JP2005021708A - Disposable wearing article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent leakage of body fluid from a separation position of the crotch area, when a leg surrounding elastic member of a disposable wearing article comprises the first elastic member positioned in the front half and the second elastic member positioned in the back half separated in the crotch region. <P>SOLUTION: A leg surrounding elastic member of this disposable wearing article comprises a first arc elastic member 15 positioned mainly at the front half of a leg surrounding portion 14, a second arc elastic member 16 positioned mainly at the back half, and a third and fourth elastic member 17A, 17B crossing the first and second elastic members 15, 16 at the center portion of a crotch region 8. The first to fourth elastic members surround the leg surrounding portion 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to disposable wearing articles such as disposable diapers and training pants.

  Conventionally, attaching an elastic member along the leg circumference part of these wearing articles, and making this part contact | adhere to a wearer's leg circumference is known as a conventional technique. Further, a technique in which an elastic member of a wearing article based on such a technique is constituted by a first elastic member attached to the front half of the leg periphery and a second elastic member attached to the rear half is US Pat. No. 4,897,084. No. (Patent Document 1) and Japanese Patent Laid-Open No. 3-186263 (Patent Document 2). Using these known techniques, different conditions can be adopted for each of the front half and the latter half of the leg periphery, such as the types of elastic members, the number of them used, the spacing, and the contraction force. It is possible to obtain a worn article excellent in the feeling of wearing and the leak-proof property of body fluid.

  Patent Document 1 teaches that in a disposable diaper, the first elastic member is attached so as to draw a U shape from the front half around the left leg to the front half around the right leg through the crotch area, The second elastic member is attached so as to draw an inverted U shape from the rear half to the rear half of the right leg through the crotch area, and without crossing the first elastic member and the second elastic member in the crotch area. They can be separated by the required dimensions.

FIG. 5 is a plan view showing a state in which the first and second leg-around elastic members 15 and 16 are attached to the back sheet 12 of the disposable diaper in a U-shape and an inverted U-shape based on the known technique. The first and second elastic members 15 and 16 are separated by a distance D in the front-rear direction center of the crotch region 8.
US Pat. No. 4,897,084 Japanese Patent Laid-Open No. 3-186263

  In the diaper having the back sheet 12 of FIG. 5, when the front area 6 and the rear area 7 are overlapped, the first and second elastic members 15, 16 form a substantial loop and closely adhere to the wearer's legs. It becomes possible. However, since the first and second elastic members 15 and 16 are separated from each other at the central portion of the crotch region 8, there is a problem that the vicinity of the portion hardly adheres to the periphery of the leg and body fluid easily leaks therefrom. The crotch area 8 is a place where body fluid excretion is particularly concentrated, and the problem cannot be neglected.

  In order to solve such a problem, the contraction force of the elastic member may be increased. However, such a solution solves the problem of the region, while causing problems such as obstructing blood circulation around the leg and impairing the wearing feeling of the article, and thus cannot be a complete solution. .

  This invention attaches the 3rd and 4th elastic member which can be expanded and contracted in the front-back direction of a wearing article so that the 1st elastic member and the 2nd elastic member along the front half and back half of a leg circumference part may intersect, and these It is an object of the present invention to solve the above problem by surrounding the leg periphery with the first, second, third and fourth elastic members.

  The present invention uses the following means to solve the above problems.

  The present invention is premised on the means that the top sheet, the back sheet, the leg peripheral portion that is recessed in an arc shape on both sides of the crotch area located between the front and rear areas of the both sheets, and the leg A disposable wearing article including a series of first and second elastic members and third and fourth elastic members each having both side portions and a central portion therebetween for enclosing a surrounding portion.

  According to the present invention, based on the premise, the central portion of the first elastic member crosses the crotch region, and the both side portions of the first elastic member are arranged on the leg peripheral portion in the substantially front half of each of the leg peripheral portions. The center portion of the second elastic member is disposed in a stretchable manner along the vicinity of the edge, and is parallel to the center portion of the first elastic member and is spaced apart in the longitudinal direction of the article and crosses the crotch region. The both side portions of the second elastic member are extendable along the vicinity of the edge of the leg periphery in substantially the rear half of each of the leg periphery, and the third and fourth elastic members are in the crotch region. It is characterized in that it is located on both sides so as to be stretchable in the longitudinal direction of the article and intersects the both sides of the first and second elastic members.

  In an embodiment of the present invention, a liquid-absorbing core is interposed between the top sheet and the back sheet, and the third and fourth elastic members are spaced apart from the side edge of the core by 5 mm or more. Including that.

  According to the disposable wearing article according to the present invention, the third and fourth elastic members extending in the longitudinal direction on each of the first and second elastic members attached so as to draw an arc on the front half and the rear half of the leg periphery. Since the legs are surrounded by the legs and stretched in the direction around the legs, even if the central parts of the first and second elastic members are separated from each other in the crotch area, body fluid leaks from the parts. Can be prevented.

  According to the embodiment in which a liquid-absorbing core is interposed between the top sheet and the back sheet, and the third and fourth elastic members are separated from the side edge of the core by 5 mm or more outward, depending on the rigidity of the core It is possible to prevent the expansion and contraction of the third and fourth elastic members from being hindered.

  The details of the disposable wearing article according to the present invention will be described below with reference to the accompanying drawings, taking a disposable pants-type diaper as an example.

  FIG. 1 is a perspective view of a disposable pants-type diaper 1 in a worn state, but illustration of the wearer is omitted. The diaper 1 has a waist opening 2 and a pair of left and right leg openings 3. A waist elastic member 4 and a leg elastic member 5 are provided along the openings 2 and 3. The front and rear sections 6 and 7 of the diaper 1 overlap each other on both the left and right sides, and are united at a joining line 9.

  FIG. 2 is an exploded perspective view of the diaper 1 shown by cutting the diaper 1 along the joining line 9 and extending the diaper 1 back and forth. The diaper 1 includes a liquid-permeable top sheet 11, a liquid-impervious back sheet 12, and a liquid-absorbent core 13 interposed between the two sheets 11 and 12. The top sheet 11 and the back sheet The portion extending from the periphery of the core 13 is watertightly bonded to the core 13, and the core 13 is intermittently bonded to at least one of the sheets 11 and 12. The diaper 1 is constituted by front and rear sections 6 and 7 and a crotch section 8 interposed between the sections in the longitudinal direction, and leg leg portions 14 formed of arcuate recesses are formed on both left and right sides of the crotch section 8. The first, second, third and fourth elastic members 15, 16, 17A, 17B for the legs are formed on the inner surface of the back sheet 12 facing the top sheet 11 by a hot melt adhesive (not shown). It is installed. Each of the first, second, third, and fourth elastic members 15, 16, 17A, and 17B is made of one or more elastic ribbons, and the first and second elastic members 15, 16 are at least around the legs. Arc-shaped portions (both side portions) 15A and 16A extending along the portion 14 extend, and the central portions 15B and 16B are spaced apart from each other in the crotch region 8 in the longitudinal direction of the diaper 1, and the third and fourth elastic members 17A and 17B are in the state of extending in the same direction.

  FIG. 3 is a plan view showing the inner surface of the back sheet 12 and clarifies the attachment state of the first, second, third and fourth elastic members 15, 16, 17A, 17B. The first elastic member 15 is a series of both side portions 15A and a central portion 15B therebetween, and the central portion 15B of the first elastic member 15 crosses the crotch region 8 and both sides of the first elastic member 15 The portion 15A is positioned so as to be expandable and contractable along the vicinity of the edge of the leg periphery in the substantially front half of each of the leg periphery. Further, the second elastic member 16 is a series of both side portions 16A and a central portion 16B therebetween, and the central portion 16B of the second elastic member 16 crosses the crotch region 8 and the second elastic member 16. Both side portions 16A of the leg periphery portion 14 are positioned so as to be extendable and retractable along the vicinity of the edge of the leg periphery portion in substantially the rear half of each of the leg periphery portions 14. The first and second elastic members 15 and 16 draw an inverted U-shape and a U-shape at the center of the crotch region 8 and are separated from each other by a distance D. The third and fourth elastic members 17A and 17B extend in the longitudinal direction of the diaper 1 at both sides of the crotch region 8, and both sides 15A of the first and second elastic members 15 and 16 at both sides of the crotch region 8. , 16A and intersecting points 22A, 22B, 23A, 23B are formed. These first, second, third and fourth elastic members 15, 16, 17 </ b> A, 17 </ b> B surround the leg periphery 14.

  Thus, the extended diaper 1 to which the first, second, third, and fourth elastic members 15, 16, 17A, 17B are attached has a top sheet 11 along a center line XX that bisects the front-rear direction. Are folded in two and joined at the joining line 9, the left and right leg surrounding portions 14 form the leg surrounding openings 3, and the outer end portions 15 </ b> C and 15 </ b> D of the first elastic member 15 and the second elastic member 16 outer end portions 16C and 16D substantially overlap each other, and the first and second elastic members 15 and 16 and the third and fourth elastic members 17A and 17B can substantially extend and contract in the direction around the wearer's leg. A leg-hole elastic member 5 made of a simple loop is formed (see FIG. 1).

  FIG. 4 is a plan view similar to FIG. 3 and shows an example in which the elastic sheet 17 is used instead of the third and fourth elastic members 17A and 17B. The stretchable sheet 17 extends in the longitudinal direction of the diaper 1 and is joined to the inner surface of the backsheet 12, and the left and right side edges thereof are formed on both side portions 15A and 16B of the first and second elastic members 15 and 16. Crossed. In the crotch area 8, the range where the elastic sheet 17 is joined can be contracted in the vertical direction of the diaper, and can be in close contact with the wearer's crotch portion to effectively prevent side leakage of body fluid.

  In the wearing article according to the present invention, when the liquid-absorbent core 13 is used as in the embodiment, the member is arranged so that the expansion and contraction of the third and fourth elastic members 17A and 17B is not hindered by the rigidity of the core 13. The attachment positions of 17A and 17B need to be appropriately separated outward from the side edge of the core 13, and the separation distance is preferably 5 mm or more. As illustrated in FIG. 3, the first and second elastic members 15 and 16 are not necessarily required to cross the crotch region 8 from left to right, but are cut at the crotch region 8. That is, the central portions 15B and 16B may be cut between the intersections 22A and 22B and between the intersections 23A and 23B, or may not exist there. In any case, the first and second elastic members 15 and 16 have outer end portions 15C, 15D, 16C, and 16D in the upper part of the leg periphery opening 3 or the leg periphery portion 14, and the leg periphery opening 3 or The inner end portions 15E, 15F, 16E, and 16F are provided in the lower portion of the leg periphery portion 14, but the first elastic member 15 and / or the second elastic member 16 cross the crotch region 8. In some cases, the part where the members 15 and 16 are moved away from the respective leg-hole openings 3 and begin to advance in the direction of the center line that bisects the diaper 1 left and right can be referred to as the inner end portion. In the embodiment, the inner end portion is located at the center portion in the front-rear direction of the crotch region 8, but it is also possible to offset it toward either the front or rear. These first, second, third, and fourth elastic members 15, 16, 17A, and 17B are usually attached to the inner surface of the backsheet 12, but they may be attached to the topsheet 11, or the first and second The elastic members 15 and 16 and the third and fourth elastic members 17A and 17B may be attached to different top sheets 11 or back sheets 12.

  Conventional materials in the technical field can be used for the wearing article according to the present invention. For joining and mounting for assembling these materials, a well-known joining technique or heat fusion technique can be used.

The perspective view of a disposable diaper (disposable wearing article). The disassembled perspective view of the disposable diaper extended back and forth. The top view of a back seat | sheet. The top view of the back seat | sheet part which shows other embodiment. The top view similar to FIG. 3 which illustrates the disposable diaper of a prior art.

Explanation of symbols

1 Disposable diaper (disposable wearing article)
5 Leg elastic member 6 Front area 7 Rear area 8 Crotch area 11 Top sheet 12 Back sheet 13 Core 15 First elastic member 15A Both side parts 15B Central part 16 Second elastic member 16A Both side parts 16B Central part 17A Third elastic member 17B Fourth elastic member

Claims (2)

A top sheet, a back sheet, a leg periphery recessed in an arc shape on both sides of a crotch area located between the front and rear sections of both sheets, and both sides and the center between them to surround the leg periphery In a disposable wearing article comprising a series of first and second elastic members and third and fourth elastic members each having a portion,
The central portion of the first elastic member crosses the crotch region, and the both side portions of the first elastic member can be expanded and contracted along the vicinity of the edge of the leg surrounding portion in the substantially front half of each of the leg surrounding portions. And the center part of the second elastic member is parallel to the center part of the first elastic member and is spaced apart in the longitudinal direction of the article and crosses the crotch region, and the both sides of the second elastic member. And the third and fourth elastic members are arranged in the longitudinal direction of the article on both sides of the crotch area. The article is characterized in that the article is located so as to be stretchable and intersects the both side portions of the first and second elastic members.   The article according to claim 1, wherein a liquid-absorbing core is interposed between the top sheet and the back sheet, and the third and fourth elastic members are separated from the side edge of the core by 5 mm or more outward.

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