TW201838604A - Pants-type absorbent article - Google Patents

Abstract

In this pants-type absorbent article (1), an absorbent main body (10) is provided with an absorbent body (12), leg members (15) provided with a leg elastic member (61) and defining a leg opening (LH), and a sheet member (14) on a non-skin side of the absorbent body (12), and waist parts (20, 30) are provided with waist elastic members (22, 32). The sheet member (14) has, at lateral end parts thereof, a plurality of adhered regions (62) at which the sheet member (14) and the leg members (15) are adhered. The adhered regions (62) have a predetermined length (L1) in the lateral direction. When the leg members (15) are stretched, in a front lower part (FU) that is located in front of and below the leg openings (LH) in a worn state, there is at least one adhered region (62) that is inclined so that the end on the leg opening (LH) side of the adhered region (62) is positioned above the end on the absorbent body (10) side.

Description

Shorts type absorbent article

The present invention relates to a pants-type absorbent article.

In an example of the pants-type absorbent article, the front bag portion 502 and the rear bag portion 506 and the underarm package portion 504 are provided in the patent document 1, and the package portion 502 and the rear package portion 506 are bonded beforehand. A disposable diaper 501 on both sides. The disposable disposable diaper 501, which is formed along the side edge portion of the underarm portion 504, is formed by folding the nonwoven fabric sheet 532, and constitutes the elasticized portions 580 and 581 at the joint portion. 584 joins the expansion and contraction portions 580 and 581 and the air passage forming sheet 583, and forms a flexible air passage structure at the leg opening portion. The joint portion 584 is disposed along the shape of the waist stretchable material 542, and is intermittently disposed. The disposable disposable diaper 501 has leg openings that are open to the left and right. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-210318

[Problems to be solved by the invention]

The infant of the wearer of the disposable diaper which is a shorts type, especially the posture of the foot of a baby of a low age, has a small body and a straight leg, but has two legs with respect to the body with the arched leg. There are many situations in which the posture is extended forward. At this time, if the disposable disposable diaper 501 such as Patent Document 1 is worn on an infant of a low age, the front side of the leg opening portion of the disposable disposable diaper 501 is excessively pressed against the baby's foot or in the leg. A gap is formed between the rear side of the opening and the foot of the infant, and there is a concern that the fit is lowered.

The present invention has been made in view of the above problems, and it is an object of the present invention to improve the adhesion of the leg-opening portion of the pants-type absorbent article. [Means for solving problems]

The main invention for achieving the above object is a vertical direction, a left-right direction, and a front-rear direction orthogonal to the vertical direction and the horizontal direction, and includes an absorbent main body and a pair of waist portions, and the absorbent The main body includes: an absorber; a leg-surrounding member including a leg-surrounding elastic member that expands and contracts in the vertical direction, and is partitioned into a pair of leg-opening portions; and a sheet member positioned on a non-skin side of the absorbent body, the aforementioned one The pair of waist portions are provided with a waist elastic member that expands and contracts in the left-right direction, and the upper end portion of the front side of the absorbent body and the upper end portion of the back side are opposed to each other, and the upper end portion of the front side and the upper end portion of the back side are respectively A pants-type absorbent article in which a pair of waist portions are overlapped, wherein a plurality of welded regions of the sheet member and the leg-worn member are welded to an end portion of the sheet member in the left-right direction, and the welded region is The left-right direction has a predetermined length, and the leg-opening is provided in a wearing state of the pants-type absorbent article. a front side portion of the lower side and a lower front side portion, wherein at least one of the front lower side portions is extended by the leg member, and an end of the side of the leg opening portion of the welding region is absorbed. The side of the side of the body is further inclined to the aforementioned welded region. Other features of the present invention will become apparent from the description of the specification and appended drawings. [Effects of the Invention]

According to the present invention, in the wearing state, in order to form the leg-opening portion, the welding region is opened toward the front side along the rigidity, so that the leg-opening portion can be fitted to the infant such as the arcuate leg to protrude forward. The state of the foot.

[Formation for carrying out the invention]

At least the following matters can be understood from the description of the present specification and the accompanying drawings. A pants-type absorbent article comprising: an up-and-down direction, a left-right direction, and a front-rear direction orthogonal to the vertical direction and the left-right direction, and an absorbent main body and a pair of waist portions, wherein the absorbent body is provided An absorbent body; a leg-surrounding member comprising: a leg-surrounding member that expands and contracts in the vertical direction, and a pair of leg-opening portions; and a sheet member positioned on a non-skin side of the absorbent body, the pair of The waist portion includes a waist elastic member that expands and contracts in the left-right direction, and the upper end portion of the absorbent body and the upper end portion of the back side are opposed to each other, and the upper end portion of the front side and the upper end portion of the back side are respectively paired with the pair a shorts-type absorbent article in which the waist portion is overlapped, wherein the end portion of the sheet member in the left-right direction has a plurality of welded regions in which the sheet member and the leg-worn member are welded, and the welded region is in the left and right The direction has a predetermined length, and the leg-opening portion is provided in the wearing state of the pants-type absorbent article. a front lower side portion located on the lower side, at least one of the front lower side portions is provided to extend the leg member, and an end of the side of the leg opening portion of the welding region is made larger than the absorber The side of the side is further inclined to the aforementioned welded region.

According to such a pants-type absorbent article, in the wearing state, the leg-opening portion is opened toward the front side along the welding region where the rigidity is increased. Therefore, the leg-opening portion can be attached to the infant such as the posture of the arcuate leg. The foot of the child's forward-looking state.

In such a pants-type absorbent article, it is desirable that a plurality of the welded regions are provided between the front end portion of the front side and the upper end portion of the back side along the leg opening portion.

According to such a pants-type absorbent article, since a plurality of wrinkles can be formed in the leg-surrounding members along the leg-opening portion, the touch of the skin during wearing can be improved.

The underpants-type absorbent article includes a rear lower portion located on the lower side of the leg-opening portion in the wearing state of the pants-type absorbent article, and at least a rear lower portion. In a state in which the leg members are extended, it is desirable that the welded region in which the end of the leg-opening portion of the welded region is inclined downward from the end on the side of the absorbent body is desired.

According to such a pants-type absorbent article, the leg-opening portion can be attached to the rear side of the foot of the infant that protrudes forward.

In such a pants-type absorbent article, it is desirable that the plurality of the welded regions have the welded regions that are overlapped with the waist elastic members in the front-rear direction.

According to such a pants-type absorbent article, even if the waist elastic member is contracted in the left-right direction in a natural state taken out from the packaging material, the rigidity of the welded region is increased, so that it is less likely to contract in the left-right direction and is inclined toward the front side. Therefore, the leg-opening portion having the shape toward the front side is easily attached to the foot of the infant.

In the pants-type absorbent article, the pair of waist portions are a front waist portion and a back waist portion, and the pair of waist portions have a portion overlapping the absorbent body in the front-rear direction. In the portion where the waist elastic member is discontinuous, the length of the discontinuous portion of the waist elastic member of the front waist waist portion in the left-right direction is longer than the left-right direction of the discontinuous portion of the waist elastic member of the back waist portion The length is shorter as expected.

According to such a pants-type absorbent article, since the amount of contraction of the waist elastic member of the abdominal waist portion is larger than the amount of contraction of the waist elastic member of the back waist portion, if the waist elastic member contracts in the left-right direction, the ventral side The waist portion is more contracted, and it is easier to form the leg opening portion forward by the highly rigid welded portion.

In the pants-type absorbent article, the leg-retaining elastic members are provided in plural, and each of the leg-hole elastic members is contracted to reduce the leg-opening portion, and the leg-hole elastic member has an inner leg that is provided on the side of the absorbent body in the left-right direction. The outer elastic member and the outer leg elastic member provided on the side of the leg-opening portion, when the outer leg elastic member is extended only by the unit length, when the inner leg elastic member is extended by only one unit length The tension is smaller as expected.

According to such a pants-type absorbent article, an elastic member having a large amount of contraction on the side of the absorber that absorbs excrement is disposed in the left-right direction, and leakage of excrement can be reduced. On the other hand, an elastic member having a small amount of contraction is disposed on the side of the leg-opening portion, and it is easy to fit along the shape of the wearer's foot, and the concern of excessively tightening the foot of the infant can be alleviated.

In such a pants-type absorbent article, in a state in which the leg-holding members are stretched, it is desirable that the distance between the welded regions adjacent to each other in the vertical direction is shorter than the length in the horizontal direction of the welded region.

According to such a pants-type absorbent article, since finer wrinkles are formed between the welded regions adjacent to each other in the vertical direction, the touch of the skin during wearing can be improved.

In the pants-type absorbent article, the leg-surrounding elastic members are provided in a plurality of the leg-surrounding members, and the leg-surrounding members are provided in a region overlapping the welding region in the front-rear direction in a state in which the leg-holding members are extended. In the middle of the longest interval between the leg elastic members adjacent to each other in the left-right direction, it is desirable that the distance between the welded regions adjacent to each other in the vertical direction is longer.

According to such a pants-type absorbent article, it is easy to form wrinkles which are continuous in the left-right direction, and it is possible to improve the touch of the skin during wearing. Moreover, since a plurality of wrinkles are easily formed in the right and left direction, the rigidity of the leg-flange member in the left-right direction is increased, and the waist opening portion can be easily formed forward.

In such a pants-type absorbent article, the welding region has a plurality of welded portions, and the plurality of welded portions are disposed at a predetermined interval as desired.

According to such a pants-type absorbent article, when the rigidity of the welded region is increased, a plurality of welded portions are arranged at predetermined intervals. Therefore, the region where the welded portions are not welded to each other is easily conformed to the wearer's leg circumference. Since the operation is performed, the wearer can reduce the movement of the foot by the pants-type absorbent article.

In the pants-type absorbent article, the length of the absorbent body in the left-right direction in the crotch portion is longer than the length of the absorbent body in the front-rear direction overlapping the upper end portion of the front side and the upper end portion of the back side. Shorter than expected.

The side portion from the end of the absorbent body in the left-right direction to the end of the leg-surrounding member is more rigid than the absorbent body. In the inter-turn portion, the length of the absorber in the left-right direction is shortened, and the length of the lateral portion in the left-right direction is increased. When the leg-surrounding elastic member contracts, the lateral portion is easily pulled upward. Thereby, the lower portion of the leg-opening portion in the wearing state can be easily attached to the wearer's foot.

=== EMBODIMENT EMBODIMENT === In the pants-type absorbent article of the present invention, the following embodiments will be described by taking "a shorts-type disposable diaper" as an example. The pants-type disposable diaper of the present embodiment can be used as an infant or as an adult. Moreover, the pants-type absorbent article of the present invention can be used, for example, as a sanitary panty-type sanitary napkin, in addition to disposable diapers.

=== Basic structure of disposable diaper for shorts type === Fig. 1 is a schematic perspective view of a disposable diaper 1 (hereinafter referred to as "diaper") for a shorts type. FIG. 2 is a schematic plan view of the diaper 1 in an expanded state as seen from the side surface side of the skin. Fig. 3 is a schematic cross-sectional view taken along the line A-A in Fig. 2 . In addition, the "elongated state" is a state in which the elastic member provided in the diaper 1 is extended until the wrinkles of the diaper 1 are not considered to be satisfactory. Specifically, the size of each member constituting the diaper 1 (for example, the abdominal waistline portion 20 to be described later) is extended to a size that is equal to or close to the size of the member alone. Moreover, the C-C line in FIG. 2 is the center line in the left-right direction.

As shown in FIG. 1, the pants-type diaper 1 has a vertical direction, a left-right direction, and a front-back direction, and the diaper 1 is formed with the waist opening part BH and the pair of leg circumference opening part LH. In the up-and-down direction, the waist opening portion BH side is referred to as the upper side, and the wearer's underarm side is referred to as the lower side. The vertical direction of the diaper 1 in the state (expanded and stretched state) of FIG. 2 is also referred to as "longitudinal direction", and one side in the longitudinal direction is referred to as "ventral side", and the other side is referred to as "back side". The side of the substantially central portion C10 in the longitudinal direction is also referred to as "lower side". In the front-rear direction, the side of the wearer's ventral side is referred to as the front side, and the side of the wearer's back side is referred to as the rear side. Further, the diaper 1 has a thickness direction as shown in FIG. 3, and the side in contact with the skin of the wearer in the thickness direction is the skin side, and the opposite side is the non-skin side.

The diaper 1 is a so-called three-member type and has an absorbent body 10 and a pair of waist portions 20 and 30. The absorbent body 10 has a substantially rectangular shape in plan view, and the fold line mm in FIG. 2 is folded in half to face the front side upper end portion 10f of the absorbent body 10 opposite to the back side upper end portion 10b, and the ventral upper end portion 10f and the back side upper end portion. 10b is overlapped with the waist portions 20, 30, respectively. Further, the ventral upper end portion 10f is an end portion on the ventral side of the absorbent body 10, and is referred to as a portion overlapping the waist portion 20. The back side upper end portion 10b is an end portion of the back side of the absorbent body 10, and is referred to as a portion overlapping the waist portion 30. The waist portions 20 and 30 have a substantially rectangular shape in plan view, and the longitudinal direction thereof is along the left and right direction. The abdominal side portion of the pair of waist portions 20 and 30 that covers the wearer is also referred to as the abdominal waist portion 20, and the back side portion that covers the wearer is also referred to as the back waist portion 30.

As shown in the unfolded state of Fig. 2, the disposable diaper 1 has a shape that is bilaterally symmetrical with respect to the center line C-C. The non-skin side surface of the absorbent upper body 10f, the non-skin side surface of the back upper end portion 10b, and the skin side surface of the waistline portions 20, 30 are joined by an adhesive or the like, and the folded absorbent body 10 is folded from the unfolded state shown in FIG. The front waist portion 20 and the back waist portion 30 are opposed to each other, and the left and right side portions 20a of the front waist portion 20 and the left and right side portions 30a of the back waist portion 30 are joined to each other, and the disposable diaper 1 is provided. Become a shorts type.

Each of the front waist portion 20 and the back waist portion 30 includes a plurality of flexible sheets (21 and 21, 31 and 31) such as non-woven fabric, and a plurality of elastic members 22 and 32 such as a thread rubber that expands and contracts in the left-right direction. In the following description, the elastic members 22, 32 are also referred to as waist elastic members 22, 32. The plurality of waist elastic members 22 and 32 are fixed between the two sheets (21 and 21, 31 and 31) while being stretched in the left-right direction while being arranged at intervals in the vertical direction. Therefore, the abdominal waistline portion 20 and the back waistline portion 30 can be expanded and contracted in the left-right direction and attached to the wearer's waist circumference.

As shown in FIG. 3, the absorbent main body 10 is provided in order from the skin side in the thickness direction, the leg-surrounding member 15, the top sheet 11, the absorber 12, the back sheet 13, and the exterior sheet 14. The top sheet 11 may be a liquid permeable sheet, and examples thereof include a hydrophilic hot air non-woven fabric, a spunbonded nonwoven fabric, and the like. 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. The exterior sheet 14 and the leg surrounding member 15 may be a liquid permeable sheet or a liquid impervious sheet. However, in the present embodiment, the leakage preventing wall portion 50 and the leg-surrounding portion LH are formed by the exterior sheet 14 and the leg-surrounding member 15, and therefore, a hydrophobic SMS nonwoven fabric or the like can be exemplified as the exterior sheet 14 and Leg member 15.

The absorber 12 is a rectangular shape in plan view, and includes an absorbent core 121 that absorbs liquid and a core clad sheet 122 that covers the outer peripheral surface of the absorbent core 121. In the absorbent core 121, the liquid absorbing material is formed into a predetermined shape. In the present embodiment, a substantially hourglass shape in which the central portion in the longitudinal direction is narrowed is formed. The liquid absorbing material such as pulp fibers contains a highly absorbent polymer (so-called SAP). The core-coated sheet 122 can be exemplified by a liquid-permeable sheet such as a tissue or a nonwoven fabric. Further, the core clad sheet 122 is not possible.

Further, the absorbent main body 10 includes a pair of leakage preventing wall portions 50 and a pair of leg circumference extending portions 60. As will be described later, in the present embodiment, as shown in FIGS. 3 and 4, both sides in the left-right direction of the outer sheet 14 are folded, and the end portions of the folded outer sheet 14 in the left-right direction and the leg portions that are folded in half are formed. The member 15 is joined, and the leg-extending portion 60 is formed in a portion from the joined portion (the welded region 62 to be described later) to the outer side in the left-right direction.

The pair of leakage preventing wall portions 50 are so-called three-dimensional folded edges and are provided on both side portions of the absorbent body 12 in the left-right direction along the longitudinal direction of the absorbent body 10. Specifically, it is provided at a position extending from a position overlapping the absorber 12 in the left-right direction. Each of the leakage preventing wall portions 50 includes a leakage preventing wall elastic member 51 that expands and contracts in the longitudinal direction (the vertical direction of the diaper 1), and includes an exterior sheet 14 that forms the leakage preventing wall portion 50 and a leg member 15 that is joined to each other. The top sheet 11 and the pair of end joint portions 52 of the back sheet 13 and the side joint portion 53. The pair of end joint portions 52 are disposed at both end portions in the longitudinal direction of the absorbent body 10, and the side joint portion 53 extends from one end in the longitudinal direction of the absorbent body 10 to the other end, and is more than the end joint portion 52. It is arranged on the outside in the left and right direction. Therefore, in the leakage preventing wall portion 50, by the contraction of the leakage preventing wall elastic member 51, the portion of the outer sheet 14 between the pair of end joining portions 52 is made to be on the wearer side with the side joining portion 53 as a base point ( The skin side in the thickness direction is raised. Therefore, the excretion of the side stream can be blocked by the leakage preventing wall portion 50. However, the diaper 1 may not have the leakage preventing wall portion 50.

The pair of leg-surrounding portions 60 are portions on the outer sides of the leakage preventing wall portion 50 in the left-right direction. Moreover, as shown in FIG. 2, each leg circumference extension part 60 has the "leg circumference opening formation part 60a" which forms the leg-hole opening part LH, and each of the abdominal side waist part 20 and the back side waist part 30 up and down. "Repeating portion 60b" and "repeating portion 60c" in which the direction is repeated. In other words, the "repeating portion 60b" is also a portion where the front end portion 10f of the absorbent body 10 overlaps the abdominal waist portion 20, and the "repeating portion 60c" is also the back side upper end portion 10b and the back side waist circumference of the absorbent body 10. The portion where the portion 30 is repeated, the "leg-opening forming portion 60a" is also between the ventral upper end portion and the back-side upper end portion of the absorbent body 10. In addition, each of the leg-extending portions 60 includes seven elastic members 61 (hereinafter also referred to as leg-surrounding elastic members 61) that are stretched and contracted in the longitudinal direction (the vertical direction of the diaper 1) and are arranged at intervals in the left-right direction. Therefore, the leg-opening forming portion 60a in the leg-surrounding portion 60 is divided into the leg-opening portions LH and fitted to the wearer's leg circumference.

Further, a plurality of welding regions 62 that extend in the left-right direction and are inclined with respect to the left-right direction are disposed in each of the leg-surrounding portions 60. As shown in FIG. 2, a plurality of welded regions 62 are arranged at intervals in the longitudinal direction in the entire longitudinal direction of the leg-extending portion 60, and along the leg between the upper end portion of the ventral side and the upper end portion of the back side. The surrounding opening forming portion 60a is provided. The details of the fusion zone 62 will be described later.

In addition, a filament-shaped elastic member such as a thread rubber is exemplified as an elastic member (22, 32, 51 having the abdominal waist portion 20, the back waist portion 30, the leakage preventing wall portion 50, and the leg extending portion 60, 61), but is not limited to this. For example, a sheet-like elastic member such as a stretchable film or a stretchable nonwoven fabric may be disposed in a single or plural number instead of the thread rubber. Moreover, the drawing only shows a portion where the elastic member is stretched (so-called effective long portion). Therefore, in the outer side in the longitudinal direction of the illustrated elastic member, there may be a portion where the elastic member that does not have stretchability is present. Moreover, the arrangement and the number of the elastic members are not limited to the illustrated configuration.

===Method of Forming Absorbent Body 10 === Next, a method of forming a pair of leakage preventing wall portions 50 and a pair of leg circumference extending portions 60 of the absorbent body 10 will be briefly described with reference to FIG. 4 . . 4A is a view for explaining a method of forming the absorbent body 10. Fig. 4B is a schematic cross-sectional view taken along the line B-B in Fig. 4A. In addition, in FIG. 4B, the skin side in the thickness direction is also referred to as "upper side", and the non-skin side is also referred to as "lower side".

The leg-surrounding member 15 before being welded to the exterior sheet 14 is in a state substantially the same as the folding line f1 and in a state in which the respective leakage preventing wall elastic members 51 are elongated in the longitudinal direction as shown on the left side of FIGS. 4A and 4B. It is fixed to the inner side of the folding line f1 in the left-right direction. The fold line f1 is a fold line for folding the leg-surrounding member 15 in half, and is substantially the center in the left-right direction of the leg-surrounding member 15 shown on the left side of FIGS. 4A and 4B. First, the fold line f1 is folded toward the skin side (the inner side in the left-right direction) in the thickness direction of the leg-surrounding member 15.

As shown in the right side of FIG. 4A and FIG. 4B, in the state in which the exterior sheet 14 and the leg-surrounding member 15 are respectively extended in the longitudinal direction, the outer end portion of the outer sheet 14 in the left-right direction and the leg circumference are fixed. The inner end portion of the member 15 in the left-right direction is integrated. The fixing of the outer sheet 14 and the leg surrounding member 15 is performed by welding. Specifically, the leg-surrounding member 15 and the outer sheet 14 which are two layers which are folded are welded together to form a welded region 62. As shown in the right side of FIG. 4A, a plurality of welded regions 62 having a downwardly inclined shape which is inclined downward from the inner side in the left-right direction toward the outer side are provided on the front side of the fold line mm (underarm), and for the back side of the fold line mm, An obliquely-shaped welded region 62 that is inclined upward from the inner side in the left-right direction toward the outer side is provided at intervals in the longitudinal direction. The welding region 62 may be formed by a known welding method, and examples thereof include heat fusion, ultrasonic welding, and welding by laser irradiation.

In the state of the right side of FIG. 4A and FIG. 4B, the outer side of the skin is fixed to the side of the skin in a state in which the seven leg-hole elastic members 61 are elongated in the longitudinal direction in the inner side in the left-right direction. In the center portion of the sheet 14 in the left-right direction, the back sheet 13 and the top sheet 11 of the absorber 12 are sequentially superposed from the non-skin side surface and joined.

In the upper side of the portion of the leg-surrounding member 15 which is a two-layered leg, the end joining portion 52 and the side joining portion 53 for forming the leakage preventing wall portion 50 are applied to the outer side in the left-right direction of the absorbent body 12. Further, between the absorber 12 and the welded region 62, the fold line f2 at almost the same position as the leg-surrounding elastic member 61 located most outward in the left-right direction, the both sides of the outer sheet 14 in the left-right direction are directed toward the top sheet 11 is further folded outward in the thickness direction, and the leakage preventing wall portion 50 and the leg circumference extending portion 60 are fixed to the back sheet 13 and the exterior sheet 14 by an adhesive applied to the end joint portion 52 and the side joint portion 53. The absorbent body 10 shown in Figs. 2 and 3 can be formed. In other words, in the welding region 62, a total of three layers of the leg-surrounding member 15 folded in two layers and the outer sheet 14 in one layer are superposed. The leakage preventing wall portion 50 is mainly formed by the leg surrounding member 15, and the leg circumference extending portion 60 is formed by the exterior sheet 14 and the leg surrounding member 15.

=== leg circumference extension portion 60 === Fig. 5 is a view for explaining the ventral side of the diaper 1 in an enlarged state and in an extended state. In the diaper 1, since the leg-surrounding portion 60 is provided, since the wide surface can be in close contact with the leg circumference, leakage of excrement from the leg-opening portion LH can be reduced. In the diaper 1, for example, an S-sized diaper for infants has a length in the left-right direction of the absorbent body 10 of about 170 mm, and a length in the left-right direction of the leg-extending portion 60 of about 23 mm. Moreover, since the contraction force necessary for the leg-opening portion LH can be imparted by the plurality of leg-surrounding elastic members 61 disposed in the leg-surrounding portion 60, leakage of excrement from the leg-opening portion LH is further reduced. Further, since the leg-hole elastic members 61 are arranged at intervals in the left-right direction, the elastic force of each of the leg-hole elastic members 61 can be reduced, and the partial contact of the leg-hole elastic members 61 against the skin can be prevented.

The leg-extending portion 60 of the diaper 1 is mainly formed by welding the outer sheet 14 of the absorbent body and the welded region 62 of the leg-surrounding member 15. As shown in FIGS. 2 and 5, a plurality of welding regions 62 are provided along the longitudinal direction at a constant interval in the longitudinal direction of the absorbent body 10. Each of the welded regions 62 has a predetermined length in the left-right direction (L1 in FIG. 7), and the end on the leg-opening portion LH side is inclined upward from the end on the side of the absorber 12. Specifically, the angle smaller than the angle θ formed by the fused region 62 along the imaginary straight line in the left-right direction is 3 degrees. The predetermined length in the left-right direction having the welded region 62 may be larger than 0 mm, but it is preferable to have a certain length. For example, when the length of the leg-surrounding portion 60 in the left-right direction is 23 mm, the length of the welding region 62 in the left-right direction is preferably in the range of 3.5 mm to 20 mm, and more preferably about 19 mm.

Fig. 6A is a view showing the diaper 1 in an extended state and in an unfolded state. In the state in which the baby diaper 1 is worn (hereinafter referred to as "wearing state"), the "front lower side portion" located on the lower side of the leg-opening portion LH of the diaper 1 and located on the lower side means the one shown in FIG. 6A. The front lower side portion FU of the disposable diaper 1 in the stretched state and the unfolded state, that is, the leg-side opening forming portion 60a is substantially on the ventral side (upper side) with respect to the fold line mm, and between the fold line mm and the lower end of the ventral waist portion 20. The leg circumference extends to the area of the portion 60. Similarly, the "rear lower side portion" which is located on the rear side of the leg-opening portion LH of the diaper 1 and is located on the lower side in the wearing state refers to the rear lower side portion BU of the diaper 1 shown in FIG. 6A, that is, the leg circumference. In the opening forming portion 60a, the region of the leg-extending portion 60 is substantially the middle between the fold line mm back side (upper side) and the fold line mm and the back side waist portion 30.

As shown in FIG. 6A, in a state where the leg-hole elastic member 61 and the leakage-proof wall elastic member 51 are extended, at least the outer side (the leg-opening portion LH side) of the welded region 62 of the front lower portion FU is located in the left-right direction. The end is inclined more toward the upper side than the end on the inner side (absorbent body 12) side in the left-right direction. In this case, even in the natural state of the diaper 1 shown in FIG. 6B in which the elastic members 61 and 51 are stretched, the outer side in the left-right direction of the welded region 62 of the front lower side portion FU (leg-opening) The end of the portion LH side is inclined more toward the upper side than the end on the inner side (absorbent body 12) side in the left-right direction. Fig. 6B is a view showing the diaper 1 in a natural state and in an unfolded state. Further, by the contraction of the elastic members 61, 51, the angle θ formed by the welded region 62 and the imaginary straight line along the left-right direction is less than 3 degrees. From this, it is understood that the welded region 62 is in either the extended state or the natural state, that is, the end of the welded portion 62 on the leg-surrounding portion LH side is closer to the end of the absorbent body 12 than the elastic member. Tilt more toward the top. The leg-opening portion LH is formed toward the front side (ventral side) by the welded region 62 provided in the front lower side portion FU.

The reason why the leg-opening portion LH due to the welding region 62 faces the front side will be described with reference to Fig. 7 . Fig. 7 is a schematic view showing the principle of the leg-opening portion LH of the diaper 1. FIG. 7 is a view of the diaper 1 in a worn state viewed from the lower side (the lower side of the crotch), and the members formed in the wrinkles of the disposable diaper 1, the absorbent body 12, the elastic member, and the like are conveniently omitted. Further, the fold line m-m is the portion which is most located on the lower side when worn, and is also the "bottom portion" when worn.

Since the welded region 62 is a region that is welded by a known welding method, the rigidity is higher than that of the portion that is not welded. Since the welded region 62 of the front lower portion FU in the unfolded state shown in FIG. 6A and FIG. 6B has a relatively high rigidity, even in the wearing state, the outer side (the leg-opening portion LH side) of the left-right direction is closer to the left and right. The end on the inner side (absorbent body 12) side of the direction is more likely to have a shape inclined toward the front side (ventral side). That is, as shown in Fig. 7, in the wearing state, the plurality of welded regions 62F, 62F, 62F provided in the front lower portion FU are in the front-rear direction, and the end 62Fh on the leg-opening portion LH side is the absorbent body 12. The side end 62Fa is inclined more on the front side. In addition to the high rigidity of the welded portion 62F, since the end 62Fa on the side of the absorbent body 12 is closer to the absorbent body 12 having a higher rigidity, the end portion 62Fh on the side of the leg-opening portion LH does not have the absorbent body 12 with respect to the movement. The action of the side end Fa is limited. In other words, since the end 62Fh on the leg-opening portion LH side has a higher degree of freedom in operation than the end 62Fa on the side of the absorber 12, the welded region 62F is inclined from the rear side (back side) toward the front side (ventral side). It is assumed that the leg-opening portion LH is opened toward the front side in comparison with the case where the welded region 62 is formed in parallel in the left-right direction. Thereby, in the front side and the lower side of the diaper 1 in the wearing state, it is easy to fit the foot of the infant who has a large posture in which the leg is extended forward by the arcuate leg. When the foot of the infant is more closely attached to the leg-opening portion LH, not only the leakage of the excrement is reduced, but also the feeling of discomfort such as excessively tightening the leg circumference of the infant or feeling partial tightening can be alleviated.

Similarly, as shown in FIG. 6A and FIG. 6B, in the extended state and the natural state, the diaper 1 has the outer side in the left-right direction (the side of the leg-opening portion LH side) on the inner side in the left-right direction (the absorber 12). The welded end region 62 whose side end is inclined toward the upper side. By the welded region 62 provided in the rear lower side portion BU, the leg-opening portion LH can be more easily directed toward the front side.

As shown in Fig. 7, in the wearing state, the plurality of welded regions 62B, 62B, and 62B provided in the rear lower portion BU are in the front-rear direction, and the end 62Bh on the leg-opening portion LH side is higher than the absorbent body 12 at the front and rear sides. The side end 62Ba is inclined more on the front side. In the same manner as the welding region 62F, the end portion 62Ba on the side of the absorber 12 is close to the side of the absorber 12, so that the operation is restricted, but the end 62Bh on the leg opening portion LH side is more absorbed. The end of the body 12 side 62Ba is easily moved, and the welded region 62B is formed to have a shape inclined from the rear side (back side) toward the front side (ventral side). The shape in which the leg-opening portion LH is opened toward the front side can be formed more than the case where the welded region 62 is formed in parallel in the left-right direction. Thereby, the back side and the lower side of the diaper 1 in the wearing state can be easily attached to the foot of the infant in the posture in which the foot is extended forward.

Further, in the diaper 1, a plurality of welded regions 62 are provided at intervals between the front end portion 10f of the front side and the upper end portion 10b of the back side along the leg opening portion LH. That is, as shown in FIG. 2 and the like, a plurality of welding regions 62 are intermittently arranged along the longitudinal direction between the lower end of the abdominal waist portion 20 and the lower end of the back waist portion 30. Therefore, since more wrinkles can be formed between the welded regions 62 adjacent in the up-and-down direction, the baby can feel the touch of the skin well when worn.

Further, as shown in FIG. 5, in the diaper 1, since the welded regions 62 are arranged at regular intervals in the vertical direction, L2 is constant, and the length L1 of the welded region 62 in the left-right direction is also constant. At this time, the interval L2 between the welded regions 62 adjacent in the vertical direction is shorter than the length L1 of the welded region 62 in the left-right direction (L2 < L1). For example, when the distance L2 between the welded regions 62 adjacent in the vertical direction is longer than the length L1 in the left-right direction of the welded region 62 (L2>L1), only the regions of the welded regions 62 adjacent in the vertical direction are generated by one. The wrinkles of large wrinkles or unequal sizes cause a decrease in the tactile sensation of the skin. In this case, the distance L2 between the welded regions 62 adjacent to each other in the vertical direction is shorter than the length L1 in the left-right direction of the welded region 62 (L2 < L1), so that the welded regions 62 adjacent to each other in the vertical direction are different from each other. When the interval L2 is longer than the length L1 of the welded region 62 in the left-right direction (L2>L1), further fine wrinkles can be formed in the region where the welded region between the adjacent welded regions 62 in the vertical direction is not applied. It can enhance the touch of the skin when worn. Further, by arranging the welded regions 62 at equal intervals in the vertical direction, the wrinkles between the adjacent welded regions 62 can be set to substantially the same size, so that the touch of the skin can be further improved.

Further, in the leg-hole elastic members 61 provided in the region overlapping the welding region 62 in the front-rear direction, the welding regions adjacent to each other in the vertical direction are longer than the longest interval L3 between the leg-hole elastic members 61 adjacent to each other in the left-right direction. 62 is spaced apart from each other by L2 (L3 < L2). That is, the interval between the leg-hole elastic members 61 adjacent to each other in the left-right direction overlapping the welded region 62 is shorter than the interval L2 between the welded regions 62. Thereby, the interval L2 between the welded regions 62 adjacent to each other in the up-and-down direction is shorter than the longest interval L3 between the leg-hole elastic members 61 adjacent to each other in the left-right direction (L3>L2), because it is easy to form the left-right direction continuously. The wrinkles, therefore, can enhance the touch of the skin when worn. In addition, when the wrinkles which are continuous in the left-right direction are easily formed, the rigidity of the leg-surrounding portion 60 in the left-right direction is increased, and the effect of making the leg-opening LH easy to open forward in the welded region 62 can be further improved.

Further, each of the diapers 1 has a welded region 62 which is repeated in the front-rear direction with the waist elastic members 22 and 32. For example, as shown in FIG. 5, there is one welded region 62x which is overlapped with the waist elastic member 22 in the front-rear direction. In a natural state in which the waist elastic members 22, 32 are contracted (for example, a state in which the diaper 1 in the packaged state is taken out for about 15 minutes), a force to be contracted in the left-right direction is applied to the welded region 62x. When such a force acts, the welded region 62x is contracted to some extent, and the entire welded region 62x is easily inclined toward the front side or the rear side. Here, the leg-surrounding portion 60 of the diaper 1 has the welded region 62 in the front lower portion FU (the rear lower portion BU), and the leg-surrounding opening LH is easily directed toward the front side. Therefore, the welded region 62x is such that the outer end is inclined toward the front side toward the inner side in the left-right direction, and interacts with the welded portion 62 provided in the front lower side portion FU (the rear lower side portion BU), so that the leg opening LH is made. It is easier to face the front side.

Furthermore, in the present embodiment, the length in the left-right direction of the discontinuous portion of the abdominal waist portion 20 is shorter than the length in the left-right direction of the discontinuous portion of the back waist portion 30, and the leg circumference is opened. The LH is easier to open on the front side. Specifically, as shown in FIG. 2, the abdominal waist portion 20 of the diaper 1 has a discontinuous portion of the waist elastic member 22 (for example, the point 22d to the point 22e of FIG. 2), and the back waist portion 30 has the waist elastic member 32. A continuous portion (for example, point 32d to point 32e of Fig. 2). The portion where the waist elastic members 22 and 32 are discontinuous is in the vicinity of the center portion in the left-right direction of the waist portions 20 and 30, and the stretching force does not act in the region overlapping the absorber 12. Thereby, the contraction of the absorber 12 in the left-right direction is suppressed, and the absorber 12 is easily maintained substantially flat, and leakage of excrement or the like is suppressed.

At this time, the length in the left-right direction (between the point 22d and the point 22e) of the discontinuous portion of the abdominal waist portion 20 is longer than the length of the discontinuous portion of the back waist portion 30 (point 32d and point 32e). Between) is shorter. In the diaper 1, the length of the discontinuous portion of the abdominal waist portion 20 in the left-right direction is 70 mm, and the length of the discontinuous portion of the back waist portion 30 in the left-right direction is 80 mm. Thereby, in the state in which the waist elastic members 22 and 32 in the natural state are contracted, the contraction amount of the waist elastic member 22 of the abdominal waist portion 20 is larger than the contraction amount of the waist elastic member 32 of the back waist portion 30, Therefore, in the natural state, the force in which the entire disposable diaper 1 contracts toward the front side becomes strong. Thereby, the both side portions 20a and 30a of the diaper 1 in the left-right direction are easily pulled toward the front side, respectively, and the leg openings are opened to the front opening by the welded regions 62 formed in the front lower side portion FU and the rear lower side portion BU. The part LH is easier to face the front side and is easy to fit on the foot of the infant.

Figure 8 is an enlarged view of the welded region 62 in the portion Y of Figure 5. Further, in the convenience of Fig. 8, the members of the elastic members 22, 61 and the like are omitted. As shown in FIG. 8, the welding region 62 of the diaper 1 is formed by forming a plurality of dot-shaped welded portions 69 by a right-and-left direction (for example, a projection formed by a projection pattern provided on the outer circumferential surface of the embossing roller) is formed. unit). Specifically, two dot rows arranged in the four welded portions 69 inclined in the left-right direction are shifted in the left-right direction and arranged in the vertical direction, and the welded portions 69 are arranged at equal intervals. In other words, the welding region 62 is an inclined shape having a predetermined length in the left-right direction, that is, an external wiring having a plurality of welded portions 69 and having a plurality of welded portions 69 arranged at equal intervals at predetermined intervals (Fig. The dotted line in 8) is the enclosed area.

The welding region 62 is preferably formed by a plurality of dot-shaped welded portions 69 such as the diaper 1. The welded region 62 is formed by a plurality of dot-shaped welded portions 69, and the leg-surrounding portion 60 can be made into a softer skin feel than when the welded region 62 is used as a welded portion. Further, the welded portion 69 which is increased in rigidity due to welding is disposed at intervals, and the soft portion which is not welded in the welded portion 62 easily follows the operation of the leg circumference of the infant.

Further, the shape of the welded portion 69 may be appropriately changed to an elliptical shape, a rhombic shape, a rectangular shape, or the like, for example, as appropriate. Further, the strip-shaped welded region 62 may be formed by adjusting the size of one of the welded regions 62 or the interval 2 between the adjacent welded regions 62 in the longitudinal direction (vertical direction).

Further, the plurality of leg-surrounding elastic members 61 of the diaper 1 are attached to the legs of the infant at the leg-opening portions LH. The tension of the leg-surrounding elastic member 61 differs depending on the thickness of the elastic member and the leg-surrounding member 15 in a state in which the leg-surrounding elastic member 61 is stretched in the state in which the diaper 1 is manufactured. In the diaper 1, a thread rubber is used as the leg elastic member 61. As shown in Fig. 5, in the leg-surrounding elastic member 61, the tension when the inner leg-surrounding elastic member 61i which is the most on the side of the absorbent body 12 is extended only by the unit length is set to be the most on the side of the leg-opening portion LH. The outer leg elastic member 61o has a smaller tension when only the unit length is extended. That is, the tension of the leg-surrounding elastic member 61 closer to the absorbent body 12 is set larger in the right and left direction, and the leakage of the excrement in the left-right direction is reduced. In the right and left direction, the tension of the leg-hole elastic member 61 closer to the leg-opening portion LH is made smaller, and it is easy to fit the shape of the foot of the wearer's infant, and the excessive tightening can be alleviated. The concerns of the feet of infants and young children.

Further, the absorbent body 12 of the diaper 1 is a portion located in the crotch portion in the wearing state, and in the unfolded state shown in Fig. 2, the length L12m of the absorbent body 12 of the portion of the fold line mm in the left-right direction is compared with the belly. The length L12f of the side upper end portion 12f in the left-right direction of the absorber 12 which is repeated in the front-rear direction is shorter. Similarly, the length L12m of the absorber 12 in the left-right direction of the portion of the fold line m-m is shorter than the length L12b of the absorber 12 in the left-right direction overlapping the back-side upper end portion 12b in the front-rear direction.

From the end of the absorbent body 12 in the left-right direction to the outer end of the leg-extending portion 60, for example, in Fig. 2, the distance from the end of the absorbent body 12 on the left side to the outer end of the leg-surrounding portion 60 on the left side. The side portion S is provided in the diaper 1, and the side portion Sm of the portion (fold line mm) located in the crotch portion is provided more than the ventral upper end portion 12f and the back side upper end portion 12b side portions Sf, Sb. long. Generally, the side portion S is more rigid and lower than the absorbent body 12. That is, the shorter the side portion S is, the less susceptible it is to the influence of the elastic member, and the longer the length of the side portion S, the more susceptible it is to the elastic member.

In the diaper 1 in the natural state and the wearing state, since the side portions Sf, Sb in the ventral upper end portion 12f and the back side upper end portion 12b are short, even if the leg-surrounding elastic member 61 is contracted, the rigidity of the absorbent body 12 is obtained. Strong, so it is not easy to pull up. On the other hand, since the side portion Sm in the portion located in the crotch portion is long, if the leg-surrounding elastic member 61 is contracted, it is easy to pull the side portion Sm toward the upper side. Therefore, it is easy to attach the leg circumference opening LH of the leg extension portion 60, the leakage preventing wall portion 50, and the like provided in the side portion Sm to the leg circumference of the infant. In particular, in the diaper 1, the portion in which the length of the absorbent body 12 in the left-right direction is the shortest is provided on the abdominal side, and the longest portion of the side portion S that is pulled upward is provided on the abdominal side. Therefore, with the leg-surrounding elastic member 61, the ventral side of the disposable diaper 1, especially the leg-opening portion LH, is easily pulled up toward the upper side, and the leg-opening LH is easily directed toward the front side, and is easily attached to the foot of the infant.

=== OTHER EMBODIMENT === The above embodiments of the present invention have been described above, but the above-described embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the present invention. It is to be understood that the invention may be modified or modified without departing from the spirit and scope of the invention. For example, there may be such a deformation as shown below.

In the above-described embodiment, the disposable diaper 1 having the abdominal waist portion 20, the back waist portion 30, and the absorbent body 10 is described in the above-described disposable diaper 1, but is not limited thereto. this. For example, the outer sheet 14 may be connected to a diaper (so-called two-member type) in which the front waist portion 20 and the rear waist portion 30 are integrated.

Further, in the above-described embodiment, as shown in FIG. 2, the welded region 62 is formed over the entire length in the longitudinal direction of the absorbent body 10, but is not limited thereto. At least one welding area 62 is disposed at least in the front lower side portion FU of the leg circumference extending portion 60, and the leg circumference opening LH is easily opened toward the front. However, since a plurality of welded regions 62 are provided in the front lower side portion FU, or the welded region 62 is provided in the front lower side portion FU and the rear lower side portion BU, or is provided along the entire length of the leg circumference extending portion 60, or The entire length of the absorbent body 10 in the longitudinal direction is provided with the welded region 62, and the rigidity of the leg-surrounding portion 60 is increased. Therefore, it is easy to maintain the shape in which the leg-opening LH is opened forward.

Further, in the above-described embodiment, the welding portion 62 is formed in three layers to form the leg circumference extending portion 60, but this is not limited thereto. For example, it is not necessary to fix the leg-surrounding member 15 to the exterior sheet 14 in a folded state, and it is also possible to provide a total of two layers of the welding region of the one-legged leg member and the one-layer outer sheet 14 . Further, it is not necessary to fold the outer sheet 14 of the fixed leg surrounding member 15 toward the inner side in the left-right direction.

In the above-described embodiment, the welded regions 62 that overlap the waist elastic members 22 and 32 in the front-rear direction are not limited thereto. Even when there is no welded region 62 which is repeated in the front-rear direction with the waist elastic members 22, 32, the welded region 62 is provided at least in the front lower side portion FU, so that the leg-opening LH can be easily opened toward the front side. However, since the influence of the contraction of the waist elastic members 22 and 32 in the left-right direction is further reduced, it is more preferable that the waist elastic members 22 and 32 and the welded region 62 are overlapped in the front-rear direction.

Moreover, in the above-described embodiment, the length L20 in the left-right direction of the discontinuous portion of the abdominal waist portion 20 is shorter than the length L30 in the left-right direction of the discontinuous portion of the back waist portion 30, and is not limited thereto. It is not necessary to provide a discontinuous portion of the waist elastic members 22, 32. Further, it is not necessary to make the length L20 of the discontinuous portion of the abdominal waist portion 20 in the left-right direction shorter than the length L30 of the discontinuous portion of the back waist portion 30 in the left-right direction. However, the length L20 of the discontinuous portion of the abdominal waist portion 20 in the left-right direction is shorter than the length L30 of the discontinuous portion of the back waist portion 30 in the left-right direction, and the leg-opening portion LH can be made easier. Open to the front side.

1‧‧‧ diapers (short-type absorbent articles)

10‧‧‧Absorbable ontology

10f‧‧‧ ventral upper end

10b‧‧‧Back side of the back side

11‧‧‧Top sheet

12‧‧‧ absorber

121‧‧‧Absorbent core

122‧‧‧ core cladding

13‧‧‧ Back sheet

14‧‧‧Outer sheet (sheet member)

15‧‧‧ leg members

20‧‧‧ Ventral waist circumference (waist circumference)

21‧‧‧Sheet

22‧‧‧Waist elastic members

30‧‧‧Back side waist (waist)

31‧‧‧Sheet

32‧‧‧Waist elastic members

50‧‧‧Leakproof wall

51‧‧‧Leak-proof wall elastic members

52‧‧‧End joint

53‧‧‧ Side joint

60‧‧‧ leg circumference extension

60a‧‧‧ leg opening formation

60b‧‧‧Repeat

61‧‧‧ leg elastic members

62‧‧‧welding area

69‧‧‧welding department

LH‧‧‧ leg opening

BH‧‧‧ Waist opening

Fig. 1 is a schematic perspective view of a disposable disposable diaper 1 for a pants type. Fig. 2 is a schematic plan view of the diaper 1 in an expanded state and in an extended state as seen from the side surface side of the skin. Fig. 3 is a schematic cross-sectional view taken along the line A-A in Fig. 2 . 4A is a view for explaining a method of forming the absorbent body 10. Fig. 4B is a schematic cross-sectional view taken along the line B-B in Fig. 4A. Fig. 5 is a view for explaining the ventral side of the diaper 1 in an enlarged state and in an extended state. Fig. 6A is a view showing the diaper 1 in an extended state and in an unfolded state. Fig. 6B is a view showing the diaper 1 in a natural state and in an unfolded state. Fig. 7 is a schematic view showing the principle of the leg-opening portion LH of the diaper 1. Figure 8 is an enlarged view of the welded region 62 in the portion Y of Figure 5.

Claims (10)

A pants-type absorbent article comprising: an up-and-down direction, a left-right direction, and a front-rear direction orthogonal to the up-and-down direction and the left-right direction, and an absorbent main body and a pair of waist portions, wherein the absorbent body is provided An absorbent member; a leg-surrounding member comprising: a leg-surrounding member that expands and contracts in the vertical direction, and a pair of leg-opening portions; and a sheet member positioned on a non-skin side of the absorbent body, the pair of The waist portion includes a waist elastic member that expands and contracts in the left-right direction, and the upper end portion of the absorbent body and the upper end portion of the back side are opposed to each other, and the upper end portion of the front side and the upper end portion of the back side are respectively paired with the pair a shorts-type absorbent article in which the waist portion is overlapped, wherein the end portion of the sheet member in the left-right direction has a plurality of welded regions in which the sheet member and the leg member are welded, and the welded region is in the left and right Direction has a predetermined length, with the position in front In the wearing state of the pants-type absorbent article, the front side of the leg-opening portion is located on the lower front side portion, and at least one of the front lower-side portions is provided to extend the leg-holding member. The end portion of the welded portion on the side of the leg-opening portion is inclined to the upper side from the end on the side of the absorbent body. The pants-type absorbent article according to claim 1, wherein a plurality of the welded regions are provided between the front end portion of the front side and the upper end portion of the back side along the leg opening portion. The pants-type absorbent article according to the first aspect of the invention, wherein the pants-type absorbent article is placed on the rear side of the leg-opening portion in the wearing state of the pants-type absorbent article and is located on the lower side. In a state in which the leg member is extended, the end of the leg-opening portion in which at least one of the welded regions is provided on the lower rear side portion is inclined downward from the end on the side of the absorber. The aforementioned welding area. The pants-type absorbent article according to any one of claims 1 to 3, wherein the plurality of the welded regions have the welded regions that are overlapped with the waist elastic members in the front-rear direction. The pants-type absorbent article according to claim 4, wherein the pair of waist portions are a front waist portion and a back waist portion, and the pair of waist portions are in the front-rear direction Each of the portions where the absorber overlaps has a discontinuous portion of the waist elastic member, and a length of the discontinuous portion of the waist elastic member in the left-right direction is longer than a length of the waist elastic member of the back waist portion. The length of the discontinuous portion in the aforementioned left-right direction is shorter. The pants-type absorbent article according to any one of claims 1 to 5, wherein the plurality of leg-hole elastic members are provided to be contracted to reduce the leg-opening portions, and the leg-surrounding members are in the left and right sides. The direction includes: an inner leg-surrounding elastic member provided on a side of the absorbent body, and an outer leg-surrounding elastic member provided on a side of the leg-opening portion, and tensioning the outer leg-surrounding elastic member only by a unit length The tension when the inner leg elastic member is extended by only a unit length is smaller. The pants-type absorbent article according to any one of claims 1 to 6, wherein the distance between the welded regions adjacent to each other in the vertical direction is larger than the distance between the welded regions in a state in which the leg members are extended. The length in the left-right direction is shorter. The pants-type absorbent article according to any one of the first aspect of the invention, wherein the leg-elastic member is provided in plurality, and the leg-holding member is stretched in the front-rear direction. In the leg-surrounding elastic members in the region overlapping the welding region, the welding regions adjacent to each other in the vertical direction are spaced apart from each other by the longest interval between the leg-reinforcing members adjacent to each other in the left-right direction. . The pants-type absorbent article according to any one of claims 1 to 8, wherein the welding region has a plurality of welded portions, and the plurality of welded portions are disposed at a predetermined interval. The pants-type absorbent article according to any one of the first aspect of the present invention, wherein the length ratio of the absorbent body in the left-right direction in the crotch portion is the upper end portion of the front side and the upper end portion of the back side. The length of the absorbent body which is repeated in the front-rear direction in the left-right direction is shorter.