JP4619253B2 - Absorbent articles - Google Patents

Absorbent articles Download PDF

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JP4619253B2
JP4619253B2 JP2005285074A JP2005285074A JP4619253B2 JP 4619253 B2 JP4619253 B2 JP 4619253B2 JP 2005285074 A JP2005285074 A JP 2005285074A JP 2005285074 A JP2005285074 A JP 2005285074A JP 4619253 B2 JP4619253 B2 JP 4619253B2
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leak
proof
absorbent article
groove
napkin
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JP2007089906A5 (en
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昌男 倉橋
哲哉 草川
雅俊 道本
綾 伊藤
進介 長原
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Kao Corp
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Kao Corp
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Description

本発明は、生理用ナプキンや失禁パッドを始めとする、体液の吸収に用いられる吸収性物品に関する。   The present invention relates to an absorbent article used for absorbing body fluids, such as sanitary napkins and incontinence pads.

本出願人は先に、吸収層の表面層側に形成された所定形状の防漏溝と、吸収層の左右両側縁それぞれの近傍から起立した防漏壁とを具備する吸収性物品を提案した（特許文献１参照）。防漏壁は、基壁部と、該基壁部の上方部から吸収性物品の内方及び外方それぞれへ張り出す内方張出部及び外方張出部とを有している。内方張出部及び外方張出部それぞれには、その長さ方向に沿って弾性部材が配されている。内方張出部は、吸収層の上方であって且つ防漏溝よりも外方に位置している。防漏溝は、吸収性物品の長さ方向に長軸を有する楕円形状に近い閉じた形状をしている。この吸収性物品はフィット性が高く、液漏れが効果的に防止される。また、装着圧によって防漏壁が押し潰れた場合にも液漏れが効果的に防止される。   The present applicant has previously proposed an absorbent article comprising a leak-proof groove having a predetermined shape formed on the surface layer side of the absorbent layer, and a leak-proof wall standing from the vicinity of each of the left and right side edges of the absorbent layer. (See Patent Document 1). The leak-proof wall has a base wall part, and an inwardly extending part and an outwardly extending part that protrude from the upper part of the base wall part to the inside and the outside of the absorbent article, respectively. Each of the inwardly extending part and the outwardly extending part is provided with an elastic member along its length direction. The inward projecting portion is located above the absorption layer and outside the leak-proof groove. The leak-proof groove has a closed shape close to an elliptical shape having a major axis in the length direction of the absorbent article. This absorbent article has high fit, and liquid leakage is effectively prevented. In addition, liquid leakage is effectively prevented even when the leak-proof wall is crushed by the mounting pressure.

前記の吸収性物品とは別に、防漏溝の形状に関し、着用者の排血口部位の周囲に閉じた形状の防漏溝を形成した吸収性物品が知られている（特許文献２参照）。この防漏溝は、着用者の排血口部位の両側に、幅方向外方に膨出する膨出エンボス部を有している。膨出エンボス部の外側には、吸収性物品の長手方向に延びるギャザーカフスが設けられている。ギャザーカフスが収縮すると、その収縮力によって吸収要素が長手方向に収縮する。この収縮によって膨出エンボス部は、着用者の排血口部位側に膨らむ。つまり、この吸収性物品においては、吸収要素が長手方向に収縮することで、該吸収要素に膨出した中高部が形成される。しかしこの吸収性物品は、先に述べた内方張出部及び外方張出部を有する防漏壁を具備するものではない。   In addition to the absorbent article, there is known an absorbent article in which a leak-proof groove having a closed shape is formed around the blood drainage site of the wearer regarding the shape of the leak-proof groove (see Patent Document 2). . This leak-proof groove has a bulging embossed portion that bulges outward in the width direction on both sides of the blood drainage site of the wearer. A gather cuff extending in the longitudinal direction of the absorbent article is provided outside the bulging embossed portion. When the gather cuff contracts, the absorbing element contracts in the longitudinal direction by the contraction force. By this contraction, the bulging embossed portion swells toward the blood drainage site of the wearer. That is, in this absorbent article, when the absorbent element contracts in the longitudinal direction, a middle and high part that bulges into the absorbent element is formed. However, this absorbent article does not include the leak-proof wall having the above-described inwardly extending portion and outwardly protruding portion.

中高部の形成に関し、吸収性物品の装着中に、該吸収性物品に横方向から加わる圧縮力を利用して、縦長の中央領域を着用者の肌側に持ち上げて、着用者の身体に密着させるようにした吸収性物品が提案されている（特許文献３参照）。この吸収性物品には、閉じた形状の防漏溝が形成されているものの、該防漏溝には、着用者の排血口部位の両側に、先に述べた膨出エンボス部が形成されていない。   With regard to the formation of the middle and high parts, while wearing the absorbent article, it uses the compressive force applied to the absorbent article from the lateral direction to lift the vertically long central area toward the wearer's skin and adhere closely to the wearer's body There has been proposed an absorbent article (see Patent Document 3). Although this absorbent article has a leak-proof groove having a closed shape, the above-mentioned bulging embossed portions are formed on both sides of the blood drainage site of the wearer. Not.

特開２００２−０００６５６JP 2002-000656 A 特開２００１−０９５８４２JP 2001-095842 A 特開２００４−１８１０８４JP 2004-181084 A

本発明の目的は、防漏壁間に位置する吸収面を有効活用し得ると共に、吸収面を着用者の肌側に安定して隆起させ得る吸収性物品を提供することにある。   An object of the present invention is to provide an absorbent article that can effectively utilize an absorbing surface positioned between leak-proof walls and can stably raise the absorbing surface on the skin side of the wearer.

本発明は、表面層側の左右両側部に位置し且つ長手方向へそれぞれ延びる防漏溝と、各防漏溝のそれぞれ外側に位置し且つ長手方向へそれぞれ延びる防漏壁とを有する吸収性物品において、
前記防漏壁は、基壁部と、該基壁部の上端から水平方向に張り出した肌当接面部とを備え、該肌当接面部には該防漏壁の長手方向に延びる弾性部材が伸長状態で配されており、
各防漏溝は、着用者の排泄部に対向する部分が、吸収性物品の幅方向外方に向けて凸状に湾曲している吸収性物品を提供することにより前記目的を達成したものである。 The present invention relates to an absorbent article having leakage preventing grooves located on the left and right side portions on the surface layer side and extending in the longitudinal direction, and leakage preventing walls located on the outer sides of the leakage preventing grooves and extending in the longitudinal direction, respectively. In
The leak-proof wall includes a base wall portion and a skin contact surface portion projecting horizontally from the upper end of the base wall portion, and an elastic member extending in the longitudinal direction of the leak-proof wall is provided on the skin contact surface portion. It is arranged in an extended state,
Each leak-proof groove achieves the above-described object by providing an absorbent article in which a portion facing the excretion part of the wearer is curved convexly outward in the width direction of the absorbent article. is there.

本発明の吸収性物品によれば、防漏溝は、着用者の排泄部に対向する部分が、吸収性物品の幅方向外方に向けて凸状に湾曲しているので、該防漏溝を折曲の起点として吸収性物品が身体側へ押し上げられやすくなる。その結果、防漏壁が外側へ開きやすくなり、吸収面が該防漏壁によって覆われにくくなる。従って、吸収面を有効活用することが可能になり、防漏効果が高まる。また、防漏溝を折曲の起点として吸収性物品が身体側へ押し上げられやすくなるので、該防漏溝間に位置する吸収体が安定して盛り上がりやすくなり、盛り上がった吸収体が着用者の肌に密着し、防漏効果が一層高まる。   According to the absorbent article of the present invention, the leak-proof groove is such that the portion facing the excretion part of the wearer is convexly curved outward in the width direction of the absorbent article. As a starting point of bending, the absorbent article is easily pushed up to the body side. As a result, the leak-proof wall is easily opened outward, and the absorption surface is not easily covered by the leak-proof wall. Therefore, it is possible to effectively use the absorption surface, and the leakage prevention effect is enhanced. In addition, since the absorbent article is easily pushed up to the body side with the leakage prevention groove as a starting point of bending, the absorbent body positioned between the leakage prevention grooves is easily and stably swelled. Adheres closely to the skin, further enhancing the leak-proof effect.

以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。図１には、本発明の吸収性物品の一実施形態としての生理用ナプキンをそのトップシート側からみた平面図が示されており、図２には、図１におけるII−II線断面図が示されている。   The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a plan view of a sanitary napkin as an embodiment of the absorbent article of the present invention as seen from the top sheet side, and FIG. 2 shows a cross-sectional view taken along the line II-II in FIG. It is shown.

図１及び図２に示すように、本実施形態の生理用ナプキン１は、縦長の形状をしており、液透過性の表面層としてのトップシート２、液不透過性の裏面層としてのバックシート３、及びトップシート２とバックシート３との間に介在する液保持性の吸収層としての吸収体４を具備する。ナプキン１のトップシート側における左右両側部には、その長手方向に沿って一対の防漏壁５，５が配されている。防漏壁５は、吸収体４の左右両側縁それぞれの近傍から起立している。   As shown in FIGS. 1 and 2, the sanitary napkin 1 of the present embodiment has a vertically long shape, a top sheet 2 as a liquid-permeable surface layer, and a back as a liquid-impermeable back layer. The sheet 3 and the absorbent body 4 as a liquid retaining absorbent layer interposed between the top sheet 2 and the back sheet 3 are provided. A pair of leak-proof walls 5 and 5 are arranged along the longitudinal direction on the left and right side portions on the top sheet side of the napkin 1. The leak-proof wall 5 stands from the vicinity of the left and right side edges of the absorber 4.

ナプキン１は、その着用時に着用者の排泄部に対向する部位である排泄部対向部Ａと、該排泄部対向部Ａに隣接し且つナプキン１の前方及び後方にそれぞれ位置する前方部Ｂ及び後方部Ｃとに区分される。   The napkin 1 includes an excretion part facing part A that is a part facing the excretion part of the wearer when worn, and a front part B and a rear part that are adjacent to the excretion part facing part A and located in front and rear of the napkin 1, respectively. It is divided into part C.

トップシート２は、吸収体４の上面の全域を被覆し且つ吸収体４の側縁から延出してバックシート側へ巻き込まれている。トップシート２は、従来の公知のものと同様の材料から構成することができ、例えば親水性の不織布や開孔フィルム等が用いられる。バックシート３は、例えば液不透過性のフィルムシート（好ましくは水蒸気透過性で且つ液不透過性のフィルムシート）から構成されている。吸収体４は、例えばフラッフパルプと高吸収性ポリマーの粒子との混合物がティッシュペーパーに包被されて構成されている。   The top sheet 2 covers the entire area of the upper surface of the absorbent body 4 and extends from the side edge of the absorbent body 4 and is wound on the back sheet side. The top sheet 2 can be made of the same material as a conventionally known one, and for example, a hydrophilic nonwoven fabric or an apertured film is used. The back sheet 3 is composed of, for example, a liquid impermeable film sheet (preferably a water vapor permeable and liquid impermeable film sheet). The absorbent body 4 is configured by, for example, a mixture of fluff pulp and superabsorbent polymer particles wrapped in tissue paper.

バックシート３は、吸収体４の側縁から外方に延出し、ナプキン１の排泄部対向部Ａの位置において一対のウイング６を形成している。なお、図示していないが、バックシート３及びウイング６の着衣対向面には、ナプキン１を着衣に固定するための粘着剤の層が形成されている。該粘着剤の層は図示していない剥離紙によって保護されている。   The back sheet 3 extends outward from the side edge of the absorbent body 4 and forms a pair of wings 6 at the position of the excretory part facing part A of the napkin 1. Although not shown, an adhesive layer for fixing the napkin 1 to the clothing is formed on the clothing facing surfaces of the back sheet 3 and the wing 6. The pressure-sensitive adhesive layer is protected by a release paper (not shown).

トップシート２及びバックシート３はそれぞれ吸収体４の前後端から延出しており、延出したトップシート２とバックシート３とが互いに接合固定されてエンドシール部７を形成している。   The top sheet 2 and the back sheet 3 respectively extend from the front and rear ends of the absorber 4, and the extended top sheet 2 and the back sheet 3 are bonded and fixed to each other to form an end seal portion 7.

ナプキン１の左右両側部に配されている防漏壁５は、一枚の帯状シートをスリーブ状に且つＴ字型に加工して形成されている。防漏壁５は、基壁部５ａを備えている。基壁部５ａは、固定端と自由状態の上端とを有し、該固定端が吸収体４の側縁よりもやや外方の位置においてバックシート上から起立している。   The leak-proof walls 5 disposed on the left and right sides of the napkin 1 are formed by processing a single belt-like sheet into a sleeve shape and a T-shape. The leak-proof wall 5 includes a base wall portion 5a. The base wall portion 5 a has a fixed end and a free upper end, and the fixed end stands on the back sheet at a position slightly outward from the side edge of the absorber 4.

防漏壁５は更に肌当接面部５ｂを備えている。肌当接面部５ｂは、基壁部５ａの上端から水平方向に張り出している面状の部分である。肌当接面部５ｂは、ナプキン１の幅方向における内方及び外方それぞれへ同程度の張り出し量で張り出している。肌当接面部５ｂの張り出しは、ナプキン１の長さ方向全域に亘っている。肌当接面部５ｂは、特に排泄部対向部Ａの位置においてナプキン１の肌当接面とほぼ平行な平坦面となっている。肌当接面部５ｂは、ナプキン１の装着状態においてその上面が、着用者の肌に面で当接するようになっている。   The leak-proof wall 5 further includes a skin contact surface portion 5b. The skin contact surface portion 5b is a planar portion projecting in the horizontal direction from the upper end of the base wall portion 5a. The skin contact surface portion 5b protrudes inward and outward in the width direction of the napkin 1 with the same amount of protrusion. The overhang of the skin contact surface portion 5 b extends over the entire length direction of the napkin 1. The skin contact surface portion 5b is a flat surface substantially parallel to the skin contact surface of the napkin 1, particularly at the position of the excretory portion facing portion A. The skin contact surface portion 5b is configured such that the upper surface of the skin contact surface portion 5b contacts the wearer's skin when the napkin 1 is attached.

肌当接面部５ｂには、防漏壁５の長手方向に延びる複数の弾性部材５ｃが配されている。弾性部材５ｃの構成材料としては、通常吸収性物品に用いられるものであれば特に制限されない。例えばポリオレフィン類及びポリウレタン類の発泡体並びに天然ゴムが好ましく用いられる。弾性部材５ｃの形状は糸状、帯状、フィルム状等とすることができる。本実施形態においては、糸状の弾性部材を用いている。弾性部材５ｃは、少なくともナプキン１の排泄部対向部Ａに配されている。弾性部材５ｃは、防漏壁５を形成するシート内に伸長状態で固定されている。この固定手段としては、ヒートシールやホットメルト接着剤などが用いられる。各弾性部材５ｃの伸長率はほぼ同様となっている。   A plurality of elastic members 5c extending in the longitudinal direction of the leak-proof wall 5 are disposed on the skin contact surface portion 5b. The constituent material of the elastic member 5c is not particularly limited as long as it is normally used for absorbent articles. For example, foams of polyolefins and polyurethanes and natural rubber are preferably used. The shape of the elastic member 5c can be a thread, a band, a film, or the like. In this embodiment, a thread-like elastic member is used. The elastic member 5 c is disposed at least in the excretion part facing part A of the napkin 1. The elastic member 5c is fixed in an expanded state in the sheet forming the leak-proof wall 5. As this fixing means, a heat seal or a hot melt adhesive is used. The expansion ratio of each elastic member 5c is substantially the same.

ナプキン１の自然状態においては弾性部材５ｃが収縮することで、防漏壁５が確実に起立する。このような構成の防漏壁５によれば、肌当接面部５ｂの上面が着用者の大腿部に弾性的に且つ面で密着するという面シール効果が発現する。その結果、着用者の動作に起因する位置ずれなどの影響を受けにくくなり、液漏れが効果的に防止される。また、着用者の動作に起因して防漏壁５が内方へ押し倒され易くなる状況においても、幅方向外側寄りに配された弾性部材５ｃの張力によって防漏壁５を外方へ傾斜させる力が働き、防漏壁５が内方へ押し倒されることが効果的に防止される。その結果、肌当接面部５ｂの大腿部への密着度が高く維持される。特に、弾性部材５ｃを、肌当接面部５ｂにおける左右の自由端近傍に配することで、肌当接面部５ｂの水平方向への張り出しが一層安定して、前述の面シール効果が一層向上する。
In the natural state of the napkin 1, the leak-proof wall 5 stands up reliably because the elastic member 5c contracts. According to the leak-proof wall 5 having such a configuration, the surface sealing effect that the upper surface of the skin contact surface portion 5b is in close contact with the wearer's thigh elastically and on the surface appears. As a result, it becomes difficult to be affected by misalignment caused by the wearer's movement, and liquid leakage is effectively prevented. Further, even in a situation where the leak-proof wall 5 is likely to be pushed inward due to the wearer's movement, the leak-proof wall 5 is inclined outward by the tension of the elastic member 5c arranged on the outer side in the width direction. The force works and the leak-proof wall 5 is effectively prevented from being pushed down inward. As a result, the degree of adhesion of the skin contact surface portion 5b to the thigh is maintained high. In particular, by disposing the elastic member 5c in the vicinity of the left and right free ends of the skin contact surface portion 5b, the horizontal contact of the skin contact surface portion 5b is further stabilized, and the aforementioned surface sealing effect is further improved. .

防漏壁５は、前方部Ｂ及び後方部Ｃの位置において、肌当接面部５ｂのうち内方へ張り出している部分がトップシート２に固定されている。肌当接面部５ｂは、排泄部対向部Ａの位置においてはトップシート２に固定されていない。これによって防漏壁５は、排泄部対向部Ａの位置において一層起立しやすくなり、またナプキン１のバックシート側が凸状に湾曲してナプキン全体が着用者の体型に沿った形状となる。その結果、肌当接面部５ｂの上面が一層安定的に着用者の大腿部に密着し、面シール効果が一層発現するようになる。特に、本実施形態のように、防漏壁５の起立位置の外方にウイング６が設けられていると、ナプキン１の装着状態において、ウイング６の折り返しに起因して、防漏壁５の基端位置を外方へ安定化させる力が働き、ナプキン１の肌対向面側における液の受容領域も広くなる。   The leak-proof wall 5 is fixed to the top sheet 2 at the positions of the front part B and the rear part C. The skin contact surface portion 5b is not fixed to the top sheet 2 at the position of the excretory portion facing portion A. As a result, the leak-proof wall 5 is more likely to stand at the position of the excretory part facing part A, and the back sheet side of the napkin 1 is curved in a convex shape so that the whole napkin is shaped along the wearer's body shape. As a result, the upper surface of the skin contact surface portion 5b is more stably adhered to the wearer's thigh, and the surface sealing effect is further exhibited. In particular, when the wing 6 is provided outside the standing position of the leak-proof wall 5 as in this embodiment, the leak-proof wall 5 is caused by the folding of the wing 6 when the napkin 1 is attached. A force that stabilizes the base end position outwardly acts, and the liquid receiving area on the skin facing surface side of the napkin 1 is also widened.

防漏壁５の基端位置を外方へ安定化させる力が働くことに起因して、及び肌当接面部５ｂの長手方向前後端部が、ナプキンの長手方向前後端部において固定されていることに起因して、防漏壁５の肌当接面部５ｂは、着用者の大腿部の動きによる影響を受け難くなり、面状が安定して発現する。更に、肌対向面側における液の受容領域も一層広くなる。ナプキンの長さが長くなるほど、肌当接面部５ｂの長手方向前後端部が固定される位置間の距離が大きくなるので、着用者の大腿部の動きによる影響が小さくなる。その結果、一層良好な効果が得られる。   Due to the fact that the force that stabilizes the base end position of the leak-proof wall 5 outwards works, and the longitudinal front and rear end portions of the skin contact surface portion 5b are fixed at the longitudinal front and rear end portions of the napkin. As a result, the skin contact surface portion 5b of the leak-proof wall 5 is hardly affected by the movement of the wearer's thigh, and the surface shape is stably expressed. Furthermore, the liquid receiving area on the skin facing surface side is further widened. As the length of the napkin increases, the distance between the positions at which the longitudinal front and rear ends of the skin contact surface portion 5b are fixed increases, so that the influence of the movement of the wearer's thigh is reduced. As a result, a better effect can be obtained.

ナプキン１のトップシート側には、その両側部にナプキン１の長手方向へ延びる防漏溝８，８がそれぞれ形成されている。各防漏溝８は、トップシート２と吸収体４とが、トップシート側からエンボス等の圧搾手段によって圧密化及び一体化されて形成されている。先に述べた各防漏壁５は、各防漏溝８のそれぞれ外側に位置している。各防漏溝８は、ナプキン１の縦中心線に関してほぼ対称な形状になっている。各防漏溝８は、それらの前後端が互いに連結しており、これによって全体として閉じた形状をなしている。   On the top sheet side of the napkin 1, leakage preventing grooves 8, 8 extending in the longitudinal direction of the napkin 1 are formed on both sides thereof. Each leak-proof groove 8 is formed by consolidating and integrating the top sheet 2 and the absorber 4 by pressing means such as embossing from the top sheet side. Each leakage prevention wall 5 described above is located outside each leakage prevention groove 8. Each leak-proof groove 8 has a substantially symmetric shape with respect to the vertical center line of the napkin 1. The leakage prevention grooves 8 are connected to each other at their front and rear ends, thereby forming a closed shape as a whole.

各防漏溝８は、排泄部対向部Ａに位置する部分が、ナプキン１の幅方向外方に向けて凸状に湾曲している（以下、この部分を中央湾曲溝８ａという）。中央湾曲溝８ａの前後は、ナプキンの長手方向前後に延びて前方溝８ｂ及び後方溝８ｃをそれぞれ形成している。中央湾曲溝８ａ及びその前後から延びる前方溝８ｂ及び後方溝８ｃからなる防漏溝８は、ナプキン１のほぼ全長にわたって延びている。前方溝８ｂ及び後方溝８ｃは、中央湾曲溝８ａと同様に、ナプキン１の幅方向外方に向けて凸状に湾曲している。その結果、各防漏溝８は、中央湾曲溝８ａと前方溝８ｂとの連結部の位置にくびれ部９ａを有している。これに加えて中央湾曲溝８ａと後方溝８ｃとの連結部の位置にくびれ部９ｂを有している。   Each leak-proof groove 8 has a portion located in the excretory portion facing portion A curved in a convex shape outward in the width direction of the napkin 1 (hereinafter, this portion is referred to as a central curved groove 8a). The front and back of the central curved groove 8a extend in the longitudinal direction of the napkin to form a front groove 8b and a rear groove 8c, respectively. The central curved groove 8a and the leak-proof groove 8 including the front groove 8b and the rear groove 8c extending from the front and rear of the central curved groove 8a extend over almost the entire length of the napkin 1. The front groove 8b and the rear groove 8c are curved in a convex shape toward the outer side in the width direction of the napkin 1, similarly to the central curved groove 8a. As a result, each leak-proof groove 8 has a constricted portion 9a at the position of the connecting portion between the central curved groove 8a and the front groove 8b. In addition, a constricted portion 9b is provided at the position of the connecting portion between the central curved groove 8a and the rear groove 8c.

図２に示すように、ナプキン１においては、その幅方向でみたときに、防漏溝８，８間と防漏溝８の外側とで吸収体４の厚みに差がある。図２から明らかなように、防漏溝８の外側よりも防漏溝８，８間、即ち閉じた形状の防漏溝８で取り囲まれた領域の方が、厚みが大きくなっている。本実施形態においては、吸収体４の構成材料は、防漏溝８，８間と防漏溝８の外側とで同じであるから、吸収体４の厚みの差は、吸収体４の坪量の差と対応している。つまり、ナプキン１においては、防漏溝８，８間に位置する吸収体４と、防漏溝８の外側に位置する吸収体４とで坪量に差があり、防漏溝８，８間に位置する吸収体４が、防漏溝８の外側に位置する吸収体４よりも高坪量になっている。その結果ナプキン１においては、防漏溝８で囲繞された領域が、防漏溝８の外側に位置する周縁域よりも盛り上がった形状をしている。   As shown in FIG. 2, when the napkin 1 is viewed in the width direction, there is a difference in the thickness of the absorbent body 4 between the leak-proof grooves 8 and 8 and the outside of the leak-proof groove 8. As apparent from FIG. 2, the thickness is larger in the region surrounded by the closed leakage prevention groove 8, that is, between the leakage prevention grooves 8, 8 than the outside of the leakage prevention groove 8. In the present embodiment, the constituent material of the absorber 4 is the same between the leak-proof grooves 8 and 8 and the outside of the leak-proof groove 8, so the difference in the thickness of the absorber 4 is the basis weight of the absorber 4. This corresponds to the difference. That is, in the napkin 1, there is a difference in basis weight between the absorbent body 4 positioned between the leak-proof grooves 8 and 8 and the absorbent body 4 positioned outside the leak-proof groove 8. The absorbent body 4 located in the upper part has a higher basis weight than the absorbent body 4 located outside the leak-proof groove 8. As a result, in the napkin 1, the area surrounded by the leak-proof groove 8 has a shape that rises more than the peripheral area located outside the leak-proof groove 8.

以上の構成を有する本実施形態のナプキン１によれば、ナプキン１の装着状態において着用者の動作に起因して横方向からの圧縮力がナプキン１に加わった場合、各防漏壁５が互いに近接しづらくなる。つまりナプキン１の吸収面であるトップシート側の面が、各防漏壁５、特に各肌当接面部５ｂで覆われ難くなる。その結果、吸収面を有効に活用することができ防漏効果が高まる。この理由は、ナプキン１の排泄部対向部Ａに位置する防漏溝８が、ナプキン１の幅方向外方に向けて凸状に湾曲している中央湾曲溝８ａを形成しているためである。詳細には、横方向からの圧縮力がナプキン１に加わった場合、該圧縮力は中央湾曲溝８ａのアーチ形状によって溝の長手方向に分散され、吸収体４の内部まで伝わり難くなる。その結果、図３に模式的に示すように、中央湾曲溝８ａを折曲の起点としてナプキン１が山折れしやすくなる。特に、中央湾曲溝８ａの前後にくびれ部９ａ，９ｂが形成されていると、横方向からのナプキン１に加わる圧縮力が中央湾曲溝８ａの長手方向に一層効果的に伝達されるので、中央湾曲溝８ａを折曲の起点としてのナプキン１の山折れが一層確実に起こるようになる。
According to the napkin 1 of the present embodiment having the above-described configuration, when the compressive force from the lateral direction is applied to the napkin 1 due to the movement of the wearer in the mounted state of the napkin 1, the leak-proof walls 5 are mutually connected. It becomes difficult to approach. That is, the surface on the top sheet side that is the absorption surface of the napkin 1 is difficult to be covered with each leak-proof wall 5, in particular, each skin contact surface portion 5b. As a result, the absorption surface can be used effectively and the leakage prevention effect is enhanced. This is because the leak-proof groove 8 located in the excretory part facing part A of the napkin 1 forms a central curved groove 8a that is curved convexly outward in the width direction of the napkin 1. . Specifically, when a compressive force from the lateral direction is applied to the napkin 1, the compressive force is dispersed in the longitudinal direction of the groove by the arch shape of the central curved groove 8a, and is difficult to be transmitted to the inside of the absorber 4. As a result, as schematically shown in FIG. 3, the napkin 1 is likely to be bent at the central curved groove 8 a as the starting point of the bending. In particular, when the constricted portions 9a and 9b are formed before and after the central curved groove 8a, the compressive force applied to the napkin 1 from the lateral direction is more effectively transmitted to the longitudinal direction of the central curved groove 8a. The mountain break of the napkin 1 with the curved groove 8a as the starting point of the bending occurs more reliably.

これに対して、図４に示す従来のナプキン１’、即ち排泄部対向部Ａ’に位置する防漏溝８’が、幅方向外方に向けて凸状に湾曲していないものでは、横方向からの圧縮力がナプキン１’に加わった場合、図５（ａ）に模式的に示すように、防漏溝８’を折曲の起点としてナプキン１’が谷折れしやすくなる。谷折れが著しい場合には、図５（ｂ）に模式的に示すように、防漏壁５’における肌当接面部５ｂ’によれが生じてしまい、肌当接面部５ｂ’による面シール効果が低下してしまう。図５（ａ）及び（ｂ）に示すような現象が起こる理由は、ナプキン１’にその横方向から加わった圧縮力を、防漏溝８’で食い止めることができず、該圧縮力が吸収体４の内部にまで伝わってしまうからである。この現象は、排泄部対向部Ａ’に位置する防漏溝８’が、幅方向内方に向けてくびれている場合に特に顕著である。   On the other hand, in the case where the conventional napkin 1 ′ shown in FIG. 4, that is, the leak-proof groove 8 ′ positioned in the excretory part facing part A ′ is not curved convexly outward in the width direction, When the compressive force from the direction is applied to the napkin 1 ′, the napkin 1 ′ is likely to be bent at the leakage preventing groove 8 ′ as a starting point of bending as schematically shown in FIG. When the valley fold is remarkable, as shown schematically in FIG. 5 (b), the skin contact surface portion 5b ′ of the leak-proof wall 5 ′ is distorted, and the surface sealing effect by the skin contact surface portion 5b ′. Will fall. The reason why the phenomenon shown in FIGS. 5A and 5B occurs is that the compressive force applied to the napkin 1 ′ from the lateral direction cannot be stopped by the leak-proof groove 8 ′, and the compressive force is absorbed. This is because it is transmitted to the inside of the body 4. This phenomenon is particularly remarkable when the leak-proof groove 8 ′ located in the excretory part facing part A ′ is narrowed inward in the width direction.

以上の通り、本実施形態のナプキン１の特徴は、基壁部５ａの先端から水平方向に面状に張り出した肌当接面部５ｂを備えた防漏壁５を有するナプキンにおいて、排泄部対向部Ａに位置する防漏溝８が、ナプキン１の幅方向外方に向けて凸状に湾曲している点にある。本実施形態のナプキン１によれば、肌当接面部５ｂを備えた防漏壁５に関して先に述べた種々の利点を損なうことなく、該防漏壁５を用いる場合に特有の課題が解決される。従って、肌当接面部５ｂを有さない防漏壁を備えたナプキンにおいて、ナプキン１の幅方向外方に向けて凸状に湾曲した防漏溝８、即ち中央湾曲溝８ａを形成しても、本実施形態のナプキン１において奏される顕著な効果は奏されない。   As described above, the feature of the napkin 1 according to the present embodiment is that the napkin having the leak-proof wall 5 including the skin contact surface portion 5b that projects in a planar shape in the horizontal direction from the tip of the base wall portion 5a is the excretory portion facing portion. The leak-proof groove 8 located at A is in a point curved outwardly in the width direction of the napkin 1. According to the napkin 1 of this embodiment, the problems peculiar to the case of using the leak-proof wall 5 are solved without impairing the various advantages described above with respect to the leak-proof wall 5 provided with the skin contact surface portion 5b. The Therefore, even if the napkin provided with the leak-proof wall not having the skin contact surface portion 5b is formed with the leak-proof groove 8 curved in a convex shape toward the outer side in the width direction of the napkin 1, that is, the central curved groove 8a. The remarkable effect which is show | played in the napkin 1 of this embodiment is not show | played.

本実施形態のナプキン１においては、図３に示すようにナプキン１が中央湾曲溝８ａを折曲の起点として山折れしやすくなるので、吸収面、即ちトップシート側の面が安定的に盛り上がって着用者の身体に密着するようになる。その結果、ナプキン１のフィット性が高まり、これによって防漏効果が一層高まる。特に、吸収体４において盛り上がる部分は、閉じた形状の防漏溝８によって取り囲まれているので、当該部分の面形状の安定性が一層高められている。   In the napkin 1 of the present embodiment, as shown in FIG. 3, the napkin 1 is easy to be bent with the central curved groove 8a as a starting point of bending, so that the absorption surface, that is, the surface on the top sheet side is stably raised. It comes in close contact with the wearer's body. As a result, the fitting property of the napkin 1 is enhanced, thereby further improving the leakage prevention effect. In particular, since the raised portion of the absorbent body 4 is surrounded by the leak-proof groove 8 having a closed shape, the stability of the surface shape of the portion is further enhanced.

吸収面を一層安定的に盛り上げるためには、防漏溝８，８間に位置する吸収体４の坪量を高めるのが効果的であることが、本発明者らの検討の結果判明した。防漏溝８，８間に位置する吸収体４が高坪量であることは先に述べた通りであるが、当該坪量が３００〜１５００／ｍ2、特に５００〜１２００ｇ／ｍ2であると、吸収面を更に一層安定的に盛り上げることが可能となる。また、この範囲の坪量は、ナプキン１の側方から加わる圧力によって、中央湾曲溝８ａを折曲の起点としてナプキン１が身体側へ押し上げられやすくなる観点からも有利である。なお、前記の坪量の範囲のうち３００〜９００ｇ／ｍ2の範囲では、折曲の起点となる効果が主たるものであり、９００〜１５００ｇ／ｍ2の範囲では、折曲の起点となる効果に加えて、中高部が太鼓状に若干変形して盛り上がり起こり易くなる効果も生じる。 As a result of the examination by the present inventors, it is effective to increase the basis weight of the absorbent body 4 positioned between the leak-proof grooves 8 and 8 in order to raise the absorption surface more stably. As described above, the absorbent body 4 positioned between the leak-proof grooves 8 and 8 has a high basis weight, but the basis weight is 300 to 1500 / m 2 , particularly 500 to 1200 g / m 2 . Then, it becomes possible to raise the absorption surface even more stably. The basis weight within this range is also advantageous from the viewpoint that the napkin 1 is easily pushed up to the body side with the central curved groove 8a as a starting point of bending by the pressure applied from the side of the napkin 1. In addition, in the range of 300-900 g / m < 2 > among the ranges of the said basic weight, the effect used as the starting point of bending is main, and the effect used as the starting point of bending in the range of 900-1500 g / m < 2 >. In addition, there is also an effect that the middle and high parts are slightly deformed into a drum shape and are easily raised.

防漏溝８，８間に位置する吸収体４の坪量は前述の通りであり、一方、防漏溝８の外側に位置する吸収体４の坪量は、１００〜４００ｇ／ｍ2、特に１５０〜３００ｇ／ｍ2であることが、吸収面を一層安定的に盛り上げる観点、及び中央湾曲溝８ａを折曲の起点としてナプキン１が身体側へ押し上げられやすくなる観点から好ましい。 The basis weight of the absorbent body 4 positioned between the leak-proof grooves 8 and 8 is as described above, while the basis weight of the absorbent body 4 positioned outside the leak-proof groove 8 is 100 to 400 g / m 2 , in particular. It is preferable that it is 150-300 g / m < 2 > from a viewpoint which raises an absorption surface more stably, and a viewpoint from which the napkin 1 can be easily pushed up to the body side from the center curved groove 8a as a starting point of bending.

同様の観点から、吸収体４において、前記の高坪量となっている領域は、吸収体４を平面視したとき、当該領域の輪郭が、閉じた形状をなしている防漏溝８の形状と一致していることが好ましい。吸収体４をこのように構成するためには、例えば吸収体４を下層吸収体と、その上に積層された上層吸収体との２層構成とし、上層吸収体の平面視での輪郭に沿って防漏溝８を形成すればよい。   From the same viewpoint, in the absorber 4, the region having the high basis weight is the shape of the leak-proof groove 8 in which the outline of the region forms a closed shape when the absorber 4 is viewed in plan. It is preferable to match. In order to configure the absorber 4 in this way, for example, the absorber 4 has a two-layer configuration of a lower layer absorber and an upper layer absorber laminated thereon, and follows the outline of the upper layer absorber in plan view. Thus, the leakage prevention groove 8 may be formed.

更に同様の観点から、中央湾曲溝８ａは、図６に示すように、前後のくびれ部９ａ，９ｂを結ぶ線分の長さＬと、当該線分と中央湾曲溝８ａの頂点との間の距離Ｄとの比であるＬ／Ｄが２．５〜２０、特に５〜１５であることが好ましい。Ｌ及びＤそのものの値に関しては、Ｌは５０〜１００ｍｍ、特に６０〜８０ｍｍであることが好ましく、Ｄは５〜２０ｍｍ、特に５〜１０ｍｍであることが好ましい。 Further, from the same viewpoint, as shown in FIG. 6, the central curved groove 8a is formed between the length L of the line segment connecting the front and rear constricted portions 9a and 9b , and the apex of the central curved groove 8a. It is preferable that L / D which is a ratio with the distance D is 2.5 to 20, particularly 5 to 15. With respect to the values of L and D themselves, L is preferably 50 to 100 mm, particularly 60 to 80 mm, and D is preferably 5 to 20 mm, particularly 5 to 10 mm.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記実施形態に制限されない。例えば前記実施形態においては、防漏壁５における肌当接面部５ｂの水平方向への張り出し量は、幅方向内方と外方とで同程度であったが、これに代えて、幅方向内方と外方とで張り出し量が異なるようにしてもよい。   As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, the amount of the skin contact surface portion 5b in the leak-proof wall 5 that protrudes in the horizontal direction is approximately the same between the inner side and the outer side in the width direction. The amount of overhang may be different between the outer side and the outer side.

防漏壁５における基壁部５ａの固定端の固定状態は、図２に示すように、防漏壁５を構成するシートの両側部が吸収体４の下部から外方へ延出して固定される態様だけでなく、図７（ａ）及び図７（ｂ）に示す態様としてもよい。図７（ａ）においては、防漏壁５を構成するシートの両側部が、基壁部５ａの固定端からナプキンの側縁部へ向かって延出している。図７（ｂ）においては、防漏壁５を構成するシートの一側部が、基壁部５ａの固定端から吸収体４の上に向かって延出していると共に、該シートの他側部が、基壁部５ａの固定端からナプキンの側縁部へ向かって延出している。   As shown in FIG. 2, the fixed state of the fixed end of the base wall portion 5 a in the leak-proof wall 5 is fixed by extending both sides of the sheet constituting the leak-proof wall 5 outward from the lower part of the absorber 4. It is good also as an aspect shown to Fig.7 (a) and FIG.7 (b). In Fig.7 (a), the both sides of the sheet | seat which comprises the leak-proof wall 5 are extended toward the side edge part of the napkin from the fixed end of the base wall part 5a. In FIG.7 (b), while the one side part of the sheet | seat which comprises the leak-proof wall 5 is extended toward the absorber 4 from the fixed end of the base wall part 5a, the other side part of this sheet | seat However, it extends toward the side edge of the napkin from the fixed end of the base wall 5a.

また前記実施形態においては、各防漏溝８はそれらの前後端が互いに連結していたが、これに代えて前端又は後端のどちらか一方の端部は連結していなくてもよく、或いは前後端の双方が連結していなくてもよい。   In the above-described embodiment, the front and rear ends of each leakage prevention groove 8 are connected to each other. Alternatively, either the front end or the rear end may not be connected, or Both front and rear ends may not be connected.

本発明の吸収性物品の一実施形態としての生理用ナプキンを示す平面図である。It is a top view which shows the sanitary napkin as one Embodiment of the absorbent article of this invention. 図１におけるII−II線断面図である。It is the II-II sectional view taken on the line in FIG. 図１に示すナプキンを装着した状態での排泄部対向部における幅方向断面図である。It is width direction sectional drawing in the excretion part opposing part in the state which mounted | wore with the napkin shown in FIG. 従来の生理用ナプキンを示す平面図である。It is a top view which shows the conventional sanitary napkin. 図４に示すナプキンを装着した状態での排泄部対向部における幅方向断面図である。FIG. 5 is a cross-sectional view in the width direction of the excretory part facing part in a state where the napkin shown in FIG. 防漏溝における中央湾曲溝の拡大して示す模式図である。It is a schematic diagram which expands and shows the center curved groove in a leak-proof groove. 本発明の別の実施形態におけるII−II線断面図である。It is II-II sectional view taken on the line in another embodiment of this invention.

符号の説明Explanation of symbols

１ 生理用ナプキン
２ トップシート
３ バックシート
４ 吸収体
５ 防漏壁
５ａ 基壁部
５ｂ 肌当接面部
８ 防漏溝
８ａ 中央湾曲溝
８ｂ 前方溝
８ｃ 後方溝
９ くびれ部
DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Top sheet 3 Back sheet 4 Absorber 5 Leak-proof wall 5a Base wall part 5b Skin contact surface part 8 Leak-proof groove 8a Central curved groove 8b Front groove 8c Back groove 9 Neck part

Claims (6)

表面層側の左右両側部に位置し且つ長手方向へそれぞれ延びる防漏溝と、各防漏溝のそれぞれ外側に位置し且つ長手方向へそれぞれ延びる防漏壁とを有する吸収性物品において、
前記防漏壁は、基壁部と、該基壁部の上端から水平方向に張り出した肌当接面部とを備え、該肌当接面部には該防漏壁の長手方向に延びる弾性部材が伸長状態で配されており、
前記防漏壁における基壁部は、該防漏壁を構成するシートが吸収体と裏面層との間に位置し、そこから幅方向外方に該シートが延出して固定されており、
各防漏溝は、着用者の排泄部に対向する部分が、吸収性物品の幅方向外方に向けて凸状に湾曲しており、且つ該防漏溝が幅方向外方に向けて凸状に湾曲した位置の更に幅方向外方にウイングが設けられており、
各防漏溝間に位置する吸収体が、該防漏溝の外側に位置する吸収体よりも高坪量になっており、それによって、該防漏溝の外側の吸収体の厚みよりも、各防漏溝間に位置する吸収体の方が、厚みが大きくなっている吸収性物品。 In an absorbent article having a leak-proof groove located on the left and right sides on the surface layer side and extending in the longitudinal direction, and a leak-proof wall located on the outside of each leak-proof groove and extending in the longitudinal direction, respectively.
The leak-proof wall includes a base wall portion and a skin contact surface portion projecting horizontally from the upper end of the base wall portion, and an elastic member extending in the longitudinal direction of the leak-proof wall is provided on the skin contact surface portion. It is arranged in an extended state,
The base wall portion of the leak-proof wall is a sheet that constitutes the leak-proof wall is located between the absorber and the back surface layer, and the sheet extends and is fixed outwardly in the width direction therefrom.
Each proof Momizo, the portion facing the excretion portion of the wearer, is curved convexly toward outward in the width direction of the absorbent article, and-proof Momizo is toward outward in the width direction protruding Wing is provided further outward in the width direction of the curved position
The absorbent body located between the leak-proof grooves has a higher basis weight than the absorbent body located outside the leak-proof groove, whereby the thickness of the absorbent body outside the leak-proof groove is larger than An absorbent article in which the thickness of the absorbent body located between the leak-proof grooves is larger . 前記の各防漏溝は、それらの前後端が互いに連結して閉じた形状をなしている請求項１記載の吸収性物品。   2. The absorbent article according to claim 1, wherein the leakage prevention grooves have a shape in which front and rear ends thereof are connected to each other and closed. 前記防漏壁は、前記吸収性物品における、着用者の排泄部に対向する部分に隣接し且つ該吸収性物品の前方及び後方にそれぞれ位置する前方部及び後方部の位置において、肌当接面部のうち内方へ張り出している部分が前記表面層に固定されており、かつ該防漏壁は、該吸収性物品の着用者の排泄部に対向する部分においては、該肌当接面部が該表面層に固定されていない請求項１又は２記載の吸収性物品。 The leak-proof wall is adjacent to a portion of the absorbent article that faces the excretion part of the wearer and is located at the front part and the rear part of the absorbent article. The inwardly projecting portion is fixed to the surface layer, and the leakage-preventing wall has a skin contact surface portion at the portion facing the excretion portion of the wearer of the absorbent article. The absorbent article according to claim 1 or 2, which is not fixed to the surface layer . 閉じた形状をなしている前記防漏溝の形状と、該防漏溝内に位置する高坪量の吸収体の平面視での輪郭とが一致している請求項１ないし３の何れかに記載の吸収性物品。 Closed and shape of the anti Momizo shape forms a, to one of 3 to the claims 1 matches the contour in plan view of the absorber of high basis weight located within-proof Momizo The absorbent article as described. 前記防漏溝内に位置する高坪量の吸収体の坪量が３００〜１５００ｇ／ｍ2であり、該防漏溝の外側に位置する吸収体の坪量が１００〜４００ｇ／ｍ 2 である請求項１ないし４の何れかに記載の吸収性物品。 The basis weight of the absorber high basis weight located within explosion Momizo is 300 to 1500 g / m are two der, basis weight of the absorbent body located outside the-proof Momizo is at 100 to 400 g / m 2 It claims 1 Ru Ah to absorbent article according to any one of 4. 前記の各防漏溝は、吸収性物品の幅方向外方に向けて凸状に湾曲している部分の前後の位置においてそれぞれくびれ部を有している請求項１ないし５の何れかに記載の吸収性物品。   Each said leak-proof groove has a constriction part in the position before and behind the part which is curving convexly toward the width direction outward of an absorbent article, respectively. Absorbent articles.
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