which forms the leg periphery extension part 60 by folding back both ends of the horizontal direction of the exterior sheet 14 (exterior continuous sheet 141) from the outside to the inside again is performed. FIGS. 10A and 10B are a plan view and a cross-sectional view for explaining the leg extension portion forming step. The cross-sectional view of FIG. 10 corresponds to FIG.

  In the extension portion forming step (S105), both end portions of the exterior sheet 14 are folded back from the outer side to the inner side with the predetermined position f2 where the leg-hole elastic member 61d is disposed as the folding position. The opposing surfaces of the exterior sheet 14 folded in the thickness direction are joined to each other by the end joint portion 52 and the side joint portion 53. Thereby, the leg periphery extension part 60 extended in the horizontal direction outer side is formed. As described above, since the horizontal welding region 62 and the vertical welding region 66 are not formed at the predetermined position f2, the rigidity of the outer sheet 14 does not become too high at the predetermined position f2, and the outer sheet 14 is firmly bent. Is possible. Therefore, the leg periphery extending part 60 can be formed in a clean flat shape.

  Then, the exterior sheet 14 is folded at the predetermined position f2, so that the first lateral welding region 63 and the first vertical welding region 67, the second lateral welding region 64 and the second vertical welding region 68 are obtained. The legs are overlapped in the thickness direction, and the leg-hole elastic members 61b and 61c are sandwiched therebetween. That is, the leg extension part 60 in which at least a part of the plurality of leg circumference elastic members 61 overlaps with the lateral welding region 62 is formed.

  Conventionally, in a diaper (see FIG. 1) in which the leg extension portion extends greatly in the lateral direction like the diaper 1, the leg extension portion contracts in the horizontal direction and turns when worn. Tended to get worse. On the other hand, in the diaper 1 manufactured by the manufacturing method of the present embodiment, by providing a plurality of the lateral welding regions 62, the rigidity in the lateral direction of the leg extension part 60 is increased, and the leg extension part 60 is increased. However, it becomes easy to keep the surface shape. That is, even when the contraction force by the leg elastic member 61 is applied, the contraction or turning of the leg extension part 60 in the lateral direction is suppressed, and the leg extension part 60 is laterally controlled. A state having a width (a wide state) is easily maintained. Further, a force that contracts in the vertical direction while maintaining the surface shape of the leg-hole extending portion 60 acts, whereby a large number of ridges along the lateral direction are formed on the surface of the leg-hole extending portion 60. Due to the unevenness, the feel of the leg extension portion 60 can be improved. Thereby, at the time of wearing of the diaper 1, the leakage of excrement from the leg circumference is suppressed by making the leg circumference extension portion 60 closely contact with the circumference of the wearer's leg by a wide surface. Can do.

  In the diaper 1, as shown in the cross-sectional view of FIG. 10, the leg-hole elastic members 61 a to 61 c and the end joints in a state where the exterior sheet 14 is folded at a predetermined position f <b> 2 and overlapped in the thickness direction. Between the thickness direction of 52 and the side junction part 53, it becomes the structure by which the back seat | sheet 13 was interposed. That is, in the absorbent main body 10, the leg-hole elastic members 61a to 61c, the end joint portion 52, and the side joint portion 53 are not in contact with each other in the thickness direction. Assuming that the end joint portion 52 and the side joint portion 53 and the leg-hole elastic member 61 overlap with each other in the thickness direction, a region L61 in which an adhesive is applied to the surface of the leg-hole elastic member 61. The elastic force due to the leg elastic member 61 also acts on the other parts, causing the longitudinal end portions of the absorbent main body 10 and the front waistline portion 20 and the back waistline portion 30 to contract in the longitudinal direction. There is a fear. On the other hand, in the present embodiment, the back sheet 13 is arranged on the skin side of the leg-hole elastic member 61, thereby suppressing the contact between the end joint portion 52 and the side joint portion 53 and the leg-hole elastic member 61. Thus, the contraction force by the leg elastic member 61 is suppressed from acting on the front waistline portion 20 and the back waistline portion 30 and the like.

  In addition, in the state where the leg extension portion 60 is formed, the leg circumference elastic member 61a located on the innermost side in the horizontal direction among the four leg circumference elastic members 61a to 61d is welded to the absorber 12 in the horizontal direction. It is arranged at a position between the regions 62 and 66. Therefore, due to the contraction of the leg elastic member 61a, a portion of the leg extension 60 that is laterally outer than the leg elastic member 61a becomes a base point that is lifted to the skin side of the wearer when the diaper 1 is worn. The standing height of the leg extension part 60 is ensured. Thereby, it becomes easy to make the leg periphery extension part 60 closely_contact | adhere to a wearer's leg periphery.

  On the other hand, among the four leg-hole elastic members 61 a to 61 d, the leg-hole elastic member 61 d positioned on the outermost side in the horizontal direction is disposed at the position of the horizontal outer end 60 d of the leg-hole extending portion 60. Therefore, due to the contraction of the leg-hole elastic member 61d, the leg-hole extending portion 60 can be firmly attached to the wearer up to the position of the lateral outer end 60d. In particular, in the diaper 1, the lateral weld region 62 does not reach the lateral outer end 60 d of the leg extension 60, and therefore it is difficult for the leg extension 60 to maintain the surface shape in the region of the outer end 60 d. There is a fear. On the other hand, it can suppress that the fitting property of the leg periphery extension part 60 deteriorates by making it closely_contact | adhere to a wearer's leg with the contractive force of the leg periphery elastic member 61d.

  In addition, when the leg extension portion 60 is formed in the extension portion forming step (S <b> 105), the exterior sheet 14 between the pair of end joint portions 52 in the vertical direction causes the side joint portion 53 to contract due to the contraction of the LSG elastic member 51. The leak-proof wall part 50 is formed by standing on the wearer's skin side from the base point. Since the side joint part 53 (that is, the standing base point of the leak-proof wall part 50) is formed so as not to overlap with the welding regions 62 and 66 in the lateral direction (S103), the side joint part 53 is formed in the exterior sheet 14. The region that is formed does not have high rigidity, and the exterior sheet 14 is easily bent naturally with the side joint portion 53 as a base point, and the leak-proof wall portion 50 is easily raised.

  Moreover, in the diaper 1, the leak-proof wall part 50 and the leg periphery extension part 60 can be integrally formed by folding the exterior sheet | seat 14. FIG. That is, in the diaper 1, the joint of the sheet member is not formed between the absorbent main body 10, the leak-proof wall portion 50, and the leg-hole extending portion 60. Therefore, it is possible to suppress excrement from leaking from the seam of the seat in the vicinity of the wearer's leg.

<Modification>
FIG. 11A to FIG. 11C are diagrams for explaining modifications of the lateral welding region 62. 11A to 11C are diagrams showing a state in which the first lateral welding region 63 and the second lateral welding region 64 are formed on the exterior sheet 14 in the welding region forming step (S102), and the diagram on the right side. These are the figures which showed the positional relationship of the 1st horizontal welding area | region 63 and the 2nd horizontal welding area | region 64 in the leg periphery extension part 60 after a leg periphery extension part formation process (S105).

  In the above embodiment, as shown in FIG. 6, the first lateral welding region 63 and the second lateral welding region 64 are formed symmetrically with respect to the folding position f2 of the exterior sheet 14, that is, the inclination direction is Symmetrical and vertical position matches. Therefore, the first lateral welding region 63 and the second lateral welding region 64 are arranged so as to overlap in the thickness direction. However, the present invention is not limited to this, and part or all of the first lateral welding region 63 and the second lateral welding region 64 may not overlap in a plan view in the thickness direction. That is, the position on the plane of the first lateral welding region 63 (the position in the lateral direction and the longitudinal direction) and the position on the plane of the second lateral welding region 64 may be shifted.

  For example, as shown on the left side of FIG. 11A, the first lateral welding region 63 and the second lateral welding region 64 are formed by making the inclination direction symmetrical with respect to the folding position f2 and shifting the vertical position. Also good. In this case, as shown on the right side of FIG. 11A, the first lateral weld region 63 and the second lateral weld region 64 that are inclined in the same direction are alternately arranged in the longitudinal direction in a plan view of the leg extension 60. Arranged at.

  Further, for example, as shown on the left side of FIG. 11B, the first lateral weld region 63 and the second lateral weld region 64 are formed with the same inclination direction with respect to the folding position f2 and with the vertical position shifted. May be. In this case, as shown on the right side of FIG. 11B, the first lateral welding region 63 and the second lateral welding region 64 inclined in the opposite direction are alternately arranged in the longitudinal direction in the plan view of the leg extension 60. Arranged at.

  Further, for example, as shown on the left side of FIG. 11C, the first horizontal welding region 63 and the second horizontal welding region 64 have the same inclination direction and the same vertical position with respect to the folding position f2. It may be formed. In this case, as shown on the right side of FIG. 11C, the first lateral weld region 63 and the second lateral weld region 64 that are inclined in the opposite direction are arranged so as to intersect each other in plan view of the leg extension 60. .

  As shown in FIGS. 11A and 11B, the first lateral welding region 63 and the second lateral welding region 64 may be completely displaced, and as shown in FIG. 11C, the first lateral welding region 63 And a part of the second lateral welding region 64 may overlap and the remaining part may be displaced. As described above, in the plan view in the thickness direction, the first lateral weld region 63 and the second lateral weld region 64 are deviated, so that the lateral weld region 62 is formed in a wider planar range of the leg extension 60. Therefore, the rigidity of the leg extension portion 60 in the lateral direction is increased. Therefore, the wide state of the leg extension portion 60 is easily maintained, and leakage from the leg extension is suppressed.

  As shown in FIG. 11A and FIG. 11B, when the first lateral welding region 63 and the second lateral welding region 64 are completely deviated, the pressure is sequentially increased during the welding, for example, with the rotation of the embossing roller. Since the horizontal welding region 62 is formed while being applied, the welding is stabilized. Although not shown, a part of the plurality of first lateral welding regions 63 overlaps with the second lateral welding region 64, and the remaining first lateral welding region 63 is connected to the second lateral welding region 64. The form which does not overlap may be sufficient. Moreover, the planar shape and magnitude | size of the 1st horizontal welding area | region 63 and the 2nd horizontal welding area | region 64 may differ, and the plane of 1st horizontal welding area | regions 63 or the 2nd horizontal welding area | region 64 mutually. The shape and size may be different. Further, the number of the first lateral welding regions 63 and the number of the second lateral welding regions 64 may be different. For example, by increasing the number of the second lateral welding regions 64 on the non-skin side as compared with the number of the first lateral welding regions 63 on the skin side, the lateral rigidity of the leg extension portion 60 is increased. You can improve the skin feel while increasing.

  As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof.

  In the above-described embodiment, the horizontal welding region 62 and the vertical welding region 66 are formed from one end side to the other end side of the absorbent main body 10 in the vertical direction, but this is not restrictive. For example, the horizontal welding region 62 and the vertical welding region 66 may not be formed at both longitudinal ends of the absorbent main body 10. This region (both ends in the vertical direction) is a region that overlaps the front waistline portion 20 and the back waistline portion 30 in the vertical direction, and when the diaper 1 is worn, contact with the leg of the wearer as the leg periphery opening LH. Without contact with the wearer's abdomen and back. Therefore, it is not always necessary to ensure the rigidity of the leg extension 60 in the region. On the contrary, if the horizontal welding area | region 62 and the vertical welding area | region 66 are not formed in the said area | region, when wearing the diaper 1, the wearer's abdomen and back can be made soft.

1 diapers (absorbent articles),
10 Absorbent body,
11 Top sheet, 12 Absorber, 121 Absorbent core, 122 Core wrap sheet,
13 Backsheet,
14 exterior sheet, 14e end, 14l exterior continuous sheet,
20 Front waistline,
21 sheets, 21 sheets, 22 waist elastic members,
30 Rear waistline,
31 sheet, 31 sheet, 32 waist elastic member,
43 absorber joint, 44 backsheet joint,
50 Leak-proof wall,
51 elastic members (LSG elastic members), 52 end joints, 53 side joints,
55 LSG adhesion part,
60 leg extension part, outer end 60d,
61 elastic members (leg elastic members), 61a to 61d leg elastic members,
62 lateral welding region (welding region), 63 first lateral welding region, 64 second lateral welding region,
66 vertical welding region, 67 first vertical welding region, 68 second vertical welding region,
69 welds,
LH leg opening, BH waist opening,
f1 predetermined position, f2 predetermined position

Claims (10)

Having a longitudinal direction, a transverse direction and a thickness direction;
A manufacturing method of a pants-type absorbent article comprising: an absorbent body whose longitudinal direction is along the longitudinal direction; and an exterior sheet stacked on the non-skin side of the absorbent body,
In the lateral direction, both end portions of the unfolded exterior sheet are folded back from the outside to the inside, and the exterior sheet has a predetermined length in the lateral direction by welding a portion folded in the thickness direction. A welding region forming step for forming a welding region;
An elastic member arranging step of arranging an elastic member that expands and contracts in the vertical direction in a predetermined region of the exterior sheet;
By folding back both ends of the exterior sheet from the outside to the inside in the lateral direction, the elastic member extends at both sides in the lateral direction of the absorber, and at least a part of the elastic member in the lateral direction is in contact with the welding region. A leg extension part forming step for forming overlapping leg extension parts;
A method for producing a pant-type absorbent article, comprising: It is a manufacturing method of the underpants type absorbent article according to claim 1,
In the elastic member arranging step, the elastic member is arranged so as to overlap with at least a part of the welding region in the lateral direction. It is a manufacturing method of the underpants type absorbent article according to claim 1 or 2,
The welding region has a first welding region and a second welding region,
In the lateral direction, the first welded region and the second welded region are discontinuous. It is a manufacturing method of the underpants type absorbent article according to claim 3,
In the leg extension portion forming step, the exterior sheet is folded at a predetermined position between the first weld region and the second weld region in the lateral direction. A method for producing a functional article. It is a manufacturing method of the underpants type absorbent article according to any one of claims 1 to 4,
The method for manufacturing a pants-type absorbent article, wherein the welding region is formed to be inclined at a predetermined angle with respect to the lateral direction. It is a manufacturing method of the underpants type absorptive article according to any one of claims 1 to 5,
The method for manufacturing a pants-type absorbent article, wherein the weld region is formed by arranging a plurality of dots in the horizontal direction. It is a manufacturing method of the underpants type absorptive article in any one of Claims 1-6,
A pair of leakage barriers standing on the skin side of the wearer is formed on both sides of the absorbent body in the lateral direction,
The method for manufacturing a pants-type absorbent article, wherein the welding region is formed in a position that does not overlap with a position of a base point where the leak-proof wall portion stands in the lateral direction. It is a manufacturing method of the underpants type absorptive article in any one of Claims 1-7,
In the leg extension portion, a plurality of the elastic members are provided side by side in the lateral direction,
Of the plurality of elastic members, the elastic member provided on the innermost side in the lateral direction is disposed between the absorbent body and the welding region in the lateral direction, and is a pant-type absorbent Article manufacturing method. It is a manufacturing method of the underpants type absorbent article in any one of Claims 1-8,
In the leg extension portion, a plurality of the elastic members are provided side by side in the lateral direction,
Of the plurality of elastic members, the elastic member provided on the outermost side in the lateral direction is disposed at an outer end of the leg-hole extending portion in the lateral direction. Manufacturing method. It is a manufacturing method of the underpants type absorptive article according to any one of claims 1 to 9,
A method for producing a pant-type absorbent article, characterized in that a liquid-impermeable back sheet is provided on the skin side of the elastic member disposed so as to overlap the weld region in the lateral direction.

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