JP2014198074A - Absorbent article having flap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article excellent in fitness to the body, and hardly causing turning-up of a flap when wearing.SOLUTION: An absorbent article having a symmetrical shape to a center line extending along the longitudinal direction, and a prescribed thickness includes: a liquid permeable top sheet provided on one side in the thickness direction of the absorbent article; a liquid non-permeable or water-repellent back sheet provided on the other side in the thickness direction; and a liquid holding absorbent member interposed therebetween; and three-dimensional gathers capable of standing to the upper side of the top sheet on the one side. The outer periphery of the absorbent article is specified by a flap which extends to a surface direction specified by the longitudinal direction, and the width direction orthogonal to both longitudinal direction and thickness direction, and where the absorbent member does not exist. The shape and dimension of each part are set in an optimal state.

Description

  The present invention relates to an absorbent article such as an incontinence pad, a sanitary napkin, a panty liner, and more particularly to an absorbent article having a flap.

  Various absorbent articles such as incontinence pads, sanitary napkins, panty liners and the like have been developed to absorb excreta such as urine and feces, menstrual blood, and vaginal discharge. These absorbent articles are basically composed of a liquid-permeable top sheet in contact with the skin, a liquid-impermeable or water-repellent back sheet on the opposite side thereof, and a liquid-retaining absorbent interposed therebetween. However, there are also those having flaps protruding sideways formed by a top sheet or a back sheet.

  Patent document 1 discloses an absorbent article provided with a flap having a relatively large special shape in order to eliminate flap turning and twisting in such a sanitary napkin with a flap. However, since the flap is not stiff, it is difficult to attach to the underwear, and there is a problem that the problem of turning or twisting easily occurs.

  On the other hand, Patent Document 2 discloses an absorptive article provided with a flap in a relatively small area range along the outer periphery of the diaper and further provided with a three-dimensional gather for preventing side leakage. Compared to the configuration of Patent Document 1, the configuration of Patent Document 2 is less likely to cause the problem of turning and twisting because the flap is made smaller, and the provision of a three-dimensional gather gives the stiffness to the flap. It can prevent curl and twist more effectively.

JP 2010-227211 A Japanese Patent No. 2006-198122

The absorbent article disclosed in Patent Document 2 is different from that of Patent Document 1 in that it does not easily turn up, but has a drawback that the fit at the crotch is poor. Further, the absorbent article of Patent Document 2 has a symmetrical shape with respect to a center line extending along the longitudinal direction and has a predetermined thickness, and has a front portion along the longitudinal direction. The maximum width of the front portion along the width direction perpendicular to both the longitudinal direction and the thickness direction is smaller than the maximum width of the rear portion along the width direction, and includes the width direction. The maximum width of the middle part is set smaller than the maximum width of the front part along the width direction, but the difference between the maximum width of the middle part and the maximum width of the front part and the rear part is relatively small. The fit at the crotch is poor.
Then, in order to solve these problems in the prior art, the present invention has an object to provide an absorbent article that has better fit to the body and is less likely to cause flaps to turn up when worn.

  The present invention relates to an absorbent article having a predetermined shape and a symmetrical shape with respect to a center line extending along the longitudinal direction, the liquid permeability provided on one side in the thickness direction of the absorbent article A liquid-impermeable or water-repellent backsheet provided on the other side in the thickness direction, a liquid-retaining absorbent member interposed therebetween, and the topsheet on the one side The absorbent article has a three-dimensional gather that can stand upward, and an outer periphery of the absorbent article extends in a surface direction defined by the longitudinal direction and a width direction orthogonal to both the longitudinal direction and the thickness direction. The absorbent article is defined by a flap without the absorbent member, and the absorbent article extends in the surface direction in a state surrounded by the flap, a first portion, a second portion, and An intermediate portion connecting these, along the longitudinal direction, the maximum width of the first portion along the width direction is smaller than the maximum width of the second portion along the width direction, in the width direction The maximum width of the intermediate portion along the width is smaller than the maximum width of the first portion along the width direction, and on one side across the center line, the maximum width of the intermediate portion is formed along the width direction. An acute angle formed by a straight line connecting the edge portion of the flap and the edge portion of the flap forming the maximum width of the first portion along the width direction with respect to the straight line along the width direction; On the one side, the edge of the flap forming the maximum width of the intermediate portion along the width direction and the flap forming the maximum width of the second portion along the width direction. Directly connecting the edge But the sum of the acute angle formed with respect to a straight line along the width direction, the absorbent article is provided is 175 ° or less 155 ° or more.

In the absorbent article, it is preferable that the maximum width of the first portion along the width direction is 105 to 120% of the maximum width of the intermediate portion along the width direction.
The maximum width of the second portion along the width direction is preferably 110 to 140% of the maximum width of the intermediate portion along the width direction.
Further, the maximum width of the first portion along the width direction is 105 to 120% of the maximum width of the intermediate portion along the width direction, and the maximum width of the second portion along the width direction is the width. It is preferably 110 to 140% of the maximum width of the intermediate portion along the direction, and the difference in width between the two is preferably 0 to 20% or less.

The said absorbent article WHEREIN: It is preferable that the maximum width of the said intermediate part along the said width direction is 30 to 40% of the maximum length of the said absorbent article along the said longitudinal direction.
Moreover, it is preferable that the total area of the said flap in the said surface is 30% or less of the total area of the said absorbent article.
Further, in the absorbent article, an edge portion of the flap constituting the maximum width of the first portion along the width direction and an edge of the flap constituting the maximum width of the second portion in the width direction It is preferable that an acute angle formed by a straight line connecting the portions with respect to the center line on one side across the center line is 5 degrees or less.

In the above absorbent article, the flap may be formed by at least one of the top sheet or the back sheet.
Moreover, the said absorbent article WHEREIN: It is preferable that the width | variety of the said flap is 5-15 mm.

The absorbent article may further include a liquid-permeable second sheet interposed between the top sheet and the absorbent member.
The maximum width of the absorbing member in the width direction may be larger or smaller than the maximum width of the upright portions in the three-dimensional gather.

In the absorbent article, the maximum length of the absorbent article along the longitudinal direction is preferably 20 to 35 cm, and the maximum width of the absorbent article along the width direction is preferably 7 to 15 cm.
The absorbent article may be an incontinence pad.

  According to the present invention, there is provided an absorbent article that has a good fit to the body and is unlikely to cause flaps to turn up when worn.

1 is a plan view of an incontinence pad according to an embodiment of the present invention. FIG. It is sectional drawing in the thickness direction of the incontinence pad of this invention. It is a figure which shows the dimensional relationship in the incontinence pad of this invention. It is a figure which shows the dimensional relationship in the incontinence pad of this invention.

  Hereinafter, an absorbent article according to one preferred embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, an incontinence pad for urine collection is described as an example of the absorbent article, but the absorbent article of the present invention is not limited to this, and other absorbents such as sanitary napkins and panty liners are used. Sexual goods are also included.

  FIG. 1 is a plan view of an incontinence pad 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view in the thickness direction of the incontinence pad 1 of FIG. As shown in these drawings, the incontinence pad 1 has a predetermined thickness and has a generally bowl shape in plan view as a whole, and is in the longitudinal direction (the direction of arrow “A” in FIG. 1). A symmetrical shape is formed with respect to the center line “L” extending along.

  As a basic configuration, the incontinence pad 1 includes a liquid-permeable top sheet 11 provided on one side in the thickness direction of the incontinence pad 1 (arrow “B” direction in FIG. 2), and the other side in the thickness direction. The liquid-impermeable or water-repellent backsheet 13 provided, the liquid-retaining absorbent 15 interposed therebetween, and further, standing up above the top sheet 11 on the one side in the thickness direction. It includes a three-dimensional gather made of a water-repellent nonwoven fabric that can prevent lateral leakage such as urine. In addition to these basic configurations, a liquid-permeable second sheet 19 that can be interposed between the top sheet 11 and the absorber 15 and a core wrap sheet 17 that wraps the absorber 15 may be provided. A peelable adhesive material fastening means 7 for fixing the light incontinence pad 1 to the underwear may be provided on the underwear contact surface of the backsheet 13.

  The top sheet 11 is preferably made of a material that is liquid permeable and can be isolated from the liquid absorbed by the absorbent body 15 from the wearer's skin. Specifically, the top sheet 11 is made of porous foam, reticulated foam, perforated plastic film, natural fiber such as wood or cotton fiber, synthetic fiber such as polyester or polypropylene fiber, or a combination of these. It may be formed from a nonwoven web material. However, the material of the top sheet 11 is not limited to these, and is a liquid permeable material that can isolate the wearer's skin from the liquid that is absorbed and held by the absorber 15. It may be a non-woven fabric.

  The second sheet 19 can also be formed of a fiber material, and may be formed of, for example, a thermal bond nonwoven fabric such as air-through. These nonwoven fabrics are subjected to a hydrophilic treatment and have an action of diffusing user's excrement (such as urine) into the absorbent body 15.

  Absorbent body 15 is generally similar in shape to topsheet 11 and is a web of cellulose fluff, such as wood pulp fluff, mixed with particles of superabsorbent material, commonly known as superabsorbent materials. Any material including a hydrophilic fiber matrix may be used. By making the absorbent body substantially similar to the top sheet, it is possible to minimize the flaps and suppress turning and twisting. Synthetic fibers and polymer fibers may be used instead of the wood pulp fluff. The superabsorbent particles may be mixed uniformly with the hydrophilic fibers or may be mixed non-uniformly. The mixing rate of the superabsorbent particles may be changed depending on the thickness of the absorber, and the mixing rate of the superabsorbent particles may be changed depending on the part of the absorber. The superabsorbent material is preferably in the form of discrete particles, but may have a variety of geometric shapes.

  The back sheet 13 is preferably formed of a material that is impermeable to liquid so as to provide a waterproof function so that liquid held in the absorber 15 does not leak into the undergarment. Usually, such a liquid-impermeable back sheet 13 can be manufactured from a thin plastic film such as a polyethylene film or another flexible liquid-impermeable material. Moreover, such a back sheet 13 may be formed of a microporous air-permeable material so that liquid does not pass through while allowing the vapor from the absorber 15 to escape.

  The three-dimensional gather 20 has a base end portion 21 fixed to both sides in the width direction of the incontinence pad 1 and a standing portion 22 extending from the base end portion 21 toward the center in the width direction. The front and rear direction both end portions are fixed in a non-standing state, and the front and rear direction intermediate portion between them is an unfixed free end. In the vicinity of the free end, an elongated elastic elastic member 31 extends along the front and rear direction. It is fixed in a stretched state. When the elastic elastic member 31 contracts, as shown in “b” of FIG. 2, the standing portion 22 rises toward the wearer side around the standing end 23 on the side of the incontinence pad 1, thereby A solid gather that abuts near the base of the wearer's foot when worn can be formed. The maximum width “A” of the absorber 15 is generally set to be larger than the width “I” between the upright portions 22 constituting the three-dimensional gather. However, in the case of a poise pad or the like, conversely, the maximum width “a” of the absorber 15 is generally set smaller than the width “a” between the upright portions 22 constituting the three-dimensional gather. By providing these three-dimensional gathers, side leakage can be prevented more effectively.

  The outer periphery of the incontinence pad 1 is defined by a flap 6 that is formed by overlapping the top sheet 11, the back sheet 13, or the outer peripheral frame of the top sheet 11 and the back sheet 13 and does not have the absorber 15. The flap 6 extends in the plane direction defined by the longitudinal direction “A” and the width direction (arrow “C” direction in the figure) perpendicular to both the longitudinal direction “A” and the thickness direction “B”.

  3 and 4 show the incontinence pad 1 in the same manner as in FIG. The detailed dimensional relationship described here is obtained from the experimental results shown later.

  The incontinence pad 1 can be roughly divided into three parts because of its shape. That is, the front part 2, the rear part 4, and the middle connecting the front part 2 and the rear part 4 extending in the surface direction defined by the longitudinal direction “A” and the width direction “C” with the periphery surrounded by the flap 6. Part 5.

  Each of these parts is provided along the longitudinal direction “A”, and the maximum width “WF” of the front part 2 along the width direction “C” is the maximum width “of the rear part 4 along the width direction“ C ”. The maximum width “WM” of the intermediate portion 5 along the width direction “C” is set to be smaller than the maximum width “WF” of the front portion 2 along the width direction “C”. By setting such a size, the front portion 2 is directed to the wearer's abdomen side, the rear portion 4 is directed to the wearer's back side, and the width compared to the front portion 2 and the rear portion 4 is set. The narrow intermediate portion 5 can be surely fitted to the wearer's crotch.

Further, as is apparent from the following experimental results, in the incontinence pad 1, the maximum width “WM” of the intermediate portion “5” along the width direction “C” on one side across the center line “L”. A straight line “b” that connects the edge portion 41 of the flap 6 that forms “and the edge portion 42 of the flap 6 that forms the maximum width“ WF ”of the front portion 2 along the width direction“ C ”. Is an acute angle “θ ′” formed with respect to a straight line along the width direction “C” and one side across the center line “L”, the maximum width of the intermediate portion 5 along the width direction “C” A straight line connecting the edge portion 41 of the flap 6 forming “WM” and the edge portion 43 of the flap 6 forming the maximum width “WB” of the rear portion 2 along the width direction “C”. The sum angle “θ ₁ ” of c ”and the acute angle“ θ ”” formed with respect to the straight line along the width direction “C” is 155 It is preferably at least 175 ° and at most 175 °.
The maximum width “WF” of the front portion 2 along the width direction “C” is preferably 105 to 120% of the maximum width “WM” of the intermediate portion “5” along the width direction “C”. The maximum width “WB” of the rear portion 2 along the direction “C” is preferably 110 to 140% of the maximum width “WM” of the intermediate portion 5 along the width direction “C”.
Furthermore, the maximum width “WF” of the front portion 2 along the width direction “C” is 105 to 120% of the maximum width “WM” of the intermediate portion “5” along the width direction “C”. When the maximum width “WB” of the rear portion 2 along the width direction is “110 to 140% of the maximum width“ WM ”of the intermediate portion 5 along the width direction“ C ”, the difference in width between the two is 0 to 20% or less. Is preferred.
Furthermore, the maximum width “WM” of the intermediate portion 5 along the width direction “C” is preferably 30 to 40% of the maximum length “U” of the incontinence pad 1 along the longitudinal direction “A”.

Moreover, in this incontinence pad 1, as shown in FIG. 4, the edge part 42 of the flap 6 which comprises the maximum width "WF" of the front part 2 along width direction "C", and width direction "C" The straight line “d” connecting the edge portion 43 of the flap 6 constituting the maximum width “WB” of the rear portion 2 is center line “L” (or on one side of the center line “L”). The acute angle “θ ₂ ” formed with respect to the parallel line “L ′”) is preferably 5 ° or less, more preferably 2.5 ° or less.
The flap width “e” is preferably 5 to 15 mm.
Further, the total area of the flaps 6 on the surface defined by the longitudinal direction “A” and the width direction “C” is 30% or less of the total area of the incontinence pad 1.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples. However, of course, the present invention is not limited to these examples.
Absorbent articles having the shape shown in FIGS. 1 to 4 (at least a part thereof) were produced, and dimensional relationships were set to the values listed in the table below to give Examples 1 to 3 and the like. On the other hand, as a comparative example, an absorbent article in which only the dimensional relationships listed in the table were changed using the same material and material was produced.
Evaluation was performed for both fit and turning simultaneously, and these were evaluated by 8 monitors. The evaluation results were classified into four stages: ◎ (very clear), ○ (good), △ (normal), and × (not clear).

上記表において、「最大長」は、長手方向「Ａ」に沿う失禁パッド１の最大長「ウ」を意味し、単位は「ｃｍ」である。また、「最大幅」は、幅方向「Ｃ」に沿う失禁パッド１の中間部５の最大幅「ＷＭ」を意味し、単位は「ｃｍ」である。「鋭角の和」は、図３中の角度「θ’」と角度「θ”」の和の角度「θ₁」を意味し、単位は「度」である。「ＷＦ：ＷＭ」は、中間部５の最大幅「ＷＭ」を基準として、第一部分２の最大幅「ＷＦ」の長さを比で表わしたもの、「ＷＢ：ＷＭ」は、中間部５の最大幅「ＷＭ」を基準として、第二部分４の最大幅「ＷＢ」の長さを比で表わしたもの、「両者の差」は、「ＷＢ：ＷＭ」の比と「ＷＦ：ＷＭ」の比の差を表わしたものである。「ＷＭと最大長」は、中間部分５の最大幅「ＷＭ」を基準として、長手方向「Ａ」に沿う同失禁パッド１の最大長「ウ」の長さを、パーセンテージで表わしたもので単位は「％」である。「フラップ総面積」は、失禁パッド１の総面積に占めるフラップの総面積の割合を、パーセンテージで表わしたもので単位は「％」である。「エッジ部鋭角」は、図４の角度「θ₂」を意味し、単位は「度」である。「フラップ幅」は、図４におけるフラップ幅「ｅ」を表わしたもので単位は「ｍｍ」である。
表１から明らかなように、実施例１乃至３の寸法関係等によれば、フィット性およびまくれの評価として良好な結果が得られた。特に、「鋭角の和」を、１５５°以上１７５°以下、「ＷＦ：ＷＭ」を、１０５：１〜１２０：１、「ＷＢ：ＷＭ」を、１１０：１〜１４０：１、「両者の差」を、０〜２０％以下、「ＷＭと最大長」を、３０〜４０％、 「フラップ総面積」を３０％以下、「エッジ部角度」を５度以下、「フラップ幅」を、５〜１５ｍｍ等とした場合に、比較例１に示す従来のもの等に比べて、著しく高い評価が得られた。
尚、本発明は、表１でも示したように、長手方向「Ａ」に沿う最大長「ウ」が、２０〜３５ｃｍ、幅方向「Ｃ」に沿う最大幅「ＷＢ」が、７〜１５ｃｍの範囲で実験を行なっており、そのような大きさの、例えば、失禁パッドに適用することによって、大きな効果が得られると考えられる。 The obtained results are shown in Table 1.
Table 1

In the above table, “maximum length” means the maximum length “c” of the incontinence pad 1 along the longitudinal direction “A”, and its unit is “cm”. “Maximum width” means the maximum width “WM” of the intermediate portion 5 of the incontinence pad 1 along the width direction “C”, and its unit is “cm”. The “sum of acute angles” means the angle “θ ₁ ” of the sum of the angle “θ ′” and the angle “θ ″” in FIG. 3, and the unit is “degree”. “WF: WM” is the ratio of the length of the maximum width “WF” of the first portion 2 relative to the maximum width “WM” of the intermediate portion 5, and “WB: WM” The ratio of the length of the maximum width “WB” of the second portion 4 with respect to the maximum width “WM” as a ratio, “difference between the two” is the ratio of “WB: WM” and “WF: WM”. It represents the difference in ratio. “WM and maximum length” is a unit expressed as a percentage of the maximum length “c” of the incontinence pad 1 along the longitudinal direction “A” with reference to the maximum width “WM” of the intermediate portion 5. Is "%". The “total flap area” is the percentage of the total area of the flap in the total area of the incontinence pad 1 expressed as a percentage, and the unit is “%”. The “edge portion acute angle” means the angle “θ ₂ ” in FIG. 4, and the unit is “degree”. “Flap width” represents the flap width “e” in FIG. 4 and its unit is “mm”.
As is clear from Table 1, according to the dimensional relationships of Examples 1 to 3, good results were obtained for evaluation of fit and turning. In particular, “sum of acute angles” is 155 ° to 175 °, “WF: WM” is 105: 1 to 120: 1, “WB: WM” is 110: 1 to 140: 1, “difference between the two” "0 to 20% or less", "WM and maximum length" 30 to 40%, "Flap total area" 30% or less, "Edge angle" 5 degrees or less, "Flap width" 5 to When the thickness was set to 15 mm or the like, remarkably high evaluation was obtained as compared with the conventional one shown in Comparative Example 1.
In the present invention, as shown in Table 1, the maximum length “U” along the longitudinal direction “A” is 20 to 35 cm, and the maximum width “WB” along the width direction “C” is 7 to 15 cm. Experiments have been conducted in a range, and it is considered that a large effect can be obtained by applying to such a size, for example, an incontinence pad.

  It can be applied to various absorbent articles such as sanitary napkins and panty liners.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Front part 4 Back part 5 Middle part 6 Flap 11 Top sheet 13 Back sheet 15 Absorbing member 41 Edge part 42 Edge part 43 Edge part A Longitudinal direction C Width direction B Thickness direction L Center line WF Frontmost part Large WM Maximum width in the middle WB Maximum width in the rear

Claims (14)

An absorbent article having a symmetric shape with respect to a center line extending along the longitudinal direction and having a predetermined thickness,
A liquid-permeable top sheet provided on one side in the thickness direction of the absorbent article, a liquid-impermeable or water-repellent back sheet provided on the other side in the thickness direction, and interposed therebetween A liquid-holding absorbent member, and a three-dimensional gather that can stand up above the top sheet on the one side,
The outer periphery of the absorbent article is defined by a flap that does not have the absorbent member and extends in a surface direction defined by the longitudinal direction and a width direction orthogonal to both the longitudinal direction and the thickness direction. And
The absorbent article includes a first portion, a second portion, and an intermediate portion that connects the first portion, the second portion, and an intermediate portion that connect the first portion, the first portion, and the second portion that extend in the plane direction with the periphery surrounded by the flap. The maximum width of the first portion along the width direction is smaller than the maximum width of the second portion along the width direction, and the maximum width of the intermediate portion along the width direction is the first portion along the width direction. Less than the maximum width of
On one side across the center line, the edge of the flap forming the maximum width of the intermediate portion along the width direction and the maximum width of the first portion along the width direction are formed. A straight line connecting the edge portions of the flaps is formed with an acute angle formed with respect to the straight line along the width direction, and on the one side, the maximum width of the intermediate portion is formed along the width direction. A straight line connecting the edge portion of the flap and the edge portion of the flap forming the maximum width of the second portion along the width direction is an acute angle formed with respect to the straight line along the width direction. An absorbent article having a sum of 155 ° or more and 175 ° or less.   The absorbent article according to claim 1, wherein the maximum width of the first portion along the width direction is 105 to 120% of the maximum width of the intermediate portion along the width direction.   The absorbent article according to claim 1 or 2, wherein a maximum width of the second portion along the width direction is 110 to 140% of a maximum width of the intermediate portion along the width direction. The maximum width of the first portion along the width direction is 105 to 120% of the maximum width of the intermediate portion along the width direction;
The maximum width of the second portion along the width direction is 110 to 140% of the maximum width of the intermediate portion along the width direction;
The absorptive article according to claim 2 or 3 whose difference of both widths is 0 to 20% or less.   The absorbent article according to any one of claims 1 to 4, wherein a maximum width of the intermediate portion along the width direction is 30 to 40% of a maximum length of the absorbent article along the longitudinal direction.   The absorbent article according to any one of claims 1 to 5, wherein a total area of the flaps on the surface is 30% or less of a total area of the absorbent article.   A straight line connecting the edge portion of the flap constituting the maximum width of the first portion along the width direction and the edge portion of the flap constituting the maximum width of the second portion in the width direction, The absorbent article according to any one of claims 1 to 6, wherein an acute angle formed with respect to the center line on one side across the center line is 5 degrees or less.   The absorbent article according to any one of claims 1 to 7, wherein the flap is formed of at least one of the top sheet or the back sheet.   The absorbent article according to any one of claims 1 to 8, wherein a width of the flap is 5 to 15 mm.   The absorbent article according to claim 1, further comprising a liquid-permeable second sheet interposed between the top sheet and the absorbent member.   The absorbent article according to any one of claims 1 to 10, wherein a maximum width of the absorbent member in the width direction is larger than a maximum width of upright portions constituting a three-dimensional gather.   The absorbent article according to any one of claims 1 to 10, wherein a maximum width of the absorbent member in the width direction is smaller than a maximum width of standing parts constituting a three-dimensional gather.   The maximum length of the absorbent article along the longitudinal direction is 20 to 35 cm, and the maximum width of the absorbent article along the width direction is 7 to 15 cm. Absorbent article.   The absorbent article according to claim 13, wherein the absorbent article is an incontinence pad.

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