JP2006102001A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which nicely fits a crotch region of a wearer and is excellent in a leak prevention effect on the excrement. <P>SOLUTION: The absorbent article includes a liquid-permeable surface sheet, a liquid-impermeable back sheet and a first absorber disposed between those two sheets, wherein a crotch region of the absorber 4 is formed to be narrow in width, a pair of sheet members 8 and 8 having the width to cover from the vicinity of both side edges formed with the narrow width of the first absorber to the vicinity of both side edges in a longitudinal direction of the absorbent article is disposed to extend in the longitudinal direction of the absorbent article 1 at least in the crotch region on the surface sheet 2, the pair of the sheet members is so constituted that the side edge sections located at both the side edge sections of the absorbent article and both the end sections in the longitudinal direction are connected on the surface sheet, and the side edge sections located at the central side of the absorbent article are free edges in the non-connected situation, and a second absorber 9 is disposed on the sheet members 8 and 8 in at least the crotch region. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to absorbent articles such as disposable diapers and urine pads. More specifically, the present invention relates to an absorbent article having excellent fit in the crotch region and excellent excrement leakage prevention effect.

  Absorbent articles such as disposable diapers are basically formed from a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets, and are excreted when worn. The urine or other excrement is retained on the absorbent body via a liquid-permeable top sheet, and the liquid-impermeable back sheet prevents the excrement from leaking out of the absorbent article. Yes. And various forms, such as a deployment type and a pants type, have been proposed so that they can be suitably used according to the application, and are widely used by infants and other adult incontinent persons.

  Absorbent articles such as disposable diapers are generally made of a non-woven fabric having breathability and water repellency along the left and right longitudinal side edges in order to enhance the effect of preventing excrement leakage. A three-dimensional gather standing up toward the skin is formed.

Furthermore, recently, in order to improve the leakage prevention effect more reliably, the disposable diaper (Patent Document 1, Patent Document 2, Patent Document 3) with an absorbent body attached to a three-dimensional gather, or the position of the crotch part of the absorbent body The disposable diaper (patent document 4) etc. which formed the recessed part which accommodates excrement are proposed.
Japanese Patent Laid-Open No. 3-218751 JP-A-4-150853 JP-A-11-99174 JP-A-8-191857

  However, in the case of a disposable diaper with an absorbent body attached to a three-dimensional gather, the width of the absorbent body in the crotch region is wide, and the thickness of the absorbent body is also thick and rigid. Sometimes worsened and sometimes caused excrement leakage. Furthermore, in the case of a disposable diaper in which a recess for accommodating excrement is formed at the position of the crotch region of the absorber, the absorber in the crotch region needs to be wide, thick, and rigid, When worn, the fit in the crotch region may deteriorate, and excrement may leak.

  The present invention overcomes the problems of the above-mentioned conventional absorbent articles such as disposable diapers, and provides an absorbent article that fits well to the wearer's crotch region when worn and has an excellent effect of preventing excrement leakage. Is.

  The present invention for solving the problems of the conventional absorbent article includes the following inventions.

(1) It has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a first absorbent body disposed between the two sheets, a front body, a back body, and these front and back bodies In an absorbent article consisting of a crotch region located between
The first absorbent body is formed in a narrow width in the crotch region, and is absorbed from the vicinity of both side edges formed in the narrow width of the first absorbent body on at least the top sheet in the crotch region. A pair of sheet members having a width reaching the vicinity of both side edges in the longitudinal direction of the absorbent article are arranged extending in the longitudinal direction of the absorbent article, and the pair of sheet members includes side edge portions located on both side edges of the absorbent article. Both longitudinal ends are joined on the top sheet, and the side edge located on the center side of the absorbent article is a non-joined free edge,
Furthermore, at least in the crotch region, the absorbent article is characterized in that a second absorbent body is disposed on the sheet member.

(2) The inseam region of the absorbent article is a low-rigidity region in which at least one third of the width direction is deformable following the movement of the wearer. Absorbent article.

(3) The absorbent article according to (1) or (2), wherein the first absorbent body and / or the second absorbent body is a thin flexible absorbent body.

(4) Any one of the items (1) to (3), wherein the first absorbent body is slit-embossed along the longitudinal direction at least in the crotch region. Absorbent article as described in 1.

(5) A stretchable elastic member is disposed in an expanded state at least in the crotch region between the topsheet and the backsheet and / or between the first absorber and the backsheet ( The absorbent article according to any one of items 1) to (4).

(6) The absorbent article according to any one of items (1) to (5), wherein solid gathers are disposed at at least both side edges in the longitudinal direction of the crotch region of the absorbent article. .

(7) The absorption according to any one of (1) to (6), wherein a stretchable elastic member is arranged in an extended state at least in a crotch region at a free edge of the sheet member. Sex goods.

(8) Any of (1) to (7) above, wherein the pair of sheet members are integrally structured sheet members in which both the sheet members are integrated in a region on both ends in the longitudinal direction. The absorbent article of Claim 1.

(9) Item (1) to Item (8), wherein the sheet member is formed of two webs, and the second absorbent body is disposed between the two webs. The absorbent article according to any one of the above.

(10) The absorbent article according to item (9), wherein the two webs forming the sheet member are hydrophilic liquid-permeable webs.

(11) Of the two webs forming the sheet member, the web located on the first absorbent body side is a water-repellent web.

  In the absorbent article of the present invention, the first absorbent body constituting the absorbent article is formed with a narrow width in the crotch region, and is formed with a narrow width of the first absorbent body on the top sheet. A pair of sheet members extending in the longitudinal direction of the absorbent article extends from the vicinity of both side edges to the vicinity of both side edges in the longitudinal direction of the absorbent article, and a second absorbent body is disposed on the sheet member.

  When the absorbent article of the present invention having such a configuration is worn, the first absorbent body is formed with a narrow width, and the crotch region follows and deforms according to the body shape and movement of the wearer. Therefore, the fit is good in the crotch region. Further, when worn, the absorbent article is curved toward the clothing side in the crotch region, and a pocket structure is formed between the absorbent and the seat member, so that excrement can be easily stored, and further, excrement is stored in the pocket structure. Even if not, it is absorbed by the second absorber disposed on the sheet member forming the pocket structure, so that the leakage prevention effect can be improved more reliably.

  In the case of the absorbent article of the present invention, at least one third of the crotch region in the width direction is made a flexible region with a low stiffness material, and the first absorber is a thin absorber, The absorbent body is subjected to continuous or discontinuous embossing in the longitudinal direction, and the elastic member is disposed between the top sheet and the back sheet and / or between the first absorbent body and the back sheet, or the pocket structure. A pocket structure can be easily formed, for example, by arranging the stretchable elastic member in a stretched state on the side edge portion on the free edge side of the sheet member forming the above, and the above effect can be further enhanced.

Hereinafter, the absorbent article of the present invention will be described in detail by taking a disposable diaper as an example with reference to the drawings. However, the present invention is not limited to these in any way.
FIG. 1 is a partially cutaway plan view showing a disposable diaper that is an absorbent article of the present invention.
In FIG. 1, a disposable diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a first absorbent body 4 disposed between the two sheets. 5, a back body 6, and a crotch region 7 positioned between the two body parts.

  The first absorbent body 4 is formed with a narrow width in the crotch region 7, and the diaper 1 is formed on the top sheet 2 from the vicinity of both side edges formed with the narrow width of the first absorbent body 4. The side edge of the first absorber near the side edges (center side) is a free edge, and the opposite side edge is bonded to the top sheet. A pair of sheet members 8 that are fixed portions are arranged so as to extend to both ends in the longitudinal direction of the diaper or in the vicinity thereof, and the second absorbent body 9 is disposed on the pair of sheet members 8.

  Further, in the diaper 1, elastic members 10 around the legs are arranged at both side edges in the crotch region 7, elastic members 11 around the waist are arranged in the end region of the back body 6, A fastening tape 12 is arranged at the edge, and a front patch 13 for joining the fastening tape 6 to the surface of the back sheet 3 of the front body 5 is arranged.

FIG. 2 shows an example different from FIG. 1 and is a partially cutaway plan view showing the disposable diaper of the present invention. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description of the overlapping parts is omitted.
In FIG. 2, a sheet member 8 composed of a single sheet is disposed on the top sheet 2, and the first absorbent body 4 is formed with a narrow width at the longitudinal center of the crotch region 7 of the sheet member 8. A rectangular opening 14 is formed along the vicinity of the both side edges formed between the side edges of the opening 14 of the sheet member 8 and the side edges on the outside of the sheet portion 8. A second absorber 9 is disposed in the longitudinal direction.

  FIG. 2 shows an example in which the second absorbent body 9 is disposed on both side edges of the opening 14 of the sheet member 8. However, the second absorbent body is disposed so as to surround the opening 14 and the opening of the sheet member 8. You may arrange | position to the whole circumference circle.

FIG. 3 is a cross-sectional view showing a state in which the disposable diaper 1 of the present invention shown in FIG. 1 is cut along line XX. In FIG. 3, the disposable diaper 1 includes a top sheet 2, a back sheet 3, and a first absorber 4 disposed between the front and back sheets 2, 3. The sheet member 8 is arranged from the both side edges of the absorbent body 4 to the vicinity of the region where the elastic members 10 around the legs on the both side edges of the diaper 1 are arranged, and the outer side edge of the diaper 1 of the sheet member 8 That is, the side edge portion on the side where the leg-around elastic member 10 is disposed is joined to the topsheet 2, and the side edge portion on the central portion side of the diaper 1, that is, the side edge portion on the first absorbent body 4 side. In the non-bonded state, it is a free edge. Further, the second absorbent body 9 is disposed on the sheet member 8 so as to be wrapped with the sheet member 8.

  FIG. 3 shows an example in which the sheet member 8 is formed of a single web, and the second absorbent body 9 is arranged so as to be wrapped by the web. And the second absorbent body may be disposed between the two webs. In this case, both of the two webs may be hydrophilic, or the web located on the first absorber side may be water repellent.

4 is a cross-sectional view showing a state in which the disposable diaper 1 of the present invention shown in FIG. 1 is cut along the line XX. FIG. 4 shows an example different from FIG.
In FIG. 4, the disposable diaper 1 is provided with a three-dimensional gather 15 having a standing point in the vicinity of the inside of the leg-hole elastic member 10. Thus, by arranging the three-dimensional gather 15, the leakage prevention effect can be further enhanced.

FIG. 5 is a cross-sectional view showing a state in which the disposable diaper 1 of the present invention shown in FIG. 1 is cut along line XX, and shows an example different from FIGS. 3 and 4.
In FIG. 5, the disposable diaper 1 is provided with a stretchable elastic member 16 in a stretched state at a side edge portion of a free edge of the sheet member 8 on the first absorbent body 4 side. Thus, by arranging the elastic elastic member 16 on the sheet member 8, as will be described later, it becomes easy to form a pocket structure for storing excrement when the diaper is mounted.

FIG. 6 is a cross-sectional view showing a state in which the disposable diaper 1 of the present invention shown in FIG. 1 is cut along line XX, and shows an example different from FIGS. 3 to 5.
6, in the disposable diaper 1, a plurality of elastic elastic members 17 are arranged in an extended state between the top sheet 2 and the back sheet 3 and between the first absorber 4 and the back sheet 3.
Thus, by arranging the elastic member 17 on the back sheet 3, it becomes easy to form a pocket structure for storing excrement when the diaper is mounted, as will be described later.

In addition, although the example which has arrange | positioned the elastic elastic member 17 between the surface sheet 2 and the back surface sheet 3 and between the 1st absorber 4 and the back surface sheet 3 was shown in FIG. You may arrange | position only between them, or may arrange | position only between the 1st absorber 4 and the back surface sheet 3. FIG.
Also in the example of FIG. 6, as shown in FIG. 5, the elastic elastic member 16 can be disposed on the side edge portion of the free edge of the sheet member 8.

FIG. 7 is a plan view schematically showing a state where the disposable diaper 1 shown in FIG. 1 is mounted.
In FIG. 7, the description of the second absorber, the waist elastic member, and the front patch is omitted for clarity.
In FIG. 7, when the diaper is mounted, the diaper 1 is compressed in the width direction, and in the region where the width of the first absorbent body 4 in the crotch region 7 is narrow, the distance between the pair of sheet members 8 is narrow. In the region where the width of the first absorbent body 4 on the 5th and 6th sides is wide, the interval between the sheet members 8 is not narrowed as in the crotch region. The excrement is absorbed by the first absorber mainly from the region where the interval between the sheet members is wide.

FIG. 8 is a cross-sectional view showing a state in which the disposable diaper 1 shown in FIG. 7 is cut along line YY.
In FIG. 8, when the disposable diaper 1 is worn, the disposable diaper 1 is compressed in the width direction, and the distance between the pair of sheet members 8 is narrowed. Since the pocket structure 18 is formed between the sheet member 8 by being bent, the excrement can be accommodated in the pocket structure 18 and the leakage preventing effect can be improved.
Moreover, since the 1st absorber 4 is formed in the crotch area | region narrowly, when a diaper is mounted | worn, the fit property of a crotch area | region becomes favorable and can acquire the outstanding mounting | wearing feeling.

9 is a cross-sectional view showing a state in which the disposable diaper 1 shown in FIG. 7 is cut along line YY, and shows an example different from FIG.
In FIG. 9, when the disposable diaper 1 is worn, the compression in the width direction is larger than that shown in FIG. 8, and the pair of sheet members 8 overlap each other in the crotch region. Even in such a case, as described with reference to FIG. 7, the spacing between the sheet members is maintained on the front and back body sides, and therefore, excrement can be stored in the pocket structure 18 from this portion. Furthermore, since the excrement which is not accommodated in the pocket structure 18 can be absorbed by the second absorbent body 9 disposed on the sheet member 8, the leakage preventing effect can be improved.

  8 and 9, as shown in FIG. 4, it is possible to dispose solid gathers on both side edges of the diaper 1, and the leakage preventing effect is further improved by arranging the solid gathers. It becomes possible to make it.

  Further, in order to form the disposable diaper of the present invention that forms a pocket structure when worn as shown in FIGS. 8 and 9, at least one-third of the width direction of the diaper in the crotch region is a low stiffness region. It is effective to use a means such as forming the first absorber with a thin absorber, or embossing several slits along the longitudinal direction of the first absorber, Each of these means may be used alone, or a plurality of means may be used in combination.

Hereinafter, although the material used in this invention is demonstrated, this invention is not restrict | limited at all by these.
In the present invention, as the liquid-permeable surface sheet, a non-woven fabric made of synthetic fiber made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is used.

  In the present invention, the liquid-impermeable and breathable back sheet is a liquid-impermeable sheet having moisture permeability such as a polyethylene sheet provided with micropores, or a sheet stretched by adding a filler to a thermoplastic resin. Is used. When such a sheet is used, stuffiness is improved and a comfortable wearing feeling can be obtained. Furthermore, a sheet having a laminated structure in which a cover sheet made of a nonwoven fabric is bonded to the outside of such a sheet can also be used.

  In this invention, as a 1st absorber and a 2nd absorber, both can be used if it is used for an absorbent article like a normal disposable diaper. In other words, a combination of cotton-like pulp and superabsorbent polymer (SAP), a mixture of heat-fusible fibers, etc. can be used, and the whole is wrapped in a hydrophilic sheet such as tissue. Is preferred. In addition, a sheet-like absorbent body such as one provided with a SAP layer on one side of a hydrophilic sheet and one in which SAP is sandwiched between two hydrophilic sheets can also be used.

Moreover, in this invention, although the width dimension in the crotch region of a 1st absorber changes with wearers' body shapes, it is preferable that it is 40-300 mm, and it is more preferable that it is 60-120 mm. When the width dimension of the first absorbent body is less than 40 mm, the absorbent performance of the absorbent article is lowered. On the other hand, when the width dimension is wider than 300 mm, the fit property in the crotch region when the absorbent article is mounted. Becomes worse.
Moreover, it is preferable that the width dimension in the crotch area | region of a 2nd absorber is 40-160 mm on one side, and it is more preferable that it is 50-120 mm. When the width dimension of the second absorbent body is less than 40 mm, the absorbent performance of the absorbent article is deteriorated. On the other hand, when the width exceeds 160 mm, the second absorbent body is disposed when the absorbent article is mounted. The opposing sheet members are easily brought into contact with each other, and the pocket structure for storing excrement does not function sufficiently.

  In the present invention, as the sheet member, a non-woven fabric made of a synthetic fiber made of a hydrophilic web and made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is used. However, when the sheet member is formed of two webs, both of the sheets may be formed of a hydrophilic web, but the web located on the first absorber side is sacrificial water that is not subjected to hydrophilic treatment. It may be formed of a non-woven fabric or a liquid-impermeable sheet.

  In the present invention, the elastic elastic member disposed at the position of the end region of the sheet member, the back sheet surface, the leg opening, and the waist opening includes natural and synthetic urethane threads, thread rubber, flat rubber Elastic bodies used for ordinary disposable diapers such as rubber can be used as they are, and these elastic elastic members are arranged in an expanded state and bonded and fixed with a hot melt adhesive or the like.

  In this invention, it is preferable to arrange | position a pair of solid gathers along the longitudinal direction in an absorbent article. The three-dimensional gather can be formed of various materials. For example, it can be formed using a breathable hydrophobic nonwoven fabric made of synthetic fibers made from polyethylene, polypropylene, polyester, or other thermoplastic resin. Or you may use a wide thing as a nonwoven fabric which forms a side flap, and may form a three-dimensional gather in the part extended to the inner side of an absorbent article while forming a side flap. Furthermore, you may use a wide thing as a surface sheet, and may form a three-dimensional gather in the part extended from the both-sides edge of the absorbent article of a surface sheet.

  In the absorbent article of the present invention, the first absorbent body constituting the absorbent article is formed with a narrow width in the crotch region, and on the top sheet, both sides formed with the narrow width of the first absorbent body. A sheet member is disposed from the vicinity of the edge to the vicinity of both side edges in the longitudinal direction of the absorbent article, and a second absorbent body is disposed on the sheet member. When the absorbent article of the present invention having such a configuration is worn, since the first absorbent body is formed with a narrow width, the crotch region follows the wearer's body shape and movement, Good fit in the crotch region, and in the crotch region, the absorbent article is curved toward the clothing and a pocket structure is formed between the sheet member, so that excrement can be easily stored and further excreted. Even if the object is not stored in the pocket structure, it is absorbed by the second absorbent body arranged on the sheet member forming the pocket structure, so that the leakage prevention effect can be improved more reliably. It is useful as a disposable diaper for adult incontinence and urine pads.

It is a partially notched top view which shows the state which looked at the disposable diaper which is an absorbent article of this invention from the surface sheet side. It is a partially notched top view which shows the other example of the state which looked at the disposable diaper which is an absorbent article of this invention from the surface sheet side. It is sectional drawing which shows the state which cut | disconnected the disposable diaper of this invention shown in FIG. 1 along XX. It is sectional drawing which shows the other example of the state which cut | disconnected the disposable diaper of this invention shown in FIG. 1 along XX. It is sectional drawing which shows the other example of the state which cut | disconnected the disposable diaper of this invention shown in FIG. 1 along XX. It is sectional drawing which shows the other example of the state which cut | disconnected the disposable diaper of this invention shown in FIG. 1 along XX. It is the top view which showed typically the state which mounted | wore the disposable diaper shown in FIG. It is sectional drawing which shows the state which cut | disconnected the disposable diaper shown in FIG. 7 along the YY line. It is sectional drawing which shows the other example of the state which cut | disconnected the disposable diaper shown in FIG. 7 along the YY line.

Explanation of symbols

1: Absorbent article (disposable diaper)
2: Liquid-permeable top sheet 3: Liquid-impermeable back sheet 4: First absorbent body 5: Front body 6: Rear body 7: Inseam area 8: Sheet member 9: Second absorbent body 10: Leg Around elastic member 11: Around waist elastic member 12: Fastening tape 13: Front patch 14: Opening 15: Solid gather 16: Stretchable elastic member 17: Stretchable elastic member 18: Pocket structure

Claims (11)

It has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a first absorber disposed between the two sheets, and the front body, the back body, and the front and back bodies In an absorbent article comprising a crotch region located,
The first absorbent body is formed in a narrow width in the crotch region, and is absorbed from the vicinity of both side edges formed in the narrow width of the first absorbent body on at least the top sheet in the crotch region. A pair of sheet members having a width reaching the vicinity of both side edges in the longitudinal direction of the absorbent article are arranged extending in the longitudinal direction of the absorbent article, and the pair of sheet members includes side edge portions positioned on both side edges of the absorbent article. Both longitudinal ends are joined on the top sheet, and the side edge located on the center side of the absorbent article is a non-joined free edge,
Furthermore, at least in the crotch region, the absorbent article is characterized in that a second absorbent body is disposed on the sheet member.   The absorbent article according to claim 1, wherein the crotch region of the absorbent article is a low-rigidity region in which at least one third of the width direction can be deformed following the movement of the wearer.   The absorbent article according to claim 1 or 2, wherein the first absorbent body and / or the second absorbent body is a thin flexible absorbent body.   The absorptivity according to any one of claims 1 to 3, wherein the first absorbent body is slit-embossed along the longitudinal direction at least in a crotch region. Goods.   The stretchable elastic member is disposed in an expanded state at least in a crotch region between the topsheet and the backsheet and / or between the first absorber and the backsheet. The absorbent article of any one of Claim 4.   The absorbent article according to any one of claims 1 to 5, wherein three-dimensional gathers are arranged at least at both side edges in the longitudinal direction of the crotch region of the absorbent article.   The absorbent article according to any one of claims 1 to 6, wherein a stretchable elastic member is disposed in a stretched state at least in a crotch region at a free edge of the sheet member.   The pair of sheet members are one-piece structure sheet members in which both sheet members are integrated in a region on both ends in the longitudinal direction. Absorbent articles.   The said sheet | seat member is formed from two webs, The said 2nd absorber is arrange | positioned between the said 2 webs, The any one of Claims 1-8 characterized by the above-mentioned. Absorbent article as described in 1.   The absorbent article according to claim 9, wherein the two webs forming the sheet member are hydrophilic liquid-permeable webs. The absorbent article according to claim 9, wherein, of the two webs forming the sheet member, the web located on the first absorbent body side is a water-repellent web.

Images