JP2005027838A - Disposable pants-type diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable pants-type diaper which is excellent to fit to a crotch part and a circumference of the legs of a wearer and to follow the movement of the legs, and can effectively prevent leakage from the side. <P>SOLUTION: The diaper comprises an outer pants member 2 wherein leg hole sections S are formed at both sides of a crotch section R between a front abdominal section P and a back section Q and a main body 3 of an absorber which is disposed on the crotch section R of the outer pants member 2 and extends to the front and rear parts of the diaper. Also, the diaper is equipped with an elastic member 6 for a waist part which is attached in a stretched condition and elastic members 8A and 8B for the circumference of the legs which are attached in a stretched condition at least along a front edge part 2b and a rear edge part 2c of the leg holes section S in the outer pants member 2, wherein the two or more front elastic members 8A for the circumference of the legs of the front edge part 2b is set to have contractile force which becomes successively weaker from the front edge part 2b toward the elastic member 6 for the waist part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable pants-type diaper.
[0002]
[Prior art]
Conventionally, an exterior pant member having leg holes formed on both sides of the crotch between the front and back parts, and an absorbent main body joined to the crotch of the exterior pant member and extending in the front-rear direction of the diaper There is a disposable pants-type diaper.
[0003]
And the thing arrange | positioned so that the elastic member of an exterior pants member and the elastic member of an absorptive main body may continue around a leg hole part is proposed (for example, refer patent document 1).
[0004]
Moreover, what arrange | positioned so that the waist elastic member of an exterior pants member and the elastic member of an absorptive main body mutually cross | intersect is proposed (for example, refer patent document 2).
[0005]
[Patent Document 1]
JP-T-2001-522703
[Patent Document 2]
JP-A-7-299828
[0006]
[Problems to be solved by the invention]
However, in the techniques of Patent Documents 1 and 2, there is a problem in the fit between the wearer's crotch and legs, and there is also a problem in the followability to the movement of the legs, so side leakage cannot be effectively prevented. It was.
[0007]
The present invention has been made to solve the above-described problems, and is excellent in fitability around the wearer's crotch and legs, and is excellent in followability to leg movement, and can effectively prevent side leakage. An object of the present invention is to provide a disposable pants-type diaper.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is provided in an exterior pant member in which leg hole portions are formed on both sides of the crotch portion between the front abdomen and the back portion, and in the crotch portion of this exterior pant member, In disposable pants-type diapers consisting of an absorbent main body extending in the diaper front-rear direction,
An elastic member for waist is attached to the exterior pant member in an expanded state, and an elastic member for leg periphery is attached in an extended state along at least the front edge portion and the rear edge portion of the leg hole portion. The plurality of front leg elastic members at the front edge are set so that the contraction force gradually decreases from the front edge toward the waist elastic member. It provides diapers.
[0009]
According to a second aspect of the present invention, it is preferable that the plurality of front leg elastic members at the front edge portion are linearly extended in the diaper width direction.
[0010]
As in claim 3, the width of the crotch portion of the exterior pant member is set to be narrower than the width of the absorbent main body located in the crotch portion, and the absorbent main body extends outward from the crotch portion. It is preferable to have a configuration.
[0011]
According to a fourth aspect of the present invention, it is preferable that an extending elastic member is attached in the stretched state in the front-rear direction of the diaper near the edge in the width direction of the extending portion of the absorbent main body.
[0012]
According to a fifth aspect of the present invention, it is preferable that the diameter of the front leg elastic member is set to be thicker as it is closer to the front edge.
[0013]
According to a sixth aspect of the present invention, it is preferable that the distance between the elastic members for the front leg periphery is set to be narrower as it is closer to the front edge.
[0014]
As in claim 7, it is preferable that the absorbent main body is not joined to the exterior pant member at the portion where the absorbent main body overlaps the front leg elastic member.
[0015]
As described in claim 8, it is preferable that the elastic member for the front leg periphery is set so that the contraction force is not expressed at the portion of the absorbent main body that is applied to the liquid absorbent core.
[0016]
According to a ninth aspect of the present invention, it is preferable that the rear edge of the leg hole is formed in a shape that bulges outward.
[0017]
According to a tenth aspect of the present invention, the elastic member for the rear legs around the rear edge of the leg hole is set so that no contraction force is generated at a portion of the absorbent main body that is applied to the liquid absorbent core. It is preferable.
[0018]
According to a eleventh aspect, the absorbent main body includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between the two sheets. An extension part extending outward from both side edges of the liquid core and a three-dimensional part rising upward from the two side edges are provided, and the three-dimensional part is at least an outer side in the diaper width direction from the standing end part. It is preferable that a solid elastic member is attached in a stretched state in the front-rear direction of the diaper at the standing free end.
[0019]
According to a twelfth aspect of the present invention, the three-dimensional portion is folded back from the standing edge portion toward the outside in the diaper width direction, and the second solid portion is folded back from the upper edge of the first three-dimensional portion toward the inside. It is preferable that the middle point elastic member is attached to the upper edge of the first three-dimensional portion in a stretched state in the front-rear direction of the diaper.
[0020]
According to a thirteenth aspect of the present invention, the absorbent main body is preferably engaged with an exterior pant member.
[0021]
Operation and effect of the invention
According to the present invention, the front leg elastic member is set so that the contraction force gradually decreases from the front edge of the leg hole toward the waist elastic member. The leading edge located on both sides of the absorbent body is less likely to shrink, and the leading edge located on both sides of the absorbent body tends to shrink. Along with this, it becomes curved upward.
[0022]
Accordingly, the contraction force of the front leg elastic member acts to lift the absorbent main body, so that the absorbent main body can easily fit around the crotch and leg of the wearer, and the front leg elastic member can be Since it becomes easy to follow the movement of the leg, side leakage can be effectively prevented.
[0023]
Moreover, since the front edge part located in the both sides of an absorptive main body curves upwards by the difference in contraction force, a wearer's thigh pressure is reduced and a walk becomes easy.
[0024]
Furthermore, since the front edge is curved upward, the front and back of the pants-type diaper can be easily discriminated in relation to the rear edge that does not curve, so there is no risk of wearing the front and back incorrectly.
[0025]
According to the second aspect, since the elastic member for the front leg is extended linearly in the diaper width direction, the pant-type diaper is mainly manufactured in a lateral flow state in the diaper width direction. Conventionally, all of the elastic members had to be attached in a curved shape that is convex toward the crotch, but in particular, the elastic members for the front legs around the front edge of the leg hole are in the diaper width direction. Since it can be attached in a straight line, the manufacturing process can be simplified.
[0026]
According to the third aspect, since the width of the crotch portion of the exterior pant member is set to be narrower than the width of the absorbent main body, the absorbent main body is extended outward from the crotch portion. The feeling of fitting to the crotch becomes better.
[0027]
In addition, conventionally, the elastic members for the legs have to be attached in a curved shape that is convex toward the crotch, but when the width of the crotch is narrow in this way, it is attached in a sharp curve. However, the elastic members for the front legs around the front edge of the leg holes can be attached in a straight line in the diaper width direction. Installation is very easy.
[0028]
According to the fourth aspect, since the extending elastic member is attached to the extending portion of the absorbent main body, the fit of the wearer to the crotch portion becomes more excellent.
[0029]
Further, since the front leg elastic member, the rear leg elastic member, and the extending elastic member can surround the entire circumference of the wearer's leg, the side leakage prevention performance is further improved.
[0030]
According to the fifth aspect, when the diameter of the front leg elastic member is set to be thicker as it is closer to the front edge, a plurality of front leg elastic members are attached in a state where they are pulled at the same expansion ratio. Therefore, it is easy to set the contraction force to be weakened sequentially.
[0031]
According to the sixth aspect, when the interval between the front leg elastic members is set closer to the front edge portion, a plurality of front leg elastic members having the same thickness are simply attached while being pulled at the same expansion ratio. Since the contraction force can be changed, it becomes easy to set the contraction force to be weakened sequentially.
[0032]
According to the seventh aspect, since the absorbent main body is not joined to the exterior pants member at the portion where the absorbent main body overlaps the front leg elastic member, the front leg elastic member and the extending elastic member overlap each other. In this case, since the exterior pant member provided with the elastic member for the front leg periphery is easily displaced up and down, it is easy to follow the movement of the wearer's leg and the wear feeling is further improved.
[0033]
According to the eighth aspect of the present invention, since the elastic member for the front leg circumference is set so that the contraction force does not appear at the portion of the absorbent main body that is applied to the liquid absorbent core, the liquid absorption is performed by the contraction force of the front leg circumference elastic member. Since the sex core is not distorted, a more comfortable wearing feeling can be obtained.
[0034]
According to the ninth aspect, since the rear edge portion of the leg hole portion is formed in a shape that bulges outward, the wearer's rounded buttocks can be wrapped and softly fitted.
[0035]
According to the tenth aspect, since the elastic member for the rear leg around the leg hole is set so that the contraction force does not appear at the portion of the absorbent main body that is applied to the liquid absorbent core, the elastic member for the rear leg Since the absorbent core is not distorted by the contraction force, a more comfortable wearing feeling can be obtained.
[0036]
According to the eleventh aspect, since the three-dimensional part (rise flap) is provided in the absorbent main body, the side leakage prevention performance is improved. In addition, since the three-dimensional portion rises outward from the standing end portion in the diaper width direction, and the three-dimensional elastic member is attached to the standing free end portion, the three-dimensional portion may cover the surface of the top sheet. The effective absorption surface area can be secured widely.
[0037]
According to the twelfth aspect, the three-dimensional portion is formed by a first three-dimensional portion that is folded outward from the standing edge portion and a second three-dimensional portion that is folded inward from the upper edge of the first three-dimensional portion. Therefore, since the three-dimensional part can be made high while ensuring a wide effective absorption area, the side leakage prevention performance can be further improved. In addition, since the midpoint elastic member is attached to the upper edge of the first three-dimensional part, the second three-dimensional part rises firmly, so that the side leakage prevention performance can be further improved.
[0038]
According to the thirteenth aspect, since the absorbent main body is detachably locked to the exterior pant member, it is economical because only the absorbent main body can be replaced and the exterior pant member can be reused.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0040]
As shown in FIGS. 1 to 4 and FIG. 7A, the disposable pant-type diaper 1 basically includes an exterior pant member 2 and an absorbent main body 3.
[0041]
The exterior pant member 2 includes a skin surface side sheet 4 and an outer surface side sheet 5 in which leg holes S are formed on both sides of the crotch R between the front abdominal part P and the back part Q. The front abdominal part P and the back part Q are each extended in the diaper front-rear direction X from the skin surface side sheet 4, and each extension part is provided with a front folded part 5a and a rear folded part 5b folded inward. Forming.
[0042]
A plurality of waist elastic members 6 are sandwiched between the folded-back portions 5a and 5b corresponding to the waist portions of the front abdomen P and the back portion Q, with the front presser sheet 9 and the rear presser sheet 10 sandwiched therebetween. Are attached in a stretched state in the diaper width direction W and bonded with a hot melt adhesive or the like.
[0043]
Further, a plurality of back elastic members 7 are attached in a stretched state in the diaper width direction W between the skin surface side sheet 4 and the outer surface side sheet 5 corresponding to the back of the back portion Q.
[0044]
As shown in FIG. 2 (b), the front abdomen P and the back part Q of the exterior pant member 2 are formed in a rectangular shape long in the diaper width direction W, and the lower end of the front abdomen P is the diaper width. A straight front edge 2b of the leg hole S is formed by being formed in a straight line in the direction W.
[0045]
The center of the lower end of the front abdominal part P in the diaper width direction W is connected to the front part of the thin constricted crotch part R, and the entire lower part of the diaper width direction W of the back part Q is swollen outward. The rear part of the crotch part R is continuous, and the outer edge of the rear part of the crotch part R constitutes the bulging rear edge part 2c of the leg hole part S.
[0046]
And between the skin side sheet | seat 4 and the outer surface side sheet | seat 5 corresponded to the lower end of the front abdominal part P, ie, the front edge part 2b of the leg hole part S, along this front edge part 2b, the diaper width direction W A plurality of elastic members 8A around the front legs are attached in a stretched state.
[0047]
Further, the outer edge of the rear part of the crotch part R, that is, between the skin surface side sheet 4 and the outer surface side sheet 5 corresponding to the rear edge part 2c of the leg hole part S, is swelled along the rear edge part 2c. Thus, a plurality of elastic members 8B around the rear legs are attached in an extended state.
[0048]
When the disposable leg-shaped diaper 1 is manufactured in a lateral flow state in which the disposable pant-type diaper 1 is conveyed in the diaper width direction W, the rear leg elastic member 8B is attached in a continuous meandering manner so as to cross the crotch R. It is set so that the contraction force does not appear (is reduced) at a predetermined portion (described later) of the portion R.
[0049]
In order to prevent the contraction force of the rear leg elastic member 8B from appearing, (1) after attaching the rear leg elastic member 8B between the outer surface side sheet 5 and the skin surface side sheet 4, A method of cutting the rear leg elastic member 8B where the contraction force is not expressed into a plurality of fine pieces, (2) sandwiching the rear leg elastic member 8B between the outer sheet 5 and the skin sheet 4 A method of cutting the elastic member 8B around the rear leg where the contraction force is not expressed from the outside of the outer sheet 5 and the skin side sheet 4 without bonding; What is necessary is just to select suitably from the method of attaching so that the elastic member 8B for an extension may not be extended.
[0050]
The skin surface side sheet 4 and the outer surface side sheet 5 are bonded with a hot melt adhesive or the like with the elastic members 7, 8A, 8B sandwiched therebetween.
[0051]
The plurality of front leg elastic members 8A of the front edge 2b of the leg hole S are set so that the contraction force gradually decreases from the front edge 2b toward the waist elastic member 6. Yes.
[0052]
As an example of this setting method, if the thickness of the plurality of front leg-around elastic members 8A is made thicker as it is closer to the front edge 2b, the thicker the contraction force becomes. In this way, in the manufacturing process, the contraction force can be changed simply by attaching the plurality of front leg elastic members 8A while being pulled at the same expansion ratio. Easy to set up.
[0053]
Further, if the interval between the plurality of front leg elastic members 8A is closer to the front edge 2b, the front leg elastic members 8A having the same thickness can be simply attached in a state of being pulled at the same expansion ratio. Since the contraction force can be changed, it becomes easy to set the contraction force to be gradually weakened.
[0054]
The adhesive body of the skin surface side sheet 4 and the outer surface side sheet 5 is formed by stacking the front abdomen P and the back part Q with the crotch part R as a boundary, and thermally joining the side part 2a as shown in FIG. It will come to be assembled as an exterior pant member 2 as in a).
[0055]
The skin side sheet 4 (the press sheets 9, 10 are the same) is made of a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.). Preferably, the basis weight is 10 to 25 g / m. ² This is a water-repellent nonwoven material. Also, only the inner surface is made hydrophilic [surfactant is applied or a layer of hydrophilic fibers (rayon, cotton, etc.) is made. In this case, the touch when touching the skin is improved, and a sweat absorption effect can be expected.
[0056]
The outer surface side sheet 5 is made of a breathable water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.). Preferably, the basis weight is 10 to 25 g / m. ² This is a water-repellent nonwoven material.
[0057]
The elastic member 6 for waist is made of elastic elastic material (polyurethane yarn, polyurethane film, natural rubber, etc.) usually used for disposable diapers, and is a suitable attachment means such as hot melt adhesive, thermal bonding, ultrasonic bonding, etc. It is attached. A rubber-based hot melt adhesive is preferred. Preferably, a polyurethane yarn having a fineness of 700 to 2000 dtex is stretched and attached at a magnification of 2.0 to 4.0 times.
[0058]
The front leg elastic member 8A and the rear leg elastic member 8B are made of elastic elastic materials (polyurethane yarn, polyurethane film, natural rubber, etc.) that are usually used in disposable diapers. It is attached by suitable attachment means such as sonic bonding. A rubber-based hot melt adhesive is preferred. Preferably, a polyurethane yarn having a fineness of 300 to 1850 dtex is stretched and attached at a magnification of 1.1 to 3.0 times.
[0059]
The elastic member 7 for the back is made of an elastic stretch material (polyurethane yarn, polyurethane film, natural rubber, etc.) that is usually used for disposable diapers, and is a suitable attachment means such as hot melt adhesive, thermal bonding, ultrasonic bonding. It is attached. A rubber-based hot melt adhesive is preferred. Further, preferably, a polyurethane film having a width of 8 mm is stretched and attached at a magnification of 1.1 to 3.0 times. Even if there is such a width on the back side, a plurality of flat film-like elastic members are arranged at intervals, so that a soft fit can be achieved.
[0060]
The absorbent main body 3 includes a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13, and a liquid-absorbent core 14 interposed between the two sheets 12 and 13.
[0061]
The liquid absorbent core 14 has a two-layer structure of a lower layer absorbent body 14A and an upper layer absorbent body 14B. For example, the lower layer absorbent body 14A is preferably a pulp fiber aggregate layer in which a water absorbent resin is mixed. The body 14B is preferably a water absorbent resin layer.
[0062]
As shown in FIG. 3 (b), this lower layer absorbent body 14A is formed, for example, in a front / rear deformed gourd-shaped planar shape that easily fits the wearer's body shape, and has slit openings at appropriate positions in the diaper width direction W. Part 14a is formed. Instead of the slit opening 14a, the lower layer absorber 14A may be divided in the diaper width direction W.
[0063]
This lower layer absorbent body 14 </ b> A is covered with the upper and lower cover sheets 15 to maintain the form. The covering sheet 15 can be appropriately selected from a paper sheet such as a tissue paper or a liquid-permeable non-woven sheet.
[0064]
As shown in FIG. 4A, the upper layer absorbent body 14B is formed in, for example, a rectangular shape that is long in the diaper front-rear direction X, and is divided in the diaper width direction W so as to correspond to the slit opening 14a of the lower layer absorbent body 14A. is doing.
[0065]
As shown in FIG. 4B, the upper layer absorbent body 14B is covered with upper and lower cover sheets 17 having an inner surface coated with a hot melt adhesive 16 to maintain the shape, and the gap between the divided upper layer absorbent bodies 14B is maintained. The upper and lower covering sheets 17 are sealed by heat sealing, ultrasonic sealing or the like to form the sealing portion 14b.
[0066]
FIG. 3A is a plan view of the absorbent main body 3, and the slit opening 14a of the lower layer absorber 14A and the sealing portion 14b of the upper layer absorber 14B are arranged so as to overlap each other.
[0067]
Moreover, as shown in FIG. 2, the crotch elastic member 19 is attached in the stretched state in the diaper front-rear direction X, located between the slit openings 14a of the lower layer absorbent body 14A. Due to the contraction force of the crotch elastic member 19, the liquid-absorbent core 14 fits tightly between the wearer's crotch and the side leakage prevention performance is improved.
[0068]
The crotch elastic member 19 is bonded to the upper surface of the lower cover sheet 15, but may be bonded to the upper surface of the back sheet 13, or the crotch presser sheet (not shown) bonded to the lower surface of the back sheet 13. And may be bonded between the lower crotch presser sheet that is bonded to the skin surface side sheet 4 and the upper crotch presser sheet that is bonded to the back sheet 11.
[0069]
Between the top sheet 12 and the back sheet 13 of the absorbent main body 3, the lower layer absorbent body 14A and the upper layer absorbent body 14B are bonded with a hot melt adhesive or the like.
[0070]
The lower and upper absorbent bodies 14 </ b> A and 14 </ b> B of the absorbent main body 3 are set to have substantially the same width as the width of the front portion of the narrow constricted crotch portion R of the exterior pant member 2. In addition, when absorber 14A, 14B is a gourd type, the most constricted location is set to the substantially same width as the width | variety of the front part of the crotch part R. FIG.
[0071]
On both sides of the absorbent main body 3, a side sheet 21 forming an extension part 21A and a three-dimensional part 21B is disposed, and a lower end part 21a of the side sheet 21 is bonded to a lower surface of the back sheet 13, and the lower end An extending portion 21A that extends outwardly from the portion 21a is formed.
[0072]
Therefore, the width of the front portion of the crotch portion R of the exterior pant member 2 is set to be narrower than the width of the absorbent main body 3 located at the front portion of the crotch portion R, and the extension portion 21A of the side seat 21 is It extends outward from the front of the crotch R.
[0073]
An extending elastic member 22 is attached in the stretched state in the front-rear direction of the diaper in the vicinity of the edge in the width direction in the extending portion 21 </ b> A of the side seat 21.
[0074]
A three-dimensional part 21 </ b> B that rises upward is connected to the extension part 21 </ b> A of the side seat 21. The three-dimensional portion 21B is configured such that the upright base end portion 21b is bonded to the top sheet 12 with a hot melt adhesive 23 and rises outward from the upright base end portion 21b in the diaper width direction W.
[0075]
The standing free end 21c of the three-dimensional part 21B is folded outward, and a three-dimensional elastic member 24 is attached to the folded part in a stretched state in the diaper front-rear direction X. The front and rear end portions of the three-dimensional portion 21B are bonded to the upper surface of the side sheet 21 whose outer surface is on the outer side in the width direction than the upright base end portion 21b.
[0076]
The said absorptive main body 3 comes to adhere | attach on the said exterior pants member 2 with a hot-melt-adhesive in the positional relationship as shown to Fig.1 (a). A portion where the absorbent main body 3 overlaps the front leg elastic member 8A [shown by hatching Y in FIG. ], The absorbent main body 3 is not bonded to the exterior pant member 2.
[0077]
The front and rear end portions of the absorbent main body 3 are covered with the front presser sheet 9 and the rear presser sheet 10. The front presser sheet 9 and the rear presser sheet 10 may be bonded to the exterior pants member 2 as a whole, but can also be formed in a pocket that keeps urine leaking from the front and rear.
[0078]
Further, in order to set the contraction force so that the rear leg elastic member 8B is applied to the liquid absorbent core 14 of the absorbent main body 3, the cut end 8a of the rear leg elastic member 8B absorbs it. It is made to be just before hanging on the liquid-absorbent core 14 of the sex main body 3.
[0079]
Further, as shown in FIG. 3 (a), when a portion corresponding to the crotch portion R of the backsheet 13 is cut into an arc shape along the crotch portion R (see symbol Z), the extended portion of the side seat 21 21A becomes only a breathable nonwoven fabric, and a feeling of wearing becomes comfortable.
[0080]
The liquid-absorbent core 14 is a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet prepared by mixing a granular polymer water-absorbing body with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber. It is an absorbent body that is wrapped in a covering sheet such as, and formed into a predetermined shape (rectangular shape, hourglass shape, gourd shape, etc.). A sheet-like absorbent body (for example, an air-laid absorbent body) obtained by forming the fiber or the polymer water-absorbing body into a sheet shape may be used after being formed into a predetermined shape. In order to maintain the shape even when the wearer walks or rolls over, shape retention means (application of hot melt adhesive, mixing of synthetic fibers) is applied to the hydrophilic fiber aggregate layer or sheet. It doesn't matter.
[0081]
The top sheet 12 is preferably a liquid-permeable nonwoven material. For example, non-woven materials using hydrophilic fibers (cellulose, rayon, cotton, etc.), or non-woven materials made hydrophobic by treating the surface of hydrophobic fibers (polypropylene, polyester, polyamide, nylon, etc.) with a surfactant. Is used. Preferably, the basis weight is 10 to 25 g / m. ² This is a liquid-permeable nonwoven material (point bond nonwoven fabric, air-through nonwoven fabric) in which the back surface of the hydrophobic fiber is treated with a surfactant to make it liquid-permeable.
[0082]
The back sheet 13 may be a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.), plastic film (which may be breathable or non-breathable, but is preferably breathable plastic. Film is preferred) or a composite material thereof. Preferably, the basis weight is 15 to 40 g / m. ² This is a breathable polyethylene film.
[0083]
The side sheet 21 is made of a nonwoven material (such as a spunbond nonwoven fabric, a melt blown nonwoven fabric, or an SMS nonwoven fabric) that has air permeability and water repellency. Preferably, the basis weight is 10 to 25 g / m. ² This is a water-repellent nonwoven material.
[0084]
The extending portion 21A and the three-dimensional portion 21B may be formed integrally with the side sheet 21, but may be divided and bonded to the absorbent main body 3 respectively.
[0085]
The three-dimensional elastic member 24 (the same as the midpoint elastic member 25 described later) is made of an elastic elastic material (polyurethane yarn, polyurethane film, natural rubber, etc.) usually used for disposable diapers. It is attached by a suitable attachment means such as ultrasonic bonding. A rubber-based hot melt adhesive is preferred. Preferably, polyurethane yarn having a fineness of 300 to 2000 dtex is stretched and attached at a magnification of 1.1 to 4.0 times.
[0086]
For joining the above sheet materials, methods such as hot melt adhesive, thermal joining, ultrasonic sealing and the like are appropriately used. For hot melt adhesives, select from hot melt adhesives such as rubber, polyolefin, vinyl acetate, etc., direct coater coating, indirect spiral coating, melt blow (curtain spray) coating, bead coating. Apply by the method. In addition, about the side part 2a, thermal bonding is preferable.
[0087]
According to the disposable pants-type diaper 1 configured as described above, the contracting force of the front leg elastic member 8A gradually decreases from the front edge 2b of the leg hole S toward the elastic member 6 for the waist. Therefore, as shown in FIG. 7A, the front edge 2b where the absorbent main body 3 is located is not easily contracted, and the front edge 2b located on both sides of the absorbent main body 3 is Coupled with the ease of contraction, the front edge 2b located on both sides of the absorbent main body 3 is curved upward with a difference in contraction force.
[0088]
Accordingly, the contraction force of the front leg elastic member 8A acts to lift the absorbent main body 3, so that the absorbent main body 3 can easily fit around the crotch and legs of the wearer, and the front leg elastic member 8A. Since it becomes easy to follow the movement of the wearer's leg, side leakage can be effectively prevented.
[0089]
Moreover, since the front edge part 2b located in the both sides of the absorptive main body 3 curves upwards by the difference in contraction force, a wearer's thigh pressure is reduced and walking becomes easy.
[0090]
Furthermore, since the front edge 2b is curved upward, the front and back of the pants-type diaper 1 can be easily distinguished in relation to the non-curved rear edge 2c, so that there is no possibility of wearing the front and rear incorrectly.
[0091]
Furthermore, since the pant-type diaper 1 is mainly manufactured in a lateral flow state in the diaper width direction W, all of the leg-around elastic members are conventionally curved in a shape that is convex toward the crotch R. In this embodiment, the front leg elastic member 8A in the front edge 2b of the leg hole S can be attached in a straight line in the diaper width direction W. The process can be simplified.
[0092]
Moreover, since the width | variety of the front part of the crotch part R of the exterior pants member 2 is set narrower than the width | variety of the absorptive main body 3, the extension part 21A of the absorptive main body 3 is extended outward from the crotch R. In this state, the fit of the wearer to the crotch becomes better.
[0093]
Further, conventionally, the leg elastic member has been required to be attached in a curved shape that protrudes toward the crotch portion, but when the width of the crotch portion R is narrow as in the present embodiment, it is abrupt. Although it is very difficult to attach in a curved shape, in this embodiment, in particular, the front leg elastic member 8A of the front edge 2b of the leg hole S is provided in the diaper width direction W. Since it can be attached in a straight line, the attachment becomes very easy.
[0094]
Furthermore, since the extending elastic member 22 is attached to the extending portion 21 </ b> A of the absorbent main body 3, the fit of the wearer to the crotch portion is further improved.
[0095]
Further, since the front leg elastic member 8A, the rear leg elastic member 8B, and the extending elastic member 22 can surround the entire circumference of the wearer's leg, the side leakage prevention performance is further improved.
[0096]
Furthermore, since the absorbent main body 3 is not bonded to the exterior pant member 2 at the portion where the absorbent main body 3 overlaps the front leg elastic member 8A, the front leg elastic member 8A and the extending elastic member 22 overlap each other. Since the exterior pant member 3 provided with the front leg elastic member 8A is easily displaced up and down, it is easy to follow the movement of the wearer's leg and the feeling of wear is further improved.
[0097]
In addition, as shown in FIG. 8, if the elastic member 8A for front leg periphery is set so that contraction force may not be expressed in the site | part 8d applied to the liquid-absorbent core 3a of the absorptive main body 3, the elastic member 8A for front leg periphery is set. Since the absorbent core 3a is not distorted by the contraction force, a more comfortable wearing feeling can be obtained. In order to form the portion 8d where the contraction force is not expressed, for example, the front leg elastic member 8A at this portion may be cut with a cutter.
[0098]
Furthermore, since the rear edge 2c of the leg hole S is formed in a shape that bulges outward, it is possible to wrap the wearer's rounded buttocks and fit them softly.
[0099]
In addition, the rear leg elastic member 8B of the leg hole S is set so that the contraction force does not appear at the portion of the absorbent body 3 that is applied to the liquid-absorbent core 14, and therefore the rear leg elastic member 8B. Since the absorbent core 14 is not distorted by this contraction force, a more comfortable wearing feeling can be obtained.
[0100]
Furthermore, since the three-dimensional part 21B is provided in the absorptive main body, the side leakage prevention performance is improved. Further, the three-dimensional part 21B rises outward from the standing base end part 21b in the diaper width direction W, and the three-dimensional elastic part 24 is attached to the standing free end part 21c. The surface of the sheet 12 is not covered and an effective absorption surface area can be secured widely.
[0101]
As shown in FIG. 5, the three-dimensional part 21B of the side seat 21 is folded from the upright base end part 21b toward the outside in the diaper width direction W, and the first three-dimensional part 21B— The intermediate point elastic member 25 is stretched in the diaper front-rear direction X at the upper edge of the first three-dimensional part 21B-1. It is good also as a structure attached by.
[0102]
If comprised in this way, since the solid part 21B is formed with the 1st solid part 21B-1 and the 2nd solid part 21B-2, the solid part 21B can be made high, ensuring a wide effective absorption area. Therefore, the side leakage prevention performance can be further improved. Moreover, since the middle point elastic member 25 is attached to the upper edge of the first three-dimensional part 21B-1, the second three-dimensional part 21B-2 stands up firmly, so that the side leakage prevention performance can be further improved. it can.
[0103]
As shown in FIG. 6 and FIG. 7 (b), a hook portion 26 A of a hook-and-loop fastener is provided on the back sheet 13 at the front and rear ends of the absorbent main body 3, and the skin side sheet 4 of the exterior pant member 2 is faced. A zipper loop portion 26 </ b> B may be provided so that the absorbent main body 3 is detachably locked to the exterior pant member 2.
[0104]
Here, the hook-and-loop part is a hook and loop part, and when the two are pressed strongly, the hook part and the loop part are locked so that they are not easily detached from each other. If it is strongly peeled off by hand, the hook part and the loop part are disengaged. This is also called a mechanical fastener.
[0105]
Moreover, since the nonwoven fabric sheet itself also has a function as a loop portion of the surface fastener, the loop portion can be omitted if a nonwoven fabric sheet is used instead of providing the loop portion. In addition, it may replace with a hook_and_loop | surface fastener and the adhesive which can be peeled repeatedly may be sufficient.
[0106]
Although the said hook-and-loop fastener can also be provided in the whole surface of the back seat | sheet 13 of the absorptive main body 3, if it provides only in the front-and-rear end part like this embodiment, after mounting | wearing the underpants type diaper 1, the absorptive main body 3 The adjustment for suitably fitting can be easily performed. When the hook portion 26A of the hook-and-loop fastener is provided, the back sheet 13 other than the portion where the hook portion 26A exists is not bonded to the exterior pant member 2 or is partially bonded to the extent of temporary fixing. Preferably it is.
[0107]
If comprised in this way, since only the absorptive main body 3 can be replaced | exchanged and the exterior pants member 2 can be reused, it becomes economical.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a disposable pants-type diaper, where (a) is a developed view and (b) is a cross-sectional view taken along line AA of (a).
2A is an enlarged sectional view taken along line BB in FIG. 1A, and FIG. 2B is a development view of an exterior pant member.
FIG. 3 is an absorbent main body, (a) is a plan view, and (b) is a plan view of a lower layer absorbent body.
4A and 4B are upper layer absorbers, in which FIG. 4A is a plan view, and FIG. 4B is an enlarged sectional view taken along line CC of FIG.
FIG. 5 is an enlarged cross-sectional view corresponding to the line BB in FIG.
6 is a modified disposable pants-type diaper, in which (a) is a developed view, and (b) is a sectional view taken along the line DD of (a). FIG.
7A is a perspective view of the disposable pant-type diaper of FIG. 1, and FIG. 7B is a perspective view of the disposable pant-type diaper of FIG.
FIG. 8 is a development view of main parts of a disposable pants-type diaper showing a modification of the elastic member for the front leg periphery.
[Explanation of symbols]
1 disposable pants-type diapers
2 Exterior pants
2b Front edge
2c Rear edge
3 Absorbent body
4 Skin side sheet
5 Outer sheet
6 Elastic member for waist
8A Elastic member for front leg area
8B Rear leg elastic member
14 Liquid absorbing core
14A Underlayer absorber
14B Upper layer absorber
21 Side seat
21A extension part
21B solid part
21B-1 1st solid part
21B-2 2nd solid part
22 Elastic member for extension
24 Three-dimensional elastic member
25 Midpoint elastic member
26A hook part
26B Loop section
P front abdomen
Q back
R crotch
S Leg hole
W Diaper width direction
X Diaper anteroposterior direction

Claims (13)

An exterior pant member having leg holes formed on both sides of the crotch between the front and back parts, and an absorbent main body provided in the crotch of the exterior pant member and extending in the front-rear direction of the diaper In disposable pants-type diapers
An elastic member for waist is attached to the exterior pant member in an expanded state, and an elastic member for leg periphery is attached in an extended state along at least the front edge portion and the rear edge portion of the leg hole portion. The plurality of front leg elastic members at the front edge are set so that the contraction force gradually decreases from the front edge toward the waist elastic member. Diapers. The disposable pants-type diaper according to claim 1, wherein the plurality of front leg elastic members at the front edge are linearly extended in the diaper width direction. The width of the crotch part of the exterior pant member is set to be narrower than the width of the absorbent main body located in the crotch part, and the absorbent main body extends outward from the crotch part. Disposable pants-type diapers. The disposable pants according to any one of claims 1 to 3, wherein an elastic member for extension is attached in an extended state in the front-rear direction of the diaper in the vicinity of the edge in the width direction of the extension part of the absorbent main body. Type diapers. The disposable pants-type diaper according to any one of claims 1 to 4, wherein a diameter of the elastic member for around the front leg is set to be thicker as it approaches the front edge. The disposable pants-type diaper according to any one of claims 1 to 4, wherein an interval between the front leg elastic members is set to be narrower toward a front edge portion. The disposable pants-type diaper according to any one of claims 1 to 6, wherein the absorbent main body is not joined to the exterior pant member at a portion where the absorbent main body overlaps the elastic member for the front leg. The disposable pants-type diaper according to any one of claims 1 to 6, wherein the elastic member for around the front leg is set so as not to develop a contractile force at a portion of the absorbent main body that is applied to the liquid-absorbent core. The disposable pants-type diaper according to any one of claims 1 to 8, wherein the rear edge of the leg hole is formed in a shape that bulges outward. The elastic member for the rear leg portion of the rear edge portion of the leg hole portion is set so that contraction force does not appear at a portion that is applied to the liquid-absorbent core of the absorbent main body. Disposable pants-type diapers as described in 1. The absorbent main body is composed of a liquid-permeable top sheet, a liquid-impervious back sheet, and a liquid-absorbent core interposed between the two sheets, and both side edges of the liquid-absorbent core. An extending portion extending outwardly from each other and a three-dimensional portion standing upward from both side edge portions, and the three-dimensional portion rises from the standing end portion toward the outer side in the diaper width direction and stands up. The disposable pants-type diaper according to any one of claims 1 to 10, wherein a three-dimensional elastic member is attached to the free end portion in a stretched state in the diaper front-rear direction. The three-dimensional portion is formed of a first three-dimensional portion that is folded outward from the standing edge in the diaper width direction and a second three-dimensional portion that is folded inward from the upper edge of the first three-dimensional portion. The disposable pants-type diaper according to claim 11, wherein an elastic member is attached to the upper edge of the first three-dimensional part in a stretched state in the longitudinal direction of the diaper. The disposable pants-type diaper according to any one of claims 1 to 12, wherein the absorbent main body is detachably locked to an exterior pant member.

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