JP2000333987A - Absorbent article - Google Patents

Absorbent article

Info

Publication number
JP2000333987A
JP2000333987A JP11144890A JP14489099A JP2000333987A JP 2000333987 A JP2000333987 A JP 2000333987A JP 11144890 A JP11144890 A JP 11144890A JP 14489099 A JP14489099 A JP 14489099A JP 2000333987 A JP2000333987 A JP 2000333987A
Authority
JP
Japan
Prior art keywords
absorbent article
longitudinal
skin contact
dimensional
convex
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11144890A
Other languages
Japanese (ja)
Other versions
JP4148594B2 (en
Inventor
Yoshiji Hamashima
Hironori Kawasaki
Atsushi Murai
Minoru Nakanishi
Hiromi Takita
Yasuhiro Yamamoto
稔 中西
耕裕 山本
淳 村井
宏典 河崎
浩美 滝田
美次 濱島
Original Assignee
Kao Corp
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kao Corp, 花王株式会社 filed Critical Kao Corp
Priority to JP14489099A priority Critical patent/JP4148594B2/en
Publication of JP2000333987A publication Critical patent/JP2000333987A/en
Application granted granted Critical
Publication of JP4148594B2 publication Critical patent/JP4148594B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

(57) [Problem] To provide an absorbent article excellent in fitting property and leakage prevention performance. SOLUTION: In a substantially vertically absorbent article 1 comprising a liquid-impermeable leak-proof layer 3 and a liquid-retentive absorbent layer 2 disposed on the skin contact surface side of the leak-proof layer 3, The absorbent article 1 has a constricted portion 5 which is concavely curved toward the skin contact surface side in the longitudinal direction, and whose side portion at the excretion portion contact position becomes narrower in the center direction in plan view. In addition, a convex curved surface three-dimensional portion 6 that is convex on the skin contact surface side is provided on both sides in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a sanitary napkin or an incontinence pad, which has a high fitting property and hardly leaks.

[0002]

BACKGROUND OF THE INVENTION Absorbent articles such as sanitary napkins and incontinence pads comprising a liquid-permeable surface layer, a liquid-impermeable leak-proof layer and a liquid-retentive absorbing layer are widely used. Although it is used, there is a problem in that excrement leaks from the peripheral edge of the absorbent article when worn on the body.

In order to prevent leakage, for example,
In Japanese Utility Model Laid-Open No. 5-5118, it is possible to provide a crack portion on both sides of the absorbing layer, and to extend a top sheet and a leakage prevention sheet on both sides of the crack portion to form a lateral leakage prevention piece raised by an elastic body. Further, Japanese Utility Model Laid-Open No. 59-190227 proposes forming ridges on both sides of an absorber from a leak-proof sheet made of foamed plastic and a water-permeable surface sheet. However, due to the body pressure of the wearer, the side leakage prevention pieces may fall down and excreta may leak out, and the side leakage prevention pieces and the raised parts may give the wearer a sense of incompatibility. Not satisfied with the feeling of wearing.

Accordingly, it is an object of the present invention to provide an absorbent article which is excellent in leak prevention performance and has a good wearing feeling.

[0005]

Means for Solving the Problems The present inventors have found that the above object can be achieved by an absorbent article having a specific three-dimensional shape corresponding to the excretion site of the wearer.

[0006] The present invention relates to a substantially vertically absorbent article comprising a liquid-impermeable leakproof layer and a liquid-retentive absorbent layer disposed on the skin contact surface side of the leakproof layer. The absorbent article is curved concavely on the skin contact surface side in the longitudinal direction,
And the side part of the excretion part contact position has a narrow part narrowed in the center direction in plan view, and has a convex curved three-dimensional part convex on the skin contact surface side on both sides in the longitudinal direction. It is intended to provide an absorbent article characterized by the above.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the sanitary napkin 1 as an absorbent article according to the present embodiment is disposed on a liquid-impermeable leak-proof layer 3 and on the skin contact surface side of the leak-proof layer 3. And a substantially vertically elongated shape. The leak-proof layer 3 is formed by a leak-proof sheet 31, and the absorbent layer 2 is composed of an absorbent 21 having a liquid holding property and the absorbent 21.
And a liquid-permeable top sheet 22 disposed so as to cover the skin contact surface side. The top sheet 22 forms a skin contact surface, and the leakage prevention sheet 31 forms a non-skin contact surface. The non-skin contact surface is provided with a slip stopper 4 for attaching to underwear. In the present invention, the longitudinal direction refers to the longitudinal direction of the absorbent article, and the width direction refers to the direction perpendicular to the longitudinal direction. Further, as for the constituent materials such as the above-mentioned surface sheet, leak-proof sheet and absorber of the present invention, and the manufacturing method as an absorbent article, conventional ones can be used.

As shown in FIG. 2, the sanitary napkin 1 of this embodiment has a shape that is concavely curved toward the skin contact surface in the longitudinal direction. The curved state may be a substantially arcuate shape, or a boat-like shape having a longitudinal central portion as a bottom portion and longitudinal longitudinal front and rear portions as a normal portion. In the case of an arc shape,
The curvature radius r is preferably from 50 to 300 mm, more preferably from 100 to 200 mm, from the viewpoint of the fit to the body and the fit to the underwear. In the case of a boat-shaped shape, the angle between the bottom and the leg is 1 in terms of the fit to the body and the fit to the underwear.
It is preferably from 00 to 170 °, more preferably from 120 to 150 °. The angle between the front slope and the bottom may be different from the angle between the rear slope and the bottom.

Further, the sanitary napkin 1 of the present embodiment comprises:
As shown in FIG. 1, the side portion at the excretion portion contact position has a narrow portion 5 narrowed in the center direction in plan view. In the present embodiment, the constricted portion 5 is provided at substantially the center in the longitudinal direction. A portion narrowed toward the center with respect to the outermost tangents on both sides is defined as a constricted portion. The constricted portion 5 has a minimum width portion of the absorbent article, and the width W0 of the minimum width portion is 60 to 95% of the maximum width W1 of the absorbent article in terms of ease of attachment to the crotch portion. Preferably, 70-85% is more preferable. In addition, the length t0 of the constricted portion 5 in the longitudinal direction is preferably 10 to 70%, more preferably 30 to 50%, with respect to the entire length t1 of the absorbent article from the viewpoint of ease of attachment to the crotch portion. .

Further, the sanitary napkin 1 of the present embodiment comprises:
Each of the two longitudinal sides has a convex curved surface three-dimensional portion 6 that is convex on the skin contact surface side. The convex curved surface three-dimensional portion 6 extends in the longitudinal direction, and has a cross-sectional shape in the width direction that is an arc shape convex toward the skin contact surface side. The convex curved three-dimensional part 6 may exist up to both ends along the longitudinal direction, but it is preferable that at least the constricted part exists substantially over the entire area. Convex curved solid part 6
Is preferably 3 to 25 mm, more preferably 5 to 20 mm, from the viewpoint of the leakage prevention effect and the feeling of wearing. The height h is measured from the base point with the absorbing layer 2 inside the convex curved three-dimensional part 6 in the natural state.

The thickness of the absorber 21 used in the sanitary napkin 1 of the present embodiment is preferably 0.3 to 5 mm, more preferably 0.5 to 3 mm, from the viewpoint of the fit and the three-dimensional shape retention. Further, the width of the absorber 21 is preferably 40 to 80 mm from the viewpoints of excrement absorbability and fit to the body.

Further, the sanitary napkin 1 of the present embodiment is
It is preferable that the central portion has a three-dimensional shape convex toward the skin contact surface side. The three-dimensional shape is preferably a central three-dimensional absorbent part 7 made of an absorbent member, and is specifically made of pulp, a superabsorbent polymer, nonwoven fabric, paper, or the like. The height of the central three-dimensional absorbing portion 7 from the absorbent layer 2 having no three-dimensional shape is preferably 3 to 20 mm, more preferably 5 to 10 from the viewpoint of the fit to the crotch portion and the feeling of wearing. In addition, the length of the central three-dimensional absorbing part 7 is 30 to 2 from the fitting property with the crotch part.
00 mm is preferred, 60 to 160 mm is particularly preferred, and the width is preferably 10 to 50 mm, particularly preferably 20 to 40 mm.

Next, preferred materials and a manufacturing method of the sanitary napkin 1 of the present embodiment will be described.

First, the absorber 21 and the central three-dimensional absorber 7 are arranged on the leak-proof sheet 31, and the topsheet 22 is overlaid thereon. Further, as shown in FIG. 4, the band-shaped elastic sheets 10, 10 are superposed on each other in a state of being stretched in the longitudinal direction on the upper layer on both sides in the longitudinal direction of the sanitary napkin 1.
Outer edge 10 along the longitudinal direction of elastic sheets 10
a, 10a and front and rear end portions 10b, 10b along the width direction
In the above, the elastic sheet 10 and the leak-proof sheet 31 and / or
Alternatively, it is fixed to the topsheet 22. Elastic sheet 10,
The inner edge 10c along the longitudinal direction of 10 has the stretchable sheet 10, the topsheet 22, and the absorber 21 integrated with the fixing layer 11 along the longitudinal direction on the skin contact surface side of the absorbent layer 2. The fixing 11 has a pair of circular arcs convex inward in the width direction of the sanitary napkin 1, and is bonded by pressure bonding by embossing, bonding by an adhesive such as hot melt, heat bonding by heat sealing, ultrasonic bonding, or the like. Provided by
The fixing 11 is preferably groove-shaped, and has a depth of 0.1 to 5 m.
m is preferable, and the width is preferably 0.1 to 5 mm.

In the sanitary napkin 1 of this embodiment, the stretchable sheet 10 is stretched and fixed as described above, and by contraction of the stretchable sheet 10, the stretchable sheet 10 is curved in the longitudinal direction and is placed on the skin contact surface on both sides. A convex curved three-dimensional shape and constrictions on both sides are formed.

The shape curved concavely in the longitudinal direction is formed by the elastic sheet 10 being stretched and fixed in the longitudinal direction and a contraction force acting in the longitudinal direction. The three-dimensional shape of the convex curved surface on the skin contact surface at both sides is formed by a difference in contraction force of the elastic sheet 10. As shown in FIG. 5, the stretchable sheet 10 has different lengths (L1 to L3) between the fixed portions in the longitudinal direction depending on the position in the width direction. Specifically, L1 <L2
As shown in <L3, the distance from the inside to the outside of the sanitary napkin in the width direction becomes longer. That is, the contraction force increases from L1 to L3, and a three-dimensional shape that is more convex toward the skin side is formed according to the contraction distance. At the outer edge portion 10a, since the stretchable sheet is fixed, the contraction force is weakened, the portion L3 where the contraction distance is longest contracts the most, and both sides form a convex shape convex to the skin side. The constricted portions on both sides are formed by the sanitary napkin 1 being drawn in the width direction as the elastic sheet contracts in the longitudinal direction.
The arc-shaped fixing portion 11 of the inner edge 10c and the outer edge 10
The portion of d2 where the distance (d1 to d3) from the fixing of a is the longest is formed to be the most constricted. The fixing 11 of the inner edge 10 c of the elastic sheet is fixed together with the surface layer 22 on the absorber 21.

The fixing of the fixing member 11 and the outer edge portion 10a may be carried out within the range of the constriction and the three-dimensional shape having a convex surface on the skin side by contraction of the elastic sheet. On the outside, L1 to L3 or d
It is possible to change the fixed pattern such as changing the length or position of 1 to d3. For example, the inner fixed pattern 11 may be a mountain-shaped or trapezoidal pattern facing inward, and the outer edge 10a may be curved.

Fixing of the elastic sheet 10 and the leak-proof sheet 31 and the elastic sheet 10 of the absorbent layer 2 and the leak-proof sheet 3
Fixing 1 is performed using heat sealing, hot melt, ultrasonic waves, or the like.

The elastic sheet 10 is made of natural rubber, polybutadiene, polyurethane, styrene-butadiene copolymer, styrene-isoprene copolymer, ethylene and 1-
Examples of the film, nonwoven fabric, and woven fabric, which are made of an elastic material such as an ethylene-α olefin copolymer such as a copolymer with octene or a copolymer of ethylene and ethyl acrylate, are themselves used. Further, a thread-like or narrow-width stretchable material made of the above-described stretchable material may be arranged in the width direction in a stretched state, and a non-woven fabric, a film, a stretched sheet adhesively fixed to a woven fabric or the like may be used. Good. Non-woven fabrics, films, woven fabrics, and the like to be bonded to the thread-like or narrow-width stretchable material include materials made of the above-described stretchable materials, and polyethylene, polypropylene, polyester, and their polyethylene-polypropylene composite materials conventionally known in the art. -A nonwoven fabric or film made of a polyester composite material may be used.

The three-dimensional convex shape at the side can be formed by a stretchable net-like material or a plurality of stretchable thread-like or band-like members other than the stretchable sheet.

As described above, the sanitary napkin 1 of the present embodiment is concavely curved toward the skin contact surface in the longitudinal direction,
A specific shape in which a side portion of the excretion part contacting position has a constricted part 5 narrowed in the center direction in a plan view, and a convex curved three-dimensional part 6 convex on the skin contacting surface side on both sides in the longitudinal direction. Thereby, it fits well to the wearer's crotch and is excellent in leak prevention. The longitudinal curvature fits the curved surface of the body in the front-rear direction, especially preventing leakage from the front and rear ends of the sanitary napkin, and the three-dimensional shape of the constriction and the convex curved surface has a gap especially in the curve and curved surface of the base of the foot Since it is fitted so as not to form, it is possible to provide an absorbent article excellent in fitting property and lateral leakage.

FIG. 6A is a cross-sectional view of the crotch portion when the sanitary napkin 1 of the present embodiment is actually worn on the underwear 12 when the leg 13 is opened by the wearer. As shown in FIG. 6 (b) when the foot 13 is narrowed, the sanitary napkin according to the present embodiment uses the elastic sheet to form the specific shape, thereby allowing the foot 13 to be opened and closed. Deformation from the outside in the width direction is buffered by the elastic three-dimensional part of the convex curved surface, no deformation or pressure is directly applied to the napkin absorption main body, the central part of excretion is always kept stable, and the convex curved three-dimensional part recovers from deformation Because of its excellent properties, it is difficult to twist, follows the movement of the body, fits without gaps on both sides, and has a more leak-resistant form.

Further, the specific three-dimensional shape of the present invention contributes to good shape stability of the shape of the three-dimensional portion having a convex curved surface and compact packaging even in a folded individual package. When the absorbent article is folded in three or four in the longitudinal direction and individually wrapped, the convex curved surface having a constricted portion is not opposed to the convex curved surface even when wrapped in the longitudinal direction at the time of individual wrapping. It is kept stable without crushing and can be packed compactly. Further, in the present embodiment, since the convex curved three-dimensional part is formed from an elastic material, the three-dimensional part is instantaneously reproduced when the folded configuration of the individual package is released by opening.

Further, by forming the three-dimensional shape 7 at the center of the sanitary napkin, not only the amount of absorption of the excreted portion is simply increased, but also the constriction and the convex curved three-dimensional shape formed by the elastic sheets on both sides. In addition, due to the stress buffering effect on the excretory part, the central three-dimensional shape 7 can be always stabilized in the excretory part, and the absorbent body becomes more excellent in absorption. Furthermore, the central three-dimensional shape 7
Contributes to the morphological stability of the convex shape in the individual packaging described above, and the convex curved surfaces on both sides are more difficult to be crushed due to the presence of the middle and high-absorbent material, and become more stable.

Further, a stretchable sheet is stretched in the longitudinal direction on both the left and right sides of the absorbent article, and the outer edge along the longitudinal direction and both ends along the width and along the longitudinal direction of the stretchable sheet. The method of forming the three-dimensional shape by fixing the inner edge portion to a pair of arcs convex inward in the width direction is a method that can more simply form the absorbent article of the present embodiment.

Fixing groove 1 of sanitary napkin 1 of the present embodiment
1 contributes to the formation of the constricted portion 5 and stabilization of the shape, and also contributes to the suppression of absorption and diffusion of body fluid, and exhibits excellent leakproofness.

Although the preferred embodiment has been described, it can be modified as follows. For the formation of the specific shape, the band-shaped elastic sheet 10 was used, but instead, a thread-like elastic material can also be formed,
It can also be formed by molding the above-mentioned specific shape with a foaming material and bonding the absorber 22 and the topsheet 22 on the upper part.
In the embodiment, the constricted portion 5 is the central portion in the longitudinal direction of the absorbent article. However, in the case of a night napkin or the like using a longer rear portion, the constricted portion may be biased forward.
Alternatively, the arrangement of the topsheet and the stretchable sheet may be changed so that the stretchable sheet is first placed on the absorbing section, and the topsheet covers the entire absorbent article on the topsheet.

Although this embodiment has been described as a sanitary napkin, it also functions well as an absorbent article for diapers and incontinent persons.

According to the absorbent article of the present invention, it is possible to obtain an excellent fit to a wearer, a high leakage prevention effect, and a comfortable wearing feeling.

[Brief description of the drawings]

FIG. 1 is a plan view showing a sanitary napkin as a first embodiment of an absorbent article according to the present invention.

FIG. 2 is a longitudinal side view showing a curved state of FIG. 1;

FIG. 3 is a cross-sectional view of the sanitary napkin 1 of FIG.

FIG. 4 is a view showing a state in which a stretchable sheet is arranged and fixed when a sanitary napkin as the first embodiment is manufactured.

FIG. 5 is an enlarged view of the sanitary napkin 1 in an extended state on the left side.

FIG. 6 is a cross-sectional view of the crotch portion when the sanitary napkin of the present embodiment is actually mounted. FIG. 6A shows a state when the foot is opened, and FIG. 6B shows a state when the foot is narrowed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Absorbent layer 21 Absorbent body 22 Top sheet 3 Leak-proof layer 31 Leak-proof sheet 4 Slip stopper 5 Neck 6 Convex curved three-dimensional part 7 Three-dimensional part 10 Elastic sheet 10a Outer edge 10b Front and rear end 10c Inner Edge 11 Fixing groove 12 Underwear 13 Feet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromi Takita 2606 Kabane-cho, Akaga-cho, Haga-gun, Tochigi Prefecture Inside the Kao Co., Ltd. (72) Inventor Misato Hamashima 2606, Akabane-Akabane, Kaiga-cho, Haga-gun, Tochigi Pref. (72) Inventor Minoru Nakanishi 2606 Kabane-cho, Kaga-cho, Haga-gun, Tochigi Pref.

Claims (5)

[Claims]
1. A substantially vertically absorbent article comprising a liquid-impermeable leak-proof layer and a liquid-retentive absorbent layer disposed on the skin contact surface side of the leak-proof layer. The article has a waist portion which is concavely curved toward the skin contact surface side in the longitudinal direction, and has a narrow portion in which the side portion of the excretion portion abutment position becomes narrower in the center direction in plan view, and both side portions in the longitudinal direction. An absorbent article characterized by having a three-dimensional portion having a convex curved surface on the skin contact surface side.
2. The minimum width of the constricted portion with respect to the maximum width of the absorbent article is 60 to 95%, and the longitudinal length of the constricted portion is 10 to 10% of the length of the absorbent article.
The absorbent article according to claim 1, which is 70%.
3. The absorbent article according to claim 1, wherein the three-dimensional portion having a convex curved surface is formed of a stretchable sheet.
4. An outer edge along the longitudinal direction and both ends along the width direction of the elastic sheet are fixed to the leak-proof layer, the surface layer, or the absorbent layer on both right and left sides of the absorbent article; An inner edge along the longitudinal direction of the stretchable sheet is fixed to a pair of linear lines projecting inward in the width direction, and the curving, the convex shape, and the constriction are formed by the contraction force of the stretchable sheet. Item 3. The absorbent article according to Item 3.
5. The absorbent article according to claim 1, wherein a central portion of the absorbent article has a three-dimensional shape convex toward the skin contact surface.
JP14489099A 1999-05-25 1999-05-25 Absorbent articles Expired - Fee Related JP4148594B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14489099A JP4148594B2 (en) 1999-05-25 1999-05-25 Absorbent articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14489099A JP4148594B2 (en) 1999-05-25 1999-05-25 Absorbent articles

Publications (2)

Publication Number Publication Date
JP2000333987A true JP2000333987A (en) 2000-12-05
JP4148594B2 JP4148594B2 (en) 2008-09-10

Family

ID=15372744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14489099A Expired - Fee Related JP4148594B2 (en) 1999-05-25 1999-05-25 Absorbent articles

Country Status (1)

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JP2009519096A (en) * 2005-12-15 2009-05-14 エスセーアー・ハイジーン・プロダクツ・アーベー Absorbent articles
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JP2009131442A (en) * 2007-11-30 2009-06-18 Daio Paper Corp Absorbent article
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JP2016137211A (en) * 2015-01-29 2016-08-04 ピジョン株式会社 Absorbent product

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