JP5144229B2

JP5144229B2 - Pants-type absorbent article

Info

Publication number: JP5144229B2
Application number: JP2007299841A
Authority: JP
Inventors: 了一山本
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2007-11-19
Filing date: 2007-11-19
Publication date: 2013-02-13
Anticipated expiration: 2027-11-19
Also published as: JP2009125088A

Description

本発明は、幼児用、大人用、あるいは失禁者用として用いられるパンツ型吸収性物品に関する。 The present invention relates to a pants-type absorbent article used for infants, adults, or incontinent persons.

パンツ型吸収性物品において、ウエスト開口部とレッグ開口部との間に、おむつの幅方向に延びる弾性部材を配したものが知られている。例えば、ウエスト開口部からレッグ開口部までの領域を、長手方向に４等分する仮想分割線をひき、ウエスト開口部から順に第１領域、第２領域、第３領域、第４領域を考えたときに、第２領域のおむつ着用時の圧力の平均値が０．９〜１．８ｋＰａで且つ最大値が２．５ｋＰａ以下となされており、また第１領域及び第３領域は、おむつ着用時の圧力が第２領域よりも低くなされているパンツ型使い捨ておむつが提案されている（特許文献１参照）。 In a pants-type absorbent article, an elastic member extending in the width direction of a diaper is disposed between a waist opening and a leg opening. For example, a virtual dividing line that divides the region from the waist opening to the leg opening into four equal parts in the longitudinal direction is drawn, and the first region, the second region, the third region, and the fourth region are considered in order from the waist opening. Sometimes, the average value of the pressure when wearing the diaper of the second region is 0.9 to 1.8 kPa and the maximum value is 2.5 kPa or less, and the first region and the third region are when wearing the diaper A pants-type disposable diaper in which the pressure is lower than that in the second region has been proposed (see Patent Document 1).

また、ウエスト開口部から脚開口部までの区間をウエスト開口部側から順に、腰部区間、脇上部区間、脇下部区間の３区間に区分したときに、各区間毎の弾性伸縮力が脇下部区間≧脇上部区間＞腰部区間の関係にあることを特徴としたパンツ型使い捨ておむつが提案されている（特許文献２参照）。 In addition, when the section from the waist opening to the leg opening is divided into the three sections of the waist section, the side upper section, and the side lower section in order from the waist opening side, the elastic expansion and contraction force for each section is A pants-type disposable diaper characterized by a relationship of ≧ armpit section> waist section has been proposed (see Patent Document 2).

特開２００６−６１６８１号公報JP 2006-61681 A 特開２００１−１７８７７０号公報JP 2001-178770 A

従来のパンツ型吸収性物品には下記課題がある。
着用中におけるおむつのずれ落ちを抑えて、おむつの外観をすっきり綺麗にさせることや、着用者が動き易いおむつが要望されている。
また、着用時における、必要以上に体を締め付けることなく、フィット性およびはき心地が良好なおむつが要望されている。 Conventional pants-type absorbent articles have the following problems.
There is a demand for a diaper that suppresses the falling of the diaper during wearing and makes the appearance of the diaper clean and is easy for the wearer to move.
In addition, there is a demand for a diaper that has good fit and comfort without being tightened more than necessary when worn.

本発明のパンツ型吸収性物品は、これらの課題を解消するものであり、本発明の目的は、前述した従来技術が有する種々の欠点を解消しうるパンツ型吸収性物品を提供することにある。 The pant-type absorbent article of the present invention solves these problems, and an object of the present invention is to provide a pant-type absorbent article that can eliminate the various disadvantages of the prior art described above. .

本発明は、腹側部、股下部及び背側部を有し、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型吸収性物品であって、一対のサイドシール部それぞれにおける最も上方に位置する弾性部材の上端同士を結ぶ上部仮想直線と、一対のサイドシール部それぞれにおける最も下方に位置する弾性部材の下端同士を結ぶ下部仮想直線との間の領域を、吸収性物品幅方向に延びる４本の同じ幅の帯状領域に区分し、該４本の帯状領域を、上部仮想直線側から下部仮想直線側に向かって順に第１領域、第２領域、第３領域、第４領域に幅方向としたときに、吸収性物品着用時の各領域収縮力は、第２領域が第３領域よりも大きく、第４領域が第３領域よりも大きく、第２領域が第１領域よりも大きいパンツ型吸収性物品を提供することにより前記目的を達成したものである。 The present invention is a pant-type absorbent article having an abdominal side portion, a crotch portion, and a back side portion, and having a pair of side seal portions, a waist opening portion, and a pair of leg opening portions, A region between an upper imaginary straight line connecting the upper ends of the elastic members positioned at the uppermost position in each of the seal portions and a lower imaginary straight line connecting the lower ends of the elastic members positioned at the lowermost positions of each of the pair of side seal portions, The four belt-like regions extending in the width direction of the absorbent article are divided into four regions having the same width, and the four belt-like regions are sequentially arranged from the upper virtual straight line side toward the lower virtual straight line side. When the region and the fourth region are in the width direction, each region contraction force when wearing the absorbent article is larger in the second region than the third region, the fourth region is larger than the third region, Pants-type absorption that is larger than the first region It is obtained by achieving the above object by providing an article.

本発明のパンツ型吸収性物品は、具体的には下記の効果を発現するものである。
(a) 着用者の動作による変動の大きい領域（第１領域）の収縮力を低く設定することが可能になるために、はき心地が良好になる。
(b) 骨が身体表面まで突出している安定領域（第２及び第４領域）の収縮力を高く設定することで、着用者の排泄による重量を支えるための支点を形成させることが可能となるために、吸収性物品のずれ落ちが起こりづらく、ずれ落ちに起因した着用者の動作を妨げづらくなる。
(c) 吸収性物品に配されている弾性部材が着用者の身体を過度に締め付けることが防止され、着用感が良好になる。 The pant-type absorbent article of the present invention specifically exhibits the following effects.
(a) Since it becomes possible to set the contraction force of the region (first region) having a large variation due to the movement of the wearer to be low, the comfort is improved.
(b) It is possible to form a fulcrum for supporting the weight due to excretion of the wearer by setting the contraction force of the stable region (second and fourth regions) where the bone protrudes to the body surface to a high level. For this reason, it is difficult for the absorbent article to slip off, and it is difficult to hinder the wearer's movement due to the slipping.
(c) The elastic member disposed on the absorbent article is prevented from excessively tightening the wearer's body, and the feeling of wear is improved.

以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。図１には、本発明のパンツ型吸収性物品の一実施形態として、パンツ型の使い捨ておむつの斜視図が示されている。図２には図１に示す吸収性物品を組み立てる前の状態の分解斜視図が示されている。図３には、図２における吸収性物品の展開状態の平面図が示されている。なお、以下の説明において吸収性物品の展開状態とは、吸収性物品のサイドシール部が接合される前の状態をいい、接合状態とはサイドシール部が接合された後の状態をいう。 The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a perspective view of a pants-type disposable diaper as an embodiment of the pants-type absorbent article of the present invention. FIG. 2 is an exploded perspective view showing a state before the absorbent article shown in FIG. 1 is assembled. FIG. 3 is a plan view of the developed state of the absorbent article in FIG. In the following description, the developed state of the absorbent article refers to the state before the side seal portion of the absorbent article is joined, and the joined state refers to the state after the side seal portion is joined.

本実施形態の吸収性物品１は、液透過性の表面シート２、液不透過性の裏面シート３及び両シート２，３間に介在配置された液保持性の吸収性コア４を有する実質的に縦長の吸収体本体１０と、該吸収体本体１０の裏面シート３側に配された外包材１１とを備えている。
外包材１１は、その両側縁が、長手方向中央部において内方に括れた砂時計形の形状をしており、おむつの輪郭を画成している。外包材１１はその長手方向において、着用者の腹側に配される腹側部Ａと背側に配される背側部Ｂとその間に位置する股下部Ｃとに区分される。腹側部Ａ及び背側部Ｂは、外包材１１の長手方向前後端部に相当し、股下部Ｃは外包材１１の長手方向中央部に相当する。外包材１１は、その腹側部Ａの両側縁Ａ１、Ａ２と背側部Ｂの両側縁Ｂ１、Ｂ２とが互いに接合されて、吸収性物品１にはウエスト開口部５及び一対のレッグ開口部６が形成される。この接合によって、吸収性物品１の左右両側縁には一対のサイドシール部Ｓが形成される。この接合には例えばヒートシール、高周波シール、超音波シール、ホットメルトシール等が用いられる。
表面シート２、裏面シート３及び吸収性コア４はそれぞれ矩形状であり、一体化されて縦長の吸収体本体１０を形成している。表面シート２及び裏面シート３としては、従来この種の吸収性物品に用いられているものと同様のものを用いることができる。また吸収性コア４は、高吸収性ポリマーの粒子及び繊維材料から構成されており、ティッシュペーパー（図示せず）によって被覆されている。 The absorbent article 1 of the present embodiment substantially has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent core 4 interposed between the sheets 2 and 3. Are provided with a vertically long absorbent body 10 and an outer packaging material 11 arranged on the back sheet 3 side of the absorbent body 10.
The outer packaging material 11 has an hourglass shape in which both side edges are bound inward in the central portion in the longitudinal direction, and defines the outline of the diaper. The outer packaging material 11 is divided in the longitudinal direction into an abdominal side A disposed on the wearer's abdominal side, a back side B disposed on the back side, and a crotch C positioned therebetween. The abdomen A and the back B correspond to the longitudinal front and rear ends of the outer packaging material 11, and the crotch C corresponds to the longitudinal center of the outer packaging material 11. The outer packaging material 11 has both side edges A1 and A2 of the ventral side A and both side edges B1 and B2 of the back side B joined together, and the absorbent article 1 has a waist opening 5 and a pair of leg openings. 6 is formed. By this joining, a pair of side seal portions S are formed on the left and right side edges of the absorbent article 1. For this joining, for example, heat sealing, high frequency sealing, ultrasonic sealing, hot melt sealing, or the like is used.
The top sheet 2, the back sheet 3, and the absorbent core 4 each have a rectangular shape, and are integrated to form a vertically long absorbent body 10. As the surface sheet 2 and the back surface sheet 3, the same materials as those conventionally used for this type of absorbent article can be used. Moreover, the absorptive core 4 is comprised from the particle | grains and fiber material of the superabsorbent polymer, and is coat | covered with the tissue paper (not shown).

図２に示すように、吸収体本体１０の長手方向の左右両側には、液抵抗性ないし液不透過性で且つ通気性の素材から構成された側方カフス８が形成されている。各側方カフス８は、吸収体本体１０の長手方向に沿って固定端部及び自由端部を有している。固定端部は、表面シート２に固定されている。一方、自由端部の近傍には、側方カフス弾性部材８１が伸張状態で配されている。これにより、使用時において側方カフス弾性部材８１が収縮することにより側方カフス８が起立して、吸収体本体１０の幅方向への液の流出が阻止される。 As shown in FIG. 2, side cuffs 8 made of a liquid resistant or liquid impermeable and breathable material are formed on the left and right sides of the absorbent body 10 in the longitudinal direction. Each side cuff 8 has a fixed end and a free end along the longitudinal direction of the absorbent body 10. The fixed end is fixed to the top sheet 2. On the other hand, a side cuff elastic member 81 is arranged in an expanded state in the vicinity of the free end. As a result, the side cuff 8 is erected by contracting the side cuff elastic member 81 during use, and the outflow of liquid in the width direction of the absorbent body 10 is prevented.

外包材１１は、少なくとも二枚の不織布、即ち外層不織布１２と該外層不織布１２の内面側に配された内層不織布１３とを有している。外層不織布１２は吸収性物品１の外面をなし、内層不織布１３は外層不織布１２の内面側に、ホットメルト接着剤などの接着剤やエンボス加工等によって接合されている。吸収性物品の外側からの液の染み込み及び内側からの液の染み出しを防止する観点から、内層不織布１３及び外層不織布１２は、両方の不織布が撥水性不織布であることが好ましい。 The outer packaging material 11 has at least two nonwoven fabrics, that is, an outer layer nonwoven fabric 12 and an inner layer nonwoven fabric 13 disposed on the inner surface side of the outer layer nonwoven fabric 12. The outer layer nonwoven fabric 12 forms the outer surface of the absorbent article 1, and the inner layer nonwoven fabric 13 is joined to the inner surface side of the outer layer nonwoven fabric 12 by an adhesive such as a hot melt adhesive or embossing. From the viewpoint of preventing the penetration of the liquid from the outside of the absorbent article and the bleeding of the liquid from the inside, it is preferable that both the nonwoven fabrics of the inner layer nonwoven fabric 13 and the outer layer nonwoven fabric 12 are water-repellent nonwoven fabrics.

外包材１１は、吸収体本体１０の前後端縁から外方に延出しており、延出した部分が吸収体本体１０側に折り返されている。折り返された外包材１１は、吸収体本体１０の前後端部上を被覆している。 The outer packaging material 11 extends outward from the front and rear end edges of the absorbent body 10, and the extended portion is folded back to the absorbent body 10 side. The wrapped outer packaging material 11 covers the front and rear end portions of the absorbent body 10.

外包材１１における前後端部には、前後端縁に沿って、複数のウエスト部弾性部材５１、５１が、外包材１１の幅方向に亘り配されている。各ウエスト部弾性部材５１、５１は、外層不織布１２と内層不織布１３とによって伸張状態で挟持固定されている。各ウエスト部弾性部材５１、５１は、吸収性物品１の腹側部Ａの両側縁Ａ１，Ａ２と背側部Ｂの両側縁Ｂ１，Ｂ２とを互いに接合させたときに、両弾性部材５１、５１の端部同士が重なるように配されている。これによって、図１に示すように、吸収性物品１のウエスト開口部５の付近には実質的に連続したリング状のウエストギャザーが形成される。 A plurality of waist elastic members 51, 51 are arranged in the width direction of the outer packaging material 11 at the front and rear end portions of the outer packaging material 11 along the front and rear edge. The waist elastic members 51 and 51 are sandwiched and fixed in an expanded state by the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. When each waist part elastic member 51, 51 joins both side edges A1, A2 of the stomach side part A of the absorbent article 1 and both side edges B1, B2 of the back side part B, both elastic members 51, It arrange | positions so that the edge parts of 51 may overlap. As a result, as shown in FIG. 1, a substantially continuous ring-shaped waist gather is formed in the vicinity of the waist opening 5 of the absorbent article 1.

外包材１１における左右両側の湾曲部には、レッグ部弾性部材６１ａ、６１ｂが配されている。各レッグ部弾性部材６１ａ、６１ｂは、前記湾曲部に沿って配されている。各レッグ部弾性部材６１ａ、６１ｂは、外層不織布１２と内層不織布１３との間に配されており、所定の接合手段によって、両不織布１２、１３に伸張状態で固定されている。各レッグ部弾性部材６１ａ、６１ｂは、その一端どうしが股下部Ｃにおいて重なり合っている。一方、他端は腹側部Ａ及び背側部Ｂの各側縁の位置において終端している。各レッグ部弾性部材６１ａ、６１ｂは、おむつ１の腹側部Ａの両側縁Ａ１，Ａ２と背側部Ｂの両側縁Ｂ１，Ｂ２とを互いに接合させたときに、両弾性部材６１ａ、６１ｂの端部同士が重なるように配されている。これによって、図１に示すように、吸収性物品１のレッグ開口部６、６の付近には実質的に連続したリング状のレッグギャザーが形成される。 Leg elastic members 61a and 61b are disposed on the left and right curved portions of the outer packaging material 11, respectively. Each leg part elastic member 61a, 61b is distribute | arranged along the said curved part. Each leg part elastic member 61a, 61b is distribute | arranged between the outer-layer nonwoven fabric 12 and the inner-layer nonwoven fabric 13, and is fixed to both the nonwoven fabrics 12 and 13 by the predetermined joining means in the expansion | extension state. One end of each leg part elastic member 61a, 61b overlaps in the crotch part C. On the other hand, the other end is terminated at the position of each side edge of the ventral side A and the back side B. When each leg part elastic member 61a, 61b joins both the side edges A1, A2 of the belly side part A of the diaper 1 and both side edges B1, B2 of the back side part B, the both elastic members 61a, 61b It arrange | positions so that edge parts may overlap. Thereby, as shown in FIG. 1, a substantially continuous ring-shaped leg gather is formed in the vicinity of the leg openings 6, 6 of the absorbent article 1.

本実施形態のおむつ１においては、図３に示すように、接合状態の吸収性物品１の腹側部Ａ及び背側部Ｂそれぞれにおいて、ウエスト開口部とレッグ開口部までの幅方向に沿って弾性部材が配設されているサイド部において、弾性部材の最上から最下までの区間を４等分し、ウエスト開口部側から順に第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ、第４領域７Ｄの４つの領域を仮想的に考える。
より具体的には、一対のサイドシール部Ｓ，Ｓそれぞれにおける最も上方に位置する弾性部材５１の上端同士を結ぶ上部仮想直線Ｌ１と、一対のサイドシール部Ｓ，Ｓそれぞれにおける最も下方に位置する弾性部材６１ａ又は６１ｂの下端同士を結ぶ下部仮想直線Ｌ２との間の領域を、おむつ幅方向に延びる４本の相互に同じ幅の帯状領域７Ａ〜７Ｄに区分し、該４本の帯状領域７Ａ〜７Ｄを、上部仮想直線Ｌ１側から下部仮想直線Ｌ２側に向かって順に、第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ及び第４領域７Ｄとする。 In the diaper 1 of the present embodiment, as shown in FIG. 3, along the width direction from the waist opening to the leg opening in each of the belly side A and the back side B of the absorbent article 1 in the joined state. In the side portion where the elastic member is disposed, the section from the top to the bottom of the elastic member is divided into four equal parts, and the first region 7A, the second region 7B, the third region 7C, Consider four regions of four regions 7D virtually.
More specifically, the upper virtual straight line L1 that connects the upper ends of the uppermost elastic members 51 in each of the pair of side seal portions S, S, and the lowermost position in each of the pair of side seal portions S, S is located. A region between the lower imaginary straight line L2 connecting the lower ends of the elastic members 61a or 61b is divided into four belt-like regions 7A to 7D having the same width extending in the diaper width direction, and the four belt-like regions 7A. -7D are defined as a first region 7A, a second region 7B, a third region 7C, and a fourth region 7D in order from the upper virtual straight line L1 side to the lower virtual straight line L2 side.

各領域７Ａ〜７Ｄは吸収性物品１の幅方向に延在している。この４つの領域のうち、第１領域７Ａにはウエスト部弾性部材５１が主として存在している。また第４領域７Ｄにはレッグ部弾性部材６１ａ，６１ｂと吸収性物品１の幅方向に延びる弾性部材が存在している。また、第１領域７Ａと第４領域７Ｄとの間の第２領域７Ｂ及び第３領域７Ｃには、吸収性物品１の幅方向に延びる弾性部材が多数配されている。これらの弾性部材のうち、第２領域７Ｂに存在するものを第１弾性部材７１ａと呼び、第３領域７Ｃに存在するものを第２弾性部材７２ａと呼び、第４領域７Ｄに存在するものを第３弾性部材７３ａと呼ぶこととする。 Each region 7 </ b> A to 7 </ b> D extends in the width direction of the absorbent article 1. Of these four regions, the waist elastic member 51 is mainly present in the first region 7A. Further, the leg region elastic members 61a and 61b and an elastic member extending in the width direction of the absorbent article 1 exist in the fourth region 7D. A large number of elastic members extending in the width direction of the absorbent article 1 are arranged in the second region 7B and the third region 7C between the first region 7A and the fourth region 7D. Among these elastic members, those existing in the second region 7B are called first elastic members 71a, those existing in the third region 7C are called second elastic members 72a, and those existing in the fourth region 7D. It will be referred to as a third elastic member 73a.

第１弾性部材７１ａ、第２弾性部材７２ａ及び第３弾性部材７３ａは何れも、吸収性物品１の左右両側縁（即ち外包材１１の左右両側縁）と吸収性コア４の左右両側縁との間に亘って延在している。そして、吸収性コア４が存在している部位には、第１弾性部材７１ａ及び第２弾性部材７２ａは何れも実質的に存在していない。その結果、第２領域７Ｂ、第３領域７Ｃ及び第４領域７Ｄに形成されるギャザーは、吸収性物品１の左右両側縁と吸収性コア４の左右両側縁との間に位置しており、吸収性コア４が存在する位置にはギャザーが実質的に形成されていない。これにより、着用状態においても吸収性コア４が存在している部位は、第１弾性部材７１ａや第２弾性部材７２ａ及び第３弾性部材７３ａの収縮により外包材１１が縮むことがなく、おむつ１は外観的にも、また吸収性能的にも良好なものとなる。しかし本発明はこの構成に限定されることはなく、第１弾性部材７１ａや第２弾性部材７２ａ及び第３弾性部材７３ａが吸収性物品１の幅方向において実質的に全周に亘って配置されていてもよい。 The first elastic member 71a, the second elastic member 72a, and the third elastic member 73a are all formed between the left and right side edges of the absorbent article 1 (that is, the left and right side edges of the outer packaging material 11) and the left and right side edges of the absorbent core 4. It extends between. And in the site | part in which the absorptive core 4 exists, neither the 1st elastic member 71a and the 2nd elastic member 72a exist substantially. As a result, the gathers formed in the second region 7B, the third region 7C and the fourth region 7D are located between the left and right side edges of the absorbent article 1 and the left and right side edges of the absorbent core 4, Gather is not substantially formed at the position where the absorbent core 4 is present. Thereby, the site | part in which the absorptive core 4 exists also in a wearing condition does not shrink the outer packaging material 11 by shrinkage | contraction of the 1st elastic member 71a, the 2nd elastic member 72a, and the 3rd elastic member 73a, and the diaper 1 Has good appearance and absorption performance. However, the present invention is not limited to this configuration, and the first elastic member 71a, the second elastic member 72a, and the third elastic member 73a are disposed over substantially the entire circumference in the width direction of the absorbent article 1. It may be.

本実施形態の吸収性物品１における各弾性部材としてはそれぞれ、天然ゴム、ポリウレタン系樹脂、発泡ウレタン系樹脂、伸縮性不織布又はホットメルト系伸縮部材等の伸縮性素材を糸状（糸ゴム）、帯状（平ゴム）、ネット状（網状）又はフィルム状に形成したものが好ましく用いられる。 As each elastic member in the absorbent article 1 of the present embodiment, a stretchable material such as natural rubber, polyurethane resin, urethane foam resin, stretchable nonwoven fabric or hot melt stretchable member is used as a thread (thread rubber) or a belt shape. Those formed in the form of (flat rubber), net (net) or film are preferably used.

而して、本実施形態の吸収性物品１においては、第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ及び第４領域７Ｄそれぞれの、おむつ着用時の各領域収縮力が、以下の関係を有している。
即ち、第２領域７Ｂが第３領域７Ｃよりも大きく、第４領域７Ｄが第３領域７Ｃよりも大きく、第２領域７Ｂが第１領域７Ａよりも大きい。ここでいう第１領域の収縮力は、腹側部Ａ側の第１領域７Ａの収縮力と背側部Ｂ側の第１領域７Ａの収縮力の平均値であり、第２領域〜第４領域それぞれの収縮力についても同様である。 Thus, in the absorbent article 1 of the present embodiment, each region contraction force when the diaper is worn in each of the first region 7A, the second region 7B, the third region 7C, and the fourth region 7D has the following relationship. have.
That is, the second region 7B is larger than the third region 7C, the fourth region 7D is larger than the third region 7C, and the second region 7B is larger than the first region 7A. The contraction force of the first region here is an average value of the contraction force of the first region 7A on the abdominal side A side and the contraction force of the first region 7A on the dorsal side B side. The same applies to the contraction force of each region.

また、本実施形態の吸収性物品１においては、第１領域７Ａの前身頃、後身頃を合わせた平均収縮力を１０〜１５０ｃＮとし、第２領域７Ｂの前身頃、後身頃を合わせた平均収縮力を６０〜１５０ｃＮとし、第３領域７Ｃの前身頃、後身頃を合わせた平均収縮力を１０〜１００ｃＮとし、第４領域７Ｄの前身頃、後身頃を合わせた平均収縮力を６０〜１５０ｃＮとしてある。 Moreover, in the absorbent article 1 of this embodiment, the average contraction force that combines the front and back bodies of the first region 7A is 10 to 150 cN, and the average contraction that combines the front and back bodies of the second region 7B. The force is 60 to 150 cN, the average contraction force of the front and back bodies of the third region 7C is 10 to 100 cN, and the average contraction force of the front and back of the fourth region 7D is 60 to 150 cN. is there.

従来、パンツ型おむつの着用中のずれ落ちを防止するためには、特に幼児用のパンツ型使い捨ておむつの着用中のずれ落ちを防止するためには、ウエスト開口部に配設する弾性部材の締め付け圧を高くして、該ウエスト開口部によってパンツ型おむつを着用者の身体に密着させることが有効であると考えられてきた（例えば、先に述べた特許文献２参照）。しかし本発明者らの検討の結果、パンツ型おむつの着用中のずれ落ちを効果的に防止するためには、ウエスト開口部の収縮力、即ち本実施形態においては第１領域７Ａの収縮力を高くするよりも、第２領域７Ｂおよび第４領域７Ｄの収縮力を高くし、第１領域７Ａや第３領域７Ｃの収縮力を低く設定することが有効であることが見出された。 Conventionally, in order to prevent slipping while wearing a pants-type diaper, particularly to prevent slipping while wearing a pants-type disposable diaper for infants, tightening an elastic member disposed in the waist opening It has been considered effective to increase the pressure and bring the pant-type diaper into close contact with the wearer's body through the waist opening (for example, see Patent Document 2 described above). However, as a result of the study by the present inventors, in order to effectively prevent slippage during wearing of the pants-type diaper, the contraction force of the waist opening, that is, the contraction force of the first region 7A in the present embodiment is set. It has been found that it is more effective to increase the contraction force of the second region 7B and the fourth region 7D and to set the contraction force of the first region 7A and the third region 7C to be lower than to increase it.

この理由は、第２領域７Ｂおよび第４領域７Ｄが関与する身体の領域は骨が体表近くまで突出している領域であり、また身体の括れが存在する領域であるため、この領域の収縮力を高めることで吸収性物品の重量を支える支点を形成できるためである。また第１領域７Ａにおいては、着用者、特に幼児は、その身体的な特徴として腹まわりが張り出しているので、当該張り出している腹まわりに当接するウエスト開口部の収縮力を高くすると、その収縮力が高い故にウエスト開口部が次第に絞り込まれて、腹まわりが細くなる部位にまで該ウエスト開口部がずれ下がってくるからである。 The reason for this is that the body region in which the second region 7B and the fourth region 7D are involved is a region where bones protrude to the surface of the body, and a region where the body is constricted. This is because a fulcrum that supports the weight of the absorbent article can be formed by increasing. Further, in the first region 7A, the wearer, particularly an infant, has an abdominal circumference protruding as a physical feature thereof, and if the contraction force of the waist opening abutting on the protruding abdomen is increased, the contraction is increased. This is because the waist opening is gradually narrowed down due to the high force, and the waist opening is shifted down to a portion where the abdomen becomes thinner.

さらに第３領域７Ｃは、吸収性物品１を着用したときに着用者の骨盤が体表近くまで存在していない部位であり、皮膚の動作による変動が大きい領域であるため、収縮力を低くすることでパンツ型吸収性物品のはき心地が良くなりずれ落ちにくくなるためである。 Further, the third region 7C is a region where the wearer's pelvis does not exist close to the body surface when the absorbent article 1 is worn, and is a region that varies greatly due to the movement of the skin. This is because the comfort of the pants-type absorbent article is improved and it is difficult to slip off.

前述した通り、本実施形態の吸収性物品１においては、第１領域７Ａの前身頃、後身頃を合わせた平均収縮力を１０〜１５０ｃＮとし、第２領域７Ｂの前身頃、後身頃を合わせた平均収縮力を６０〜１５０ｃＮとし、第３領域７Ｃの前身頃、後身頃を合わせた平均収縮力を１０〜１００ｃＮとし、第４領域７Ｄの前身頃、後身頃を合わせた平均収縮力が６０〜１５０ｃＮである。 As described above, in the absorbent article 1 of the present embodiment, the average contraction force of the front and back bodies of the first region 7A is 10 to 150 cN, and the front and back bodies of the second region 7B are combined. The average contraction force is 60 to 150 cN, the average contraction force that combines the front and back bodies of the third region 7C is 10 to 100 cN, and the average contraction force that combines the front and back bodies of the fourth region 7D is 60 to 150 cN.

第１領域７Ａの前身頃、後身頃を合わせた平均収縮力が１５０ｃＮ以上、第３領域７Ｃの前身頃、後身頃を合わせた平均収縮力が１００ｃＮ以上であると、着用者の身体を過度に締め付けてしまうほか、吸収性物品１の装着操作が困難になってしまう。また着用によって弾性部材の跡が肌に残ってしまう。この観点から、吸収性物品１の第１領域７Ａの前身頃、後身頃を合わせた平均収縮力が１５０ｃＮ以下、第３領域７Ｃの前身頃、後身頃を合わせた平均収縮力が１００ｃＮ以下であることが重要である。 If the average contraction force of the front and back bodies of the first region 7A is 150 cN or more, and the average contraction force of the front and back of the third region 7C is 100 cN or more, the wearer's body is excessively Besides tightening, the mounting operation of the absorbent article 1 becomes difficult. Moreover, the trace of an elastic member will remain in skin by wearing. From this point of view, the average contraction force of the front and back bodies of the first region 7A of the absorbent article 1 is 150 cN or less, and the average contraction force of the third region 7C and the front and back bodies is 100 cN or less. This is very important.

また、第２領域７Ｂおよび第４領域７Ｄの前身頃、後身頃を合わせた平均収縮力が６０ｃＮ以下であると、吸収性物品１の第２領域７Ｂおよび第４領域７Ｄにおいて吸収性物品の重量を支えるための支点の形成が困難となり、その結果、吸収性物品１がずれ落ちてしまい、着用状態での吸収性物品１の外観が非常に低下してしまう。特に、吸収性物品１の股下部Ｃでのだぶつきが顕著になってしまい、また尿および便の漏れの原因となる。 Moreover, the weight of an absorbent article in the 2nd area | region 7B and the 4th area | region 7D of the absorbent article 1 as the average contraction force which combined the front body and back body of 2nd area | region 7B and 4th area | region 7D is 60 cN or less. As a result, it is difficult to form a fulcrum for supporting the absorbent article 1, and the absorbent article 1 is slipped off, and the appearance of the absorbent article 1 in a worn state is extremely deteriorated. In particular, the looseness at the crotch part C of the absorbent article 1 becomes prominent and also causes leakage of urine and feces.

一方、第２領域７Ｂおよび第４領域７Ｄにおける吸収性物品１の着用時の収縮力が１５０ｃＮ超であると、着用者の身体を過度に締め付けてしまうほか、おむつ１の装着操作が困難になってしまう。また着用によって弾性部材の跡が肌に残ってしまう。 On the other hand, when the absorbent force of the absorbent article 1 in the second region 7B and the fourth region 7D exceeds 150 cN, the wearer's body is excessively tightened, and the wearing operation of the diaper 1 becomes difficult. End up. Moreover, the trace of an elastic member will remain in skin by wearing.

吸収性物品１のはき心地の良さを向上させ、また着用状態での吸収性物品１の外観や吸収性物品１の装着操作を一層向上させる観点から、第１領域７Ａの前身頃、後身頃を合わせた平均収縮力は１０〜１５０ｃＮであることが好ましく２０〜８０ｃＮであることが更に好ましい。
また第２領域７Ｂの前身頃、後身頃を合わせた平均収縮力は吸収性物品の重量に対する支点を形成させ、弾性部材の跡を防止させる観点から６０〜１５０ｃＮであることが好ましく６０〜１２０ｃＮであることが更に好ましい。
さらに第３領域７Ｃの前身頃、後身頃を合わせた平均収縮力は吸収性物品１のはき心地の良さを向上させ、また着用状態での吸収性物品１の外観や吸収性物品１の装着操作を一層向上させる観点から、１０〜１００ｃＮであることが好ましく１０〜４０ｃＮであることが更に好ましい。
第４領域７Ｄの前身頃、後身頃を合わせた平均収縮力は吸収性物品の重量に対する支点を形成させ、弾性部材の跡を防止させる観点から６０〜１５０ｃＮであることが好ましく、６０〜１２０ｃＮであることが更に好ましい。
第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ、第４領域７Ｄの４つの領域における吸収性物品１の着用時の収縮力は、例えば第１弾性部材７１ａの素材、太さや伸長率、或いは配設間隔を調整することでコントロールすることができる。 From the viewpoint of improving the wear comfort of the absorbent article 1 and further improving the appearance of the absorbent article 1 in the wearing state and the mounting operation of the absorbent article 1, the front body and the back body of the first region 7A The average shrinkage force is preferably 10 to 150 cN, more preferably 20 to 80 cN.
Moreover, it is preferable that it is 60-150 cN from the viewpoint of forming the fulcrum with respect to the weight of an absorbent article, and the average contractive force which match | combined the front body of the 2nd area | region 7B with the back body, and preventing the trace of an elastic member. More preferably it is.
Further, the average shrinkage force of the front and back bodies of the third region 7C improves the comfort of the absorbent article 1, and the appearance of the absorbent article 1 in the worn state and the wearing of the absorbent article 1 From the viewpoint of further improving the operation, it is preferably 10 to 100 cN, and more preferably 10 to 40 cN.
The average shrinkage force of the front and back bodies of the fourth region 7D is preferably 60 to 150 cN from the viewpoint of forming a fulcrum with respect to the weight of the absorbent article and preventing the trace of the elastic member, and 60 to 120 cN. More preferably it is.
The shrinkage force when wearing the absorbent article 1 in the four regions of the first region 7A, the second region 7B, the third region 7C, and the fourth region 7D is, for example, the material, thickness and elongation rate of the first elastic member 71a, Alternatively, it can be controlled by adjusting the arrangement interval.

本実施形態のおむつ１は、第４領域７Ｄの収縮力（腹側部と背側部との平均）が、第２領域７Ｂの収縮力（腹側部と背側部との平均）よりも大きいかほぼ等しい。
かかる構成により、おむつのズレ落ちを効果的に抑制できるだけでなく、従来のパンツ型おむつの課題であったゴム跡つきや肌の赤みを低減することができる。
尚、第４領域７Ｄと第２領域７Ｂの収縮力がほぼ等しい場合には、第２領域７Ｂの方が収縮力が大きい（場合がある）が、第４領域７Ｄの収縮力と第２領域７Ｂの収縮力との差が、１０ｃＮ以下である場合が含まれる。 In the diaper 1 of the present embodiment, the contraction force of the fourth region 7D (average of the ventral side portion and the back side portion) is greater than the contraction force of the second region 7B (average of the ventral side portion and the dorsal side portion). Big or nearly equal.
With such a configuration, not only can the slippage of the diaper be effectively suppressed, but also the rubber marks and redness of the skin, which are the problems of conventional pants-type diapers, can be reduced.
When the contraction force between the fourth region 7D and the second region 7B is substantially equal, the contraction force of the fourth region 7D is larger than the second region 7B. The case where the difference from the contraction force of 7B is 10 cN or less is included.

第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ、第４領域７Ｄの４つの領域における吸収性物品１の収縮力は、（株）ＯＲＩＥＮＴＥＣ社製のテンシロン万能試験機（ＲＴＣ−１２１０Ａ）によって測定される。具体的な測定法は以下の通りである。 The shrinkage force of the absorbent article 1 in the four regions of the first region 7A, the second region 7B, the third region 7C, and the fourth region 7D is measured by a Tensilon universal testing machine (RTC-1210A) manufactured by ORIENTEC. Measured. The specific measurement method is as follows.

［第１領域７Ａ、第２領域７Ｂ、第３領域７Ｃ、第４領域７Ｄの収縮力の測定方法］
おむつを、展開して平面状に拡げ、該おむつを、おむつ幅方向と平行な直線に沿って切断して、腹側部Ａ及び背側部Ｂそれぞれから第１〜第４領域をそれぞれ切り出す。この切り出しの際には、外包材１１のみならず、吸収性本体１０等を含むおむつ全体を切断する。
切り出した各領域（測定サンプル）の長手方向の両端（サイドシール部を形成していた部分のすぐ内側）を、テンシロン引張試験機（ＯＲＩＥＮＴＥＣ社製「ＲＴＣ−１２１０Ａ」）のチャックに挟み、該測定サンプルを３００ｍｍ／ｍｉｎの速度で長手方向に伸長させ、外包材１１の内寸〔弾性部材により外包材のシートが収縮していない状態（換言すれば弾性部材を配さずに外包材のみを伸展させた状態）で測定した外包材１１のサイドシール部間の長さ〕を１００（例えば３５０ｍｍ）としたときの、８０相当（例えば２８０ｍｍ）の長さまで伸長させた後に、７１相当（例えば２５０ｍｍ）の長さまで収縮させたときの引張り荷重（ｃＮ）を収縮力とする。外包材１１の内寸を１００としたときの７１相当の長さにおける戻りの力を規定した理由は、本実施形態のパンツ型使い捨ておむつ１を着用する主たる対象者である幼児の腹回りの長さがおむつ内寸と比して７１％程度となるからである。なお、ここで言う腹回りの長さは、幼児の姿勢が変化したときの腹回りの周長の変化を考慮し、立位および座位で測定した腹回りの平均値である。 [Method for Measuring Contractive Force of First Area 7A, Second Area 7B, Third Area 7C, and Fourth Area 7D]
The diaper is unfolded and spread in a flat shape, the diaper is cut along a straight line parallel to the diaper width direction, and first to fourth regions are cut out from the abdominal side A and the back side B, respectively. When cutting out, not only the outer packaging material 11 but also the entire diaper including the absorbent main body 10 and the like is cut.
Both ends in the longitudinal direction of each cut out region (measurement sample) (immediately inside the portion where the side seal portion was formed) are sandwiched between chucks of a Tensilon tensile tester ("RTC-1210A" manufactured by ORIENTEC), and the measurement is performed. The sample is stretched in the longitudinal direction at a speed of 300 mm / min, and the inner dimension of the outer packaging material 11 [the state of the outer packaging material is not contracted by the elastic member (in other words, only the outer packaging material is extended without providing the elastic member) The length between the side seal portions of the outer packaging material 11 measured in the measured state) is 100 (for example, 350 mm), and is extended to a length corresponding to 80 (for example, 280 mm), and then equivalent to 71 (for example, 250 mm). The tensile load (cN) when contracted to the length of is defined as the contraction force. The reason for defining the return force at a length equivalent to 71 when the inner dimension of the outer packaging material 11 is 100 is the length of the belly circumference of the infant who is the main subject wearing the pants-type disposable diaper 1 of the present embodiment. It is because it becomes about 71% compared with the inner size of the diaper. Note that the length of the abdomen around here is an average value of the abdomen measured in the standing position and the sitting position in consideration of the change in the circumference of the abdomen when the posture of the infant changes.

着用者の腸骨稜９ａから上前腸骨棘９ｂにかけての部位には一定の幅があり、当該幅の範囲内で吸収性物品１の第２領域７Ｂを当該部位に固定することで、また当該幅の範囲内で吸収性物品１の第４領域７Ｄを着用者の大転子９ｃに固定することで吸収性物品１のずれ落ちを効果的に防止することができる。腸骨稜９ａ、上前腸骨棘９ｂ及び大転子９ｃは解剖学の用語である。この観点から、本実施形態の吸収性物品１においては、サイドシール部Ｓの長さを９０〜１４０ｍｍなしている。この幅が９５〜１３５ｍｍ、特に９５〜１３０ｍｍであると、吸収性物品１のずれ落ちを一層効果的に防止することができ、また着用状態での吸収性物品１の外観や吸収性物品１の装着操作（はかせやすさ等）を一層向上させることができる。 A portion from the wearer's iliac crest 9a to the upper anterior iliac spine 9b has a certain width, and the second region 7B of the absorbent article 1 is fixed to the portion within the width, and By fixing the fourth region 7D of the absorbent article 1 to the wearer's greater trochanter 9c within the range of the width, it is possible to effectively prevent the absorbent article 1 from slipping off. The iliac crest 9a, superior anterior iliac spine 9b, and greater trochanter 9c are anatomical terms. From this viewpoint, in the absorbent article 1 of the present embodiment, the length of the side seal portion S is 90 to 140 mm. When this width is 95 to 135 mm, particularly 95 to 130 mm, it is possible to more effectively prevent the absorbent article 1 from slipping off, and the appearance of the absorbent article 1 in the worn state and the absorbent article 1. It is possible to further improve the mounting operation (ease of easiness).

吸収性物品１においては、サイドシール部Ｓの長さに加えて、吸収性物品１の展開状態における長手方向の全長Ｌが４４０〜５３０ｍｍになされている。前述したように、第２領域および第４領域が吸収性物品の重量を支える支点を形成している限りにおいては、それ以外の部分（第１領域および第３領域）の収縮力を高めても吸収性物品のずれ落ちに対してほとんど効果はなく、第１領域や第３領域の収縮力が強いと動作による皮膚の変動で吸収性物品が下がってきてしまうという不具合が生じる。
また吸収性物品装着時の「すっきり感」を高める観点から、第１領域の吸収性物品長手方向長さは極力短くすることが望ましい。
しかし、衣服として吸収性物品を考えた場合、第１領域にはある程度の長さが必要となる。本発明者らが種々の検討の行ったところ、吸収性物品１の展開状態における長手方向の全長Ｌを４４０〜５３０ｍｍにすることで、吸収性物品着用時の衣服としての「安心感」及び「はき心地」を損なうことなく、おむつ着用時において第２領域および第４領域を骨が体表近くまで突出している部位に当接させることができ、「ずれ落ち防止性」をも兼ね備えた吸収性物品を得ることができることを見出した。
着用時における「安心感」、「はき心地」及び「ずれ落ち防止性」を更に向上させるためには、吸収性物品１の展開状態における長手方向の全長Ｌを４５０〜５２０ｍｍにすることが好ましく、４６０〜５１５ｍｍにすることが更に好ましい。 In the absorbent article 1, in addition to the length of the side seal portion S, the total length L in the longitudinal direction in the deployed state of the absorbent article 1 is set to 440 to 530 mm. As described above, as long as the second region and the fourth region form a fulcrum that supports the weight of the absorbent article, the contraction force of other portions (the first region and the third region) can be increased. There is almost no effect on the slippage of the absorbent article, and if the contraction force in the first region or the third region is strong, there arises a problem that the absorbent article is lowered due to skin fluctuation caused by the operation.
Further, from the viewpoint of enhancing the “clean feeling” when the absorbent article is mounted, it is desirable that the length of the first region in the longitudinal direction of the absorbent article is as short as possible.
However, when an absorbent article is considered as clothing, the first region needs a certain length. As a result of various studies conducted by the present inventors, the total length L in the longitudinal direction in the deployed state of the absorbent article 1 is set to 440 to 530 mm, so that “safety” and “ Without impairing the "comfort", the second and fourth regions can be brought into contact with the part where the bone protrudes close to the surface of the body when wearing a diaper. It has been found that a sex product can be obtained.
In order to further improve the “feeling of security”, “feeling to wear” and “preventing slip-off” at the time of wearing, it is preferable that the total length L in the longitudinal direction in the deployed state of the absorbent article 1 is 450 to 520 mm. 460 to 515 mm is more preferable.

吸収性物品１を着用した状態で、第２領域７Ｂおよび第４領域７Ｄが着用者の骨が体表近くまで突出している部位に当接するようにするためには、吸収性物品１の寸法と着用者の体格との関係が重要である。
例えばパンツ型吸収性物品の主たる着用対象者である幼児を考えた場合、吸収性物品１の展開状態において、腹側部Ａの第２領域７Ｂの中心位置（吸収性物品１の長手方向に沿う中心位置）と吸収性物品１の長手方向中心線ＣＬとの間の距離Ｋ１を好ましくは１８０〜２２０ｍｍとし、また吸収性物品１の展開状態において、背側部Ｂの第２領域７１の中心位置（吸収性物品１の長手方向に沿う中心位置）と吸収性物品１の長手方向中心線ＣＬとの間の距離Ｋ２を好ましくは１８０〜２２０ｍｍとすることで、第２領域７Ｂおよび第４領域７Ｄを着用者の骨が体表近くまで突出している部位に首尾良く当接させることができる。 In order for the second region 7B and the fourth region 7D to come into contact with the portion where the wearer's bone protrudes close to the body surface while wearing the absorbent article 1, the dimensions of the absorbent article 1 and The relationship with the wearer's physique is important.
For example, when an infant who is a main wear target person of a pants-type absorbent article is considered, the center position of the second region 7B of the abdominal side A (along the longitudinal direction of the absorbent article 1) in the deployed state of the absorbent article 1 The distance K1 between the center position) and the longitudinal center line CL of the absorbent article 1 is preferably 180 to 220 mm, and the center position of the second region 71 of the back side B in the deployed state of the absorbent article 1 By setting the distance K2 between the (center position along the longitudinal direction of the absorbent article 1) and the longitudinal center line CL of the absorbent article 1 to be preferably 180 to 220 mm, the second region 7B and the fourth region 7D. Can be successfully brought into contact with the site where the wearer's bone protrudes close to the body surface.

この値はパンツ吸収性物品の主たる着用対象者である幼児約３５０人の身体計測を実施して決定されたものである。具体的には図５に示すように、上前腸骨棘の水平位置高さにある腹側部左右中心点を上前腸骨棘高前中心とし、背側部を上前腸骨棘高後中心とすると、上前腸骨棘高前中心から股下を経由し上前腸骨棘高後中心までの長さを上前腸骨棘高前後長とし、この上前腸骨棘高前後長に吸収性物品の材料による厚み等を考慮した必要長を加えて得られた数値を二分したものである。当該距離Ｋ１およびＫ２を１８５〜２１５ｍｍ、特に１９０〜２１５ｍｍとすることで、第２領域７Ｂおよび第４領域７Ｄが着用者の骨が体表近くまで突出している部位に当接させることができる。
第１領域〜第４領域は前身頃Ａ及び後身頃部Ｂに存在するが、前身頃Ａ及び後身頃部Ｂにおける構成は全く同じである必要はない。即ち、第２領域７Ｂにおける前身頃Ａ及び後身頃部Ｂにおける収縮力の平均が、第２領域が第３領域よりも大きく、第４領域が第３領域よりも大きく、第２領域が第１領域よりも大きいことを満たせば、弾性体の素材、太さ、伸長率、配設間隔は前身頃Ａ及び後身頃部Ｂにおいて異なっていてもよい。 This value is determined by carrying out body measurements of about 350 infants who are the main wearees of the pants absorbent article. Specifically, as shown in FIG. 5, the abdominal side left-right center point at the horizontal position height of the upper anterior iliac spine is the upper anterior iliac spine height front center, and the dorsal side is the upper anterior iliac spine height. As the posterior center, the length from the center of the superior anterior iliac spine to the center of the posterior center of the superior anterior iliac spine via the crotch is defined as the longitudinal length of the superior anterior iliac spine. The numerical value obtained by adding the necessary length in consideration of the thickness of the absorbent article and the like is bisected. By setting the distances K1 and K2 to be 185 to 215 mm, particularly 190 to 215 mm, the second region 7B and the fourth region 7D can be brought into contact with a portion where the wearer's bone protrudes close to the body surface.
Although the first region to the fourth region exist in the front body A and the back body part B, the configurations in the front body A and the back body part B do not have to be exactly the same. That is, the average of the contraction force in the front body A and the back body part B in the second region 7B is larger in the second region than the third region, the fourth region is larger than the third region, and the second region is the first. As long as it is larger than the region, the material, thickness, elongation rate, and arrangement interval of the elastic body may be different in the front body A and the back body B.

本発明において、おむつ１の長手方向中心線ＣＬとは、おむつ１の腹側部Ａの両側縁Ａ１，Ａ２と背側部Ｂの両側縁Ｂ１，Ｂ２とが実質的にずれることなく互いに接合されている場合においては、おむつ１の展開状態におけるＡ１、Ｂ１の中点を通るおむつ幅方向に沿う直線のことをいう（図３参照）。これと異なり、例えば図６（ａ）及び（ｂ）に示すように、腹側部Ａの両側縁Ａ１，Ａ２が、背側部Ｂの両側縁Ｂ１'，Ｂ２'と接合されておらず、両側縁Ｂ１'，Ｂ２'よりも長手方向内方の位置であるＢ１，Ｂ２において接合されている場合においては、Ｂ１，Ｂ２からＢ１'，Ｂ２'にかけての領域をないものと仮定した上で、前述と同様に、おむつの長手方向中心線を定める。
吸収性物品１においては、吸収性物品１着用時のレッグ開口部６の圧力が、１．０〜２．４ｋＰａ、特に１．２〜２．２ｋＰａとなされていることが好ましい。吸収性物品着用時のレッグ開口部６の圧力が前記範囲内であることによって、レッグ開口部６の開口端が着用者の鼠蹊部に適正にフィットし、着用者の脚周りからの液漏れを効果的に防止することができる。
また、使用時において排尿／排便に起因して吸収性物品１の股下における重量が増加しても、股下において吸収性コアが着用者の身体から離間することが防止され、着用中の吸収性物品１の外観も低下及び尿や便の漏れが防止される。その結果、着用状態の吸収性物品１を良好な状態に保つことができる等の効果を得ることができる。 In the present invention, the longitudinal center line CL of the diaper 1 is joined to the side edges A1, A2 of the ventral side A of the diaper 1 and the side edges B1, B2 of the back side B without substantially shifting. In this case, it means a straight line along the diaper width direction passing through the midpoints of A1 and B1 in the unfolded state of the diaper 1 (see FIG. 3). Unlike this, for example, as shown in FIGS. 6A and 6B, both side edges A1 and A2 of the ventral side A are not joined to both side edges B1 ′ and B2 ′ of the back side B, In the case of joining at B1 and B2 which are positions inward in the longitudinal direction from both side edges B1 ′ and B2 ′, assuming that there is no region from B1 and B2 to B1 ′ and B2 ′, As before, a longitudinal centerline of the diaper is defined.
In the absorbent article 1, it is preferable that the pressure of the leg opening 6 when the absorbent article 1 is worn is 1.0 to 2.4 kPa, particularly 1.2 to 2.2 kPa. When the pressure of the leg opening 6 when the absorbent article is worn is within the above range, the opening end of the leg opening 6 fits properly to the wearer's buttocks, and liquid leakage from around the wearer's leg is prevented. It can be effectively prevented.
Further, even when the weight of the absorbent article 1 in the crotch increases due to urination / defecation during use, the absorbent core is prevented from separating from the wearer's body in the crotch, and the absorbent article being worn The appearance of 1 is also reduced and leakage of urine and feces is prevented. As a result, it is possible to obtain an effect such that the worn absorbent article 1 can be kept in a good state.

［レッグ開口部の装着圧の測定方法］
装着圧測定装置（（株）エイエムアイ・テクノ製の接触圧測定器（ＡＭＩ３０３７−２））を用い、吸収性物品１のレッグ開口部６に周長３００ｍｍの円筒を挿入（装着）し、弾性部材６１ａ，６１ｂが配置された部位にて円周方向にφ＝１５ｍｍのエアパックを用い５０ｍｍ間隔で６点測定を行う。弾性部材６１ａ，６１ｂが複数本存在する場合は、該弾性部材が配置されている領域の幅中心点にて測定を行う。右足および左足計１２点の平均値をレッグ開口部６の装着圧とする。レッグ部弾性部材６１ａ，６１ｂが完全に、あるいは部分的にないものに関しては相当部位における側方カフス弾性部材８１が配置されている領域の装着圧をもってレッグ開口部の装着圧とする。
円筒の周長を３００ｍｍとした理由は、本実施形態の吸収性物品１を着用する主たる対象者である幼児の鼠蹊部（足まわり）の長さの平均がおおよそ３００ｍｍであることによる。 [Measuring method of mounting pressure at leg opening]
Using a mounting pressure measuring device (contact pressure measuring device (AMI3037-2) manufactured by AIM Techno Co., Ltd.), a cylinder having a circumferential length of 300 mm is inserted (mounted) into the leg opening 6 of the absorbent article 1, and an elastic member 6 points are measured at intervals of 50 mm using an air pack of φ = 15 mm in the circumferential direction at the part where 61a and 61b are arranged. When there are a plurality of elastic members 61a and 61b, measurement is performed at the center point of the width of the region where the elastic members are arranged. The average value of 12 points on the right foot and left foot is taken as the mounting pressure of the leg opening 6. For those where the leg elastic members 61a and 61b are not completely or partially, the mounting pressure in the region where the side cuff elastic members 81 are disposed in the corresponding portion is used as the mounting pressure of the leg opening.
The reason why the circumference of the cylinder is 300 mm is that the average length of the buttocks (foot circumference) of the infant who is the main subject wearing the absorbent article 1 of the present embodiment is approximately 300 mm.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記実施形態に制限されるものではない。例えば前記実施形態の吸収性物品１においては、第１弾性部材７１ａ又は第２弾性部材７２ａが吸収性物品１の左右両側縁と吸収性コア４の左右両側縁との間のみに配されているが、この構成に限定されることはなく、吸収性コア４の左右両側縁部のみ各弾性部材７１ａ又は７２ａの一部を重ねることもできるし、吸収性物品の幅方向全長に亘って配置させることもできる。この場合には、吸収性コア４と重なる部分の外包材１１には第１又は第２弾性部材により収縮させる力が働くことになる。しかしそのような場合においても、吸収性コア４が配されている領域に位置する外包材１１を、粘着剤により吸収性コア４に貼り付けることで、吸収性コア４の剛性を利用して弾性部材の収縮を抑制し、吸収性コア４が配された部分における外包材１１に皺が発生することを防止することができる。 As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the absorbent article 1 of the embodiment, the first elastic member 71a or the second elastic member 72a is disposed only between the left and right side edges of the absorbent article 1 and the left and right side edges of the absorbent core 4. However, the present invention is not limited to this configuration, and a part of each elastic member 71a or 72a can be overlapped only at the left and right side edges of the absorbent core 4, or arranged across the entire length in the width direction of the absorbent article. You can also. In this case, a force of contraction by the first or second elastic member acts on the outer packaging material 11 in a portion overlapping the absorbent core 4. However, even in such a case, the outer packaging material 11 located in the region where the absorbent core 4 is disposed is adhered to the absorbent core 4 with an adhesive, and thus the elasticity of the absorbent core 4 is utilized. The shrinkage of the member can be suppressed, and wrinkles can be prevented from occurring in the outer packaging material 11 in the portion where the absorbent core 4 is disposed.

また、股下部Cに、レッグ開口部の周縁部に沿うレッグ部弾性部材６１ａ，６１ｂが配されていなくても良い。本発明におむつは、優れたずれ防止性能を有するため、レッグ部弾性部材６１ａ，６１ｂを無くしても、レッグ開口部からの漏れが生じ難い。 Further, the leg elastic members 61a and 61b along the peripheral edge of the leg opening may not be arranged on the crotch C. Since the diaper of the present invention has excellent slip prevention performance, leakage from the leg opening is unlikely to occur even if the leg elastic members 61a and 61b are omitted.

また、外層及び内層不織布１２，１３に挟持固定されている第１弾性部材７１ａ又は第２弾性部材７２ａを、吸収性コア４が配されている部分だけは、不織布１２，１３に殆ど固定させないことによっても、吸収性コア４が配された部分における外包材１１に皺が発生することを防止することもできる。 Also, the first elastic member 71a or the second elastic member 72a sandwiched and fixed between the outer layer and inner layer nonwoven fabrics 12 and 13 should be hardly fixed to the nonwoven fabrics 12 and 13 only at the portion where the absorbent core 4 is arranged. Also, it is possible to prevent wrinkles from occurring in the outer packaging material 11 in the portion where the absorbent core 4 is disposed.

また外包材１１においては、内層不織布１３及び外層不織布１２の何れか一方だけを、撥水性不織布とすることが可能である。また側方カフス８で十分な防漏性を確保できる場合には、内層不織布１３及び外層不織布１２の両方に透水性不織布も用いることも可能である。 In the outer packaging material 11, only one of the inner layer nonwoven fabric 13 and the outer layer nonwoven fabric 12 can be a water repellent nonwoven fabric. In addition, when the side cuff 8 can ensure sufficient leak-proof property, a water-permeable nonwoven fabric can be used for both the inner layer nonwoven fabric 13 and the outer layer nonwoven fabric 12.

以下、実施例により本発明を更に詳細に説明する。しかしながら本発明の範囲はかかる実施例に制限されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

〔実施例１、２及び比較例１から比較例３〕
下記表１に示す第１〜第４領域を腹側部及び背側部に有するパンツ型使い捨ておむつを製造した。なお、この際レッグ開口部６に弾性部材を導入しないことで、ウエスト開口部からレッグ開口部までの胴回り領域の収縮力の影響を明らかにした。吸収性本体１０における表面シート２は、坪量２５ｇ／ｍ²の親水性エアースルー不織布から構成されていた。裏面シート３は、坪量２０ｇ／ｍ²のポリエチレンシートから構成されていた。また外包材１１における外層不織布１２は、坪量２５ｇ／ｍ²の撥水性エアースルー不織布から構成されており、内層不織布１３は、坪量１８ｇ／ｍ²の撥水性スパンボンド不織布から構成されていた。各例とも、腹側部Ａ及び背側部Ｂそれぞれについて、第１及び２領域には６本、第３及び４領域には５本の弾性部材を配した。第１、２領域においては６本、第３，４領域においては５本導入されている各弾性部材によって生じる収縮力は、最細で３１０dtexの糸ゴムから最太で平ゴムまでの弾性部材の種類を用い、その伸長率を変えることで変化させた。得られたおむつにおける各値を表１に示す。
得られたおむつを１〜２才相当のベビー動的モデルに装着させ、以下の評価を行った。
[Examples 1 and 2 and Comparative Examples 1 to 3]
The underpants-type disposable diaper which has the 1st-4th area | region shown in following Table 1 in an abdominal side part and a back side part was manufactured. At this time, by not introducing an elastic member into the leg opening 6, the influence of the contraction force in the waistline region from the waist opening to the leg opening was clarified. The surface sheet 2 in the absorbent main body 10 was composed of a hydrophilic air-through nonwoven fabric having a basis weight of 25 g / m ² . The back sheet 3 was composed of a polyethylene sheet having a basis weight of 20 g / m ² . Moreover, the outer layer nonwoven fabric 12 in the outer packaging material 11 was composed of a water-repellent air-through nonwoven fabric having a basis weight of 25 g / m ² , and the inner layer nonwoven fabric 13 was composed of a water-repellent spunbond nonwoven fabric having a basis weight of 18 g / m ² . . In each example, for the ventral portion A and the dorsal portion B, six elastic members were arranged in the first and second regions, and five elastic members were arranged in the third and fourth regions. The contraction force generated by the elastic members introduced in the first and second regions, six in the third and fourth regions, and five in the third and fourth regions, is that of the elastic member from the thinnest 310 dtex rubber thread to the thickest flat rubber. The type was used and changed by changing the elongation rate. Table 1 shows each value in the obtained diaper.
The obtained diaper was attached to a baby dynamic model corresponding to 1 to 2 years old, and the following evaluation was performed.

〔評価〕
（１）ずれ落ちにくさ（ベビー動的モデルによるずれ落ち評価によりウエストの装着位置が９０ｍｍ以下であったかどうか）
○：ずれ落ちにくい（ウエストの装着位置の変化が９０ｍｍ以下である）
×：ずれ落ちやすい（ウエストの装着位置の変化が９０ｍｍ以上である）
（２）外観（ベビー動的モデル装着時に腹側と背側の収縮力の違いによるひきつれ感や、ずれ落ちたあとの製品の折り重なりによるもたつきを起こしていないかどうか）
○：良好
×：問題あり [Evaluation]
(1) Difficult to slip off (Waist wearing position was 90 mm or less by slip evaluation by baby dynamic model)
○: It is difficult to slip off (change in waist mounting position is 90 mm or less)
X: Easily slipped off (change in waist mounting position is 90 mm or more)
(2) Appearance (whether there is a feeling of pulling due to the difference in contraction force between the abdomen and the dorsal side when the baby dynamic model is mounted, or whether the product has been slackened due to folding of the product after slipping off)
○: Good ×: There is a problem

表１に示す結果から明らかなように、実施例１、２のおむつは、おむつのずれ落ちが起こりにくいものであり、しかも外観に優れるものであることが判る。
これに対して比較例１のおむつは、第２、第４領域にずれ落ちを抑制するための支点を形成することができないためにずれ落ちやすくなっており、ずれ落ち評価後には製品の折り重なりによるもたつきも観察された。
比較例２のおむつは、第２領域にしか支点を形成できず、ずれ落ちやすい。
比較例３のおむつは、第４領域にしか支点を形成できず、ずれ落ちやすい。

As is apparent from the results shown in Table 1, it can be seen that the diapers of Examples 1 and 2 are less likely to slip out of the diaper and are excellent in appearance.
On the other hand, the diaper of Comparative Example 1 is not easily formed with a fulcrum for suppressing the slip-off in the second and fourth regions, so that it is easy to slip off. Due to the sluggishness was also observed.
The diaper of Comparative Example 2 can form a fulcrum only in the second region, and easily slips off.
The diaper of Comparative Example 3 can form a fulcrum only in the fourth region, and easily slips off.

本発明のパンツ型使い捨ておむつの一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the underpants type disposable diaper of this invention. 図１に示すおむつを組み立てる前の状態を示す分解斜視図である。It is a disassembled perspective view which shows the state before assembling the diaper shown in FIG. 図２における外包材の展開状態を示す平面図である。It is a top view which shows the expansion | deployment state of the outer packaging material in FIG. 腸骨および大転子を示す説明図である。It is explanatory drawing which shows an iliac bone and a greater trochanter. 上前腸骨棘高前後長の測定方法を示す説明図である。It is explanatory drawing which shows the measuring method of upper anterior iliac spine height front and back length. 図６（ａ）は本発明のおむつの別の実施形態を示す斜視図であり、図６（ｂ）は図６（ａ）に示すおむつの展開状態を示す平面図である。Fig.6 (a) is a perspective view which shows another embodiment of the diaper of this invention, FIG.6 (b) is a top view which shows the unfolded state of the diaper shown to Fig.6 (a).

Explanation of symbols

１パンツ型使い捨ておむつ
２表面シート
３裏面シート
４吸収性コア
５ウエスト開口部
６レッグ開口部
１０吸収性本体
１１外包材
７Ａ第１領域
７Ｂ第２領域
７Ｃ第３領域
７Ｄ第４領域
Ａ腹側部
Ｂ背側部
Ｃ股下部 DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorbent core 5 Waist opening 6 Leg opening 10 Absorbent main body 11 Outer packaging material 7A 1st area | region 7B 2nd area | region 7C 3rd area | region 7D 4th area | region A Abdominal side part B Back side C Inseam

Claims

A pants-type absorbent article having an abdominal side part, a crotch part and a back side part, wherein a pair of side seal parts, a waist opening part and a pair of leg opening parts are formed,
Between the upper virtual straight line connecting the upper ends of the uppermost elastic members in each of the pair of side seal portions and the lower virtual straight line connecting the lower ends of the lowermost elastic members of each of the pair of side seal portions The region is divided into four belt-like regions having the same width extending in the absorbent article width direction, and the four belt-like regions are sequentially arranged from the upper virtual straight line side to the lower virtual straight line side. , When the third region and the fourth region,
Each region contraction force when wearing the absorbent article, the second region is larger than the third region, the fourth region is larger than the third region, the second region is larger than the first region,
The contraction force in the fourth region is greater than or substantially equal to the second region,
A 2nd area | region and a 4th area | region are the area | regions which contact | abut to the site | part which a wearer's bone | frame protrudes to the body surface vicinity, respectively .

The pants-type absorbent article according to claim 1, wherein the contraction force in the fourth region is larger than that in the second region.

The contraction force in the fourth region is equal to or smaller than that of the second region, and the difference between the contraction force of the fourth region and the contraction force of the second region is 10 cN or less. The underpants type absorbent article according to claim 1.

The pants-type absorbent article according to any one of claims 1 to 3, wherein an elastic member along the peripheral edge of the leg opening is not disposed in the crotch.