JP6802044B2 - Pants type disposable diaper - Google Patents

Pants type disposable diaper Download PDF

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JP6802044B2
JP6802044B2 JP2016223126A JP2016223126A JP6802044B2 JP 6802044 B2 JP6802044 B2 JP 6802044B2 JP 2016223126 A JP2016223126 A JP 2016223126A JP 2016223126 A JP2016223126 A JP 2016223126A JP 6802044 B2 JP6802044 B2 JP 6802044B2
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elastic member
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ventral
dorsal
leg elastic
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JP2018079058A (en
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光佑 有田
光佑 有田
了一 山本
了一 山本
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Kao Corp
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Kao Corp
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Description

本発明は、パンツ型使い捨ておむつに関する。 The present invention relates to a pants-type disposable diaper.

従来、着用者の腹側に配される腹側領域、着用者の股間部に配される股下領域及び着用者の背側に配される背側領域に亘る砂時計状の外装体と、該外装体の内面側に固定された吸収性本体とを備え、腹側部における外装体の両側縁部と背側部における外装体の両側縁部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつが知られている。 Conventionally, an hourglass-shaped exterior body extending over the ventral region arranged on the ventral side of the wearer, the inseam region arranged on the crotch portion of the wearer, and the dorsal region arranged on the dorsal side of the wearer, and the exterior. It is equipped with an absorbent body fixed to the inner surface side of the body, and both side edges of the exterior body on the ventral side and both side edges of the exterior body on the dorsal side are joined to form a pair of side seals and a waist opening. Pants-type disposable diapers are known in which a portion and a pair of leg openings are formed.

このようなパンツ型使い捨ておむつにおいては、外装体の腹側領域、背側領域及び股下領域に弾性部材を伸長状態で固定してギャザーを形成し、身体へのフィット性を向上させている。例えば、一対のレッグ開口部の各開口周縁部に沿って各レッグ弾性部材を配し、該レッグ弾性部材を伸長状態で固定することで一対のレッグギャザーを形成して着両者の脚回りのフィット性を向上させている（例えば、特許文献１参照）。 In such a pants-type disposable diaper, elastic members are fixed in an extended state to the ventral region, the dorsal region, and the inseam region of the exterior body to form gathers, and the fit to the body is improved. For example, each leg elastic member is arranged along the peripheral edge of each opening of the pair of leg openings, and the leg elastic member is fixed in an extended state to form a pair of leg gathers to fit the legs of both wearers. The property is improved (see, for example, Patent Document 1).

特開２０１０−１９４２５７号公報JP-A-2010-194257

しかし、特許文献１に記載のパンツ型使い捨ておむつは、一対のレッグ開口部の各開口周縁部に沿って各レッグ弾性部材を配することから、該レッグ弾性部材の縦方向の収縮力により、股下部に配される吸収体に横方向の皺が発生してしまう。吸収体に横方向の皺が発生すると、吸収体の厚みや吸収体に触れたときの硬さを増加させたり、外観の悪化等を引き起こしたりしてしまう。 However, in the pants-type disposable diaper described in Patent Document 1, since each leg elastic member is arranged along each opening peripheral edge of the pair of leg openings, the inseam is caused by the vertical contraction force of the leg elastic member. Lateral wrinkles occur in the absorber arranged in the part. When lateral wrinkles occur in the absorber, the thickness of the absorber and the hardness when it comes into contact with the absorber are increased, and the appearance is deteriorated.

したがって本発明の課題は、前述した従来技術が有する欠点を解消し得るパンツ型使い捨ておむつを提供することにある。 Therefore, an object of the present invention is to provide a pants-type disposable diaper that can eliminate the drawbacks of the above-mentioned prior art.

本発明は、着用者の前後方向に相当する縦方向とこれに直交する横方向とを有し、該着用者の腹側に配される腹側領域、股間部に配される股下領域及び背側に配される背側領域に亘る外装体と、該外装体の肌対向面側に固定された吸収体を有する吸収性本体とを備え、前記腹側領域における前記外装体の両側縁部と前記背側領域における前記外装体の両側縁部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、前記一対のレッグ開口部それぞれの開口周縁部に沿って配された腹側レッグ弾性部材及び背側レッグ弾性部材により一対のレッグギャザーが形成されており、前記パンツ型使い捨ておむつの展開且つ伸長状態において、前記腹側レッグ弾性部材は、前記外装体における前記腹側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の縦方向の中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記腹側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、前記背側レッグ弾性部材は、前記外装体における前記背側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の前記中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記背側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、前記腹側レッグ弾性部材と前記背側レッグ弾性部材とは、前記股下領域の前記中央部において、前記使い捨ておむつを縦方向に二分する横方向に延びる横中心線から前記腹側領域側で交差しており、交差している部分から横方向の内方で接着剤により前記外装体に固定されており、前記股下領域の前記中央部において、前記背側レッグ弾性部材と前記吸収体の縦方向に沿う両側縁それぞれとのなす角が、３０度以上９０度以下である、パンツ型使い捨ておむつを提供するものである。 The present invention has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and is arranged on the ventral side of the wearer, the inseam region and the back. An exterior body extending to the dorsal region arranged on the side and an absorbent main body having an absorber fixed to the skin facing surface side of the exterior body are provided, and both side edges of the exterior body in the ventral region are provided. A pants-type disposable diaper in which both side edges of the exterior body in the dorsal region are joined to form a pair of side seals, a waist opening and a pair of leg openings, wherein the pair of legs A pair of leg gathers are formed by the ventral leg elastic member and the dorsal leg elastic member arranged along the peripheral edge of each opening, and the ventral side is formed in the deployed and extended state of the pants-type disposable diaper. The leg elastic member is arranged in an extended state from the ventral region side of the exterior body along one of the leg openings and extends laterally inward at the vertical central portion of the inseam region. Distributing in a state, further extending from the ventral region side of the exterior body along the other leg opening and extending laterally inward at the central portion of the inseam region. The dorsal leg elastic member is arranged in an extended state from the dorsal region side of the exterior body along one of the leg openings and laterally at the central portion of the inseam region. Arranged in an elongated state inward in the direction, further arranged in an extended state from the dorsal region side of the exterior body along the other leg opening, and laterally at the central portion of the inseam region. The ventral leg elastic member and the dorsal leg elastic member are arranged in an elongated state inward in the direction, and the disposable diaper is laterally divided into two in the vertical direction in the central portion of the inseam region. It intersects the ventral region side from the lateral center line extending in the direction, and is fixed to the exterior body by an adhesive in the lateral direction from the intersecting portion, and in the central portion of the inseam region. The present invention provides a pants-type disposable diaper in which the angle formed by the back leg elastic member and both side edges of the absorber along the vertical direction is 30 degrees or more and 90 degrees or less.

本発明のパンツ型使い捨ておむつによれば、股下領域に配された吸収体上に皺を発生し難くすると共に、良好なフィット性を維持することができる。 According to the pants-type disposable diaper of the present invention, wrinkles are less likely to occur on the absorber arranged in the inseam region, and good fit can be maintained.

図１は、本発明の好ましい一実施形態である使い捨ておむつを示す斜視図である。FIG. 1 is a perspective view showing a disposable diaper which is a preferred embodiment of the present invention. 図２は、図１に示す使い捨ておむつの展開且つ伸長状態を肌対向面側から視た平面図である。FIG. 2 is a plan view of the unfolded and stretched state of the disposable diaper shown in FIG. 1 as viewed from the skin-facing surface side. 図３（ａ）は、背側レッグ弾性部材と吸収体の縦方向に沿う側縁とのなす角度を示す図であり、図３（ｂ）は、腹側レッグ弾性部材と吸収体の縦方向に沿う側縁とのなす角度を示す図である。FIG. 3A is a diagram showing the angle formed by the dorsal leg elastic member and the side edge along the vertical direction of the absorber, and FIG. 3B is a diagram showing the vertical direction of the ventral leg elastic member and the absorber. It is a figure which shows the angle formed with the side edge along. 図４は、図２のＩＶ−ＩＶ線断面図である。FIG. 4 is a sectional view taken along line IV-IV of FIG.

以下、本発明のパンツ型使い捨ておむつを、その好ましい実施形態に基づき図面を参照しながら説明する。
本発明の一実施形態であるパンツ型使い捨ておむつ１（以下、おむつ１ともいう）は、図１及び図２に示すように、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とを有し、該着用者の腹側に配される腹側領域Ａ、股間部に配される股下領域Ｃ及び背側に配される背側領域Ｂに亘る外装体１０と、該外装体１０の肌対向面側に固定された吸収体４を有する吸収性本体５とを備えている。またおむつ１には、腹側領域Ａにおける外装体１０の両側縁部ＡＳ，ＡＳと背側領域Ｂにおける外装体１０の両側縁部ＢＳ，ＢＳとが接合されて、一対のサイドシール部Ｓ，Ｓ、ウエスト開口部７及び一対のレッグ開口部８，８が形成されている。 Hereinafter, the pants-type disposable diaper of the present invention will be described based on its preferred embodiment with reference to the drawings.
As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 (hereinafter, also referred to as diaper 1) according to an embodiment of the present invention has a vertical direction X corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction X. An exterior body 10 having a direction Y and extending to the ventral region A arranged on the ventral side of the wearer, the inseam region C arranged on the crotch portion, and the dorsal region B arranged on the dorsal side, and the said. It includes an absorbent body 5 having an absorber 4 fixed to the skin-facing surface side of the exterior body 10. Further, in the diaper 1, both side edge portions AS and AS of the exterior body 10 in the ventral region A and both side edge portions BS and BS of the exterior body 10 in the dorsal region B are joined to form a pair of side seal portions S. S, a waist opening 7 and a pair of leg openings 8 and 8 are formed.

おむつ１の縦方向（図２中Ｘ方向）は、図１及び図２に示すように、腹側領域Ａから股下領域Ｃを経て背側領域Ｂに亘る方向又はその逆方向であり、おむつ１の横方向（図２中Ｙ方向）は、一方のサイドシール部Ｓから他方のサイドシール部Ｓに亘る方向又はその逆方向である。またおむつ１の腹側領域Ａ及び背側領域Ｂは、図１及び図２に示すように、該おむつ１の横方向（図２中Ｙ方向）の両端に一対のサイドシール部Ｓ，Ｓを有する部分であり、股下領域Ｃは、おむつ１の展開且つ伸長状態において、腹側領域Ａと背側領域Ｂとの間に位置する部分である。更に本明細書において「おむつ１の展開且つ伸長状態」とは、おむつ１をサイドシール部Ｓで切り離して展開状態とし、その展開状態のおむつ１を各部の弾性部材を伸長させて設計寸法（弾性部材の影響を一切排除した状態で平面状に拡げたときの寸法と同じ）となるまで拡げた状態をいう。 As shown in FIGS. 1 and 2, the vertical direction of the diaper 1 (X direction in FIG. 2) is a direction extending from the ventral region A through the inseam region C to the dorsal region B or vice versa, and the diaper 1 The lateral direction (Y direction in FIG. 2) is the direction extending from one side seal portion S to the other side seal portion S or vice versa. Further, in the ventral region A and the dorsal region B of the diaper 1, as shown in FIGS. 1 and 2, a pair of side seal portions S and S are provided at both ends of the diaper 1 in the lateral direction (Y direction in FIG. 2). The inseam region C is a portion that is located between the ventral region A and the dorsal region B in the deployed and extended state of the diaper 1. Further, in the present specification, "the unfolded and stretched state of the diaper 1" means that the diaper 1 is separated by the side seal portion S to be in the unfolded state, and the diaper 1 in the unfolded state is stretched with the elastic members of each part to design dimensions (elasticity). It refers to the state in which it is expanded to the same size as when it is expanded in a plane with the influence of the members completely eliminated).

外装体１０は、おむつ１では、図１及び図２に示すように、おむつ１の最外表面となる外層シート１１と、外層シート１１の内面側に配されている内層シート１２と、これら両シート間１１，１２に伸長状態で固定された弾性部材とを備えている。外装体１０は、吸収性本体５の外方全域に亘って延出しており、縦方向Ｘに沿う両側縁に、縦方向Ｘの中央部において横方向Ｙの内方に括れた括れ部１０ｄ，１０ｄを有している。これら括れ部１０ｄ，１０ｄは、外装体１０の腹側領域Ａの両側縁部ＡＳ，ＡＳと背側領域Ｂの両側縁部ＢＳ，ＢＳとを互いに重ね合わせて接合した際に、一対のレッグ開口部８，８となる部分である。弾性部材は、伸長状態で外装体１０に固定されることでギャザーを形成する。尚、外装体１０の備える弾性部材については後に詳述する。 In the diaper 1, as shown in FIGS. 1 and 2, the exterior body 10 includes an outer layer sheet 11 which is the outermost surface of the diaper 1 and an inner layer sheet 12 arranged on the inner surface side of the outer layer sheet 11. An elastic member fixed in an extended state is provided between the sheets 11 and 12. The exterior body 10 extends over the entire outer surface of the absorbent body 5, and is constricted inward in the horizontal direction Y at the central portion of the vertical direction X on both side edges along the vertical direction X. It has 10d. These constricted portions 10d and 10d have a pair of leg openings when the bilateral edge portions AS and AS of the ventral region A of the exterior body 10 and the bilateral edge portions BS and BS of the dorsal region B are overlapped and joined to each other. It is a part that becomes parts 8 and 8. The elastic member forms gathers by being fixed to the exterior body 10 in an extended state. The elastic member included in the exterior body 10 will be described in detail later.

吸収性本体５は、おむつ１では、図２に示すように、液透過性の表面シート２と、液不透過性又は撥水性の裏面シート３と、これらの間に配された縦長の吸収体４とを備えている。吸収体４は、縦方向Ｘに長い吸収性コア４０をコアラップシート４５で被覆して構成されている。 In the diaper 1, the absorbent body 5 is a liquid-permeable front sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a vertically long absorbent body arranged between them, as shown in FIG. It is equipped with 4. The absorber 4 is configured by coating an absorbent core 40 long in the vertical direction X with a core wrap sheet 45.

吸収性コア４０は、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、股下領域Ｃにおける横方向Ｙの中央部に縦方向Ｘに延在する高坪量部４１と、該高坪量部４１の縦方向Ｘに沿う両側の外方に配され該高坪量部４１よりも低坪量の一対の低坪量部４２，４２とを有している。また吸収性コア４０は、図４に示すように、上部吸収層４１１と、上部吸収層４１１よりも縦方向Ｘ及び横方向Ｙの長さが長い下部吸収層４１２とを有する２層構造に形成されている。吸収性コア４０では、下部吸収層４１２の肌対向面上に上部吸収層４１１が積層されて下部吸収層４１２及び上部吸収層４１１が重なる部分が高坪量部４１であり、下部吸収層４１２の肌対向面上に上部吸収層４１１が積層されておらず下部吸収層４１２のみの部分が低坪量部４２となっている。 In the diaper 1, the absorbent core 40 has a high basis weight portion 41 extending in the vertical direction X in the central portion of the horizontal direction Y in the inseam region C in the expanded and extended state of the diaper 1 shown in FIG. It has a pair of low basis weight portions 42, 42 having a basis weight lower than that of the high basis weight portion 41, which are arranged on both sides of the basis weight portion 41 along the vertical direction X. Further, as shown in FIG. 4, the absorbent core 40 is formed into a two-layer structure having an upper absorbing layer 411 and a lower absorbing layer 412 having a length X in the vertical direction and Y in the horizontal direction longer than the upper absorbing layer 411. Has been done. In the absorbent core 40, the portion where the upper absorbing layer 411 is laminated on the skin facing surface of the lower absorbing layer 412 and the lower absorbing layer 412 and the upper absorbing layer 411 overlap is the high basis weight portion 41, and the lower absorbing layer 412 The upper absorption layer 411 is not laminated on the surface facing the skin, and only the lower absorption layer 412 is the low basis weight portion 42.

上部吸収層４１１は、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、おむつ１の股下領域Ｃから腹側領域Ａに亘って配されており、背側領域Ｂには配されていない。上部吸収層４１１は、股下領域Ｃの縦方向Ｘの中央部付近から腹側領域Ａに向かって幅が増大（漸増）しており、股下領域Ｃよりも腹側領域Ａ側の方が幅広の平面視略Ｔ字状に形成されている。上部吸収層４１１の腹側領域Ａ側の先端部は、腹側領域Ａにおける後述する胴回り部Ｄまで延出している。下部吸収層４１２は、腹側領域Ａから股下領域Ｃを通って背側領域Ｂに亘って配されており、縦方向Ｘに長い矩形状に形成されている。下部吸収層４１２は、縦方向Ｘの両端部それぞれが腹側領域Ａ及び背側領域Ｂそれぞれの後述する胴回り部Ｄ間に亘っている。 In the diaper 1, the upper absorption layer 411 is arranged from the inseam region C of the diaper 1 to the ventral region A in the expanded and extended state of the diaper 1 shown in FIG. 2, and is arranged in the dorsal region B. Not. The width of the upper absorption layer 411 increases (gradually increases) from the vicinity of the central portion of the inseam region C in the vertical direction X toward the ventral region A, and is wider on the ventral region A side than on the inseam region C. It is formed in a substantially T-shape in plan view. The tip of the upper absorption layer 411 on the ventral region A side extends to the waist circumference portion D described later in the ventral region A. The lower absorption layer 412 is arranged from the ventral region A through the inseam region C to the dorsal region B, and is formed in a rectangular shape long in the vertical direction X. The lower absorption layer 412 extends between both ends of the vertical direction X between the ventral region A and the dorsal region B, which will be described later.

下部吸収層４１２は、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、該下部吸収層４１２を貫通する側部非積繊部４４を有している。側部非積繊部４４は、下部吸収層４１２の横方向Ｙにおける両側部それぞれに形成されている。言い換えれば、側部非積繊部４４は、下部吸収層４１２の縦方向Ｘに沿う両側部それぞれに形成されている。即ち、おむつ１では、下部吸収層４１２に一対の側部非積繊部が形成されている。一対の側部非積繊部４４，４４は、下部吸収層４１２の肌対向面上に上部吸収層４１１が積層されておらず下部吸収層４１２のみの部分に形成されている。詳述すると、一対の側部非積繊部４４，４４は、上部吸収層４１１の縦方向Ｘに沿う両側縁に沿って該両側縁から横方向の外方の下部吸収層４１２に縦方向Ｘに延びて形成されている。下部吸収層４１２に一対の側部非積繊部４４，４４を設けることで、横方向Ｙの外方から内方に向かって股下領域Ｃに応力が発生した場合に、下部吸収層４１２の縦方向Ｘに沿う両側部の屈曲性を高めることができる。 In the diaper 1, the lower absorption layer 412 has a side non-stacked fiber portion 44 penetrating the lower absorption layer 412 in the expanded and extended state of the diaper 1 shown in FIG. The side non-stacked fiber portions 44 are formed on both side portions of the lower absorption layer 412 in the lateral direction Y. In other words, the side non-stacked fiber portions 44 are formed on both side portions of the lower absorption layer 412 along the vertical direction X. That is, in the diaper 1, a pair of side non-stacked portions are formed in the lower absorption layer 412. The pair of side non-stacked fiber portions 44, 44 are formed only in the lower absorption layer 412 without the upper absorption layer 411 being laminated on the skin facing surface of the lower absorption layer 412. More specifically, the pair of side non-stacked portions 44, 44 are vertically X from both side edges to the lateral outer lower absorption layer 412 along both side edges of the upper absorption layer 411 along the longitudinal direction X. It is formed by extending to. By providing the lower absorption layer 412 with a pair of side non-stacked fibers 44, 44, when stress is generated in the inseam region C from the outside to the inside in the lateral direction Y, the vertical direction of the lower absorption layer 412 The flexibility of both sides along the direction X can be increased.

また一対の側部非積繊部４４，４４は、図２に示すおむつ１の展開且つ伸長状態において、腹側領域Ａ側の一対のサイドシール部Ｓ，Ｓの股下領域Ｃ側の内方端Ｓａ，Ｓａどうしを結んだ仮想腹側内方線Ｙａと、背側領域Ｂ側の一対のサイドシール部Ｓ，Ｓの股下領域Ｃ側の内方端Ｓｂ，Ｓｂどうしを結んだ仮想背側内方線Ｙｂとの間で縦方向Ｘに延びて配されている。一対の側部非積繊部４４，４４は、おむつ１を横方向Ｙに二分する縦方向Ｘに延びる縦中心線Ｘｃに対して線対称に配されており、おむつ１の展開且つ伸長状態において、おむつ１の縦方向Ｘの略中央部に後述する横中心線Ｙｃに跨って設けられることが好ましい。 Further, the pair of side non-stacked fibers 44, 44 are the inner ends of the pair of side seal portions S, S on the ventral region A side on the inseam region C side in the expanded and extended state of the diaper 1 shown in FIG. The virtual ventral inner line Ya connecting Sa and Sa and the virtual dorsal side connecting the inner ends Sb and Sb of the pair of side seal portions S and S on the dorsal region B side on the inseam region C side. It is arranged so as to extend in the vertical direction X with the direction line Yb. The pair of side non-stacked fibers 44, 44 are arranged line-symmetrically with respect to the vertical center line Xc extending in the vertical direction X that divides the diaper 1 into two in the horizontal direction Y, and in the expanded and extended state of the diaper 1. , It is preferable that the diaper 1 is provided at a substantially central portion in the vertical direction X so as to straddle the horizontal center line Yc described later.

尚、吸収性コア４０の横方向Ｙの屈曲性を高める観点から、一対の側部非積繊部４４，４４は、おむつ１では、図４に示すように、吸収性コア４０を厚さ方向に貫通しており、吸収性コア４０を形成する材料（コア形成材料）が存在しない部分としたが、例えば、低坪量部４２より少ない量のコア形成材料が２０ｇ／ｍ2程度に若干存在している場合も、同様な効果を奏しうることから非積繊部に含めることができる。但し、該側部非積繊部に存するコア形成材料の坪量は５０ｇ／ｍ2以下であることが好ましい。 From the viewpoint of increasing the flexibility of the absorbent core 40 in the lateral direction Y, the pair of side non-stacked fiber portions 44, 44 in the diaper 1 have the absorbent core 40 in the thickness direction as shown in FIG. There is no material (core forming material) that forms the absorbent core 40, but for example, there is a small amount of core forming material at about 20 g / m 2 that is smaller than the low basis weight portion 42. Even if it is, it can be included in the non-stacked fiber portion because the same effect can be obtained. However, the basis weight of the core forming material existing in the side non-stacked fiber portion is preferably 50 g / m 2 or less.

吸収性コア４０は、おむつ１では、図４に示すように、上部吸収層４１１及び下部吸収層４１２の全体がコアラップシート４５で被覆されている。コアラップシート４５としては、各種公知のものを用いることができ、例えばティッシュペーパのような薄紙や透水性の不織布等が好ましく用いられる。吸収性コア４０は、上部吸収層４１１と下部吸収層４１２とを、それぞれ別々にコアラップシート４５で被覆した後、両者を積層したものであっても良い。この場合、上部吸収層４１１を被覆するコアラップシート４５と下部吸収層４１２を被覆するコアラップシート４５との間は接着しても接着しなくても良い。 As shown in FIG. 4, in the diaper 1, the absorbent core 40 is entirely covered with the core wrap sheet 45 of the upper absorbent layer 411 and the lower absorbent layer 412. As the core wrap sheet 45, various known materials can be used, and for example, a thin paper such as tissue paper or a water-permeable non-woven fabric is preferably used. The absorbent core 40 may be formed by coating the upper absorbing layer 411 and the lower absorbing layer 412 separately with the core wrap sheet 45, and then laminating the two. In this case, the core wrap sheet 45 that covers the upper absorption layer 411 and the core wrap sheet 45 that covers the lower absorption layer 412 may or may not be bonded.

吸収性本体５の両側には、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、一対の防漏カフ５５，５５が形成されている。各防漏カフ５５は、吸収性本体５に接合された防漏カフ形成用シート５６、該防漏カフ形成用シート５６の自由端近傍に伸長状態で固定された防漏カフ形成用の弾性部材５７、及び各防漏カフ５５の固定端と自由端との間に伸長状態で固定された防漏カフ中間弾性部材５８を備えている。図４に示す例では、防漏カフ形成用シート５６として、所定幅の帯状の撥水性シートの１枚を、その長手方向に沿って二つ折りして、相対向する層間をホットメルト型接着剤又は部分的な熱シール若しくは超音波シール等で接合した２層構造のシートを用いている。前述した弾性部材５７及び防漏カフ中間弾性部材５８は、この２層構造シートの層間に伸長状態で固定されている。 On both sides of the absorbent body 5, a pair of leakage-proof cuffs 55 and 55 are formed in the diaper 1 in the unfolded and extended state of the diaper 1 shown in FIG. Each leak-proof cuff 55 is a leak-proof cuff forming sheet 56 joined to the absorbent body 5, and an elastic member for leak-proof cuff forming fixed in an extended state near the free end of the leak-proof cuff forming sheet 56. 57, and a leak-proof cuff intermediate elastic member 58 fixed in an extended state between the fixed end and the free end of each leak-proof cuff 55 are provided. In the example shown in FIG. 4, as the leak-proof cuff forming sheet 56, one strip-shaped water-repellent sheet having a predetermined width is folded in half along the longitudinal direction thereof, and the opposing layers are hot-melt adhesive. Alternatively, a sheet having a two-layer structure bonded by a partial heat seal or an ultrasonic seal is used. The elastic member 57 and the leakage-proof cuff intermediate elastic member 58 described above are fixed in an elongated state between the layers of the two-layer structure sheet.

吸収体４を覆う表面シート２は、図４に示すように、吸収体４の縦方向Ｘに沿う両側部にて外装体１０側（非肌対向面側）に巻き下げられており、巻き下げられた部分で吸収体４の縦方向Ｘに沿う両側部を被覆している。吸収体４の縦方向Ｘに沿う両側部を巻き下げて被覆することで、吸収体４の該両側部の肌対向面側への良好な起立性が得られる。尚、起立性とは、起立し易さを意味する。表面シート２は、おむつ１では、吸収体４の両側部にて巻き下げられた縦方向Ｘに沿う両側端部２１，２１が吸収体４の非肌対向面側において、裏面シート３及び防漏カフ形成用シート５６にヒートシール、接着材等の接合手段により接合され固定されている。 As shown in FIG. 4, the surface sheet 2 covering the absorber 4 is wound down on both sides along the vertical direction X of the absorber 4 toward the exterior body 10 side (non-skin facing surface side), and is wound down. Both sides of the absorber 4 along the vertical direction X are covered with the removed portions. By winding and covering both side portions of the absorber 4 along the vertical direction X, good uprightness of the side portions of the absorber 4 on the skin-facing surface side can be obtained. The standing property means the ease of standing up. In the diaper 1, the front surface sheet 2 has the back surface sheet 3 and the leakage prevention on the non-skin facing surface side of the absorber 4, with both end portions 21 and 21 along the vertical direction X wound down on both side portions of the absorber 4. It is joined and fixed to the cuff forming sheet 56 by a joining means such as a heat seal or an adhesive.

吸収性本体５を固定する外装体１０は、上述したように、図２に示すおむつ１の展開且つ伸長状態において、腹側領域Ａ、股下領域Ｃ及び背側領域Ｂに亘っている。外装体１０は、外層シート１１、内層シート１２及び各領域でギャザーを形成する１本又は複数本（本実施形態では複数本）の弾性部材を有している。以下、外装体１０が有する弾性部材について説明する。 As described above, the exterior body 10 fixing the absorbent body 5 extends over the ventral region A, the inseam region C, and the dorsal region B in the unfolded and extended state of the diaper 1 shown in FIG. The exterior body 10 has an outer layer sheet 11, an inner layer sheet 12, and one or a plurality of elastic members (plural in the present embodiment) forming gathers in each region. Hereinafter, the elastic member of the exterior body 10 will be described.

外装体１０は、おむつ１では、図１に示すように、ウエスト開口部７に沿って配された１本又は複数本（本実施形態では複数本）のウエスト弾性部材７１を備えており、該ウエスト弾性部材７１によりウエストギャザー７０が形成されている。ウエスト弾性部材７１は、図２に示すおむつ１の展開且つ伸長状態において、腹側領域Ａ及び背側領域Ｂそれぞれの一方のサイドシール部Ｓから他方のサイドシール部Ｓに亘って横方向Ｙに伸長状態で外装体１０に固定されている。そして、腹側領域Ａ及び背側領域Ｂそれぞれの一方のサイドシール部Ｓと他方のサイドシール部Ｓとを接合することで、図１に示すように、ウエスト開口部７の全周に亘って実質的に連続した環状のウエストギャザー７０が形成されている。ウエスト弾性部材７１は、糸状又は帯状であり、外装体１０を構成する外層シート１１と内層シート１２との間に伸長状態でホットメルト型接着剤等の任意の接合手段により固定されている。またウエスト弾性部材７１は、おむつ１では、縦方向Ｘに等間隔を空けて配されている。 As shown in FIG. 1, the exterior body 10 includes one or a plurality of (plurality in the present embodiment) waist elastic members 71 arranged along the waist opening 7 in the diaper 1. The waist gather 70 is formed by the waist elastic member 71. In the deployed and extended state of the diaper 1 shown in FIG. 2, the waist elastic member 71 is laterally Y from one side seal portion S of each of the ventral region A and the dorsal region B to the other side seal portion S. It is fixed to the exterior body 10 in the extended state. Then, by joining one side seal portion S and the other side seal portion S of each of the ventral region A and the dorsal region B, as shown in FIG. 1, the entire circumference of the waist opening 7 is covered. A substantially continuous annular waist gather 70 is formed. The waist elastic member 71 has a thread-like or band-like shape, and is fixed between the outer layer sheet 11 and the inner layer sheet 12 constituting the exterior body 10 in an elongated state by an arbitrary joining means such as a hot melt type adhesive. Further, the waist elastic members 71 are arranged at equal intervals in the vertical direction X in the diaper 1.

また外装体１０は、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、腹側領域Ａのウエストギャザー７０の股下領域Ｃ側の下端と仮想腹側内方線Ｙａとの間、及び背側領域Ｂのウエストギャザー７０の股下領域Ｃ側の下端と仮想背側内方線Ｙｂとの間それぞれの胴回り部Ｄに配された１本又は複数本（本実施形態では複数本）の胴回り弾性部材９１を備えており、該胴回り弾性部材９１により、胴回りギャザー９０が形成されている。胴回り弾性部材９１は、腹側領域Ａ及び背側領域Ｂそれぞれの胴回り部Ｄにおいて横方向Ｙに伸長状態で外装体１０に固定されている。また胴回り弾性部材９１は、吸収性本体５と重なる外装体１０の部分において個々複数に分断されており、収縮力を発現しない状態になっている。その為、外装体１０には、腹側領域Ａ及び背側領域Ｂそれぞれの胴回り部Ｄにおける吸収性本体５と重なる部分においては胴回りギャザー９０が形成されない。これにより、胴回りギャザー９０は、図１に示すように、吸収性本体５と重なる外装体１０の部分において横方向Ｙに複数に分割された状態となっている。胴回り弾性部材９１は、糸状又は帯状であり、外装体１０を構成する外層シート１１と内層シート１２との間に伸長状態でホットメルト型接着剤等の任意の接合手段により固定されている。また胴回り弾性部材９１は、おむつ１では、縦方向Ｘに等間隔を空けて配されている。 Further, in the diaper 1, in the unfolded and extended state of the diaper 1 shown in FIG. 2, the exterior body 10 is located between the lower end of the waist gather 70 of the ventral region A on the inseam region C side and the virtual ventral inward line Ya. And one or more (plural in the present embodiment) arranged in the waist circumference D between the lower end of the waist gather 70 of the dorsal region B on the inseam region C side and the virtual dorsal inward line Yb. A waist circumference elastic member 91 is provided, and the waist circumference elastic member 91 forms a waist circumference gather 90. The waistline elastic member 91 is fixed to the exterior body 10 in a laterally extended state in the waistline portion D of each of the ventral region A and the dorsal region B. Further, the waistline elastic member 91 is individually divided into a plurality of portions at the portion of the exterior body 10 that overlaps with the absorbent main body 5, and is in a state of not exhibiting a contraction force. Therefore, the outer body 10 is not formed with the waist gathers 90 at the portions overlapping the absorbent main body 5 in the waist D of each of the ventral region A and the dorsal region B. As a result, as shown in FIG. 1, the waistline gather 90 is divided into a plurality of parts in the lateral direction Y at the portion of the exterior body 10 that overlaps with the absorbent body 5. The waistline elastic member 91 has a thread-like or band-like shape, and is fixed between the outer layer sheet 11 and the inner layer sheet 12 constituting the exterior body 10 in an elongated state by an arbitrary joining means such as a hot melt type adhesive. Further, the waistline elastic members 91 are arranged at equal intervals in the vertical direction X in the diaper 1.

また外装体１０は、おむつ１では、図１に示すように、一対のレッグ開口部８，８それぞれの開口周縁部に沿って配された１本又は複数本（本実施形態では３本）の腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂを備えており、外装体１０の一対のレッグ開口部８，８それぞれの開口周縁部には、該腹側レッグ弾性部材８１ａ及び該背側レッグ弾性部材８１ｂにより一対のレッグギャザー８０，８０が形成されている。 Further, in the diaper 1, as shown in FIG. 1, the exterior body 10 is one or a plurality of (three in the present embodiment) arranged along the perimeter of each of the pair of leg openings 8 and 8. A ventral leg elastic member 81a and a dorsal leg elastic member 81b are provided, and the ventral leg elastic member 81a and the dorsal leg are provided at the peripheral edges of each of the pair of leg openings 8 and 8 of the exterior body 10. A pair of leg gathers 80, 80 are formed by the elastic member 81b.

腹側レッグ弾性部材８１ａは、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、外装体１０における腹側領域Ａ側から一方のレッグ開口部８に沿って伸長状態で配され且つ股下領域Ｃの縦方向Ｘの中央部にて横方向Ｙの内方に向かって伸長状態で配され、更に、該外装体１０における腹側領域Ａ側から他方のレッグ開口部８に沿って伸長状態で配され且つ該股下領域Ｃの該中央部にて横方向Ｙの内方に向かって伸長状態で配されている。
腹側レッグ弾性部材８１ａの横方向Ｙの内方に向かって伸長状態で配されている部分は、股下領域Ｃにおける縦方向Ｘの中央部において、横中心線Ｙｃと仮想腹側内方線Ｙａとの間で横中心線Ｙｃ寄りを通って横方向Ｙの内方に延びて吸収性本体５と重なるように配されている。 In the diaper 1, the ventral leg elastic member 81a is arranged in the expanded and extended state of the diaper 1 shown in FIG. 2 from the ventral region A side of the exterior body 10 along one leg opening 8. It is arranged in an inwardly extending state in the lateral direction Y at the central portion of the inseam region C in the vertical direction X, and further extends from the ventral region A side of the exterior body 10 along the other leg opening 8. It is arranged in a state and is arranged in a state of being extended inward in the lateral direction Y at the central portion of the inseam region C.
The portion of the ventral leg elastic member 81a extending inward in the lateral direction Y is the lateral center line Yc and the virtual ventral inward line Ya in the central portion of the vertical direction X in the inseam region C. It is arranged so as to extend inward in the lateral direction Y through the lateral center line Yc and overlap with the absorbent body 5.

背側レッグ弾性部材８１ｂは、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、外装体１０における背側領域Ｂ側から一方のレッグ開口部８に沿って伸長状態で配され且つ股下領域Ｃの中央部にて横方向Ｙの内方に向かって伸長状態で配され、更に、該外装体１０における背側領域Ｂ側から他方のレッグ開口部８に沿って伸長状態で配され且つ該股下領域Ｃの該中央部にて横方向Ｙの内方に向かって伸長状態で配されている。
背側レッグ弾性部材８１ｂの横方向Ｙの内方に向かって伸長状態で配されている部分は、股下領域Ｃにおける縦方向Ｘの中央部において、横中心線Ｙｃと仮想腹側内方線Ｙａとの間で横中心線Ｙｃ寄りを通って横方向Ｙの内方に延びて吸収性本体５と重なっている。 In the diaper 1, the dorsal leg elastic member 81b is arranged in the unfolded and extended state of the diaper 1 shown in FIG. 2 in an extended state from the dorsal region B side of the exterior body 10 along one leg opening 8. It is arranged in an extended state in the lateral direction Y inward at the central portion of the inseam region C, and is further arranged in an extended state from the dorsal region B side of the exterior body 10 along the other leg opening 8. Moreover, it is arranged in a state of being extended inward in the lateral direction Y at the central portion of the inseam region C.
The portion of the dorsal leg elastic member 81b extending inward in the lateral direction Y is the lateral center line Yc and the virtual ventral inward line Ya in the central portion of the vertical direction X in the inseam region C. It extends inward in the lateral direction Y through the lateral center line Yc and overlaps with the absorbent body 5.

腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとは、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、股下領域Ｃの中央部において、おむつ１を縦方向Ｘに二分する横方向Ｙに延びる横中心線Ｙｃよりも腹側領域Ａ側で交差しており、交差している部分を含んで、該交差している部分から横方向Ｙの内方で接着剤により外装体１０に固定されている。 The ventral leg elastic member 81a and the dorsal leg elastic member 81b divide the diaper 1 into two in the vertical direction X at the central portion of the inseam region C in the unfolded and extended state of the diaper 1 shown in FIG. It intersects on the ventral region A side of the lateral center line Yc extending in the lateral direction Y, and includes the intersecting portion, and the exterior body is provided with an adhesive inward in the lateral direction Y from the intersecting portion. It is fixed at 10.

腹側レッグ弾性部材８１ａについて詳述すると、該腹側レッグ弾性部材８１ａは、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、腹側領域Ａの一方の側縁部ＡＳでホットメルト型接着剤により外装体１０に固定されている。そして、該一方の側縁部ＡＳから一方のレッグ開口部８の開口周縁部に沿って伸長状態で配され、股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定されている。同様に、腹側レッグ弾性部材８１ａは、腹側領域Ａの他方の側縁部ＡＳでホットメルト型接着剤により外装体１０に接合されている。そして、該他方の側縁部ＡＳから他方のレッグ開口部８の開口周縁部に沿って伸長状態で配され、股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定されている。腹側レッグ弾性部材８１ａは、フィット性能の観点から、腹側領域Ａの両側縁部ＡＳ，ＡＳ及び股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定され、縦方向Ｘへの収縮力をより低減させ横方向Ｙに延びる皺が発生するのを防ぐためにレッグ開口部８，８の開口周縁部においては未接着で外装体１０に固定されていない状態となっていることが好ましい。 The ventral leg elastic member 81a will be described in detail. In the diaper 1, the ventral leg elastic member 81a is hot at one side edge AS of the ventral region A in the expanded and extended state of the diaper 1 shown in FIG. It is fixed to the exterior body 10 with a melt type adhesive. Then, it is arranged in an extended state from the one side edge portion AS along the opening peripheral edge portion of the one leg opening portion 8, and is attached to the exterior body 10 by a hot melt type adhesive at the central portion of the inseam region C in the vertical direction X. It is fixed. Similarly, the ventral leg elastic member 81a is joined to the exterior body 10 by a hot melt type adhesive at the other side edge portion AS of the ventral region A. Then, it is arranged in an extended state from the other side edge AS along the opening peripheral edge of the other leg opening 8, and is attached to the exterior body 10 by a hot melt type adhesive at the central portion of the inseam region C in the vertical direction X. It is fixed. From the viewpoint of fit performance, the ventral leg elastic member 81a is fixed to the exterior body 10 with a hot melt type adhesive at both side edge portions AS, AS of the ventral region A and the central portion of the inseam region C in the vertical direction X. In order to further reduce the contraction force in the vertical direction X and prevent the occurrence of wrinkles extending in the horizontal direction Y, the peripheral edges of the leg openings 8 and 8 are not adhered and are not fixed to the exterior body 10. Is preferable.

背側レッグ弾性部材８１ｂについて詳述すると、該背側レッグ弾性部材８１ｂは、おむつ１では、図２に示すおむつ１の展開且つ伸長状態において、背側領域Ｂの一方の側縁部ＢＳでホットメルト型接着剤により外装体１０に固定されている。そして、該一方の側縁部ＢＳから一方のレッグ開口部８の開口周縁部に沿って伸長状態で配され、股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定されている。同様に、背側レッグ弾性部材８１ｂは、背側領域Ｂの他方の側縁部ＢＳでホットメルト型接着剤により外装体１０に接合されている。そして、該他方の側縁部ＢＳから他方のレッグ開口部８の開口周縁部に沿って伸長状態で配され、股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定されている。背側レッグ弾性部材８１ｂは、フィット性能の観点から、背側領域Ｂの両側縁部ＢＳ，ＢＳ及び股下領域Ｃの縦方向Ｘの中央部においてホットメルト型接着剤により外装体１０に固定され、縦方向Ｘへの収縮力をより低減させ横方向Ｙに延びる皺が発生するのを防ぐためにレッグ開口部８，８の開口周縁部においては未接着で外装体１０に固定されていない状態となっていることが好ましい。 The dorsal leg elastic member 81b will be described in detail. In the diaper 1, the dorsal leg elastic member 81b is hot at one side edge BS of the dorsal region B in the unfolded and extended state of the diaper 1 shown in FIG. It is fixed to the exterior body 10 with a melt-type adhesive. Then, it is arranged in an extended state from the one side edge BS along the opening peripheral edge of one leg opening 8, and is attached to the exterior body 10 by a hot melt type adhesive at the central portion of the inseam region C in the vertical direction X. It is fixed. Similarly, the dorsal leg elastic member 81b is joined to the exterior body 10 by a hot melt type adhesive at the other side edge BS of the dorsal region B. Then, it is arranged in an extended state from the other side edge BS along the opening peripheral edge of the other leg opening 8, and is attached to the exterior body 10 by a hot melt type adhesive at the central portion of the inseam region C in the vertical direction X. It is fixed. From the viewpoint of fit performance, the dorsal leg elastic member 81b is fixed to the exterior body 10 with a hot melt type adhesive at the central portions of both side edge portions BS, BS and inseam region C in the vertical direction X of the dorsal region B. In order to further reduce the contraction force in the vertical direction X and prevent the occurrence of wrinkles extending in the horizontal direction Y, the peripheral edges of the leg openings 8 and 8 are not adhered and are not fixed to the exterior body 10. Is preferable.

また、腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとは、図２に示すように、上述したように股下領域Ｃの中央部において横中心線Ｙｃよりも腹側領域Ａ側で交差し、互いに重なった状態で横方向Ｙの内方に向かって伸長状態で配されている。
例えば、本実施形態のように腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂそれぞれが３本の場合、最も内側に位置する腹側レッグ弾性部材８１ａと最も外側に位置する背側レッグ弾性部材８１ｂとが交差して重なり、最も外側に位置する腹側レッグ弾性部材８１ａと最も内側に位置する背側レッグ弾性部材８１ｂとが交差して重なる。そして、中間に位置する腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとが交差して重なるように配されている。このようにおむつ１では、股下領域Ｃの中央部において、３本の腹側及び背側レッグ弾性部材８１ａ，８１ｂが縦方向Ｘに間隔を空けて並置された状態で、横方向Ｙの内方に向かって配されている。
そして、腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとは、それぞれが交差している部分を含んで、該交差している部分から横方向Ｙの内方でホットメルト型接着剤により外装体１０に固定されている。おむつ１では、腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとは、吸収体４と重なる外装体１０の部分で交差しており、該部分で外装体１０に固定されている。 Further, as shown in FIG. 2, the ventral leg elastic member 81a and the dorsal leg elastic member 81b intersect at the central portion of the inseam region C on the ventral region A side of the lateral center line Yc as described above. , They are arranged in a state of being overlapped with each other and extending inward in the lateral direction Y.
For example, when there are three each of the ventral leg elastic member 81a and the dorsal leg elastic member 81b as in the present embodiment, the ventral leg elastic member 81a located on the innermost side and the dorsal leg elastic member 81b located on the outermost side are provided. The 81b intersects and overlaps, and the ventral leg elastic member 81a located on the outermost side and the dorsal leg elastic member 81b located on the innermost side intersect and overlap. The ventral leg elastic member 81a located in the middle and the dorsal leg elastic member 81b are arranged so as to intersect and overlap each other. In this way, in the diaper 1, in the central portion of the inseam region C, the three ventral and dorsal leg elastic members 81a and 81b are juxtaposed in the vertical direction X at intervals, and inward in the horizontal direction Y. It is arranged toward.
The ventral leg elastic member 81a and the dorsal leg elastic member 81b include a portion where they intersect with each other, and are exteriorized by a hot melt adhesive in the lateral direction Y from the intersecting portion. It is fixed to the body 10. In the diaper 1, the ventral leg elastic member 81a and the dorsal leg elastic member 81b intersect at a portion of the exterior body 10 that overlaps with the absorber 4, and is fixed to the exterior body 10 at that portion.

また、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂの本数としては、フィット性能の観点から、好ましくは１本以上、更に好ましくは２本以上、縦方向Ｘへの収縮力をより低減させ横方向に延びる皺が発生するのを防ぐ観点から好ましくは５本以下、更に好ましくは３本以下であり、好ましくは１本以上５本以下、より好ましくは２本以上３本以下である。 Further, the number of the ventral leg elastic members 81a and the dorsal leg elastic members 81b is preferably one or more, more preferably two or more, from the viewpoint of fit performance, to further reduce the contraction force in the vertical direction X. From the viewpoint of preventing the occurrence of wrinkles extending in the lateral direction, the number is preferably 5 or less, more preferably 3 or less, preferably 1 or more and 5 or less, and more preferably 2 or more and 3 or less.

腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂが複数本の場合、複数の該腹側レッグ弾性部材８１ａ及び該背側レッグ弾性部材８１ｂは、応力を分散させず吸収体を支えるために、背側領域Ｂの両側縁部ＢＳ，ＢＳ及び腹側領域Ａの両側縁部ＡＳ，ＡＳで外装体１０に固定される際の縦方向Ｘの間隔よりも、縦方向Ｘの中央部で外装体１０に固定される際の縦方向Ｘの間隔の方が狭いことが好ましい。この場合縦方向Ｘの中央部では、複数の該腹側レッグ弾性部材８１ａどうし及び複数の該背側レッグ弾性部材８１ｂどうしの縦方向Ｘの間隔がないことが好ましい。 When there are a plurality of ventral leg elastic members 81a and dorsal leg elastic members 81b, the plurality of ventral leg elastic members 81a and the dorsal leg elastic members 81b support the absorber without dissipating stress. The exterior body is located at the center of the vertical direction X rather than the interval of the vertical X when fixed to the exterior body 10 at the bilateral edge portions BS, BS of the dorsal region B and the bilateral edge portions AS, AS of the ventral region A. It is preferable that the interval in the vertical direction X when fixed to 10 is narrower. In this case, in the central portion of the vertical direction X, it is preferable that there is no vertical distance between the plurality of ventral leg elastic members 81a and the plurality of dorsal leg elastic members 81b.

腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂが複数本の場合、複数の該腹側レッグ弾性部材８１ａ及び該背側レッグ弾性部材８１ｂは、背側領域Ｂの両側縁部ＢＳ，ＢＳ及び腹側領域Ａの両側縁部ＡＳ，ＡＳと縦方向Ｘの中央部とのそれぞれで縦方向Ｘの間隔が等しくなるように外装体１０に固定されることが好ましい。 When there are a plurality of ventral leg elastic members 81a and dorsal leg elastic members 81b, the plurality of ventral leg elastic members 81a and the dorsal leg elastic members 81b are formed on both side edges BS, BS and the dorsal region B. It is preferable that both side edges AS and AS of the ventral region A and the central portion in the vertical direction X are fixed to the exterior body 10 so that the intervals in the vertical direction X are equal.

更におむつ１では、股下領域Ｃの中央部において、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αが、３０度以上９０度以下である。角度αについて詳述すると、股下領域Ｃの中央部において、おむつ１では、図３（ａ）に示すように、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角度αは３０度以上であり、好ましくは５０度以上、より好ましくは６０度以上である。また該角度αは９０度以下である。具体的に該角度αは３０度以上９０度以下であり、好ましくは５０度以上９０度以下、より好ましくは６０度以上９０度以下である。尚、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角度αは、鈍角ではなく鋭角の方の角度を意味する。 Further, in the diaper 1, in the central portion of the inseam region C, the angle α formed by the dorsal leg elastic member 81b and the side edges 46 and 46 of the absorber 4 along the vertical direction X is 30 degrees or more and 90 degrees or less. .. To elaborate on the angle α, in the central portion of the inseam region C, in the diaper 1, as shown in FIG. 3A, both side edges 46, 46 of the dorsal leg elastic member 81b and the absorber 4 along the vertical direction X The angle α formed with each of them is 30 degrees or more, preferably 50 degrees or more, and more preferably 60 degrees or more. The angle α is 90 degrees or less. Specifically, the angle α is 30 degrees or more and 90 degrees or less, preferably 50 degrees or more and 90 degrees or less, and more preferably 60 degrees or more and 90 degrees or less. The angle α formed by the dorsal leg elastic member 81b and the side edges 46 and 46 of the absorber 4 along the vertical direction X means an acute angle rather than an obtuse angle.

背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αは、例えば、背側レッグ弾性部材８１ｂを複数有する場合は、少なくとも１本の背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αが上記範囲内にあればよく、複数の背側レッグ弾性部材８１ｂのそれぞれが全て吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αが上記範囲内にあることが好ましい。 The angle α formed by the dorsal leg elastic member 81b and the side edges 46, 46 of the absorber 4 along the vertical direction X is, for example, at least one dorsal leg when having a plurality of dorsal leg elastic members 81b. It is sufficient that the angle α formed by the elastic member 81b and both side edges 46 and 46 along the vertical direction X of the absorber 4 is within the above range, and each of the plurality of dorsal leg elastic members 81b is vertical of the absorber 4. It is preferable that the angle α formed by each of the side edges 46 and 46 along the direction X is within the above range.

股下領域Ｃの中央部において、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αを３０度以上９０度以下とすることで、背側レッグ弾性部材８１ｂによる吸収体４の縦方向Ｘに沿う方向に作用する収縮力が低減され、吸収体４の横方向Ｙに皴が発生することが抑制される。
例えば、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角をαとすると、吸収体４の縦方向Ｘに沿う両側縁４６，４６が背側レッグ弾性部材８１ｂの収縮力により縦方向Ｘに作用する応力はｃｏｓαで表せる。ｃｏｓαの値は、角度αが９０度に近づくほど小さくなるので、背側レッグ弾性部材８１ｂと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角αを３０度以上９０度以下とすることで、股下領域Ｃに配された吸収体４上に皺を発生し難くすると共に、一対のレッグ開口部８，８における良好なフィット性を維持することができる。 In the central portion of the inseam region C, the angle α formed by the elastic member 81b of the dorsal leg and the both side edges 46 and 46 along the vertical direction X of the absorber 4 is set to 30 degrees or more and 90 degrees or less so that the dorsal leg is formed. The contraction force of the elastic member 81b acting in the direction along the vertical direction X of the absorber 4 is reduced, and the occurrence of wrinkles in the lateral direction Y of the absorber 4 is suppressed.
For example, assuming that the angle formed by the dorsal leg elastic member 81b and the side edges 46, 46 of the absorber 4 along the vertical direction X is α, the side edges 46, 46 of the absorber 4 along the vertical direction X are the dorsal sides. The stress acting in the vertical direction X due to the contraction force of the leg elastic member 81b can be expressed by cosα. Since the value of cosα decreases as the angle α approaches 90 degrees, the angle α formed by the dorsal leg elastic member 81b and the side edges 46 and 46 along the vertical direction X of the absorber 4 is 30 degrees or more and 90 degrees. By doing so, it is possible to prevent wrinkles from being generated on the absorber 4 arranged in the inseam region C, and to maintain good fit in the pair of leg openings 8 and 8.

また、おむつ１では、図２に示すおむつの展開且つ伸長状態において、外装体１０の股下領域Ｃは、腹側レッグ弾性部材８１ａと背側レッグ弾性部材８１ｂとが交差している部分どうしの間に、該腹側レッグ弾性部材８１ａ及び該背側レッグ弾性部材８１ｂが収縮力を発現する状態で配されていない部分を有している。
おむつ１では、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、股下領域Ｃにおける縦方向Ｘの中央部の吸収性本体５と重なる部分においては、一対の側部非積繊部４４，４４から横方向Ｙの外方では伸長状態で外装体１０に固着されている。そして、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、該一対の側部非積繊部４４，４４どうしの間では収縮力が発現する状態では配されていない。
腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂの収縮力を発現させないようにするには、例えば、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂを熱により硬化させることもできるが、おむつ１では、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂを個々複数個に分断することで収縮力を発現しないようにしている。即ち、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、おむつ１では、一対の側部非積繊部４４，４４どうしの間で分断され、横方向Ｙに分割された状態となっている。
腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂを一対の側部非積繊部４４，４４から横方向Ｙの外方では伸長状態で外装体１０に固着させ、一対の側部非積繊部４４，４４どうしの間では収縮力が発現する状態で配さないことで、吸収性コア４０（下部吸収層４１２）の縦方向Ｘに沿った両側部の良好な起立性が得られる。 Further, in the diaper 1, in the unfolded and extended state of the diaper shown in FIG. 2, the inseam region C of the exterior body 10 is between the portions where the ventral leg elastic member 81a and the dorsal leg elastic member 81b intersect. In addition, the ventral leg elastic member 81a and the dorsal leg elastic member 81b have a portion that is not arranged in a state of exhibiting a contraction force.
In the diaper 1, the ventral leg elastic member 81a and the dorsal leg elastic member 81b overlap with the absorbent body 5 in the central portion of the vertical direction X in the inseam region C, where the pair of side non-stacking portions 44, From 44 to the outside in the lateral direction Y, it is fixed to the exterior body 10 in an extended state. The ventral leg elastic member 81a and the dorsal leg elastic member 81b are not arranged in a state where a contraction force is exhibited between the pair of side non-stacked fiber portions 44, 44.
In order to prevent the contraction force of the ventral leg elastic member 81a and the dorsal leg elastic member 81b from being exhibited, for example, the ventral leg elastic member 81a and the dorsal leg elastic member 81b can be cured by heat. In the diaper 1, the ventral leg elastic member 81a and the dorsal leg elastic member 81b are individually divided into a plurality of pieces so as not to exhibit a contraction force. That is, in the diaper 1, the ventral leg elastic member 81a and the dorsal leg elastic member 81b are divided between the pair of side non-stacked fiber portions 44, 44, and are divided in the lateral direction Y. There is.
The ventral leg elastic member 81a and the dorsal leg elastic member 81b are fixed to the exterior body 10 in an extended state in the lateral direction Y from the pair of side non-stacked fibers 44, 44, and the pair of side non-stacked fibers By not arranging the portions 44 and 44 in a state in which a contractile force is exhibited, good uprightness of both portions along the vertical direction X of the absorbent core 40 (lower absorbing layer 412) can be obtained.

またおむつ１では、股下領域Ｃの中央部において、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角βが、４０度以上９０度以下である。角度βについて詳述すると、股下領域Ｃの中央部において、おむつ１では、図３（ｂ）に示すように、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角度βは４０度以上であることが好ましく、より好ましくは５０度以上、さらに好ましくは６０度以上である。また該角度βは９０度以下であることが好ましい。具体的に該角度βは４０度以上９０度以下であることが好ましく、より好ましくは５０度以上９０度以下、さらに好ましくは６０度以上９０度以下である。尚、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角度βは、鈍角ではなく鋭角の方の角度を意味する。 Further, in the diaper 1, in the central portion of the inseam region C, the angle β formed by the ventral leg elastic member 81a and the side edges 46 and 46 of the absorber 4 along the vertical direction X is 40 degrees or more and 90 degrees or less. .. To elaborate on the angle β, in the central portion of the inseam region C, in the diaper 1, as shown in FIG. 3B, both side edges 46, 46 of the ventral leg elastic member 81a and the absorber 4 along the vertical direction X The angle β formed with each of them is preferably 40 degrees or more, more preferably 50 degrees or more, and further preferably 60 degrees or more. The angle β is preferably 90 degrees or less. Specifically, the angle β is preferably 40 degrees or more and 90 degrees or less, more preferably 50 degrees or more and 90 degrees or less, and further preferably 60 degrees or more and 90 degrees or less. The angle β formed by the ventral leg elastic member 81a and the side edges 46 and 46 of the absorber 4 along the vertical direction X means an acute angle rather than an obtuse angle.

腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角度βとしては、例えば、腹側レッグ弾性部材８１ａを複数有する場合は、少なくとも１本の腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角βが上記範囲内にあればよく、複数の腹側レッグ弾性部材８１ａのそれぞれが全て吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角βが上記範囲内にあることが好ましい。 The angle β formed by the ventral leg elastic member 81a and the side edges 46 and 46 of the absorber 4 along the longitudinal direction X is, for example, at least one ventral side when a plurality of ventral leg elastic members 81a are provided. It is sufficient that the angle β formed by the leg elastic member 81a and the side edges 46, 46 along the vertical direction X of the absorber 4 is within the above range, and each of the plurality of ventral leg elastic members 81a is all of the absorber 4. It is preferable that the angle β formed by each of the side edges 46 and 46 along the vertical direction X is within the above range.

股下領域Ｃの中央部において、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角βを４０度以上９０度以下とすることで、腹側レッグ弾性部材８１ａによる吸収体４の縦方向Ｘに沿う方向に作用する収縮力が低減され、吸収体４の横方向Ｙに皴が発生することが抑制される。
例えば、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角をβとすると、吸収体４の縦方向Ｘに沿う両側縁４６，４６が腹側レッグ弾性部材８１ａの収縮力により縦方向Ｘに作用する応力はｃｏｓβで表せる。ｃｏｓβの値は、角度βが９０度に近づくほど小さくなるので、腹側レッグ弾性部材８１ａと吸収体４の縦方向Ｘに沿う両側縁４６，４６それぞれとのなす角βを４０度以上９０度以下とすることで、股下領域Ｃに配された吸収体４上に皺を発生し難くすると共に、一対のレッグ開口部８，８における良好なフィット性を維持することができる。 In the central portion of the inseam region C, the angle β formed by the ventral leg elastic member 81a and the side edges 46 and 46 of the absorber 4 along the vertical direction X is set to 40 degrees or more and 90 degrees or less so that the ventral leg is formed. The contraction force of the elastic member 81a acting in the direction along the vertical direction X of the absorber 4 is reduced, and the occurrence of wrinkles in the lateral direction Y of the absorber 4 is suppressed.
For example, assuming that the angle formed by the ventral leg elastic member 81a and the side edges 46, 46 of the absorber 4 along the vertical direction X is β, the side edges 46, 46 of the absorber 4 along the vertical direction X are ventral. The stress acting on the leg elastic member 81a in the vertical direction X due to the contraction force can be expressed by cosβ. Since the value of cos β becomes smaller as the angle β approaches 90 degrees, the angle β formed by the ventral leg elastic member 81a and the side edges 46 and 46 along the vertical direction X of the absorber 4 is 40 degrees or more and 90 degrees. By doing so, it is possible to prevent wrinkles from being generated on the absorber 4 arranged in the inseam region C, and to maintain good fit in the pair of leg openings 8 and 8.

またおむつ１では、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、その太さが３１０ｄｔｅｘ以上６２０ｄｔｅｘ以下である。腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、おむつ１では、その太さが ｄｔｅｘである。腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂの太さとしては、フィット性能の観点から好ましくは３１０ｄｔｅｘ以上、より好ましくは４７０ｄｔｅｘ以上、縦方向Ｘへの収縮力をより低減させ横方向に延びる皺が発生するのを防ぐ観点から好ましくは６２０ｄｔｅｘ以下、好ましくは３１０ｄｔｅｘ以上６２０ｄｔｅｘ以下、より好ましくは４７０ｄｔｅｘ以上６２０ｄｔｅｘ以下である。腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂの太さを３１０ｄｔｅｘ以上６２０ｄｔｅｘ以下とすることで、フィット性能と皺低減効果の両立が可能となる。 Further, in the diaper 1, the thickness of the ventral leg elastic member 81a and the dorsal leg elastic member 81b is 310 dtex or more and 620 dtex or less. The thickness of the ventral leg elastic member 81a and the dorsal leg elastic member 81b is dtex in the diaper 1. From the viewpoint of fit performance, the thickness of the ventral leg elastic member 81a and the dorsal leg elastic member 81b is preferably 310 dtex or more, more preferably 470 dtex or more, further reducing the contraction force in the vertical direction X and extending in the lateral direction. From the viewpoint of preventing the occurrence of wrinkles, it is preferably 620 dtex or less, preferably 310 dtex or more and 620 dtex or less, and more preferably 470 dtex or more and 620 dtex or less. By setting the thickness of the ventral leg elastic member 81a and the dorsal leg elastic member 81b to 310 dtex or more and 620 dtex or less, it is possible to achieve both fit performance and wrinkle reduction effect.

またおむつ１では、図２に示すおむつ１の展開且つ伸長状態において、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、交差している部分から横方向Ｙの内方に、下部吸収層４１２の各側部非積繊部４４と重なる位置まで延出している。腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂは、各側部非積繊部４４の横方向Ｙの全域に亘って各側部非積繊部４４と重なる外装体１０の部分に配されることが好ましいが、各側部非積繊部４４の横方向Ｙの一部に重なる外装体１０の部分に配されていればよい。例えば、各側部非積繊部４４の横方向Ｙの長さの半分以上が各側部非積繊部４４と重なる外装体１０の部分に配されていればよい。
腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂが股下領域Ｃの中央部において、各側部非積繊部４４と重なる部分まで横方向Ｙに配されることで、一対の側部非積繊部４４，４４を折り曲げ起点として低坪量部４２，４２が起立することで、良好な横漏れ防止性が得られると共にフィット性が向上する。
例えば、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂを複数有する場合は、少なくとも１本の腹側レッグ弾性部材８１ａ又は背側レッグ弾性部材８１ｂと各側部非積繊部４４と重なる外装体１０の部分に配されていればよく、複数の腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂのそれぞれが全て各側部非積繊部４４と重なる外装体１０の部分に配されていることが好ましい。 Further, in the diaper 1, in the expanded and extended state of the diaper 1 shown in FIG. 2, the ventral leg elastic member 81a and the dorsal leg elastic member 81b are formed in the lower absorption layer in the lateral direction Y from the intersecting portion. It extends to a position where it overlaps with each side non-stacked fiber portion 44 of 412. The ventral leg elastic member 81a and the dorsal leg elastic member 81b are arranged on a portion of the exterior body 10 that overlaps with each side non-stacked fiber portion 44 over the entire lateral direction Y of each side non-stacked fiber portion 44. However, it may be arranged on the portion of the exterior body 10 that overlaps a part of the lateral Y of each side non-stacked fiber portion 44. For example, more than half of the length of each side non-stacked fiber portion 44 in the lateral direction Y may be arranged on the portion of the exterior body 10 that overlaps with each side portion non-stacked fiber portion 44.
The ventral leg elastic member 81a and the dorsal leg elastic member 81b are arranged in the lateral direction Y up to a portion overlapping each side non-stacking portion 44 in the central portion of the inseam region C, whereby a pair of side non-stacking members are arranged. By having the low basis weight portions 42, 42 stand up with the fiber portions 44, 44 as the bending starting point, good lateral leakage prevention can be obtained and the fit can be improved.
For example, when a plurality of ventral leg elastic members 81a and dorsal leg elastic members 81b are provided, the exterior overlaps with at least one ventral leg elastic member 81a or dorsal leg elastic member 81b and each side non-folding fiber portion 44. It suffices to be arranged on the portion of the body 10, and each of the plurality of ventral leg elastic members 81a and the dorsal leg elastic member 81b is arranged on the portion of the exterior body 10 that overlaps with each side non-folding fiber portion 44. It is preferable to have.

次に、おむつ１の形成材料について説明する。
おむつ１の各部の形成材料としては、従来のパンツ型使い捨ておむつの当該部分に用いられる各種のものを特に制限なく用いることができる。例えば、表面シート２としては、親水性且つ液透過性の不織布、樹脂フィルムに開孔を形成したもの等を用いることができ、裏面シート３としては、透湿性又は非透湿性の樹脂フィルムや該樹脂フィルムと不織布の積層体等を用いることができる。 Next, the material for forming the diaper 1 will be described.
As the material for forming each part of the diaper 1, various materials used for the part of the conventional pants-type disposable diaper can be used without particular limitation. For example, as the front surface sheet 2, a hydrophilic and liquid permeable non-woven fabric, a resin film having holes formed, or the like can be used, and as the back surface sheet 3, a moisture permeable or non-moisture permeable resin film or the like. A laminate of a resin film and a non-woven fabric or the like can be used.

吸収性コア４０を構成する繊維集合体を構成する繊維としては、例えば、パルプ繊維、レーヨン繊維、コットン繊維、酢酸セルロース等の親水性繊維、ポリエチレン、ポリプロピレン等のポリオレフィン系繊維、ポリエステル、ポリアミド等の縮合系繊維等を用いることできる。繊維集合体は、空気流に載せて供給した繊維材料を、所定形状の凹部内に吸引して堆積させる積繊工程を経て得られるものが好ましい。繊維材料とともに機能性材料を混合積繊したものであっても良い。機能性材料の保持形態は、２枚の繊維集合体間に挟んで保持する形態や、混合積繊して繊維間に保持させた状態等が挙げられる。繊維及び吸水性ポリマー等の機能性材料は、それぞれ、一種又は二種以上を組み合わせて用いることができる。吸水性ポリマーとしては、例えば、ポリアクリル酸ナトリウム、（アクリル酸−ビニルアルコール）共重合体、ポリアクリル酸ナトリウム架橋体、（でんぷん−アクリル酸）グラフト共重合体、（イソブチレン−無水マレイン酸）共重合体及びそのケン化物、ポリアスパラギン酸等からなる粒子等が挙げられる。 Examples of the fibers constituting the fiber aggregate constituting the absorbent core 40 include pulp fibers, rayon fibers, cotton fibers, hydrophilic fibers such as cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, polyester and polyamide. Condensed fibers and the like can be used. The fiber aggregate is preferably obtained through a fiber stacking step in which a fiber material supplied on an air stream is sucked and deposited in a recess having a predetermined shape. It may be a mixture of a functional material and a fiber material. Examples of the holding form of the functional material include a form in which the functional material is sandwiched between two fiber aggregates and a state in which the functional material is held between the fibers by a mixed product. Functional materials such as fibers and water-absorbent polymers can be used alone or in combination of two or more. Examples of the water-absorbent polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked polymer, (dempun-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride). Examples thereof include a polymer, a saponified product thereof, and particles made of polyasparaginic acid and the like.

防漏カフ形成用シート５６としては、スパンボンド・メルトブローン・スパンボンド等からなる多層構造の複合不織布、スパンボンド不織布、ヒートボンド不織布、エアスルー不織布等を用いることができる。 As the leak-proof cuff forming sheet 56, a multilayer structure composite non-woven fabric made of spunbond, meltblown, spunbond or the like, a spunbond non-woven fabric, a heat-bonded non-woven fabric, an air-through non-woven fabric or the like can be used.

ウエスト弾性部材７１、胴回り弾性部材９１、腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂ等の弾性部材としては、通常、使い捨ておむつ等の吸収性物品に用いられるものであれば、特に制限なく用いることができる。例えば、弾性部材７１，９１，８１ａ，８１ｂの形態としては、糸状のもの（糸ゴム等）、所定幅の帯状のもの（平ゴム等）等が好ましく、特に糸状のものが好ましい。また弾性部材７１，９１，８１ａ，８１ｂの素材としては、天然ゴム、スチレン−ブタジエン、ブタジエン、イソプレン、ネオプレン等の合成ゴム、ＥＶＡ、伸縮性ポリオレフィン、ウレタン等を挙げることができる。弾性部材７１，９１，８１ａ，８１ｂの伸張倍率としては、肌に弾性体跡などのトラブルを起こさないことと、脚周りに隙間を生じさせないことを両立するという観点から、１６０％〜２５０％であることが好ましく、２００％〜２４０％であることがさらに好ましい。ここでいう伸張倍率とは、未伸張時の長さをＡ（ｍｍ）、伸張時の長さをＢ（ｍｍ）とした際、次式から求められる値である。
伸張倍率（％）＝（Ｂ／Ａ）×１００ The elastic members such as the waist elastic member 71, the waist elastic member 91, the ventral leg elastic member 81a, and the dorsal leg elastic member 81b are not particularly limited as long as they are usually used for absorbent articles such as disposable diapers. Can be used. For example, as the form of the elastic members 71, 91, 81a, 81b, a thread-like one (thread rubber or the like), a strip-shaped member having a predetermined width (flat rubber or the like), or the like is preferable, and a thread-like one is particularly preferable. Examples of the materials of the elastic members 71, 91, 81a and 81b include natural rubber, synthetic rubber such as styrene-butadiene, butadiene, isoprene and neoprene, EVA, elastic polyolefin and urethane. The stretch ratio of the elastic members 71, 91, 81a, 81b is 160% to 250% from the viewpoint of not causing troubles such as elastic traces on the skin and not creating a gap around the legs. It is preferably present, and more preferably 200% to 240%. The stretch ratio referred to here is a value obtained from the following equation when the unstretched length is A (mm) and the stretched length is B (mm).
Stretch magnification (%) = (B / A) x 100

胴回り弾性部材９１，腹側レッグ弾性部材８１ａ及び背側レッグ弾性部材８１ｂの収縮力を発現しないように個々を分断するためのカットには、各種公知の切断手段を用いることができる。例えばピンチカッター、ロータリーダイカッター、ヒートシールカッター、超音波カッター、ウォータージェットカッター等を用いることができる。 Various known cutting means can be used for cutting the waist elastic member 91, the ventral leg elastic member 81a, and the dorsal leg elastic member 81b so as not to exhibit the contractile force. For example, a pinch cutter, a rotary die cutter, a heat seal cutter, an ultrasonic cutter, a water jet cutter and the like can be used.

外装体１０を構成する外層シート１１及び内層シート１２としては、通常、使い捨ておむつ等の吸収性物品に用いられるものであれば、特に制限なく用いることができる。例えば、外層シート１１及び内層シート１２としては、撥水性の不織布等を用いることができる。 The outer layer sheet 11 and the inner layer sheet 12 constituting the exterior body 10 can be used without particular limitation as long as they are usually used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 11 and the inner layer sheet 12, a water-repellent non-woven fabric or the like can be used.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は上述の実施形態に限定されない。 Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment.

例えば、本実施形態では、より一層の横方向Ｙの屈曲性を高める観点から、図２に示すように、おむつ１の吸収性コア４０に中央非積繊部４３及び一対の側部非積繊部４４，４４を設けたが、本発明のパンツ型使い捨ておむつは、吸収性コア４０に一対の側部非積繊部４４，４４を設けるのみでも吸収性コア４０の横方向Ｙの屈曲性を高めることができる。 For example, in the present embodiment, from the viewpoint of further enhancing the flexibility in the lateral direction Y, as shown in FIG. 2, the absorbent core 40 of the diaper 1 has a central non-stacked portion 43 and a pair of side non-stacked fibers. Although the portions 44 and 44 are provided, in the pants-type disposable diaper of the present invention, the flexibility of the absorbent core 40 in the lateral direction is increased only by providing the pair of side non-stacked fiber portions 44 and 44 on the absorbent core 40. Can be enhanced.

また、本実施形態では、図１に示すように、腹側領域Ａ、股下領域Ｃ及び背側領域Ｂに亘る外装体１０を有するおむつ１を用いて説明したが、本発明では、外装体が着用者の背側に配される背側シート部材と腹側に配される腹側シート部材とに分割されており、背側シート部材と腹側シート部材とが一対のサイドシール部で接合されて筒状をなしているとともに、吸収性本体が、背側シート部材と腹側シート部材との間に架け渡して固定されている外包材分割タイプのパンツ型使い捨ておむつであっても良い。 Further, in the present embodiment, as shown in FIG. 1, the diaper 1 having the exterior body 10 extending over the ventral region A, the inseam region C, and the dorsal region B has been described, but in the present invention, the exterior body is It is divided into a dorsal seat member arranged on the back side of the wearer and a ventral seat member arranged on the ventral side, and the dorsal seat member and the ventral seat member are joined by a pair of side seal portions to form a cylinder. It may be a pants-type disposable diaper of the outer packaging material split type, which has a shape and the absorbent main body is bridged and fixed between the dorsal seat member and the ventral seat member.

また、本実施形態では、図４に示すように、下部吸収層４１２の肌対向面上に上部吸収層４１１が積層された２層構造となる部分を高坪量部４１としたが、本発明では、高坪量部は単層構造の吸収性コアの一部に設けた肉厚部分であっても良い。また本実施形態では、縦方向Ｘに沿って厚さ方向に貫通した連続線状の中央非積繊部及び一対の側部非積繊部を用いたが、本発明では、連続線状のものに代えて、部分的に不連続な部分を有する中央非積繊部及び一対の側部非積繊部を用いても良い。 Further, in the present embodiment, as shown in FIG. 4, the portion having a two-layer structure in which the upper absorption layer 411 is laminated on the skin facing surface of the lower absorption layer 412 is defined as the high basis weight portion 41, but the present invention. Then, the high basis weight portion may be a thick portion provided in a part of the absorbent core having a single layer structure. Further, in the present embodiment, a continuous linear central non-stacked portion and a pair of side non-stacked fiber portions penetrating in the thickness direction along the vertical direction X are used, but in the present invention, the continuous linear portion is used. Alternatively, a central non-stacked portion having a partially discontinuous portion and a pair of side non-stacked fiber portions may be used.

１ パンツ型使い捨ておむつ
４ 吸収体
４０ 吸収性コア
４１ 高坪量部
４２ 低坪量部
４１１ 上部吸収層
４１２ 下部吸収層
４４ 側部非積繊部
５ 吸収性本体
７ ウエスト開口部
７０ウエストギャザー
８ レッグ開口部
８０ レッグギャザー
８１ａ 腹側レッグ弾性部材
８１ｂ 背側レッグ弾性部材
１０ 外装体
Ａ 腹側領域
Ｂ 背側領域
Ｃ 股下領域
ＡＳ 外装体の腹側領域側の両側縁部
ＢＳ 外装体の背側領域側の両側縁部
Ｓ サイドシール部
Ｙｃ 横中心線 1 Pants type disposable diaper 4 Absorber 40 Absorbent core 41 High basis weight part 42 Low basis weight part 411 Upper absorption layer 412 Lower absorption layer 44 Side non-layered part 5 Absorbent body 7 Waist opening 70 Waist gather 8 legs Opening 80 leg gather 81a ventral leg elastic member 81b dorsal leg elastic member 10 exterior body A ventral region B dorsal region C inseam region AS bilateral margins on the ventral region side of the exterior body BS dorsal region of the exterior body Side side edge S Side seal Yc Horizontal center line

Claims (4)

着用者の前後方向に相当する縦方向とこれに直交する横方向とを有し、該着用者の腹側に配される腹側領域、股間部に配される股下領域及び背側に配される背側領域に亘る外装体と、該外装体の肌対向面側に固定された吸収体を有する吸収性本体とを備え、前記腹側領域における前記外装体の両側縁部と前記背側領域における前記外装体の両側縁部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、
前記一対のレッグ開口部それぞれの開口周縁部に沿って配された腹側レッグ弾性部材及び背側レッグ弾性部材により一対のレッグギャザーが形成されており、
前記パンツ型使い捨ておむつの展開且つ伸長状態において、
前記腹側レッグ弾性部材は、前記外装体における前記腹側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の縦方向の中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記腹側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、
前記背側レッグ弾性部材は、前記外装体における前記背側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の前記中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記背側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、
前記腹側レッグ弾性部材と前記背側レッグ弾性部材とは、前記股下領域の前記中央部において、前記パンツ型使い捨ておむつを縦方向に二分する横方向に延びる横中心線よりも前記腹側領域側で交差しており、交差している部分から横方向の内方で接着剤により前記外装体に固定されており、
前記股下領域の前記中央部において、前記背側レッグ弾性部材と前記吸収体の縦方向に沿う両側縁それぞれとのなす角が、３０度以上９０度以下であり、
前記パンツ型使い捨ておむつの展開且つ伸長状態において、
前記腹側レッグ弾性部材と前記吸収体の縦方向に沿う両側縁それぞれとのなす角度が、４０度以上９０度以下である、パンツ型使い捨ておむつ。 It has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and is arranged in the ventral region arranged on the ventral side of the wearer, the inseam region arranged in the crotch portion, and the dorsal side. It includes an exterior body extending over the dorsal region and an absorbent body having an absorber fixed to the skin facing surface side of the exterior body, and both side edges of the exterior body and the dorsal region in the ventral region. A pants-type disposable diaper in which both side edges of the exterior body are joined to form a pair of side seals, a waist opening, and a pair of leg openings.
A pair of leg gathers are formed by the ventral leg elastic member and the dorsal leg elastic member arranged along the peripheral edge of each of the pair of leg openings.
In the unfolded and stretched state of the pants-type disposable diaper,
The ventral leg elastic member is arranged in an extended state from the ventral region side of the exterior body along one of the leg openings, and is arranged laterally inward at the vertical center portion of the inseam region. Arranged in an extended state toward the outer body, and further arranged in an extended state along the other leg opening from the ventral region side of the exterior body, and laterally inward at the central portion of the inseam region. It is arranged in an extended state toward
The dorsal leg elastic member is arranged in an extended state from the dorsal region side of the exterior body along one of the leg openings, and is arranged laterally inward at the central portion of the inseam region. Arranged in an extended state, further arranged in an extended state along the other leg opening from the dorsal region side of the exterior body, and laterally inward at the central portion of the inseam region. Arranged in a stretched state,
The ventral leg elastic member and the dorsal leg elastic member are located on the ventral region side of the central portion of the inseam region with respect to the lateral center line extending in the lateral direction that vertically divides the pants-type disposable diaper. It intersects at, and is fixed to the exterior body with an adhesive in the lateral direction from the intersecting part.
In the central portion of the crotch region, the angle between the side edges respectively along the longitudinal direction of the absorbent body and the back-side leg elastic member state, and are 30 degrees or more and 90 degrees or less,
In the unfolded and stretched state of the pants-type disposable diaper,
A pants-type disposable diaper in which the angle between the ventral leg elastic member and each of the side edges of the absorber along the vertical direction is 40 degrees or more and 90 degrees or less . 前記パンツ型使い捨ておむつの展開且つ伸長状態において、
前記外装体の前記股下領域は、前記腹側レッグ弾性部材と前記背側レッグ弾性部材とが交差している部分どうしの間に、該腹側レッグ弾性部材及び該背側レッグ弾性部材が収縮力を発現する状態では配されていない部分を有する、請求項１に記載のパンツ型使い捨ておむつ。 In the unfolded and stretched state of the pants-type disposable diaper,
In the inseam region of the exterior body, the ventral leg elastic member and the dorsal leg elastic member have a contraction force between the portions where the ventral leg elastic member and the dorsal leg elastic member intersect. The pants-type disposable diaper according to claim 1, which has a portion that is not arranged in a state of expressing. 前記腹側レッグ弾性部材及び前記背側レッグ弾性部材は、その太さが３１０ｄｔｅｘ以上６２０ｄｔｅｘ以下である、請求項１又は２に記載のパンツ型使い捨ておむつ。 The pants-type disposable diaper according to claim 1 or 2 , wherein the ventral leg elastic member and the dorsal leg elastic member have a thickness of 310 dtex or more and 620 dtex or less. 着用者の前後方向に相当する縦方向とこれに直交する横方向とを有し、該着用者の腹側に配される腹側領域、股間部に配される股下領域及び背側に配される背側領域に亘る外装体と、該外装体の肌対向面側に固定された吸収体を有する吸収性本体とを備え、前記腹側領域における前記外装体の両側縁部と前記背側領域における前記外装体の両側縁部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、It has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and is arranged in the ventral region arranged on the ventral side of the wearer, the inseam region arranged in the crotch portion, and the dorsal side. It includes an exterior body extending over the dorsal region and an absorbent body having an absorber fixed to the skin facing surface side of the exterior body, and both side edges of the exterior body and the dorsal region in the ventral region. A pants-type disposable diaper in which both side edges of the exterior body are joined to form a pair of side seals, a waist opening, and a pair of leg openings.
前記一対のレッグ開口部それぞれの開口周縁部に沿って配された腹側レッグ弾性部材及び背側レッグ弾性部材により一対のレッグギャザーが形成されており、A pair of leg gathers are formed by the ventral leg elastic member and the dorsal leg elastic member arranged along the peripheral edge of each of the pair of leg openings.
前記パンツ型使い捨ておむつの展開且つ伸長状態において、In the unfolded and stretched state of the pants-type disposable diaper,
前記腹側レッグ弾性部材は、前記外装体における前記腹側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の縦方向の中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記腹側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、The ventral leg elastic member is arranged in an extended state from the ventral region side of the exterior body along one of the leg openings, and is arranged laterally inward at the vertical center portion of the inseam region. Arranged in an extended state toward the outer body, and further arranged in an extended state along the other leg opening from the ventral region side of the exterior body, and laterally inward at the central portion of the inseam region. It is arranged in an extended state toward
前記背側レッグ弾性部材は、前記外装体における前記背側領域側から一方の前記レッグ開口部に沿って伸長状態で配され且つ前記股下領域の前記中央部にて横方向の内方に向かって伸長状態で配され、更に、該外装体における前記背側領域側から他方の前記レッグ開口部に沿って伸長状態で配され且つ該股下領域の該中央部にて横方向の内方に向かって伸長状態で配されており、The dorsal leg elastic member is arranged in an extended state from the dorsal region side of the exterior body along one of the leg openings, and is arranged laterally inward at the central portion of the inseam region. Arranged in an extended state, further arranged in an extended state along the other leg opening from the dorsal region side of the exterior body, and laterally inward at the central portion of the inseam region. Arranged in a stretched state,
前記腹側レッグ弾性部材と前記背側レッグ弾性部材とは、前記股下領域の前記中央部において、前記パンツ型使い捨ておむつを縦方向に二分する横方向に延びる横中心線よりも前記腹側領域側で交差しており、交差している部分から横方向の内方で接着剤により前記外装体に固定されており、The ventral leg elastic member and the dorsal leg elastic member are located on the ventral region side of the central portion of the inseam region with respect to the lateral center line extending in the lateral direction that vertically divides the pants-type disposable diaper. It intersects at, and is fixed to the exterior body with an adhesive in the lateral direction from the intersecting part.
前記股下領域の前記中央部において、前記背側レッグ弾性部材と前記吸収体の縦方向に沿う両側縁それぞれとのなす角が、３０度以上９０度以下であり、In the central portion of the inseam region, the angle formed by the dorsal leg elastic member and each of the side edges of the absorber along the vertical direction is 30 degrees or more and 90 degrees or less.
前記吸収体は、上部吸収層と、該上部吸収層よりも横方向に長い下部吸収層とを有する２層構造に形成されており、The absorber is formed in a two-layer structure having an upper absorption layer and a lower absorption layer that is longer in the lateral direction than the upper absorption layer.
前記下部吸収層は、該下部吸収層を貫通する側部非積繊部を有し、The lower absorption layer has a side non-stacked portion that penetrates the lower absorption layer.
前記側部非積繊部は、前記下部吸収層の横方向における両側部それぞれに形成されており、The side non-stacked fiber portions are formed on both side portions of the lower absorption layer in the lateral direction.
前記パンツ型使い捨ておむつの展開且つ伸長状態において、In the unfolded and stretched state of the pants-type disposable diaper,
前記腹側レッグ弾性部材及び前記背側レッグ弾性部材は、前記交差している部分から横方向の内方に、前記下部吸収層の各前記側部非積繊部と重なる位置まで延出している、パンツ型使い捨ておむつ。The ventral leg elastic member and the dorsal leg elastic member extend laterally inward from the intersecting portion to a position where they overlap with each of the side non-stacked portions of the lower absorption layer. , Pants-type disposable diapers.
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