JP4459013B2 - Absorbent articles - Google Patents
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- JP4459013B2 JP4459013B2 JP2004305790A JP2004305790A JP4459013B2 JP 4459013 B2 JP4459013 B2 JP 4459013B2 JP 2004305790 A JP2004305790 A JP 2004305790A JP 2004305790 A JP2004305790 A JP 2004305790A JP 4459013 B2 JP4459013 B2 JP 4459013B2
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Description
本発明は、生理用ナプキンやパンティライナー等の吸収性物品に関する。 The present invention relates to absorbent articles such as sanitary napkins and panty liners.
従来、液透過性の表面シート、液不透過性の裏面シート及びこれら両シート間に介在された液保持性の吸収体を具備し、実質的に縦長に形成されている吸収性物品において、着用時に、吸収体の幅方向の断面形状を所定の形状に変形させることによって、防漏性の向上やフィット性の向上を図る技術が知られている。
例えば、特許文献1には、吸収体の肌当接面側の面に一対の溝を形成すると共に、一対の前記溝間における非肌当接面側の面にも溝を形成したものが記載されている。
また、特許文献2には、一対の溝を形成した吸収体における溝間の領域を、伸長状態で固定した弾性体で収縮させるようにした吸収性物品が記載されている。
Conventionally, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent body interposed between the two sheets are provided in an absorbent article that is formed substantially vertically. A technique is known that improves leakage resistance and fit by changing the cross-sectional shape of the absorbent body in the width direction into a predetermined shape.
For example, Patent Document 1 describes a structure in which a pair of grooves are formed on the skin contact surface side surface of the absorber, and a groove is also formed on the non-skin contact surface side surface between the pair of grooves. Has been.
Patent Document 2 describes an absorbent article in which a region between grooves in an absorbent body in which a pair of grooves is formed is contracted by an elastic body fixed in an extended state.
しかし、従来の吸収性物品においては、使用時に、吸収体の断面形状がいびつに変形したり、一部において屈曲して折れ曲がり部が生じることによって、着用者の肌に違和感を与える恐れがある。また、特許文献2記載のものは、弾性体を伸長状態で固定する必要があり、製造工程及び製品の構造が複雑となる。 However, in the conventional absorbent article, when used, the cross-sectional shape of the absorbent body may be deformed, or part of the absorbent article may be bent and a bent portion may be formed, which may give the wearer's skin an uncomfortable feeling. Moreover, the thing of patent document 2 needs to fix an elastic body in the expansion | extension state, and a manufacturing process and the structure of a product become complicated.
従って、本発明の目的は、着用時に、吸収体が、着用者の肌に向かって曲面状に突出した形状に変形し、優れたフィット性及び防漏性が得られる吸収性物品を提供することにある。 Accordingly, an object of the present invention is to provide an absorbent article in which, when worn, the absorbent body is deformed into a shape protruding in a curved shape toward the wearer's skin, and excellent fit and leakage resistance are obtained. It is in.
本発明は、液透過性の表面シート、液不透過性の裏面シート、及びこれら両シート間に介在された液保持性の吸収体を具備し、実質的に縦長に形成された吸収性物品であって、前記吸収体は、その幅方向中央部における裏面シート側の面に凹部を有すると共に、該凹部の両側に位置する部分の表面シート側の面に、長手方向に延びる一対の溝を有しており、前記凹部は、前記吸収体の構成材料の坪量を他の部分より減らして形成されており、該凹部の幅が5〜30mmであ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 comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent body interposed between the two sheets, and is an absorbent article formed substantially vertically. The absorbent body has a recess on the surface on the back sheet side in the central portion in the width direction, and has a pair of grooves extending in the longitudinal direction on the surface on the surface sheet side of the portion located on both sides of the recess. The concave portion is formed by reducing the basis weight of the constituent material of the absorbent body from other portions, and the object is provided by providing an absorbent article having a width of the concave portion of 5 to 30 mm. Achieved.
また、本発明は、液透過性の表面シート、液不透過性の裏面シート及びこれら両シート間に介在された液保持性の吸収体を具備し、実質的に縦長に形成されている吸収性物品であって、前記吸収体は、上部吸収層と下部吸収層とからなり、該下部吸収層は、その幅方向中央部に開口部を有すると共に、該開口部の両側に位置する部分の表面シート側の面に、長手方向に延びる一対の溝を有しており、前記上部吸収層は、吸収性物品の幅方向において、一対の前記溝間の領域に位置し且つ前記開口部の両側に跨っ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。 Further, the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and has a substantially vertically long absorptivity. The article includes an upper absorbent layer and a lower absorbent layer, and the lower absorbent layer has an opening at a central portion in the width direction and surfaces of portions located on both sides of the opening. The sheet-side surface has a pair of grooves extending in the longitudinal direction, and the upper absorbent layer is located in a region between the pair of grooves in the width direction of the absorbent article and on both sides of the opening. The said objective is achieved by providing the absorbent article straddling.
本発明の吸収性物品によれば、着用時に、吸収体が、着用者の肌に向かって曲面状に突出した形状に変形し、優れたフィット性及び防漏性が得られる。 According to the absorbent article of the present invention, when worn, the absorbent body is deformed into a shape protruding in a curved shape toward the wearer's skin, and excellent fit and leakage resistance are obtained.
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。
本発明の吸収性物品の一実施形態(第1実施形態)である生理用ナプキン1(以下、ナプキン1という)は、図1〜図3に示すように、液透過性の表面シート2、液不透過性の裏面シート3、及びこれら両シート間に介在された液保持性の吸収体4を具備し、実質的に縦長に形成されている。
The present invention will be described below based on preferred embodiments with reference to the drawings.
As shown in FIGS. 1 to 3, a sanitary napkin 1 (hereinafter referred to as napkin 1), which is an embodiment (first embodiment) of the absorbent article of the present invention, is a liquid-permeable top sheet 2, a liquid An impermeable back sheet 3 and a liquid-retaining absorbent 4 interposed between the two sheets are provided and are formed substantially vertically long.
吸収体4は、ナプキン1の長手方向と同方向に長い形状を有している。表面シート2は、着用時に、着用者の肌に向けられる肌当接面を形成している。表面シート2は、吸収体4の上面を覆う部分と、該部分から幅方向外方に延出した延出部とを有しており、該延出部は、吸収体4の側面部を覆って、下面側に巻き下げられ、その端縁部が、吸収体4と裏面シート3との間に接着剤で固定されている。 The absorber 4 has a long shape in the same direction as the longitudinal direction of the napkin 1. The topsheet 2 forms a skin contact surface directed to the wearer's skin when worn. The topsheet 2 has a portion that covers the upper surface of the absorber 4 and an extending portion that extends outward in the width direction from the portion, and the extending portion covers a side surface portion of the absorber 4. Then, it is wound down to the lower surface side, and its edge is fixed between the absorber 4 and the back sheet 3 with an adhesive.
また、表面シート2及び裏面シート3は、吸収体4の長手方向の両端それぞれから長手方向外方に延出し、それらの延出部において互いに接合されてエンドシール部5,5を形成している。ナプキン1の裏面シート3側の面(非肌当接面側の面)には、ナプキン固定用の粘着部(図示略)が形成されている。 Further, the top sheet 2 and the back sheet 3 extend outward in the longitudinal direction from both ends in the longitudinal direction of the absorbent body 4 and are joined to each other at the extending portions to form end seal portions 5 and 5. . An adhesive portion (not shown) for fixing the napkin is formed on the surface of the napkin 1 on the back sheet 3 side (surface on the non-skin contact surface side).
本ナプキン1における吸収体4は、図2に示すように、その幅方向中央部における裏面シート3側の面に凹部41を有すると共に、該凹部41の両側に位置する部分4B,4Bの表面シート2側の面に、ナプキン1の長手方向に延びる一対の溝42,42を有している。 As shown in FIG. 2, the absorbent body 4 in the napkin 1 has a recess 41 on the surface on the back sheet 3 side in the center in the width direction, and the top sheets of the parts 4 </ b> B and 4 </ b> B located on both sides of the recess 41. A pair of grooves 42 and 42 extending in the longitudinal direction of the napkin 1 are provided on the two-side surface.
前記凹部41は、吸収体4の略中央部に存する略矩形状部分4Aの構成材料の坪量を、他の部分、特に凹部41の両側に位置する部分4B,4Bより減らして形成されている。具体的には、周面に多数の集積用凹部を有し回転する積繊ドラムを備え、パルプ繊維等の繊維材料及び/又は吸水性ポリマーを空気流にのせて積繊ドラムに向けて供給し、これらを、各集積用凹部の底面に形成された多数の開孔から吸引して該集積用凹部内に堆積させるように構成した公知の積繊機における、前記各集積用凹部の底面に、前記凹部41に対応する形状の凸部を形成することによって得られたものである。凹部41に対応する形状の凸部は、例えば、多数の開孔を有する金属板又は網状体にプレス加工等により形成することができる。 The concave portion 41 is formed by reducing the basis weight of the constituent material of the substantially rectangular portion 4A existing in the substantially central portion of the absorbent body 4 from other portions, particularly the portions 4B and 4B located on both sides of the concave portion 41. . Specifically, it is provided with a spinning fiber drum that has a large number of collecting recesses on its peripheral surface and rotates, and fiber materials such as pulp fibers and / or water-absorbing polymers are placed on the air stream and supplied toward the fiber drum. In the well-known fiber stacking machine configured to suck these through a large number of openings formed in the bottom surface of each accumulation recess and deposit them in the accumulation recess, on the bottom surface of each accumulation recess, This is obtained by forming a convex portion having a shape corresponding to the concave portion 41. The convex portion having a shape corresponding to the concave portion 41 can be formed, for example, by pressing or the like on a metal plate or net having a large number of openings.
このようにして製造された吸収体4は、凹部41を有する部分4Aの構成材料(特に繊維材料)の坪量が、他の部分、特に凹部41の両側に位置する部分4B,4Bの坪量よりも小さくなっている一方、凹部41を有する部分4Aの繊維材料の密度は、他の部分、特に凹部41の両側に位置する部分4B,4Bの密度と略等しくなっている。このように、本ナプキン1における吸収体4の凹部41は、吸収体の一部を圧縮して形成したものとは構成が異なっている。
尚、吸収体4の、凹部41を有する部分4Aの厚みは2.5〜7mm、特に2.5〜4mmであることが好ましく、該厚みは、他の部分、特に凹部41の両側に位置する部分4Bの厚みの20〜70%、特に30〜60%であることが好ましい。この厚み比は、部分4Bの厚みが3〜10mmの場合により好ましい。
In the absorbent body 4 manufactured in this manner, the basis weight of the constituent material (particularly fiber material) of the portion 4A having the recess 41 is the basis weight of the other portions, particularly the portions 4B and 4B located on both sides of the recess 41. On the other hand, the density of the fiber material of the portion 4A having the recess 41 is substantially equal to the density of the other portions, particularly the portions 4B and 4B located on both sides of the recess 41. Thus, the recessed part 41 of the absorber 4 in this napkin 1 has a different configuration from that formed by compressing a part of the absorber.
In addition, it is preferable that the thickness of the part 4A which has the recessed part 41 of the absorber 4 is 2.5-7 mm, It is preferable that it is 2.5-4 mm especially, and this thickness is located in the other part, especially the both sides of the recessed part 41. It is preferable that it is 20 to 70%, particularly 30 to 60% of the thickness of the portion 4B. This thickness ratio is more preferable when the thickness of the portion 4B is 3 to 10 mm.
吸収体4がパルプ繊維等の繊維材料を主体として構成されている場合、吸収体4の、凹部41を有する部分4Aの繊維材料の坪量は、50g/m2で以上且つ吸収体4全体の繊維材料の坪量の90%以下、特に80%以下であることが、該部分4A及びその近辺が、着用者の肌に向かって曲面状に突出した形状となりやすいため好ましい。吸収体4全体の繊維材料の坪量は、凹部41を有する部分4Aを含めた吸収体4における繊維材料の総重量を、吸収体4全体の面積で除して求められる。吸収体4全体の繊維材料の坪量は、吸収体4の、凹部41を有する部分4A及びその近辺を、着用者の肌に向かって曲面状に突出した形状に変形させる観点から、100〜350g/m2であることが好ましく、150〜200g/m2であることがより好ましい。ナプキン1における吸収体4は、パルプ繊維を主体として構成されている。 When the absorbent body 4 is mainly composed of a fiber material such as pulp fiber, the basis weight of the fiber material of the portion 4A having the concave portion 41 of the absorbent body 4 is 50 g / m 2 or more and the entire absorbent body 4 It is preferable that the basis weight of the fiber material is 90% or less, particularly 80% or less because the portion 4A and the vicinity thereof tend to have a curved shape toward the wearer's skin. The basis weight of the fiber material of the entire absorbent body 4 is obtained by dividing the total weight of the fiber material in the absorbent body 4 including the portion 4 </ b> A having the recess 41 by the area of the entire absorbent body 4. The basis weight of the fiber material of the absorbent body 4 as a whole is 100 to 350 g from the viewpoint of deforming the portion 4A of the absorbent body 4 having the concave portion 41 and the vicinity thereof into a curved shape toward the wearer's skin. preferably / a m 2, and more preferably a 150 to 200 g / m 2. The absorbent body 4 in the napkin 1 is mainly composed of pulp fibers.
他方、一対の溝42,42は、周面に凸条部が環状に形成されたエンボスロールとアンビルロールとを備えたエンボス装置を用いたエンボス加工により形成されたものであり、より具体的には、両ロール間に、凹部41を有する吸収体4を表面シート2と共に挿通し、該吸収体4の凹部以外の部分を表面シート2と共にエンボスロールの凸条部とアンビルロールの周面との間で熱圧して形成されたものである。溝42の底部には、表面シート2と吸収体4とが一体的に加圧及び加熱されて形成された多数の圧縮部と該圧縮部より凹む程度が小さい部分とが概ね交互に形成されている。溝42は、その幅が1〜5mm程度であり、その深さが2〜10mm程度である。 On the other hand, the pair of grooves 42, 42 is formed by embossing using an embossing device including an embossing roll and an anvil roll in which convex strips are formed annularly on the peripheral surface, and more specifically Is inserted between the two rolls with the absorbent body 4 having the concave portion 41 together with the topsheet 2, and the portions other than the concave portion of the absorbent body 4 together with the topsheet 2 between the convex portion of the embossing roll and the peripheral surface of the anvil roll It is formed by hot pressing between the two. At the bottom of the groove 42, a large number of compression parts formed by integrally pressing and heating the topsheet 2 and the absorbent body 4 and portions that are less recessed than the compression parts are formed approximately alternately. Yes. The groove 42 has a width of about 1 to 5 mm and a depth of about 2 to 10 mm.
本ナプキン1における一対の溝42,42は、図1に示すように、ナプキン1の幅方向に延びる円弧状の連結部43,43を介して互いに連結されて環状の溝を形成している。吸収性物品の長手方向に延びるという表現には、概ね長手方向に延びている場合も含まれ、長手方向と平行なものに限られず、長手方向に対して多少の角度を有していても良く、また、円弧状やサインカーブ状に曲がった曲線状の溝が概ね長手方向に延びていても良い。また、円弧状の連結部43,43を介さずに連結されていなくてもよい。 As shown in FIG. 1, the pair of grooves 42, 42 in the napkin 1 are connected to each other via arcuate connection parts 43, 43 extending in the width direction of the napkin 1 to form an annular groove. The expression of extending in the longitudinal direction of the absorbent article includes a case of extending in the longitudinal direction in general, and is not limited to being parallel to the longitudinal direction, and may have a slight angle with respect to the longitudinal direction. In addition, a curved groove bent in an arc shape or a sine curve shape may extend in the longitudinal direction. Moreover, it does not need to be connected without using the arc-shaped connecting portions 43, 43.
凹部41は、吸収体4の幅方向と同方向の幅W(図2参照)が5〜30mmであり、好ましくは10〜20mmである。凹部41の幅Wが5mm未満であると、凹部41の幅が狭すぎ、吸収体4が小さな曲率で曲がって逆V字形状の凸部を形成し易くなるため、柔軟で良好なフィット感が得られにくくなる。他方、凹部41の幅Wが30mm超であると、凹部41の幅が広すぎて、吸収体4が、凹部41を有する部分において、いびつに変形し易くなり、良好なフィット感や漏れ防止効果が得られにくくなる。 The recess 41 has a width W (see FIG. 2) in the same direction as the width direction of the absorber 4 of 5 to 30 mm, preferably 10 to 20 mm. If the width W of the concave portion 41 is less than 5 mm, the width of the concave portion 41 is too narrow and the absorber 4 is bent with a small curvature so that an inverted V-shaped convex portion is easily formed. It becomes difficult to obtain. On the other hand, if the width W of the concave portion 41 is more than 30 mm, the width of the concave portion 41 is too wide, and the absorber 4 is easily deformed in a portion having the concave portion 41, and has a good fit and leakage prevention effect. Is difficult to obtain.
尚、本ナプキン1における凹部41は、略矩形状であり、その幅が長手方向のどの位置でも同じであるが、凹部41の幅がナプキン1の長手方向において一定でない場合、両足に挟まれる部分、すなわちクロッチ部における凹部41の幅を、凹部の幅とする(後述する幅W1との比についても同様)。 In addition, the recessed part 41 in this napkin 1 is substantially rectangular shape, and the width | variety is the same in any position of a longitudinal direction, but when the width | variety of the recessed part 41 is not constant in the longitudinal direction of the napkin 1, it is the part pinched | interposed into both feet That is, the width of the concave portion 41 in the crotch portion is defined as the width of the concave portion (the same applies to the ratio to the width W1 described later).
また、凹部41の前記幅W(図2参照)は、一対の前記溝42,42間の幅W1(図2参照)の10〜95%であることが好ましく、25〜60%であることがより好ましい。
一対の溝42,42間の幅W1は、該溝42で吸収体をV字形に屈曲させ、吸収体4の凹部41を有する部分4Aを、肌側に向けて突出する形状に変形させる観点、そのV字形の屈曲部を防漏溝として機能させる観点等から、25〜50mmであることが好ましく、35〜40mmであることがより好ましい。上述した幅Wの幅W1に対する好ましい割合は、幅W1の値が上記範囲である場合により好ましい。
The width W (see FIG. 2) of the recess 41 is preferably 10 to 95% of the width W1 (see FIG. 2) between the pair of grooves 42 and 42, and preferably 25 to 60%. More preferred.
The width W1 between the pair of grooves 42, 42 is a viewpoint in which the absorber is bent into a V shape in the groove 42, and the portion 4A having the concave portion 41 of the absorber 4 is deformed into a shape protruding toward the skin side, From the viewpoint of allowing the V-shaped bent portion to function as a leak-proof groove, the thickness is preferably 25 to 50 mm, and more preferably 35 to 40 mm. The preferable ratio of the width W to the width W1 described above is more preferable when the value of the width W1 is in the above range.
また、凹部41は、ナプキン1の長手方向と同方向の長さL(図1参照)が、10mm以上で且つ吸収体4の全長以下であることが好ましく、10〜70mmであることがより好ましい。尚、凹部41が吸収体4の長手方向の全長に亘る場合は、該凹部41は、その底面部の周囲全体が内壁面に囲まれていないものでははないが、そのようなものも凹部である。 Moreover, it is preferable that the length L (refer FIG. 1) of the recessed part 41 and the longitudinal direction of the napkin 1 is 10 mm or more and below the full length of the absorber 4, More preferably, it is 10-70 mm. . In addition, when the recessed part 41 covers the full length of the longitudinal direction of the absorber 4, this recessed part 41 is not what the circumference | surroundings of the bottom face part are not surrounded by the inner wall surface, but such a thing is also a recessed part. is there.
本ナプキン1は、通常のナプキンと同様に、ショーツ等に固定して用いる。本ナプキン1によれば、着用状態において、ナプキン1に幅方向の圧縮力が加わると、図3に示すように、吸収体4の、凹部41の両側に位置する部分4B,4Bが、それぞれ、溝42を軸として略V字状に屈曲するとともに、吸収体4の、凹部41を有する部分4A及びその近辺が、着用者の肌に向かって曲面状に突出した形状に変形する。そのため、ナプキン1の幅方向中央部が、着用時に、良好に且つやさしくフィットするとともに、その両側の溝42部分では、優れた液の捕捉性が発揮されて、優れた横漏れ防止性能が得られる。 The napkin 1 is used by being fixed to shorts or the like in the same manner as a normal napkin. According to the present napkin 1, when a compressive force in the width direction is applied to the napkin 1 in the worn state, the portions 4B and 4B located on both sides of the recess 41 of the absorbent body 4 are respectively shown in FIG. The groove 4 is bent into a substantially V shape around the axis, and the portion 4A of the absorbent body 4 having the recess 41 and the vicinity thereof are deformed into a shape protruding in a curved shape toward the wearer's skin. Therefore, the center part in the width direction of the napkin 1 fits well and gently at the time of wearing, and in the grooves 42 on both sides, excellent liquid trapping properties are exhibited, and excellent lateral leakage prevention performance is obtained. .
次に、本発明の他の実施形態(第2実施形態)である生理用ナプキン1A(以下、ナプキン1Aという)について、図4〜図6を参照して説明する。ナプキン1Aについては、上述したナプキン1と異なる点について主に説明し、同様の点については、同一の符号を付して説明を省略する。特に言及しない点については、上述したナプキン1に関する説明が適宜適用される。 Next, a sanitary napkin 1A (hereinafter referred to as napkin 1A), which is another embodiment (second embodiment) of the present invention, will be described with reference to FIGS. About napkin 1A, a different point from the napkin 1 mentioned above is mainly demonstrated, about the same point, the same code | symbol is attached | subjected and description is abbreviate | omitted. The description regarding the napkin 1 mentioned above is applied suitably about the point which is not mentioned especially.
本ナプキン1Aにおける吸収体4は、図4及び図5に示されるように、上部吸収層44と下部吸収層45とからなる。両吸収層44,45は、何れもパルプ繊維等の繊維材料を主体として構成されている。下部吸収層45は、ナプキン1Aの長手方向と同方向に長い形状を有しており、その長手方向及び幅方向の中央部に略矩形状の開口部(貫通孔)45aを有している。また、下部吸収層45における、開口部45aの両側に位置する部分45b,45bの表面シート2側の面に、長手方向に延びる一対の溝42,42が形成されている。 As shown in FIGS. 4 and 5, the absorbent body 4 in the napkin 1 </ b> A includes an upper absorbent layer 44 and a lower absorbent layer 45. Both absorption layers 44 and 45 are mainly composed of a fiber material such as pulp fiber. The lower absorbent layer 45 has a shape that is long in the same direction as the longitudinal direction of the napkin 1A, and has a substantially rectangular opening (through hole) 45a at the center in the longitudinal direction and the width direction. A pair of grooves 42 and 42 extending in the longitudinal direction are formed on the surface of the lower absorbent layer 45 on the surface sheet 2 side of the portions 45b and 45b located on both sides of the opening 45a.
上部吸収層44は、下部吸収層45より小型に形成されている。より具体的には、開口部45aよりやや大きな矩形状に形成されている。上部吸収層44は、その周縁部を開口部45aの周縁部に重ねた状態で、下部吸収層45上に積層されており、該開口部45aの上部を覆っている。
上部吸収層44は、図5に示すように、ナプキン1Aの幅方向において、一対の溝42,42間の領域Pに位置しており且つ前記開口部45aの両側に跨っている。上部吸収層44は、開口部45aの幅W2より広い幅W3を有しており、該幅W3は、一対の溝42,42間の幅W1より狭い。
The upper absorbent layer 44 is smaller than the lower absorbent layer 45. More specifically, it is formed in a rectangular shape that is slightly larger than the opening 45a. The upper absorbent layer 44 is laminated on the lower absorbent layer 45 with its peripheral edge overlapped with the peripheral edge of the opening 45a, and covers the upper part of the opening 45a.
As shown in FIG. 5, the upper absorbent layer 44 is located in a region P between the pair of grooves 42, 42 and straddles both sides of the opening 45 a in the width direction of the napkin 1 </ b> A. The upper absorption layer 44 has a width W3 wider than the width W2 of the opening 45a, and the width W3 is narrower than the width W1 between the pair of grooves 42 and 42.
着用時に、上部吸収層44を、着用者の肌に向かって曲面状に突出した形状に変形させる観点から、上部吸収層44の幅W3は、開口部45aの幅W2に対する比(W3/W2)が1.2〜9であることが好ましく、より好ましくは2〜3.5である。また、同様の観点から、開口部45aの幅W2は、一対の溝42,42間の幅W1の10〜95%であることが好ましく、より好ましくは25〜60%である。 From the viewpoint of deforming the upper absorbent layer 44 into a shape protruding in a curved shape toward the wearer's skin when worn, the width W3 of the upper absorbent layer 44 is a ratio (W3 / W2) to the width W2 of the opening 45a. Is preferably 1.2 to 9, more preferably 2 to 3.5. From the same viewpoint, the width W2 of the opening 45a is preferably 10 to 95% of the width W1 between the pair of grooves 42 and 42, and more preferably 25 to 60%.
開口部45aの幅W2、上部吸収層44の幅W3及び一対の溝42,42間の領域の幅W1は、例えば、この順に5〜30mm、10〜45mm、25〜50mmとすることができる。前記比(W3/W2)及び前記幅W1に対する前記幅W2の割合の好ましい範囲は、これらの数値との関係においてより好ましく、特に幅W2を10〜20mm、幅W3を20〜35mm、幅1を35〜40mmとした場合により好ましい。 The width W2 of the opening 45a, the width W3 of the upper absorbent layer 44, and the width W1 of the region between the pair of grooves 42 and 42 can be set to 5 to 30 mm, 10 to 45 mm, and 25 to 50 mm, for example. A preferable range of the ratio (W3 / W2) and the ratio of the width W2 to the width W1 is more preferable in relation to these numerical values. In particular, the width W2 is 10 to 20 mm, the width W3 is 20 to 35 mm, and the width 1 is It is more preferable when it is 35-40 mm.
尚、本ナプキン1Aにおける開口部45aは、略矩形状であり、その幅が長手方向のどの位置でも同じであるが、開口部45aの幅がナプキン1の長手方向において一定でない場合、両足に挟まれる部分、すなわちクロッチ部における開口部45aの幅を、凹部の幅とする(上部吸収層44の幅W3及び一対の溝42,42間の領域Pの幅W1についても同様)。 The opening 45a in the napkin 1A has a substantially rectangular shape and the width is the same at any position in the longitudinal direction. However, if the width of the opening 45a is not constant in the longitudinal direction of the napkin 1, the opening 45a is sandwiched between both feet. The width of the opening 45a in the crotch portion is defined as the width of the concave portion (the same applies to the width W3 of the upper absorbent layer 44 and the width W1 of the region P between the pair of grooves 42, 42).
上部吸収層44がパルプ繊維等の繊維材料を主体として構成されている場合、上部吸収層44の繊維材料の坪量は、上部吸収層44に充分な吸収容量を確保すると共に、上部吸収層44を、着用者の肌に向かって曲面状に突出した形状に変形させる観点から、50〜800g/m2であることが好ましく、200〜500g/m2であることがより好ましい。下部吸収層45が繊維材料を主体として構成されている場合、下部吸収層45の繊維材料の坪量(開口部45aの面積を下部吸収層45の面積に含めずに算出)は100〜350g/m2であることが好ましく、150〜250g/m2であることがより好ましい。 When the upper absorbent layer 44 is mainly composed of a fiber material such as pulp fiber, the basis weight of the fiber material of the upper absorbent layer 44 ensures a sufficient absorption capacity for the upper absorbent layer 44 and the upper absorbent layer 44. Is preferably 50 to 800 g / m 2 , more preferably 200 to 500 g / m 2 , from the viewpoint of deforming the shape into a curved shape protruding toward the wearer's skin. When the lower absorbent layer 45 is mainly composed of a fiber material, the basis weight of the fiber material of the lower absorbent layer 45 (calculated without including the area of the opening 45a in the area of the lower absorbent layer 45) is 100 to 350 g / m 2 is preferable, and 150 to 250 g / m 2 is more preferable.
また、開口部45aは、ナプキン1Aの長手方向と同方向の長さL1(図4参照)が、10mm以上で且つ吸収体4の全長未満であることが好ましく、10〜70mmであることがより好ましい。 In addition, the opening 45a preferably has a length L1 (see FIG. 4) in the same direction as the longitudinal direction of the napkin 1A of 10 mm or more and less than the total length of the absorber 4, more preferably 10 to 70 mm. preferable.
本ナプキン1Aによれば、着用状態において、ナプキン1Aに幅方向の圧縮力が加わると、図6に示すように、下部吸収層45の、開口部45aの両側に位置する部分51b,51bが、溝42を軸として略V字状に屈曲するとともに、上部吸収層44が、着用者の肌に向かって曲面状に突出した形状に変形する。そのため、ナプキン1Aの幅方向中央部が、着用時に、良好に且つやさしくフィットするとともに、その両側の溝42部分では、優れた液の捕捉性が発揮されて、優れた横漏れ防止性能が得られる。 According to this napkin 1A, when a compressive force in the width direction is applied to the napkin 1A in the wearing state, as shown in FIG. 6, the portions 51b and 51b of the lower absorbent layer 45 located on both sides of the opening 45a are The upper absorbent layer 44 is deformed into a shape projecting in a curved shape toward the wearer's skin while being bent into a substantially V shape with the groove 42 as an axis. Therefore, the center portion in the width direction of the napkin 1A fits well and gently at the time of wearing, and in the groove portions on both sides, excellent liquid trapping properties are exhibited, and excellent lateral leakage prevention performance is obtained. .
以上、本発明の実施形態について説明したが、本発明は、上記の各実施形態に制限されることなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。
例えば、図7に示す生理用ナプキン1Bのように、第1実施形態における吸収体4上に、第2実施形態における上部吸収層44を積層して、これを吸収体として用いることもできる。この場合、吸収体4の、凹部41を有する部分4A及びその近辺と共に上部吸収層44が、着用者の肌に向かって曲面状に突出した形状に変形し、そのため、上述した、第1及び第2実施形態と同様の作用効果が奏される。図7に示すナプキン1Bにおける、吸収体4の凹部41の幅、上部吸収層44の幅、及び一対の溝42間の幅についての好ましい構成は、第2実施形態における、下部吸収層45の開口部45aの幅、上部吸収層44の幅、及び一対の溝42間の幅についての好ましい構成と同様である。
As mentioned above, although embodiment of this invention was described, this invention can be suitably changed in the range which does not deviate from the meaning of this invention, without being restrict | limited to each said embodiment.
For example, like the sanitary napkin 1B shown in FIG. 7, the upper absorbent layer 44 in the second embodiment can be laminated on the absorbent body 4 in the first embodiment, and this can be used as the absorbent body. In this case, the upper absorbent layer 44 is deformed into a shape that protrudes in a curved shape toward the wearer's skin, together with the portion 4A having the recess 41 and the vicinity thereof of the absorbent body 4, and therefore, the first and first described above. Effects similar to those of the second embodiment are exhibited. In the napkin 1B shown in FIG. 7, a preferable configuration for the width of the recess 41 of the absorber 4, the width of the upper absorbent layer 44, and the width between the pair of grooves 42 is the opening of the lower absorbent layer 45 in the second embodiment. The width of the portion 45a, the width of the upper absorbent layer 44, and the preferred configuration for the width between the pair of grooves 42 are the same.
吸収体4、上部吸収層44及び下部吸収層45としては、パルプ繊維、レーヨン繊維、親水化処理した合成繊維等の繊維材料を主体とした繊維集合体、例えばパルプ繊維を70〜100%含む繊維集合体や、これに吸水性ポリマーを分散状態又は層状態に保持させたもの等を用いることができる。吸収体や、上部吸収層及び下部吸収層は、繊維集合体又はこれに吸水性ポリマーを保持させたもの等を、ティッシュペーパや不織布等の透水性シート材料で被覆したものであっても良い。表面シート2及び裏面シート3としては、生理用ナプキン等の吸収性物品に従来用いられているものを特に制限なく用いることができる。液不透過性の裏面シート3としては、液を完全に透過させないシート材の他、液を透過させにくい性質のものを用いることもできる。
本発明の吸収性物品は、生理用ナプキン又はパンティライナーに特に適している。
As the absorbent body 4, the upper absorbent layer 44, and the lower absorbent layer 45, fiber aggregates mainly composed of fiber materials such as pulp fibers, rayon fibers, and hydrophilized synthetic fibers, for example, fibers containing 70 to 100% pulp fibers Aggregates and those in which a water-absorbing polymer is held in a dispersed state or a layer state can be used. The absorbent body, the upper absorbent layer, and the lower absorbent layer may be formed by coating a fiber assembly or a structure in which a water-absorbing polymer is held with a water-permeable sheet material such as tissue paper or nonwoven fabric. As the top sheet 2 and the back sheet 3, those conventionally used for absorbent articles such as sanitary napkins can be used without particular limitation. As the liquid-impermeable back sheet 3, in addition to a sheet material that does not allow the liquid to completely penetrate, a sheet that does not allow the liquid to permeate can be used.
The absorbent article of the present invention is particularly suitable for sanitary napkins or panty liners.
1 生理用ナプキン(吸収性物品)
2 表面シート
3 裏面シート
4 吸収体
41 凹部
42 溝
44 上部吸収層
45 下部吸収層
45a 開口部
1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Recess 42 Groove 44 Upper absorbent layer 45 Lower absorbent layer 45a Opening
Claims (1)
前記吸収体は、上部吸収層と下部吸収層とからなり、該下部吸収層は、吸収性物品の長手方向と同方向に長い形状を有しており、該下部吸収層は、その長手方向及び幅方向の中央部に、該下部吸収層を厚み方向に貫通する貫通孔の開口部を有すると共に、前記開口部の両側に位置する部分の表面シート側の面に、長手方向に延びる一対の溝を有しており、
前記上部吸収層は、吸収性物品の幅方向において、一対の前記溝間の領域に位置しており、且つ該上部吸収層の周縁部が前記開口部の全周に亘る開口周縁部上に重ねられている吸収性物品。 A liquid-permeable top sheet, a liquid-impermeable back sheet and a liquid-retaining absorbent interposed between both sheets, and an absorbent article formed substantially vertically,
The absorbent body includes an upper absorbent layer and a lower absorbent layer, and the lower absorbent layer has a shape that is long in the same direction as the longitudinal direction of the absorbent article, and the lower absorbent layer has the longitudinal direction and A pair of grooves extending in the longitudinal direction on the surface sheet-side surface of the portion located on both sides of the opening, and having an opening of a through hole penetrating the lower absorbent layer in the thickness direction at the center in the width direction Have
The upper absorbent layer is located in a region between the pair of grooves in the width direction of the absorbent article, and the peripheral edge of the upper absorbent layer is overlapped on the peripheral edge of the opening over the entire circumference of the opening. Absorbent articles.
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