JP2006198353A - Pants type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a pants type disposable diaper which is easy to put on and can be worn suitably. <P>SOLUTION: An armored sheet 20 in a paper diaper 1 comprises a waist circumference elastic band 25a consisting of two or more waist circumference resilient members 25 arranged in portions ranging from one junction end (21, 22) of each to the other junction end (21, 22) in the front body F and the rear body B, elbowing elastic bands (26a, 28a) consisting of two or more elbowing resilient members (26, 28) which extend to the inside leg section 20c side from respective one junction end (21, 22) in the front body F and the rear body B and are arranged over the other junction end (21, 22) so as to bypass the inside leg section, and an absorptive main body 10 arranged in the inside leg section 20c, wherein the elbowing elastic bands (26a, 28a) are formed so as to cover mostly the whole sectors (Trf, Trb) of the armored sheet surrounded by the marginal part and absorptive main body 10 of the armored sheet 20 and the waist circumference elastic band 25a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pants-type disposable diaper with improved ease of wearing and improved fit.

Conventionally, in a pants-type disposable diaper, an elastic stretch member is disposed on the exterior sheet that holds the absorbent body in order to attach the absorbent body that absorbs body fluids to the body, so that the body fit is improved. It is designed to improve.
For example, as shown in FIG. 10, in a diaper body 50 in which an absorbent body 40 is interposed between a top sheet and a back sheet, waist elastic members disposed on a front body 50F and a back body 50B that form a waist opening. 51, leg elastics that are curved from the front body 50F and the back body 50B to the substantially central side of the crotch part 50C so as to be along the edge of the diaper body 50 that forms the leg opening. A pants-type disposable diaper including members 52, 52... Is known (see, for example, Patent Document 1).

Further, as shown in FIG. 11, a plurality of elastic elastic members 61, 61. There is known a pants-type disposable diaper in which the elastic elastic member is arranged so as to be convexly curved from the waist opening side to the crotch part side as it goes to the part side (see, for example, Patent Document 2).
JP 2001-258931 A JP 2001-204762 A

  However, in the case of Patent Document 1, the leg elastic member 52 is disposed along the edge of the diaper main body 50 that forms the leg opening, and therefore, the leg opening due to the contraction force of the leg elastic member 52. Can be fitted to the wearer of the diaper, but the substantially triangular region Tr in the exterior sheet composed of the top sheet and the back sheet, surrounded by the leg elastic member 52, the waist elastic member 51, and the absorber 40, Is contracted by the leg elastic member 52 and the waist elastic member 51, the inside of the substantially triangular region Tr is swelled in the product state, and a pocket-like space is formed inside the diaper. It will be.

When such a pants-type disposable diaper is taken off and worn, there is a problem that a toe or a heel may be caught in this pocket-like space, which may hinder wearing.
Moreover, in the case of the said patent document 2, the diaper itself and the absorber of a diaper are made to fit a body by curving the elastic elastic member of the crotch part side among several elastic elastic members 61, 61 .... However, the contraction force of the elastic elastic member 61, which is an action force for stabilizing the diaper around the waist, becomes weak, and there is a problem that the diaper tends to slip off from the waist.

  In addition, pants-type disposable diapers (paper diapers) are worn by elderly people or have weak physical strength due to illness or disability. There may be no.

And when such a wearer uses a paper diaper, it may have to be worn around the waist by grabbing the front body side and side part side of the paper diaper, but in the case of a conventional paper diaper, As shown in FIG. 12, the waist part of the back body of a paper diaper was caught by the swelling of the buttocks, and it was not pulled up enough, and the paper diaper might be worn in an incomplete state. And the wearing of a paper diaper is an incomplete state, and it may become the cause of bodily fluids, such as urine, by not fitting around the waist.
An object of the present invention is to provide a pants-type disposable diaper that is easy to wear and can be suitably worn.

In order to solve the above-mentioned problem, the present invention according to claim 1 is provided with an absorbent main body including an absorbent body, and an exterior sheet integrally provided on the outer surface side of the absorbent main body. In the pants-type disposable diaper in which the waist opening and the pair of left and right leg openings are formed by joining the front body and the back body of the seat at the joint ends of the both side ends,
The absorbent main body is provided in a crotch part formed so as to extend in a concave shape outward in the width direction from the absorbent main body over the back body from the front body of the exterior sheet,
The exterior sheet includes a plurality of waist elastic members disposed substantially parallel to each other at intervals in the vertical direction from one joining end to the other joining end in the front body and the back body. An elastic band around the waist, and extending from one joint end of at least one of the front body and the back body to the crotch part side so as to bypass the crotch part and span the other joint end part A curved elastic band comprising a plurality of curved elastic members, and the curved elastic band is surrounded by an edge of the outer sheet, the absorbent main body, and the waist elastic band. A pants-type disposable diaper characterized by being formed so as to substantially cover the whole is provided.

  According to the first aspect of the present invention, the exterior sheet of the pants-type disposable diaper has a plurality of waists arranged from one joint end portion to the other joint end portion in the front body and the back body. A waist elastic band made of an elastic member, and extends from one joint end of at least one of the front body and the back body to the crotch side, and is arranged over the other joint end so as to bypass the crotch part A curved elastic band made of a plurality of curved elastic members, and an absorbent main body disposed in the crotch part.

  And since the curved elastic band is formed so as to substantially cover the entire area of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band, the entire area of the exterior sheet is It is contracted almost uniformly by the curved elastic band, and the inside of the region does not swell as in the conventional case, and a pocket-like space is not formed. Thus, if there is no pocket-like space on the inside of the pants-type disposable diaper (exterior sheet), when the wearer takes off the pants-type disposable diaper and wears it, the toes and heels are on the inside. Since it becomes difficult to catch, it becomes easy to wear a pants-type disposable diaper.

  In addition, the pant-type disposable diaper includes a waist elastic band (waist elastic member) on the front and back of the body separately from the curved elastic band (curved elastic member). The diaper can be worn stably around the waist, making it difficult for the pants-type disposable diaper to slip down. Therefore, it can be said that such a pants-type disposable diaper is a pants-type disposable diaper that can be suitably worn.

  According to a second aspect of the present invention, there is provided the pant-type disposable diaper according to the first aspect, wherein the curved elastic band is provided in the back body.

  According to the second aspect of the present invention, the same effect as that of the first aspect of the present invention is obtained, and in particular, the curved elastic band is provided in the back body. Even when the pants-type disposable diaper is pulled up by grasping the front body, the acting force acting on the front body is transmitted to the curved elastic band of the back body through the joint end, and the back body is preferably pulled up so as to cover the buttocks. The pants-type disposable diaper can be worn well around the waist.

  In other words, since the curved elastic band is curved so as to bypass the crotch part side, the acting force transmitted to the curved elastic band on the back body acts to pull up the back body of the pants-type disposable diaper from below. The wearer of this pants-type disposable diaper can grab and pull up the front body side of the pants-type disposable diaper that is easy to grip even when the arm strength is weak or the arm does not sufficiently cover the back side or the buttock side. By doing, it can pull up so that a back body may cover a buttocks, and can wear a underpants type disposable diaper suitably.

  According to a third aspect of the present invention, there is provided the pants-type disposable diaper according to the first aspect, wherein the curved elastic band is provided in the front body and the rear body.

  According to the third aspect of the invention, it has the same effect as that of the first aspect of the invention, and in particular, the curved elastic band is provided in the front body and the back body. The pocket-like space inside the diaper (exterior sheet) that hinders wearing is eliminated from the front and back bodies.

  Therefore, when the wearer takes off the pants-type disposable diaper and wears it, the toes and the heel are less likely to be caught inside the pants-type disposable diaper, making it easier to wear the pants-type disposable diaper.

  In addition, since the curved elastic band is curved so as to detour to the crotch part side, if the action force that pulls up the pant-type disposable diaper is transmitted to the curved elastic band, it acts to lift the pant-type disposable diaper from the lower side. , Wearers of this pant-type disposable diaper can grasp and pull up the front body side of the pant-type disposable diaper that is easy to grasp even when the arm strength is weak or the arm does not sufficiently cover the back side or the buttocks side By doing so, the pants-type disposable diaper can be pulled up to fit around the waist, and the pants-type disposable diaper can be suitably worn.

  As the present invention according to claim 4, in the region of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band, the interval between the curved elastic members constituting the curved elastic band is A pants-type disposable diaper according to any one of claims 1 to 3, which is 20 mm or less.

  According to the invention of claim 4, an interval between the curved elastic members in a substantially triangular region of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band is 20 mm or less. To do. When the distance between the curved elastic members is 20 mm or less, preferably 15 mm or less, and more preferably 9 mm or less, the toes are caught between the curved elastic members when the legs are passed through the leg opening for wearing the diaper. There is no, you can pass your feet smoothly.

  As the present invention according to claim 5, in the region of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band, it is normal to the curved elastic member closest to the leg opening. A pants-type disposable diaper according to any one of claims 1 to 4, wherein a curved elastic band is formed over an area of at least 30 mm.

  According to the fifth aspect of the present invention, in the substantially triangular region of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band, from the curved elastic member closest to the leg opening. A curved elastic band is formed over a region of at least 30 mm or more, preferably 50 mm or more in the normal direction. In other words, if the width of the curved elastic band is ensured to be equal to or larger than the above numerical value in the triangular region, the effects described in the first to third aspects can be sufficiently exhibited. Therefore, as long as a curved elastic band width equal to or greater than the above numerical value is secured, there may be an exterior sheet portion in which the curved elastic member is not disposed in a region inside the curved elastic band in the triangular region.

  As the present invention according to claim 6, there is provided the pant-type disposable diaper according to any one of claims 1 to 5, wherein the curved elastic band is composed of at least four or more curved elastic members.

  According to the sixth aspect of the present invention, the curved elastic band is composed of at least 4 or more, preferably 6 or more, more preferably 8 or more curved elastic members.

  As the present invention according to claim 7, in the area of the exterior sheet surrounded by the edge of the exterior sheet, the absorbent main body, and the waist elastic band, the area ratio occupied by the curved elastic band is 70% or more. A pants-type disposable diaper according to any one of claims 1 to 6 is provided.

  According to the seventh aspect of the present invention, the area ratio of the curved elastic band in the substantially triangular area of the outer sheet surrounded by the edge of the outer sheet, the absorbent main body, and the waist elastic band. Is 70% or more. In other words, the effect described in the inventions of claims 1 to 3 can be sufficiently exerted if a curved elastic band area ratio equal to or higher than the above numerical value is secured in the triangular region. The curved elastic band area ratio should be secured at least in the triangular area on the front body side so that it is easy to wear without catching the toes, and the toes will hit the back body. Depending on the case, the area ratio may be lower.

  As the present invention according to claim 8, the start and end portions of the curved elastic band are arranged in the width direction of the joint end portions of the front body and the back body where the start and end portions of the waist elastic band are disposed. The pants-type disposable diaper according to any one of claims 1 to 7, wherein the pants-type disposable diaper is provided in substantially the same range as the range.

  According to the invention described in claim 8, while having the same effect as the invention described in any one of claims 1-7, the start / end part of the curved elastic band is provided with the start / end part of the waist elastic band. Since the front end of the body and the back end of the back end are arranged in the same range as the width direction, the wearer wears a pants-type disposable diaper. The acting force at the time of grasping and pulling up the body is transmitted to the curved elastic band, the crotch part can be easily pulled up, and the crotch part of the pants-type disposable diaper can be suitably worn around the crotch of the body.

  In particular, the curved elastic band forms a band-like region where a wide range of elastic members are arranged, so that the acting force when grasping and pulling up the front body and the back body is easily transmitted to the curved elastic band. The pants-type disposable diaper can be pulled up even with light force. Therefore, even a wearer with weak arm strength, such as an elderly person, can suitably wear a pants-type disposable diaper.

  The present invention according to claim 9 is characterized in that the curved elastic band disposed on the exterior sheet is cut and discontinuous in a range overlapping with the absorber. A pants-type disposable diaper according to any one of 8 is provided.

According to the ninth aspect of the present invention, the curved elastic band disposed on the exterior sheet has the same effect as that of any of the first to eighth aspects of the present invention. Since it is cut and discontinuous, the curved elastic band does not exert contraction force on the absorber.
In other words, since the curved elastic band does not cause the absorber to contract and contract, the absorber is difficult to deform, can absorb body fluid such as urine well, and reduce body fluid leakage. Can do.

  As described in detail above, according to the present invention, a pants-type disposable diaper that is easy to wear and can be suitably worn is obtained.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a product state external view of a pants-type disposable diaper according to the present invention, FIG. 2 is an assembled view in a developed state, and FIG. 3 is a developed view of an exterior sheet. 6 is a plan view of the absorbent main body provided in the pants-type disposable diaper, and FIG. 7 is a cross-sectional view taken along the line V-V in FIG.

  As shown in FIGS. 1 to 7, a pants-type disposable diaper 1 (hereinafter, a paper diaper 1) includes an absorbent main body 10 including an absorbent body 13 and an exterior integrally provided on the outer surface side of the absorbent main body 10. A front body F on the front end side of the crotch part 20c in the product sheet and a rear body B on the rear end side of the crotch part 20c in the product state. , 22), a waist opening W located around the waist of the wearer and a pair of left and right leg openings L through which the wearer's legs are passed are formed.

  As shown in FIG. 2, the paper diaper 1 is an upper surface side of the exterior sheet 20, and the outer surface side of the absorbent main body 10 is bonded to the body side when the paper diaper is worn by an adhesive such as hot melt. And the exterior sheet 20 are integrated. Then, the front body F and the back body B of the exterior sheet 20 are folded so that the crotch part 20c of the exterior sheet 20 is folded together with the absorbent main body 10, and the joining end portion 21 and the joining end portion 22 are thermally welded to the left or right. The paper diaper 1 shown in FIG. 1 is assembled by bonding with a hot melt adhesive, ultrasonic waves, or the like.

(Absorbent body)
As shown in FIGS. 6 and 7, the absorbent main body 10 is formed between a liquid-permeable surface sheet 11 made of a nonwoven fabric or the like and a leak-proof sheet 12 made of polyethylene, etc. It has a structure in which an absorber 13 made of is interposed, and absorbs and retains body fluids.
Moreover, the absorptive main body 10 has a pair of left and right three-dimensional gathers BS along the longitudinal direction of the side edges of the absorptive main body 10.

  The absorbent body 13 is formed, for example, so as to have a substantially hourglass shape in plan view, and the width dimension thereof is a size that does not give a feeling of gore when hitting the wearer's body.

  The absorbent body 13 is surrounded by the crepe paper 14 in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable surface sheet 11. A second sheet 17 is interposed between the crepe paper 14 and the liquid-permeable surface sheet 11. In addition, as this absorber 13, you may use the air-laid absorber which can make a volume small.

  As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the nonwoven fabric by the spunlace method is excellent in terms of richness in flexibility and drape, and the nonwoven fabric by the thermal bond method is excellent in terms of being bulky and soft.

  Moreover, when many through-holes are formed in the liquid-permeable surface sheet 11, urine etc. will be absorbed rapidly and it will be excellent in dry touch property.

  As the leak-proof sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impervious plastic sheet such as polyethylene or polypropylene is used, but in recent years, it has moisture permeability from the viewpoint of preventing stuffiness. Are preferably used. This water-impervious / breathable sheet is, for example, a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is. In the case of a microporous sheet, if the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, so that it is superior in terms of flexibility.

  As such a leak-proof sheet 12, it is preferable to use an opaque sheet so that brown color such as defecation and urine is difficult to visually recognize. The opaque sheet 12 is made opaque by adding pigments and fillers such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc, and barium sulfate into an olefin resin or plastic. Preferably used.

  The three-dimensional gather BS is formed by a gathered nonwoven fabric 15 that is doubled by folding, and a waterproof sheet 18 that is sandwiched between the gathered nonwoven fabric 15 that is folded, and the gathered nonwoven fabric 15 is wound by the liquid-permeable surface sheet 11. Further, the side edge portion of the absorbent body 13 is further wound from above, and is extended to the back surface side of the absorbent body 13 and bonded thereto. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the intermediate portion in the longitudinal direction of the disposable diaper 1 (absorbent body 10), and the range from the intermediate portion in the width direction to the back side of the absorbent body 13 is hot. Bonded by a melt adhesive or the like, and at the front and rear end portions in the longitudinal direction, the section from the middle portion in the width direction to the one side end edge is bonded within the range extending to the back side of the absorber 13 and forms a three-dimensional gather BS The portion to be bonded is bonded by a hot melt adhesive or the like while being folded at the upper surface portion of the absorbent body 13.

  In addition, a plurality of thread-like elastic elastic members 16... Are disposed inside the gathered nonwoven fabric 15 that is folded back twice on the standing tip side of the gather. The thread-like elastic stretch members 16... Are for raising the gathered nonwoven fabric 15 by an elastic stretch force to form a three-dimensional gather BS.

  As the thread-like elastic elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester and the like can be used. The thread-like elastic elastic member 16 is preferably arranged with a thickness of 300 to 1200 dtex and a tension of 150 to 350%. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

  Moreover, the raw material fiber which comprises the gathered nonwoven fabric 15 is the same as the liquid-permeable surface sheet 11, In addition to synthetic fibers, such as olefin type, polyester type, and polyamide type, such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, Natural fibers such as cotton can be used, and nonwoven fabrics obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. In order to prevent this, it is preferable to use a non-woven fabric that has a low weight and excellent air permeability. Furthermore, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to improve the feel to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic chromoid-based water repellent material You may use the water-repellent treatment nonwoven fabric which coated etc.

(Exterior sheet)
As shown in FIGS. 1 to 3, the exterior sheet 20 is a nonwoven fabric sheet having a two-layer structure including an upper layer nonwoven fabric 20A and a lower layer nonwoven fabric 20B, and various elastic members described later between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B. Is provided to give stretchability.

The exterior sheet 20 has a crotch part 20c that covers the crotch area of the wearer of the disposable diaper 1 and has a crotch part 20c that is formed with concave leg-around cut lines 29 for providing leg openings L on both sides of the outer sheet. It has a front body F that is located on the front end side of 20c and covers the abdomen of the wearer, and a rear body B that is located on the rear end side of the crotch part 20c and covers the back of the wearer. It has a pseudo hourglass shape.
The front body F is formed with a joining end 21 for joining with the back body B, and the back body B is formed with a joining end 22 for joining with the front body F.

  The joining end portion 21 and the joining end portion 22 have a vertical width extending from the opening end side of the waist opening W to the leg opening L having the leg-around cut line 29 in the front body F and the back body B, respectively. Have.

  The exterior sheet 20 includes a plurality of waist elastic members 24 arranged on the opening end side (upper side) of the waist opening W in the front body F and the back body B, and the front body F and the back body. In each of B, a plurality of waist elastic members 25, 25,... Arranged in front of each other at intervals in the vertical direction from the opening end side of the waist opening W toward the crotch 20c, and the front body F , A plurality of curved elastic members 26, 26,... That extend from one joint end 21 toward the crotch 20c side and are disposed so as to bypass the crotch 20c and extend to the other joint end 21. In the back body B, a plurality of curved elastic members 28 that extend from one joint end portion 22 toward the crotch portion 20c and are disposed to extend over the other joint end portion 22 so as to bypass the crotch portion 20c. 28 ... To have.

  The waist elastic member 24 is spaced apart in the vertical direction in the vicinity of the waist opening W in the range that is the width in the vertical direction of the joint end 21 and the joint end 22 where the front body F and the back body B are joined. A plurality of thread rubber-like elastic members disposed on the body, for applying an elastic force so as to tighten around the waist part of the body, and for attaching the disposable diaper 1 to the body. The waist elastic member 24 is not limited to the rubber thread elastic member, and may be a tape elastic member.

  The waist elastic member 25 includes a joint end 21 and a joint end 22 where the front body F and the back body B are joined. A plurality of thread rubber-like elastic elastic members arranged substantially parallel to each other for applying an elastic force so as to tighten the waist portions of the front body F and the back body B, thereby bringing the disposable diaper 1 into close contact with the body. Is.

  The plurality of waist elastic members 25, 25... Function as waist elastic bands 25 a having a predetermined width by being disposed on the exterior sheet 20 over a predetermined width and range. The entire back body B is brought into close contact with the body.

  Note that the boundary between the waist elastic member 25 and the waist elastic member 24 is not necessarily clear. For example, among the plurality of elastic members arranged substantially parallel to each other in the vertical direction on the front body F and the back body B, some of the upper elastic members function as waist elastic members, and the rest The lower elastic member may function as a waist elastic member.

  In the front body F, a plurality of curved elastic members 26 are provided separately from the waist elastic member 25, specifically at least four, preferably six or more, more preferably eight or more (this embodiment) 9) is an elastic elastic member in the form of a rubber thread.

  The plurality of curved elastic members 26, 26... Function as curved elastic bands 26 a having a predetermined width by being disposed on the exterior sheet 20 over a predetermined width and range.

  The curved elastic band 26a extends from one joint end 21 of the front body F to the crotch 20c side substantially along the leg cutting line 29, and bypasses the crotch 20c so as to bypass the crotch 20c. It is arranged so as to reach the other joining end 21 while being substantially along the surrounding cut line 29.

  The curved elastic band 26a is substantially the same as the substantially triangular area Trf surrounded by the leg cut line 29, which is the edge of the exterior sheet 20, the absorbent main body 10, and the waist elastic band 25a. It is formed so as to cover the whole. Here, the fact that the curved elastic band 26a covers substantially the entire triangular region Trf does not mean that the curved elastic band 26a is arranged densely without leaving the entire region, but the triangular shape compared to the conventional conventional pants-type disposable diapers in general. This means that the number of the curved elastic members 26 in the region Trf is large, and the proportion of the disposed regions is large.

In the substantially triangular region Trf, as shown in FIG. 4, the interval P between the curved elastic members 26 is 20 mm or less, preferably 15 mm or less, more preferably 9 mm or less. ... of the curved elastic members 26, 26,... Constituting the curved elastic band 26a, from the curved elastic member 26 _O closest to the leg opening L over the range FZ of at least 30 mm, preferably 50 mm or more in the normal direction. It is desirable that the curved elastic band 26 is formed, and in the substantially triangular area Trf, the area ratio occupied by the area of the curved elastic band 26a (the hatched area in the figure) is desirably 70% or more.

  The start and end portions of the curved elastic band 26a are disposed over substantially the entire range of the joint end portion 21 of the front body F, which is the width in the vertical direction, and in particular, the start and end of the waist elastic band 25a. The joint end 21 of the front body F in which the part is disposed is disposed in substantially the same range as the range in the width direction.

  Moreover, it is preferable that the curved elastic band 26a (curved elastic member 26) is changed in direction so as to be curved in an arcuate curved shape when detouring in the crotch part 20c. Since the elastic member exerts a stretching force in the tangential direction, the force acting in the width direction of the absorbent main body 10 can be minimized by inverting the curved elastic member 26 in the arcuate curved shape in the crotch part 20c. The shrinkage of the absorbent main body 10 at the crotch part 20c can be reduced.

  On the other hand, in the back body B, a plurality of the curved elastic members 28 are arranged separately from the waist elastic member 25, specifically, in the same manner as the front body F, specifically, at least 4 or more, preferably 6 or more, more preferably 8 or more (9 in this embodiment) elastic rubber elastic elastic members.

  The plurality of curved elastic members 28, 28... Function as curved elastic bands 28 a having a predetermined width by being disposed on the exterior sheet 20 over a predetermined width and range.

  The curved elastic band 28a extends from one joint end 22 of the back body B to the crotch 20c side substantially along the leg-cutting line 29, and bypasses the crotch 20c so as to bypass the crotch 20c. It is arranged so as to reach the other joint end 22 while being substantially along the surrounding cut line 29.

  The curved elastic band 28a is substantially the whole of the substantially triangular region Trb surrounded by the leg circumference cut line 29, which is the edge of the exterior sheet 20, the absorbent main body 10, and the waist circumference elastic band 25a. It is formed so as to cover. Here, the fact that the curved elastic band 28a covers substantially the entire triangular region Trb does not mean that the curved elastic band 28a is arranged densely without leaving the entire region, but the triangular shape compared to the conventional pants-type disposable diapers in general. This means that the number of the curved elastic members 28 in the region Trb is large and the proportion of the region to be disposed is large.

In the substantially triangular region Trb, as shown in FIG. 5, the interval P between the curved elastic members 28 is 20 mm or less, preferably 15 mm or less, more preferably 9 mm or less. ... of the curved elastic members 28, 28... Constituting the curved elastic band 28a from the curved elastic member 28 _O closest to the leg opening L over the range BZ of at least 30 mm, preferably 50 mm or more in the normal direction. It is desirable that the curved elastic band 28 is formed, and in the substantially triangular area Trb, the area ratio occupied by the area of the curved elastic band 28a (the hatched area in the figure) is preferably 70% or more. However, since the substantially triangular region Trb of the back body B is on the toe side when passing the leg through the leg opening L when wearing the diaper, the area ratio may be less than 70% in some cases. Is preferably 50% or more.

  Note that the start / end portion of the curved elastic band 28a is disposed over substantially the entire range of the joining end portion 22 of the back body B, which is the width in the vertical direction, and in particular, the start / end of the waist elastic band 25a. It is arranged in a range substantially the same as the range in the width direction of the joining end 22 of the back body B where the part is arranged.

  In addition, the curved elastic band 28a (curved elastic member 28) is preferably changed in direction so as to be bent into an arcuate curved shape when detouring at the crotch part 20c. Since the elastic member exerts a stretching force in the tangential direction, the force acting in the width direction of the absorbent main body 10 can be minimized by inverting the curved elastic member 28 in the arcuate curved shape in the crotch part 20c. The shrinkage of the absorbent main body 10 at the crotch part 20c can be reduced.

  Thus, in the exterior sheet 20 of the paper diaper 1, since the substantially triangular region Trf is covered with the curved elastic band 26a and the substantially triangular region Trb is covered with the curved elastic band 28a, the substantially triangular region Trf and the substantially triangular region Trb. Are substantially uniformly contracted by the curved elastic band 26a and the curved elastic band 28a, respectively, and the insides of these substantially triangular regions Trf and Trb swell, forming a pocket-like space. Absent. If there is no pocket-like space inside the disposable diaper 1 that hinders wearing, when the wearer takes off and wears the disposable diaper 1, it becomes difficult for toes and heels to get caught inside the disposable diaper 1, making it easier to wear the disposable diaper 1. .

  Further, the substantially triangular region Trf and the substantially triangular region Trb in the outer sheet 20 of the paper diaper 1 are covered and contracted by the curved elastic band 26a and the curved elastic band 28a, respectively, and thus correspond to shapes such as body irregularities and bulges. And it can be expanded and contracted to fit the exterior sheet 20.

  That is, on the front body F side of the disposable diaper 1, the exterior sheet 20 and the absorbent main body 10 can be brought into close contact with the body's urination opening. On the rear body B side of the disposable diaper 1, the exterior sheet 20 is disposed on the buttocks. Can be brought into close contact with each other. As a result, the paper diaper 1 (absorbent main body 10) can be brought into close contact with the body more reliably, and body fluid such as urine can be prevented from leaking.

  Further, the paper diaper 1 includes the waist elastic band 25a (waist elastic member 25) separately from the curved elastic band 26a and the curved elastic band 28a (the curved elastic member 26, the curved elastic member 28). Can be worn stably around the waist, making it difficult for the disposable diaper 1 to slide down.

  In addition, the start and end portions of the curved elastic band 26a and the curved elastic band 28a are connected to the joint end 21 of the front body F and the joint end 22 of the back body B where the start / end portions of the waist elastic band 25a are disposed. Since the wearer wears the disposable diaper 1 when the wearer wears the disposable diaper 1, the acting force when grasping and pulling up the front body F and the back body B is applied to the curved elastic band 26 a and the curved elasticity. The crotch part 20c can be easily pulled up by being transmitted to the belt 28a, and the crotch part 20c of the disposable diaper 1 can be suitably worn around the crotch of the body. In particular, the curved elastic band 26a and the curved elastic band 28a form a band-like region in which a wide range of elastic members are disposed, so that the acting force when the front body F and the back body B are grasped and pulled up is curved. Since it is easy to be transmitted to the elastic band 26a and the curved elastic band 28a, the paper diaper 1 can be pulled up with a lighter force. Therefore, even if it is a wearer with weak arm strength like an elderly person, the paper diaper 1 can be worn suitably.

  Further, since the front body F and the back body B are joined by the joining end portions 21 and 22, the acting force acting on the front body F is transmitted to the curved elastic band 28a via the back body B, and the back body B The acting force acting on the elastic band 26a is transmitted to the curved elastic band 26a through the front body F.

  And, for example, even when the wearer grabs the front body F with one hand and pulls up the paper diaper 1, the acting force acting on the front body F is rearward through the joining end portions 21 and 22 as shown in FIG. 8. It is transmitted to the curved elastic band 28a of the body B, and the back body B can be pulled up so as to suitably cover the buttocks, so that the disposable diaper 1 can be worn well around the waist. In particular, since the curved elastic band 28a is curved toward the crotch 20c side, the absorbent main body 10 on the crotch 20c side is more closely attached to the buttocks so that the absorbent main body 10 is pulled up to the buttocks side, thereby leaking body fluid such as urine. It becomes possible to prevent.

  Moreover, since the paper diaper 1 is easy to pull up so that it may fit around the waist, it can reduce wearing in an incomplete state. It alleviates problems such as body fluid leaks, poor wear and appearance, poor blood flow due to pressure on the body, and skin troubles such as rough skin caused by rubbing the body. can do.

  Thus, it can be said that the paper diaper 1 is a pants-type disposable diaper that can be suitably worn.

  In the above embodiment, the waist elastic band 25a (waist elastic member 25), the curved elastic band 26a, and the curved elastic band 28a (curved elastic member 26, curved elasticity) disposed on the front body F and the back body B are also shown. The member 28) is arranged continuously in the range where it overlaps with the absorbent main body 10, particularly the absorbent body 13, but as shown in FIG. 9, the elastic member overlaps across the absorbent main body 10 (absorbent body 13). The member may be cut to be discontinuous. By making the elastic member discontinuous on the absorbent main body 10 (absorber 13), the absorbent main body 10 (absorber 13) can be prevented from being contracted.

  The discontinuity of the elastic member is, for example, by placing various elastic members on the exterior sheet 20 and then passing the exterior sheet between the embossing cutter roll and the anvil cutter roll, thereby applying pressure by the embossing cutter roll. Alternatively, it can be performed by finely cutting an elastic member existing within a predetermined range by heating. In addition, it is preferable to cut | disconnect an elastic member inside 10 mm or more from the edge part of the absorber 13 (or absorptive main body 10).

  In the above-described embodiment, the curved elastic band 26a and the curved elastic band 28a cover substantially the entire triangular areas Trf and Trb. The curved elastic band 26a and the curved elastic band 28a are substantially triangular areas Trf. , The entire Trb is completely covered, and it is not limited to not creating a pocket-like space inside the paper diaper 1 that hinders wearing at all, and if it is a pocket-like space that is a size that does not hinder wearing, It may be formed.

  In the above-described embodiment, the curved elastic band 26a disposed on the front body F side and the curved elastic band 28a disposed on the back body B side intersect with each other in the crotch part 20c. However, the present invention is not limited to this, and the curved elastic band 26a and the curved elastic band 28a may partially intersect each other.

  Moreover, in the paper diaper 1, this invention is not limited to providing both the curved elastic band 26a arrange | positioned at the front body F side, and the curved elastic band 28a arrange | positioned at the back body B side. Any structure provided with a curved elastic band may be used.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a product state external view of the underpants type disposable diaper which concerns on this invention. It is an assembly drawing in the development state of a paper diaper. It is an expanded view of an exterior sheet. 4 is an enlarged view of a main part of a substantially triangular region Trf of a front body F. FIG. 4 is an enlarged view of a main part of a substantially triangular region Trb of a back body B. FIG. It is a top view of an absorptive main part. It is sectional drawing in the VV line of FIG. It is explanatory drawing which shows the state at the time of wear of the underpants type disposable diaper which concerns on this invention. It is a top view which shows the modification of a pants type disposable diaper. It is explanatory drawing which shows the conventional disposable diaper. It is explanatory drawing which shows the conventional disposable diaper. It is explanatory drawing which shows the state at the time of wear of the conventional underpants type disposable diaper.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Paper diaper (pants type disposable diaper), 10 ... Absorbent main body, 13 ... Absorber, 20 ... Exterior sheet, 20c ... Crotch part, 21 ... Joining end, 22 ... Joining end, 24 ... Waist elastic member, 25 ... waist elastic member, 25a ... waist elastic band, 26 ... curved elastic member, 26a ... curved elastic band, 28 ... curved elastic member, 28a ... curved elastic band, 29 ... leg circumference cut line, F ... front body, B ... back body, L ... leg opening, W ... waist opening, Trf ... approximately triangular area (area), Trb ... approximately triangular area (area)

Claims (9)

An absorbent main body including an absorbent body and an exterior sheet integrally provided on the outer surface side of the absorbent main body, and the front body and the rear body of the exterior sheet in a product state are joined ends on both side ends thereof In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed by being joined at
The absorbent main body is provided in a crotch part formed so as to extend in a concave shape outward in the width direction from the absorbent main body over the back body from the front body of the exterior sheet,
The exterior sheet includes a plurality of waist elastic members disposed substantially parallel to each other at intervals in the vertical direction from one joining end to the other joining end in the front body and the back body. An elastic band around the waist, and extending from one joint end of at least one of the front body and the back body to the crotch part side so as to bypass the crotch part and span the other joint end part A curved elastic band comprising a plurality of curved elastic members, and the curved elastic band is surrounded by an edge of the outer sheet, the absorbent main body, and the waist elastic band. A pants-type disposable diaper characterized by being formed so as to substantially cover the whole.   The pants-type disposable diaper according to claim 1, wherein the curved elastic band is provided in the back body.   The pants-type disposable diaper according to claim 1, wherein the curved elastic band is provided in the front body and the back body.   The space | interval of the curved elastic member which comprises the said curved elastic band is made into 20 mm or less in the area | region of the said external sheet surrounded by the edge part of the said exterior sheet, the said absorptive main body, and the said waist elastic band. 3. The pants-type disposable diaper according to any one of 3 above.   In the region of the outer sheet surrounded by the edge of the outer sheet, the absorbent main body, and the waist elastic band, the curved elastic member closest to the leg opening is curved over a region of at least 30 mm in the normal direction. The underpants-type disposable diaper according to any one of claims 1 to 4, wherein an elastic band is formed.   The pants-type disposable diaper according to any one of claims 1 to 5, wherein the curved elastic band is composed of at least four or more curved elastic members.   The area ratio occupied by the area of the curved elastic band is 70% or more in the area of the outer sheet surrounded by the edge of the outer sheet, the absorbent main body, and the waist elastic band. The pants-type disposable diaper described in 1.   The start and end portions of the curved elastic band are disposed in substantially the same range as the range in the width direction of the joint end portions of the front body and the back body where the start and end portions of the waist elastic band are disposed. The pants-type disposable diaper according to any one of claims 1 to 7, wherein The underpants type according to any one of claims 1 to 8, wherein the curved elastic band disposed on the exterior sheet is cut and discontinuous in a range overlapping with the absorber. Disposable diapers.

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