JP6753664B2

JP6753664B2 - Non-woven

Info

Publication number: JP6753664B2
Application number: JP2015230182A
Authority: JP
Inventors: 飛生馬伊藤
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2020-09-09
Anticipated expiration: 2035-11-26
Also published as: JP2017093867A

Description

本発明は、片面に凹凸を有する不織布に関する。 The present invention relates to a non-woven fabric having irregularities on one side.

使い捨ておむつ、生理用ナプキン等の吸収性物品の肌対向面を形成するシート（表面シート）としては不織布が汎用されており、表面シート用の不織布には、肌触りやクッション感が良好であることが要望されている。不織布の肌触りやクッション感を向上させる手段としては、不織布に凹凸を付与する方法が従来知られており、そのような凹凸不織布が種々提案されている。 Non-woven fabrics are widely used as sheets (surface sheets) that form the skin-facing surfaces of absorbent articles such as disposable diapers and sanitary napkins, and the non-woven fabrics for surface sheets have a good feel and cushioning feeling. It is requested. As a means for improving the feel and cushioning of the non-woven fabric, a method of imparting unevenness to the non-woven fabric has been conventionally known, and various such non-woven fabrics have been proposed.

例えば特許文献１には、シート状の不織布を平面視した側の第１面側に突出する第１突出部と、該第１面側とは反対側の第２面側に突出する第２突出部とを有し、両突出部が、該不織布の平面視交差する異なる方向のそれぞれに交互に連続して配されている単層構造の不織布が記載されている。特許文献１記載の不織布において、第１突出部は凸部、第２突出部は凹部であり、第２突出部の頂部即ち凹部の底部に透孔が形成されていることで、液の吸収速度が速くなる上、液が配向方向に沿って流れ易くなるとされている。また特許文献１によれば、透孔の周囲の繊維が該透孔の中心方向に向かって配向しているため、特許文献１記載の不織布は、突出部が潰れにくく、良好なクッション性を維持し得るとされている。 For example, in Patent Document 1, a first projecting portion projecting toward the first surface side of the sheet-shaped non-woven fabric in a plan view and a second projecting portion projecting toward the second surface side opposite to the first surface side. Described is a non-woven fabric having a single-layer structure, which has a portion and both projecting portions are alternately and continuously arranged in different directions intersecting each other in a plan view. In the nonwoven fabric described in Patent Document 1, the first protruding portion is a convex portion and the second protruding portion is a concave portion, and a through hole is formed at the top of the second protruding portion, that is, at the bottom of the concave portion, so that the liquid absorption rate It is said that the speed becomes faster and the liquid becomes easier to flow along the orientation direction. Further, according to Patent Document 1, since the fibers around the through hole are oriented toward the center of the through hole, the non-woven fabric described in Patent Document 1 does not easily crush the protruding portion and maintains good cushioning property. It is said that it can be done.

また特許文献２には、第１のシートと第２のシートとが部分的に接合されて多数の接合部が形成されていると共に、該第１のシートにおける該接合部以外の部分に凸部が形成されている複合シートにおいて、該第２のシートにおける該凸部に対向する該第１のシートとの非接合部分に開孔部を形成することが記載されている。特許文献２によれば、斯かる複合シートは、高い液浸透性に加え、柔軟性や通気性にも優れており、吸収性物品の表面シートとして有用であるとされている。 Further, in Patent Document 2, the first sheet and the second sheet are partially joined to form a large number of joints, and a convex portion is formed on a portion of the first sheet other than the joint. It is described that in the composite sheet in which the above is formed, an opening portion is formed in a non-joint portion with the first sheet facing the convex portion in the second sheet. According to Patent Document 2, such a composite sheet is excellent in flexibility and breathability in addition to high liquid permeability, and is said to be useful as a surface sheet for an absorbent article.

特開２０１３−１３３５７４号公報Japanese Unexamined Patent Publication No. 2013-133574 特開２００７−１３０８１７号公報JP-A-2007-130817

特許文献１及び２記載の凹凸不織布は、肌触りやクッション感が良好ではあるが、近年凹凸不織布の汎用性が高まっていることなどもあって、凹凸不織布に要望される肌触りやクッション感のレベルはより高いものとなっている。近年要望されている高レベルの肌触りやクッション感を備えた不織布は未だ提供されていない。 The uneven non-woven fabrics described in Patent Documents 1 and 2 have good feel and cushioning feeling, but the level of touch and cushioning feeling required for the uneven non-woven fabric is high due to the increasing versatility of the uneven non-woven fabric in recent years. It is higher. Nonwoven fabrics with a high level of feel and cushioning, which have been demanded in recent years, have not yet been provided.

従って本発明の課題は、肌触り及びクッション感に優れた不織布を提供することに関する。 Therefore, an object of the present invention relates to providing a non-woven fabric having an excellent feel and cushioning feeling.

本発明は、片面に中空の凸部が複数散在し、それら複数の凸部の少なくとも一部における頂部に、該凸部の内外を連通する開孔が形成されており、前記開孔が形成された前記凸部においては、前記頂部に存する構成繊維の繊維間距離が、該頂部以外の部位に存する構成繊維の繊維間距離以上である不織布を提供するものである。 In the present invention, a plurality of hollow convex portions are scattered on one surface, and an opening communicating with the inside and outside of the convex portion is formed at the top of at least a part of the plurality of convex portions, and the opening is formed. In the convex portion, the non-woven fabric is provided in which the interfiber distance of the constituent fibers existing at the top is equal to or larger than the interfiber distance of the constituent fibers existing at a portion other than the top.

また本発明は、吸収体と該吸収体の肌対向面側に配された表面シートとを具備する吸収性物品であって、前記表面シートが、前記の本発明の不織布である吸収性物品を提供するものである。 Further, the present invention is an absorbent article comprising an absorber and a surface sheet arranged on the skin-facing surface side of the absorber, wherein the surface sheet is the non-woven fabric of the present invention. It is to provide.

本発明によれば、肌触り及びクッション感に優れた不織布、並びにそれを用いた吸収性物品が提供される。 According to the present invention, a non-woven fabric having an excellent feel and cushioning feeling, and an absorbent article using the non-woven fabric are provided.

図１は、本発明の吸収性物品の一実施形態である使い捨ておむつの肌対向面即ち表面シート側を模式的に示す平面図であり、各部の弾性部材を伸張させて平面状に拡げた展開状態における平面図である。FIG. 1 is a plan view schematically showing a skin-facing surface, that is, a surface sheet side of a disposable diaper, which is an embodiment of an absorbent article of the present invention, and an elastic member of each part is stretched and expanded in a plane. It is a plan view in a state. 図２は、図１のＩ−Ｉ線断面を模式的に示す横断面図である。FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 図３は、図１に示すおむつに配されている表面シート（本発明の不織布の一実施形態）の肌対向面側の一部を模式的に示す斜視図である。FIG. 3 is a perspective view schematically showing a part of the surface sheet (one embodiment of the non-woven fabric of the present invention) arranged on the diaper shown in FIG. 1 on the skin-facing surface side. 図４は、図３に示す表面シートの厚み方向（凸部の高さ方向）に沿う断面を模式的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing a cross section along the thickness direction (height direction of the convex portion) of the surface sheet shown in FIG. 図５は、本発明の不織布の他の実施形態の厚み方向（凸部の高さ方向）に沿う断面を模式的に示す断面図（図４相当図）である。FIG. 5 is a cross-sectional view (corresponding to FIG. 4) schematically showing a cross section along the thickness direction (height direction of the convex portion) of another embodiment of the nonwoven fabric of the present invention.

以下、本発明の不織布を、これを具備する本発明の吸収性物品と共に、それらの好ましい実施形態に基づき図面を参照して説明する。図１及び図２には、本発明の吸収性物品の一実施形態である使い捨ておむつ１が示されている。おむつ１は、着用時に着用者の腹側に配される腹側部１Ｆ及び背側に配される背側部１Ｒとそれらの間に位置する股下部１Ｍとを有すると共に、腹側部１Ｆから股下部１Ｍを介して背側部１Ｒに延び、着用者の前後方向に相当する縦方向Ｘと、これに直交する横方向Ｙとを有する。股下部１Ｍは、おむつ１の着用時に着用者のペニス等の排泄部に対向配置される排泄部対向部を有しており、該排泄部対向部は通常、おむつ１の縦方向Ｘの中央部又はその近傍に位置している。 Hereinafter, the nonwoven fabric of the present invention will be described together with the absorbent article of the present invention comprising the non-woven fabric of the present invention with reference to the drawings based on their preferred embodiments. 1 and 2 show a disposable diaper 1 which is an embodiment of the absorbent article of the present invention. The diaper 1 has a ventral portion 1F arranged on the ventral side of the wearer and a dorsal portion 1R arranged on the dorsal side when worn, and a crotch portion 1M located between them, and from the ventral portion 1F. It extends from the crotch portion 1M to the dorsal side portion 1R, and has a vertical direction X corresponding to the front-back direction of the wearer and a lateral direction Y orthogonal to the vertical direction X. The lower crotch 1M has an excretion portion facing portion that is arranged to face the excretion portion such as the wearer's penis when the diaper 1 is worn, and the excretion portion facing portion is usually the central portion of the diaper 1 in the vertical direction X. It is located in or near it.

おむつ１は、図１及び図２に示すように、吸収体４と、該吸収体４の肌対向面側に配され、着用時に着用者の肌と接触し得る液透過性の表面シート２と、該吸収体４の非肌対向面側に配された液不透過性ないし撥水性の裏面シート３とを具備し、図１に示す如き平面視において、股下部１Ｍに位置する縦方向Ｘの中央部が内方に括れ且つ一方向即ち縦方向Ｘに長い、縦長の砂時計状をなしている。表面シート２及び裏面シート３は、それぞれ、両シート２，３間に介在配置された吸収体４よりも大きな寸法を有している。裏面シート３は表面シート２よりも大きな寸法を有し、吸収体４の周縁から外方に延出し、図１に示す如き展開且つ伸張状態のおむつ１の外形を形成している。裏面シート３としては、この種の吸収性物品に従来用いられている各種のものを特に制限なく用いることができ、樹脂フィルム、樹脂フィルムと不織布等とのラミネート等を用いることができる。 As shown in FIGS. 1 and 2, the diaper 1 includes an absorber 4 and a liquid-permeable surface sheet 2 that is arranged on the skin-facing surface side of the absorber 4 and can come into contact with the wearer's skin when worn. A liquid-impermeable or water-repellent back sheet 3 arranged on the non-skin facing surface side of the absorber 4, and in a plan view as shown in FIG. 1, in the vertical direction X located at the lower crotch 1M. The central part is constricted inward and has a vertically long hourglass shape that is long in one direction, that is, in the vertical direction X. The front surface sheet 2 and the back surface sheet 3 each have a larger size than the absorber 4 interposed between the two sheets 2 and 3. The back surface sheet 3 has a larger size than the front surface sheet 2 and extends outward from the peripheral edge of the absorber 4 to form the outer shape of the unfolded and stretched diaper 1 as shown in FIG. As the back sheet 3, various types conventionally used for this kind of absorbent article can be used without particular limitation, and a resin film, a laminate of a resin film and a non-woven fabric, or the like can be used.

本明細書において、「肌対向面」は、吸収性物品又はその構成部材（例えば表面シート２）における、吸収性物品の着用時に着用者の肌側に向けられる面、即ち相対的に着用者の肌に近い側であり、「非肌対向面」は、吸収性物品又はその構成部材における、吸収性物品の着用時に肌側とは反対側、即ち相対的に着用者の肌から遠い側に向けられる面である。尚、ここでいう「着用時」は、通常の適正な着用位置、即ち当該吸収性物品の正しい着用位置が維持された状態を意味し、吸収性物品が該着用位置からずれた状態にある場合は含まない。 In the present specification, the "skin facing surface" is a surface of the absorbent article or its constituent members (for example, the surface sheet 2) that is directed toward the skin side of the wearer when the absorbent article is worn, that is, relatively of the wearer. The side closer to the skin, the "non-skin facing surface" is the side of the absorbent article or its constituents that is opposite to the skin side when the absorbent article is worn, that is, toward the side relatively far from the wearer's skin. It is the surface to be. In addition, "when worn" here means a state in which the normal proper wearing position, that is, the correct wearing position of the absorbent article is maintained, and the absorbent article is in a state deviated from the wearing position. Does not include.

吸収体４は、図１に示す如き平面視において縦方向Ｘに長い形状をなし、腹側部１Ｆから背側部１Ｒにわたって延在している。吸収体４は、吸収性材料を含む液保持性の吸収性コア４０と、該吸収性コア４０の肌対向面及び非肌対向面を被覆するコアラップシート４１とを含んで構成されている。吸収性コア４０とコアラップシート４１との間は、ホットメルト型接着剤等の公知の接合手段により接合されている。吸収性コア４０は単層構造であり、図１に示す如き平面視において、長手方向即ち縦方向Ｘの中央部が内方に括れた砂時計状をなしている。 The absorber 4 has a long shape in the vertical direction X in a plan view as shown in FIG. 1, and extends from the ventral side portion 1F to the dorsal side portion 1R. The absorber 4 includes a liquid-retaining absorbent core 40 containing an absorbent material and a core wrap sheet 41 that covers the skin-facing surface and the non-skin-facing surface of the absorbent core 40. The absorbent core 40 and the core wrap sheet 41 are joined by a known joining means such as a hot melt type adhesive. The absorbent core 40 has a single-layer structure, and in a plan view as shown in FIG. 1, it has an hourglass shape in which the central portion in the longitudinal direction, that is, the longitudinal direction X is constricted inward.

吸収性コア４０は吸収性材料を含むコア形成材料が積繊されてなる。吸収性材料としては、この種の吸収性コアの形成材料として通常用いられるものを特に制限なく用いることができ、例えば、木材パルプ、親水化剤により処理された合繊繊維等の親水性繊維や吸水性ポリマー粒子が挙げられる。即ち、吸収性コア４０は、親水性繊維の積繊体、あるいは該積繊体に吸水性ポリマー粒子を担持させたものであり得る。また、コアラップシート４１としては、透水性のシート材を用いることができ、例えば、紙、不織布等を用いることができる。本実施形態におけるコアラップシート４１は、吸収性コア４０の横方向Ｙの長さの２倍以上３倍以下の幅を有する１枚の連続したシートであるが、本発明においてはこれに限定されず、例えば、吸収性コア４０の肌対向面を被覆する肌側コアラップシートと、吸収性コア４０の非肌対向面を被覆する非肌側コアラップシートとを含み、且つ両シートがそれぞれ別体のシートであっても良い。 The absorbent core 40 is made by stacking core-forming materials including an absorbent material. As the absorbent material, those usually used as a material for forming this kind of absorbent core can be used without particular limitation. For example, hydrophilic fibers such as wood pulp and synthetic fibers treated with a hydrophilizing agent and water absorption can be used. Examples include sex polymer particles. That is, the absorbent core 40 may be a laminated fiber of hydrophilic fibers, or a laminated fiber in which water-absorbing polymer particles are supported. Further, as the core wrap sheet 41, a water-permeable sheet material can be used, and for example, paper, non-woven fabric, or the like can be used. The core wrap sheet 41 in the present embodiment is one continuous sheet having a width of 2 times or more and 3 times or less the length of the lateral Y of the absorbent core 40, but the present invention is limited to this. For example, a skin-side core wrap sheet that covers the skin-facing surface of the absorbent core 40 and a non-skin-side core wrap sheet that covers the non-skin-facing surface of the absorbent core 40 are included, and both sheets are separate. It may be a body sheet.

おむつ１の表面シート２側における縦方向Ｘに沿う左右両側には、それぞれサイドシート５が配されている。サイドシート５は、縦方向Ｘに沿う内側縁部と、該内側縁部よりも横方向Ｙの外方に位置して縦方向Ｘに沿う外側縁部とを有し、図１に示す如き平面視において、該内側縁部は吸収体４と重なり、該外側縁部は、図２に示すように、吸収体４の縦方向Ｘに沿う側縁から横方向Ｙの外方に延出し裏面シート３と接合されている。着用者の脚周りに配される左右のレッグ部におけるサイドシート５と裏面シート３との間には、糸状の弾性部材５０が縦方向Ｘに沿って伸長状態で固定されており、これにより、おむつ１の着用時におけるレッグ部には、弾性部材５０の収縮により一対のレッグギャザーが形成される。また、サイドシート５の内側縁部には、糸状の弾性部材５１が縦方向Ｘに沿って伸長状態で固定されており、これにより、おむつ１の着用時には弾性部材５１の収縮により少なくとも股下部１Ｍにおいて、サイドシート５は裏面シート３との接合部を起点として該内側縁部側が着用者の肌側に向かって起立し、防漏カフを形成する。この防漏カフは、尿等の排泄液の横方向Ｙの外方への流出いわゆる横漏れを防止し得る。表面シート２、裏面シート３、吸収体４、サイドシート５及び弾性部材５０，５１は、ホットメルト型接着剤等の公知の接合手段により互いに接合されている。 Side sheets 5 are arranged on both the left and right sides along the vertical direction X on the surface sheet 2 side of the diaper 1. The side sheet 5 has an inner edge portion along the vertical direction X and an outer edge portion located outside the inner edge portion in the horizontal direction Y and along the vertical direction X, and has a plane as shown in FIG. In view, the inner edge portion overlaps with the absorber 4, and the outer edge portion extends outward in the horizontal direction Y from the side edge of the absorber 4 along the vertical direction X as shown in FIG. It is joined with 3. A thread-like elastic member 50 is fixed in an extended state along the vertical direction X between the side sheet 5 and the back sheet 3 at the left and right leg portions arranged around the wearer's legs. A pair of leg gathers are formed on the leg portion when the diaper 1 is worn due to the contraction of the elastic member 50. Further, a thread-like elastic member 51 is fixed to the inner edge of the side sheet 5 in an extended state along the vertical direction X, whereby when the diaper 1 is worn, the elastic member 51 contracts and at least the lower part of the crotch is 1M. In the side sheet 5, the inner edge side of the side sheet 5 stands up toward the wearer's skin side starting from the joint with the back surface sheet 3 to form a leak-proof cuff. This leak-proof cuff can prevent so-called lateral leakage of excrement liquid such as urine to the outside in the lateral direction Y. The front surface sheet 2, the back surface sheet 3, the absorber 4, the side sheets 5, and the elastic members 50 and 51 are bonded to each other by a known bonding means such as a hot melt type adhesive.

おむつ１はいわゆる展開型の使い捨ておむつであり、図１に示すように、おむつ１の背側部１Ｒの縦方向Ｘに沿う両側縁部には、一対のファスニングテープ６，６が設けられている。ファスニングテープ６には、機械的面ファスナーのオス部材からなる図示しない止着部が取り付けられている。また、おむつ１の腹側部１Ｆの非肌対向面には、機械的面ファスナーのメス部材からなる被止着領域７が形成されている。被止着領域７は、腹側部１Ｆの非肌対向面を形成する裏面シート３の非肌対向面に、機械的面ファスナーのメス部材を公知の接合手段、例えば接着剤やヒートシール等で接合固定して形成されており、ファスニングテープ６の前記止着部を着脱自在に止着可能になされている。 The diaper 1 is a so-called deployable disposable diaper, and as shown in FIG. 1, a pair of fastening tapes 6 and 6 are provided on both side edges of the dorsal portion 1R of the diaper 1 along the longitudinal direction X. .. A fastening portion (not shown) made of a male member of a mechanical hook-and-loop fastener is attached to the fastening tape 6. Further, a landing region 7 made of a female member of a mechanical hook-and-loop fastener is formed on the non-skin facing surface of the ventral side 1F of the diaper 1. In the landing region 7, a female member of a mechanical hook-and-loop fastener is attached to the non-skin facing surface of the back sheet 3 forming the non-skin facing surface on the ventral side 1F by a known joining means such as an adhesive or a heat seal. It is formed by joining and fixing, and the fastening portion of the fastening tape 6 can be detachably fastened.

以下、表面シート２について説明する。図３及び図４には、表面シート２の一部が拡大して示されている。表面シート２は、本発明の不織布の一実施形態であり、片面、具体的には肌対向面２ａに凸部２４が複数散在している。複数の凸部２４はそれぞれ中空であり、図４に示すように、凸部２４の内部には表面シート２の形成材料は充填されておらず、空間部が形成されている。 Hereinafter, the surface sheet 2 will be described. 3 and 4 show a part of the surface sheet 2 in an enlarged manner. The surface sheet 2 is an embodiment of the non-woven fabric of the present invention, and a plurality of convex portions 24 are scattered on one side, specifically, the skin facing surface 2a. Each of the plurality of convex portions 24 is hollow, and as shown in FIG. 4, the inside of the convex portions 24 is not filled with the forming material of the surface sheet 2, and a space portion is formed.

本実施形態においては、表面シート２は、第１不織布２１と第２不織布２２との積層体２０を含んで構成されている。凸部２４は、第１不織布２１に形成されていて第２不織布２２には形成されていない。第２不織布２２は、凸部２４以外の部位において第１不織布２１に接合されており、凸部２４の周辺部には両不織布２１，２２の接合部２３が形成されている。接合部２３はいわゆる凹部である。接合部２３における両不織布２１，２２の接合形態は特に限定されず、融着、接着剤による接合等、公知の接合形態を採ることができる。例えば、接合部２３において両不織布２１，２２が融着している形態は、熱を伴うか又は伴わないエンボス加工、超音波エンボス加工等の公知のエンボス加工によって形成することができる。 In the present embodiment, the surface sheet 2 includes a laminate 20 of the first non-woven fabric 21 and the second non-woven fabric 22. The convex portion 24 is formed on the first non-woven fabric 21 and not on the second non-woven fabric 22. The second non-woven fabric 22 is bonded to the first non-woven fabric 21 at a portion other than the convex portion 24, and the bonding portions 23 of both non-woven fabrics 21 and 22 are formed at the peripheral portion of the convex portion 24. The joint portion 23 is a so-called recess. The joining form of both non-woven fabrics 21 and 22 in the joining portion 23 is not particularly limited, and known joining forms such as fusion and bonding with an adhesive can be adopted. For example, the form in which both non-woven fabrics 21 and 22 are fused at the joint portion 23 can be formed by known embossing such as embossing with or without heat and ultrasonic embossing.

つまり、積層体２０においては、第１不織布２１と第２不織布２２とが接合されて接合部２３が形成され、第１不織布２１が、接合部２３以外の部位において第２不織布２２から離れる方向に突出して、着用者の肌側に向かって突出する複数の中空の凸部２４を形成している。そして、積層体２０を含んで構成される表面シート２は、着用者の肌に近い側に位置する第１不織布２１と、着用者の肌から遠い側に位置する第２不織布２２とを有し、両不織布２１，２２が、接合部２３によって厚み方向に一体化されており、第１不織布２１における接合部２３以外の部分の複数箇所が、第２不織布２２とは反対側に凸状に隆起して、肌対向面２ａ（第１不織布２１における第２不織布２２との対向面とは反対側の面）の複数の凸部２４を形成している。表面シート２は、非肌対向面２ｂ（第２不織布２２における第１不織布２１との対向面とは反対側の面）が略平坦であり、肌対向面２ａに凸部２４と接合部２３（凹部）とからなる凹凸が形成されている。 That is, in the laminated body 20, the first non-woven fabric 21 and the second non-woven fabric 22 are joined to form the joint portion 23, and the first non-woven fabric 21 is separated from the second non-woven fabric 22 at a portion other than the joint portion 23. It protrudes to form a plurality of hollow protrusions 24 that protrude toward the wearer's skin side. The surface sheet 2 including the laminated body 20 has a first non-woven fabric 21 located on the side closer to the wearer's skin and a second non-woven fabric 22 located on the side farther from the wearer's skin. , Both non-woven fabrics 21 and 22 are integrated in the thickness direction by the joint portion 23, and a plurality of portions of the first non-woven fabric 21 other than the joint portion 23 are convexly raised on the side opposite to the second non-woven fabric 22. As a result, a plurality of convex portions 24 on the skin-facing surface 2a (the surface of the first non-woven fabric 21 opposite to the surface facing the second non-woven fabric 22) are formed. In the surface sheet 2, the non-skin facing surface 2b (the surface of the second non-woven fabric 22 opposite to the first non-woven fabric 21 facing surface) is substantially flat, and the convex portion 24 and the joint portion 23 (the surface of the second non-woven fabric 22 facing the first non-woven fabric 21) are substantially flat. Concavities and convexities consisting of recesses) are formed.

本実施形態においては、複数の凸部２４は、それぞれ、平面視円形状をなし、また、図４に示す如き表面シート２の厚み方向に沿う断面視において略円弧状をなし、上方（着用者の肌側）に向かうに従って幅が漸次減少している。凸部２４の頂部２４ａは丸みを帯びており、尖鋭ではない。複数の凸部２４は、表面シート２の肌対向面２ａの全域にわたって散点状に規則的に分散配置されており、より具体的には、複数の凸部２４は縦方向Ｘ及び横方向Ｙの両方向に間欠的に配されている。また本実施形態においては、各凸部２４の全周囲にわたって接合部２３が配されており、接合部２３は表面シート２の肌対向面２ａの全域にわたって連続している。 In the present embodiment, the plurality of convex portions 24 each have a circular shape in a plan view, and also have a substantially arc shape in a cross-sectional view along the thickness direction of the surface sheet 2 as shown in FIG. 4, and are upward (wearer). The width gradually decreases toward the skin side). The top 24a of the convex portion 24 is rounded and not sharp. The plurality of convex portions 24 are regularly distributed and arranged in a scattered pattern over the entire area of the skin facing surface 2a of the surface sheet 2. More specifically, the plurality of convex portions 24 are arranged in the vertical direction X and the horizontal direction Y. It is arranged intermittently in both directions. Further, in the present embodiment, the joint portion 23 is arranged over the entire circumference of each convex portion 24, and the joint portion 23 is continuous over the entire area of the skin facing surface 2a of the surface sheet 2.

尚、凸部２４の形成パターン、即ち、凸部２４の配置及び形態は図示のものに限定されず、本発明の趣旨を逸脱しない範囲で任意のものを選択することができる。例えば、凸部２４の平面視形状は、図示の円形以外に、楕円形、正方形、長方形等にすることができる。また、凸部２４の配置はいわゆる千鳥配置にすることができる。千鳥配置の凸部２４においては、複数の凸部２４が一方向（例えば縦方向Ｘ）に所定間隔を置いて直線的に列状に配置されて凸部列をなし、その凸部列が該一方向と直交する方向（横方向Ｙ）に間欠配置されており、且つ該一方向と直交する方向（横方向Ｙ）において、隣在する該凸部列どうしで互いに凸部２４がずれている。 The formation pattern of the convex portion 24, that is, the arrangement and the form of the convex portion 24 is not limited to the one shown in the drawing, and any one can be selected without departing from the spirit of the present invention. For example, the plan view shape of the convex portion 24 can be an ellipse, a square, a rectangle, or the like, in addition to the circular shape shown in the figure. Further, the arrangement of the convex portions 24 can be a so-called staggered arrangement. In the staggered convex portions 24, a plurality of convex portions 24 are linearly arranged in a row at predetermined intervals in one direction (for example, the vertical direction X) to form a convex portion row, and the convex portion rows are the convex portions 24. The convex portions 24 are intermittently arranged in a direction orthogonal to one direction (horizontal direction Y), and the convex portions 24 are displaced from each other by the adjacent convex portions rows in the direction orthogonal to the one direction (horizontal direction Y). ..

また接合部２３の配置及び形態は、図３に示す如き、表面シート２の肌対向面２ａの全域にわたって連続した形成パターンに限定されず、本発明の趣旨を逸脱しない範囲で任意のものを選択することができる。例えば、複数の接合部２３が、表面シート２の肌対向面２ａの全域にわたって散点状に規則的に分散配置（例えば千鳥配置）され、それによって複数の凸部２４が、それぞれ、複数の接合部２３によって囲まれ、各凸部２４を囲んでいる複数の接合部２３が、当該凸部２４の周囲に間欠的に配置されている形態を採ることもできる。エンボス加工によって形成された接合部２３は、表面シート２の形成材料が圧密化されているため、周辺部（凸部２４）に比して高密度で剛性が高く硬い部位であるところ、そのような比較的硬い複数の接合部２３が平面視散点状に形成されている形態は、図３に示す如き、接合部２３が表面シート２の肌対向面２ａの全域にわたって連続している形態に比して、表面シート２の柔軟性が向上し得る。複数の接合部２３の平面視形状は特に制限されず、円形、楕円形、正方形、長方形等から適宜選択すれば良い。 Further, the arrangement and the form of the joint portion 23 are not limited to the continuous formation pattern over the entire area of the skin facing surface 2a of the surface sheet 2 as shown in FIG. 3, and any one can be selected within a range not deviating from the gist of the present invention. can do. For example, the plurality of joints 23 are regularly distributed (for example, staggered) in a scattered pattern over the entire area of the skin facing surface 2a of the surface sheet 2, whereby the plurality of convex portions 24 are each joined. It is also possible to take a form in which a plurality of joint portions 23 surrounded by the portions 23 and surrounding each convex portion 24 are intermittently arranged around the convex portion 24. Since the material for forming the surface sheet 2 is compacted in the joint portion 23 formed by the embossing process, the joint portion 23 is a portion having a higher density, higher rigidity and higher hardness than the peripheral portion (convex portion 24). The form in which a plurality of relatively hard joint portions 23 are formed in a plane-viewing spot shape is a form in which the joint portions 23 are continuous over the entire area of the surface sheet 2 facing the skin, as shown in FIG. In comparison, the flexibility of the surface sheet 2 can be improved. The plan-view shape of the plurality of joints 23 is not particularly limited, and may be appropriately selected from a circle, an ellipse, a square, a rectangle, and the like.

表面シート２の特徴的な構成の１つとして、図３及び図４に示すように、複数の凸部２４の少なくとも一部における頂部２４ａに、凸部２４の内外を連通する開孔２４０が１個形成されている点が挙げられる。凸部２４の頂部２４ａは、おむつ１の着用者の肌と直接触れる部位であり、肌触りやクッション感を決定づける重要な要素であるところ、斯かる頂部２４ａに開孔２４０が形成されていることにより、頂部２４ａが外力を受けたとき、具体的には例えばおむつ１の着用中において頂部２４ａに着用者の肌が触れたときに、動きやすいものとなり、それによって表面シート２の肌触り及びクッション感の向上に繋がり得る。 As one of the characteristic configurations of the surface sheet 2, as shown in FIGS. 3 and 4, the top 24a of at least a part of the plurality of convex portions 24 has one opening 240 for communicating the inside and outside of the convex portion 24. The point that it is individually formed can be mentioned. The top 24a of the convex portion 24 is a portion that comes into direct contact with the skin of the wearer of the diaper 1, and is an important factor that determines the feel and cushioning feeling. Since the opening 240 is formed in the top 24a. When the top 24a receives an external force, specifically, for example, when the wearer's skin touches the top 24a while wearing the diaper 1, the surface sheet 2 becomes easy to move, thereby giving the surface sheet 2 a feeling of touch and cushioning. It can lead to improvement .

尚、凸部２４の頂部２４ａ即ち開孔２４０及びその周辺部は、図４に示すように、凸部２４を高さ方向に３等分した場合の最上部に位置する部位であり、３等分された凸部２４において、最下部は基端部２４ｃ、頂部２４ａと基端部２４ｃとの間は中腹部２４ｂである。尚、このように表面シートの凸部を高さ方向に３等分することは、凸部に対してその頂部側から高さ方向に１ｇｆ／ｃｍ²の荷重をかけ、その低加圧状態の凸部を、マイクロスコープ（株式会社キーエンス製ＶＨＸ−１０００）を用いて観察しつつ行う。 As shown in FIG. 4, the top portion 24a of the convex portion 24, that is, the opening 240 and its peripheral portion is a portion located at the uppermost portion when the convex portion 24 is divided into three equal parts in the height direction, and is a portion located at the uppermost portion. In the divided convex portion 24, the lowermost portion is the base end portion 24c, and the middle abdomen portion 24b is between the top end portion 24a and the base end portion 24c. In addition, in order to divide the convex portion of the surface sheet into three equal parts in the height direction in this way, a load of 1 gf / cm ² is applied to the convex portion in the height direction from the top side thereof, and the convex portion is in a low pressure state. The convex portion is observed while observing with a microscope (VHX-1000 manufactured by KEYENCE CORPORATION).

本実施形態においては、開孔２４０は平面視円形状をなしているが、開孔２４０の平面視形状は円形に限定されず任意の形状を選択可能であり、例えば楕円形でも良い。開孔２４０の平面視における最大長さは、肌触り及びクッション感の向上効果と凸部２４の保形性等とのバランスの観点から、好ましくは０．２ｍｍ以上、さらに好ましくは０．５ｍｍ以上、そして、好ましくは５．０ｍｍ以下、さらに好ましくは２．０ｍｍ以下である。尚、開孔２４０の平面視における最大長さは、開孔２４０の平面視形状が円形の場合は直径、楕円形の場合は長軸の長さである。 In the present embodiment, the opening 240 has a circular shape in a plan view, but the plan view shape of the opening 240 is not limited to a circle, and any shape can be selected. For example, an elliptical shape may be used. The maximum length of the opening 240 in a plan view is preferably 0.2 mm or more, more preferably 0.5 mm or more, from the viewpoint of the balance between the effect of improving the feel and cushioning feeling and the shape retention of the convex portion 24. Then, it is preferably 5.0 mm or less, more preferably 2.0 mm or less. The maximum length of the hole 240 in a plan view is the diameter when the hole 240 has a circular shape and the length of the major axis when the shape of the hole 240 is elliptical.

開孔２４０は、表面シート２の肌対向面２ａに形成されている複数の凸部２４の一部にのみ形成されていても良いが、肌触り及びクッション感の向上効果をより確実に奏させるようにする観点から、複数の凸部２４の全部に形成されていることが好ましい。例えば、表面シート２の肌対向面２ａに互いに高さの異なる２種類の凸部２４が形成されている場合は、少なくとも相対的に高さの高い凸部２４に開孔２４０が形成されていることが好ましい。本実施形態においては、複数の凸部２４は互いに高さが同じであり、それらの全部に開孔２４０が形成されている。 The opening 240 may be formed only in a part of a plurality of convex portions 24 formed on the skin facing surface 2a of the surface sheet 2, but the effect of improving the touch and cushioning feeling can be more reliably achieved. It is preferable that the convex portions 24 are formed on all of the plurality of convex portions 24. For example, when two types of convex portions 24 having different heights are formed on the skin-facing surface 2a of the surface sheet 2, the openings 240 are formed in at least the relatively high convex portions 24. Is preferable. In the present embodiment, the plurality of convex portions 24 have the same height as each other, and openings 240 are formed in all of them.

尚、本実施形態においては、第１不織布２１のみにこれを厚み方向に貫通する貫通孔である開孔２４０が形成され、第２不織布２２にはこれを厚み方向に貫通する貫通孔は形成されていない。ここでいう「貫通孔」とは、意図的に形成された貫通孔を意味し、繊維間空隙のような、不織布に本来的に含まれている微細孔構造を含まない。つまり、本実施形態においては、表面シート２を構成する積層体２０において、着用者の肌に相対的に近いシート（第１不織布２１）には貫通孔が形成されているが、着用者の肌から相対的に遠いシート（第２不織布２２）には貫通孔は形成されていない。一方、特許文献２記載の複合シートにおいては、該複合シートを構成する不織布の積層体のうち、着用者の肌から相対的に遠いシートに貫通孔が形成されており、積層体における貫通孔の形成部位に関して本実施形態とは対照的である。このような、本実施形態の表面シート２と特許文献２記載の複合シートとにおける貫通孔に関する相違は、主として貫通孔の機能の違いに起因するものである。即ち、特許文献２記載の複合シートにおける貫通孔は、主として液流れを改善し、該複合シートよりも着用者の肌から遠い側に配された吸収体に液を移行させやすくするためのものであり、それ故に、着用者の肌から相対的に遠いシートに貫通孔が形成されている。これに対し、本実施形態の表面シート２における開孔２４０は、前述した通り、肌触り及びクッション感の向上の観点から凸部２４を外力によって動きやすいものとするためのものであり、それ故に、凸部２４自体（着用者の肌に相対的に近いシート）に形成される必要がある。また仮に、本実施形態のおむつ１において、第２不織布２２における開孔２４０に対応する位置に該第２不織布を厚み方向に貫通する貫通孔が形成されていると、表面シート２の厚み方向に該貫通孔と開孔２４０とからなる全体貫通孔が形成されることになるところ、該全体貫通孔から肌触りの悪いコアラップシート４１が肌対向面に露出し、表面シート２の肌触りを損なうおそれがあることから、本実施形態において、第２不織布２２に貫通孔を形成しないことがより好ましい。 In the present embodiment, only the first nonwoven fabric 21 is formed with an opening 240 which is a through hole penetrating the first nonwoven fabric 21 in the thickness direction, and the second nonwoven fabric 22 is formed with a through hole penetrating the through hole 240 in the thickness direction. Not done. The term "through hole" as used herein means a through hole that is intentionally formed, and does not include a micropore structure originally contained in the non-woven fabric, such as an interfiber gap. That is, in the present embodiment, in the laminate 20 constituting the surface sheet 2, the sheet (first non-woven fabric 21) relatively close to the wearer's skin has through holes, but the wearer's skin. No through hole is formed in the sheet (second non-woven fabric 22) relatively far from the sheet. On the other hand, in the composite sheet described in Patent Document 2, through holes are formed in the laminated body of the non-woven fabrics constituting the composite sheet, which is relatively far from the wearer's skin, and the through holes in the laminated body are formed. This is in contrast to this embodiment in terms of formation site. Such a difference regarding the through hole between the surface sheet 2 of the present embodiment and the composite sheet described in Patent Document 2 is mainly due to the difference in the function of the through hole. That is, the through holes in the composite sheet described in Patent Document 2 are mainly for improving the liquid flow and facilitating the transfer of the liquid to the absorber arranged on the side farther from the wearer's skin than the composite sheet. Yes, therefore, through holes are formed in the sheet that is relatively far from the wearer's skin. On the other hand, the opening 240 in the surface sheet 2 of the present embodiment is for making the convex portion 24 easy to move by an external force from the viewpoint of improving the touch and the cushioning feeling, as described above. It needs to be formed on the convex portion 24 itself (a sheet relatively close to the wearer's skin). Further, if, in the diaper 1 of the present embodiment, a through hole that penetrates the second nonwoven fabric in the thickness direction is formed at a position corresponding to the opening 240 in the second nonwoven fabric 22, if a through hole is formed in the thickness direction of the surface sheet 2. When the entire through hole including the through hole and the opening 240 is formed, the core wrap sheet 41 which is not soft to the touch may be exposed on the surface facing the skin from the overall through hole, which may impair the feel of the surface sheet 2. Therefore, in the present embodiment, it is more preferable not to form a through hole in the second non-woven fabric 22.

前述した通り、表面シート２の肌対向面２ａに存する凸部２４の頂部２４ａに開孔２４０を形成することで、表面シート２の肌触り及びクッション感の向上に繋がり得るが、斯かる構成だけでは十分な効果は得られない。表面シート２の肌触り及びクッション感の向上にはさらに、開孔２４０が形成された凸部２４において、頂部２４ａ（即ち開孔２４０及びその周辺部）に存する構成繊維のうち、開孔２４０を除いた開孔周囲部の繊維間距離が、頂部２４ａ以外の部位（即ち中腹部２４ｂ及び基端部２４ｃ）に存する構成繊維の繊維間距離以上であることが必要である。 As described above, forming the opening 240 in the top 24a of the convex portion 24 existing on the skin facing surface 2a of the surface sheet 2 can lead to improvement of the touch and cushioning feeling of the surface sheet 2, but such a configuration alone can lead to improvement. Not enough effect can be obtained. Further, in order to improve the feel and cushioning feeling of the surface sheet 2, in the convex portion 24 in which the opening 240 is formed, among the constituent fibers existing in the top 24a (that is, the opening 240 and its peripheral portion), the opening 240 is excluded. It is necessary that the interfiber distance around the perforated opening is equal to or greater than the interfiber distance of the constituent fibers existing in the portions other than the top 24a (that is, the middle abdomen 24b and the proximal end 24c).

つまり、表面シート２に高レベルの肌触り及びクッション感を付与するためには、凸部２４の頂部２４ａに開孔２４０を形成することに加えてさらに、開孔２４０が形成された凸部２４に存する構成繊維の繊維間距離を、該凸部２４全体で同等にするか、又は頂部２４ａが最長となるようにする必要がある。 That is, in order to give the surface sheet 2 a high level of touch and cushioning, in addition to forming the opening 240 in the top 24a of the convex portion 24, the convex portion 24 in which the opening 240 is formed is further formed. It is necessary to make the interfiber distances of the existing constituent fibers equal in the entire convex portion 24, or to make the top portion 24a the longest.

特に好ましい形態は、開孔２４０が形成された凸部２４における構成繊維の繊維間距離が、頂部２４ａが最も長く、開孔２４０から凸部２４の高さ方向に離れるに従って漸次短くなる形態である。即ち、開孔２４０が形成された凸部２４においては、構成繊維の繊維間距離に関し、頂部２４ａ＞中腹部２４ｂ＞基端部２４ｃなる大小関係が成立していることが特に好ましい。 A particularly preferable form is a form in which the interfiber distance of the constituent fibers in the convex portion 24 in which the opening 240 is formed is the longest at the top 24a and gradually shortens as the distance from the opening 240 in the height direction of the convex portion 24 increases. .. That is, in the convex portion 24 in which the opening 240 is formed, it is particularly preferable that the magnitude relationship of top 24a> middle abdomen 24b> base end 24c is established with respect to the interfiber distance of the constituent fibers.

またこのように、開孔２４０が形成されている凸部２４の頂部２４ａ、即ち開孔２４０及びその周辺部に存する構成繊維の繊維間距離を、該凸部２４において最長とするためには、頂部２４ａにおける繊維間距離が短すぎないこと、つまり、頂部２４ａにおいて構成繊維が高度に密集していないことが重要となる。斯かる観点から、開孔２４０の形成方法としては、構成繊維の軟化溶融を伴う方法、例えば頂部２４ａの加熱を伴う方法は採用しないことが好ましい。例えば、公知の熱を伴うエンボス加工によって凸部２４の頂部２４ａに開孔２４０を形成した場合、そうして形成された開孔２４０の開孔縁部には、該エンボス加工によって軟化溶融した構成繊維の融着部が形成されるため、頂部２４ａに存する構成繊維の繊維間距離は極端に短いものとなるか、あるいは頂部２４ａの略全体が該融着部となって繊維間空隙が実質的に存在しない状態となるおそれがある。要は、凸部２４は、少なくとも頂部２４ａに、好ましくは凸部２４全体に、構成繊維の融着部を有していないことが好ましい。 Further, in order to maximize the interfiber distance of the constituent fibers existing in the top 24a of the convex portion 24 in which the opening 240 is formed, that is, the opening 240 and its peripheral portion, in the convex portion 24, It is important that the interfiber distance at the top 24a is not too short, that is, the constituent fibers are not highly dense at the top 24a. From such a viewpoint, it is preferable not to adopt a method involving softening and melting of the constituent fibers, for example, a method involving heating of the top 24a, as the method for forming the opening 240. For example, when an opening 240 is formed in the top 24a of the convex portion 24 by a known heat-embossing process, the opening edge portion of the opening 240 formed in this way is softened and melted by the embossing process. Since the fused portion of the fiber is formed, the distance between the fibers of the constituent fibers existing in the top 24a becomes extremely short, or substantially the entire top 24a becomes the fused portion and the interfiber gap becomes substantially. There is a risk that it will not exist in. In short, it is preferable that the convex portion 24 does not have a fused portion of the constituent fibers at least on the top portion 24a, preferably on the entire convex portion 24.

開孔２４０の形成方法として好ましいのは、頂部２４ａの加熱を伴わない非加熱法であり、具体的には例えば、ｉ）開孔２４０の形成予定部位を物理的に押圧して、該部位に存する構成繊維をより分けることによって開孔２４０を形成する方法、ｉｉ）開孔２４０の形成予定部位を切断する方法が挙げられ、前記ｉ）の押圧手段としては例えば、ピン、パンチング等の押圧具、水流、エアーの吹き付けが挙げられる。例えば、第１不織布２１の製造方法が、公知のカード法によって繊維ウエブを形成し、該繊維ウエブに熱風を吹き付ける等の加熱処理を施してこれを不織布化する工程を有する場合、該加熱処理前の繊維ウエブに対して前記ｉ）を実施することによって開孔２４０を形成しても良く、あるいは該加熱処理後の繊維ウエブ即ち第１不織布２１に対して前記ｉｉ）を実施することによって開孔２４０を形成しても良い。 A preferred method for forming the opening 240 is a non-heating method that does not involve heating the top 24a. Specifically, for example, i) physically press the site where the opening 240 is to be formed to the site. Examples thereof include a method of forming an opening 240 by separating existing constituent fibers and a method of ii) cutting a portion to be formed of the opening 240. Examples of the pressing means of i) include a pressing tool such as a pin or a punch. , Water flow, air blowing. For example, when the method for producing the first non-woven fabric 21 includes a step of forming a fiber web by a known card method and performing a heat treatment such as blowing hot air on the fiber web to make the fiber web into a non-woven fabric, before the heat treatment. The opening 240 may be formed by carrying out the above i) on the fiber web of the above, or by carrying out the above ii) on the fiber web after the heat treatment, that is, the first non-woven fabric 21. 240 may be formed.

表面シート２の各部の繊維間距離は下記方法によって測定される。尚、凸部２４の一部（頂部２４ａ、中腹部２４ｂ、基端部２４ｃ）の繊維間距離を測定する場合は、当該一部について下記方法により繊維間距離を測定し、それらの平均値を当該一部の繊維間距離とする。また、繊維間距離の測定のために測定対象の不織布を切断する場合には、その切断による繊維間距離の変化を最小限に抑えるために、測定対象の不織布を予め液体窒素で凍結し、その凍結状態の不織布をカミソリの刃などを用いて切断する。 The interfiber distance of each part of the surface sheet 2 is measured by the following method. When measuring the interfiber distance of a part of the convex portion 24 (top 24a, middle abdomen 24b, base end 24c), the interfiber distance is measured for the part by the following method, and the average value thereof is calculated. The distance between the fibers of the part. When the non-woven fabric to be measured is cut for measuring the interfiber distance, the non-woven fabric to be measured is frozen in liquid nitrogen in advance in order to minimize the change in the interfiber distance due to the cutting. Cut the frozen non-woven fabric using a razor blade or the like.

＜繊維間距離の測定方法＞
繊維間距離の測定は、特開平５−２８５１７２号公報記載の「繊維空間径の測定」に準じ、以下に説明する手順で行った。表面シートの測定対象部位に存する構成繊維、即ち、頂部２４ａ（即ち開孔２４０及びその周辺部）のうち、開孔２４０を除いた開孔周囲部に存する構成繊維、並びに中腹部２４ｂ及び基端部２４ｃに存する構成繊維をそれぞれ試料とし、マイクロスコープ（株式会社キーエンス製ＶＨＸ−１０００）により、この試料の１００倍拡大画像を得、該拡大画像を基に、画像解析測定ソフト（Media Cybernetics社製Ｉｍａｇｅ−ＰｒｏＰｌｕｓ「ＴｈｅＰｒｏｖｅｎＳｏｌｕｔｉｏｎ」Ｖｅｒ．４．５．１２）により焦点が一致している繊維の外側を抽出し、そこに形成された面を繊維空間とする。前記拡大画像をスキャナー等で読み取り、繊維空間の占める面積を求めた。試料の任意の場所を５か所選択し、その選択した範囲における繊維空間１つ当たりの面積〔繊維空間面積（平均値）〕より、下記式（１）及び（２）によって繊維空間径（ｒ）を求め、該繊維空間径（ｒ）を繊維間距離とした。下記式中、Ａは繊維空間面積（平均値）、Ａｉは測定した繊維空間の面積、Ｎは測定した個数である。 <Measurement method of interfiber distance>
The measurement of the inter-fiber distance was carried out according to the “measurement of fiber space diameter” described in JP-A-5-285172, and the procedure described below was performed. Constituent fibers existing at the measurement target site of the surface sheet, that is, among the top 24a (that is, the opening 240 and its peripheral portion), the constituent fibers existing around the opening excluding the opening 240, and the middle abdomen 24b and the proximal end. Using the constituent fibers existing in part 24c as samples, a 100-fold magnified image of this sample was obtained with a microscope (VHX-1000 manufactured by Keyence Co., Ltd.), and based on the magnified image, image analysis measurement software (manufactured by Media Cybernetics) Image-Pro Plus "The Proven Solution" Ver. 4.5.12) is used to extract the outside of the fibers that are in focus, and the surface formed therein is used as the fiber space. The enlarged image was read with a scanner or the like to determine the area occupied by the fiber space. Five arbitrary locations of the sample are selected, and the fiber space diameter (r) is calculated from the area per fiber space [fiber space area (average value)] in the selected range according to the following equations (1) and (2). ) Was obtained, and the fiber space diameter (r) was defined as the interfiber distance. In the following formula, A is the fiber space area (average value), Ai is the measured fiber space area, and N is the measured number.

前述した凸部２４の各部（頂部２４ａ、中腹部２４ｂ、基端部２４ｃ）における構成繊維の繊維間距離の大小関係を満たす不織布は、公知の方法によって製造された凹凸不織布の凸部に、前述した非加熱法によって開孔を形成することによって得られる。開孔形成前の凹凸不織布は、該凹凸不織布が本実施形態の表面シート２の如き積層構造の場合は、例えば、エンボスによる圧縮加工を利用した立体賦形法、具体的には例えば、特開２０１５−１１２３４３号公報に記載の複合シートの製造方法によって製造可能であり、また、該凹凸不織布が後述する単層構造（図５参照）の場合は、例えば、特開２０１２−１４４８３５号公報に記載の不織布の製造方法によって製造可能である。 The non-woven fabric that satisfies the magnitude relationship of the interfiber distances of the constituent fibers in each part (top 24a, middle abdomen 24b, base end 24c) of the convex portion 24 described above is the convex portion of the uneven non-woven fabric produced by a known method. It is obtained by forming an opening by a non-heating method. When the concavo-convex non-woven fabric before forming the pores has a laminated structure such as the surface sheet 2 of the present embodiment, for example, a three-dimensional shaping method using compression processing by embossing, specifically, for example, Japanese Patent Application Laid-Open No. It can be manufactured by the method for manufacturing a composite sheet described in Japanese Patent Application Laid-Open No. 2015-112343, and when the uneven nonwoven fabric has a single-layer structure (see FIG. 5) described later, for example, it is described in JP-A-2012-144835. It can be manufactured by the method for manufacturing a non-woven fabric.

開孔２４０が形成された凸部２４において、頂部２４ａの繊維間距離Ｌａと中腹部２４ｂの繊維間距離Ｌｂとの比率は、Ｌａ／Ｌｂとして、好ましくは１．０以上、さらに好ましくは１．１以上、そして、好ましくは５．０以下、さらに好ましくは１．５以下である。
開孔２４０が形成された凸部２４において、頂部２４ａの繊維間距離Ｌａと基端部２４ｃの繊維間距離Ｌｃとの比率は、Ｌａ／Ｌｃとして、好ましくは１．０以上、さらに好ましくは１．２以上、そして、好ましくは１０以下、さらに好ましくは１．８以下である。
開孔２４０が形成された凸部２４において、中腹部２４ｂの繊維間距離Ｌｂと基端部２４ｃの繊維間距離Ｌｃとの比率は、Ｌｂ／Ｌｃとして、好ましくは１．０以上、さらに好ましくは１．１以上、そして、好ましくは８．０以下、さらに好ましくは１．５以下である。 In the convex portion 24 in which the opening 240 is formed, the ratio of the interfiber distance La of the top 24a to the interfiber distance Lb of the middle abdomen 24b is preferably 1.0 or more, more preferably 1. It is 1 or more, preferably 5.0 or less, and more preferably 1.5 or less.
In the convex portion 24 in which the opening 240 is formed, the ratio of the interfiber distance La of the top portion 24a to the interfiber distance Lc of the proximal end portion 24c is preferably 1.0 or more, more preferably 1 as La / Lc. It is .2 or more, preferably 10 or less, and more preferably 1.8 or less.
In the convex portion 24 in which the opening 240 is formed, the ratio of the interfiber distance Lb of the middle abdomen 24b to the interfiber distance Lc of the proximal end portion 24c is preferably 1.0 or more, more preferably 1.0 or more as Lb / Lc. It is 1.1 or more, preferably 8.0 or less, and more preferably 1.5 or less.

開孔２４０が形成された凸部２４において、頂部２４ａの繊維間距離Ｌａは５０μｍ以上、さらに好ましくは６０μｍ以上、そして、好ましくは１５０μｍ以下、さらに好ましくは１２０μｍ以下である。
開孔２４０が形成された凸部２４において、中腹部２４ｂの繊維間距離Ｌｂは、好ましくは３０μｍ以上、さらに好ましくは５０μｍ以上、そして、好ましくは１２０μｍ以下、さらに好ましくは１００μｍ以下である。
開孔２４０が形成された凸部２４において、基端部２４ｃの繊維間距離Ｌｃは、好ましくは１５μｍ以上、さらに好ましくは３０μｍ以上、そして、好ましくは９０μｍ以下、さらに好ましくは７０μｍ以下である。 In the convex portion 24 in which the opening 240 is formed, the interfiber distance La of the top portion 24a is 50 μm or more, more preferably 60 μm or more, and preferably 150 μm or less, further preferably 120 μm or less.
In the convex portion 24 in which the opening 240 is formed, the interfiber distance Lb of the middle abdomen 24b is preferably 30 μm or more, more preferably 50 μm or more, and preferably 120 μm or less, further preferably 100 μm or less.
In the convex portion 24 in which the opening 240 is formed, the interfiber distance Lc of the base end portion 24c is preferably 15 μm or more, more preferably 30 μm or more, and preferably 90 μm or less, further preferably 70 μm or less.

また、前述した凸部２４の特徴的な構成による作用効果をより確実に奏させるようにする観点から、表面シート２の各部の寸法等は次のように設定することが好ましい。
凸部２４の高さ２４Ｔ（図４参照）は、好ましくは０．８ｍｍ以上、さらに好ましくは１．４ｍｍ以上、そして、好ましくは１０ｍｍ以下、さらに好ましくは５．０ｍｍ以下である。
凸部２４の平面視における最大長さ２４Ｌ（図４参照）は、好ましくは１．５ｍｍ以上、さらに好ましくは２．０ｍｍ以上、そして、好ましくは１０ｍｍ以下、さらに好ましくは７．０ｍｍ以下である。
表面シート２の肌対向面２ａから縦５０ｍｍ、横５０ｍｍの平面視正方形形状の領域を任意に選択した場合、その任意領域に存する凸部２４の総数は、好ましくは９個以上、さらに好ましくは２５個以上、そして、好ましくは９００個以下、さらに好ましくは４００個以下である。 Further, from the viewpoint of more reliably achieving the action and effect due to the characteristic configuration of the convex portion 24 described above, it is preferable to set the dimensions and the like of each portion of the surface sheet 2 as follows.
The height 24T (see FIG. 4) of the convex portion 24 is preferably 0.8 mm or more, more preferably 1.4 mm or more, and preferably 10 mm or less, further preferably 5.0 mm or less.
The maximum length 24L (see FIG. 4) of the convex portion 24 in a plan view is preferably 1.5 mm or more, more preferably 2.0 mm or more, and preferably 10 mm or less, further preferably 7.0 mm or less.
When a square-shaped region having a length of 50 mm and a width of 50 mm is arbitrarily selected from the skin-facing surface 2a of the surface sheet 2, the total number of convex portions 24 existing in the arbitrary region is preferably 9 or more, more preferably 25. The number is more than 900, preferably 900 or less, and more preferably 400 or less.

表面シート２の形成材料について説明すると、表面シート２を構成する第１不織布２１及び第２不織布２２としては、それぞれ例えば、エアスルー不織布、スパンボンド不織布、スパンレース不織布、メルトブローン不織布、レジンボンド不織布、ニードルパンチ不織布等を用いることができる。これらのなかでも、エアスルー不織布は、肌触りとクッション感がその他製法の不織布と比較し良好であるため、本発明で好ましく用いられる。また、両不織布２１，２２の坪量は特に制限されないが、それぞれ、好ましくは８ｇ／ｍ²以上、さらに好ましくは１５ｇ／ｍ²以上、そして、好ましくは１００ｇ／ｍ²以下、さらに好ましくは７０ｇ／ｍ²以下である。 Explaining the material for forming the surface sheet 2, the first non-woven fabric 21 and the second non-woven fabric 22 constituting the surface sheet 2 include, for example, an air-through non-woven fabric, a spunbonded non-woven fabric, a spunlaced non-woven fabric, a melt-blown non-woven fabric, a resin-bonded non-woven fabric, and a needle. Punched non-woven fabric or the like can be used. Among these, the air-through non-woven fabric is preferably used in the present invention because it has a better feel and cushioning feeling as compared with the non-woven fabrics manufactured by other manufacturing methods. The basis weight of both non-woven fabrics 21 and 22 is not particularly limited, but is preferably 8 g / m ² or more, more preferably 15 g / m ² or more, and preferably 100 g / m ² or less, still more preferably 70 g / m, respectively. It is less than m ² .

両不織布２１，２２の構成繊維としては、各種の熱可塑性樹脂からなる繊維（熱融着繊維）を用いることができる。熱可塑性樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン；ポリエチレンテレフタレート等のポリエステル；ナイロン６、ナイロン６６等のポリアミド；ポリアクリル酸、ポリメタクリル酸アルキルエステル、ポリ塩化ビニル、ポリ塩化ビニリデン等が挙げられる。これらの樹脂は１種を単独で又は２種以上を組み合わせて用いることができる。熱融着性繊維は、短繊維でも長繊維でも良く、親水性でも撥水性でも良い。また、芯鞘型又はサイド・バイ・サイド型の複合繊維、分割繊維、異形断面繊維、熱収縮繊維等を用いることもできる。これらの繊維は、１種を単独で又は２種以上を組み合わせて用いることができる。また、両不織布２１，２２は、組成的に互いに同一であっても良く、異なっていても良い。ここで、組成的に同一とは、両者の形成材料及びその含有量が同一であることを意味し、各部の寸法、平面視形状等の外観的要素の異同は問わない。 As the constituent fibers of both non-woven fabrics 21 and 22, fibers made of various thermoplastic resins (heat-fused fibers) can be used. Examples of the thermoplastic resin include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides such as nylon 6 and nylon 66; polyacrylic acid, polymethacrylic acid alkyl ester, polyvinyl chloride, polyvinylidene chloride and the like. These resins may be used alone or in combination of two or more. The heat-sealing fibers may be short fibers or long fibers, and may be hydrophilic or water repellent. Further, core-sheath type or side-by-side type composite fibers, split fibers, deformed cross-section fibers, heat-shrinkable fibers and the like can also be used. These fibers may be used alone or in combination of two or more. Further, both non-woven fabrics 21 and 22 may be the same or different in composition from each other. Here, the compositionally the same means that the forming materials and the contents thereof are the same, and the difference in appearance elements such as the dimensions and the plan view shape of each part does not matter.

第１不織布２１と第２不織布２２との積層体２０を含んで構成されている表面シート２は、例えば特開２０１５−１１２３４３号公報に記載の複合シートの製造方法に準じて製造することができる。具体的には、例えば、帯状の第１不織布２１を、周面が互いに噛み合い形状となっている第１ロールと第２ロールとの間に供給して、第１不織布２１を凹凸形状に変形させた後、第１不織布２１を第１ロールの周面部に沿わせて噛み合い部分から移動させ、次いで、第２不織布２２を第１不織布２１に重ね合わせるように供給して両不織布２１，２２を、第１ロールにおける凸部とヒートロールとの間で加熱下に挟圧して接合部２３を形成し、両不織布２１，２２を接合一体化する。第１ロールと第２ロールとの噛み合い部に噛み込ませて第１不織布２１を凹凸形状に変形させる際には、第１不織布２１をロール内部方向に向けて吸引して、第１不織布２１の凹凸形状への変形を促進させることが好ましい。両不織布２１，２２はそれぞれ公知の不織布の製造方法に準じて製造することができる。 The surface sheet 2 including the laminate 20 of the first nonwoven fabric 21 and the second nonwoven fabric 22 can be produced, for example, according to the method for producing a composite sheet described in JP-A-2015-112343. .. Specifically, for example, a strip-shaped first nonwoven fabric 21 is supplied between the first roll and the second roll whose peripheral surfaces are in mesh with each other to deform the first nonwoven fabric 21 into an uneven shape. After that, the first non-woven fabric 21 is moved from the meshing portion along the peripheral surface portion of the first roll, and then the second non-woven fabric 22 is supplied so as to be overlapped with the first non-woven fabric 21 to supply both non-woven fabrics 21 and 22. A joint portion 23 is formed by sandwiching the convex portion and the heat roll in the first roll under heating, and both non-woven fabrics 21 and 22 are joined and integrated. When the first non-woven fabric 21 is deformed into a concavo-convex shape by engaging with the meshing portion between the first roll and the second roll, the first non-woven fabric 21 is sucked toward the inside of the roll to form the first non-woven fabric 21. It is preferable to promote the deformation into the uneven shape. Both non-woven fabrics 21 and 22 can be manufactured according to known non-woven fabric manufacturing methods.

図５には、本発明の不織布の他の実施形態である表面シート２５が示されている。図５に示す表面シート２５については、前述した表面シート２と異なる構成部分を主として説明し、同様の構成部分は同一の符号を付して説明を省略する。表面シート２５について特に説明しない構成部分は、表面シート２についての説明が適宜適用される。 FIG. 5 shows a surface sheet 25 which is another embodiment of the nonwoven fabric of the present invention. The surface sheet 25 shown in FIG. 5 will mainly be described with components different from those of the surface sheet 2 described above, and the same components will be designated by the same reference numerals and description thereof will be omitted. The description of the surface sheet 2 is appropriately applied to the components not particularly described with respect to the surface sheet 25.

図５に示す表面シート２５は単層構造であり、１枚の不織布から構成されており、特開２０１２−１４４８３５号公報に記載の不織布の製造方法に準じて製造することができる。具体的には、融着する前の繊維ウエブ（カードウエブ）を、所定の厚みとなるようカード機からウエブ賦形装置に供給する。ウエブ賦形装置では、まず温風の空気を供給して、該ウエブ賦形装置が有する台座における多数の突起の上に繊維ウエブを定着させる。次いで台座上の繊維ウエブに対して、熱風を、該繊維ウエブの各構成繊維が適度に融着可能な温度で吹きつけて、該台座上の突起に沿って繊維ウエブを賦形すると共に、各構成繊維を融着させることで表面シート２５を作製する。斯かる方法で作製された表面シート２５は、表面シート２（図２参照）における接合部２３の如き、複数の不織布どうしの接合部は有していない。表面シート２５における凸部２４の形成パターンは、表面シート２におけるものと同様であり、表面シート２５の肌対向面２ａには、複数の凸部２４それぞれの全周囲にわたって凹部（非凸部）２６が配されており、凹部２６は肌対向面２ａの全域にわたって連続している。また、表面シート２５の非肌対向面２ｂにおいては、凸部２４は形成されておらず、凸部２４に対応する部位が肌対向面２ａ側に突出して、凸部２４の中空部を形成している。尚、表面シート２５において、凸部２４や凹部２６の形成パターンは図示のものに限定されず、本発明の趣旨を逸脱しない範囲で任意のものを選択可能である。 The surface sheet 25 shown in FIG. 5 has a single-layer structure and is composed of one non-woven fabric, and can be manufactured according to the method for manufacturing a non-woven fabric described in JP2012-144835A. Specifically, the fiber web (card web) before fusion is supplied from the card machine to the web shaping device so as to have a predetermined thickness. In the web shaping device, first, warm air is supplied to fix the fiber web on a large number of protrusions on the pedestal of the web shaping device. Next, hot air is blown onto the fiber web on the pedestal at a temperature at which the constituent fibers of the fiber web can be appropriately fused to form the fiber web along the protrusions on the pedestal, and each of them is formed. The surface sheet 25 is produced by fusing the constituent fibers. The surface sheet 25 produced by such a method does not have a joint portion between a plurality of non-woven fabrics like the joint portion 23 in the surface sheet 2 (see FIG. 2). The formation pattern of the convex portion 24 on the surface sheet 25 is the same as that on the surface sheet 2, and the concave portion (non-convex portion) 26 on the skin facing surface 2a of the surface sheet 25 covers the entire circumference of each of the plurality of convex portions 24. 26 is arranged, and the recess 26 is continuous over the entire area of the skin facing surface 2a. Further, on the non-skin facing surface 2b of the surface sheet 25, the convex portion 24 is not formed, and the portion corresponding to the convex portion 24 projects toward the skin facing surface 2a side to form the hollow portion of the convex portion 24. ing. In the surface sheet 25, the formation pattern of the convex portion 24 and the concave portion 26 is not limited to the one shown in the drawing, and any one can be selected without departing from the spirit of the present invention.

以上、本発明について説明したが、本発明は前述した実施形態に制限されず、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、本発明の不織布においては、両面に凸部が形成されていても良い。尚、不織布の非肌対向面に凸部を形成する場合、該凸部の頂部には本発明に係る開孔、即ち、凸部を外力によって動きやすいものとし、不織布の肌触り及びクッション感を向上させ得る開孔を形成する必要はない。
また、おむつ１において、吸収性コア４０から着用者の肌側への排泄液の移行（いわゆる液戻り）を防止する目的で、表面シート２と吸収体４（コアラップシート４１）との間に、サブレイヤーなどとも呼ばれる液透過性の体液逆流防止層を介在配置しても良い。
また、本発明の吸収性物品は、前記実施形態の如き展開型の使い捨ておむつに制限されず、人体から排出される体液（尿、経血、軟便、汗等）の吸収に用いられる物品を広く包含し、パンツ型の使い捨ておむつ、生理用ナプキン、生理用ショーツ等も包含される。 Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit of the present invention. For example, in the nonwoven fabric of the present invention, convex portions may be formed on both sides. When a convex portion is formed on the non-skin facing surface of the non-woven fabric, the opening according to the present invention, that is, the convex portion is made easy to move by an external force at the top of the convex portion, and the feel and cushioning feeling of the non-woven fabric are improved. It is not necessary to form a possible opening.
Further, in the diaper 1, for the purpose of preventing the transfer of the excrement liquid from the absorbent core 40 to the wearer's skin side (so-called liquid return), between the surface sheet 2 and the absorbent body 4 (core wrap sheet 41). , A liquid-permeable body fluid backflow prevention layer, which is also called a sub-layer, may be interposed.
Further, the absorbent article of the present invention is not limited to the deployable disposable diaper as in the above embodiment, and a wide range of articles used for absorbing body fluids (urine, menstrual blood, loose stool, sweat, etc.) discharged from the human body. It also includes pants-type disposable diapers, sanitary napkins, sanitary shorts, and the like.

以下、本発明を実施例により更に具体的に説明するが、本発明は斯かる実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to such Examples.

〔実施例１〕
図３及び図４に示す表面シート２と同様の、第１不織布と第２不織布との積層体からなる不織布を製造し実施例１とした。実施例１の不織布における凸部及び接合部（凹部）の形成パターンは、特許文献２に記載の複合シートに類似しており、具体的には、凸部は全体として稜線が丸みを帯びた扁平な直方体又は截頭四角錐体をなし、凸部及び接合部（凹部）共に平面視矩形をなし、また、凸部及び接合部（凹部）共に千鳥配置されている。
第１不織布として、熱融着性の複合繊維を原料として、カード法によって坪量１８ｇ／ｍ²のカードウェブを製造した。カードウェブに、特許文献１に記載の複数の突起を有する支持体を押し当てることで、規則的に配列した開孔を形成し、エアスルー方式の熱風処理に供して、複合繊維どうしの交点を熱融着させ、規則的な開孔を形成した第１不織布を製造した。原料の複合繊維は、ポリエチレンテレフタレート（ＰＥＴ）を芯成分、ポリエチレン（ＰＥ）を鞘成分とする芯鞘型複合繊維であり、繊度は２．３ｄｔｅｘの繊維を使用した。
第２不織布として、凸部に開孔を有していない以外は第１不織布と同じ構成の凹凸不織布を用いた。
第１不織布と第２不織布とを用い、特許文献２記載の複合シートの製造方法に準じて両不織布をエンボス加工により接合一体化して、実施例１の表面シートを製造した。尚、第１不織布の開孔が、凸部の頂点に位置するようエンボス加工のピッチを調整した。 [Example 1]
A non-woven fabric made of a laminate of the first non-woven fabric and the second non-woven fabric similar to the surface sheet 2 shown in FIGS. 3 and 4 was produced and used as Example 1. The formation pattern of the convex portion and the joint portion (concave portion) in the non-woven fabric of Example 1 is similar to the composite sheet described in Patent Document 2. Specifically, the convex portion is flat with a rounded ridge line as a whole. It forms a rectangular parallelepiped or a quadrangular pyramid, and both the convex portion and the joint (concave) form a rectangular shape in a plan view, and both the convex and the joint (concave) are staggered.
As the first non-woven fabric, a card web having a basis weight of 18 g / m ² was produced by a card method using a heat-sealing composite fiber as a raw material. By pressing a support having a plurality of protrusions described in Patent Document 1 against the card web, regularly arranged openings are formed and subjected to hot air treatment by an air-through method to heat the intersections of the composite fibers. A first non-woven fabric was produced which was fused to form regular openings. The raw material composite fiber was a core-sheath type composite fiber containing polyethylene terephthalate (PET) as a core component and polyethylene (PE) as a sheath component, and a fiber having a fineness of 2.3 dtex was used.
As the second non-woven fabric, a non-woven fabric having the same structure as that of the first non-woven fabric was used except that the convex portion did not have a hole.
Using the first non-woven fabric and the second non-woven fabric, both non-woven fabrics were joined and integrated by embossing according to the method for manufacturing a composite sheet described in Patent Document 2, and the surface sheet of Example 1 was manufactured. The embossing pitch was adjusted so that the openings of the first non-woven fabric were located at the apex of the convex portion.

〔実施例２〕
図５に示す表面シート２５と同様の単層構造の不織布を製造し実施例２とした。具体的には、熱融着性の複合繊維を用いて、特開２０１２−１４４８３５号公報に記載の不織布の製造方法に準じて製造した。 [Example 2]
A non-woven fabric having a single-layer structure similar to that of the surface sheet 25 shown in FIG. 5 was produced and used as Example 2. Specifically, it was produced by using a heat-sealing composite fiber according to the method for producing a non-woven fabric described in Japanese Patent Application Laid-Open No. 2012-144835.

〔比較例１〕
第１不織布の凸部に開孔を形成しなかった以外は、実施例１と同様にして二層構造の不織布を製造し比較例１とした。 [Comparative Example 1]
A non-woven fabric having a two-layer structure was produced in the same manner as in Example 1 except that no holes were formed in the convex portion of the first non-woven fabric, and used as Comparative Example 1.

〔比較例２〕
第１不織布の凸部に開孔を形成する方法として、熱エンボスによる溶融開孔を採用した以外は、実施例１と同様にして二層構造の不織布を製造し比較例２とした。 [Comparative Example 2]
A non-woven fabric having a two-layer structure was produced in the same manner as in Example 1 except that melt-opening by thermal embossing was adopted as a method for forming openings in the convex portions of the first nonwoven fabric, and used as Comparative Example 2.

〔比較例３〕
第１不織布の凸部に開孔を形成しなかった以外は、実施例２と同様にして単層構造の不織布を製造し比較例３とした。 [Comparative Example 3]
A non-woven fabric having a single-layer structure was produced in the same manner as in Example 2 except that no holes were formed in the convex portion of the first non-woven fabric, and used as Comparative Example 3.

〔評価試験〕
各実施例及び比較例の不織布について、前記方法により凸部の各部における構成繊維の繊維間距離を測定すると共に、３名のパネラー（成人男女）に該不織布における凸部形成面の肌触りを評価してもらった。斯かる肌触りの評価は、６点満点（最高評価は６点、最低評価は１点）とし、且つ、二層構造の不織布については比較例１を、単層構造の不織布については比較例３をそれぞれ基準（基準の不織布の評価点は３点）として行った。その結果（肌触りについては３名のパネラーの平均点）を下記表１に示す。〔Evaluation test〕
For the non-woven fabrics of each Example and Comparative Example, the interfiber distances of the constituent fibers in each part of the convex portion were measured by the above method, and three panelists (adult men and women) evaluated the texture of the convex portion forming surface in the non-woven fabric. I got it. The evaluation of such touch is given a maximum of 6 points (the highest evaluation is 6 points, the lowest evaluation is 1 point), and Comparative Example 1 is given for a two-layer structure non-woven fabric, and Comparative Example 3 is given for a single-layer structure non-woven fabric. Each was performed as a standard (the evaluation score of the standard non-woven fabric was 3 points). The results (the average score of the three panelists for the touch) are shown in Table 1 below.

１使い捨ておむつ（吸収性物品）
１Ｆ腹側部
１Ｍ股下部
１Ｒ背側部
２，２５表面シート（不織布）
２０積層体
２１第１不織布
２２第２不織布
２３接合部
２４凸部
２４ａ凸部の頂部
２４ｂ凸部の中腹部
２４ｃ凸部の基端部
２４０開孔
３裏面シート
４吸収体
４０吸収性コア
４１コアラップシート
５サイドシート
６ファスニングテープ
７被止着領域
Ｘ縦方向
Ｙ横方向 1 Disposable diapers (absorbent articles)
1F ventral 1M crotch 1R dorsal 2,25 surface sheet (nonwoven fabric)
20 Laminated body 21 1st non-woven fabric 22 2nd non-woven fabric 23 Joint part 24 Convex part 24a Convex part top 24b Convex part middle abdomen 24c Convex part base end part 240 Opening 3 Back side sheet 4 Absorber 40 Absorbent core 41 Core Wrap sheet 5 Side sheet 6 Fastening tape 7 Adhesion area X Vertical direction Y Horizontal direction

Claims

A plurality of hollow convex portions are scattered on one surface, and openings communicating inside and outside the convex portions are formed at the tops of at least a part of the plurality of convex portions.
The top portion is a portion located at the uppermost portion when the convex portion is divided into three equal parts in the height direction.
In the convex portion where the opening is formed, among the constituent fibers existing at the top, the distance between the fibers in the peripheral portion of the opening excluding the opening is between the fibers of the constituent fibers existing in a portion other than the top. der more distance is,
The perimeter of the hole is a non-woven fabric having no portion extending in the height direction of the convex portion .

A plurality of hollow convex portions are scattered on one surface, and openings communicating inside and outside the convex portions are formed at the tops of at least a part of the plurality of convex portions.
The top portion is a portion located at the uppermost portion when the convex portion is divided into three equal parts in the height direction.
In the convex portion where the opening is formed, among the constituent fibers existing at the top, the distance between the fibers in the peripheral portion of the opening excluding the opening is between the fibers of the constituent fibers existing in a portion other than the top. More than a distance,
Distance between fibers of the constituent fibers in said aperture said convex portion formed in the top is the longest, gradual short and that nonwoven fabric as the distance from the open hole in the height direction of the convex portion.

A plurality of hollow convex portions are scattered on one surface, and openings communicating inside and outside the convex portions are formed at the tops of at least a part of the plurality of convex portions.
The top portion is a portion located at the uppermost portion when the convex portion is divided into three equal parts in the height direction.
In the convex portion where the opening is formed, among the constituent fibers existing at the top, the distance between the fibers in the peripheral portion of the opening excluding the opening is between the fibers of the constituent fibers existing in a portion other than the top. More than a distance,
The convex portion, out of the constituent fibers existing on at least the top, the opening excluding the opening periphery of the constituent fibers have a have a fused portion in the nonwoven fabric.

It is composed of a laminate of a first non-woven fabric and a second non-woven fabric.
Claim that the convex portion is formed on the first non-woven fabric and not on the second non-woven fabric, and the second non-woven fabric is bonded to the first non-woven fabric at a portion other than the convex portion. The non-woven fabric according to any one of 1 to 3 .

The non-woven fabric according to claim 4 , wherein the second non-woven fabric is not formed with through holes penetrating the second non-woven fabric in the thickness direction.

An absorbent article comprising an absorber and a surface sheet arranged on the skin-facing surface side of the absorber, wherein the surface sheet is the non-woven fabric according to any one of claims 1 to 5. Goods.