JP2010104545A

JP2010104545A - Absorbent article and method for manufacturing the same

Info

Publication number: JP2010104545A
Application number: JP2008279307A
Authority: JP
Inventors: Yasuhiro Kizawa; 康弘鬼澤; Masao Kurahashi; 昌男倉橋; Satoshi Tanaka; 聰田中; Harumi Miura; 晴美三浦
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2008-10-30
Filing date: 2008-10-30
Publication date: 2010-05-13
Anticipated expiration: 2028-10-30
Also published as: JP5250386B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which suppresses the expanse of an excretion fluid or the like enhances the fluid sucking force toward a lower layer and can obtain a good wearing feeling, and a method for manufacturing the same. <P>SOLUTION: The absorbent article includes a surface sheet 2, a back sheet 3 and the absorber 1 arranged between both sheets 2 and 3. The absorber 1 has a multilayered structure composed of an upper layer part 1a and a lower layer part 1b both of which are formed by folding up both sides of the absorber along the longitudinal direction of the absorber to laminate them and compressed regions (Q) more densified than the central part in the width direction of the upper layer part 1a are provided to the folding-up edge parts on both sides in the width direction of the folded-up absorber and the lower layer part 1b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、液体等を吸収する吸収性物品及びこの吸収性物品を製造する方法に関する。 The present invention relates to an absorbent article that absorbs liquid and the like and a method of manufacturing the absorbent article.

例えば生理用ナプキンやおりもの用のパンティライナ、使い捨ておむつなどの分泌液吸収性物品においては、従来から吸収性やドライ感を向上させるために種々の改良が加えられて今日に至っている。具体的には、肌側に接する表面シート、衣服等に接する裏面シート、これらの両シート間に挟み込まれる吸収体などの各構成部材において要求される機能を高める素材の開発、それらの部材の形態や構造の改良、あるいはそれらの組み合せなどが検討され、試みられてきた。 For example, secretory liquid absorbent articles such as sanitary napkins, panty liners for cages, disposable diapers, and the like have been variously improved in the past in order to improve absorbability and dry feeling. Specifically, the development of materials that enhance the functions required of each component such as a top sheet that contacts the skin side, a back sheet that contacts clothes, and an absorbent body sandwiched between both sheets, and forms of these members Improvements and structural improvements, or combinations thereof have been studied and attempted.

特に吸収体の形態に関するものとして例えば、吸収体心綿で構成したパネルを中央と両側の３区画に区分けし、両側のサイドパネルを中央のミドルパネルの片面側へ折り重ねてコアとなる吸収体を形成したものがある（特許文献１参照）。この吸収体を液透過性カバーで上張りして吸収性物品とする。上記吸収体はその３枚のパネルが等幅になるよう折り畳まれており、このようにすることで、吸収体に機械的曲げ抵抗力を与え、変形、崩壊、またはローピングに抵抗するためのばね力が与えられるとされる。
また、吸収体に、裏面シート側及び／又は表面シート側から陥没する多数の圧縮部が互いに離間して形成されており、圧縮部は液吸収によってその厚みが液吸収前よりも増加するようになされている吸収性物品が開示されている（特許文献２参照）。具体的には、吸収体の片面が陥没するように吸収体材料にエンボス加工を施し、陥没していない平滑面を肌面側に向けて配置した生理用ナプキンである。このような形態の吸収体を採用することにより、表面シートからの液の引き込み性及び吸収ポイント近くでの液の保持性に優れるとされる。
特開平７−１６３６１９号公報特開２００６−５５３５２号公報 In particular, as for the form of the absorbent body, for example, an absorbent body that is composed of an absorbent core and is divided into three sections on the center and both sides, and the side panels on both sides are folded to one side of the middle panel in the middle to form a core (See Patent Document 1). The absorbent body is overlaid with a liquid-permeable cover to obtain an absorbent article. The absorbent body is folded so that the three panels are equal in width, and in this way, a spring is provided to provide mechanical bending resistance to the absorbent body and resist deformation, collapse, or roping. It is said that power is given.
Also, the absorbent body is formed with a large number of compressed parts that are recessed from the back sheet side and / or the top sheet side so as to be spaced apart from each other so that the thickness of the compressed part is increased by liquid absorption than before liquid absorption. An absorbent article made is disclosed (see Patent Document 2). Specifically, it is a sanitary napkin in which an absorbent material is embossed so that one side of the absorbent body is depressed, and a smooth surface that is not depressed is disposed toward the skin surface side. By adopting the absorbent body in such a form, it is considered that the liquid drawability from the top sheet and the liquid retention near the absorption point are excellent.
JP-A-7-163619 JP 2006-55352 A

しかしながら、上記の吸収体を適用した生理用ナプキンでもいまだ十分とはいえず、肌のデリケートな部分に直接当てて通常用いられるこの種の吸収性物品において、着用感を一層良化し、しかも高い吸収保持性を実現するよう、さらなる改良開発が望まれる。
本発明の課題は上記の点に鑑み、排泄液等の拡がりを抑え、下層側への液引込み力を向上させ、しかも良好な装着間が得られる吸収性物品及びこの製造方法を提供することにある。 However, even a sanitary napkin to which the above-mentioned absorbent body is applied is still not sufficient, and in this type of absorbent article that is usually used by directly applying it to a delicate part of the skin, the feeling of wear is further improved and high absorption is achieved. Further improved development is desired to achieve retention.
In view of the above points, an object of the present invention is to provide an absorbent article that suppresses the spread of excretory fluid and the like, improves the liquid drawing force to the lower layer side, and provides a good wearing space, and a method for manufacturing the same. is there.

本発明は、表面シートと、裏面シートと、前記両シートの間に配置された吸収体とを有する吸収性物品であって、前記吸収体は、吸収体長手方向に沿って吸収体の両側方が折り畳まれて積層された上層部と下層部との多層構造を有し、その折り畳まれた吸収体の幅方向両側の折り畳み縁部および前記下層部には前記上層部の幅方向中央部よりも高密度化された圧縮領域がある吸収性物品に関する。 The present invention is an absorbent article having a top sheet, a back sheet, and an absorbent body disposed between the two sheets, wherein the absorbent body is disposed on both sides of the absorbent body along the longitudinal direction of the absorbent body. Has a multilayer structure of an upper layer portion and a lower layer portion that are folded and stacked, and the folded edges on both sides in the width direction of the folded absorbent body and the lower layer portion are more than the center portion in the width direction of the upper layer portion. The present invention relates to an absorbent article having a densified compressed region.

また、上記の吸収性物品は、表面シートと、裏面シートと、前記両シートの間に配置された吸収体とを有する吸収性物品の製造方法であって、前記吸収体を形成するに当たり、繊維シート上にフラッフパルプを積繊して積繊体を形成し、この積繊体の側部領域に沿うように高密度化による圧縮加工を施した後、該圧縮加工された領域内の部分を折り畳み線として前記積繊体の片面側へ折り畳んで、前記折り畳み線及びその近傍の折り畳み縁部並びにその積繊体外方に延在する折り畳み部に前記圧縮加工された領域を有する吸収体とする吸収性物品の製造方法により好適に製造される。 Further, the above absorbent article is a method for manufacturing an absorbent article having a top sheet, a back sheet, and an absorbent body disposed between the two sheets. A fluff pulp is stacked on a sheet to form a stacked fiber body, and after compressing by densification along the side area of the stacked fiber body, a portion in the compressed region is formed. Folding as a fold line to one side of the stacked fiber body, an absorption body having the compressed region at the fold line and a fold edge in the vicinity thereof and a fold part extending outward of the stacked fiber body It is preferably manufactured by a method for manufacturing a functional article.

本発明の吸収性物品は、吸収体の表面シート側では排泄液の拡がりを抑えながら下層側への高い液引き込み力を有することで、表面シートの液残り量を少なくしてドライ感が向上し、また、吸収体の折り畳み構造により良好な装着感が得られるという優れた作用効果を奏する。また、本発明による製造方法によれば、上記の吸収性物品を連続搬送ライン上で安定かつ効率的に製造することができる。 The absorbent article of the present invention has a high liquid drawing force to the lower layer side while suppressing the spread of excretory liquid on the surface sheet side of the absorber, thereby reducing the amount of liquid remaining on the surface sheet and improving the dry feeling. In addition, an excellent operational effect is obtained in that a good wearing feeling can be obtained by the folding structure of the absorber. Moreover, according to the manufacturing method by this invention, said absorbent article can be manufactured stably and efficiently on a continuous conveyance line.

本発明の実施形態を説明するに先立ち、本発明で用いられる幾つかの用語について、その定義を以下に記載する。 Prior to describing the embodiments of the present invention, definitions of some terms used in the present invention are described below.

まず、本発明において、「高密度化」とは、繊維から構成される構造部材を圧縮して、その領域について繊維密度をより高めることをいう。例えば、一対のロールによる押圧加工やロールエンボスロール乃至これをフラットロールとの組合せによるエンボス加工等が挙げられ、エンボス加工やギアロールにより凹凸賦形して、繊維密度をより高める「凹凸高密度化」、すなわち凹部及び凸部をあわせた領域全体として高密度化することが柔軟性や液拡散性等の観点から好ましい。「繊維密度」とは、繊維部材の所定領域における単位体積当りの繊維質量をいう。このときの所定領域は規定する部材や構造部において任意に定められる。 First, in the present invention, “densification” refers to compressing a structural member composed of fibers and increasing the fiber density in the region. For example, press working with a pair of rolls or embossing rolls in combination with a flat roll or the like, and embossing with embossing or gear rolls to form irregularities, increasing the density of the irregularities. That is, it is preferable from the viewpoints of flexibility, liquid diffusibility, and the like to increase the density of the entire region including the concave portion and the convex portion. “Fiber density” refers to the fiber mass per unit volume in a predetermined region of the fiber member. The predetermined area at this time is arbitrarily determined by a member or a structure part to be defined.

本発明において「積層」するとは、２つの部材が接しながら積層することのほか、両部材間の間に他のシート部材や接着剤等を介在させることも含む。そして本発明の吸収性物品においては、上層部と下層部とが積層するが、平面視において下層部は上層部の少なくとも一部に積層していればよく、液体等の吸収機能を考慮したとき、吸収体幅方向中央部において積層していることが好ましい。このことは下層部中間層及び下層部裏面側層についても同様である。 In the present invention, “lamination” includes not only the lamination of two members in contact with each other but also the interposition of another sheet member or an adhesive between the two members. And in the absorbent article of the present invention, the upper layer part and the lower layer part are laminated, but the lower layer part only needs to be laminated on at least a part of the upper layer part in a plan view, and when taking into account the absorption function of liquid etc. In addition, it is preferable to laminate at the central portion in the absorber width direction. The same applies to the lower layer intermediate layer and the lower layer back side layer.

以下に本発明を実施形態および具体的な実施例に基づき説明するが、本発明はこれらにより限定して解釈されるものではない。 The present invention will be described below based on embodiments and specific examples, but the present invention should not be construed as being limited thereto.

図１は本発明の好ましい実施形態（実施形態１）としての生理用ナプキンを一部分破断して示した斜視図である。また図２（ａ）は図１のＩＩ−ＩＩ線に沿った拡大断面図、図２（ｂ）は図２（ａ）のＡ部の拡大図であり、吸収体内部における液の引き込み形態及び各層どうしの接触状態を示したものである。この実施形態１の生理用ナプキン１０は、パルプ積繊体と繊維シート（図示せず）とで構成された吸収体１と、この吸収体１を挟むように包囲する液透過性の表面シート２及び裏面シート３と、吸収体１の長手方向に沿う両縁部を巻き込むように該両縁部に張り付けられるサイドシート４とを有して構成されている。なお、前記パルプ積繊体は前記繊維シートによって挟み込むようにして包まれていてもよい。 FIG. 1 is a perspective view of a sanitary napkin according to a preferred embodiment (Embodiment 1) of the present invention, partially broken away. 2A is an enlarged cross-sectional view taken along line II-II in FIG. 1, and FIG. 2B is an enlarged view of portion A in FIG. 2A. The contact state of each layer is shown. The sanitary napkin 10 according to the first embodiment includes an absorbent body 1 composed of a pulp pile and a fiber sheet (not shown), and a liquid-permeable surface sheet 2 that surrounds the absorbent body 1 so as to sandwich the absorbent body 1. And the back sheet 3 and the side sheet | seat 4 affixed on these both edges so that both the edges along the longitudinal direction of the absorber 1 may be wound are comprised. In addition, the said pulp pile fiber body may be wrapped so that it may be pinched | interposed with the said fiber sheet.

表面シート２は、吸収性物品である生理用ナプキン１０の使用時における肌側に接する面を形成している。そして、生理用ナプキン１０は使用者の正面側から背面側へ長く延び、この方向をここでは長手方向（Ｙ方向）と称する。これに対して、これと交差する方向を生理用ナプキン１０の幅方向（Ｘ方向）とする。吸収体１の長手方向（Ｙ方向）は、生理用ナプキン１０の長手方向（Ｙ方向）と同じ方向である。裏面シート３は、生理用ナプキン１０の使用時における衣服（下着）に接する面を形成している。前記長手方向において、表面シート２、裏面シート３およびサイドシート４はほぼ同じ長さに形成されるが、吸収体１の長さよりはやや長くなっている。また、吸収体１の横幅を画成するように前記長手方向に沿う側部を吸収体１の縁または折り畳み縁部と称する。なお、以下の記載において、説明の必要上、吸収体１の表面シート側の面を吸収体１の表面あるいは上面、または上側の面、吸収体１の裏面シート側の面を吸収体１の裏面あるいは下面、または下側の面と称することもある。裏面シート３の下着に接する面は粘着性が付与されており、これによって使用時には下着に固定される。 The surface sheet 2 forms a surface in contact with the skin side when the sanitary napkin 10 that is an absorbent article is used. The sanitary napkin 10 extends long from the front side to the back side of the user, and this direction is referred to herein as the longitudinal direction (Y direction). On the other hand, the direction crossing this is defined as the width direction (X direction) of the sanitary napkin 10. The longitudinal direction (Y direction) of the absorbent body 1 is the same direction as the longitudinal direction (Y direction) of the sanitary napkin 10. The back sheet 3 forms a surface in contact with clothes (underwear) when the sanitary napkin 10 is used. In the longitudinal direction, the top sheet 2, the back sheet 3, and the side sheet 4 are formed to have substantially the same length, but are slightly longer than the length of the absorber 1. Moreover, the side part along the longitudinal direction so as to define the lateral width of the absorbent body 1 is referred to as an edge of the absorbent body 1 or a folded edge part. In the following description, for the purpose of explanation, the surface on the top sheet side of the absorber 1 is the surface or top surface of the absorber 1 or the upper surface, and the surface on the back sheet side of the absorber 1 is the back surface of the absorber 1. Or it may be called a lower surface or a lower surface. The surface in contact with the underwear of the back sheet 3 is given adhesiveness, and is thereby fixed to the underwear during use.

図１および図２に示すように、表面シート２は、サイドシート４の外側を包んで吸収体１の表面から両縁部を巻き込むようにして吸収体１の裏面の一部にかけて部分的に延在している。裏面シート３は、吸収体１の裏面へ部分的に延びた表面シート２に被さるように吸収体１の裏面に張り付けられる。裏面シート３は吸収体１の横幅とほぼ等しい横幅を有している。 As shown in FIG. 1 and FIG. 2, the top sheet 2 partially extends over a part of the back surface of the absorbent body 1 so as to wrap around the outside of the side sheet 4 and wrap both edges from the front surface of the absorbent body 1. Exist. The back sheet 3 is attached to the back surface of the absorber 1 so as to cover the top sheet 2 partially extending to the back surface of the absorber 1. The back sheet 3 has a width substantially equal to the width of the absorber 1.

吸収体１をサイドシート４ともに表面シート２と裏面シート３との間に確実に保持するように、両シート２，３が生理用ナプキン１０の長手方向に線状に塗布されたホットメルト型接着剤によって接合されている。なお、ホットメルト型接着剤の塗布方法は特に限定されないが、線状に塗布するビード法の他、スパイラル法、スロットスプレー法など接合による違和感のないように塗布面積を少なくまたは塗布後に柔軟性を喪失しない少量塗布できる方法が好ましい。また、表面シート２と裏面シート３はサイドシート４とともに、生理用ナプキン１０の長手方向端部においてエンドシール１２を形成するよう、ヒートシールや接着剤等により互いに接合されている。 Hot melt adhesive in which both sheets 2 and 3 are applied linearly in the longitudinal direction of the sanitary napkin 10 so that the absorbent body 1 is securely held between the top sheet 2 and the back sheet 3 together with the side sheets 4. It is joined by the agent. The method of applying the hot melt adhesive is not particularly limited, but in addition to the bead method of applying in a linear manner, the application area is reduced or flexibility after application such as spiral method, slot spray method, etc. A method that can be applied in a small amount without loss is preferred. Further, the top sheet 2 and the back sheet 3 are joined together with the side sheet 4 by heat sealing, an adhesive or the like so as to form an end seal 12 at the longitudinal end of the sanitary napkin 10.

吸収体１の詳細な構造についてはさらに後述するが、実施形態１では吸収体１は３層構造となっており、全体として柔軟性及びクッション性があり、フィット感及び安心感を与える厚みと吸収性とのバランスが確保される。 Although the detailed structure of the absorbent body 1 will be described later, in the first embodiment, the absorbent body 1 has a three-layer structure, which has flexibility and cushioning as a whole, and has a thickness and absorption that provide a feeling of fit and security. Balance with sex is secured.

図２を参照すれば、吸収体１は表面シート２を介して着用者の肌側に位置する上層部１ａと、裏面シート３を介して着用者の下着側にある下層部１ｂとの積層体で構成され、下層部１ｂは、さらに、図面右側から折り畳まれ上層部１ａの裏面に重ねられる下層部中間層（右側下層部）１ｃと、右側から折り畳まれ下層部中間層１ｃの裏面に重ねられる下層部裏面側層（左側下層部）１ｄとを有している。すなわち、下層部中間層１ｃは吸収体１の長手方向に沿う一方(右側)の縁部１ｓで上層部１ａに連なり、下層部裏面側層１ｄは吸収体１の長手方向に沿う他方（左側）の縁部１ｓで上層部１ａに連なっている（この左右の区別は固定的なものではなく看る方向による入れ替わることは言うまでもない。）。より具体的には、図３に示すような１枚の矩形平板状吸収体１１の一方の側方部分１Ｃが折り畳み線ｅの位置で矩形平板状吸収体１１の中央部分１Ａに重なるように折り畳み、この折り畳まれた前記側方部分１Ｃに重なるように矩形平板状吸収体１１の他方の側方部分１Ｄが折り畳み線ｆの位置で折り畳まれて図２に示す吸収性物品の吸収体１となる。ここで縁部１ｓは折り畳まれた吸収体の湾曲ないし屈曲した側方部分をいい、他方、中央部１ｔは上記側部１ｓ以外の折り畳まれた吸収体の中央側の部分をいう。これら両部（１ｓ、１ｔ）の区画は限定的なものではなく機能的に定められればよい。なお図２では上記両部を波括弧で概略的に示したがこれは吸収体１の領域的区分を示すものである。
本実施形態においては、吸収体の下層部中間層１ｃ及び下層部裏面側層１ｄのエンボス賦形された部分（エンボス部５）には凹溝７が形成されており、吸収体の上層部１ａと下層部中間層１ｃとがこの凹溝７の部分で断面方向に離間するように積層されている。また、前記下層部中間層１ｃと前記下層部裏面側層１ｄともまた該両層の凹溝７の部分で断面方向に離間するように積層されている。 Referring to FIG. 2, the absorbent body 1 is a laminate of an upper layer portion 1 a located on the skin side of the wearer via the top sheet 2 and a lower layer portion 1 b on the underwear side of the wearer via the back sheet 3. The lower layer portion 1b is further folded from the right side of the drawing and overlapped on the back surface of the upper layer portion 1a. And a lower layer rear surface side layer (left lower layer part) 1d. That is, the lower layer intermediate layer 1c is connected to the upper layer portion 1a at one edge portion 1s along the longitudinal direction of the absorber 1 (right side), and the lower layer rear surface side layer 1d is the other portion (left side) along the longitudinal direction of the absorber 1. The left and right edge portions 1s are connected to the upper layer portion 1a (this right / left distinction is not fixed and it is needless to say that it is switched depending on the viewing direction). More specifically, one side portion 1C of one rectangular flat plate absorbent body 11 as shown in FIG. 3 is folded so as to overlap the central portion 1A of the rectangular flat plate absorbent body 11 at the position of the folding line e. The other side portion 1D of the rectangular flat plate-shaped absorbent body 11 is folded at the position of the fold line f so as to overlap the folded side portion 1C to form the absorbent body 1 of the absorbent article shown in FIG. . Here, the edge 1s refers to a bent or bent side portion of the folded absorbent body, while the central portion 1t refers to a central portion of the folded absorbent body other than the side portion 1s. The sections of these two parts (1s, 1t) are not limited and may be determined functionally. In FIG. 2, both the above parts are schematically indicated by curly brackets, but this indicates a regional division of the absorber 1.
In the present embodiment, a groove 7 is formed in the embossed portion (embossed portion 5) of the lower layer intermediate layer 1c and the lower layer back side layer 1d of the absorber, and the upper layer portion 1a of the absorber. And the lower layer intermediate layer 1c are laminated so as to be separated in the cross-sectional direction at the portion of the concave groove 7. Further, the lower layer intermediate layer 1c and the lower layer back side layer 1d are also laminated so as to be separated in the cross-sectional direction at the concave groove portions 7 of both layers.

次に、実施形態１における矩形平板状吸収体１１及びこの吸収体１１に形成されるエンボス部５について図３〜図５を参照して説明する。
矩形平板状吸収体１１は紙や不織布のような繊維シート（図示せず）上に積繊された略均一な坪量を有するパルプ積繊体で形成されている。そして、吸収体１の上層部１ａに対応する中央部分１Ａは、ほぼその全域において、後述する高密度化された圧縮領域Ｑを有する両側方部分１Ｄ，１Ｃに対して薄くならずに厚さが維持されている。このとき、左側の側方部分１Ｄの厚みは右側の側方部分１Ｃよりも若干薄く形成されており、これらの側方部分１Ｃ、１Ｄがそれぞれ吸収体１の下層部中間層（右側下層部）１ｃ及び下層部裏面側層（左側下層部）１ｄに対応する。また、中央部１Ａ、両側方部分１Ｃ，１Ｄは同じ坪量である。このようにして、本実施形態の生理用ナプキンにおいては、肌側に配される上層部１ａ（中央部分１Ａ）はそのパルプ繊維の坪量に応じた十分な厚みが維持されるため、ふわふわとした柔らかい肌当たりが実現される。 Next, the rectangular flat-plate-shaped absorber 11 and the embossed part 5 formed in this absorber 11 in Embodiment 1 are demonstrated with reference to FIGS.
The rectangular flat absorbent body 11 is formed of a pulp piled body having a substantially uniform basis weight piled on a fiber sheet (not shown) such as paper or a nonwoven fabric. The central portion 1A corresponding to the upper layer portion 1a of the absorbent body 1 has a thickness that is not thin relative to both side portions 1D and 1C having a high-density compressed region Q, which will be described later. Maintained. At this time, the thickness of the left side portion 1D is slightly thinner than that of the right side portion 1C, and these side portions 1C and 1D are respectively lower layer intermediate layers (right lower layer portions) of the absorber 1. 1c and the lower layer back side layer (left lower layer) 1d. Further, the central portion 1A and the side portions 1C and 1D have the same basis weight. Thus, in the sanitary napkin of this embodiment, since the upper layer part 1a (center part 1A) distribute | arranged to the skin side maintains sufficient thickness according to the basic weight of the pulp fiber, it is fluffy. Soft skin contact is realized.

本発明の実施形態１では、圧縮領域Ｑはエンボス部５とエンボス加工のなされない非エンボス部６とを有し、凹凸高密度化されている。エンボス部５が高密度部であり、非エンボス部６が非高密度部であり、本発明の実施形態１では、エンボス部５により領域Ｑ全体として、高密度化されている。矩形平板状吸収体１１に形成されるエンボス部５は、凹溝７となり、高圧搾部５ａと低圧搾部５ｂが交互に配された線状エンボス部５となっており、左右の側方部分１Ｃ，１Ｄの線状エンボス部５は幅方向（Ｘ方向）に異なるピッチで形成されている。具体的には、一方（左側）の側方部分１Ｄの線状エンボス部５は互いのピッチが密な１０本の線状エンボス部５が形成され、他方（右側）の側方部分１Ｃの線状エンボス部５は側方部分１Ｄに比べて互いのピッチが粗な８本の線状エンボス部５が形成されている。矩形平板状吸収体１１における折り畳み線ｅ，ｆのそれぞれの近傍を除く中央部分（折りたたまれて吸収体上層の中央部１ｔとなる部分）にはエンボス部５が形成されていない。なお、非エンボス部６は、エンボス部５の形成によって、厚みが薄くなり密度が高くなる場合があるが、エンボス部５の低圧搾部５ｂよりは厚みが厚く低密度であり、便宜的に非エンボス部と称す。 In Embodiment 1 of this invention, the compression area | region Q has the embossed part 5 and the non-embossed part 6 which is not made embossing, and is densified and densified. The embossed part 5 is a high-density part, and the non-embossed part 6 is a non-high-density part. In the first embodiment of the present invention, the embossed part 5 as a whole has a high density. The embossed part 5 formed in the rectangular plate-shaped absorbent body 11 is a concave groove 7, which is a linear embossed part 5 in which high pressing parts 5 a and low pressing parts 5 b are alternately arranged, and left and right side portions. The linear embossed portions 5 of 1C and 1D are formed at different pitches in the width direction (X direction). Specifically, the linear embossed portion 5 of one (left side) side portion 1D is formed with ten linear embossed portions 5 having a dense pitch, and the other (right side) side portion 1C line. The linear embossed portion 5 is formed with eight linear embossed portions 5 having a coarser pitch than the side portion 1D. The embossed part 5 is not formed in the central part (the part which is folded and becomes the central part 1t of the absorber upper layer) excluding the vicinity of the folding lines e and f in the rectangular flat absorbent body 11. The non-embossed portion 6 may be thinner and higher in density due to the formation of the embossed portion 5, but is thicker and lower in density than the low-pressure squeezed portion 5 b of the embossed portion 5. This is called the embossed part.

このように異なるピッチのエンボス部５をもつ矩形平板状吸収体１１の側方部分１Ｃ，１Ｄを繊維シートの無い側の中央部分１Ａに重なるように折り畳むことによって、上層部１ａと下層部中間層１ｃと下層部裏面側層１ｄの３層構造の吸収体１となり、上層部１ａから下層部１ｂにかけて密度勾配が形成される。具体的には、下層部中間層１ｃの密度より下層部裏面側層１ｄの密度が高く、エンボス部のない上層部１ａは低密度、下層部中間層１ｃが中密度、下層部裏面側層１ｄが高密度の密度勾配をもつ形態となる。このように吸収体全体としては、下層に向うにしたがって吸収体１の密度が高くなるので、上層部表面の液が少量〜多量でも下層側への液引込み性が高く、良好なドライ感が得られる。 Thus, the upper layer portion 1a and the lower layer intermediate layer are folded by folding the side portions 1C and 1D of the rectangular plate-like absorbent body 11 having the embossed portions 5 having different pitches so as to overlap the central portion 1A on the side without the fiber sheet. The absorber 1 has a three-layer structure of 1c and a lower layer back side layer 1d, and a density gradient is formed from the upper layer 1a to the lower layer 1b. Specifically, the density of the lower layer back side layer 1d is higher than the density of the lower layer intermediate layer 1c, the upper layer 1a without the embossed portion is low density, the lower layer intermediate layer 1c is medium density, and the lower layer back side layer 1d. Have a high density gradient. Thus, since the density of the absorber 1 increases as it goes to the lower layer as a whole, the liquid drawing property to the lower layer side is high even if the amount of liquid on the upper layer surface is small to large, and a good dry feeling is obtained. It is done.

ここで、高密度あるいは中、低密度のように密度を調整する手段としては、例えばエンボス部５の配置密度を変えることで密度の調整が可能である。実施形態１の例では、側方部分１Ｃのエンボス部５を密に配置することで厚みが薄くなってエンボス賦形された領域全体として高密度となる。そのほか、エンボス部５のピッチは同じにして、エンボス部５の深さを深くしたり、大きさ（エンボスの幅）を広くしたりすることによっても領域的に高密度とすることができ、このようにしてエンボス部５の配置ピッチ、深さあるいは大きさによって下層部の所定領域の密度は調整可能である。
なお、吸収体の厚さは、圧縮領域Ｑを形成する際に制御してもよく、側方部分１Ｃ，１Ｄは全体厚さを薄くした後に、エンボス加工で凹凸高密度化を施してもよい。 Here, as means for adjusting the density such as high density, medium density, and low density, for example, the density can be adjusted by changing the arrangement density of the embossed portions 5. In the example of the first embodiment, the embossed portions 5 of the side portions 1C are densely arranged, so that the thickness is reduced and the embossed region as a whole has a high density. In addition, the pitch of the embossed part 5 can be made the same, and the embossed part 5 can be made high in area by increasing the depth of the embossed part 5 or increasing the size (the width of the embossed part). In this way, the density of the predetermined region in the lower layer can be adjusted by the arrangement pitch, depth, or size of the embossed portions 5.
The thickness of the absorber may be controlled when forming the compression region Q, and the side portions 1C and 1D may be subjected to embossing to increase the density of the unevenness after the entire thickness is reduced. .

両側方部分１Ｃ，１Ｄは中央部分１Ａに近いエンボス加工した位置（折り畳み線ｅ，ｆの位置）でエンボス部５の延びる方向と同方向に下側へ折り曲げられるので、折り畳みがきわめて円滑になされ、しかも、この折り曲げ部分に当たる吸収体縁部のエンボス部５によって吸収体の横幅方向への液漏れが阻止される。さらに、矩形平板状吸収体１１の中央部分１Ａは両側方部分１Ｃ，１Ｄよりも厚みが大となっているので、側方部分１Ｃ，１Ｄを折り曲げた際に折曲げ部内側、つまり吸収体１の折り畳み縁部の内側に空洞部９（図２）が生じ、この空洞部９と折り畳み縁部の湾曲形態とにより、吸収体縁部１ｓによるクッション性も確保され、また着用者の装着部の動きに対する良好な追従性が得られ、違和感が生じない。 Since the side portions 1C and 1D are bent downward in the same direction as the direction in which the embossed portion 5 extends at the embossed position (the positions of the folding lines e and f) close to the central portion 1A, the folding is performed extremely smoothly. Moreover, liquid leakage in the lateral width direction of the absorber is prevented by the embossed portion 5 at the edge of the absorber hitting the bent portion. Further, since the central portion 1A of the rectangular plate-shaped absorber 11 is thicker than the side portions 1C and 1D, when the side portions 1C and 1D are bent, the inside of the bent portion, that is, the absorber 1 is formed. A cavity portion 9 (FIG. 2) is formed inside the folding edge of the body, and the cushioning property by the absorbent body edge portion 1s is ensured by the cavity portion 9 and the curved form of the folding edge portion. Good followability to the movement is obtained, and there is no sense of incongruity.

図３における折り畳み線ｅ，ｆの近傍領域の幅は吸収体１の折り畳み縁部１ｓの湾曲長さに対応している。したがって本発明の吸収性物品においては、少なくとも吸収体の折り畳み縁部および下層部は高密度化されているが、下層部において高密度化された圧縮領域の大きさは特に限定されない。しかし、例えば、折り畳む前の矩形平板形状の吸収体１１の側方における圧縮領域Ｑ（図３参照）の部分を折り畳んで吸収性物品の吸収体１としたときに、吸収体１の下層部１ｂにおける圧縮領域は上層部１ａの全幅に対応する領域（中央部分１Ａ）にほぼ均等に配設することが好ましい。圧縮領域Ｑの長手方向（Ｙ方向）の大きさは特に限定されないが、本実施形態のように吸収体長手方向の少なくとも中央部を含む領域に配設すること、あるいは長手方向の全域に延びるように配設することが好ましい。 The width of the region near the fold lines e and f in FIG. 3 corresponds to the curved length of the fold edge 1 s of the absorber 1. Therefore, in the absorbent article of the present invention, at least the folding edge and the lower layer of the absorbent body are densified, but the size of the compressed region densified at the lower layer is not particularly limited. However, for example, when the portion of the compression region Q (see FIG. 3) on the side of the rectangular plate-shaped absorbent body 11 before being folded is folded into the absorbent body 1 of the absorbent article, the lower layer portion 1b of the absorbent body 1 It is preferable that the compression region is substantially evenly disposed in a region (central portion 1A) corresponding to the entire width of the upper layer portion 1a. The size of the compression region Q in the longitudinal direction (Y direction) is not particularly limited. However, the compression region Q is disposed in a region including at least the central portion in the longitudinal direction of the absorber as in the present embodiment, or extends in the entire longitudinal direction. It is preferable to arrange in.

なお、本発明の吸収性物品において、吸収体の折り畳み縁部から下層部にかけての「高密度化率」もしくは「エンボス率」は特に限定されないが、必要によりエンボス等が施されて高密度化された圧縮領域において１０〜７０％であることが好ましく、３０〜５０％が一層好ましい。ここで、「高密度化率」もしくは「エンボス率」とは、対象となる部材の高密度化された圧縮領域Ｑ全体の面積Ｓに含まれる「圧縮領域Ｑ内の高密度化された部分（高密度化部）」もしくは「エンボス部」の面積ａの総和の比率（Σａ／Ｓ）をいう。 In the absorbent article of the present invention, the “densification rate” or “embossing rate” from the folded edge portion to the lower layer portion of the absorbent body is not particularly limited. In the compressed region, it is preferably 10 to 70%, more preferably 30 to 50%. Here, the “densification rate” or the “embossing rate” refers to the “densified part in the compression region Q (included in the area S of the entire compression region Q of the densified member ( The ratio (Σa / S) of the sum of the areas a of the “densified part” or “embossed part”.

実施形態１における吸収体１の線状エンボス部５は図３及び図４、図５に示すように、深さの浅い低圧搾部５ｂと、これより深さの深い高圧搾部５ａとが交互に線状に並んだ形態となっており、また、深さの浅い低圧搾部５ｂの長さＲａは深さの深い高圧搾部５ａの長さＲｂよりも若干長くなっている。しかし、この長さの違いは本発明において必ずしも必須のものではなく、両者の長さは同じであってもよい。線状エンボス部５は生理用ナプキン１０の長手方向に延び、かつ線状エンボス部５の長手方向は生理用ナプキンの長手方向（Ｙ方向）と同じ方向である。 As shown in FIGS. 3, 4, and 5, the linear embossed portion 5 of the absorbent body 1 according to the first embodiment includes alternating low-pressure parts 5 b having shallow depths and high-pressure parts 5 a having deeper depths. Further, the length Ra of the shallow pressing portion 5b is slightly longer than the length Rb of the deep pressing portion 5a. However, this difference in length is not necessarily essential in the present invention, and the lengths of both may be the same. The linear embossed portion 5 extends in the longitudinal direction of the sanitary napkin 10, and the longitudinal direction of the linear embossed portion 5 is the same as the longitudinal direction (Y direction) of the sanitary napkin.

図３に明示されるように、線状エンボス部５の生理用ナプキン長手方向（Ｙ方向）における矩形平板状吸収体１１の両端部はエンボス加工されない非エンボス部となっている。また、この長手方向に対して幅方向（Ｘ方向）においては、折り畳み線ｅを含むその近傍部位、及び折り畳み線ｆを含むその近傍部位における線状エンボス部５の本数は同数となっている。しかし、この形態も本発明においては必ずしも必須のものではなく、折り畳み線ｅ，ｆ付近の線状エンボス部の本数は若干異なっていてもよい As clearly shown in FIG. 3, both end portions of the rectangular plate-like absorbent body 11 in the longitudinal direction (Y direction) of the sanitary napkin of the linear embossed portion 5 are non-embossed portions that are not embossed. Further, in the width direction (X direction) with respect to the longitudinal direction, the number of the linear embossed portions 5 in the vicinity portion including the fold line e and the vicinity portion including the fold line f is the same. However, this configuration is not necessarily essential in the present invention, and the number of linear embossed portions near the folding lines e and f may be slightly different.

矩形平板状吸収体１１で線状エンボス部５の圧搾部の横幅（溝幅）Ｒｃはエンボス数の多い方の側方部分１Ｄと少ない方の側方部分１Ｃとで互いに等しくなっている。そして、これらの両側方部分１Ｃ，１Ｄにおいて線状エンボス部５どうしの中間部分の幅、即ちエンボス加工のなされない非エンボス部６の幅長さＲｄは線状エンボス部５の圧搾部の横幅（溝幅）Ｒｃよりも幾分長くなっている（図４）。 The lateral width (groove width) Rc of the compressed portion of the linear embossed portion 5 in the rectangular plate-shaped absorbent body 11 is equal between the side portion 1D having a larger emboss number and the side portion 1C having a smaller embossed number. And in these both side parts 1C and 1D, the width | variety of the intermediate part of the linear embossed part 5, ie, the width length Rd of the non-embossed part 6 which is not embossed, is the width of the pressing part of the linear embossed part 5 ( The groove width is somewhat longer than Rc (FIG. 4).

線状エンボス部の場合、その幅や長さは吸収性物品の種類等により適宜設定すればよく特に限定されない。例えば一般的な生理用ナプキンについていうと、エンボス部の幅Ｒｃを１〜１０ｍｍとするこが好ましく、長さを３〜８ｍｍとすることこが好ましい。また、エンボス部の幅方向の間隔（エンボスの幅方向ピッチ、Ｒｃ＋Ｒｄ、図４）は１〜５ｍｍの範囲とするのが好ましい。吸収体の折り曲げ部分の前後あるいはエンボスの間の前後部分の坪量は５０〜２００ｇ／ｍ^２とすることが好ましい。エンボス形態としては線状エンボス以外にも円形状／三角形状などの圧搾部分が長手に連なり実質的に線状となっている、または圧搾部分が長手方向に長く線状の挙動を発現するパターンなどが挙げられる。
また、エンボス深さを深くすること／エンボスの形状を大きくすること／エンボスピッチを小さくすることによって高密度化を図ることができ、これらを組み合わせることで上層部で低密度、下層部中央層で中密度、下層部裏面側層で高密度などの構成が可能となる。 In the case of the linear embossed portion, the width and length may be appropriately set depending on the type of the absorbent article and the like, and are not particularly limited. For example, regarding a general sanitary napkin, the width Rc of the embossed portion is preferably 1 to 10 mm, and the length is preferably 3 to 8 mm. Moreover, it is preferable to make the space | interval (emboss width direction pitch, Rc + Rd, FIG. 4) of the width direction of an embossed part into the range of 1-5 mm. The basis weight of the front and rear portions between the front and rear or embossing of the bent portion of the absorbent body is preferably set to 50 to 200 g / m ^2. As embossing form, in addition to linear embossing, circular / triangular shaped compressed parts are continuous in the longitudinal direction and are substantially linear, or the compressed parts are long in the longitudinal direction and exhibit a linear behavior, etc. Is mentioned.
In addition, it is possible to increase the density by increasing the embossing depth / increasing the embossing shape / decreasing the embossing pitch. A medium density, a high density and the like can be formed in the lower layer back side layer.

このような構成になる矩形平板状吸収体１１の両側方部分１Ｃ，１Ｄを中央部分１Ａへ折り畳んで吸収体１を構成すると、図２（ｂ）の拡大図に示すような断面における積層形態となる。すなわち、下層部中間層１ｃの非エンボス部６の上側頂部６ｓは上層部１ａの裏面に接触し、また、下層部中間層１ｃの非エンボス部６の下側頂部６ｔは下層部裏面側層１ｄの上側頂部６ｓと接触する。そして、凹溝７の部分においては上述のとおり上層または下層どうしのいずれにおいても接触せず離間している。 When the absorbent body 1 is configured by folding the both side portions 1C and 1D of the rectangular plate-shaped absorbent body 11 having such a configuration into the central portion 1A, the laminated form in the cross section as shown in the enlarged view of FIG. Become. That is, the upper top portion 6s of the non-embossed portion 6 of the lower layer intermediate layer 1c is in contact with the back surface of the upper layer portion 1a, and the lower top portion 6t of the non-embossed portion 6 of the lower layer intermediate layer 1c is the lower layer back surface side layer 1d. In contact with the upper top 6s. And as above-mentioned in the part of the ditch | groove 7, it is spaced apart without contacting in any of the upper layer or the lower layer.

ここで、上層部１ａ表面の液は、上層部１ａの内部から下層部中間層１ｃの上側頂部６ｓを経て中密度の中間層１ｃの内部へ引き込まれ、さらに高密度の下層部裏面側層１ｄへと下層部中間層１ｃの下側頂部６ｔ及び下層部裏面側層１ｄの上側頂部６ｓを介して伝わって強く引き込まれる。このように吸収体１は上層部１ａから下層部１ｂへ向って密度勾配があるため、高密度の下層部１ｂに向うほど液の引込み力が強く働き、また、下層部１ｂの毛管現象により、下層部１ｂほど液の保持性が高く、その結果、上層部１ａの表面で液の滞留が少なくなり、上層部１ａ表面から周囲外方へ、特に横幅方向外側へ液が流出しにくくなる。また、上層部１ａでの吸収量が多い場合には、液は周囲に拡散して折り畳み部から下層へと引き込まれる。折り畳み部にはエンボス部があるため、長手方向に拡散させながら、下層へと液を移動させるため、吸収体の側部からの漏れが生じ難くなる。なお、本実施形態では側部にサイドシート４があるため、折り畳み縁部に保持された液の隠蔽および漏れ防止を行っている。そして、それと同時に、上記吸収体１の作用により上層部１ａから下層部１ｂへの液引込み力が向上することから、表面のドライ感が向上する。 Here, the liquid on the surface of the upper layer portion 1a is drawn from the inside of the upper layer portion 1a to the inside of the intermediate density intermediate layer 1c through the upper top portion 6s of the lower layer portion intermediate layer 1c, and further has a higher density lower layer portion back side layer 1d. It is strongly pulled in through the lower top 6t of the lower layer intermediate layer 1c and the upper top 6s of the lower back side layer 1d. Thus, since the absorber 1 has a density gradient from the upper layer portion 1a to the lower layer portion 1b, the liquid pulling force works stronger toward the high density lower layer portion 1b, and due to the capillary phenomenon of the lower layer portion 1b, The lower layer portion 1b has higher liquid retention. As a result, the liquid stays less on the surface of the upper layer portion 1a, and the liquid is less likely to flow out from the surface of the upper layer portion 1a to the outer periphery, particularly to the outside in the lateral width direction. Moreover, when there is much absorption amount in the upper layer part 1a, a liquid spread | diffuses to circumference | surroundings and is drawn in from a folding part to a lower layer. Since the folding part has an embossed part, the liquid is moved to the lower layer while diffusing in the longitudinal direction, so that leakage from the side part of the absorber is difficult to occur. In the present embodiment, since the side sheet 4 is provided on the side portion, the liquid held at the folding edge is concealed and leakage prevention is performed. At the same time, the action of the absorber 1 improves the liquid drawing force from the upper layer portion 1a to the lower layer portion 1b, thereby improving the dryness of the surface.

本実施形態１の生理用ナプキンは、内在する吸収体１の折り畳まれた幅方向両側の縁部１ｓにエンボス加工による圧縮領域があるため、この部分で湾曲させる成形時の加工性が高く、形態及びその品質安定性が高い。さらに、液引き込み力を発揮する下層部中間層１ｃと下層部裏面側層１ｄの上側になる肌面側には、中央部１ｔにおいてふんわりした繊維状態維持された上層部１ａが配置されたため、着用者の肌面の起伏にも柔軟に追従し装着感が向上する。 The sanitary napkin of the first embodiment has a compression region by embossing at the edge portions 1s on both sides of the folded absorbent body 1 in the width direction. And its quality stability is high. Furthermore, since the upper layer part 1a maintained softly in the center part 1t is disposed on the skin surface side which is the upper side of the lower layer intermediate layer 1c and the lower layer rear surface side layer 1d which exerts the liquid drawing force, Wearability is improved by flexibly following the undulations of the person's skin.

図６は本発明の別の好ましい実施形態（実施形態２）としての生理用ナプキンを図２（ｂ）と同様の部分について示した部分的な拡大断面図である。この実施形態２では、下層部中間層１ｃに形成される線状エンボス部５の形状及びエンボス列ピッチと、下層部裏面側層１ｄに形成される線状エンボス部５の形状及びエンボス列ピッチとが同じパターンで形成されている。したがって両層の非エンボス部６のピッチも同様に形成されている。そして、下層部中間層１ｃの線状エンボス部５にはエンボス列底部５ｕ及びエンボス列斜面部５ｖで画成されるエンボス列がなす凹溝７が形成され、下層部裏面側層１ｄにも同じ形状及びピッチのエンボス列底部５ｕ及びエンボス列斜面部５ｖで画成されるエンボス列凹溝７が形成されている。このような断面形状の下層部中間層１ｃの下面に下層部裏面側層１ｄが重ね合わされ両層が対面する部分で、下層部裏面側層１ｄの上側頂部６ｓと下層部中間層１ｃの凹溝７とが、同時に下層部中間層１ｃの下側頂部６ｔと下層部裏面側層１ｄの凹溝７とが互いに係合するようにして、その非エンボス部の上下の頂部がエンボス列底部５ｕ及びエンボス列斜面部５ｔと当接し、両層が隙間なく積層される。 FIG. 6 is a partially enlarged cross-sectional view showing a sanitary napkin as another preferred embodiment (Embodiment 2) of the present invention with respect to the same portion as FIG. 2 (b). In the second embodiment, the shape and emboss row pitch of the linear embossed portions 5 formed in the lower layer intermediate layer 1c, and the shape and emboss row pitch of the linear embossed portions 5 formed in the lower layer back side layer 1d Are formed in the same pattern. Therefore, the pitch of the non-embossed portions 6 of both layers is formed similarly. The linear embossed portion 5 of the lower layer intermediate layer 1c is formed with a groove 7 formed by the embossed row defined by the embossed row bottom portion 5u and the embossed row slope portion 5v, and the same is applied to the lower layer back side layer 1d. Embossed row grooves 7 defined by the embossed row bottom portion 5u and the embossed row slope portion 5v having the shape and pitch are formed. In the cross-sectional shape of the lower part intermediate layer 1c, the lower part back side layer 1d is overlapped with each other, and the upper part 6s of the lower part back side layer 1d and the concave part of the lower part intermediate layer 1c 7 and the lower top portion 6t of the lower layer intermediate layer 1c and the concave groove 7 of the lower layer back surface side layer 1d are engaged with each other so that the upper and lower top portions of the non-embossed portions are emboss row bottom portions 5u and It abuts on the embossed row slope portion 5t, and the both layers are laminated without a gap.

このように下層部中間層（右側下層部）１ｃと下層部裏面側層（左側下層部）１ｄのエンボスパターンを同一にすることにより、下層部中間層１ｃと下層部裏面側層１ｄの密度はほぼ同程度となるが、両層１ｃと１ｄとの重ね合わせにより、下層部中間層１ｃと下層部裏面側層１ｄとの接触面積が大となり、液の引込み力が安定する。また、下層部中間層１ｃと下層部裏面側層１ｄのエンボス部５と非エンボス部６の凹凸係合により、使用中の幅方向への「よれ」や「ずれ」が生じにくく、当初の形状が長く維持される。この実施形態２においても、疎密度の上層部１ａから高密度の下層部１ｂへと厚み方向に密度勾配が生じているので、上層部１ａ表面の液は下層部１ｂの毛管現象により下層部１ｂ側へと容易に引き込まれ、また、下層部１ｂでの液の保持性も確保される。なお、このような効果を発揮しやすくするために、下層部中間層側層１ｃの凹溝７（エンボス部５）と下層部裏面側層側層１ｄの凸部（非エンボス部６）の幅方向長さを変え、すなわち凹溝の間隔を長くするか、凸部の間隔を短くする等することが好ましい。 Thus, by making the embossing patterns of the lower layer intermediate layer (right lower layer portion) 1c and the lower layer lower surface side layer (left lower layer portion) 1d identical, the density of the lower layer intermediate layer 1c and lower layer rear surface side layer 1d is Although approximately the same level, the overlapping of the two layers 1c and 1d increases the contact area between the lower layer intermediate layer 1c and the lower layer back side layer 1d, and stabilizes the liquid drawing force. In addition, due to the uneven engagement of the embossed portion 5 and the non-embossed portion 6 of the lower layer intermediate layer 1c and the lower layer back side layer 1d, it is difficult to cause “twist” or “displacement” in the width direction during use, and the original shape Is maintained for a long time. Also in the second embodiment, the density gradient is generated in the thickness direction from the sparsely dense upper layer portion 1a to the dense lower layer portion 1b, so that the liquid on the surface of the upper layer portion 1a is caused by the capillary phenomenon of the lower layer portion 1b. It is easily pulled to the side, and the liquid retainability in the lower layer portion 1b is ensured. In order to easily exhibit such an effect, the width of the concave groove 7 (embossed portion 5) of the lower layer intermediate layer side layer 1c and the convex portion (non-embossed portion 6) of the lower layer back side layer side layer 1d. It is preferable to change the direction length, that is, to increase the interval between the concave grooves or to shorten the interval between the convex portions.

図７及び図８は、本発明のまた別の好ましい実施形態（実施形態３）として生理用ナプキンの線状エンボス部の形状を示した部分的な平面図、及び図７のＣ−Ｃ線に沿った拡大断面図であり、それぞれ図３及び図５に対応した図である。この実施形態３においても、エンボス部５は深さの浅い底部の低圧搾部５ｂと、これよりも深さの深い底部の高圧搾部５ａが交互に線状に並んだ線状エンボス部として構成され、かつ、実施形態１，２と同様に下層部の中間層表裏面及び下層部裏面側層の表裏面からそれぞれの折り畳み線ｆにかかるように形成されるが、実施形態３の場合は、図７に示すごとく、線状エンボス部５が長手方向に完全に連続せず、エンボス部５の長手方向の中途部位で非エンボス部６によって複数個に分断されている。 7 and 8 are a partial plan view showing the shape of a linear embossed portion of a sanitary napkin as still another preferred embodiment (Embodiment 3) of the present invention, and a CC line in FIG. FIG. 6 is an enlarged sectional view taken along the line and corresponding to FIGS. 3 and 5, respectively. Also in the third embodiment, the embossed portion 5 is configured as a linear embossed portion in which a low-pressure squeezed portion 5b having a shallow depth and a high-pressure squeezed portion 5a having a deeper depth are alternately arranged in a line. And, like the first and second embodiments, it is formed so as to cover each folding line f from the front and back surfaces of the lower layer intermediate layer front and back layers and the lower layer back surface side layer. As shown in FIG. 7, the linear embossed portion 5 is not completely continuous in the longitudinal direction, and is divided into a plurality of portions by the non-embossed portion 6 in the midway portion of the embossed portion 5 in the longitudinal direction.

このような不連続形態の線状エンボス部５とすることにより、線状エンボス部５の長さ方向に沿った液の流れは、途中の非エンボス部６によって遮断され、過剰拡散による液漏れがなくなり、下層部全面で適切な液拡散及び液保持がなされる。 By using the linear embossed portion 5 having such a discontinuous form, the liquid flow along the length direction of the linear embossed portion 5 is blocked by the non-embossed portion 6 in the middle, and liquid leakage due to excessive diffusion is prevented. Thus, appropriate liquid diffusion and liquid holding are performed on the entire lower surface portion.

次に、本発明の吸収性物品の製造方法について、好ましい実施形態を図９の製造工程を参照して説明する。この製造工程は大別して繊維シート供給ロール３６、解繊機３０と、パルプ積繊機３１と、エンボス加工を行うプレス機３２と、折り畳み装置３３と、カッター３４とを有し、繊維シートやパルプ繊維等素材の供給から製品取り出しまで一連の搬送ライン上で自動的かつ連続的に吸収性物品の製造がなされる。 Next, a preferred embodiment of the method for manufacturing an absorbent article of the present invention will be described with reference to the manufacturing process of FIG. This manufacturing process is roughly divided into a fiber sheet supply roll 36, a fiber opening machine 30, a pulp stacking machine 31, a press machine 32 that performs embossing, a folding device 33, and a cutter 34. Absorbent articles are manufactured automatically and continuously on a series of conveyance lines from supply of raw materials to product removal.

まず、解繊機３０は素材のパルプシートの供給を受けてパルプ繊維に解繊し、これを下流のパルプ積繊機３１へ空気搬送される。
一方、ライン上流側に設けられた繊維シート供給ロール３６から液透過性のある帯状の吸収紙等の繊維シート８がライン上へ繰り出されてパルプ積繊機３１へ供給され、この繊維シート８上にパルプ積繊機３１によってパルプ積繊層が形成され、帯状に連続したパルプ積繊体と繊維シートから成る連続平板状吸収体１１０となる。３８は搬送ラインの下面に設置された吸引ダクトである。 First, the defibrator 30 is supplied with a raw material pulp sheet, defibrated into pulp fibers, and is conveyed to the downstream pulp stacker 31 by air.
On the other hand, a fiber sheet 8 such as a belt-like absorbent paper having liquid permeability is fed out from the fiber sheet supply roll 36 provided on the upstream side of the line and supplied to the pulp stacking machine 31. A pulp stacking fiber layer is formed by the pulp stacking machine 31 to form a continuous plate-shaped absorbent body 110 composed of a pulp stacking fiber body and a fiber sheet that are continuous in a band shape. Reference numeral 38 denotes a suction duct installed on the lower surface of the transport line.

次に、このパルプ積繊体および繊維シートからなる連続平板状吸収体１１０はプレス機３２に送られ、上下プレスロール、この場合は上側のフラットロール３２ａ及び下側のエンボスロール３２ｂによって連続平板状吸収体１１０の両側部に図３あるいは図７で説明したような線状エンボス部が形成される。詳細には、積繊されたパルプ層側がフラットロール３２ａで、繊維シート側にエンボスロール３２ｂを用いる。このようにエンボス加工された平板状の吸収体は、後続の折り畳み装置３３の折り目付けローラ３３ａ及び折り畳み用プレート３３ｂによって連続平板状吸収体１１０の側部が、エンボス加工した領域の部分を折り目として、この例では上側へ折り返されて連続平板状吸収体１１０の中央部の上面に重なるように折り畳まれる。この状態で帯状に連続した吸収体が形成され、その下面側が図１で説明した上層部となり、上面側がエンボス部を有する下層部となる。その後、カッター３４で所定の長さ寸法に切断されて吸収体１となり、その両側部にサイドシート４（図１）が接着され、さらに表面シートロール４１で吸収体１に表面シート２が接着され、かつ裏面シートロール４２で裏面シート３が接着され、両シート２，３間が吸収体を介して接合されて本発明に係る吸収性物品１０が得られる。 Next, the continuous plate-like absorbent body 110 made of this pulp pile fiber and fiber sheet is sent to a press machine 32, and is formed into a continuous plate shape by upper and lower press rolls, in this case, an upper flat roll 32a and a lower embossing roll 32b. Linear embossed portions as described in FIG. 3 or FIG. 7 are formed on both sides of the absorber 110. Specifically, the side of the laminated pulp layer is a flat roll 32a, and the embossing roll 32b is used on the fiber sheet side. The embossed flat plate-shaped absorber is formed by using a portion of the embossed side of the continuous flat plate-shaped absorber 110 by the folding roller 33a and the folding plate 33b of the subsequent folding device 33 as a fold. In this example, the sheet is folded upward so as to overlap the upper surface of the central portion of the continuous plate-like absorber 110. In this state, a continuous absorber in a band shape is formed, and the lower surface side becomes the upper layer portion described in FIG. 1, and the upper surface side becomes the lower layer portion having the embossed portion. Then, it cut | disconnects by predetermined length dimension with the cutter 34, and becomes the absorber 1, the side sheet | seat 4 (FIG. 1) is adhere | attached on the both sides, and also the surface sheet 2 is adhere | attached on the absorber 1 with the surface sheet roll 41. And the back surface sheet 3 is adhere | attached with the back surface sheet roll 42, and both sheets 2 and 3 are joined via an absorber, and the absorbent article 10 which concerns on this invention is obtained.

なお、上述と一部重複するが、平板状吸収体の折り畳み工程についてさらに詳しく説明すれば、前段のプレス機３２でエンボス加工された平板状吸収体が折り畳み装置前段の搬送ベルト機構５０によって一対の折り目付けローラ３３ａに送り込まれる。折り目付けローラ３３ａは図３で示した矩形平板状吸収体１１の折り畳み線ｅ，ｆの位置に相当する間隔で軸支されており、安定に折り畳み賦形することができる。そして、図示しない駆動装置によって回転駆動されて折り目付けローラ３３ａの周縁で平板状吸収体に折り目を形成する。折り目付けローラ３３ａの後段側には、底板の両側部が上側へ折り曲げられた折り畳み用プレート３３ｂへと送られる。平板状吸収体の両側部は、このプレート３３ｂの側板から上板に拘束されつつ送られ、この送り動作と共働して折り目の部分で両側部が平板状吸収体の中央部に重なるように折り畳まれて次工程へと送り出される。 In addition, although partially overlapping with the above, if the folding process of the flat absorbent body is described in more detail, the flat absorbent body embossed by the preceding press machine 32 is paired by the transport belt mechanism 50 in the front stage of the folding apparatus. It is sent to the creasing roller 33a. The creasing roller 33a is pivotally supported at intervals corresponding to the positions of the folding lines e and f of the rectangular plate-shaped absorbent body 11 shown in FIG. 3, and can be folded and shaped stably. And it is rotationally driven by the drive device which is not shown in figure, and forms a crease | fold in a flat absorbent body in the periphery of the crease forming roller 33a. On the rear stage side of the creasing roller 33a, the sheet is sent to a folding plate 33b in which both side portions of the bottom plate are bent upward. Both side portions of the plate-like absorber are fed while being restrained from the side plate of the plate 33b to the upper plate, and cooperate with this feeding operation so that both sides overlap the central portion of the plate-like absorber at the fold portion. It is folded and sent to the next process.

上記実施態様の製造方法によれば、圧縮加工された領域内で平板状吸収体を折り畳むため、吸収性物品の構成材料を連続搬送ライン上で安定かつ効率的に製造することができ、特に高速生産中の製造安定性を高めることができる。 According to the manufacturing method of the above embodiment, since the flat absorbent body is folded in the compressed region, the constituent material of the absorbent article can be manufactured stably and efficiently on the continuous conveyance line, and particularly at high speed. Manufacturing stability during production can be increased.

本発明の吸収性物品において表面シートは、液透過性であり肌への当りのソフトな材料からなることが好ましい。例えばコットン等の天然繊維を材料とする不織布や、各種合成繊維に親水化処理を施したものを材料とする不織布や開孔されたフィルム等を用いることができる。裏面シートは液不透過性のシート材からなることが好ましい。裏面シートは必要に応じて水蒸気の透過性のものであってもよい。具体的に十分な水蒸気透過性を得るために、炭酸カルシウム等のフィラーからなる微粉を分散させたポリエチレン等の合成樹脂製のフィルムを延伸し、微細な孔をあけた多孔質フィルムを用いることが好ましい。サイドシートとしては、不織布、フィルムシート、紙等が挙げられる。防漏性の観点からは、サイドシートを液不透過性又は難透過性である疎水性不織布、防漏性のフィルムシート等により形成することが好ましい。上記シートは一枚でもよいし、さらに機能性のシート等と組み合わせて２枚以上のものとしてもよい。吸収体の形成材料としては、上述の実施形態ではパルプ積繊体と、このパルプ積繊体を囲包する繊維シートで構成されたが、通常吸収性物品に用いられるものを用いることができる。具体的には例えば、繊維集合体又はこれと高分子吸水ポリマーとを併用させたもの等を用いることができる。繊維集合体を構成する繊維としては、パルプ繊維等の親水性天然繊維や、合成繊維（好ましくは親水化処理を施したもの）等を用いることができる。 In the absorbent article of the present invention, the top sheet is preferably made of a material that is liquid-permeable and soft against the skin. For example, a nonwoven fabric made of natural fibers such as cotton, a nonwoven fabric made by subjecting various synthetic fibers to a hydrophilic treatment, a perforated film, or the like can be used. The back sheet is preferably made of a liquid-impermeable sheet material. The back sheet may be water vapor permeable as required. Specifically, in order to obtain sufficient water vapor permeability, a film made of synthetic resin such as polyethylene in which fine powder made of a filler such as calcium carbonate is dispersed is stretched and a porous film having fine holes is used. preferable. Examples of the side sheet include a nonwoven fabric, a film sheet, and paper. From the viewpoint of leakage prevention, it is preferable that the side sheet is formed of a liquid non-permeable or hardly permeable hydrophobic nonwoven fabric, a leak-proof film sheet, or the like. One sheet may be used, or two or more sheets may be combined with a functional sheet. As a material for forming the absorbent body, in the above-described embodiment, the absorbent body is composed of a pulp product and a fiber sheet surrounding the pulp product, but materials normally used for absorbent articles can be used. Specifically, for example, a fiber aggregate or a combination of this and a polymer water-absorbing polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used.

上記各実施形態においては、本発明の吸収性物品について生理用ナプキンを例に詳しく説明したが、本発明はこれに限定されず、様々な吸収性物品において効果を奏するものである。本発明の吸収性物品として例えば、生理用ナプキンのほか、失禁用パット、おむつ、ペット用シーツなどが好ましい実施形態として挙げられる。 In each said embodiment, although the sanitary napkin was demonstrated in detail about the absorbent article of this invention as an example, this invention is not limited to this, There exists an effect in various absorbent articles. As an absorbent article of the present invention, for example, in addition to sanitary napkins, incontinence pads, diapers, pet sheets and the like can be mentioned as preferred embodiments.

上記吸収体に施されるエンボスの大きさは特に限定されないが、点エンボスであれば１点の面積が１〜５３０ｍｍ^２であることが好ましく、線状エンボスであれば線幅が１〜３５ｍｍであることが好ましい。線状エンボスにおいて、１つの線内に高圧縮部と低圧縮部とを設けてもよく、それぞれの長さは特に限定されないが、例えば０．５〜５１〜１０ｍｍであることが好ましい。 The size of the embossing to be applied to the absorbent body is not particularly limited, it is preferable that the area of one point if the point embossing is 1～530Mm ^2, the line width if the linear embossing in 1~35mm Preferably there is. In the linear embossing, a high compression portion and a low compression portion may be provided in one line, and the length of each is not particularly limited, but is preferably 0.5 to 51 to 10 mm, for example.

上述の実施形態では、下層部が右側から折り畳まれた中間層と左側から折り畳まれた裏面側層を有し、上層部を含めて３層構造としたが、左右の下層部の折り畳み部分を互いに重ね合せの状態にすることなく、あるいは吸収体の左右いずれか片側のみを折り畳んで、下層部を１層とし全体として上層部と下層部との２層構造としてもよい。また、３層構造とする場合も、下層部中間層と下層部裏面側層とのどちらかに圧縮領域を形成してもよく、上層部に圧縮領域を形成してもよい。 In the above-described embodiment, the lower layer portion has the intermediate layer folded from the right side and the back side layer folded from the left side, and has a three-layer structure including the upper layer portion, but the folded portions of the left and right lower layer portions are mutually connected. It is also possible to fold only one of the left and right sides of the absorber without overlapping and to form a two-layer structure of the upper layer portion and the lower layer portion as a whole with the lower layer portion as one layer. Also in the case of a three-layer structure, the compression region may be formed in either the lower layer intermediate layer or the lower layer back side layer, or the compression region may be formed in the upper layer portion.

以下に本発明を実施例に基づきさらに詳細に説明するが、本発明はこれらにより限定して解釈されるものではない。 The present invention will be described below in more detail based on examples, but the present invention is not construed as being limited thereto.

（実施例１：試験体１）
本発明によって得られた生理用ナプキンの具体的な仕様及びその液吸収性の試験結果を従来品と比較して記載する。
まず、図９に示した製造工程によって図１及び図２に示した生理用ナプキン（試験体１）を製造した。このとき、表面シートとしてポリエチレンとポリエステルによる芯鞘構造の２．２ｄｔｅｘ繊維をカード法によるウエブ化した後、エアスルー法により不織布化した不織布を用い、裏面シートとしてポリエチレン製のフィルムを用いた。パルプ積繊体を包む繊維シートは１６ｇ／ｍ^２の吸収紙を使用し、解繊機に仕込むパルプ繊維としては、ウエハウザーより入手したＮＢ４１６Ｌを用いた。製造した生理用ナプキンの寸法は、長手方向（Ｙ方向）が約２０５ｍｍ、幅方向（Ｘ方向）が７０ｍｍであった。表面シートの坪量は２５ｇ／ｍ^２であり、裏面シートの坪量は２０ｇ／ｍ^２であった。 (Example 1: Specimen 1)
The specific specifications of the sanitary napkin obtained by the present invention and the test results of its liquid absorbency will be described in comparison with the conventional products.
First, the sanitary napkin (test body 1) shown in FIGS. 1 and 2 was manufactured by the manufacturing process shown in FIG. At this time, a 2.2 dtex fiber having a core / sheath structure of polyethylene and polyester as a top sheet was made into a web by the card method, and then a non-woven fabric made into a non-woven fabric by the air-through method was used. A polyethylene film was used as the back sheet. Fiber sheet wrapping pulp stacks uses absorbent paper of 16g / m ^2, as the pulp fibers to be charged to the fiberizer, using NB416L, obtained from Uehauza. The dimensions of the manufactured sanitary napkin were about 205 mm in the longitudinal direction (Y direction) and 70 mm in the width direction (X direction). The basis weight of the top sheet was 25 g / m ² , and the basis weight of the back sheet was 20 g / m ² .

吸収体は図１及び図２に示したように長手方向に沿って３つ折りにされ、上層部、下層部中間層、下層部裏面側層から構成されている。折り畳まれた吸収体は長さ（Ｙ方向）１７５ｍｍであり、幅（Ｘ方向）６８ｍｍであった。また、吸収体全体の厚さは５．０ｍｍであり、上層部の厚さは約２．５ｍｍであり、下層部中間層の厚さは約１．５ｍｍであり、下層部裏面側層の厚さは約１ｍｍであった。上層部の坪量は８０ｇ／ｍ^２であり、下層部中間層、下層部裏面側層の坪量はそれぞれ８０ｇ／ｍ^２であり、吸収体全体の坪量は２４０ｇ／ｍ^２であった。下層部を構成する下層部中間層と下層部裏面側層とは、上層部の幅方向中央部１Ａの全域にわたって積層されていた。 The absorber is folded in three along the longitudinal direction as shown in FIGS. 1 and 2, and is composed of an upper layer portion, a lower layer intermediate layer, and a lower layer back side layer. The folded absorbent body was 175 mm in length (Y direction) and 68 mm in width (X direction). The thickness of the entire absorber is 5.0 mm, the thickness of the upper layer is about 2.5 mm, the thickness of the lower layer intermediate layer is about 1.5 mm, and the thickness of the lower layer back side layer The thickness was about 1 mm. The basis weight of the upper layer portion was 80 g / m ² , the basis weights of the lower layer intermediate layer and the lower layer back side layer were 80 g / m ² , respectively, and the basis weight of the entire absorbent body was 240 g / m ² . The lower layer intermediate layer and the lower layer back side layer constituting the lower layer were laminated over the entire width direction central portion 1A of the upper layer.

矩形平板状吸収体１１には、図３に示したように、吸収体１の折り畳み縁部１ｓに対応する折り畳み線ｅ近傍の部分から下層部中間層（右側下層部）１ｃ側にかけて８本の線状エンボスが施され、折り畳み線ｆ近傍の部分から下層部裏面側層（左側下層部）１ｄ側にかけては１０本の線状エンボスが施されていた。１本の線状エンボスの長さＲｅ（図３参照）は約１２０ｍｍであり、幅Ｒｃ（図４参照）は約２ｍｍであり、高圧搾部の長さＲｂ（図３参照）は約１ｍｍであった。低圧搾部の長さＲａ（図３参照）は約１．５ｍｍであった。非エンボス部の幅Ｒｄ（図４参照）は下層部中間層と下層部裏面側層とで異なり、下層部中間層の幅Ｒｄが約５ｍｍであり、下層部裏面側層の幅Ｒｄが約２ｍｍであった。このときの下層部中間層のエンボス率は約３５％であり、下層部裏面側層のエンボス率は約５５％であった。 As shown in FIG. 3, the rectangular plate-shaped absorber 11 includes eight pieces from the vicinity of the folding line e corresponding to the folding edge 1 s of the absorber 1 to the lower layer intermediate layer (right lower layer) 1 c side. Linear embossing was applied, and 10 linear embossings were applied from the portion near the folding line f to the lower layer back side layer (left lower layer) 1d side. The length Re (see FIG. 3) of one linear emboss is about 120 mm, the width Rc (see FIG. 4) is about 2 mm, and the length Rb (see FIG. 3) of the high pressure portion is about 1 mm. there were. The length Ra (see FIG. 3) of the low-pressure portion was about 1.5 mm. The width Rd (see FIG. 4) of the non-embossed portion is different between the lower layer intermediate layer and the lower layer back side layer, the lower layer intermediate layer width Rd is about 5 mm, and the lower layer back side layer width Rd is about 2 mm. Met. The embossing rate of the lower layer intermediate layer at this time was about 35%, and the embossing rate of the lower layer back side layer was about 55%.

吸収体は、次のように作成した。図３のように、繊維シート上にパルプ繊維を堆積させてパルプ積繊体を形成し、プレス機によって、線状エンボス部を形成した。プレス機では、積繊されたパルプ積繊体側がフラットロールで、繊維シート側にエンボスロールを用いた。エンボス加工した後、折り目付けローラ及び折り畳み用プレート３３ｂによって、繊維シートおよびパルプ積繊体についてその両側部を折り返し、側部が中央部の上面に重なるように折り畳んで、吸収体を作成した。 The absorber was prepared as follows. As shown in FIG. 3, pulp fibers were deposited on a fiber sheet to form a pulp pile, and a linear embossed portion was formed by a press. In the press machine, the side of the piled fiber body on which the fibers were stacked was a flat roll, and an embossing roll was used on the fiber sheet side. After embossing, the both sides of the fiber sheet and the pulp pile were folded by the crease roller and folding plate 33b, and the side parts were folded so as to overlap the upper surface of the central part, thereby creating an absorbent body.

［吸収体厚み測定方法］
製造した生理用ナプキンより吸収体を取り出し、上層部と下層部中間層と下層部裏面側層が重なり合っている部分に、３ｃｍ×３ｃｍのプレートを載せ、２．５ｇ／ｃｍ^２荷重下でピーコック製卓上厚みゲージによって厚みを測定した。
次に、折り畳まれている吸収体を開き、上層部、下層部中間層、下層部裏面側層それぞれの厚みを、同様に３ｃｍ×３ｃｍのプレートを載せ、２．５ｇ／ｃｍ^２荷重下でピーコック製卓上厚みゲージによって測定した。なお、上層部、下層部中間層、下層部裏面側層は、１層の吸収紙とパルプ積繊体で構成されている。
［エンボス幅測定方法］
製造した生理用ナプキンより吸収体を取り出し、線状エンボスについて、定規でその幅を測定した。各線状エンボスは、生理用ナプキンの長手方向（Ｙ方向）に前方、中央、後方の３箇所の幅を測定し平均した値をエンボス幅として表す。 [Absorber thickness measurement method]
The absorbent body is taken out from the manufactured sanitary napkin, and a 3 cm × 3 cm plate is placed on the portion where the upper layer portion, the lower layer intermediate layer, and the lower layer back side layer overlap, and made by Peacock under a load of 2.5 g / cm ² . The thickness was measured with a desktop thickness gauge.
Next, the folded absorbent body is opened, and the thickness of each of the upper layer portion, the lower layer intermediate layer, and the lower layer back side layer is similarly placed on a 3 cm × 3 cm plate, and a peacock under a load of 2.5 g / cm ^2. It was measured with a tabletop thickness gauge. In addition, the upper layer part, the lower layer part intermediate | middle layer, and the lower layer part back surface side layer are comprised by the 1 layer of absorbent paper and the pulp fiber.
[Emboss width measurement method]
The absorbent body was taken out from the manufactured sanitary napkin, and the width of the linear emboss was measured with a ruler. Each linear embossing represents the value obtained by measuring and averaging the widths of the front, center and rear in the longitudinal direction (Y direction) of the sanitary napkin as the emboss width.

（比較例１：試験体ｃ１）
上記試験体１に対して、吸収体は長さ１８０ｍｍ、幅７０ｍｍ、厚さ５．８ｍｍ、坪量２４０ｇ／ｍ^２の単層のものを用い、また、吸収体を折り畳まず、線状エンボスを設けなかった以外、同様にして生理用ナプキン（試験体ｃ１）を製造した。 (Comparative Example 1: Specimen c1)
For the test body 1, a single-layer absorber having a length of 180 mm, a width of 70 mm, a thickness of 5.8 mm, and a basis weight of 240 g / m ² was used, and the linear embossing was not performed without folding the absorber. A sanitary napkin (test body c1) was produced in the same manner except that it was not provided.

（比較例２：試験体ｃ２）
比較例１の吸収体に、１つの点の大きさ（面積）が１ｍｍ^２である点エンボスを吸収体の全面にほぼ均等間隔（ひし形パターン状に縦横各々１０ｍｍ間隔）で設けた以外、比較例１と同様にして生理用ナプキン（試験体ｃ２）を製造した。吸収体の厚さは４．９ｍｍであった。 (Comparative Example 2: Specimen c2)
Comparative Example 1 except that point embossment having a size (area) of one point of 1 mm ² was provided on the entire surface of the absorbent body at a substantially equal interval (10 mm vertical and horizontal intervals in a rhombus pattern). In the same manner as in Example 1, a sanitary napkin (test body c2) was produced. The thickness of the absorber was 4.9 mm.

（比較例３：試験体ｃ３）
比較例１の吸収体に、エンボスの幅Ｒｃ２ｍｍ、エンボスの間隔Ｒｄ５ｍｍの線状エンボスを長手方向中央部に長さ１５０ｍｍで間欠配置した。吸収体の厚さは２．８ｍｍであった。それ以外は、比較例１と同様にして生理用ナプキン（試験体ｃ３）を製造した。 (Comparative Example 3: Specimen c3)
In the absorbent body of Comparative Example 1, linear embosses having an emboss width Rc of 2 mm and an emboss interval Rd of 5 mm were intermittently arranged at a central portion in the longitudinal direction with a length of 150 mm. The thickness of the absorber was 2.8 mm. Other than that was carried out similarly to the comparative example 1, and manufactured the sanitary napkin (test body c3).

作製した生理用ナプキン（各試験体）の表面シート側のほぼ中央に馬血３ｇを滴下し、約１分後に、「表面液残り量」及び「表面側漏れ拡がり面積」を測定した。結果を下表１に示した。
［表面液残り量の測定・算出手段］
上記馬血を滴下して約１分後の試験体を解体し、馬血を滴下した部分を含む表面シートを切り出し、その質量（Ｗｆ）を測定した。一方、馬血を滴下しない同面積の表面シートの質量（Ｗｉ）を予め測定しておき、滴下前後の質量の差（Ｗｆ−Ｗｉ）を求め、これを液残り量とした。この液残り量が少ないほど良く、この値が２５ｍｍｇ以下であれば、実用上高いレベルで満足を得ることができる。
［表面側液拡がり面積の測定・算出手段］
上記馬血を滴下して約１分後の試験体を表面シート側から画像解析機（ＮＥＸＵＳ社製、画像解析ソフトＮＥＷＱＵＢＥ（ｖｅｒ.４．２０）（商品名））光源（サンライトＳＬ−２３０Ｋ２；ｍｍ／Ｆ２．８Ｄニッコールレンズ）、ＣＣＤカメラ［（ＨＶ−３７；日立電子（株）社製）Ｆマウントによるレンズとの接続］及びビデオボード［スペクトラ３２００；カノプース（株）社製］を用いて撮影し、この撮影画像から馬血により染色されている部分の面積を二値化処理により算出した。この漏れ液拡がり面積が小さいほど良く、この値が１１ｍｍ^２以下であれば、実用上高いレベルで満足を得ることができる。 3 g of equine blood was dropped approximately at the center of the prepared sanitary napkin (each test specimen) on the surface sheet side, and after about 1 minute, “surface liquid remaining amount” and “surface side leakage spread area” were measured. The results are shown in Table 1 below.
[Measurement and calculation of remaining amount of surface liquid]
The test body about 1 minute after dropping the horse blood was disassembled, and a surface sheet including a portion where the horse blood was dropped was cut out and the mass (Wf) was measured. On the other hand, the mass (Wi) of the surface sheet of the same area where horse blood is not dripped is measured in advance, the mass difference (Wf-Wi) before and after the drip is determined, and this is defined as the remaining liquid amount. The smaller the remaining amount of liquid, the better. If this value is 25 mmg or less, satisfaction can be obtained at a practically high level.
[Measuring / Calculating Means for Surface-side Liquid Spread Area]
About 1 minute after dropping the horse blood, the test specimen was image-analyzed (manufactured by nexus, image analysis software NEW QUABE (ver. 4.20) (trade name)) light source (Sunlight SL- 230K2; mm / F2.8D Nikkor lens), CCD camera [(HV-37; manufactured by Hitachi Electronics Co., Ltd.) F lens mount] and video board [Spectra 3200; manufactured by Canopus Co., Ltd.] The area of the portion stained with horse blood was calculated from the photographed image by binarization processing. The smaller the leakage liquid spreading area, the better. If this value is 11 mm ² or less, satisfaction can be obtained at a practically high level.

［表１］
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
試験体吸収体厚さ表面シート液残り量表面側液拡がり面積
（ｍｍ）（ｍｇ）（ｍｍ^２）
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
実施例１５．０２５１１
比較例１ｃ１５．８７５１０
比較例２ｃ２４．９６０１０
比較例３ｃ３２．８２５１３
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− [Table 1]
--------------------------------------
Specimen Absorber thickness Surface sheet liquid remaining area Surface side liquid spreading area
(Mm) (mg) (mm ² )
--------------------------------------
Example 1 5.0 25 11
Comparative Example 1 c1 5.8 75 10
Comparative Example 2 c2 4.9 60 10
Comparative Example 3 c3 2.8 25 13
--------------------------------------

作製した生理用ナプキン（各試験体）の装着感について、試験者による手触りによる感触の官能評価を下記項目と内容にて実施し、結果を下表２に示した。
評価項目：幅方向からのクッション感、厚み方向のクッション感
評価内容：試験者５人にて評価した。評価は３段階で、比較例１を基準に、良い２点、同等１点、悪い０点として、合計点数が７〜１０点を○、３〜６点を△、０〜２点を×とした（評価者の２０％に相当する向上結果について上位評価）。 Regarding the feeling of wearing of the prepared sanitary napkin (each test specimen), sensory evaluation of touch feeling by the tester was performed according to the following items and contents, and the results are shown in Table 2 below.
Evaluation items: Cushion feeling from the width direction, cushion feeling in the thickness direction Evaluation content: Evaluated by five testers. The evaluation is made in three stages, based on Comparative Example 1, with 2 points being equivalent, 1 equivalent point, 0 points being bad, the total score is 7 to 10 points, 3 to 6 points is Δ, 0 to 2 points is × (Upper evaluation of improvement results corresponding to 20% of evaluators).

［表２］
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
試験体＜クッション感＞
幅方向厚み方向
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
実施例１ ○ ○
比較例１ｃ１ − ―
比較例２ｃ２ △ ×
比較例３ｃ３ △ ×
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− [Table 2]
-----------------------------
Specimen <Cushion>
Width direction Thickness direction -----------------------------
Example 1 ○ ○
Comparative Example 1 c1 − −
Comparative Example 2 c2 Δ ×
Comparative Example 3 c3 Δ ×
-----------------------------

上記表１の結果から分かる通り、比較例１の生理用ナプキン（試験体ｃ１）は表面シートの液残り量が極めて多く、実用上の要求を十分に満足し得るものではなかった。その試験体ｃ１に単にエンボスを付した吸収体を有する比較例２及び３の生理用ナプキン（試験体ｃ２，ｃ３）によれば、エンボス率が高くなるにつれ、表面液残り量は改善される。しかし他方、吸収体の厚さがなくなり、装着感が悪化し、表面側の液拡がり面積も大きくなってしまった。
これに対し、本発明の実施例１の生理用ナプキン（試験体１）は、表面シートの液残り量が大幅に抑えられ、表面側の液の拡がりもほとんど見られなかった。しかも、吸収体の嵩高さ（厚さ）が維持され、柔軟で且つクッション感の良好な装着感を実現できた。以上の結果より、本発明による吸収性物品における実用上の要求を高いレベルで満足し得ることが分かる。 As can be seen from the results in Table 1 above, the sanitary napkin (test body c1) of Comparative Example 1 had an extremely large amount of liquid remaining on the top sheet, and could not sufficiently satisfy practical requirements. According to the sanitary napkins of Comparative Examples 2 and 3 (test bodies c2 and c3) having an absorbent body simply embossed on the test body c1, the remaining amount of the surface liquid is improved as the embossing rate is increased. On the other hand, however, the thickness of the absorber is lost, the feeling of wearing is deteriorated, and the liquid spreading area on the surface side is also increased.
On the other hand, in the sanitary napkin (test body 1) of Example 1 of the present invention, the remaining amount of the liquid on the top sheet was greatly suppressed, and the spread of the liquid on the surface side was hardly seen. In addition, the bulkiness (thickness) of the absorbent body is maintained, and it is possible to realize a feeling of wearing that is flexible and has a good cushion feeling. From the above results, it can be seen that the practical requirements for the absorbent article according to the present invention can be satisfied at a high level.

以上説明したように本発明の実施形態によれば、矩形状のパルプ積繊の長手方向側部にエンボス加工を施した上で、前記側部を中央部の裏側へ折り畳む構成としたので、中央の上層部から下層部へかけて密度勾配が生じ、上層部から下層部への液引込み力が向上し、また吸収体表面での液拡散が抑制され、吸収体表面のドライ感が向上する。 As described above, according to the embodiment of the present invention, the embossing is performed on the longitudinal side portion of the rectangular pulp fiber, and the side portion is folded to the back side of the central portion. A density gradient is generated from the upper layer portion to the lower layer portion, the liquid drawing force from the upper layer portion to the lower layer portion is improved, liquid diffusion on the absorber surface is suppressed, and the dry feeling of the absorber surface is improved.

また、側部の折り畳みはエンボス加工した部分を含んで折り曲げるので、折り畳み加工が容易となり、正確で安定した折り畳み形状が得られる。さらに好ましくは、下層部の折り畳み部はエンボス部どうしの係合となるため、吸収体のよれが生じにくく、しかも吸収体の柔軟性やクッション感が向上するため、装着時の違和感がなく、吸収体の液吸収性とフィット感や安心感を与える吸収体厚みのバランスを確保できる。 Further, since the side part is folded including the embossed part, the folding process is facilitated, and an accurate and stable folded shape is obtained. More preferably, since the folded portion of the lower layer portion is engaged with the embossed portions, the absorber is less likely to be twisted, and the flexibility and cushion feeling of the absorber are improved. A balance between the body's fluid absorbency and the thickness of the absorber that provides a feeling of fit and security can be secured.

本発明の吸収性物品として好ましい実施形態（実施形態１）である生理用ナプキンの一部分裁断した斜視図である。1 is a partially cut perspective view of a sanitary napkin which is a preferred embodiment (Embodiment 1) as an absorbent article of the present invention. 図１のＩＩ−ＩＩ線に沿った拡大断面図（ａ）及びそのＡ部拡大断面図（ｂ）である。It is the expanded sectional view (a) and the A section expanded sectional view (b) along the II-II line of FIG. 図１における吸収性物品の吸収体となる吸収体素材の平面図である。It is a top view of the absorber raw material used as the absorber of the absorbent article in FIG. 図３のＡ−Ａ線拡大断面図である。It is an AA line expanded sectional view of FIG. 図３のＢ−Ｂ線拡大断面図である。FIG. 4 is an enlarged sectional view taken along line B-B in FIG. 3. 本発明の別の好ましい実施形態（実施形態２）としての生理用ナプキンの吸収体の図２（ｂ）と同様部分における拡大断面図である。It is an expanded sectional view in the same part as Drawing 2 (b) of an absorber of a sanitary napkin as another preferred embodiment (embodiment 2) of the present invention. 本発明のまた別の好ましい実施形態（実施形態３）としての生理用ナプキンにおける吸収体素材の部分的な平面図である。図である。It is a partial top view of the absorber raw material in the sanitary napkin as another preferable embodiment (Embodiment 3) of this invention. FIG. 図７のＣ−Ｃ線拡大断面図である。図である。FIG. 8 is an enlarged cross-sectional view taken along line CC in FIG. 7. FIG. 本発明の吸収性物品を製造する製造工程ラインを示す概略的な側面図である。It is a schematic side view which shows the manufacturing process line which manufactures the absorbent article of this invention.

Explanation of symbols

１吸収体
１ａ上層部
１ｂ下層部
１ｃ下層部中間層
１ｄ下層部裏面側層
２表面シート
３裏面シート
４サイドシート
５線状エンボス部
５ａ高圧搾部
５ｂ低圧搾部
６非エンボス部
７凹溝
９空洞部
１０生理用ナプキン DESCRIPTION OF SYMBOLS 1 Absorber 1a Upper layer part 1b Lower layer part 1c Lower layer part intermediate | middle layer 1d Lower layer part back side layer 2 Top sheet 3 Back sheet 4 Side sheet 5 Linear embossed part 5a High pressing part 5b Low pressing part 6 Non-embossing part 7 Groove 9 Cavity 10 Sanitary Napkin

Claims

An absorbent article having a top sheet, a back sheet, and an absorbent body disposed between the two sheets,
The absorber has a multilayer structure of an upper layer portion and a lower layer portion that are laminated by folding both sides of the absorber along the longitudinal direction of the absorber, and folding edges on both sides in the width direction of the folded absorber The absorbent article has a compressed region in which the density is higher than that of the central portion in the width direction of the upper layer portion.

2. The absorbent article according to claim 1, wherein the compression region is provided with an embossed portion for improving liquid diffusibility in the longitudinal direction of the absorbent body and is densified and densified.

The absorbent article according to claim 1 or 2, wherein the compressed region is densified and densified by a plurality of linear embossed portions extending along the longitudinal direction of the absorbent body.

The absorbent article according to any one of claims 1 to 3, wherein the left and right lower layer parts folded from both sides in the width direction of the absorbent body do not overlap each other.

A recessed groove is formed in the densified compressed region of the absorber lower layer part, and the upper layer part and the lower layer part of the absorber are separated in the cross-sectional direction at the groove part of the lower layer part. The absorbent article according to any one of claims 1 to 4.

The left and right lower layer portions folded from both sides in the width direction of the absorber are overlapped with each other, whereby the left and right lower layer portions of the absorber form a lower layer intermediate layer and a lower layer back side layer. The absorbent article according to any one of claims 1 to 3.

Concave grooves are formed in the densified compressed regions of the lower layer intermediate layer and the lower layer back side layer, and the upper layer portion and the lower layer intermediate layer of the absorber are formed on the lower layer intermediate layer. The lower layer intermediate layer and the lower layer back side layer are stacked so as to be spaced apart in the cross-sectional direction at the concave groove portions of both layers. 6. The absorbent article according to 6.

The absorbent article according to claim 5 or 6, wherein the lower layer intermediate layer and the lower layer back side layer are laminated so as not to be separated from each other in the cross-sectional direction in the densified compressed region.

A method for manufacturing an absorbent article having a top sheet, a back sheet, and an absorbent body disposed between the two sheets,
In forming the absorbent body, fluff pulp is stacked on a fiber sheet to form a stacked body, and after compressing by densification along the side region of the stacked body, A portion in the compressed region is folded as a fold line to one side of the stacked fiber body, and the fold line and the folding edge in the vicinity thereof and the fold portion extending outward of the stacked fiber body are compressed. Of manufacturing an absorbent article having an absorbent body having a region.

The compressive processing is performed on the side regions on both sides of the stacked fiber body, and the both side regions of the stacked fiber body are arranged on one side so that the left and right folded portions folded at the portions in the compressed region overlap each other. The manufacturing method of the absorbent article of Claim 9 which folds to the side and forms the said absorber.