JP2003024381A - Throw-away diaper of pants type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throw-away diaper of a pants type which prevents a tear line from running to a girth direction and enables a user to tear a sheet with approximately the specified force to a longitudinal direction in tearing the sheet in girth side sections. SOLUTION: The throw-away diaper 1A of the pants type comprises a hot meltable and liquid permeable front surface sheet 2, a hot meltable and liquid impermeable rear surface sheet 3 and a liquid absorptive panel 4 interposed between these sheets 2 and 3, in which the girth side sections 9 of these sheets 2 and 3 are fastened through the hot melt segments 10. The hot melt segments 10 extend zigzag in the longitudinal direction between a girth opening 11 and openings 12 around the legs so as to draw a substantially truncated chevron shape to the girth direction and are trisected on one side delineating the truncated chevron shape. In the girth side sections 9, the ends 14a and 15a of elastic member 14 and 15 exist in the spacings formed between the inner and outer ends of the girth direction of the hot melt sections 10 and at the top of the truncated chevron shape.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a disposable diaper that absorbs and retains excrement.

[0002]

2. Description of the Prior Art Japanese Utility Model Laid-Open No. 7-34814 discloses a heat-fusible and liquid-permeable surface sheet located on the skin contact side, and a heat-fusible and liquid-impermeable surface sheet located on the skin non-contact side. Front back and back waist regions, and a crotch region located between these waist back regions, which are made up of a liquid-absorbent panel interposed between the front and back sheets and are opposed to each other. The front and back sheets, which extend longitudinally in the front and rear waist regions, have their waist-side portions overlapping each other in a palm shape, and the waist-side portions are fixed to each other through a heat-sealing portion aligned in the vertical direction. Discloses a pants-type disposable diaper having a pair of leg openings formed therein.

At the upper part in the vertical direction and the lower part in the vertical direction of the side parts around the waist, the heat-sealed parts extend substantially horizontally in the waist direction, and
They are lined up in the longitudinal direction at given intervals. At the central portion in the vertical direction of the side portion around the waist, the heat-sealing portion extends in a zigzag shape in the vertical direction so as to draw a V-shape in the waist circumferential direction. A waist elastic member that extends in the waist direction is attached to the peripheral edge of the waist opening in a stretched state. A leg elastic member extending in the leg direction is attached to the peripheral edge of the leg opening in a stretched state.

In this diaper, since the waist circumference side portion is fixed to the longitudinal center portion through the V-shaped heat-sealing portion, when the worn diaper is taken off, the front and back sheets are heat-sealed. It has an effect that it can be torn obliquely downward along the periphery of the attachment portion, the front and back sheets are not torn in the waist circumference direction, and the tearing operation is easy.

[0005]

SUMMARY OF THE INVENTION In the diaper disclosed in the above publication, the pattern of the heat-sealing portion is different between the vertical upper and lower portions of the waist circumference side portion and the vertical central portion, so that the upper and lower portions and the central portion of the diaper are different. The front and back sheets have different tear strengths, and the front and back sheets cannot be torn in the longitudinal direction with a substantially constant force. Further, in this diaper, since the heat-sealing portions formed on the upper and lower portions in the vertical direction of the waist circumference side extend substantially horizontally in the waist circumference direction, when tearing the front and back sheets at the waist circumference side, tearing is performed. The line may run around the waist. In order to avoid them, it is sufficient to form a V-shaped thermal fusion bonding portion in the waist circumference direction at the upper and lower portions of the waist circumference side portion in the vertical direction similar to the longitudinal center portion of the waist circumference side portion.

[0006] However, when the heat-sealing portions that define a V-shape are formed in the vertical upper and lower portions of the waist-surrounding side portion, the waist-surrounding elastic member and the leg-surrounding elastic member extending to the waist-surrounding side portion by the heat-sealing portion. Both ends of and may be cut. The waist elastic member and the leg elastic member are generally fixed at both ends to the waist side portions of the front and back sheets,
When both ends of the waist elastic member and the leg elastic member are cut off, the elastic members on the waist side are easily released from the sticking when the diaper is worn, and the waist elastic member moves in the waist direction. In some cases, the elastic member for leg circumference may contract inward, or the elastic member for leg circumference may contract inward in the direction around the leg, and the elongation stress of these elastic members decreases. In a diaper in which the stretching stress of the elastic members is reduced, the tightening of the wearer's body around the waist and legs becomes insufficient, and the diaper falls and the excrement leaks.

An object of the present invention is to tear a sheet at a side portion of the waistline without tearing lines running in the waistline direction and to tear the sheet in the longitudinal direction with a substantially constant force. It is an object of the present invention to provide a pants-type disposable diaper in which the heat-sealing portion extending to the portion does not cut both ends of the waist elastic member and the leg elastic member.

[0008]

Means for Solving the Problems The premise of the present invention for solving the above problems is to provide a heat-fusible sheet defining front and rear waist regions facing each other and a crotch region located between these waist regions. And a liquid-absorbent panel extending from the crotch region toward the front and rear waist regions, the sheet,
A waist portion that is located outside both end edges of the panel and extends in the front and rear waist area in the waist direction, and a waist portion that is positioned outside both side edges of the panel and extends in the front and rear waist area in the vertical direction. Pants having a lateral side portion, the lateral side portion of the seat being fixed via the heat-sealing portions aligned in the longitudinal direction, and having a waist opening and a pair of leg openings below the waist opening. It is a type of disposable diaper.

The features of the present invention based on the above premise are as follows.
Zigzag extending in the longitudinal direction between the waist opening and the leg openings so that the heat-sealed portion substantially forms a V shape in the waist direction, and The sheet is divided into at least two sides on one side that defines the shape of, and at the waist side portion of the sheet, the heat-sealing portion has an inner end in the waist direction and an outer end in the waist direction that are adjacent to each other in the waist direction. There is a given gap in the vertical direction, and a gap is formed in the vertical direction between the inner and outer ends of the heat-sealing portion in the girth direction and the top of the C-shape.

The present invention has the following embodiments. (1) A plurality of waist elastic members extending in the waist direction are attached to the waist end of the seat in a stretched state, and a plurality of leg elastics extending in the leg direction through the leg openings. A member is attached to the peripheral portion of the leg-surrounding opening in a stretched state, and both ends of the waist-surrounding elastic member and the leg-surrounding elastic member that extend to the waist-surrounding side portion of the seat,
It is located in the gap. (2) At least one auxiliary elastic member extending in the waistline direction between the waistline elastic member and the leg openings is extended in at least one of the front and rear waistband regions of the seat. Both ends of the auxiliary elastic member attached and extending to the side of the seat around the waist are located in the gap. (3) The heat-sealing portions that are adjacent to each other in the waist-circumferential direction are separated from each other in the longitudinal direction by a given dimension, and the outer-circumferential direction outer end and the inner-circumferential-direction inner end of the heat-sealing portion are the heat-melting portions. It is located on an imaginary vertical line extending in the vertical direction between the inner and outer ends of the wearing portion in the girth direction. (4) The angle formed by the phantom horizontal line extending in the girth direction on the girth side of the sheet and the heat-sealing part is 10 to 3
It is in the range of 0 °. (5) The length dimension of one side that defines the C-shape is 5 to 20 mm, and the length dimension of one of the heat-sealing portions is 1 to 5 mm. The longitudinal length of the gap is in the range of 0.3 to 1 mm. (6) The heat-fusible sheet is formed from a liquid-permeable front sheet located on the skin contact side and a liquid-impermeable back sheet located on the skin non-contact side, and the liquid-absorbent panel is , Is interposed between the top sheet and the back sheet.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the pants-type disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

1 and 2 are a partially cutaway perspective view of a diaper 1A and an enlarged partial perspective view of a waist circumference side portion 9, respectively.
FIG. 3 is an end view taken along line I-I of FIG. 1. In FIG. 1, the waist circumference direction is indicated by an arrow X, the vertical direction is indicated by an arrow Y, and the leg circumference direction is indicated by an arrow Z. The inner surfaces of the topsheet 2 and the backsheet 3 are surfaces facing the panel 4, and the outer surfaces of the sheets 2 and 3 are surfaces not facing the panel 4.

The diaper 1A comprises a heat-sealable and liquid-permeable topsheet 2 located on the skin contact side and a heat-sealable and liquid-impermeable backsheet 3 located on the skin non-contact side. , And a liquid-absorbent panel 4 interposed between the sheets 2 and 3. The diaper 1A has a front waist region 5 and a rear waist region 7 facing each other, and a crotch region 6 located between the waist regions 5 and 7.

The topsheet 2 and the backsheet 3 are located on the outer side of both end edges 4a of the panel 4 and extend around the front and rear waist regions 5, 7 in the waistline direction. It has a waist circumference side portion 9 which is located outside of 4b and extends longitudinally in the front and rear waist circumference regions 5 and 7.

In the diaper 1A, the waist circumference side portions 9 of the front and back sheets 2, 3 are overlapped in a palm shape, and the waist circumference side portions 9 are fixed to each other through the heat-sealing portions 10 arranged in the longitudinal direction. The diaper 1A has a waist opening 11 and a pair of leg openings 12 below the waist opening 11.

A plurality of waist elastic members 14 extending in the waist direction are attached to the waist end 8 in a stretched state. A plurality of leg elastic members 15 extending in the leg direction are attached to the peripheral edge portion 13 of the leg opening 12 in an extended state. In the waist-surrounding side portion 9, both end portions 14a and 15a of the elastic members 14 and 15 located there are fixed to the inner surfaces of at least one of the front and back sheets 2 and 3. The elastic members 14 and 15 are intermittently fixed to the inner surfaces of at least one of the front and back sheets 2 and 3 in the remaining portion except the waist side portion 9.

At the waist-surrounding end portion 8, the waist-surrounding side portion 9, and the peripheral edge portion 13 of the leg-surrounding opening 12, the top sheet 2 and the back sheet 3 are formed.
The inner surfaces of and are fixed. The panel 4 extends from the crotch region 6 toward the front and rear waist regions 5, 7. The panel 4 is bonded to the inner surface of at least one of the topsheet 2 and the backsheet 3. A hot melt adhesive (not shown) is used for fixing the front and back sheets 2 and 3, fixing the elastic members 14 and 15 to the front and back sheets 2 and 3 and joining the panel 4.

As shown in FIG. 2, the heat-sealing portion 10 extends vertically between the waist-opening 11 and the leg-opening 12 so as to form a substantially V shape in the waist-circumferential direction. It extends in a zigzag manner. The heat-sealing portion 10 is divided into three on one side that defines a C-shape, and the heat-sealing portions 10 are arranged in the vertical direction with a given distance therebetween. The heat-sealing portions 10 extend obliquely in the waistline direction and have a given length L in the waistline direction.
Have two.

In the heat-sealing portions 10 which are adjacent to each other in the waist circumference direction,
The inner circumference direction inner end 10a and the outer circumference direction outer end 10b of the heat-sealed portions 10 are separated from each other in the longitudinal direction by a given dimension. Inner end 10a of the heat-sealing portion 10 in the girth direction and outer end 10 in the girth direction
A vertical gap 16 is formed between b and b. At the top of the C-shape, the inner ends 10a of the heat-sealing portion 10 in the body-circumferential direction are separated from each other in the vertical direction by a given dimension. A vertical gap 17 is formed at the top of the C-shape. In the heat-sealing portion 10, the inner circumference direction inner end 10a and the outer circumference direction outer end 10b of the heat fusion bonding portion 10 are arranged in the waist circumference direction inner and outer ends 10a, 10
It is located on an imaginary vertical line S1 extending in the vertical direction between b.

The waist side portion 9 has a waist elastic member 14
Both ends 14a, 15a of the elastic member 15 for legs and legs extend, and both ends 14a, 15a of the elastic members 14, 15 extend.
Are located in the gaps 16 and 17. On the waist side 9
Both ends 14 of the heat-sealing portion 10 and the elastic members 14 and 15
The heat-sealing portion 10 does not cut the both ends 14a, 15a of the elastic members 14, 15 from each other. Therefore, in the diaper 1A, the fixation of the waistline elastic member 14 on the waistline side portion 9 is not released, and the waistline elastic member 14 does not contract inward in the waistline direction. Further, in the diaper 1A, the sticking of the elastic member 15 for leg circumference on the waist circumference side portion 9 is not released, and the elastic member 15 for leg circumference does not contract inward in the leg circumference direction. In the diaper 1A, those elastic members 1
The extension stresses of the belts 4 and 15 do not decrease, and the waist elastic member 14 and the leg elastic member 15 can sufficiently tighten the wearer's waist and legs.

In the diaper 1A, since the waist-surrounding side portions 9 of the front and back sheets 2 and 3 are fixed to each other via the heat-sealing portions 10 that extend intermittently, the heat-sealing portions 10 may extend continuously. By comparison, it is possible to reduce the fixed area on the waist side portion 9. Since the heat-sealing portion 10 extends in the longitudinal direction in a constant pattern on the waist circumference side portion 9, the tear strength of the entire waist circumference side portion 10 can be made substantially uniform. The back sheets 2 and 3 can be torn with a substantially constant force.

In the diaper 1A, the front and back sheets 2, 3 are torn in the longitudinal direction at the waist circumference portion 9 so that the soiled diaper 1A can be easily removed from the wearer. In the diaper 1A, the front and back sheets 2 and 3 are torn obliquely downward along the peripheral edge of the heat-sealing portion 10 that draws a V-shape in the girth direction.

In the diaper 1A, the inner circumference direction inner end 10a and the outer circumference direction outer end 10b of the heat-sealing portion 10 are imaginary vertical lines S.
Since the tear line is located above 1, the tear line is likely to be connected to the outer circumferential direction inner end 10b of the heat-sealing portion 10 from the waist-circumferential direction inner end 10a, and the tear line is interrupted between the heat-sealing portions 10. There is no.

In the diaper 1A, the angle θ formed by the phantom horizontal line S2 extending in the waist-surrounding direction on the waist-side portion 9 and the heat-sealed portion 10 is in the range of 10 to 30 °. When the angle θ is less than 10 °, the tear line may run in the waistline direction when tearing the front and back sheets 2 and 3.

In the diaper 1A, the length dimension L1 in the girth direction of one side that defines the C-shape is in the range of 5 to 20 mm, and the length dimension L2 of one of the heat-sealing portions 10 in the girth direction is It is in the range of 1 to 5 mm. In the case where the length dimension L1 exceeds 20 mm and the length dimension L2 exceeds 5 mm, an excessive heat fusion portion 10 is formed on the waist circumference side portion 9 and when the front and back sheets 2 and 3 are torn. , Strong force must be applied and the tearing operation cannot be performed smoothly.
When the length dimension L1 is less than 5 mm and the length dimension L2 is less than 1 mm, the diaper 1 depends on the peel strength of the heat-sealed portion 10.
When A is worn, the front and back sheets 2 and 3 are heat-sealed parts 1
At 0, it may peel off.

In the diaper 1A, the longitudinal length L3 of the gaps 16 and 17 is in the range of 0.3 to 1 mm. If the length dimension L3 is less than 0.3 mm, it is difficult to position both end portions 14a, 15a of the elastic members 14, 15 in the gaps 16, 17, and both end portions 14a, 1 of the elastic members 14, 15 are difficult to locate.
5a and the heat-sealing portion 10 may easily cross each other, and the heat-sealing portion 10 may cut the both ends 14a and 15a of the elastic members 14 and 15.

FIG. 4 is a partial perspective view similar to FIG. 2, showing a pattern of the heat-sealing portion 10 different from that of FIG. The heat-sealing portion 10 is divided into three at one side that defines a V-shape. The heat-sealing portions 10 extend obliquely in the waistline direction and are arranged in a line in the waistline direction. In the heat-sealing portions 10 that are adjacent to each other in the waistline direction, an inner edge 10a in the waistline direction and an outer end 10b in the waistline direction of the heat-sealing portions 10 are imaginary vertical lines S.
The upper end 10a is not located on the upper side 1 and the inner end 10a in the waistline direction and the outer end 10b in the waistline direction are separated from each other in the longitudinal direction and the waistline direction by a given dimension. A gap 1 formed in the longitudinal direction between the inner circumference direction inner end 10a and the outer circumference direction outer end 10b of the heat-sealing portion 10.
6 is formed. A vertical gap 17 is formed at the top of the C-shape. At the waist circumference side portion 9, both end portions 1 of the waist circumference elastic member 14 and the leg circumference elastic member 15 are provided.
4a and 15a are located in the gaps 16 and 17.

The angle θ formed by the heat-sealing portion 10 and the imaginary horizontal line S2 and the length dimension L of one side defining the V-shape in the body circumference direction.
1, the length dimension L2 of one line of the heat-sealing portion 10 in the body circumference direction,
The longitudinal length dimension L3 of the gaps 16 and 17 is the same as that of FIG.

5 and 6 are a partially cutaway perspective view of a diaper 1B showing another embodiment and an enlarged partial perspective view of the waist circumference side portion, and FIG. 7 is II- of FIG. It is a II line end view. In FIG. 5, the waistline direction is indicated by arrow X, the vertical direction is indicated by arrow Y, and the leg direction is indicated by arrow Z. This diaper 1B
Is different from that of FIG. 1 in the following points.

In the front and rear waist regions 5, 7 of the diaper 1B, a plurality of auxiliary elastic members 18 extending in the waist direction are attached in a stretched state. The auxiliary elastic members 18 are arranged in the longitudinal direction between the waist elastic members 14 and the leg openings 12 with a predetermined distance therebetween.

At the waist side portion 9, both end portions 18a of the auxiliary elastic member 18 located there are fixed to the inner surfaces of at least one of the front and back sheets 2, 3. The auxiliary elastic member 18 is intermittently fixed to the inner surface of at least one of the front and back sheets 2 and 3 in the remaining portion except the waist side portion 9. The auxiliary elastic member 18 that crosses the panel 4 in the waistline direction is intermittently fixed to the inner surface of the backsheet 3. A hot melt adhesive (not shown) is used to fix the auxiliary elastic member 18 to the front and back sheets 2 and 3.

In the diaper 1 B, both end portions 18 a of the auxiliary elastic member 18 extend to the waist circumference side portion 9, and both end portions 18 a of the auxiliary elastic member 18 are located in the gap 17. In the diaper 1B, since the heat-sealing portion 10 does not cut the both end portions 18a of the auxiliary elastic member 18, the fixation of the auxiliary elastic member 18 on the waist side portion 9 is not released, and the auxiliary elastic member 18 is not released. Does not contract inward around the waist. In the diaper 1B, the extension stress of the auxiliary elastic member 18a does not decrease.

The angle .theta. Formed by the heat-sealing portion 10 and the virtual horizontal line S2 and the length dimension L of one side defining the V-shape in the body circumference direction.
1, the length dimension L2 of one line of the heat-sealing portion 10 in the body circumference direction,
The longitudinal length dimension L3 of the gaps 16 and 17 is the same as that of FIG.

Front and back sheets 2, 3 and their elastic members 1
For fixing to 4, 15, 18 with a hot-melt type adhesive, a pattern in which the adhesive is applied in a spiral shape or a spray shape can be appropriately selected. However, the elastic member 1
In order to surely fix 4, 5, 18 to the front and back sheets 2, 3, the coating area ratio of the adhesive with respect to the total surface area of the elastic members 14, 15, 18 is preferably in the range of 20 to 80%. . If the coating area ratio of the adhesive is less than 20%, the elastic members 14, 15, 18 may come off the front and back sheets 2, 3. When the coating area ratio of the adhesive exceeds 80%, the adhesive prevents the elastic members 14, 15, 18 from contracting.

As the surface sheet 2, a hydrophilic non-woven fabric or a thermoplastic film having a large number of fine holes can be used. The back sheet 3 includes a hydrophobic fiber nonwoven fabric, a breathable liquid-impermeable thermoplastic film, a composite nonwoven fabric obtained by stacking hydrophobic fiber nonwoven fabrics, a hydrophobic fiber nonwoven fabric and a breathable liquid-impermeable thermoplastic film. Any of the laminated composite sheets can be used.

For the back sheet 3, a composite non-woven fabric in which a fibrous non-woven fabric having a high water resistance and made by a melt blown method is sandwiched between fibrous non-woven fabrics having a high strength and a high flexibility can be used.

As the non-woven fabric, a non-woven fabric manufactured by a spun lace, needle punch, melt blown, thermal bond, spun pond, chemical bond or air through method can be used. As the constituent fibers of the non-woven fabric, polyolefin-based fibers, polyester-based fibers, polyamide-based fibers, core / sheath composite fibers or side-by-side composite fibers made of polyethylene / polypropylene or polyester can be used.

The panel 4 is a mixture of fluff pulp and superabsorbent polymer particles or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and is compressed to a required thickness. It is preferable that the entire panel 4 is covered and joined to a tissue paper in order to prevent the panel 4 from losing its shape and the polymer particles from falling off. As the polymer particles, starch-based, cellulose-based, and synthetic polymer-based particles can be used.

In the diapers 1A and 1B, the heat fusion portion 1
0 may be divided into two on one side that defines a C-shape, and the heat-sealing portion 10 may be divided into four or more on one side that defines a C-shape.

In these diapers 1A and 1B, the top sheet 2 may be formed of a hydrophilic fibrous nonwoven fabric having elasticity and the back sheet 3 may be formed of a hydrophobic fibrous nonwoven fabric having elasticity. When the sheets are formed of a nonwoven fabric having elastic elasticity, the waist elastic member 14, the leg elastic member 15, and the auxiliary elastic member 1
8 can be omitted.

[0041]

According to the pants-type disposable diaper of the present invention, since the side portions around the waist of the sheet are fixed via the intermittent heat fusion portions, the heat fusion portions are continuous. It is possible to reduce the area of fixation at the side portions around the waist as compared with the case where the body extends. On the waist side of the seat, the heat-sealing part extends in a constant pattern in the longitudinal direction so as to form a substantially V-shape in the waist direction, so that the tear strength of the entire waist side is increased. Can be made substantially uniform, and the sheet can be torn at the side portion around the waist with a substantially constant force. Further, in this diaper, the sheet is not torn obliquely downward along the peripheral edge of the heat-sealed portion, and the tear line does not run in the waistline direction.

In the diaper in which the waist elastic members are attached to the waist ends and the leg elastic members are attached to the peripheral edge of the leg openings, both ends of the elastic members located on the waist side of the seat are The parts are located in the gap, and the heat-sealing part does not cut both ends of the elastic members. In this diaper, the waist elastic members do not contract inward in the waist direction, and the leg elastic members do not contract inward in the leg direction, so the elongation stress of the elastic members decreases. There is no such thing. In this diaper, the waist circumference elastic member and the leg circumference elastic member allow the wearer's waist circumference and leg circumference to be sufficiently tightened, and the diaper does not slip down and excrement does not leak. .

In the diaper to which the auxiliary elastic member is attached, both ends of the auxiliary elastic member located on the waist circumference side of the sheet are located in the gap, and the heat-sealing portion cuts both ends of the auxiliary elastic member. Since the auxiliary elastic member does not contract inward in the waist circumference direction, the extension stress of the auxiliary elastic member does not decrease.

In a diaper in which the outer edge in the girth direction and the inner edge in the girth direction of the heat-sealed portion are located on an imaginary vertical line, the tear line is from the inner end in the girth direction to the outer side in the girth direction. It is easy to connect to the edges and the tear lines do not break between the heat seals.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a diaper.

FIG. 2 is a partial perspective view of a side portion around the waist in an enlarged manner.

3 is an end view taken along line I-I of FIG.

FIG. 4 is a view showing a pattern of a heat-sealing portion different from that in FIG.
FIG.

FIG. 5 is a partially cutaway perspective view of a diaper showing another embodiment.

FIG. 6 is an enlarged partial perspective view of the waist circumference side portion.

7 is an end view taken along line II-II of FIG.

[Explanation of symbols]

1 Pants-type disposable diaper 2 Liquid-permeable surface sheet (heat-fusible sheet) 3 Liquid-impermeable back sheet (heat-fusible sheet) 4 Liquid absorbing panel 4a Both edges 4b Both edges 5 Front waist area 6 inseam 7 Rear waist area 8 waist circumference 9 waist circumference side 10 Thermal fusion part 10a Inner end around the waist 10b Outer end in the girth direction 11 waist opening 12 Leg openings 13 Edge 14 Elastic member for waist circumference 14a both ends 15 Leg elastic members 15a both ends 16 gap 17 Gap 18 Auxiliary elastic member 18a both ends L1 length dimension L2 length dimension L3 length dimension S1 virtual vertical line S2 virtual horizon θ angle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takaaki Shimada             1531-7 Wadahama Takasuka, Toyohama Town, Mitoyo District, Kagawa Prefecture               Unicharm Corporation Technical Sen             Inside F term (reference) 3B029 BD09 BD10 BD13 BD21                 4C098 AA09 CC07 CC14 CC27 DD10                       DD12 DD23 DD24 DD25 DD26                       DD28 DD30

Claims (7)

[Claims] 1. A heat-fusible sheet that defines front and rear waist regions that face each other and a crotch region that is located between the waist regions, and a liquid absorbent that extends from the crotch region toward the front and rear waist regions. A flexible panel, wherein the sheet is located outside both end edges of the panel and extends around the front and rear waist regions in the waist-surrounding direction, and outside the side edges of the panel. A waist peripheral side portion that extends in the longitudinal direction in the front and rear waist peripheral regions, and the waist peripheral side portion of the sheet is fixed via heat fusion portions arranged in the longitudinal direction, and the waist peripheral opening and the lower portion thereof are provided. A pants-type disposable diaper having a pair of leg openings formed therein, wherein the heat-sealing portion substantially draws a V-shape in the girth direction, and the girth opening and the legs are formed. Zigzag in the longitudinal direction between the surrounding opening, and, It is divided into at least two parts on one side that defines the shape of, and at the waist circumference side portion of the sheet, there are a waist circumference inner end and a waist circumference outer end of the heat-sealing portions that are adjacent to each other in the waist circumference direction. The longitudinally spaced apart by a predetermined dimension, a gap is formed in the longitudinal direction between the inner and outer ends of the heat-sealing portion in the girth direction and the top of the C-shape. Diapers. 2. A plurality of leg peripheries extending in the girth direction are attached to the waist end of the seat in a stretched state, and a plurality of leg peripheries extending in the leg girth direction. Elastic members for legs are attached in a stretched state to the peripheral portion of the leg-opening, and both ends of the elastic members for leg and the leg elastic members that extend to the side portions of the seat around the body are located in the gap. The diaper according to claim 1, which is located. 3. The at least one auxiliary elastic member extending in the waistline direction between the waistline elastic member and the leg openings extends to at least one of the front and rear waistlines of the seat. The diaper according to claim 1 or 2, wherein both ends of the auxiliary elastic member that are attached in a state and extend to the side of the seat around the waist are located in the gap. 4. The heat-sealing portions that are adjacent to each other in the waist-circumferential direction are separated from each other in the longitudinal direction by a predetermined dimension, and the outer-circumferential direction outer end and the inner-circumferential-direction inner end of the heat-welding portion are the The diaper according to any one of claims 1 to 3, which is located on an imaginary vertical line extending in the longitudinal direction between the inner and outer ends of the heat-sealing portion in the waistline direction. 5. An angle formed by an imaginary horizontal line extending in the girth direction on the girth side of the sheet and the heat-sealing part is:
The diaper according to any one of claims 1 to 4, which is in the range of 10 to 30 °. 6. The length dimension of one side defining the C-shape in the waist circumference direction is in the range of 5 to 20 mm, and the length dimension of one side of the heat-sealing portion in the waist circumference direction is 1 to 5 mm. The diaper according to any one of claims 1 to 5, wherein the range and the lengthwise length of the gap are in the range of 0.3 to 1 mm. 7. The heat-fusible sheet is formed from a liquid-permeable top sheet located on the skin contact side and a liquid-impermeable back sheet located on the skin non-contact side, The diaper according to any one of claims 1 to 6, wherein a panel is interposed between the top sheet and the back sheet.