JP6752085B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

A disposable diaper is an example of an absorbent article. Patent Document 1 discloses a disposable diaper including an absorbent body and a waist belt. The waist belt of this diaper has an inner seat portion, an outer seat portion, and a cushion-forming seat portion between them. Further, the waist elastic material is fixed in an extended state between the outer seat portion and the cushion forming seat portion. Then, the cushion-forming seat portion and the inner seat portion are intermittently joined in the direction along the waist circumference. Therefore, a space is created in the non-joint portion between the cushion-forming seat portion and the inner seat portion, and the irritation given to the wearer's skin can be reduced.

Japanese Unexamined Patent Publication No. 2013-70711

Further, in the above-mentioned diaper, in order to prevent lateral leakage of excrement, second three-dimensional gathers (extending portions) extending laterally to both sides of the absorber are provided, and the second three-dimensional gathers are provided. It is configured to be in close contact with the wearer's legs. In the second three-dimensional gather, three elastic materials are arranged in the horizontal direction and have a width in the horizontal direction. However, the second three-dimensional gather is easily affected by the waist elastic material, and may shrink or turn over in the lateral direction. Then, the second three-dimensional gather cannot be brought into close contact with the wearer's legs on the surface, and the effect of preventing lateral leakage is reduced. Further, the second three-dimensional gather is formed by joining the side sheet and the cover sheet. Therefore, excrement easily oozes from the seams of both sheets.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article in which leakage from the leg circumference is suppressed.

The main invention for achieving the above object is
It has a vertical direction and a horizontal direction,
An absorbent body having an absorber and having a longitudinal direction along the vertical direction,
An absorbent article having a pair of girth portions located on one end side and the other end side in the longitudinal direction of the absorbent body and having elastic members that expand and contract in the lateral direction.
The absorbent body includes a pair of extending portions on both outer sides of the absorbent body in the lateral direction and in which elastic members that expand and contract in the vertical direction are arranged.
The extending portion is formed by a sheet extending outward in the lateral direction from a position on the non-skin side surface side of the absorber and continuing in the lateral direction.
A welding region having a predetermined length in the lateral direction is arranged at a portion where the extending portion forms an opening around the leg .
The welding region has a first welding region and a second welding region.
In the portion where the extending portion forms the leg circumference opening, the portion of the continuous sheet on which the first welding region is arranged and the portion of the continuous sheet on which the second welding region is arranged. Is an absorbent article characterized in that it is folded in the thickness direction of the extension portion .
Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article in which leakage from the leg circumference is suppressed.

It is a schematic perspective view of the pants type disposable diaper 1. FIG. 5 is a schematic plan view of the unfolded and stretched diaper 1 as viewed from the side surface of the skin. It is a schematic sectional drawing of diaper 1. 4A and 4B are diagrams illustrating a method of forming the absorbent body 10. It is explanatory drawing of the adhesive region 40 of the absorbent body 10 and a pair of waist circumferences 20, 30. It is a figure explaining the feature of the leg circumference extension part 60. It is an enlarged view of the transverse welding region 62 and the longitudinal welding region 66. It is a figure which shows the state which the leg around extension part 60 comes into close contact with a wearer. 9A to 9C are views for explaining a modified example of the transverse welding region 62.

The description of the present specification and the accompanying drawings will clarify at least the following matters.

It has a vertical direction and a horizontal direction, includes an absorber, and is located on an absorbent main body whose longitudinal direction is along the vertical direction and on one end side and the other end side of the absorbent main body in the longitudinal direction, respectively. An absorbent article comprising a pair of girths with elastic members that expand and contract in the lateral direction, wherein the absorbent body extends laterally to both sides of the absorber and in the longitudinal direction. The extension is provided by a pair of extension portions on which elastic members that expand and contract are arranged, extends outward in the lateral direction from a position on the non-skin side surface side of the absorber, and is extended by a sheet that is continuous in the lateral direction. An absorbent article characterized in that a welded region having a predetermined length is arranged in the lateral direction at a portion where a portion is formed and the extended portion forms an opening around a leg.

According to such an absorbent article, the lateral rigidity of the portion where the extending portion forms the leg circumference opening is increased, and the state in which the portion has a lateral width is easily maintained, and the wearer Can be closely attached to the legs. Therefore, leakage from around the legs is suppressed. In addition, the seams of the sheets are not exposed on the extending portion and the non-skin side surfaces around the extending portion, and the exudation of excrement from the seams of the sheets is suppressed.

In such an absorbent article, the welding region has a first welding region and a second welding region, and the first welding is performed at a portion where the extending portion forms the leg circumference opening. The continuous sheet portion on which the region is arranged and the continuous sheet portion on which the second welding region is arranged are folded in the thickness direction of the extension portion. Absorbent article.

According to such an absorbent article, the lateral rigidity of the portion where the extending portion forms the leg circumference opening is further increased, and the state in which the portion has a lateral width is easily maintained, and the leg circumference is easily maintained. Leakage from is more reliably suppressed.

An absorbent article, wherein at least a part of the first welded region and the second welded region do not overlap in a plan view in the thickness direction.

According to such an absorbent article, the welded region exists in a wider plane range of the portion where the extending portion forms the leg circumference opening, and the rigidity in the lateral direction is further increased, so that the leg circumference Leakage is more reliably suppressed.

An absorbent article, wherein the welded region is arranged inside the laterally outer end of the extending portion.

According to such an absorbent article, the laterally outer end of the portion where the extending portion forms the leg circumference opening is flexible, so that the skin feels good. Further, since the force of pinching the wearer's leg is absorbed, it is easy to maintain the state where the portion has a width in the lateral direction, and leakage from the leg circumference is suppressed.

In such an absorbent article, the continuous sheet is folded at a portion where the extending portion forms the leg circumference opening, and the continuous sheet is folded between the absorbent body and the continuous sheet, and folded. A liquid-impermeable sheet is arranged between the continuous sheets that are stacked, and the liquid-impermeable sheet is arranged inside the lateral outer end of the extending portion. An absorbent article characterized by that.

According to such an absorbent article, the laterally outer end of the portion where the extending portion forms the leg circumference opening is flexible, so that the skin feels good. Further, since the force of pinching the wearer's leg is absorbed, it is easy to maintain the state where the portion has a width in the lateral direction, and leakage from the leg circumference is suppressed.

An absorbent article, characterized in that the elastic member arranged in the extending portion and expanding and contracting in the vertical direction intersects with the welding region.

According to such an absorbent article, among the portions where the extending portion forms the leg circumference opening, the portion where the welded region is arranged is integrally lifted toward the wearer side by the contraction of the elastic member and worn. It can be in close contact with the person's legs.

The absorbent article is characterized in that the elastic member that expands and contracts in the vertical direction arranged in the extending portion is arranged at a position between the absorbent body and the welding region in the horizontal direction. Absorbent article.

According to such an absorbent article, the portion where the extension portion forms the leg circumference opening is lifted toward the wearer side by the contraction of the elastic member, and the standing height is secured, so that the wearer's leg circumference is secured. Can be in close contact with.

The absorbent article is characterized in that the elastic member arranged in the extending portion and expanding and contracting in the vertical direction is arranged at the position of the outer end in the lateral direction of the extending portion. Absorbent article.

According to such an absorbent article, the portion where the extending portion forms the leg circumference opening can be brought into close contact with the wearer up to the position of the outer end in the lateral direction.

In such an absorbent article, the absorbent body is provided with a pair of leak-proof wall portions that can stand up on the wearer side on both side portions in the lateral direction of the absorbent body, and the leak-proof body is provided by the continuous sheet. An absorbent article characterized in that a wall portion is formed.

According to such an absorbent article, there is no seam of the sheet at the boundary between the extending portion and the leak-proof wall portion, and leakage from the leg circumference is further suppressed.

Such an absorbent article, characterized in that the pair of extending portions are formed by the common continuous sheet.

According to such an absorbent article, the seam of the sheet is not exposed on the non-skin side surface of the absorbent body, and leakage from the seam of the sheet is suppressed. In addition, since the pair of extension portions are pulled up together when worn, the pair of extension portions can be brought into close contact with the wearer's legs in a well-balanced manner.

=== Embodiment ===
The following embodiments will be described by taking "pants-type disposable diapers" as an example of the absorbent article according to the present invention. The pants-type disposable diaper of the present embodiment can be used for both infants and adults.

=== Basic configuration of pants-type disposable diapers ===
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter referred to as “diaper”). FIG. 2 is a schematic plan view of the unfolded and stretched diaper 1 as viewed from the side surface of the skin. FIG. 3 is a schematic cross-sectional view of the diaper 1. 4A and 4B are diagrams illustrating a method of forming the absorbent body 10. FIG. 5 is an explanatory view of the adhesive region 40 of the absorbent main body 10 and the pair of waist circumference portions 20 and 30. 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 wrinkles of the diaper 1 become invisible. Specifically, it shows a state in which the dimensions of each member (for example, the exterior sheet 14 described later) constituting the diaper 1 are extended until the dimensions match or are close to the dimensions of the member alone.

As shown in FIG. 1, the pants-type diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction, and the diaper 1 is formed with a waist circumference opening BH and a pair of leg circumference openings LH. In the vertical direction, the waist opening BH side is the upper side, and the wearer's inseam side is the lower side. In the anterior-posterior direction, the ventral side of the wearer is the front side, and the dorsal side of the wearer is the rear side. Further, the diaper 1 has a thickness direction as shown in FIG. 3, and the side in the thickness direction that comes into contact with the wearer is the skin side, and the opposite side is 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 waist circumferences 20 and 30. The absorbent body 10 has a substantially rectangular shape in a plan view, and its longitudinal direction is along the vertical direction. The waist circumference portions 20 and 30 have a substantially rectangular shape in a plan view, and the longitudinal direction thereof is along the lateral direction. Of the pair of waist circumferences 20 and 30, the one that covers the ventral side of the wearer is also referred to as the front waist circumference portion 20, and the one that covers the back side portion of the wearer is also referred to as the rear waist circumference portion 30.

As shown in the unfolded state of FIG. 2, the lateral central portion of the front waist circumference portion 20 is located on one end side of the absorbent main body 10 in the longitudinal direction, and is located on the other end side of the absorbent main body 10 in the longitudinal direction. , The lateral central portion of the rear waist circumference portion 30 is located. Then, the non-skin side surface of the absorbent main body 10 and the skin side surface of the pair of waist circumference portions 20 and 30 are joined in the adhesive region 40 shown in FIG. 5 by an adhesive or the like. From the unfolded state of FIG. 2, the absorbent main body 10 is folded in half at the substantially central portion in the longitudinal direction so that the front waist circumference portion 20 and the rear waist circumference portion 30 overlap, and the front waist circumference portion 20 and the lateral side portions 20a. The diaper 1 becomes a pants type by joining the lateral side portions 30a of the rear waist circumference portion 30.

The front waist circumference portion 20 and the rear waist circumference portion 30 each have 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. Be prepared. In the following description, the elastic members 22 and 32 are also referred to as waist elastic members 22 and 32. The plurality of elastic members around the waist 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 being extended in the horizontal direction. There is. Therefore, the front waist circumference portion 20 and the rear waist circumference portion 30 can be expanded and contracted in the lateral direction to fit the wearer's waist circumference.

As shown in FIG. 3, the absorbent main body 10 includes a top sheet 11, an absorbent body 12, a back sheet 13, and an exterior sheet 14 in this order from the skin side in the thickness direction. The top sheet 11 may be a liquid permeable sheet, and examples thereof include hydrophilic air-through non-woven fabrics and spunbonded non-woven fabrics. 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 have a size that covers the entire absorber 12. Further, in the present embodiment, both side portions of the top sheet 11 in the lateral direction are folded into the non-skin side surface side of the absorber 12. The exterior sheet 14 may be a liquid-permeable sheet or a liquid-impermeable sheet. However, in the present embodiment, since the leak-proof wall portion 50 is formed by the exterior sheet 14, a hydrophobic SMS non-woven fabric or the like can be exemplified as the exterior sheet 14.

The absorber 12 has a rectangular shape in a plan view, and includes an absorbent core 121 that absorbs a 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, and in the present embodiment, the absorbent core 121 has a substantially hourglass shape in which the central portion in the longitudinal direction is constricted. Examples of the liquid-absorbent material include those in which a liquid-absorbent fiber such as pulp fiber contains a highly absorbent polymer (so-called SAP) or the like. As the core wrap sheet 122, a liquid permeable sheet such as tissue paper or non-woven fabric can be exemplified. The core wrap sheet 122 may not be provided.

Further, the absorbent main body 10 includes a pair of leak-proof wall portions 50 and a pair of leg-circling extending portions 60 (a pair of extending portions). Details will be described later, but in the present embodiment, as shown in FIGS. 3 and 4, both side portions of one exterior sheet 14 in the lateral direction are folded so that the pair of leak-proof wall portions 50 and the pair of leg circumferences are folded. The extending portion 60 is integrally formed.

The pair of leak-proof wall portions 50 are provided on both side portions in the lateral direction of the absorber 12 along the longitudinal direction of the absorbent body 10. Specifically, it is provided from a position where it overlaps with the absorber 12 in the lateral direction to a position where it extends. Each leak-proof wall portion 50 is provided with an elastic member 51 that expands and contracts in the longitudinal direction (vertical direction of the diaper 1), and a pair of exterior sheets 14 forming the leak-proof wall portion 50 are joined to the top sheet 11 and the back sheet 13. It includes an end joint 52 and a side joint 53. The pair of end joints 52 are arranged at both ends of the absorbent body 10 in the longitudinal direction, and the side joints 53 extend from one end to the other end of the absorbent body 10 in the longitudinal direction and are more than the end joints 52. It is located on the outside in the horizontal direction. Therefore, in the leak-proof wall portion 50, due to the contraction of the elastic member 51, the portion of the exterior sheet 14 between the pair of end joint portions 52 is moved to the wearer side (skin side in the thickness direction) with the side joint portion 53 as the base point. You can stand up. Therefore, the excrement that has flowed sideways is blocked by the leak-proof wall portion 50. However, the diaper 1 does not have to have the leak-proof wall portion 50.

The pair of leg circumference extending portions 60 are portions extending laterally to both sides of the absorber 12. Specifically, the portion from the lateral outer end of the absorber 12 to the lateral outer end of the absorbent body 10 is referred to as the leg circumference extending portion 60. Further, as shown in FIG. 5, each leg circumference extending portion 60 has a “leg circumference opening forming portion 60a” forming the leg circumference opening LH, and each of the front waist circumference portion 20 and the rear waist circumference portion 30 in the vertical direction. In other words, it has a pair of "overlapping portions 60b", in other words, a pair of "overlapping portions 60b" overlapping each of the front waist circumference portion 20 and the rear waist circumference portion 30 in the thickness direction. In addition, each leg circumference extending portion 60 expands and contracts in the longitudinal direction (vertical direction of the diaper 1), and four elastic members 61 (hereinafter, leg circumference elastic member 61) arranged at intervals in the lateral direction. Also called). Therefore, the leg circumference opening forming portion 60a in the leg circumference extending portion 60 fits the wearer's leg circumference.

Further, a plurality of "transverse welding regions 62 (welding regions in the present invention)" extending in the lateral direction and inclined in the lateral direction are arranged in each leg circumference extending portion 60. As shown in FIG. 3, the plurality of transverse welding regions 62 include a plurality of first transverse welding regions 63 located on the skin side in the thickness direction and a plurality of second transverse welding regions 63 located on the non-skin side in the thickness direction. It has a transverse welding region 64. As shown in FIG. 5, the plurality of first transverse welding regions 63 and the plurality of second transverse welding regions 64 are both spaced apart in the longitudinal direction over the entire longitudinal direction of the leg circumference extending portion 60, as shown in FIG. They are arranged side by side.

Further, in each leg circumference extending portion 60, a "longitudinal welding region 66" extending in the vertical direction (longitudinal direction) is arranged inside the lateral welding region 62 in the lateral direction. The vertical welding region 66 is also arranged over the entire length of the leg extension portion 66 in the longitudinal direction, and is located on the skin side in the thickness direction and the non-skin side in the thickness direction. It has a second longitudinal welding region 68 to be formed.

In addition, as the elastic member (22, 32, 51, 61) provided in the front waist circumference portion 20, the rear waist circumference portion 30, the leakage-proof wall portion 50, and the leg circumference extension portion 60, a thread-like elastic member such as rubber thread is exemplified. However, it is not limited to this. Instead of the rubber thread, a single or a plurality of sheet-shaped elastic members such as a stretchable film and a stretchable non-woven fabric may be arranged. In addition, the drawings show only the parts of the elastic member that exhibit elasticity (so-called effective length parts). Therefore, there may be a portion of the elastic member that does not exhibit elasticity outside the elastic member shown in the longitudinal direction. Further, the arrangement and number of elastic members are not limited to those shown in the figure.

=== Method of forming the absorbent body 10 ===
Next, a method of forming the pair of leak-proof wall portions 50 and the pair of leg-circling extending portions 60 by one exterior sheet 14 will be briefly described with reference to FIG.
First, as shown on the left side of FIGS. 4A and 4B, elastic members 51 for the leak-proof wall portion 50 are fixed to both sides of the exterior sheet 14 in the lateral direction in a state of being extended in the longitudinal direction. After that, the lateral position where the elastic member 51 for the leak-proof wall portion 50 is fixed is set as the folding position f1, and both lateral portions of the exterior sheet 14 are folded back toward the skin side in the thickness direction (inside in the lateral direction). Is done.

Next, as shown on the right side of FIGS. 4A and 4B, the lateral welding region 62 and the vertical welding region 66 are formed by partially welding the parts of the exterior sheet 14 which is folded back into two layers. Will be done. Specifically, among the two-layered exterior sheet 14, a plurality of first lateral welding regions 63 are formed side by side at intervals in the longitudinal direction in the outer portion in the lateral direction, and are formed in the lateral direction. A plurality of second transverse welding regions 64 are formed side by side at intervals in the longitudinal direction in the inner portion of the above. Further, the first longitudinal welding region 67 is formed on the outer side in the lateral direction from the first transverse welding region 63, and the second longitudinal welding region 68 is formed on the inner side in the transverse direction from the second transverse welding region 64. Will be done. The welding regions 62 and 66 may be formed by a well-known welding method, and examples thereof include heat welding, ultrasonic welding, and laser irradiation welding.

Next, the end joint portion 52 and the side joint portion 53 of the leak-proof wall portion 50 are provided on the skin side surface of the portion of the exterior sheet 14 having two layers and on the outer portion in the lateral direction from the lateral welding region 62. An adhesive for forming is applied. Then, the four elastic members around the legs 61 are fixed to the skin side surface of the exterior sheet 14 in a laterally inner portion from the side joint portion 53 in a state of being extended in the longitudinal direction. After that, the back sheet 13 and the absorber 12 around which the top sheet 11 is wound are overlapped and joined to the central portion in the lateral direction of the exterior sheet 14.

Finally, at the folding position f2 between the first transverse welding region 63 and the second transverse welding region 64, both lateral portions of the exterior sheet 14 are folded back toward the skin side in the thickness direction of the top sheet 11. As a result, the absorbent body 10 shown in FIG. 3 is formed. That is, both sides of the exterior sheet 14 in the lateral direction are each folded into four layers. Further, the first transverse welding region 63 and the second transverse welding region 64 are overlapped in the thickness direction, and the first longitudinal welding region 67 and the second longitudinal welding region 68 are overlapped in the thickness direction. become. In the following description, the parts of the four-layer exterior sheet 14 are also referred to as a first sheet portion 14a, a second sheet portion 14b, a third sheet portion 14c, and a fourth sheet portion 14d in order from the skin side in the thickness direction. The leak-proof wall portion 50 is formed by the first sheet portion 14a and the second sheet portion 14b, and the leg circumference extending portion 60 is formed by the first sheet portion 14a to the fourth sheet portion 14d.

=== Leg circumference extension 60 ===
FIG. 6 is a diagram for explaining the features of the leg circumference extending portion 60. FIG. 7 is an enlarged view of the transverse welding region 62 and the longitudinal welding region 66. FIG. 8 is a diagram showing a state in which the leg circumference extending portion 60 is in close contact with the wearer. In FIG. 8, the leak-proof wall portion 50 and the like are omitted in order to eliminate the complexity of the figure.

In the diaper 1 of the present embodiment, the width of the leg extension portion 60 is set to be relatively wide. For example, in the S size diaper 1 for infants, when the width of the absorbent body 10 is 200 mm, the width of the leg extension portion 60 is set to about 40 mm. Therefore, the leg circumference extending portion 60 can be brought into close contact with the wearer's leg circumference on a wide surface. Therefore, excrement is less likely to leak from around the legs. Further, since the leg circumference extending portion 60 has a wide width, a plurality of (here, four) leg circumference elastic members 61 can be arranged side by side at intervals in the lateral direction. Therefore, the elastic force of the leg rotation extending portion 60 required to prevent lateral leakage can be shared by the plurality of leg rotation elastic members 61. That is, since the elastic force of the leg circumference elastic member 61 can be reduced, it is possible to prevent the burden on the skin due to the local adhesion of the leg circumference elastic member 61.

On the other hand, the waist circumference portions 20 and 30 are provided with waist circumference elastic members 22 and 32 that expand and contract in the lateral direction so that the diaper 1 fits around the waist circumference of the wearer. Therefore, the leg circumference opening forming portion 60a in the leg circumference extension portion 60 may be affected by the waist circumference elastic members 22 and 32, and may be contracted in the lateral direction or turned inward or outward. For example, if the leg opening forming portion 60a is turned up and individually wrapped in the manufacturing process of the diaper 1, the leg opening forming portion 60a will have a crease mark and the leg opening forming portion 60a will be broken. It will be worn in a state.

In particular, the leg extension portion 60 of the present embodiment is formed by the exterior sheet 14 of the absorbent main body 10 and has an overlapping portion 60b with the waist circumference portions 20 and 30. Then, as shown in FIG. 5, a part of the overlapping portion 60b is joined to the waist circumference portions 20 and 30 by the adhesive region 40. Therefore, the overlapping portion 60b is easily affected by the lateral contraction of the waist circumference portions 20 and 30, and the leg circumference opening forming portion 60a may also be laterally contracted or turned over. Then, even though the leg circumference extending portion 60 is set to be wide, the leg circumference extending portion 60 may not be brought into close contact with the wearer's leg circumference on the surface.

Further, here, tentatively, the exterior sheet 14 has a width similar to that of the absorber 12, and the leg circumference extending portion 60 is not formed by the exterior sheet 14, but extends outward from the exterior sheet 14 in the lateral direction. Moreover, it is assumed that it is formed by a side sheet which is a member different from the exterior sheet 14. In this case, the joint between the exterior sheet 14 and the side sheet is exposed on the non-skin side surface around the leg opening forming portion 60a. Further, if both side portions of the exterior sheet 14 in the lateral direction are not folded, a side sheet, which is a member different from the exterior sheet 14, is attached to the skin side surface of the exterior sheet 14, so that the leg circumference opening forming portion 60a is formed. Is formed. In this case, the joint between the exterior sheet 14 and the side sheet is exposed at the lateral outer end of the leg circumference opening forming portion 60a. Then, excrement will seep out from the seams of the sheets.

On the other hand, in the diaper 1 of the present embodiment, the leg circumference extending portion 60 is provided by the exterior sheet 14 that extends laterally outward from the position on the non-skin side surface side of the absorber 12 and is continuous in the lateral direction. Is formed. Further, a plurality of laterally welded regions 62 having a predetermined length (L1 in FIG. 6) in the lateral direction are formed in the leg circumference opening forming portion 60a (“the portion where the extending portion forms the leg circumference opening” in the present invention). It is arranged. The position on the non-skin side surface side of the absorber 12 is a position on the non-skin side in the thickness direction of the absorber 12 and overlaps with the absorber 12 in the lateral direction.

Therefore, in the diaper 1, the lateral welding region 62 increases the rigidity of the leg circumference opening forming portion 60a in the lateral direction, and the leg circumference opening forming portion 60a is affected by the lateral contraction of the waist circumference portions 20, 30 and the overlapping portions 60b. It becomes difficult to receive. As a result, the lateral contraction and turning of the leg circumference opening forming portion 60a are suppressed, and the state in which the leg circumference opening forming portion 60a has a lateral width (wide state) is easily maintained. Then, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on a wide surface, and leakage of excrement from the leg circumference is suppressed.

Further, in the diaper in the natural state (FIG. 1), the leg circumference opening forming portion 60a extends substantially horizontally in the lateral direction, so that the wearer simply passes the leg through the leg circumference opening LH of the diaper 1 to rotate the leg circumference. The opening forming portion 60a is in close contact with the wearer's legs on a surface. Therefore, for example, an operation such as pulling out the leg circumference opening forming portion 60a turned inward with a finger becomes unnecessary, and the diaper 1 is easily and appropriately worn. Further, even while the diaper 1 is worn, the wide state of the leg circumference opening forming portion 60a is easily maintained, and even if the force of pinching the wearer's leg acts, the leg circumference opening forming portion 60a is the wearer's leg. Adhere on the surface around. Further, the wide leg circumference opening forming portion 60a is in close contact with the wearer, so that the buttocks of the wearer can be covered. Therefore, for example, it is not necessary to provide a cover or the like covering the buttocks separately from the waist circumferences 20 and 30, and the diaper 1 can be easily configured.

Further, in the diaper 1, the rigidity of the leg circumference opening forming portion 60a is increased by arranging the lateral welding region 62 in the leg circumference opening forming portion 60a. Therefore, for example, the diaper 1 can be easily manufactured as compared with the case where the rigidity of the leg circumference opening forming portion 60a is increased by arranging another member in the leg circumference opening forming portion 60a.

Further, since the leg circumference extending portion 60 is formed by the exterior sheet 14, it is possible to prevent the seam of the sheet from being exposed on the non-skin side surface of the leg circumference opening forming portion 60a and its surroundings. Further, in the diaper 1 of the present embodiment, since the lateral welding region 62 is arranged in the leg circumference opening forming portion 60a, the side portions of the exterior sheet 14 are folded. Therefore, the seam of the sheet is not exposed at the lateral outer end 60d of the leg circumference opening forming portion 60a. Therefore, in the diaper 1 of the present embodiment, the exudation of excrement from the seam of the sheet is prevented, and the leakage from the leg circumference is further suppressed.

As shown in FIG. 7, the lateral welding region 62 of the present embodiment is a welding portion formed by one protrusion in a dot-shaped welding portion 69 (for example, a protrusion pattern provided on the outer peripheral surface of the emboss roller). ) Are formed by arranging them in the horizontal direction. Specifically, two rows of dots in which three welding portions 69 are arranged at an angle with respect to the horizontal direction are arranged in the horizontal direction and in the vertical direction. Similarly, the vertical welding region 66 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, which are displaced in the vertical direction and arranged in the horizontal direction. In this way, the welded regions 62 and 66 may be partially welded, and in this case as well, the rigidity of the leg circumference opening forming portion 60a in the lateral direction is increased. Not limited to this, for example, even if the planar shape of one protrusion provided on the outer peripheral surface of the embossing roller is made to have the same shape as the welding regions 62 and 66, the entire area of the welding regions 62 and 66 is welded. Good. However, by reducing the shape of one welding portion 69 as in the present embodiment, the pressure applied at the time of welding tends to be constant, and the welding is stabilized.

Further, the predetermined length of the transverse welding region 62 in the lateral direction may be larger than 0 mm, but it is preferable that the transverse welding region 62 has a certain length. For example, when the lateral width of the leg circumference extending portion 60 is 40 mm, the lateral length of the lateral welding 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.

Further, the predetermined lateral length of the lateral welding region 62 (for example, L1 in FIG. 6) is the lateral length of the transverse welding region 62 from one end to the other end in the lateral direction. Therefore, the shape of the lateral welding region 62 may be a shape extending parallel to the lateral direction (not shown) or a shape inclined with respect to the lateral direction as in the present embodiment. However, for example, when the lateral direction of the lateral welding region 62 corresponds to the axial direction of the embossing roller, if the lateral welding region 62 is parallel to the lateral direction, the transverse welding region 62 is instantaneously formed. On the other hand, when the transverse welding region 62 is inclined in the lateral direction, the transverse welding region 62 is formed while pressure is sequentially applied as the embossing roller rotates, so that welding is stable.

Further, the shape of the lateral welding region 62 is not limited to the line shape in which the dot-shaped welding portions 69 are arranged in the horizontal direction as in the present embodiment, and is, for example, a rectangular shape, a trapezoidal shape, an ellipse, a bale shape, etc., which are long in the horizontal direction. You may. Further, the lateral welding region 62 may be formed by arranging not only the dot-shaped welding portions 69 but also welding portions 69 having other shapes such as squares and triangles side by side in the horizontal direction. Further, a plurality of lateral welding regions 62 may be arranged side by side in the lateral direction in the leg circumference opening forming portion 60a. Further, the number of lateral welding regions 62 of the leg circumference opening forming portion 60a may be one or more.

Further, in the diaper 1 of the present embodiment, a plurality of lateral welding regions 62 are also arranged in the overlapping portion 60b of the leg circumference extending portion 60. Therefore, the rigidity of the overlapping portion 60b in the lateral direction is high, and the shrinkage of the overlapping portion 60b in the lateral direction can be suppressed. That is, it becomes difficult for the lateral contraction force of the waist circumference portions 20 and 30 to be transmitted to the leg circumference opening forming portion 60a via the overlapping portion 60b. Therefore, the wide state of the leg circumference opening forming portion 60a can be more easily maintained, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on the surface, and leakage from the leg circumference can be more reliably suppressed.

Further, as shown in FIG. 5, a plurality of laterally welded regions 62 are arranged at regular intervals in the longitudinal direction over the entire area of the leg circumference extending portion 60a in the longitudinal direction, whereby the laterally welded regions 62 are arranged. It becomes easy to adjust the formation interval of. Therefore, the production of the diaper 1 becomes easy.

However, a form in which the transverse welding region 62 is not arranged in the overlapping portion 60b may be used. Further, the lateral welding region 62 may be arranged only on one of the pair of overlapping portions 60b of each leg circumference extending portion 60, and the lateral welding region 62 may not be arranged on the other. In these cases, since the number of the relatively hard laterally welded regions 62 is reduced, the burden on the skin can be reduced and the comfort of wearing the diaper 1 is improved. Further, the leg extension portion 60 does not have to have a pair of overlapping portions 60b. That is, the leg circumference extending portion 60 may overlap only with one of the front waist circumference portion 20 and the rear waist circumference portion 30, or may not overlap with both.

Further, in the diaper 1 of the present embodiment, the leak-proof wall portion 50 is also formed by the exterior sheet 14. In this case, there is no seam of the sheet at the boundary between the leak-proof wall portion 50 and the leg circumference extending portion 60, and leakage from the leg circumference is further suppressed. For example, it is possible to prevent the excrement blocked by the leak-proof wall 50 from seeping out from the boundary between the leak-proof wall 50 and the leg extension 60, and the wearer's legs from becoming dirty.

Further, the exterior sheet 14 extends laterally from the position on the non-skin side surface side of the absorber 12. That is, a pair of leg-circling extending portions 60 are formed by the common exterior sheet 14. Therefore, since the seam of the exterior sheet 14 is not exposed on the non-skin side surface of the absorbent body 10, leakage from the seam of the sheet is suppressed. Further, when the diaper 1 is worn, the pair of leg extension portions 60 are integrally pulled up. Therefore, the pair of leg circumference extending portions 60 can be brought into close contact with the wearer's leg circumference in a well-balanced manner, and leakage from the leg circumference is suppressed.

Further, in the diaper 1 of the present embodiment, a pair of leak-proof wall portions 50 are also formed by the common exterior sheet 14. In this way, one exterior sheet 14 forms a leg circumference extending portion 60 and a leak-proof wall portion 50 on one side in the lateral direction, and one exterior sheet 14 forms a pair of leg circumferences on both sides in the lateral direction. The number of materials can be reduced by forming the extension portion 60 and the pair of leak-proof wall portions 50. Therefore, the cost can be reduced. However, not limited to the above, for example, the leak-proof wall portion 50 and the leg circumference extension portion 60 are formed of different sheets, or the pair of leg circumference extension portions 60 are formed of different exterior sheets 14. The leg extension portion 60 may be formed by a liquid-impermeable back sheet 13.

Further, as shown in FIG. 3, in the leg circumference opening forming portion 60a and the overlapping portion 60b in the leg circumference extending portion 60, the portion of the exterior sheet 14 (that is, the first) in which the first lateral welding region 63 is arranged. The seat portion 14a and the second seat portion 14b) and the portion of the exterior sheet 14 (that is, the third seat portion 14c and the fourth seat portion 14d) in which the second transverse welding region 64 is arranged are the leg rotation extending portions. They are stacked in the thickness direction of 60.

Therefore, the rigidity of the leg circumference opening forming portion 60a and the overlapping portion 60b in the lateral direction is further increased. Further, in order to overlap the first transverse welding region 63 and the second transverse welding region 64, the exterior sheet 14 is folded into four layers. As the number of laminated exterior sheets 14 increases in this way, the rigidity of the leg circumference opening forming portion 60a and the overlapping portion 60b in the lateral direction also increases. Therefore, the overlapping portion 60b is less likely to be affected by the contraction of the waist circumference portions 20 and 30, and the leg circumference opening forming portion 60a is more likely to be maintained in a wider state. Therefore, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on a surface, and leakage from the leg circumference can be suppressed more reliably.

In other words, by overlapping the first transverse welding region 63 and the second transverse welding region 64, even if the welding strength of each lateral welding region 62 is weakened to reduce the rigidity, the leg circumference opening forming portion 60a And the rigidity of the overlapping portion 60b can be ensured. Therefore, the lateral welding region 62 can be made relatively soft, and the comfort of wearing the diaper 1 is improved. Further, as a result of trying to increase the welding strength in order to increase the rigidity of the lateral welding region 62, it is possible to prevent the lateral welding region 62 from becoming too thin or having holes.

However, not limited to the above, the plurality of lateral welding regions 62 may not be overlapped in the thickness direction in the leg circumference opening forming portion 60a and the overlapping portion 60b. In that case, the exterior sheet 14 may be folded into two layers, and the two layers may be welded to form a transverse welding region 62. Further, three or more transverse welding regions 62 may be overlapped in the thickness direction.

Further, as shown in FIG. 6, in the leg circumference opening forming portion 60a, the lateral welding region 62 is arranged inside the lateral outer end 60d of the leg circumference extending portion 60. That is, since the lateral welding region 62 does not exist at the laterally outer end of the leg circumference opening forming portion 60a and is flexible, the wearer's leg circumference feels good on the skin and the comfort of wearing the diaper 1 is improved. .. In addition, the force of pinching the wearer's legs is absorbed. Therefore, the wide state of the leg circumference opening forming portion 60a can be easily maintained even during wearing, and the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on a surface, and leakage from the leg circumference is suppressed.

Further, in the absorbent main body 10, as shown in FIG. 3, the back sheet 13 is between the absorbent body 12 on which the top sheet 11 is wound and the exterior sheet 14 and between the folded exterior sheet 14. Is arranged. As shown in FIG. 2, the lateral outer end 13a of the back sheet 13 is also arranged inside the lateral outer end 60d of the leg circumference extending portion 60. Therefore, the back sheet 13 does not exist at the laterally outer end of the leg opening forming portion 60a and is flexible, so that the wearer's leg circumference feels good and the diaper 1 is more comfortable to wear. .. Further, since the force of pinching the wearer's leg is absorbed, the wide state of the leg circumference opening forming portion 60a is maintained.

Further, as shown in FIGS. 2 and 3, four leg circumference elastic members 61a to 61d are arranged side by side in the leg circumference opening forming portion 60a. The two elastic members around the legs 61b and 61c in the middle intersect with the lateral welding region 62 arranged in the leg circumference opening forming portion 60a. The portion of the leg circumference opening forming portion 60a in which the lateral welding region 62 is arranged has high rigidity, and the planar shape is easily maintained. Therefore, due to the contraction of the leg circumference elastic members 61b and 61c, the portion of the leg circumference opening forming portion 60a in which the lateral welding region 62 is arranged is integrally lifted toward the wearer side. Therefore, as shown in FIG. 7, the portion of the leg circumference opening forming portion 60a in which the lateral welding region 62 is arranged can be brought into close contact with the wearer's leg circumference on a surface, and leakage from the leg circumference is suppressed.

Further, among the four leg-rotating elastic members 61a to 61d, the leg-rotating elastic member 61a located on the innermost side in the lateral direction is arranged at a position between the absorber 12 and the lateral welding region 62 in the lateral direction. Therefore, as shown in FIG. 7, the contraction of the leg elastic member 61a lifts the laterally outer portion of the leg elastic member 61a toward the wearer side, and the standing height is secured. Therefore, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference.

Further, among the four leg circumference elastic members 61a to 61d, the leg circumference elastic member 61d located on the outermost side in the lateral direction is arranged at the position of the lateral outer end 60d of the leg circumference opening forming portion 60a. Therefore, due to the contraction of the leg circumference elastic member 61d, the leg circumference opening forming portion 60a can be firmly brought into close contact with the wearer up to the position of the outer end 60d in the lateral direction. In particular, even when the lateral welding region 62 does not reach the lateral outer end 60d of the leg circumference opening forming portion 60a, the leg circumference opening forming portion 60a can be brought into close contact with the wearer up to the position of the lateral outer end 60d.

Further, the overlapping portion 60b in the leg circumference extending portion 60 is a non-joining region 41 in which the overlapping portion 60b and the waist circumference portions 20 and 30 are not joined at positions corresponding to the lower ends of the waist circumference portions 20 and 30 in the vertical direction. It has (region 41 surrounded by a thick line in FIG. 5). A transverse welding region 62a is arranged in the non-bonded region 41.

Of the overlapping portions 60b, the non-joined region 41 contracts laterally in the waist circumference portions 20 and 30 as compared with the joint region 40 (the shaded area in FIG. 5) with the waist circumference portions 20 and 30. It is hard to be affected by. Therefore, by providing the non-joining region 41 at the boundary portion between the overlapping portion 60b and the leg circumference opening forming portion 60a, the wide state of the boundary portion can be easily maintained. Further, by arranging the transverse welding region 62a at the boundary portion (non-bonding region 41), it becomes easier to maintain the wide state of the boundary portion. As a result, the leg circumference opening forming portion 60a can be easily maintained in a wide state. In other words, the lateral contraction force of the waist circumference portions 20 and 30 is blocked by the lateral welding region 62 of the non-joining region 41, and it becomes difficult to transmit it to the leg circumference opening forming portion 60a. As a result, the wide state of the leg circumference opening forming portion 60a can be easily maintained. Therefore, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on a surface, and leakage from the leg circumference is suppressed.

Further, in addition to the above-mentioned joining region 40, the diaper 1 is provided with joining regions 42, 43, 44 shown in FIG. 3, and is coated with an adhesive. Specifically, the first sheet portion 14a and the second sheet portion 14b of the exterior sheet 14 forming the leak-proof wall portion 50 are joined at the joining region 42. Further, the non-skin side surface of the absorber 12 around which the top sheet 11 is wound and the back sheet 13 are joined at the joining region 43. Further, the back sheet 13 and the exterior sheet 14 are joined at the joining region 44.

On the other hand, in the laterally outer portion 60c of the leg circumference extending portion 60 shown in FIG. The sheet portion 14a and the second sheet portion 14b are not joined by an adhesive over the entire length direction. Similarly, the third sheet portion 14c and the fourth sheet portion 14d of the exterior sheet 14 are not joined by an adhesive over the entire area in the longitudinal direction. That is, in the first sheet portion 14a and the second sheet portion 14b of the exterior sheet 14, the portions between the first transverse welding regions 63 arranged in the longitudinal direction (for example, the portion 65 in FIG. 5) are not joined. Since there is space, the cushioning property is high. Similarly, in the third seat portion 14c and the fourth seat portion 14d of the exterior sheet 14, the portions between the second transverse welding regions 64 arranged in the longitudinal direction are not joined to form a space, so that the cushions are formed. Highly sex. By enhancing the cushioning property of the leg circumference extending portion 60 in this way, the comfort of wearing the diaper 1 is improved.

Further, in the diaper 1 of the present embodiment, since the first transverse welding region 63 and the second transverse welding region 64 are overlapped in the thickness direction, the first sheet portion 14a and the second sheet portion 14b and the second sheet portion 14b having high cushioning properties are overlapped with each other. The 3 sheet portion 14c and the 4th sheet portion 14d are further overlapped with each other. Therefore, the cushioning property of the leg circumference extending portion 60 is further enhanced.

Further, the leg circumference extending portion 60 of the present embodiment is provided with a first vertical welding region 67 and a second vertical welding region 68. Therefore, even if the first lateral welding region 63 is not joined in the first sheet portion 14a and the second sheet portion 14b, the first vertical welding region 67 causes the first sheet portion 14a and the second sheet portion 14b. Is firmly joined. Similarly, the third sheet portion 14c and the fourth sheet portion 14d are also firmly joined by the second longitudinal welding region 68. Therefore, for example, even when the wearer's legs are pinched, the first seat portion 14a and the second seat portion 14b are difficult to separate, and the third seat portion 14c and the fourth seat portion 14d are difficult to separate. The wide state of the peripheral opening forming portion 60a is maintained. However, the form may not have the first longitudinal welding region 67 and the second longitudinal welding region 68.

Further, the transverse welding region 62 of the present embodiment is inclined with respect to the lateral direction. Therefore, for example, the lengths of the non-joined portions of the first sheet portion 14a and the second sheet portion 14b in the vertical direction are shorter than in the case where the transverse welding region 62 is parallel in the lateral direction, and the third sheet portion 14c and the fourth sheet portion 14c The length of the non-joint portion of the sheet portion 14d in the vertical direction is short. Therefore, the first sheet portion 14a and the second sheet portion 14b are difficult to separate, and the third sheet portion 14c and the fourth sheet portion 14d are difficult to separate, so that the wide state of the leg circumference opening forming portion 60a is maintained.

Further, in the overlapping portion 60b of the laterally outer portion 60c of the leg circumference extending portion 60, between the second seat portion 14b of the exterior sheet 14 and the back sheet 13, or between the back sheet 13 and the third exterior sheet 14. It is assumed that the seat portion 14c does not have to be bonded with an adhesive. In particular, by not joining the back sheet 13 and the third sheet portion 14c, both ends of the leg circumference elastic member 61 that is not fixed in the extended state can be contracted, and both ends of the leg circumference extension portion 60 in the longitudinal direction can be contracted. It is possible to prevent the leg circumference elastic member 61 from being exposed from the portion. Further, the third sheet portion 14c and the fourth sheet portion 14d of the exterior sheet 14 are joined to the waist circumference portions 20 and 30 at the adhesive region 40 and the lateral welding region 62, but the first sheet portion 14a and the exterior sheet portion 14 Since the second seat portion 14b is separated from the waist circumference portions 20 and 30, it is less likely to be affected by the lateral contraction of the waist circumference portions 20 and 30. Therefore, the wide state of the leg circumference opening forming portion 60a can be easily maintained. Further, since the lateral welding region 62 is arranged in the overlapping portion 60b even if the above portions are not joined, it is possible to suppress the opening of both ends of the leg circumference extending portion 60 in the longitudinal direction.

On the other hand, in the leg circumference opening forming portion 60a of the laterally outer portion 60c of the leg circumference extending portion 60, between the second sheet portion 14b and the back sheet 13 of the exterior sheet 14, and between the back sheet 13 and the exterior sheet. It is preferable that the third sheet portion 14c of 14 is bonded with an adhesive. By doing so, it is possible to prevent the four layers 14a to 14d of the exterior sheet 14 from being separated when the wearer's legs are pinched, and the wide state of the leg circumference opening forming portion 60a is maintained. ..

Further, as shown in FIG. 6, a plurality of waist circumference elastic members 22 and 32 are arranged at intervals in the vertical direction in the waist circumference portions 20 and 30, and a plurality of lateral welding regions 62 are arranged in the vertical direction in the overlapping portion 60b. They are arranged at intervals. The vertical spacing L3 of the plurality of waistline elastic members 22 and 32 is narrower than the vertical spacing L2 of the plurality of transverse welding regions 62 arranged in the overlapping portion 60b (L2> L3). ..

Therefore, the number of the waist circumference elastic members 22 and 32 is not too small, and the fit of the waist circumference portions 20 and 30 to the wearer can be ensured. That is, the lateral welding region 62 suppresses the lateral contraction of the overlapping portion 60b in the lateral direction to suppress leakage from the leg circumference, and the fit of the waist circumference portions 20 and 30 to the wearer can be ensured. Further, the number of the laterally welded regions 62 arranged in the overlapping portion 60b is not too large, and it is possible to prevent the burden on the skin from being increased by the relatively hard transversely welded regions 62. Further, it is possible to prevent the transverse welding region 62 from becoming the starting point of tearing of the overlapping portion 62 due to the interval between the transverse welding regions 62 becoming too narrow.

However, the present invention is not limited to the above, and the vertical spacing L2 of the lateral welding regions 62 arranged in the overlapping portion 60b may be set to be equal to or less than the vertical spacing L3 of the waistline elastic members 22 and 32. In that case, since the number of the lateral welding regions 62 increases, the lateral shrinkage of the overlapping portion 60b can be more reliably suppressed. Further, the above comparison may be made in comparison with the distance between the waist elastic members 22 and 32 whose vertical positions are the same as those of the overlapping portion 60b, or the distance between the waist elastic members 22 and 32 above the overlapping portion 60b. May be compared with. Further, when the spacing between the transverse welding regions 62 and the spacing between the waistline elastic members 22 and 32 are not constant, if at least one of the spacing between the waist circumference elastic members 22 and 32 is narrower than at least one of the spacing between the transversely welded regions 62. Good.

Further, in a plan view (FIG. 6) of the leg circumference extending portion 60 in the thickness direction, it is preferable that the lateral welding region 62 arranged in the overlapping portion 60b and the waist circumference elastic members 22 and 32 do not overlap. That is, it is preferable that the lateral welding region 62 and the waistline elastic members 22 and 32 are displaced in the vertical direction. By doing so, it is possible to prevent the shrinkage of the elastic members 22 and 32 around the waist that overlap the overlapping portion 60b from being excessively suppressed by the lateral welding region 62, and the elastic members 22 and 32 around the waist are appropriately contracted. To do. Therefore, the elastic members 22 and 32 around the waist can be effectively used, and the fit of the waist circumference portions 20 and 30 to the wearer can be ensured. However, the present invention is not limited to this, and the vertical positions of a part or all of the plurality of transverse welding regions 62 may coincide with the vertical positions of the waistline elastic members 22 and 32.

Further, as shown in FIG. 6, the waistline elastic members 22a and 32a located above the absorber 12 in the vertical direction are from one side of the waistline portions 20 and 30 in the lateral direction to the other side. It extends continuously. On the other hand, the waistline elastic members 22b and 32b having the same vertical position as the absorber 12 extend from one side of the waistline portions 20 and 30 in the lateral direction to one side of the absorber 12 in the lateral direction. And a portion from the lateral side of the absorber 12 to the lateral side of the waist circumferences 20 and 30. That is, the waistline elastic members 22b and 32b have portions (for example, points a to b in FIG. 6) that are discontinuous at the portion overlapping the absorber 12 in the thickness direction of the waistline portions 20 and 30.

Therefore, the absorber 12 is not easily affected by the lateral contraction of the waistline elastic members 22 and 32, and the absorber 12 can be suppressed from twisting. Therefore, the absorber 12 can be brought into close contact with the wearer, and the excrement is firmly absorbed by the absorber 12, so that leakage from the leg circumference is suppressed. Further, by suppressing the twisting of the absorber 12, the leg circumference opening forming portion 60a can be extended substantially horizontally in the lateral direction. Therefore, the leg circumference opening forming portion 60a can be brought into close contact with the wearer's leg circumference on a surface, and leakage from the leg circumference is suppressed.

<Modification example>
9A to 9C are views for explaining a modified example of the transverse welding region 62. The figures on the left side of FIGS. 9A to 9C are views of a state in which the first transverse welding region 63 and the second transverse welding region 64 are formed on the exterior sheet 14 during the manufacturing of the diaper 1. It is a figure which showed the positional relationship of the 1st lateral welding region 63 and the 2nd lateral welding region 64 in the leg circumference extension part 60.

In the above embodiment, as shown in FIG. 4, the first transverse welding region 63 and the second transverse welding region 64 are formed symmetrically with respect to the folding position f2 of the exterior sheet 14, that is, the direction of inclination is It is symmetrical and has the same vertical position. Therefore, in each of the leg circumference opening forming portion 60a and the overlapping portion 60b, the first transverse welding region 63 and the second transverse welding region 64 are arranged so as to overlap in the thickness direction. However, the present invention is not limited to this, and a part or all of the first transverse welding region 63 and the second transverse welding region 64 may not overlap in a plan view in the thickness direction. That is, in each of the leg circumference opening forming portion 60a and the overlapping portion 60b, the position on the plane (position in the horizontal direction and the vertical direction) of the first lateral welding region 63 and the position on the plane of the second transverse welding region 64. It may be out of alignment.

For example, as shown on the left side of FIG. 9A, the first transverse welding region 63 and the second transverse welding region 64 are formed so that the inclination direction is symmetrical with respect to the folding position f2 and the positions in the vertical direction are shifted. May be good. In this case, as shown on the right side of FIG. 9A, in the plan view of the leg extension portion 60, the first transverse welding region 63 and the second transverse welding region 64 inclined in the same direction are alternately arranged in the vertical direction. It is distributed at.

Further, for example, as shown on the left side of FIG. 9B, the first transverse welding region 63 and the second transverse welding region 64 are formed by making the inclination direction the same with respect to the folding position f2 and shifting the vertical position. You may. In this case, as shown on the right side of FIG. 9B, in the plan view of the leg circumference extending portion 60, the first transverse welding region 63 and the second transverse welding region 64 inclined in the opposite direction are alternately arranged in the vertical direction. It is distributed at.

Further, for example, as shown on the left side of FIG. 9C, the first transverse welding region 63 and the second transverse welding region 64 have the same inclination direction with respect to the folding position f2 and the same vertical position. It may be formed. In this case, as shown on the right side of FIG. 9C, in the plan view of the leg circumference extending portion 60, the first transverse welding region 63 and the second transverse welding region 64 inclined in the opposite directions are arranged intersecting each other. ..

As shown in FIGS. 9A and 9B, the first transverse welding region 63 and the second transverse welding region 64 may be completely deviated, or as shown in FIG. 9C, the first transverse welding region 63. And a part of the second transverse 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 transverse welding region 63 and the second transverse welding region 64 are displaced from each other, so that the leg circumference opening forming portion 60a and the overlapping portion 60b have a wider plane range. The lateral welding region 62 is present, and the rigidity of the leg circumference opening forming portion 60a and the overlapping portion 60b in the lateral direction is increased. Therefore, the overlapping portion 60b is less likely to be affected by the lateral contraction of the waist circumference portions 20 and 30, the leg circumference opening forming portion 60a is easily maintained in a wide state, and leakage from the leg circumference is suppressed.

As shown in FIGS. 9A and 9B, when the first transverse welding region 63 and the second transverse welding region 64 are completely deviated from each other, the pressure is sequentially applied during welding, for example, with the rotation of the embossing roller. Since the transverse welding region 62 is formed while being applied, the welding is stable. Further, although not shown, a part of the plurality of first transverse welding regions 63 overlaps with the second transverse welding region 64, and the remaining first transverse welding region 63 overlaps with the second transverse welding region 64. It may be in a non-overlapping form. Further, the plane shape and size of the first transverse welding region 63 and the second transverse welding region 64 may be different, and the planes of the first transverse welding regions 63 and the second transverse welding regions 64 are different from each other. The shape and size may be different. Further, the arrangement of the first lateral welding region 63 and the second lateral welding region 64 may be different between the overlapping portion 60b and the leg circumference opening forming portion 60a. Further, the number of the first transverse welding regions 63 and the number of the second transverse welding regions 64 may be different. For example, by increasing the number of the second lateral welding regions 64 on the non-skin side to be larger than the number of the first lateral welding regions 63 on the skin side, the lateral rigidity of the leg circumference extending portion 60 can be increased. You can improve the feel of your skin while enhancing it.

Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be modified or improved without departing from the spirit of the invention and that the present invention includes equivalents thereof.

For example, the exterior sheet 14 may be a diaper (so-called two-piece type) in which the front waist circumference 20 and the rear waist circumference 30 are connected and integrated. Further, the absorbent article according to the present invention is not limited to the pants-type disposable diaper, but may be a tape-type disposable diaper. In the case of a tape-type diaper or the like, it is sufficient that at least one of the pair of waist circumferences is provided with an elastic member that expands and contracts in the lateral direction. In addition, it can also be used as a shorts type napkin and a urine collecting pad.

1 diaper (absorbent article), 10 absorbent body, 11 top sheet,
12 absorbers, 121 absorbent cores, 122 core wrap sheets,
13 Back sheet (liquid impermeable sheet), 14 Exterior sheet (continuous sheet),
20 Front waistline (girth section), 21 seats, 21 seats,
22 Girth elastic member (elastic member that expands and contracts in the lateral direction),
30 Rear waistline (girth section), 31 seats, 31 seats,
32 Girth elastic member (elastic member that expands and contracts in the lateral direction),
40 Adhesive area, 41 Non-bonded area, 42-44 bonded area,
50 Leakage barrier, 51 Elastic member, 52 End joint, 53 Side joint,
60 Leg circumference extension (extension),
60a Leg circumference opening forming part (the part where the extending part forms the leg circumference opening), 60b Overlapping part,
61 Leg circumference elastic member (elastic member that expands and contracts in the vertical direction), 62 Lateral welding region (welding region),
63 1st transverse welding region (1st welding region), 64 2nd transverse welding region (2nd welding region),
66 Longitudinal welding region, 67 First longitudinal welding region, 68 Second longitudinal welding region, 69 Welded portion,
LH leg opening, BH waist opening

Claims (9)

It has a vertical direction and a horizontal direction,
An absorbent body having an absorber and having a longitudinal direction along the vertical direction,
An absorbent article having a pair of girth portions located on one end side and the other end side in the longitudinal direction of the absorbent body and having elastic members that expand and contract in the lateral direction.
The absorbent body includes a pair of extending portions on both outer sides of the absorbent body in the lateral direction and in which elastic members that expand and contract in the vertical direction are arranged.
The extending portion is formed by a sheet extending outward in the lateral direction from a position on the non-skin side surface side of the absorber and continuing in the lateral direction.
A welding region having a predetermined length in the lateral direction is arranged at a portion where the extending portion forms an opening around the leg .
The welding region has a first welding region and a second welding region.
In the portion where the extending portion forms the leg circumference opening, the portion of the continuous sheet on which the first welding region is arranged and the portion of the continuous sheet on which the second welding region is arranged. Is an absorbent article characterized in that it is folded in the thickness direction of the extension portion . The absorbent article according to claim 1 .
An absorbent article characterized in that at least a part of the first welding region and the second welding region do not overlap in a plan view in the thickness direction. The absorbent article according to claim 1 or 2 .
An absorbent article characterized in that the welded region is arranged inward of the laterally outer end of the extension portion. The absorbent article according to any one of claims 1 to 3 .
The continuous sheet is folded at a portion where the extending portion forms the leg circumference opening.
A liquid-impermeable sheet is arranged between the absorber and the continuous sheet and between the folded continuous sheets.
The liquid-impermeable sheet is an absorbent article characterized in that the extending portion is arranged inside the outer end in the lateral direction. The absorbent article according to any one of claims 1 to 4 .
An absorbent article characterized in that the elastic member arranged in the extending portion and expanding and contracting in the vertical direction intersects with the welding region. The absorbent article according to any one of claims 1 to 5 .
An absorbent article characterized in that the elastic member that expands and contracts in the vertical direction arranged in the extending portion is arranged at a position between the absorber and the welding region in the horizontal direction. The absorbent article according to any one of claims 1 to 6 .
An absorbent article characterized in that the elastic member arranged in the extending portion and expanding and contracting in the vertical direction is arranged at a position of the outer end in the lateral direction of the extending portion. The absorbent article according to any one of claims 1 to 7 .
The absorbent body is provided with a pair of leak-proof walls that can stand up on the wearer side on both sides of the absorbent body in the lateral direction.
An absorbent article characterized in that the leak-proof wall portion is formed by the continuous sheet. The absorbent article according to any one of claims 1 to 8 .
An absorbent article characterized in that the pair of extending portions are formed by the common continuous sheet.

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