JP7083489B2 - Disposable diapers - Google Patents

Disposable diapers Download PDF

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JP7083489B2
JP7083489B2 JP2018152783A JP2018152783A JP7083489B2 JP 7083489 B2 JP7083489 B2 JP 7083489B2 JP 2018152783 A JP2018152783 A JP 2018152783A JP 2018152783 A JP2018152783 A JP 2018152783A JP 7083489 B2 JP7083489 B2 JP 7083489B2
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inseam
width direction
base point
absorption core
disposable diaper
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JP2020025791A (en
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真衣香 ▲高▼橋
智 坂口
康弘 山中
拓巳 市原
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Uni Charm Corp
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Uni Charm Corp
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Description

本発明は、股下域に前後方向に延びる一対の股下伸縮部を有する使い捨ておむつに関する。 The present invention relates to a disposable diaper having a pair of inseam telescopic portions extending in the anterior-posterior direction in the inseam region.

股下域に前後方向に延びる一対の股下伸縮部を有する使い捨ておむつが知られている（例えば、特許文献１参照）。股下伸縮部は、吸収コアに重なる領域に配置されている。股下伸縮部が収縮することにより、股下域の吸収コアが身体側に引き上げられる。 Disposable diapers having a pair of inseam telescopic portions extending in the inseam region in the anterior-posterior direction are known (see, for example, Patent Document 1). The inseam stretch is located in the area that overlaps the absorption core. By contracting the inseam elastic part, the absorption core in the inseam area is pulled up toward the body.

また、特許文献１の吸収コアには、前後方向に延びる一対の溝状部が形成されている。溝状部は、吸収コアの変形基点となる。このように構成された使い捨ておむつは、装着時に、溝状部を基点に吸収コアが変形するとともに、股下伸縮部と重なる吸収コアが身体側に引き上げられる。 Further, the absorption core of Patent Document 1 is formed with a pair of groove-shaped portions extending in the front-rear direction. The groove-shaped portion serves as a deformation base point of the absorption core. In the disposable diaper configured in this way, when the disposable diaper is worn, the absorption core is deformed from the groove-shaped portion as a base point, and the absorption core overlapping the inseam expansion / contraction portion is pulled up toward the body.

特開２０１８－４７２号公報Japanese Unexamined Patent Publication No. 2018-472

しかし、上述の使い捨ておむつは、以下の問題があった。
使い捨ておむつは、着用者の臀部から腹部を覆うように装着される。使い捨ておむつが装着される身体の形状は、股間において最も狭く、股間から臀部に向かって幅方向の外側に膨らんでいる。特許文献１の使い捨ておむつでは、股下伸縮部の収縮によって引き上げられた吸収コアが着用者の股間に対して引き上げられる。しかし、股間から臀部に向かって股下伸縮部が前後方向に平行に延びているため、臀部に対しても股間と同じように吸収コアが引き上げられる。よって、臀部を覆うように吸収コアを配置できないことがあった。 However, the above-mentioned disposable diapers have the following problems.
Disposable diapers are worn from the wearer's buttocks to the abdomen. The shape of the body on which the disposable diaper is worn is the narrowest in the crotch and bulges outward in the width direction from the crotch to the buttocks. In the disposable diaper of Patent Document 1, the absorption core pulled up by the contraction of the inseam elastic portion is pulled up with respect to the crotch of the wearer. However, since the inseam expansion and contraction portion extends in parallel in the front-rear direction from the crotch to the buttocks, the absorption core is pulled up to the buttocks in the same manner as the crotch. Therefore, it may not be possible to arrange the absorption core so as to cover the buttocks.

また、テープ型の使い捨ておむつを装着する際は、後胴回り域に臀部を載せ、股下域側におむつを引っ張り、股下域及び前胴回り域によって身体を覆う。このとき、臀部に沿って吸収コアが変形しないと、着用者の股間に吸収コアが適切に収まらず、股間に対して吸収コアがフィットしないことがある。股間に対して吸収コアがフィットしないと、股間と使い捨ておむつの間に隙間が生じた状態でおむつが装着される。このように装着されると、腹部を覆う前胴回り域の前後方向の長さを十分に確保できず、前胴回り域によって腹部を適切に覆うことができないことがあった。 When wearing a tape-type disposable diaper, place the buttocks on the back waist area, pull the diaper toward the inseam area, and cover the body with the inseam area and front waist area. At this time, if the absorption core is not deformed along the buttocks, the absorption core may not fit properly in the crotch of the wearer, and the absorption core may not fit into the crotch. If the absorbent core does not fit into the crotch, the diaper will be worn with a gap between the crotch and the disposable diaper. When worn in this way, the anterior-posterior length of the anterior girth area covering the abdomen could not be sufficiently secured, and the abdomen could not be properly covered by the anterior girth area.

よって、身体の臀部及び股間に沿うように吸収コアを変形させ、着用者の身体を適切に覆うことができる使い捨ておむつが望まれる。 Therefore, a disposable diaper that can appropriately cover the wearer's body by deforming the absorbent core along the buttocks and crotch of the body is desired.

一態様に係る使い捨ておむつは、互いに直交する前後方向及び幅方向と、前胴回り域、後胴回り域、及び前記前胴回り域及び前記後胴回り域との間に配置された股下域と、少なくとも前記股下域に配置された吸収コアと、前記後胴回り域に配置されたファスニングテープと、を有する使い捨ておむつであって、前記股下域の前記吸収コアと重なる領域において、前記前後方向に延び、かつ前記幅方向に間隔を空けて配置された一対の股下伸縮部を有し、前記吸収コアには、前記股下伸縮部よりも後側において、前記後側に向かって前記幅方向の外側に向かって延び、かつ前記幅方向に間隔を空けて配置された一対の変形基点部が設けられている。 The disposable diaper according to one embodiment includes an anterior-posterior direction and a width direction orthogonal to each other, an anterior girth area, a rear girth area, an inseam area arranged between the anterior girth area and the rear girth area, and at least the inseam. A disposable diaper having an absorption core arranged in a region and a fastening tape arranged in the rear waist circumference region, extending in the anteroposterior direction and having the width in a region overlapping the absorption core in the inseam region. It has a pair of inseam telescopic portions spaced apart from each other in the direction, and the absorption core extends outward in the width direction toward the posterior side behind the inseam telescopic portion. Moreover, a pair of deformation base points are provided which are arranged at intervals in the width direction.

実施形態に係る使い捨ておむつの肌面側から見た平面図である。It is a top view seen from the skin surface side of the disposable diaper which concerns on embodiment. 実施形態に係る吸収コアの平面図である。It is a top view of the absorption core which concerns on embodiment. 図１に示す使い捨ておむつのＡ－Ａ断面に沿った模式断面図である。It is a schematic cross-sectional view along the AA cross section of the disposable diaper shown in FIG. 図１に示す使い捨ておむつのＢ－Ｂ断面に沿った模式断面図である。It is a schematic cross-sectional view along the BB cross section of the disposable diaper shown in FIG. 図１に示す使い捨ておむつのＣ－Ｃ断面に沿った模式断面図である。It is a schematic cross-sectional view along the CC cross section of the disposable diaper shown in FIG. 使い捨ておむつのＡ－Ａ断面における装着状態を模式的に示した図である。It is a figure which schematically showed the wearing state in the AA cross section of a disposable diaper. 使い捨ておむつのＢ－Ｂ断面における吸収体の変形態様を説明するための図である。It is a figure for demonstrating the deformation mode of the absorber in the BB cross section of a disposable diaper. 実施形態に係る使い捨ておむつの装着状態を模式的に示した図である。It is a figure which showed schematically the wearing state of the disposable diaper which concerns on embodiment. 変形例に係る変形基点部を有する吸収コアを示した図である。It is a figure which showed the absorption core which has the deformation base point part which concerns on the modification.

（１）実施形態の概要
本明細書及び添付図面の記載により、少なくとも以下の事項が明らかとなる。
一態様に係る使い捨ておむつは、互いに直交する前後方向及び幅方向と、前胴回り域、後胴回り域、及び前記前胴回り域及び前記後胴回り域との間に配置された股下域と、少なくとも前記股下域に配置された吸収コアと、前記後胴回り域に配置されたファスニングテープと、を有する使い捨ておむつであって、前記股下域の前記吸収コアと重なる領域において、前記前後方向に延び、かつ前記幅方向に間隔を空けて配置された一対の股下伸縮部を有し、前記吸収コアには、前記股下伸縮部よりも後側において、前記後側に向かって前記幅方向の外側に向かって延び、かつ前記幅方向に間隔を空けて配置された一対の変形基点部が設けられている。 (1) Outline of Embodiment At least the following matters will be clarified by the description of this specification and the accompanying drawings.
The disposable diaper according to one embodiment includes an anterior-posterior direction and a width direction orthogonal to each other, an anterior girth area, a rear girth area, an inseam area arranged between the anterior girth area and the rear girth area, and at least the inseam. A disposable diaper having an absorption core arranged in a region and a fastening tape arranged in the rear waist circumference region, extending in the anteroposterior direction and having the width in a region overlapping the absorption core in the inseam region. It has a pair of inseam telescopic portions spaced apart from each other in the direction, and the absorption core extends outward in the width direction toward the posterior side behind the inseam telescopic portion. Moreover, a pair of deformation base points are provided which are arranged at intervals in the width direction.

本態様によれば、使い捨ておむつの装着時に、後胴回り域に臀部を載せ、股下域側におむつを引っ張った際に、吸収コアは、後胴回り域から股下域に向かって幅方向の内側に延びる変形基点部を基点として変形する。吸収コアは、股下域側に向かって幅方向の長さが短くなるように変形し、股下域において一対の股下伸縮部の収縮によって身体側に凸状に変形する。よって、着用者の臀部に対して吸収コアを広い面積で覆いつつ、着用者の両足間の隙間に吸収コアをコンパクトに収めることができる。着用者の股間の適切な位置に使い捨ておむつを配置することにより、装着時に着用者の腹部を覆う位置まで前胴回り域を引っ張ることができる。テープ型の使い捨ておむつにおいて、着用者の身体を適切に覆うことができる。 According to this aspect, when the buttocks are placed on the rear waist area and the diaper is pulled toward the inseam area when the disposable diaper is worn, the absorption core extends inward in the width direction from the rear waist area toward the inseam area. Deformation Deforms with the base point as the base point. The absorption core is deformed so that the length in the width direction becomes shorter toward the inseam region, and is convexly deformed toward the body side by the contraction of the pair of inseam expansion and contraction portions in the inseam region. Therefore, it is possible to compactly fit the absorbent core in the gap between the wearer's feet while covering the absorbent core with a large area for the wearer's buttocks. By placing the disposable diaper in an appropriate position in the wearer's crotch, the anterior girth area can be pulled to a position that covers the wearer's abdomen when worn. The tape-type disposable diaper can properly cover the wearer's body.

好ましい一態様によれば、前記股下伸縮部の外側縁は、前記変形基点部の外側縁よりも前記幅方向の内側に配置されてよい。 According to a preferred embodiment, the outer edge of the inseam stretchable portion may be arranged inside the width direction with respect to the outer edge of the deformation base point portion.

本態様によれば、変形基点部を基点とした吸収コアの変形と、股下伸縮部による吸収コアの変形と、がより連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向の長さが短くなるように変形した吸収コアを、股下域において身体側に近づけてより配置し易くなる。 According to this aspect, the deformation of the absorption core with the deformation base point portion as the base point and the deformation of the absorption core due to the inseam expansion / contraction portion are more easily linked. Therefore, it becomes easier to arrange the absorption core deformed so that the length in the width direction becomes shorter from the rear waist circumference area toward the inseam area side closer to the body side in the inseam area.

好ましい一態様によれば、前記変形基点部の少なくとも一部は、前記股下伸縮部の後端縁から後側に延びる第１延長線上に配置されてよい。 According to a preferred embodiment, at least a part of the deformation base point portion may be arranged on a first extension line extending rearward from the rear end edge of the inseam expansion / contraction portion.

本態様によれば、変形基点部を基点とした吸収コアの変形と、股下伸縮部による吸収コアの変形と、がより連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向の長さが短くなるように変形した吸収コアを、股下域において身体側に近づけてより配置し易くなる。 According to this aspect, the deformation of the absorption core with the deformation base point portion as the base point and the deformation of the absorption core due to the inseam expansion / contraction portion are more easily linked. Therefore, it becomes easier to arrange the absorption core deformed so that the length in the width direction becomes shorter from the rear waist circumference area toward the inseam area side closer to the body side in the inseam area.

好ましい一態様によれば、ファスニングテープは、前記前胴回り域に係合する係合部を有し、前記変形基点部は、前記使い捨ておむつの前記前後方向の中心と前記係合部の前端縁との前記前後方向の中間に位置する第１中間線を前記前後方向に跨がってよい。 According to a preferred embodiment, the fastening tape has an engaging portion that engages the anterior girth region, and the deformation base point portion is a center of the disposable diaper in the anteroposterior direction and a front end edge of the engaging portion. The first intermediate line located in the middle of the front-rear direction may be straddled in the front-rear direction.

本態様によれば、第１中間線よりも後側は、装着時に臀部が載せられる領域である。変形基点部は、第１中間線を前後方向に跨がっており、着用者の臀部が載せられる領域から臀部が載せられない領域にかけて配置される。装着時に、第１中間線よりも後側の領域が臀部によって押さえられた状態で、臀部が載せられていない領域が前側に引っ張られ、変形基点部を基点として吸収コアがより変形し易くなる。 According to this aspect, the area behind the first intermediate line is the area on which the buttocks are placed when worn. The deformation base point portion straddles the first intermediate line in the front-rear direction, and is arranged from the area where the buttocks of the wearer are placed to the area where the buttocks cannot be placed. At the time of mounting, the region on the rear side of the first intermediate line is pressed by the buttocks, and the region on which the buttocks are not placed is pulled to the front side, and the absorption core is more easily deformed with the deformation base point as the base point.

好ましい一態様によれば、前記変形基点部の前端縁は、前記変形基点部の後端縁と前記股下伸縮部の後端縁との前記前後方向の中間に位置する第２中間線よりも前側に配置されてよい。 According to a preferred embodiment, the front end edge of the deformation base point portion is anterior to the second intermediate line located between the rear end edge of the deformation base point portion and the rear end edge of the inseam expansion / contraction portion in the anteroposterior direction. May be placed in.

本態様によれば、変形基点部の後端縁と股下伸縮部の後端縁の間の領域のうち、半分以上の領域に亘って変形基点部が設けられている。よって、変形基点部を基点とした吸収コアの変形と、股下伸縮部による吸収コアの変形と、が連動しやすい。よって、後胴回り域から股下域にかけて吸収コアを身体に沿った形状に変形させ易くなり、臀部を覆いつつ股下域にコンパクトに吸収コアを配置することができる。 According to this aspect, the deformation base point portion is provided over a region of more than half of the region between the rear end edge of the deformation base point portion and the rear end edge of the inseam expansion / contraction portion. Therefore, the deformation of the absorption core with the deformation base point portion as the base point and the deformation of the absorption core due to the inseam expansion / contraction portion are likely to be linked. Therefore, the absorption core can be easily deformed into a shape along the body from the rear waist circumference area to the inseam area, and the absorption core can be compactly arranged in the inseam area while covering the buttocks.

好ましい一態様によれば、前記一対の変形基点部の間には、前記変形基点部よりも前記幅方向の外側の領域よりも剛性が高い高剛性部が設けられてよい。 According to a preferred embodiment, a high-rigidity portion having higher rigidity than the region outside the deformation base point portion in the width direction may be provided between the pair of deformation base point portions.

本態様によれば、変形基点部間に高剛性部が設けられていることにより、変形基点部よりも幅方向の外側の領域と変形基点部よりも内側の領域との剛性差が生じ、変形基点部を基点として吸収コアがより変形し易くなる。よって、股下域側に向かって幅方向の長さが短くなるように吸収コアが変形し易くなり、着用者の股間に吸収コアをより収めやすくなる。着用者の股間の適切な位置に使い捨ておむつを配置し、着用者の身体を適切に覆うことができる。 According to this aspect, since the high rigidity portion is provided between the deformation base points, the rigidity difference between the region outside the width direction from the deformation base point portion and the region inside the deformation base point portion is generated, and the deformation occurs. The absorption core is more easily deformed with the base point as the base point. Therefore, the absorption core is easily deformed so that the length in the width direction becomes shorter toward the inseam region side, and it becomes easier to fit the absorption core in the crotch of the wearer. Disposable diapers can be placed appropriately in the wearer's crotch to properly cover the wearer's body.

好ましい一態様によれば、前記変形基点部は、前記高剛性部と前記幅方向において隣接してよい。 According to a preferred embodiment, the deformation base point portion may be adjacent to the high rigidity portion in the width direction.

本態様によれば、変形基点部よりも幅方向の外側の領域が、変形基点部間の領域に対して変形し易くなり、剛性差によって吸収コアがより変形し易くなる。 According to this aspect, the region outside the deformation base point portion in the width direction is easily deformed with respect to the region between the deformation base points, and the absorption core is more easily deformed due to the difference in rigidity.

好ましい一態様によれば、前記変形基点部は、前記吸収コアが厚さ方向に圧縮された圧搾部によって構成されてよい。 According to a preferred embodiment, the deformation base point portion may be composed of a compression portion in which the absorption core is compressed in the thickness direction.

本態様によれば、圧搾部からなる変形基点部は、剛性が高く、吸収コアの変形をより安定し易くなる。 According to this aspect, the deformation base point portion composed of the squeezed portion has high rigidity, and the deformation of the absorption core becomes more stable.

好ましい一態様によれば、前記一対の変形基点部は、前記使い捨ておむつの前記幅方向の中心を挟んで配置されており、前記変形基点部の少なくとも一部は、前記吸収コアの前記幅方向の中心と前記吸収コアの最大幅との中間に位置する第３中間線よりも前記幅方向の外側に配置されてよい。 According to a preferred embodiment, the pair of deformation base points are arranged so as to sandwich the center of the disposable diaper in the width direction, and at least a part of the deformation base points is in the width direction of the absorption core. It may be arranged outside the width direction from the third intermediate line located between the center and the maximum width of the absorption core.

本態様によれば、吸収コアの幅方向の半分以上の領域において、吸収コアが変形基点部を基点に変形し易くなる。吸収コアの広い範囲で股下域側に向かって幅方向の長さが短くなるように吸収コアが変形し易くなり、着用者の股間に吸収コアをより収めやすくなる。 According to this aspect, in the region of half or more in the width direction of the absorption core, the absorption core is easily deformed with the deformation base point portion as the base point. The absorption core is easily deformed so that the length in the width direction becomes shorter toward the inseam region in a wide range of the absorption core, and it becomes easier to fit the absorption core in the crotch of the wearer.

好ましい一態様によれば、前記吸収コアよりも前記幅方向の外側において前記前後方向に伸縮する脚回り伸縮部を有し、前記脚回り伸縮部は、前記変形基点部から前記幅方向の外側に延びる第２延長線上に配置されてよい。 According to a preferred embodiment, the leg rotation expansion / contraction portion is provided outside the absorption core in the width direction and expands / contracts in the front-rear direction, and the leg rotation expansion / contraction portion is outward from the deformation base point portion in the width direction. It may be arranged on the extending second extension line.

本態様によれば、後胴回り域に臀部を載せ、股下域側におむつを引っ張る際に、後胴回り域が臀部によって押さえられるとともに、吸収コアよりも幅方向の外側の領域が脚に密着する。脚回り伸縮部と臀部とが身体にフィットした状態で吸収コアが変形するため、吸収コアが変形基点部を基点としてより変形し易くなる。 According to this aspect, when the buttocks are placed on the back waist area and the diaper is pulled toward the inseam area, the back waist area is pressed by the buttocks and the area outside the absorption core in the width direction is in close contact with the legs. Since the absorption core is deformed in a state where the elastic portion around the legs and the buttocks are fitted to the body, the absorption core is more easily deformed with the deformation base point as the base point.

好ましい一態様によれば、前記脚回り伸縮部は、前記後側に向かって前記幅方向の外側に向かって延びよい。 According to a preferred embodiment, the leg-rotating stretchable portion may extend outward in the width direction toward the rear side.

本態様によれば、後側に向かって幅方向の外側に向かって延びる脚回り伸縮部が身体に密着することにより、着用者の臀部を使い捨ておむつで覆うことができる。後側に向かって広い範囲で臀部を覆った状態で、股下域に向けて吸収コアの幅方向の長さが短くなるように吸収コアを変形できる。着用者の股間に吸収コアを適切に収めつつ、使い捨ておむつによって身体全体を覆い、漏れを抑制できる。 According to this aspect, the buttocks of the wearer can be covered with a disposable diaper by the leg-rotating elastic portion extending outward in the width direction toward the rear side in close contact with the body. With the buttocks covered over a wide area toward the rear side, the absorption core can be deformed so that the length in the width direction of the absorption core becomes shorter toward the inseam area. Disposable diapers can cover the entire body and prevent leaks, while properly accommodating the absorbent core in the wearer's crotch.

好ましい一態様によれば、前記使い捨ておむつの外側部は、前記後側に向かって前記幅方向の外側に向かって延びるサイドフラップ部を有し、前記サイドフラップ部は、前記変形基点部から前記幅方向に沿って延びる第２延長線上に配置されてよい。 According to a preferred embodiment, the outer portion of the disposable diaper has a side flap portion extending outward in the width direction toward the rear side, and the side flap portion has the width from the deformation base point portion. It may be arranged on a second extension line extending along the direction.

本態様によれば、後胴回り域に臀部を載せ、股下域側におむつを引っ張る際に、後胴回り域が臀部によって押さえられるとともに、吸収コアよりも幅方向の外側のサイドフラップが脚に当たり易くなる。よって、吸収コアは、幅方向の外側に位置するサイドフラップ部と、臀部が載せられた領域と、が押さえられた状態で変形し、変形基点部を基点としてより変形し易くなる。 According to this aspect, when the buttocks are placed on the rear waist area and the diaper is pulled toward the inseam area, the rear waist area is pressed by the buttocks, and the side flaps on the outer side in the width direction from the absorption core are more likely to hit the legs. .. Therefore, the absorption core is deformed in a state where the side flap portion located on the outer side in the width direction and the region on which the buttocks are placed are held down, and the absorption core is more easily deformed with the deformation base point portion as the base point.

好ましい一態様によれば、股下伸縮部は、前記変形基点部に沿い、かつ前記変形基点部の前端縁から前側に延びる第３延長線上に配置されてよい。 According to a preferred embodiment, the inseam stretchable portion may be arranged along the deformation base point portion and on a third extension line extending forward from the front end edge of the deformation base point portion.

本態様によれば、変形基点部を基点とした吸収コアの変形と、股下伸縮部による吸収コアの変形と、が連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向の長さが短くなるように変形した吸収コアを、股下域において身体側に近づけてより配置し易くなる。 According to this aspect, the deformation of the absorption core with the deformation base point portion as the base point and the deformation of the absorption core due to the inseam expansion / contraction portion are easily linked. Therefore, it becomes easier to arrange the absorption core deformed so that the length in the width direction becomes shorter from the rear waist circumference area toward the inseam area side closer to the body side in the inseam area.

（２）使い捨ておむつの全体概略構成
以下、図面を参照して、実施形態に係る使い捨ておむつについて説明する。なお、以下の図面の記載において、同一又は類似の部分には、同一又は類似の符号を付している。ただし、図面は模式的なものであり、各寸法の比率等は現実のものとは異なることに留意すべきである。したがって、具体的な寸法等は、以下の説明を参酌して判断すべきである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれ得る。 (2) Overall Outline of Disposable Diaper The disposable diaper according to the embodiment will be described below with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one. Therefore, the specific dimensions, etc. should be determined in consideration of the following explanation. In addition, there may be a portion where the relationship and ratio of the dimensions of the drawings are different from each other.

使い捨ておむつは、テープ型の使い捨ておむつである。図１は、本実施形態に係る使い捨ておむつ１０の肌面側から見た平面図であり、図２は、実施形態に係る吸収コアを肌面側から見た平面図である。図１及び図２に示す平面図は、伸長状態の使い捨ておむつを示している。図３は、図１に示す使い捨ておむつのＡ－Ａ断面に沿った模式断面図である。図４は、図１に示す使い捨ておむつのＢ－Ｂ断面に沿った模式断面図である。図５は、図１に示す使い捨ておむつのＣ－Ｃ断面に沿った模式断面図である。なお、本発明における伸長状態とは、使い捨ておむつ１０を皺が形成されない状態まで伸長させた状態である。また、本発明における自然状態とは、パッケージに収容されている使い捨ておむつ１０にあっては、パッケージから使い捨ておむつ１０を取り出し、２０℃±２℃、相対湿度６０％±５％ＲＨの雰囲気下において２４時間放置した状態である。 Disposable diapers are tape-type disposable diapers. FIG. 1 is a plan view of the disposable diaper 10 according to the present embodiment as viewed from the skin surface side, and FIG. 2 is a plan view of the absorption core according to the embodiment as viewed from the skin surface side. The plan views shown in FIGS. 1 and 2 show a disposable diaper in an extended state. FIG. 3 is a schematic cross-sectional view taken along the AA cross section of the disposable diaper shown in FIG. FIG. 4 is a schematic cross-sectional view taken along the BB cross section of the disposable diaper shown in FIG. FIG. 5 is a schematic cross-sectional view taken along the CC cross section of the disposable diaper shown in FIG. The stretched state in the present invention is a state in which the disposable diaper 10 is stretched to a state in which wrinkles are not formed. Further, the natural state in the present invention means that, in the case of the disposable diaper 10 housed in the package, the disposable diaper 10 is taken out from the package and placed in an atmosphere of 20 ° C. ± 2 ° C. and a relative humidity of 60% ± 5% RH. It has been left for 24 hours.

使い捨ておむつ１０は、互いに直交する前後方向Ｌ及び幅方向Ｗを有する。前後方向Ｌは、身体前側と身体後側とに延びる方向によって規定される。言い換えると、前後方向Ｌは、展開された使い捨ておむつ１０において前後に延びる方向である。また、使い捨ておむつ１０は、前後方向Ｌと幅方向Ｗの両方の直交する厚さ方向Ｔを有する。厚さ方向Ｔは、着用者側に向かう肌面側Ｔ１と、肌面側と反対側の非肌面側Ｔ２と、に延びる。 The disposable diaper 10 has an anteroposterior direction L and a width direction W orthogonal to each other. The anterior-posterior direction L is defined by the direction extending to the anterior side and the posterior side of the body. In other words, the anteroposterior direction L is a direction extending anterior-posteriorly in the deployed disposable diaper 10. Further, the disposable diaper 10 has both the front-rear direction L and the width direction W orthogonal to each other in the thickness direction T. The thickness direction T extends to the skin surface side T1 facing the wearer side and the non-skin surface side T2 opposite to the skin surface side.

使い捨ておむつ１０は、前胴回り域Ｓ１と、後胴回り域Ｓ２と、股下域Ｓ３と、を有する。前胴回り域Ｓ１は、着用者の前胴回り（腹部）に対向する領域である。後胴回り域Ｓ２は、着用者の後胴回り（背部）に対向する領域であり、装着時に身体（臀部）が載せられる領域を含む。股下域Ｓ３は、着用者の股下に位置し、前胴回り域Ｓ１と後胴回り域Ｓ２との間に配置された領域である。股下域Ｓ３は、着用者の脚回りに配置される脚回り開口部が設けられた領域である。脚回り開口部は、使い捨ておむつの外側縁から幅方向の内側に凹む部分である。 The disposable diaper 10 has a front waist circumference area S1, a rear waist circumference area S2, and an inseam area S3. The front waist circumference area S1 is a region facing the front waist circumference (abdomen) of the wearer. The rear waist circumference area S2 is a region facing the rear waist circumference (back) of the wearer, and includes a region on which the body (buttocks) is placed when worn. The inseam area S3 is located in the inseam of the wearer and is an area arranged between the front waist area S1 and the rear waist area S2. The inseam area S3 is an area provided with a leg circumference opening arranged around the wearer's leg circumference. The leg circumference opening is a portion recessed inward in the width direction from the outer edge of the disposable diaper.

使い捨ておむつ１０は、吸収材料を含む吸収コア３１を含む。吸収コア３１は、粉砕パルプもしくは高吸収性ポリマー（ＳＡＰ）、又はこれらの混合物等の吸収材料を含む。吸収コア３１は、コアラップ３２によって覆われてよい。吸収コア３１とコアラップ３２によって吸収体３０が構成されてよい。コアラップ３２は、テッシュによって構成され、吸収コア３１の肌面側Ｔ１と吸収コアの非肌面側に配置されてよい。 The disposable diaper 10 includes an absorbent core 31 containing an absorbent material. The absorbent core 31 contains an absorbent material such as ground pulp or a highly absorbent polymer (SAP), or a mixture thereof. The absorption core 31 may be covered by a core wrap 32. The absorber 30 may be composed of the absorption core 31 and the core wrap 32. The core wrap 32 is composed of a tissue and may be arranged on the skin surface side T1 of the absorption core 31 and the non-skin surface side of the absorption core.

図１及び図３に示すように、吸収コア３１を含む吸収体３０の肌面側Ｔ１には、表面シート２１及びサイドシート２２が設けられてよい。表面シート２１は、吸収体３０の幅方向Ｗの中心を跨いで配置されてよい。サイドシート２２は、表面シート２１の外側部を覆うように配置されてよい。表面シート２１及びサイドシート２２は、例えば不織布や開孔プラスチックフィルムのような透液性シートによって構成されていてよい。サイドシート２２の内側部は、折り返されて重なってよい。重なったサイドシート２２間には、前後方向Ｌに伸縮する防漏伸縮部４３が設けられてよい。防漏伸縮部４３は、前後方向Ｌに伸縮する糸ゴムによって構成されてよい。サイドシート２２と防漏伸縮部４３は、着用時に肌面側Ｔ１に起立する防漏ギャザー６０を構成する。 As shown in FIGS. 1 and 3, a surface sheet 21 and a side sheet 22 may be provided on the skin surface side T1 of the absorber 30 including the absorption core 31. The surface sheet 21 may be arranged so as to straddle the center of the absorber 30 in the width direction W. The side sheet 22 may be arranged so as to cover the outer side portion of the surface sheet 21. The surface sheet 21 and the side sheet 22 may be made of a liquid-permeable sheet such as a non-woven fabric or a perforated plastic film. The inner portions of the side seats 22 may be folded back and overlapped. A leak-proof expansion / contraction portion 43 that expands / contracts in the front-rear direction L may be provided between the overlapping side sheets 22. The leak-proof expansion / contraction portion 43 may be composed of a thread rubber that expands / contracts in the front-rear direction L. The side sheet 22 and the leak-proof expansion / contraction portion 43 form a leak-proof gather 60 that stands up on the skin surface side T1 when worn.

吸収体３０の非肌面側Ｔ２には、裏面シート２３及び外装シート２４が設けられてよい。外装シート２４は、裏面シート２３の非肌面側Ｔ２に設けられてよい。裏面シート２３の幅方向Ｗの長さは、外装シート２４の幅方向Ｗの長さよりも短く、裏面シート２３の前後方向Ｌの長さは、外装シート２４の前後方向Ｌの長さよりも短い。裏面シート２３は、液不透過性のフィルムによって構成されてよい。外装シート２４は、液透過性の不織布によって構成されてよい。 The back surface sheet 23 and the exterior sheet 24 may be provided on the non-skin surface side T2 of the absorber 30. The exterior sheet 24 may be provided on the non-skin surface side T2 of the back surface sheet 23. The length of the back surface sheet 23 in the width direction W is shorter than the length of the exterior sheet 24 in the width direction W, and the length of the back surface sheet 23 in the front-rear direction L is shorter than the length of the exterior sheet 24 in the front-rear direction L. The back sheet 23 may be made of a liquid-impermeable film. The exterior sheet 24 may be made of a liquid-permeable non-woven fabric.

後胴回り域の外側部には、ファスニングテープ９１が設けられている。ファスニングテープ９１は、ベース部９２と係合部９３を有する。ベース部９２は、厚さ方向Ｔにおいて外装シート２４及びサイドシート２２の間に配置され、幅方向Ｗにおいて外装シート２４及びサイドシート２２から外側に延出している。係合部９３は、ベース部９２上に配置されており、ターゲット部９５（図５参照）に係合する。ターゲット部９５は、前胴回り域Ｓ１において幅方向に間隔を空けて配置されており、ファスニングテープ９１がそれぞれ止着するように構成されている。 A fastening tape 91 is provided on the outer side of the rear waist circumference region. The fastening tape 91 has a base portion 92 and an engaging portion 93. The base portion 92 is arranged between the exterior sheet 24 and the side sheet 22 in the thickness direction T, and extends outward from the exterior sheet 24 and the side sheet 22 in the width direction W. The engaging portion 93 is arranged on the base portion 92 and engages with the target portion 95 (see FIG. 5). The target portions 95 are arranged at intervals in the width direction in the front waist circumference region S1, and are configured so that the fastening tapes 91 are attached to each other.

裏面シート２３と吸収体３０の間には、インジケータ５１が配置されてよい。インジケータ５１は、前後方向Ｌに延び、かつ幅方向Ｗに間隔を空けて配置されてよい。インジケータ５１は、後述する低坪量部３３の間に配置されている。インジケータ５１は、吸収体が体液を吸収することによって変色し、使い捨ておむつ１０の非肌面側Ｔ２から体液の吸収状態を把握できるように構成されている。 An indicator 51 may be arranged between the back sheet 23 and the absorber 30. The indicator 51 may extend in the front-rear direction L and may be arranged at intervals in the width direction W. The indicator 51 is arranged between the low basis weight portions 33, which will be described later. The indicator 51 is configured so that the absorber discolors when it absorbs the body fluid, and the absorption state of the body fluid can be grasped from the non-skin surface side T2 of the disposable diaper 10.

使い捨ておむつ１０は、吸収コア３１よりも幅方向の外側において前後方向に伸縮する脚回り伸縮部４２を有してよい。脚回り伸縮部４２は、サイドシート２２と裏面シート２３の間、及びサイドシート２２と外装シート２４の間に設けられてよい。脚回り伸縮部４２は、前後方向Ｌに伸縮する帯状の伸縮シートによって構成されている。脚回り伸縮部４２の収縮によって、着用時に使い捨ておむつ１０の脚回り開口部が脚回りにフィットする。 The disposable diaper 10 may have a leg circumference expansion / contraction portion 42 that expands / contracts in the front-rear direction on the outer side in the width direction from the absorption core 31. The leg circumference expansion / contraction portion 42 may be provided between the side sheet 22 and the back surface sheet 23, and between the side sheet 22 and the exterior sheet 24. The leg circumference expansion / contraction portion 42 is composed of a band-shaped expansion / contraction sheet that expands / contracts in the front-rear direction L. Due to the contraction of the leg circumference expansion / contraction portion 42, the leg circumference opening of the disposable diaper 10 fits around the leg circumference when worn.

使い捨ておむつ１０は、使い捨ておむつの後端縁に沿って幅方向Ｗに延びる腰回り伸縮部４５を有してよい。腰回り伸縮部４５は、裏面シート２３と外装シート２４の間、表面シート２１と外装シート２４の間、及びサイドシート２２と外装シート２４の間に設けられてよい。腰回り伸縮部４５の後端縁は、使い捨ておむつの後端縁よりも前側に位置し、腰回り伸縮部４５の前端縁は、吸収コア３１の後端縁よりも前側に位置してよい。腰回り伸縮部４５は、吸収コア３１よりも幅方向Ｗの外側に延出してよい。腰回り伸縮部４５は、幅方向Ｗに伸縮する帯状の伸縮シートによって構成されている。 The disposable diaper 10 may have a waist elastic portion 45 extending in the width direction W along the trailing edge of the disposable diaper. The waist elastic portion 45 may be provided between the back surface sheet 23 and the exterior sheet 24, between the front surface sheet 21 and the exterior sheet 24, and between the side sheet 22 and the exterior sheet 24. The posterior edge of the hip stretch 45 may be located anterior to the posterior edge of the disposable diaper, and the front edge of the waist stretch 45 may be located anterior to the posterior edge of the absorption core 31. The waist elastic portion 45 may extend outward in the width direction W from the absorption core 31. The waist elastic portion 45 is composed of a band-shaped elastic sheet that expands and contracts in the width direction W.

使い捨ておむつ１０は、股下域の吸収コア３１に重なる領域に設けられた一対の股下伸縮部４１を有してよい。股下伸縮部４１は、吸収コア３１よりも非肌面側に配置されている。股下伸縮部４１は、裏面シート２３と外装シート２４の間に設けられてよい。股下伸縮部４１は、前後方向Ｌに延び、かつ幅方向Ｗに間隔を空けて配置されている。股下伸縮部４１は、吸収コア３１の幅方向Ｗの中心に配置されてなく、吸収コア３１の幅方向Ｗの中心に対する両側にそれぞれ２本ずつ配置されている。よって、股下伸縮部４１の収縮によって、股下伸縮部４１と重なる領域の吸収コアが、吸収コアの幅方向の中心よりも身体側に引き上げられる。一対の股下伸縮部４１は、吸収コア３１の外側縁よりも幅方向の内側に位置してよい。一対の股下伸縮部４１間に位置する領域は、一対の股下伸縮部４１よりも幅方向の外側の領域に対して身体側に引き上げられる。よって、吸収コアの幅方向の中心が側部を基点として凸状に変形し、身体の股間に対するフィット性を確保できる。股下伸縮部４１は、前後方向Ｌに沿って配置された糸ゴムによって構成されている。なお、他の形態において、股下伸縮部４１は、前後方向に伸縮する帯状の伸縮シートによって構成されてよいし、１本の糸ゴムによって構成されていてもよいし、３本以上の糸ゴムによって構成されてもよい。また、本発明において重なっている状態とは、平面視にて一方の部材と他方の部材が重なっている状態であり、一方の部材の肌面側又は非肌面側に他方の部材が配置されている状態である。重なっている状態では、一方の部材と他方の部材が互いに接している状態のみならず、一方の部材と他方の部材の間に他の部材が介在している構成も含む。 The disposable diaper 10 may have a pair of inseam telescopic portions 41 provided in a region overlapping the absorption core 31 in the inseam region. The inseam expansion / contraction portion 41 is arranged on the non-skin surface side of the absorption core 31. The inseam expansion / contraction portion 41 may be provided between the back surface sheet 23 and the exterior sheet 24. The inseam expansion / contraction portion 41 extends in the front-rear direction L and is arranged at intervals in the width direction W. The inseam expansion / contraction portion 41 is not arranged at the center of the absorption core 31 in the width direction W, but is arranged on each side of the absorption core 31 with respect to the center of the width direction W. Therefore, due to the contraction of the inseam expansion / contraction portion 41, the absorption core in the region overlapping the inseam expansion / contraction portion 41 is pulled up toward the body side from the center in the width direction of the absorption core. The pair of inseam telescopic portions 41 may be located inside the outer edge of the absorption core 31 in the width direction. The region located between the pair of inseam telescopic portions 41 is pulled up toward the body with respect to the region outside the width direction of the pair of inseam telescopic portions 41. Therefore, the center in the width direction of the absorption core is deformed convexly with the side portion as the base point, and the fit to the crotch of the body can be ensured. The inseam expansion / contraction portion 41 is composed of thread rubber arranged along the front-rear direction L. In another form, the inseam expansion / contraction portion 41 may be composed of a band-shaped expansion / contraction sheet that expands / contracts in the front-rear direction, may be composed of one thread rubber, or may be composed of three or more thread rubbers. It may be configured. Further, in the present invention, the overlapping state is a state in which one member and the other member are overlapped in a plan view, and the other member is arranged on the skin surface side or the non-skin surface side of one member. It is in a state of being. The overlapping state includes not only a state in which one member and the other member are in contact with each other, but also a configuration in which another member is interposed between one member and the other member.

股下伸縮部４１は、使い捨ておむつの前後方向の中心１０ＬＣを跨がってよい。股下伸縮部４１の収縮によって、使い捨ておむつの前後方向の中心１０ＬＣを身体側に引き上げることができる。特に、使用前に使い捨ておむつの肌面側どうしが向き合うように二つに折り畳まれた形態にあっては、折り畳みによる折り癖を引き上げることができる。なお、他の形態において、股下伸縮部４１は、使い捨ておむつの前後方向の中心１０ＬＣを跨がってなく、中心１０ＬＣよりも前側のみに配置されていてもよいし、中心１０ＬＣよりも後側のみに配置されていてもよい。 The inseam telescopic portion 41 may straddle the center 10LC in the front-rear direction of the disposable diaper. By contracting the inseam telescopic portion 41, the center 10LC of the disposable diaper in the anteroposterior direction can be pulled up toward the body. In particular, if the disposable diaper is folded in two so that the skin sides of the disposable diaper face each other before use, the folding habit can be improved. In another form, the inseam telescopic portion 41 may be arranged only on the front side of the center 10LC without straddling the center 10LC in the front-back direction of the disposable diaper, or only on the rear side of the center 10LC. It may be arranged in.

股下伸縮部４１は、吸収コア３１の外側縁よりも幅方向Ｗの内側に位置する。吸収コア３１の股下伸縮部４１よりも幅方向Ｗの外側には、股下伸縮部４１の収縮力が作用し難い領域が設けられる。図３において、吸収コア３１において股下伸縮部４１よりも外側に位置するサイド領域Ｒ３１と、サイド領域Ｒ３１の間の中央領域Ｒ３２と、を示す。サイド領域Ｒ３１は、最も幅方向Ｗの外側に位置する股下伸縮部４１よりも幅方向Ｗの外側に位置する領域である。中央領域Ｒ３２は、股下伸縮部４１と重なる領域及び股下伸縮部４１よりも幅方向Ｗの内側に位置する領域を合わせた領域である。中央領域Ｒ３２は、股下伸縮部４１の収縮によって、サイド領域Ｒ３１に対して身体側に引き上げられる。着用時の吸収コア３１の変形態様については、後述にて詳細に説明する。 The inseam expansion / contraction portion 41 is located inside the width direction W with respect to the outer edge of the absorption core 31. A region where the contraction force of the inseam expansion / contraction portion 41 is difficult to act is provided on the outside of the inseam expansion / contraction portion 41 of the absorption core 31 in the width direction W. FIG. 3 shows a side region R31 located outside the inseam expansion / contraction portion 41 in the absorption core 31 and a central region R32 between the side regions R31. The side region R31 is a region located outside the width direction W with respect to the inseam expansion / contraction portion 41 located most outside the width direction W. The central region R32 is a region including a region overlapping the inseam expansion / contraction portion 41 and a region located inside the inseam expansion / contraction portion 41 in the width direction W. The central region R32 is pulled up toward the body with respect to the side region R31 by the contraction of the inseam expansion / contraction portion 41. The deformation mode of the absorption core 31 when worn will be described in detail later.

また、本発明における防漏伸縮部４３、脚回り伸縮部４２、腰回り伸縮部４５、及び股下伸縮部４１を含む伸縮部は、糸ゴムや伸縮性シートなどの弾性部材が伸縮可能な状態で配置された部分であり、伸縮しない状態で弾性部材が配置された部分を含まない。すなわち、伸縮部は、伸縮部を構成する弾性部材の有効長部分である。 Further, in the elastic portion including the leak-proof elastic portion 43, the leg circumference elastic portion 42, the waist elastic portion 45, and the inseam elastic portion 41 in the present invention, the elastic member such as the thread rubber or the elastic sheet can be expanded and contracted. It is an arranged part and does not include a part where an elastic member is arranged in a non-expandable state. That is, the stretchable portion is an effective length portion of the elastic member constituting the stretchable portion.

（３）吸収コアの構成
次いで、図２を参照し、吸収コア３１の構成について詳細に説明する。吸収コア３１は、吸収コア３１の最大幅３１Ｍよりも幅方向の長さが短い幅狭部３５と、幅狭部３５の前後方向の外側に配置された幅広部と、を有する。幅狭部３５は、前後に配置された幅広部の間に配置されている。幅狭部３５の幅方向の長さは、前後方向Ｌの外側に向かって長くなっている。吸収コア３１の平面視の形状は、砂時計形状である。なお、吸収コア３１のみならず、コアラップを含んだ吸収体の形状が、砂時計形状であってもよい。 (3) Configuration of Absorption Core Next, the configuration of the absorption core 31 will be described in detail with reference to FIG. 2. The absorption core 31 has a narrow portion 35 having a length shorter in the width direction than the maximum width 31M of the absorption core 31, and a wide portion arranged outside the narrow portion 35 in the front-rear direction. The narrow portion 35 is arranged between the wide portions arranged in the front-rear direction. The length of the narrow portion 35 in the width direction becomes longer toward the outside of the front-rear direction L. The shape of the absorption core 31 in a plan view is an hourglass shape. The shape of the absorber including the core wrap as well as the absorption core 31 may be an hourglass shape.

吸収コア３１は、周囲の領域よりも吸収材料の坪量が低い低坪量部３３を有してよい。低坪量部３３は、前後方向Ｌに沿って設けられている。低坪量部３３は、前後方向Ｌに延びていればよく、前後方向Ｌに対して平行であってもよいし、前後方向Ｌに対して９０度未満の角度で傾斜してもよい。 The absorption core 31 may have a low basis weight portion 33 in which the basis weight of the absorption material is lower than that of the surrounding area. The low basis weight portion 33 is provided along the front-rear direction L. The low basis weight portion 33 may extend in the front-rear direction L, may be parallel to the front-rear direction L, or may be inclined at an angle of less than 90 degrees with respect to the front-rear direction L.

低坪量部３３は、周囲の吸収コア３１よりも吸収材料の坪量が低い部分であり、周囲の吸収コア３１よりも厚さが薄く、かつ剛性が低い。よって、低坪量部３３は、装着状態で変形基点となり易い。吸収コア３１には、着用状態で前後方向に延びる変形基点が形成され易い。低坪量部３３は、吸収材料の坪量が実質的に零の部分（設計上の坪量が０であるが、周囲の吸収材料が混入した部分を含む）であってもよいし、周囲よりも少ない坪量の吸収材料が配置された部分であってもよい。低坪量部３３は、幅方向Ｗに一定の長さを有するスリットであってもよいし、幅方向Ｗの長さが実施的に零である切り込みであってもよい。各低坪量部３３の幅方向Ｗの長さは、２ｍｍ以上１０ｍｍ以下であってよく、より好適には、吸収コア３１の厚さ以上、８ｍｍ以下でよい。低坪量部３３の幅方向の長さが吸収コア３１の厚さ以上であることにより、低坪量部３３を基点に吸収コア３１が厚さ方向に変形し易くなる。また、低坪量部３３の幅方向の長さが８ｍｍ以下であることにより、低坪量部の幅方向の長さが長いことによる吸収性能に対する不安感を抑制できる低坪量部３３の前後方向Ｌの長さは、３０ｍｍ以上１８０ｍｍ以下であってよい。 The low basis weight portion 33 is a portion having a lower basis weight of the absorption material than the surrounding absorption core 31, is thinner than the surrounding absorption core 31, and has lower rigidity. Therefore, the low basis weight portion 33 tends to be a deformation base point in the mounted state. The absorption core 31 is likely to have a deformation base point extending in the front-rear direction when worn. The low basis weight portion 33 may be a portion where the basis weight of the absorbent material is substantially zero (the design basis weight is 0, but includes a portion where the surrounding absorbent material is mixed), or the periphery. It may be a portion where an absorbent material having a smaller basis weight is arranged. The low basis weight portion 33 may be a slit having a constant length in the width direction W, or may be a notch in which the length in the width direction W is practically zero. The length of each low basis weight portion 33 in the width direction W may be 2 mm or more and 10 mm or less, and more preferably, the thickness of the absorption core 31 or more and 8 mm or less. When the length of the low basis weight portion 33 in the width direction is equal to or larger than the thickness of the absorption core 31, the absorption core 31 is easily deformed in the thickness direction with the low basis weight portion 33 as the base point. Further, since the length of the low basis weight portion 33 in the width direction is 8 mm or less, the front and rear of the low basis weight portion 33 that can suppress anxiety about absorption performance due to the long length of the low basis weight portion in the width direction. The length of the direction L may be 30 mm or more and 180 mm or less.

低坪量部３３は、幅方向Ｗに間隔を空けて一対で配置されている。低坪量部３３は、使い捨ておむつの幅方向の中心１０ＷＣの両側に、幅方向Ｗに間隔を空けて配置されてよい。低坪量部３３の前後方向の中心は、使い捨ておむつの前後方向の中心１０ＬＣよりも後側に配置されてよい。低坪量部３３の前端縁３３Ｆは、股下伸縮部４１の前端縁４１Ｆよりも前側に位置してよく、低坪量部３３の後端縁３３Ｒは、股下伸縮部４１の後端縁４１Ｒと一致又は後端縁４１Ｒよりも前側に位置してよい。低坪量部３３の外側縁は、股下伸縮部４１を構成する糸ゴムのうち幅方向の外側に位置する糸ゴムと幅方向において一致していてよく、低坪量部３３の内側縁は、股下伸縮部４１を構成する糸ゴムのうち幅方向の内側に位置する糸ゴムと幅方向において一致していてよい。 The low basis weight portions 33 are arranged in pairs at intervals in the width direction W. The low basis weight portions 33 may be arranged on both sides of the center 10WC in the width direction of the disposable diaper at intervals in the width direction W. The center of the low basis weight portion 33 in the front-rear direction may be arranged behind the center 10LC in the front-back direction of the disposable diaper. The front end edge 33F of the low basis weight portion 33 may be located on the front side of the front end edge 41F of the inseam expansion / contraction portion 41, and the rear end edge 33R of the low basis weight portion 33 is the rear end edge 41R of the inseam expansion / contraction portion 41. It may be located anterior to the coincidence or trailing edge 41R. The outer edge of the low basis weight portion 33 may coincide with the thread rubber located outside in the width direction among the thread rubbers constituting the inseam expansion / contraction portion 41 in the width direction, and the inner edge of the low basis weight portion 33 may be aligned with the thread rubber. Of the thread rubbers constituting the inseam expansion / contraction portion 41, the thread rubber located inside in the width direction may coincide with the thread rubber in the width direction.

吸収コア３１は、周囲の領域よりも剛性が高い高剛性部７０を有してよい。高剛性部７０は、一対の股下伸縮部４１の間に配置された中央高剛性部７１と、股下伸縮部４１よりも後側に配置された後高剛性部７２と、股下伸縮部４１よりも前側に配置された前高剛性部７３と、を有してよい。中央高剛性部７１、後高剛性部７２及び前高剛性部７３は、それぞれ前後方向Ｌにおいて離間している。 The absorption core 31 may have a high-rigidity portion 70 having a higher rigidity than the surrounding region. The high-rigidity portion 70 includes a central high-rigidity portion 71 arranged between the pair of inseam expansion / contraction portions 41, a rear high-rigidity portion 72 arranged behind the inseam expansion / contraction portion 41, and an inseam expansion / contraction portion 41. It may have a front high-rigidity portion 73 arranged on the front side. The central high-rigidity portion 71, the rear high-rigidity portion 72, and the front high-rigidity portion 73 are separated from each other in the front-rear direction L.

高剛性部７０は、周囲の領域よりも曲げ剛性が高い領域である。高剛性部７０は、周囲の領域よりも目付が高い部分であってもよいし、吸収コア３１が厚さ方向に圧縮された部分であってもよい。本実施の形態の高剛性部７０は、吸収コア３１が圧縮された圧搾部が設けられた部分である。圧搾部は、少なくとも吸収コア３１を厚さ方向Ｔに圧搾することによって形成されていればよく、コアラップ３２等の他の部材と吸収コア３１とが圧搾されることによって形成されてもよい。 The high-rigidity portion 70 is a region having higher bending rigidity than the surrounding region. The high-rigidity portion 70 may be a portion having a higher basis weight than the surrounding region, or may be a portion where the absorption core 31 is compressed in the thickness direction. The high-rigidity portion 70 of the present embodiment is a portion provided with a compressed portion in which the absorption core 31 is compressed. The squeezed portion may be formed by squeezing at least the absorption core 31 in the thickness direction T, and may be formed by squeezing another member such as the core wrap 32 and the absorption core 31.

中央高剛性部７１は、一対の低坪量部３３間の領域に設けられている。中央高剛性部７１の前端縁７１Ｆは、低坪量部３３の前端縁３３Ｆと一致又は低坪量部３３の前端縁３３Ｆよりも後側に位置してよい。中央高剛性部７１の後端縁７１Ｒは、低坪量部３３の後端縁３３Ｒよりも前側に位置してよい。中央高剛性部７１の前後方向の中心は、低坪量部３３の前後方向中心よりも前側に配置されてよい。中央高剛性部７１は、幅方向Ｗにおいて、低坪量部３３と間隔を空けて配置されてよい。中央高剛性部７１は、使い捨ておむつの前後方向の中心１０ＬＣ及び使い捨ておむつの幅方向Ｗの中心１０ＷＣを跨がってよい。 The central high-rigidity portion 71 is provided in the region between the pair of low basis weight portions 33. The front end edge 71F of the central high-rigidity portion 71 may coincide with the front end edge 33F of the low basis weight portion 33 or may be located on the rear side of the front end edge 33F of the low basis weight portion 33. The rear end edge 71R of the central high-rigidity portion 71 may be located on the front side of the rear end edge 33R of the low basis weight portion 33. The center in the front-rear direction of the central high-rigidity portion 71 may be arranged in front of the center in the front-rear direction of the low basis weight portion 33. The central high-rigidity portion 71 may be arranged at a distance from the low basis weight portion 33 in the width direction W. The central high-rigidity portion 71 may straddle the center 10LC in the front-rear direction of the disposable diaper and the center 10WC in the width direction W of the disposable diaper.

股下伸縮部４１は、中央高剛性部７１の幅方向の中心よりも両側に位置し、中央高剛性部７１よりも後側に延出してよい。吸収コア３１は、中央高剛性部７１よりも後側において股下伸縮部４１が配置された第１領域Ｒ４１と、中央高剛性部７１と股下伸縮部４１が厚さ方向又は幅方向において重なった第２領域Ｒ４２と、股下伸縮部４１よりも前側において中央高剛性部７１が配置された第３領域Ｒ４３と、を有してよい。第１領域Ｒ４１と第２領域Ｒ４２は、前後方向Ｌにおいて隣接しており、第２領域Ｒ４２と第３領域Ｒ４３は、前後方向Ｌにおいて隣接している。第１領域Ｒ４１の後端縁は、股下伸縮部４１の後端縁４１Ｒと一致し、第１領域Ｒ４１の前端縁は、中央高剛性部７１の後端縁７１Ｒと一致する。第２領域Ｒ４２の後端縁は、第１領域Ｒ４１の前端縁と一致し、第２領域Ｒ４２の前端縁は、股下伸縮部４１の前端縁４１Ｆと一致する。第３領域Ｒ４３の後端縁は、第２領域Ｒ４２の前端縁と一致し、第３領域Ｒ４３の前端縁は、中央高剛性部７１の前端縁７１Ｆと一致する。 The inseam expansion / contraction portion 41 may be located on both sides of the center of the central high-rigidity portion 71 in the width direction, and may extend to the rear side of the central high-rigidity portion 71. In the absorption core 31, the first region R41 in which the inseam expansion / contraction portion 41 is arranged behind the central high-rigidity portion 71, and the central high-rigidity portion 71 and the inseam expansion / contraction portion 41 overlap each other in the thickness direction or the width direction. It may have two regions R42 and a third region R43 in which the central high-rigidity portion 71 is arranged on the front side of the inseam expansion / contraction portion 41. The first region R41 and the second region R42 are adjacent to each other in the front-rear direction L, and the second region R42 and the third region R43 are adjacent to each other in the front-rear direction L. The trailing edge of the first region R41 coincides with the trailing edge 41R of the inseam telescopic portion 41, and the front edge of the first region R41 coincides with the trailing edge 71R of the central high-rigidity portion 71. The trailing edge of the second region R42 coincides with the front edge of the first region R41, and the front edge of the second region R42 coincides with the front edge 41F of the inseam telescopic portion 41. The trailing edge of the third region R43 coincides with the front edge of the second region R42, and the front edge of the third region R43 coincides with the front edge 71F of the central high-rigidity portion 71.

後高剛性部７２は、低坪量部３３よりも後側に配置されてよい。後高剛性部７２の外側縁は、後側に向かって幅方向Ｗの外側に延びてよい。後高剛性部７２の前端縁の幅方向Ｗの長さは、中央高剛性部７１の幅方向Ｗの長さよりも長くてよい。後高剛性部７２は、使い捨ておむつの幅方向Ｗの中心１０ＷＣを跨がってよい。 The rear high rigidity portion 72 may be arranged on the rear side of the low basis weight portion 33. The outer edge of the rear high-rigidity portion 72 may extend outward in the width direction W toward the rear side. The length of the front end edge of the rear high-rigidity portion 72 in the width direction W may be longer than the length of the central high-rigidity portion 71 in the width direction W. The rear high-rigidity portion 72 may straddle the center 10WC of the width direction W of the disposable diaper.

前高剛性部７３は、低坪量部３３よりも前側に配置されてよい。前高剛性部７３は、使い捨ておむつの幅方向Ｗの中心１０ＷＣの両側に、幅方向Ｗに間隔を空けて配置されてよい。前高剛性部７３の前端縁は、幅方向Ｗの外側に向かって前側に延びてよい。 The front high-rigidity portion 73 may be arranged on the front side of the low basis weight portion 33. The front high-rigidity portions 73 may be arranged on both sides of the center 10WC of the width direction W of the disposable diaper at intervals in the width direction W. The front edge of the front high-rigidity portion 73 may extend forward toward the outside in the width direction W.

吸収コア３１には、股下伸縮部４１よりも後側に設けられた一対の変形基点部８５を有してよい。変形基点部８５は、股下伸縮部４１よりも後側において、後側に向かって幅方向Ｗの外側に向かって延び、かつ幅方向Ｗに間隔を空けて一対で配置されている。変形基点部８５は、吸収コア３１が厚さ方向に変形する基点となる。本実施の形態の変形基点部８５は、後高剛性部７２の外側部７２Ｓによって構成されている。変形基点部８５は、変形基点の縁となる基点縁８５Ｅを有する。基点縁は、吸収コア３１の厚さの折れ線が形成される縁である。本実施の形態の基点縁８５Ｅは、後高剛性部７２の外側縁７２Ｅである。本実施の形態の変形基点部８５は、基点縁８５Ｅから吸収コア３１の厚さ分まで基点縁８５Ｅに沿った線に対する垂直方向の内側に延びる領域を含んでいる。 The absorption core 31 may have a pair of deformation base points 85 provided behind the inseam expansion / contraction portion 41. The deformation base point portions 85 are arranged in pairs on the rear side of the inseam expansion / contraction portion 41 so as to extend toward the rear side toward the outside of the width direction W and at intervals in the width direction W. The deformation base point portion 85 serves as a base point at which the absorption core 31 is deformed in the thickness direction. The deformation base point portion 85 of the present embodiment is composed of the outer portion 72S of the rear high rigidity portion 72. The deformation base point portion 85 has a base point edge 85E which is an edge of the deformation base point. The base point edge is an edge on which a polygonal line having the thickness of the absorption core 31 is formed. The base point edge 85E of the present embodiment is the outer edge 72E of the rear high rigidity portion 72. The modified base point portion 85 of the present embodiment includes a region extending inward in the direction perpendicular to the line along the base point edge 85E from the base point edge 85E to the thickness of the absorption core 31.

ここで、本発明における外側部とは、幅方向Ｗにおける外側の縁を含む幅方向Ｗに一定の範囲を占める部分であり、外側縁とは、幅方向Ｗにおける外側の縁である。また、内側部とは、幅方向Ｗにおける内側の縁を含む幅方向Ｗに一定の範囲を占める部分であり、内側縁とは、幅方向Ｗにおける内側の縁である。なお、変形基点部８５は、吸収コア３１が厚さ方向に変形する基点となればよく、圧搾部による高剛性部の外側部に限定されない。他の態様における変形基点部については、後述にて説明する。 Here, the outer portion in the present invention is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. Further, the inner portion is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is an inner edge in the width direction W. The deformation base point portion 85 may be a base point at which the absorption core 31 is deformed in the thickness direction, and is not limited to the outer portion of the high-rigidity portion by the squeezing portion. The deformation base point portion in another embodiment will be described later.

（４）使い捨ておむつの装着時の変形態様
次いで、図６から図８に基づいて、使い捨ておむつ１０の装着時の変形態様について説明する。図６は、使い捨ておむつのＡ－Ａ断面における装着状態を模式的に示した図である。図７は、使い捨ておむつのＢ－Ｂ断面における装着時の吸収体の変形態様を説明するための図である。図８は、実施形態に係る使い捨ておむつの装着状態を模式的に示した図であり、寝た状態の着用者を正面側から視認した図である。図６に示すラインＢＬは、着用者の身体のラインを示している。 (4) Deformation mode when the disposable diaper is worn Next, a deformation mode when the disposable diaper 10 is worn will be described with reference to FIGS. 6 to 8. FIG. 6 is a diagram schematically showing a wearing state of a disposable diaper in the AA cross section. FIG. 7 is a diagram for explaining a deformation mode of the absorber at the time of wearing in the BB cross section of the disposable diaper. FIG. 8 is a diagram schematically showing a wearing state of a disposable diaper according to an embodiment, and is a view of a sleeping wearer visually recognized from the front side. The line BL shown in FIG. 6 shows the line of the wearer's body.

テープ型の使い捨ておむつ１０を装着する際は、まず、使い捨ておむつ１０を展開した状態で使い捨ておむつ１０の後胴回り域Ｓ２に着用者の臀部を載せる。そして、着用者の両脚の間に使い捨ておむつ１０を通し、股下域側におむつを引っ張り、股下域によって身体を覆う。このとき、使い捨ておむつは、前後方向に引っ張られ、吸収コア３１は、変形基点部８５を基点に変形し易い。変形基点部８５は、股下域に位置する股下伸縮部４１よりも後側に設けられており、股下伸縮部４１よりも後側に吸収コア３１の変形基点が形成される。変形基点部８５は、後側に向かって幅方向Ｗの外側に向かって延びており、吸収コア３１には、後胴回り域から股下域に向かって幅方向Ｗの内側に延びる変形基点が形成される。 When wearing the tape-type disposable diaper 10, first, the wearer's buttocks are placed on the rear waist circumference area S2 of the disposable diaper 10 with the disposable diaper 10 unfolded. Then, a disposable diaper 10 is passed between the wearer's legs, the diaper is pulled toward the inseam region, and the body is covered by the inseam region. At this time, the disposable diaper is pulled in the front-rear direction, and the absorption core 31 is easily deformed with the deformation base point portion 85 as the base point. The deformation base point portion 85 is provided on the rear side of the inseam expansion / contraction portion 41 located in the inseam region, and the deformation base point of the absorption core 31 is formed on the rear side of the inseam expansion / contraction portion 41. The deformation base point portion 85 extends toward the outside in the width direction W toward the rear side, and the absorption core 31 is formed with a deformation base point extending inward in the width direction W from the rear waist circumference region toward the inseam region. To.

よって、後胴回り域に臀部を載せ、股下域側におむつを引っ張った際に、吸収体は、後胴回り域から股下域に向かって幅方向Ｗの内側に延びる基点によって変形する。具体的には、変形基点部８５が設けられている領域の吸収体は、図７に示すように、後高剛性部７２の外側縁７２Ｅ（変形基点部８５の基点縁８５Ｅ）を基点として変形し、外側縁７２Ｅよりも幅方向Ｗの内側の領域が、外側縁７２Ｅよりも幅方向Ｗの外側の領域よりも肌面側に配置される。外側縁７２Ｅよりも幅方向Ｗの内側の領域が、外側縁７２Ｅよりも幅方向Ｗの外側の領域よりも肌面側に配置される要因としては、股下伸縮部４１の収縮によって吸収コア３１の幅方向Ｗの中央が身体側に引き上げられること、装着者がおむつを引っ張る際には一般的に吸収コア３１の幅方向Ｗの中央に力をかけるため、及び装着時に吸収性物品の外側部（例えば脚回り開口部近傍）が脚に引っ掛かった状態で吸収コア３１の幅方向Ｗの中央が引き上げられるためである。吸収コア３１は、変形基点部８５を基点に変形することにより、股下域側に向かって幅方向Ｗの長さが短くなるように変形する。 Therefore, when the buttocks are placed on the back waist area and the diaper is pulled toward the inseam area, the absorber is deformed by the base point extending inward in the width direction W from the rear waist area toward the inseam area. Specifically, as shown in FIG. 7, the absorber in the region where the deformation base point portion 85 is provided is deformed with the outer edge 72E of the rear high rigidity portion 72 (base point edge 85E of the deformation base point portion 85) as a base point. However, the region inside the width direction W from the outer edge 72E is arranged closer to the skin surface side than the region outside the width direction W than the outer edge 72E. The reason why the region inside the width direction W from the outer edge 72E is arranged on the skin surface side from the region outside the width direction W from the outer edge 72E is that the absorption core 31 is arranged due to the contraction of the inseam expansion / contraction portion 41. The center of the width direction W is pulled up toward the body, and when the wearer pulls the diaper, a force is generally applied to the center of the width direction W of the absorption core 31, and the outer part of the absorbent article (when worn). This is because the center of the absorption core 31 in the width direction W is pulled up while the leg circumference opening (near the leg circumference opening) is caught by the leg. By deforming the absorption core 31 with the deformation base point portion 85 as the base point, the absorption core 31 is deformed so that the length of the width direction W becomes shorter toward the inseam region side.

図６及び図８に示すように、変形基点部８５よりも前側に位置する吸収コア３１は、一対の股下伸縮部４１の収縮によって身体側に凸状に変形し、中央領域Ｒ３２がサイド領域Ｒ３１に対して立ち上がる。よって、股下域の吸収コア３１が身体側に沿って配置され、着用者の股間に吸収コア３１を適切に収めることができる。 As shown in FIGS. 6 and 8, the absorption core 31 located in front of the deformation base point 85 is deformed convexly toward the body due to the contraction of the pair of inseam expansion / contraction portions 41, and the central region R32 is the side region R31. Stand up against. Therefore, the absorption core 31 in the inseam region is arranged along the body side, and the absorption core 31 can be appropriately accommodated in the crotch of the wearer.

着用者の臀部に対して吸収コア３１を広い面積で覆いつつ、着用者の両足間の隙間に吸収コア３１をコンパクトに収めることができる。着用者の股間の適切な位置に使い捨ておむつを配置することにより、着用者の腹部を覆う位置まで前胴回り域を引っ張ることができる。テープ型の使い捨ておむつにおいて、着用者の身体を適切に覆うことができる。 The absorption core 31 can be compactly stored in the gap between the wearer's feet while covering the absorption core 31 with a large area for the wearer's buttocks. By placing the disposable diaper in an appropriate position in the wearer's crotch, the anterior girth area can be pulled to a position that covers the wearer's abdomen. The tape-type disposable diaper can properly cover the wearer's body.

股下伸縮部４１の外側縁は、変形基点部８５の外側縁よりも幅方向Ｗの外側に配置されてよい。しかし、より好適には、股下伸縮部４１の外側縁は、変形基点部８５の外側縁よりも幅方向Ｗの内側に配置されてよい。このような構成によれば、変形基点部８５を基点とした吸収コア３１の変形と、股下伸縮部４１による吸収コア３１の変形と、がより連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向Ｗの長さが短くなるように変形した吸収コア３１を、股下域において身体側に近づけてより配置し易くなる。なお、股下伸縮部４１の外側縁は、股下伸縮部４１を構成する弾性部材のうち最も幅方向Ｗの外側に位置する弾性部材の外側縁である。本実施の形態の股下伸縮部４１を構成する糸ゴムは、前後方向に沿って配置されており、幅方向Ｗの外側に位置する弾性部材が、股下伸縮部４１の外側縁を構成する。 The outer edge of the inseam telescopic portion 41 may be arranged outside the outer edge of the deformation base point portion 85 in the width direction W. However, more preferably, the outer edge of the inseam telescopic portion 41 may be arranged inside the width direction W with respect to the outer edge of the deformation base point portion 85. According to such a configuration, the deformation of the absorption core 31 with the deformation base point portion 85 as the base point and the deformation of the absorption core 31 by the inseam expansion / contraction portion 41 are more easily linked. Therefore, it becomes easier to arrange the absorption core 31 deformed so that the length of the width direction W becomes shorter from the rear waist circumference region toward the inseam region side closer to the body side in the inseam region. The outer edge of the inseam telescopic portion 41 is the outer edge of the elastic member located on the outermost side in the width direction W among the elastic members constituting the inseam telescopic portion 41. The thread rubber constituting the inseam expansion / contraction portion 41 of the present embodiment is arranged along the front-rear direction, and the elastic member located outside the width direction W constitutes the outer edge of the inseam expansion / contraction portion 41.

変形基点部８５と、股下伸縮部４１は、幅方向Ｗにずれていてもよい。しかし、より好適には、変形基点部８５の少なくとも一部は、股下伸縮部４１の後端縁から後側に延びる第１延長線ＥＬ１上に配置されてよい。変形基点部８５を基点とした吸収コア３１の変形と、股下伸縮部４１による吸収コア３１の変形と、がより連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向Ｗの長さが短くなるように変形した吸収コア３１を、股下域において身体側に近づけてより配置し易くなる。なお、股下伸縮部４１を構成する弾性部材が複数設けられた形態にあっては、少なくともいずれかの弾性部材の延長線上に変形基点部８５が配置されていればよい。 The deformation base point portion 85 and the inseam expansion / contraction portion 41 may be displaced in the width direction W. However, more preferably, at least a part of the deformation base point portion 85 may be arranged on the first extension line EL1 extending rearward from the rear end edge of the inseam expansion / contraction portion 41. The deformation of the absorption core 31 with the deformation base point portion 85 as the base point and the deformation of the absorption core 31 by the inseam expansion / contraction portion 41 are more easily linked. Therefore, it becomes easier to arrange the absorption core 31 deformed so that the length of the width direction W becomes shorter from the rear waist circumference region toward the inseam region side closer to the body side in the inseam region. In the form in which a plurality of elastic members constituting the inseam expansion / contraction portion 41 are provided, the deformation base point portion 85 may be arranged on an extension line of at least one of the elastic members.

変形基点部８５は、使い捨ておむつの前後方向の中心１０ＬＣと係合部９３の前端縁との前後方向Ｌの中間に位置する第１中間線ＭＬ１を前後方向Ｌに跨がってよい。図１に示すように、第１中間線ＭＬ１は、使い捨ておむつの前後方向の中心１０ＬＣと係合部９３の前端縁との前後方向の中心を通り、かつ幅方向Ｗに延びる線である。第１中間線ＭＬ１よりも後側は、一般的に装着時に臀部が載せられる領域である。変形基点部８５は、第１中間線ＭＬ１を前後方向に跨がっており、着用者の臀部が載せられる領域から臀部が載せられない領域にかけて配置される。装着時に、第１中間線ＭＬ１よりも後側の領域が臀部によって押さえられた状態で、臀部が載せられていない領域が前側に引っ張られ、変形基点部８５を基点として吸収コア３１がより変形し易い。よって、吸収コア３１の幅が短くなるように吸収コア３１を変形させ、着用者の股間の適切な位置に使い捨ておむつを配置し、着用者の身体を適切に覆うことができる。 The deformation base point portion 85 may straddle the first intermediate line ML1 located in the middle of the front-rear direction L between the center 10LC of the disposable diaper in the front-rear direction and the front end edge of the engaging portion 93 in the front-rear direction L. As shown in FIG. 1, the first intermediate line ML1 is a line that passes through the center 10LC in the front-rear direction of the disposable diaper and the front end edge of the engaging portion 93 in the front-rear direction and extends in the width direction W. The area behind the first intermediate line ML1 is generally the area on which the buttocks are placed when worn. The deformation base point portion 85 straddles the first intermediate line ML1 in the front-rear direction, and is arranged from the region where the buttocks of the wearer are placed to the region where the buttocks cannot be placed. At the time of mounting, the area behind the first intermediate line ML1 is pressed by the buttocks, the area where the buttocks are not placed is pulled to the front side, and the absorption core 31 is further deformed with the deformation base point 85 as the base point. easy. Therefore, the absorbent core 31 can be deformed so that the width of the absorbent core 31 is shortened, the disposable diaper can be placed at an appropriate position in the crotch of the wearer, and the wearer's body can be appropriately covered.

また、股下伸縮部４１の後端縁４１Ｒは、第１中間線ＭＬ１よりも前側に配置されてよい。股下伸縮部４１の後端縁４１Ｒは、着用者の臀部が載せられない領域に配置される。装着時には、第１中間線ＭＬ１よりも後側の領域が臀部によって押さえられた状態で、臀部が載せられていない領域が前側に引っ張られ、股下伸縮部４１がより伸長し易い。よって、股下伸縮部４１が配置された領域が身体に対してより引き上げられ易く、着用者の股間に吸収コア３１を適切により収めることができる。 Further, the rear end edge 41R of the inseam expansion / contraction portion 41 may be arranged on the front side of the first intermediate line ML1. The rear end edge 41R of the inseam telescopic portion 41 is arranged in an area where the wearer's buttocks cannot be placed. At the time of mounting, the region on the rear side of the first intermediate line ML1 is pressed by the buttocks, and the region on which the buttocks are not placed is pulled to the front side, and the inseam expansion / contraction portion 41 is more easily extended. Therefore, the area where the inseam expansion / contraction portion 41 is arranged is more easily pulled up with respect to the body, and the absorption core 31 can be appropriately accommodated in the crotch of the wearer.

変形基点部８５の前端縁は、変形基点部８５の後端縁と股下伸縮部４１の後端縁との前後方向の中間に位置する第２中間線ＭＬ２よりも前側に配置されてよい。図１に示すように、第２中間線ＭＬ２は、変形基点部８５の後端縁と股下伸縮部４１の後端縁４１Ｒとの前後方向の中間を通り、かつ幅方向Ｗに延びる線である。変形基点部８５の後端縁と股下伸縮部４１の後端縁の間の領域のうち、半分以上の領域に亘って変形基点部８５が設けられている。よって、変形基点部８５を基点とした吸収コア３１の変形と、股下伸縮部４１による吸収コア３１の変形と、が連動しやすい。よって、後胴回り域Ｓ２から股下域Ｓ３にかけて吸収コア３１を身体に沿った形状に変形させ易くなり、臀部を覆いつつ股下域にコンパクトに吸収コア３１を配置することができる。着用者の股間の適切な位置に使い捨ておむつを配置し、着用者の身体を適切に覆うことができる。 The front end edge of the deformation base point portion 85 may be arranged in front of the second intermediate line ML2 located between the rear end edge of the deformation base point portion 85 and the rear end edge of the inseam expansion / contraction portion 41 in the front-rear direction. As shown in FIG. 1, the second intermediate line ML2 is a line that passes through the middle in the front-rear direction between the rear end edge of the deformation base point portion 85 and the rear end edge 41R of the inseam expansion / contraction portion 41 and extends in the width direction W. .. The deformation base point portion 85 is provided over a region of more than half of the region between the rear end edge of the deformation base point portion 85 and the rear end edge of the inseam expansion / contraction portion 41. Therefore, the deformation of the absorption core 31 with the deformation base point portion 85 as the base point and the deformation of the absorption core 31 by the inseam expansion / contraction portion 41 are likely to be linked. Therefore, the absorption core 31 can be easily deformed into a shape along the body from the rear waist circumference region S2 to the inseam region S3, and the absorption core 31 can be compactly arranged in the inseam region while covering the buttocks. Disposable diapers can be placed appropriately in the wearer's crotch to properly cover the wearer's body.

一対の変形基点部８５の間には、変形基点部８５よりも幅方向Ｗの外側の領域よりも剛性が高い高剛性部が設けられてよい。本実施の形態では、後高剛性部の外側部が変形基点部８５を構成し、後高剛性部の外側部間の領域が、本構成の高剛性部を構成する。変形基点部８５間に高剛性部が設けられていることにより、変形基点部８５よりも幅方向Ｗの外側の領域と変形基点部８５よりも内側の領域との剛性差が生じ、変形基点部８５を基点として吸収コア３１がより変形し易くなる。よって、股下域側に向かって幅方向Ｗの長さが短くなるように吸収コア３１が変形し易くなり、着用者の股間に吸収コア３１をより収めやすくなる。着用者の股間の適切な位置に使い捨ておむつを配置することにより、着用者の身体を適切に覆うことができる。 A high-rigidity portion having higher rigidity than the region outside the width direction W of the deformation base point portion 85 may be provided between the pair of deformation base point portions 85. In the present embodiment, the outer portion of the rear high-rigidity portion constitutes the deformation base point portion 85, and the region between the outer portions of the rear high-rigidity portion constitutes the high-rigidity portion of the present configuration. Since the high rigidity portion is provided between the deformation base point portions 85, a rigidity difference occurs between the region outside the width direction W of the deformation base point portion 85 and the region inside the deformation base point portion 85, and the deformation base point portion The absorption core 31 is more easily deformed with 85 as a base point. Therefore, the absorption core 31 is easily deformed so that the length of the width direction W becomes shorter toward the inseam region side, and the absorption core 31 is more easily accommodated in the crotch of the wearer. By placing the disposable diaper in an appropriate position in the wearer's crotch, the wearer's body can be properly covered.

なお、後述する変形例に係る変形基点部のように、剛性が比較的低い変形基点部（例えば、低坪量部からなる変形基点部８５Ｃ）にあっては、一対の変形基点部８５の間の高剛性部の剛性が、変形基点部の剛性よりも高くてよい。 In the case of a deformation base point portion having relatively low rigidity (for example, a deformation base point portion 85C composed of a low basis weight portion) such as the deformation base point portion according to the deformation example described later, between the pair of deformation base point portions 85. The rigidity of the high-rigidity portion of the above may be higher than the rigidity of the deformation base point portion.

一対の変形基点部８５の間の高剛性部は、変形基点部８５と幅方向Ｗにおいて隣接していてもよい。変形基点部８５よりも幅方向Ｗの外側の領域が、変形基点部８５間の領域に対して変形し易くなり、剛性差によって吸収コア３１がより変形し易くなる。また、一対の変形基点部８５が高剛性部によって一体化する。変形基点部８５と高剛性部が一体化して着用者側に凸状に変形し易くなり、着用者の股間に吸収コア３１をより収めやすくなる。 The high-rigidity portion between the pair of deformation base points 85 may be adjacent to the deformation base point 85 in the width direction W. The region outside the deformation base point portion W in the width direction W is more likely to be deformed with respect to the region between the deformation base point portions 85, and the absorption core 31 is more likely to be deformed due to the difference in rigidity. Further, the pair of deformation base points 85 are integrated by the high rigidity portion. The deformation base point portion 85 and the high-rigidity portion are integrated and easily deformed in a convex shape toward the wearer side, so that the absorption core 31 can be more easily accommodated in the wearer's crotch.

本実施の形態の変形基点部８５及び変形基点部８５間の高剛性部は、いずれも圧搾部からなる後高剛性部によって構成されている。このように、変形基点部８５及高剛性部が、一体として形成されていてもよく、変形基点部８５及高剛性部の境界が形成されていなくてよい。後高剛性部全体が変形基点部８５としての機能、及び高剛性部としての機能を発揮してよい。また、圧搾部からなる変形基点部８５は、剛性が高く、吸収コア３１の変形をより安定し易くなる。 The high-rigidity portion between the deformation base point portion 85 and the deformation base point portion 85 of the present embodiment is composed of a rear high-rigidity portion composed of a squeezed portion. As described above, the deformation base point portion 85 and the high rigidity portion may be formed integrally, and the boundary between the deformation base point portion 85 and the high rigidity portion may not be formed. The entire rear high-rigidity portion may exhibit the function as the deformation base point portion 85 and the function as the high-rigidity portion. Further, the deformation base point portion 85 formed of the squeezed portion has high rigidity, and the deformation of the absorption core 31 becomes easier to stabilize.

一対の変形基点部８５は、使い捨ておむつの幅方向Ｗの中心を挟んで配置されており、変形基点部８５の少なくとも一部は、吸収コア３１の幅方向Ｗの中心と吸収コア３１の最大幅との中間に位置する第３中間線ＭＬ３よりも幅方向Ｗの外側に配置されてよい。図１に示すように、第３中間線ＭＬ３は、吸収コア３１の幅方向Ｗの中心と吸収コア３１の最大幅との中心を通り、かつ前後方向に延びる線である。吸収コア３１の幅方向Ｗの半分以上の領域において、吸収コア３１が変形基点部８５を基点に変形し易くなる。吸収コア３１の広い範囲で股下域側に向かって幅方向Ｗの長さが短くなるように吸収コア３１が変形し易くなり、着用者の股間に吸収コア３１をより収めやすくなる。 The pair of deformation base points 85 are arranged so as to sandwich the center of the width direction W of the disposable diaper, and at least a part of the deformation base point portion 85 is the center of the width direction W of the absorption core 31 and the maximum width of the absorption core 31. It may be arranged outside the width direction W from the third intermediate line ML3 located in the middle of. As shown in FIG. 1, the third intermediate line ML3 is a line that passes through the center of the width direction W of the absorption core 31 and the center of the maximum width of the absorption core 31 and extends in the front-rear direction. In a region of half or more of the width direction W of the absorption core 31, the absorption core 31 is easily deformed with the deformation base point portion 85 as the base point. The absorption core 31 is easily deformed so that the length of the width direction W becomes shorter toward the inseam region side in a wide range of the absorption core 31, and the absorption core 31 is more easily accommodated in the crotch of the wearer.

変形基点部８５から幅方向Ｗの外側に延びる第２延長線ＥＬ２上に、脚回り伸縮部４２が配置されてよい。第２延長線ＥＬ２は、変形基点部８５の任意の位置から幅方向Ｗの外側に延びる線であり、前後方向の位置が異なる位置に複数設けられる。いずれかの第２延長線ＥＬ２上に、脚回り伸縮部４２の少なくとも一部が配置されていればよい。後胴回り域に臀部を載せ、股下域側におむつを引っ張る際に、後胴回り域が臀部によって押さえられるとともに、吸収コア３１よりも幅方向Ｗの外側の領域が脚に密着する。脚回り伸縮部と臀部とが身体にフィットした状態で吸収コア３１が変形するため、臀部よりも前側において中央領域Ｒ３２がサイド領域Ｒ３１に対して立ち上がり易くなり、吸収コア３１が変形基点部８５を基点としてより変形し易くなる。 The leg circumference expansion / contraction portion 42 may be arranged on the second extension line EL2 extending outward in the width direction W from the deformation base point portion 85. The second extension line EL2 is a line extending outward in the width direction W from an arbitrary position of the deformation base point portion 85, and is provided at a plurality of positions having different positions in the front-rear direction. It suffices that at least a part of the leg circumference expansion / contraction portion 42 is arranged on any of the second extension lines EL2. When the buttocks are placed on the back waist area and the diaper is pulled toward the inseam area, the rear waist area is pressed by the buttocks, and the area outside the width direction W of the absorption core 31 is in close contact with the legs. Since the absorption core 31 is deformed while the leg circumference expansion and contraction portion and the buttocks are fitted to the body, the central region R32 easily rises with respect to the side region R31 on the front side of the buttocks, and the absorption core 31 deforms the deformation base point portion 85. It becomes easier to deform as a base point.

また、股下伸縮部４１から幅方向Ｗの外側に延びる延長線上に脚回り伸縮部４２配置されてもよい。脚回り伸縮部が身体にフィットした状態で吸収コア３１が変形することにより、中央領域Ｒ３２がサイド領域Ｒ３１に対してより立ち上がり易くなる。股下伸縮部４１の収縮によって吸収コア３１がより着用者側に引き上げられ易くなる。 Further, the leg circumference expansion / contraction portion 42 may be arranged on an extension line extending outward in the width direction W from the inseam expansion / contraction portion 41. By deforming the absorption core 31 in a state where the elastic portion around the legs fits the body, the central region R32 becomes easier to stand up with respect to the side region R31. The contraction of the inseam expansion / contraction portion 41 makes it easier for the absorption core 31 to be pulled up toward the wearer.

脚回り伸縮部４２は、後側に向かって幅方向Ｗの外側に向かって延びてよい。後側に向かって幅方向Ｗの外側に向かって延びる脚回り伸縮部が身体に密着することにより、着用者の臀部を使い捨ておむつで覆うことができる。後側に向かって広い範囲で臀部を覆った状態で、股下域に向けて吸収コア３１の幅方向Ｗの長さが短くなるように吸収コア３１を変形できる。着用者の股間に吸収コア３１を適切に収めつつ、使い捨ておむつによって身体全体を覆い、漏れを抑制できる。 The leg around extension / contraction portion 42 may extend toward the rear side toward the outside in the width direction W. The elastic portion around the leg extending toward the outside in the width direction W toward the rear side is in close contact with the body, so that the buttocks of the wearer can be covered with a disposable diaper. The absorption core 31 can be deformed so that the length of the absorption core 31 in the width direction W becomes shorter toward the inseam region while covering the buttocks in a wide range toward the rear side. While properly accommodating the absorbent core 31 in the crotch of the wearer, the disposable diaper can cover the entire body and prevent leakage.

吸収コア３１よりも幅方向Ｗの外側において、後側に向かって幅方向Ｗの外側に向かって延びるサイドフラップ部２７を有し、サイドフラップ部２７は、第２延長線ＥＬ２上に配置されてよい。サイドフラップ部２７は、使い捨ておむつの外側部において後側に向かって幅方向Ｗの外側に向かって延びる部分であり、図１において斜線を付して示した部分である。後胴回り域に臀部を載せ、股下域側におむつを引っ張る際に、後胴回り域が臀部によって押さえられるとともに、吸収コア３１よりも幅方向Ｗの外側のサイドフラップ部が脚に当たり易くなる。よって、吸収コア３１は、幅方向Ｗの外側に位置するサイドフラップ部と、臀部が載せられた領域と、が押さえられた状態で変形し、変形基点部８５を基点としてより変形し易くなる。 Outside the absorption core 31 in the width direction W, there is a side flap portion 27 extending toward the outside in the width direction W toward the rear side, and the side flap portion 27 is arranged on the second extension line EL2. good. The side flap portion 27 is a portion of the outer portion of the disposable diaper that extends toward the rear side toward the outside in the width direction W, and is a portion shown with diagonal lines in FIG. When the buttocks are placed on the rear waist area and the diaper is pulled toward the inseam area, the rear waist area is pressed by the buttocks, and the side flaps on the outer side in the width direction W of the absorption core 31 are more likely to hit the legs. Therefore, the absorption core 31 is deformed in a state where the side flap portion located outside in the width direction W and the region on which the buttocks are placed are held down, and the absorption core 31 is more easily deformed with the deformation base point portion 85 as the base point.

股下伸縮部４１と重なる領域に低坪量部３３が配置されていてもよい。吸収コア３１は、着用時に前後方向に延びる低坪量部を基点に変形する。よって、股下伸縮部４１の収縮によって吸収コア３１が身体側に凸状により変形し易くなり、着用者の股間に吸収コア３１を適切に収めることができる。吸収コア３１の変形基点となる低坪量部３３は、周囲の領域よりも坪量が低く、体液を吸収した後も厚さを抑えることができ、変形状態を維持できる。 The low basis weight portion 33 may be arranged in the area overlapping the inseam expansion / contraction portion 41. The absorption core 31 is deformed from a low basis weight portion extending in the front-rear direction when worn. Therefore, the absorption core 31 is more likely to be deformed in a convex shape toward the body due to the contraction of the inseam expansion / contraction portion 41, and the absorption core 31 can be appropriately accommodated in the crotch of the wearer. The low basis weight portion 33, which is the deformation base point of the absorption core 31, has a lower basis weight than the surrounding region, can suppress the thickness even after absorbing the body fluid, and can maintain the deformed state.

股下伸縮部４１は、中央高剛性部７１に対する幅方向Ｗの両方の外側に配置されてよい。股下伸縮部４１の収縮によって、中央高剛性部７１よりも幅方向Ｗの外側の領域を身体側に引き上げることができる。よって、低坪量部３３近傍が身体側に凸状に変形し易い。また、中央高剛性部７１は、股下伸縮部４１によって収縮し難い。よって、吸収面積を確保するとともに、股間に沿った凸形状を維持し、漏れを低減できる。 The inseam telescopic portion 41 may be arranged on both sides in the width direction W with respect to the central high-rigidity portion 71. By the contraction of the inseam expansion / contraction portion 41, the region outside the width direction W can be pulled up toward the body side from the central high-rigidity portion 71. Therefore, the vicinity of the low basis weight portion 33 is likely to be deformed in a convex shape toward the body side. Further, the central high-rigidity portion 71 is difficult to contract due to the inseam expansion / contraction portion 41. Therefore, it is possible to secure an absorption area, maintain a convex shape along the crotch, and reduce leakage.

（５）変形例
次いで、変形例に係る変形基点部について説明する。図９は、変形例に係る変形基点部を有する吸収コア３１の平面を模式的に示した図である。なお、以下の変形例の説明においては、上述の実施形態と異なる構成のみ説明し、実施形態と同様の構成については、同符号を用いて説明を省略する。 (5) Deformation Example Next, the deformation base point portion according to the modification will be described. FIG. 9 is a diagram schematically showing a plane of the absorption core 31 having the deformation base point portion according to the deformation example. In the following description of the modified example, only the configuration different from the above-described embodiment will be described, and the description of the same configuration as that of the embodiment will be omitted by using the same reference numerals.

図９（Ａ）は、変形例１に係る変形基点部８５Ａを有する吸収コア３１Ａを示している。変形基点部８５Ａは、幅方向Ｗに間隔を空けて一対で配置されている。変形基点部８５Ａは、股下伸縮部４１よりも幅方向Ｗの内側に配置されており、第１延長線ＥＬ１上に配置されていない。変形基点部８５Ａは、圧搾部によって構成されている。 FIG. 9A shows an absorption core 31A having a deformation base point portion 85A according to the first modification. The deformation base point portions 85A are arranged in pairs at intervals in the width direction W. The deformation base point portion 85A is arranged inside the inseam expansion / contraction portion 41 in the width direction W, and is not arranged on the first extension line EL1. The deformation base point portion 85A is composed of a squeezing portion.

図９（Ｂ）は、変形例２に係る変形基点部８５Ｂを有する吸収コア３１Ｂを示している。変形基点部８５Ｂは、幅方向Ｗに間隔を空けて一対で配置されている。変形基点部８５Ａは、股下伸縮部４１よりも幅方向Ｗの外側に配置されており、第１延長線ＥＬ１上に配置されていない。変形基点部８５Ａは、圧搾部によって構成されている。 FIG. 9B shows an absorption core 31B having a deformation base point portion 85B according to the second modification. The deformation base point portions 85B are arranged in pairs at intervals in the width direction W. The deformation base point portion 85A is arranged outside the inseam expansion / contraction portion 41 in the width direction W, and is not arranged on the first extension line EL1. The deformation base point portion 85A is composed of a squeezing portion.

変形例２に示すように、股下伸縮部４１は、変形基点部８５に沿い、かつ変形基点部８５の前端縁から前側に延びる第３延長線ＥＬ３上に配置されてよい。第３延長線ＥＬ３は、変形基点部８５に沿って延びる線であって、変形基点部８５の前端縁から前側に延びる線である。変形基点部８５を基点とした吸収コア３１Ｂの変形と、股下伸縮部４１による吸収コア３１Ｂの変形と、が連動しやすくなる。よって、後胴回り域から股下域側に向かって幅方向Ｗの長さが短くなるように変形した吸収コア３１Ｂを、股下域において身体側に近づけてより配置し易くなる。 As shown in the modified example 2, the inseam telescopic portion 41 may be arranged along the deformed base point portion 85 and on the third extension line EL3 extending forward from the front end edge of the deformed base point portion 85. The third extension line EL3 is a line extending along the deformation base point portion 85, and is a line extending forward from the front end edge of the deformation base point portion 85. The deformation of the absorption core 31B with the deformation base point portion 85 as the base point and the deformation of the absorption core 31B by the inseam expansion / contraction portion 41 are easily linked. Therefore, the absorption core 31B deformed so that the length of the width direction W becomes shorter from the rear waist circumference region toward the inseam region side is closer to the body side in the inseam region, and it becomes easier to arrange the absorption core 31B.

図９（Ｃ）は、変形例３に係る変形基点部８５Ｃを有する吸収コア３１Ｃを示している。変形基点部８５Ｃは、吸収コアの低坪量部によって構成されている。変形例に係る吸収コア３１Ｃは、装着時に股下域側に引っ張られた際に、スリットの内端縁を基点に折れ線が形成され、厚さ方向に変形する。よって、変形例３に係る基点縁８５Ｅは、変形基点部８５Ｃの内側縁によって構成される。 FIG. 9C shows an absorption core 31C having a deformation base point portion 85C according to the deformation example 3. The deformation base point portion 85C is composed of a low basis weight portion of the absorption core. When the absorption core 31C according to the modification is pulled toward the inseam region at the time of mounting, a polygonal line is formed from the inner end edge of the slit as a base point, and the absorption core 31C is deformed in the thickness direction. Therefore, the base point edge 85E according to the modification 3 is composed of the inner edge of the deformation base point portion 85C.

本明細書における「吸収コアの坪量」の測定は、以下の測定方法によって行われるものとする。使い捨ておむつ１０がパッケージなどに封入されている場合には、パッケージから取り出し、その状態にて20℃±2℃、相対湿度60％±5％RHの雰囲気下において12時間放置したサンプルを用いる。包装シート等によって包装された使い捨ておむつにおいては包装シートを開封し、折り畳まれた使い捨ておむつを展開する。次いで、坪量を測定する部分を使い捨ておむつから切り出し、切り出した部分から表面シート等、吸収コア以外の部分を取り除く。そして、吸収コアの坪量を測定する部分の面積及び重量を測定する。重量と面積とに基づいて坪量を算出する。 The measurement of the "basis weight of the absorption core" in the present specification shall be performed by the following measurement method. If the disposable diaper 10 is enclosed in a package or the like, take it out of the package and use a sample left in that state for 12 hours in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH. For disposable diapers wrapped with a wrapping sheet or the like, the wrapping sheet is opened and the folded disposable diaper is unfolded. Next, the part for measuring the basis weight is cut out from the disposable diaper, and the part other than the absorption core such as the surface sheet is removed from the cut out part. Then, the area and weight of the portion for measuring the basis weight of the absorption core are measured. Calculate the basis weight based on the weight and area.

本明細書における「曲げ剛性」は、ガーレー剛軟度によって測定された値であってもよい。ガーレー剛軟度の測定は、(株)安田精機製作所製のＮｏ３１１のガーレー式柔軟度試験機を用いて、ＪＩＳ－Ｌ１０９６に準拠して測定することが可能である。ガーレー剛軟度の測定のサンプルの幅方向Ｗの長さは、30ｍｍ、前後方向の長さは、25ｍｍとすることができる。 The "flexural rigidity" in the present specification may be a value measured by Garley rigidity and softness. The garley stiffness and softness can be measured in accordance with JIS-L1096 using a No. 311 garley type flexibility tester manufactured by Yasuda Seiki Seisakusho Co., Ltd. The length W in the width direction of the sample for measuring the Gurley stiffness and softness can be 30 mm, and the length in the anteroposterior direction can be 25 mm.

以上、上述の実施形態を用いて本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 Although the present invention has been described in detail using the above-described embodiments, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and modifications without departing from the spirit and scope of the present invention as determined by the description of the scope of claims. Therefore, the description of the present specification is for the purpose of exemplary explanation and does not have any limiting meaning to the present invention.

本発明によれば、身体の臀部及び股間に沿うように吸収コアを変形させ、着用者の身体を適切に覆うことができる使い捨ておむつを提供できる。 According to the present invention, it is possible to provide a disposable diaper capable of deforming the absorbent core along the buttocks and crotch of the body to appropriately cover the wearer's body.

１０ 使い捨ておむつ
１０ＬＣ ：おむつの前後方向の中心
１０ＷＣ ：おむつの幅方向の中心
２１ 表面シート
２２ サイドシート
２３ 裏面シート
２４ 外装シート
２７ サイドフラップ部
３０ 吸収体
３１ 吸収コア
３２ コアラップ
３３ 低坪量部
４１ 股下伸縮部
４２ 脚回り伸縮部
４３ 防漏伸縮部
４５ 腰回り伸縮部
５１ インジケータ
７１ 中央高剛性部
７２ 後高剛性部
８５ 変形基点部
９１ ファスニングテープ
９２ ベース部
９３ 係合部
ＥＬ１ 第１延長線
ＥＬ２ 第２延長線
ＥＬ３ 第３延長線
ＭＬ１ 第１中間線
ＭＬ２ 第２中間線
ＭＬ３ 第３中間線
Ｓ１ 前胴回り域
Ｓ２ 後胴回り域
Ｓ３ 股下域
Ｔ 厚さ方向
Ｔ１ 肌面側
Ｔ２ 非肌面側
Ｌ 前後方向
Ｗ 幅方向 10 Disposable diaper 10LC: Center in the front-back direction of the diaper 10WC: Center in the width direction of the diaper 21 Front sheet 22 Side sheet 23 Back sheet 24 Exterior sheet 27 Side flap part 30 Absorber 31 Absorbent core 32 Core wrap 33 Low basis weight part 41 Inseam Telescopic part 42 Leg circumference Telescopic part 43 Leakage-proof elastic part 45 Waist circumference elastic part 51 Indicator 71 Central high-rigidity part 72 Rear high-rigidity part 85 Deformation base point part 91 Fastening tape 92 Base part 93 Engagement part EL1 First extension line EL2 No. 2 Extension line EL3 3rd extension line ML1 1st intermediate line ML2 2nd intermediate line ML3 3rd intermediate line S1 Front waist circumference area S2 Rear waist circumference area S3 Inseam area T Thickness direction T1 Skin surface side T2 Non-skin surface side L Front-back direction W width direction

Claims (13)

互いに直交する前後方向及び幅方向と、
前胴回り域、後胴回り域、及び前記前胴回り域及び前記後胴回り域との間に配置された股下域と、
少なくとも前記股下域に配置された吸収コアと、
前記後胴回り域に配置されたファスニングテープと、を有する使い捨ておむつであって、
前記股下域の前記吸収コアと重なる領域において、前記前後方向に延び、かつ前記幅方向に間隔を空けて配置された一対の股下伸縮部を有し、
前記吸収コアには、前記股下伸縮部よりも後側において、前記後側に向かって前記幅方向の外側に向かって延び、かつ前記幅方向に間隔を空けて配置された一対の変形基点部が設けられており、
前記一対の変形基点部の間には、前記変形基点部よりも前記幅方向の外側の領域よりも剛性が高い後高剛性部が設けられており、
前記一対の股下伸縮部の間には、前記後高剛性部と前後方向に離間して配置され、周囲よりも剛性が高い中央高剛性部が設けられている、使い捨ておむつ。 In the front-back direction and width direction that are orthogonal to each other,
The front waist area, the rear waist area, and the inseam area arranged between the front waist area and the rear waist area, and the inseam area.
At least the absorption core placed in the inseam area,
A disposable diaper having a fastening tape arranged in the rear waist circumference area.
It has a pair of inseam telescopic portions extending in the anterior-posterior direction and spaced apart in the width direction in a region overlapping the absorption core in the inseam region.
The absorption core has a pair of deformation base points extending toward the rear side toward the outside in the width direction and arranged at intervals in the width direction on the rear side of the inseam expansion / contraction portion. It is provided ,
Between the pair of deformation base points, a rear high-rigidity portion having higher rigidity than the region outside the width direction of the deformation base point is provided.
A disposable diaper in which a central high-rigidity portion, which is arranged apart from the rear high-rigidity portion in the front-rear direction and has higher rigidity than the surroundings, is provided between the pair of inseam expansion / contraction portions . 前記後高剛性部は、前記吸収コアが厚さ方向に圧縮された圧搾部によって構成されており、 The rear high-rigidity portion is composed of a squeezed portion in which the absorption core is compressed in the thickness direction.
前記変形基点部は、前記後高剛性部の外側縁によって構成されている、請求項１に記載の使い捨ておむつ。 The disposable diaper according to claim 1, wherein the deformation base point portion is composed of an outer edge of the rear high rigidity portion. 前記股下伸縮部の外側縁は、前記変形基点部の外側縁よりも前記幅方向の内側に配置されている、請求項１又は請求項２に記載の使い捨ておむつ。 The disposable diaper according to claim 1 or 2 , wherein the outer edge of the inseam elastic portion is arranged inside the outer edge of the deformation base point portion in the width direction. 前記変形基点部の少なくとも一部は、前記股下伸縮部の後端縁から後側に延びる第１延長線上に配置されている、請求項１から請求項３のいずれか１項に記載の使い捨ておむつ。 The disposable diaper according to any one of claims 1 to 3 , wherein at least a part of the deformation base point portion is arranged on a first extension line extending rearward from the rear end edge of the inseam expansion / contraction portion. .. 前記ファスニングテープは、前記前胴回り域に係合する係合部を有し、
前記変形基点部は、前記使い捨ておむつの前記前後方向の中心と前記係合部の前端縁との前記前後方向の中間に位置する第１中間線を前記前後方向に跨がっている、請求項１から請求項４のいずれか１項に記載の使い捨ておむつ。 The fastening tape has an engaging portion that engages with the front waist circumference area.
The invention claims that the deformation base point portion straddles the first intermediate line located between the center of the disposable diaper in the anteroposterior direction and the front end edge of the engaging portion in the anteroposterior direction in the anteroposterior direction. The disposable diaper according to any one of claims 1 to 4 . 前記変形基点部の前端縁は、前記変形基点部の後端縁と前記股下伸縮部の後端縁との前記前後方向の中間に位置する第２中間線よりも前側に配置されている、請求項１から請求項５のいずれか１項に記載の使い捨ておつ。 The front end edge of the deformation base point portion is arranged in front of the second intermediate line located between the rear end edge of the deformation base point portion and the rear end edge of the inseam expansion / contraction portion in the anteroposterior direction. The disposable inseam according to any one of claims 1 to 5 . 前記変形基点部は、前記後高剛性部と前記幅方向において隣接する、請求項６に記載の使い捨ておむつ。 The disposable diaper according to claim 6, wherein the deformation base point portion is adjacent to the rear high rigidity portion in the width direction. 前記変形基点部は、前記吸収コアが厚さ方向に圧縮された圧搾部によって構成されている、請求項１から請求項７のいずれか１項に記載の使い捨ておむつ。 The disposable diaper according to any one of claims 1 to 7, wherein the deformation base point portion is composed of a squeezing portion in which the absorption core is compressed in the thickness direction. 前記一対の変形基点部は、前記使い捨ておむつの前記幅方向の中心を挟んで配置されており、
前記変形基点部の少なくとも一部は、前記吸収コアの前記幅方向の中心と前記吸収コアの最大幅との中間に位置する第３中間線よりも前記幅方向の外側に配置されている、請求項１から請求項８のいずれか１項に記載の使い捨ておむつ。 The pair of deformation base points are arranged so as to sandwich the center of the disposable diaper in the width direction.
A claim that at least a part of the deformation base point portion is arranged outside the width direction from a third intermediate line located between the center of the absorption core in the width direction and the maximum width of the absorption core. The disposable diaper according to any one of claims 1 to 8. 前記吸収コアよりも前記幅方向の外側において前記前後方向に伸縮する脚回り伸縮部を有し、
前記脚回り伸縮部は、前記変形基点部から前記幅方向の外側に延びる第２延長線上に配置されている、請求項１から請求項９のいずれか１項に記載の使い捨ておむつ。 It has a leg circumference expansion / contraction portion that expands / contracts in the front-rear direction on the outside of the absorption core in the width direction.
The disposable diaper according to any one of claims 1 to 9, wherein the leg-circling expansion / contraction portion is arranged on a second extension line extending outward in the width direction from the deformation base point portion. 前記脚回り伸縮部は、前記後側に向かって前記幅方向の外側に向かって延びている、請求項１０に記載の使い捨ておむつ。 The disposable diaper according to claim 10, wherein the leg-circling elastic portion extends outward in the width direction toward the rear side. 前記使い捨ておむつの外側部は、前記後側に向かって前記幅方向の外側に向かって延びるサイドフラップ部を有し、
前記サイドフラップ部は、前記変形基点部から前記幅方向に沿って延びる第２延長線上に配置されている、請求項１から請求項１１のいずれか１項に記載の使い捨ておむつ。 The outer portion of the disposable diaper has a side flap portion extending outward in the width direction toward the rear side.
The disposable diaper according to any one of claims 1 to 11, wherein the side flap portion is arranged on a second extension line extending from the deformation base point portion along the width direction. 前記股下伸縮部は、前記変形基点部に沿い、かつ前記変形基点部の前端縁から前側に延びる第３延長線上に配置されている、請求項１から請求項１２のいずれか１項に記載の使い捨ておむつ。 The one according to any one of claims 1 to 12, wherein the inseam expansion / contraction portion is arranged along the deformation base point portion and on a third extension line extending forward from the front end edge of the deformation base point portion. Disposable diapers.
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