JP4688669B2 - Disposable absorbent pants - Google Patents

Description

  The present invention relates to improvements in disposable absorbent pants such as pants-type disposable diapers.

  Conventionally, as this type of disposable absorbent pants, for example, a waist opening by a back part applied to the back, a front part applied to the abdomen, and a crotch part provided continuously between the back part and the front part. And a pants body configured in a pants shape having openings around the legs and a vertically long absorbent body disposed from the back to the crotch and the front abdomen in the pants body (for example, (See Patent Document 1).

  The pant body includes, for example, an outer layer sheet and an inner layer sheet that are joined together in a polymerized manner and substantially impervious to the outer layer sheet and the inner layer sheet that correspond to the waist around the back portion and the front abdomen. The elastic member for the waist is interposed between the outer layer sheet and the inner layer sheet corresponding to the periphery of the leg, and the elastic member for the leg is interposed between the outer layer sheet and the inner layer sheet. The elastic member for waist circumference is adapted to fit around the waist, and the leg elastic member is adapted to fit around the leg.

  The absorbent body includes a liquid-permeable surface sheet positioned on the skin surface side, a liquid-impermeable back sheet positioned on the non-skin surface side, and a liquid-absorbent core interposed between the surface sheet and the back sheet. The liquid-absorbent core is fixed to the inner surfaces of the top sheet and the back sheet.

  In addition, a stretchable elastic member extending in the longitudinal direction is attached in a stretched state to the opposite surface of the absorbent body to the pant body, and both ends in the longitudinal direction of the absorbent body are fixed to the back and front abdomen, respectively. Structure.

  And in the wearing state of the pants, the remaining part excluding the part fixed to the pant body of the absorbent body is lifted upward by the contraction action of the elastic elastic member in the longitudinal direction in the absorbent body. It can be made to adhere to a person's skin, and it is set as the structure which prevented the leakage of excrement etc. from the crevice which arises between a wearer and an absorber.

JP 2003-62009 A

  However, according to the disposable absorbent pants having the above-described conventional structure, the absorbent body itself is provided with a stretchable elastic member. There was a possibility of causing deterioration of absorption performance of excrement etc. by the sex core.

  Moreover, since the wrinkle by shrinkage etc. has arisen in the absorber itself, since it was closely_contact | adhered to a wearer's skin side, there was a problem that a feeling of tingling was produced and it was inferior to a feeling of fitting.

  Therefore, an object to be solved by the present invention is to provide disposable absorbent pants that can effectively exhibit the absorption performance of excrement and the like and are excellent in fit.

In order to solve the above-mentioned problem, in the invention of claim 1, a pants body having a back part applied to the back part, a front part part applied to the abdomen, and a crotch part provided continuously between the back part and the front part part And a disposable absorbent pant disposed in the pant body and having a longitudinal absorbent body extending from the back part to the crotch part and the front abdomen, wherein the absorbent body is formed only at both longitudinal ends thereof. The pants body is formed in a trunks shape, and the crotch part is extended from the front abdomen of the pant body corresponding to the region where the absorber is disposed. reached as the rear back, a plurality of crotch pulling elastic member for contracting the pant body longitudinally, over the height direction substantially the entire area of the pants body, the pants body laterally And horizontal gather forming elastic member for condensation, but are disposed, the crotch portion pulling elastic member disposed in the central portion, than the crotch portion pulling elastic member disposed on both sides Short .

Moreover, in invention of Claim 2 , in the disposable absorptive pants of Claim 1 , the said underpants main body is provided with the inner-layer sheet | seat and the outer-layer sheet | seat in which the said elastic member for lateral gather formation was interposed, A vertically long lifting sheet member having the crotch lifting elastic member interposed therebetween is firmly fixed to the inner layer sheet, and both longitudinal ends of the absorber are fixed to the lifting sheet member.

Furthermore, in invention of Claim 3 , in the disposable absorbent pants according to Claim 1 or Claim 2 , the absorbent body has an absorbent body portion having liquid absorbency, and a skin surface side of the absorbent body portion. And a back sheet that covers a non-skin surface side opposite to the skin surface side of the absorbent body portion, and the absorbent body body portion does not exist at both longitudinal ends of the absorbent body. Only the portion is formed, and the region of the sheet only portion exists below the region fixed to the front abdomen and the back portion.

In the disposable absorbent pants according to the first to third aspects of the present invention, the absorbent body is fixed to the front abdomen side and the back side only at both ends in the longitudinal direction, and the absorbent body is disposed on the pant body. Since the elastic member for raising the crotch part for contracting the pant body in the vertical direction is arranged from the front abdomen of the pant body through the crotch to the back part corresponding to the region, the crotch When the crotch part of the pants body is pulled up by the contracting action of the elastic member for pulling up the upper part, the absorbent body itself is hardly affected by the contracting action, and therefore the wearer does not cause wrinkles due to shrinkage as in the conventional case. It can be pushed up and applied to the skin side, and has an advantage of excellent fit.

  And since shrinkage | contraction etc. do not arise in absorber itself, there exists an advantage which can prevent deterioration of absorption performance, such as excrement, and can exhibit original absorption performance effectively.

According to the inventions described in claims 1 to 3 , the pants body is provided with a lateral gather forming elastic member for contracting the pants body in the lateral direction over substantially the entire height direction of the pants body. Because of the structure, it is possible to improve the fit by the contraction action in the lateral direction over the entire pant body, and there is an advantage that it can be applied to both wearers with thin legs and wearers with thick legs.

Furthermore, according to the inventions of the first to third aspects, since the pant body has a trunks-type structure, the lateral contraction action over the entire pant body can be secured over a wider range, and the fit is further improved. There is an advantage that improvement can be achieved and it is possible to more effectively deal with both wearers with thin legs and wearers with thick legs.

According to the invention of claim 2 , the pant body includes an inner layer sheet and an outer layer sheet in which a lateral gather forming elastic member is interposed, and the crotch raising elastic member is interposed between the inner and outer sheet materials. A vertically long lifting sheet body is fixed to the entire inner sheet, and both ends in the longitudinal direction of the absorber are fixed to the lifting sheet body. Since the crotch-lifting elastic member is formed as a separate member and fixed, there is an advantage that it can be easily manufactured.

Furthermore, according to the invention described in claim 3 , the absorbent body includes an absorbent body portion having liquid absorbency, a top sheet covering the skin surface side of the absorbent body portion, and the skin of the absorbent body portion. A back sheet that covers the non-skin surface side opposite to the surface side, a region where only the sheet without the absorbent body main body is formed at both ends in the longitudinal direction of the absorbent body, and is fixed to the front abdomen and the back part Since the area of the seat only part exists on the lower side, the crotch part of the pants body is pulled up by the contracting action of the elastic member for raising the crotch part, and the absorbent body is lifted and pressed against the skin side of the wearer When this is done, it is possible to effectively absorb the lifting movement of the absorbent body with only the sheet having a lower rigidity than the part where the absorbent body is present, and uniformly press the part where the absorbent body is present on the skin side of the wearer. Can be applied to improve the fit There is the advantage.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, a disposable pant 1 as an example of a disposable absorbent pant is a back part of a wearer 28 as in the past. A back part 2 applied to the front part, a front part 3 applied to the abdomen, and a crotch part 4 provided continuously between the back part 2 and the front part 3 and applied to the crotch part of the wearer 28 The pants body 5 and the pants body 5 are disposed by being adhered to the pants body 5 with a hot melt adhesive or the like, and have a vertically long absorbent body 6 extending from the back part 2 to the crotch part 4 and the front part 3. Yes.

  And the both-sides edge part 2a of the back part 2 and the both-sides edge part 3a of the front abdominal part 3 in the underpants main body 5 made into the folded state are mutually joined by ultrasonic welding etc., and the junction part 7 is formed here. As shown in FIG. 1, the back portion 2 and the front portion 3 form a circumferential annular waist opening 8 and leg openings 9 on both sides of the crotch portion 4. In the embodiment, the pant body 5 has a so-called trunk shape.

  As shown in FIGS. 3 to 5, the pant body 5 includes an inner layer sheet 11 and an outer layer sheet 12 that are joined together in a polymerized manner by a hot melt adhesive or the like. The elastic members 13 for forming a lateral gather for contracting the pant body 5 in the horizontal direction over the substantially entire height direction of the pant body 5 between each other are in a stretched state with appropriate intervals in the height direction. It is set as the structure arrange | positioned by.

  That is, between the inner layer sheet 11 and the outer layer sheet 12 over the entire region in the height direction around the waist and abdomen and around the legs of the pant body 5 is used for forming a waist gather as an elastic member 13 for forming a lateral gather. An elastic member 13a, a body gather forming elastic member 13b, and a leg gather forming elastic member 13c are interposed in an expanded state, and a waist gather forming elastic member 13a, a body gather forming elastic member 13b, and a leg gather forming elasticity. By the expansion and contraction action of the member 13c, a waist gathering portion 15, a body gathering portion 16 and a leg gathering portion 17 that flexibly fit around the waist, abdomen and legs are configured.

  In the present embodiment, both end portions of the outer layer sheet 12 are provided with folded piece portions 12a that are folded back toward the inner layer sheet 11, and the waist gather forming elastic member 13a is formed between the outer layer sheet 12 and the folded piece portions 12a. It is set as the structure arrange | positioned over the whole width direction in the underpants main body 5 between. Further, the body gather forming elastic member 13b and the leg gather forming elastic member 13c are disposed in a portion of the pant body 5 excluding the region where the absorbent body 6 is arranged, and the leg gather forming elastic member 13c. In a part, as shown in FIG. 2, the structure is arranged along a notch 9 a for forming the leg-hole opening 9.

  Further, between the inner layer sheet 11 and the outer layer sheet 12 of the pant body 5 corresponding to the region where the absorbent body 6 is disposed, an appropriate number of crotch portions from the front abdominal portion 3 through the crotch portion 4 to the back portion 2 are provided. The pulling elastic member 19 is interposed in an extended state, and the pant body 5 is contracted in the vertical direction by the contracting action of the crotch pulling elastic member 19 to pull up the crotch part 4 of the pant body 5. . At this time, in the present embodiment, the crotch-lifting elastic members 19 disposed on both side portions are disposed over substantially the entire length of the region where the absorber 6 is disposed, whereas the elastic members 19 are disposed in the central portion. Each of the crotch-lifting elastic members 19 is arranged to be short.

  And the inner layer sheet | seat 11 and the outer layer sheet | seat 12 are formed with water-repellent nonwoven fabrics, hydrophilic nonwoven fabrics, etc., such as a spun bond nonwoven fabric. Moreover, as each elastic member 13a, 13b, 13c, 19, the elastic elastic material (polyurethane thread | yarn, a polyurethane film, natural rubber etc.) normally used for a disposable diaper is used, and it is a hot-melt-adhesive agent, heat welding in an expansion | extension state, It is set as the structure stuck on each predetermined site | part by sticking means, such as ultrasonic welding.

  As shown in FIGS. 3 to 5, the absorbent body 6 includes a liquid absorbent mat body 20 as a liquid absorbent main body and an outer surface side of the liquid absorbent mat body 20, that is, a non-skin surface side. A back sheet 21 that covers the lower surface (in the drawing) and a top sheet 22 that covers the skin surface side (upper side in the drawing) of the liquid-absorbing mat body 20, and has a structure molded into a predetermined shape. Yes.

  The top sheet 22 is made of a liquid-permeable nonwoven fabric, and the back sheet 21 is made of a liquid-impervious or water-repellent nonwoven fabric, a liquid-impervious plastic film, or the like. In addition, the liquid absorbent mat body 20 is formed by, for example, covering a lump obtained by mixing a granular polymer absorber with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber, or paper such as tissue paper or liquid permeable nonwoven fabric. It is structured to be wrapped in a sheet and molded into a predetermined shape.

  Further, side sheets 23 are bonded to both sides of the absorbent body 6 in the width direction on the skin surface side along the longitudinal direction by a hot-melt adhesive or the like, and the inner edge of each side sheet 23 is A three-dimensional gather forming elastic member 24 is interposed in an extended state. And the three-dimensional gather part 25 which stands up inward so that it may be flexibly pressed on a wearer's skin side by the expansion-contraction action of these elastic members 24 for three-dimensional gather formation is comprised.

  The side sheet 23 is made of a liquid-impervious non-woven fabric and the like, and the elastic member 24 for forming a three-dimensional gather is made of the same elastic material as the elastic members 13a, 13b, 13c, and 19 and is similarly hot-melt bonded. It is set as the structure stuck on a predetermined site | part by an agent etc.

  The absorbent body 6 configured as described above is configured to be fixed to the rear back part 2 and the front abdomen 3 on the inner surface side of the pant main body 5 with a hot melt adhesive 26 or the like only at both ends in the longitudinal direction. Accordingly, except for the fixed portion, a gap is formed between the absorbent body 6 and the pant body 5, and the pant body 5 and the absorbent body 6 are relatively movable. .

  Further, as shown in FIGS. 2 and 5, both end portions of the outer layer sheet 12 are folded and joined to the upper surface side of the end portion of the inner layer sheet 11 in a polymerized manner. It is set as the structure where it was covered by each folding piece part 12a so that the both-ends edge part of the absorber 6 stuck might not contact skin directly.

  The present embodiment is configured as described above. When the disposable pants 1 are worn, each waist gather forming elastic member 13a, each body gather forming elastic member 13b, each leg gather forming elastic member 13c. The elastic members 24 for forming the three-dimensional gathers are structured to adhere well to the skin side of the wearer 28 around the waist, abdomen and legs.

  In particular, since the elastic members 19 for raising the crotch portion are disposed in an extended state corresponding to the region where the absorbent body 6 is arranged in the pant body 5, the contracting action of the elastic members 19 for raising the crotch portion is provided. As a result, the pulling action of the crotch part 4 in the pant body 5 is generated, and the absorbent body 6 disposed inside is pushed up by the pulling action of the crotch part 4 and pressed against the skin side of the wearer 28.

  Further, each of the crotch-lifting elastic members 19 disposed in the central portion has a structure that is disposed shorter than the other crotch-lifting elastic members 19 on both the left and right sides thereof, so that the absorber 6 The force that pushes up can be strengthened.

  At this time, the absorbent body 6 is fixed to the pant body 5 only at both ends in the longitudinal direction, and in other parts, the absorbent body 6 and the pant body 5 have a so-called edge-cut structure, Even if the pants body 5 is wrinkled due to shrinkage due to the contracting action of the elastic member 19 for raising the crotch part, the absorbent body 6 itself is hardly affected by the contracting action, and therefore the conventional absorbent body itself has an elastic member. Since it can be pushed up and applied to the skin side of the wearer 28 without causing any shrinkage or wrinkle due to the arrangement, there is no feeling of gore, excellent fit, leakage prevention and good wearing There is an advantage that a feeling can be obtained.

  In addition, since no shrinkage or the like occurs in the absorbent body 6 itself, it is possible to secure a good absorption region for excrement and the like by the liquid absorbent mat body 20, thereby preventing deterioration in absorption performance of the excrement and the like. There is an advantage that the original absorption performance can be effectively exhibited.

  Further, the waist gather forming elastic member 13a, the body gather forming elastic member 13b, and the leg gather forming elastic member 13c for contracting the pant body 5 in the lateral direction over substantially the entire height direction of the pant body 5. Since the gather forming elastic member 13 is arranged, the fit property can be improved by the contraction action in the lateral direction over the entire pant body 5, and the elastic member is arranged only around the periphery of the leg opening as in the prior art. Compared with the structure of the conventional structure, since the pants body 5 is formed in a trunks shape, the pants body 5 is formed as a whole. Can be ensured over a wide range, further improving the fit, and the wearer's 28 legs are thin and thick. Razz, the more effectively accommodate, there is an advantage that even leakproof attained effectively.

  Further, even if the pant body 5 and the absorbent body 6 can be moved relative to each other in the vicinity of the crotch part 4, the pant body 5 is formed as a trunks type, so there is no risk of protruding from the leg opening 9 and the appearance is good. Good. Therefore, even when an exchangeable urine collecting pad is used, the protrusion from the leg opening 9 can be effectively prevented.

<Second Embodiment>
6 and 7 show a second embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the pant body 5 is for lateral gathers formation comprising the waist gather forming elastic member 13a, the body gather forming elastic member 13b, and the leg gather forming elastic member 13c as in the first embodiment. Corresponding to the arrangement region of the absorbent body 6 in the trunks-type pant main body 5a composed of the inner layer sheet 11 and the outer layer sheet 12 which are joined to each other with the elastic member 13 interposed therebetween, hot melt bonding It is set as the structure provided with the sheet | seat 5b for raising pulled up entirely with the agent.

  The lifting sheet 5b is in an unfolded state as shown in FIG. 2 and includes an inner sheet 30 and an outer sheet as inner and outer sheets made of a vertically long non-woven fabric having the same area as that of the absorbent body 6 in plan view. 31 and an appropriate number of crotch-lifting elastic members 19 arranged in the same manner as in the first embodiment are interposed between the inner sheet material 30 and the outer sheet material 31 in a hot state. The structure is joined by a melt adhesive or the like. Therefore, it is set as the structure which exhibits the effect | action which raises the crotch part 4 of the underpants main body 5 similarly to 1st Embodiment by the contraction effect | action of the elastic member 19 for crotch part raising.

  And it is set as the structure where the longitudinal direction both ends of the absorber 6 were adhere | attached with the hot-melt-adhesive 33 etc. to the longitudinal direction both ends of the inner sheet | seat material 30 in this sheet body 5b for raising. Other structures are the same as those in the first embodiment.

  Therefore, in this embodiment, the same effect as that of the first embodiment is obtained, and the pant main body 5a in which the lateral gather forming elastic member 13 is interposed and the pulling in which the crotch pulling elastic member 19 is interposed. Since the sheet body 5b is composed of a separate member and then fixed, the respective structures can be simplified, and the pant body main part 5a and the lifting sheet body 5b can be easily manufactured.

  Further, in a state where the lifting sheet body 5b is fixed to the absorbent body 6 in advance, the outer sheet material 31 of the lifting sheet body 5b is fixed to the entire inner layer sheet 11 of the unfolded pant body main portion 5a, thereby disposing the disposable pants. 1 can be manufactured, and there is an advantage that the manufacturing procedure can be widened.

<Third Embodiment>
FIG. 8 shows a third embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the liquid absorbent mat body 20 does not exist at both longitudinal ends of the back sheet 21 covering the non-skin surface side opposite to the top sheet 22 covering the skin surface side of the liquid absorbent mat body 20. Only the sheet in which the top sheet 22 and the back sheet 21 are joined in a polymerized manner is formed to have a longer portion 35.

  And in the state which the sheet | seat only part 35 in the longitudinal direction both ends of the absorber 6 was fixed to the front abdominal part 3 or the back part 2 with the hot-melt-adhesive 26 etc., only a sheet | seat is also below the fixed area | region. The region 35 has a region. Other structures are the same as those in the first embodiment.

  Accordingly, in this embodiment, the same effect as in the first embodiment is obtained, and the crotch portion 4 of the pant body 5 is pulled up by the contraction action of the crotch pulling elastic member 19 disposed in the pant body 5. When the absorbent body 6 is lifted and pressed against the skin side of the wearer 28 by the lifting action of the crotch part 4, the sheet 6 has only a sheet portion 35 that is less rigid than the portion where the liquid absorbent mat body 20 exists. The lifting movement can be absorbed effectively, and the occurrence of wrinkles and the like due to lifting at the portion where the liquid-absorbing mat body 20 is present can be effectively prevented. There is an advantage that it can be uniformly pressed to the surface and the fit feeling can be further improved.

<Other configurations>
In each of the above embodiments, the side gather forming elastic member 13b or the leg gather forming elastic member 13c is provided in a portion corresponding to the region where the absorbent body 6 is disposed in the pant body 5. Although the structure in which 13 is not shown is shown, a structure in which the elastic member 13 for forming the lateral gathers is provided over the entire width direction.

  Moreover, although the trunks type thing is shown as the disposable pants 1, what is called a brief type thing may be used.

  Furthermore, the length, the number, and the like of the elastic members 13 for forming the lateral gathers and the elastic members 19 for raising the crotch part disposed in the pant body 5 are not limited to the embodiments, and may be determined as necessary.

It is a perspective view of the disposable pants which concern on the 1st Embodiment of this invention. FIG. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. It is a cross-sectional side view. It is sectional drawing of the crotch part of the disposable pants which concern on 2nd Embodiment. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is a section side view of disposable pants concerning a 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable pants, 2 Rear back part, 3 Front abdomen part, 4 Crotch part, 5 Pant body, 5a Pant body main part, 5b Lifting sheet body, 6 Absorbent body, 11 Inner layer sheet, 12 Outer layer sheet, 13 Elasticity for forming lateral gathers Member, 19 elastic member for raising crotch part, 20 liquid absorbent mat body, 21 back sheet, 22 top sheet, 23 side sheet, 26 hot melt adhesive, 28 wearer, 30 inner sheet material, 31 outer sheet material, 33 hot Melt adhesive, 35 sheet only part.

Claims (3)

A pant body having a back part applied to the back part, a front part applied to the abdomen part, and a crotch part provided between the back part and the front part of the abdomen, and being arranged in the pant body and crotch from the back part In the disposable absorbent pants comprising a vertically long absorbent body extending over the front and the abdomen,
The absorber is fixed to the front abdomen side and the back part side only at both longitudinal ends thereof,
The pants body is formed in a trunks shape,
In the pant body,
A plurality of elastic members for raising the crotch part for contracting the pant body in the longitudinal direction from the front abdomen of the pant body corresponding to the region where the absorber is disposed to the back part through the crotch part,
An elastic member for forming a lateral gather for contracting the pant body in the lateral direction over substantially the entire height direction of the pant body;
Is arranged ,
Disposable absorbent pants characterized in that the crotch-lifting elastic member disposed in the center is shorter than the crotch-lifting elastic member disposed on both sides . In the disposable absorbent pants according to claim 1,
The pant body includes an inner layer sheet and an outer layer sheet in which the elastic member for forming the lateral gathers is interposed, and a vertically long lifting sheet body in which the crotch lifting elastic member is interposed between the inner and outer sheet materials is the inner layer. Disposable absorbent pants, characterized in that the entire surface is fixed to a sheet, and both longitudinal ends of the absorber are fixed to the lifting sheet. In the disposable absorbent pants according to claim 1 or 2,
The absorber includes an absorbent main body having liquid absorbency, a top sheet covering the skin surface side of the absorber main body, and a back covering the non-skin surface side opposite to the skin surface of the absorber main body. With seats,
At the both ends in the longitudinal direction of the absorbent body, only the sheet portion where the absorbent body main body does not exist is formed, and the region of the sheet only portion exists below the region fixed to the front abdomen and the back portion. Disposable absorbent pants characterized by.

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