JP4471820B2 - Disposable diapers - Google Patents
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- JP4471820B2 JP4471820B2 JP2004334576A JP2004334576A JP4471820B2 JP 4471820 B2 JP4471820 B2 JP 4471820B2 JP 2004334576 A JP2004334576 A JP 2004334576A JP 2004334576 A JP2004334576 A JP 2004334576A JP 4471820 B2 JP4471820 B2 JP 4471820B2
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- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 206010016275 Fear Diseases 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
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- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
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- 229920001084 poly(chloroprene) Polymers 0.000 description 1
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- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
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- Orthopedics, Nursing, And Contraception (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Description
本発明は、容易にはかせることのできるパンツ型の使い捨ておむつに関する。 The present invention relates to a pants-type disposable diaper that can be easily squeezed.
従来、使い捨ておむつとして、自身で起立したり歩行したりできるようになった子供（高月齢児）用のパンツ型おむつが知られている（特許文献１参照）。 Conventionally, as a disposable diaper, a pants-type diaper for a child (older-aged child) who can stand up or walk by himself is known (see Patent Document 1).
従来、パンツ型の使い捨ておむつは、立たせた状態の幼児に、両レッグ開口部に片足づつ足を通させることによってはかせていた。
このため、寝返りができなかったり、掴まり立ちのできないような低月齢児に着用させること、特に寝かせた状態で履かせることは考慮されていなかった。したがって、低月齢児に好適に用いることのできるパンツ型おむつは未だ提供されていなかった。
Conventionally, a pants-type disposable diaper has been allowed to stand for a standing infant by passing one leg through each leg opening.
For this reason, it has not been considered to be worn by a low-aged child who cannot turn over or cannot stand, especially to be worn in a laid state. Therefore, a pants-type diaper that can be suitably used for low-age children has not been provided yet.
本発明の目的は、脚を過度に締め付けることを防止しつつ、脚周りからの漏れを防止することができ、しかも、おむつを装着する際に、赤ちゃんの足を容易にレッグ開口部に通す事が可能で、容易にはかせることのできる、特に低月齢児用として適したパンツ型の使い捨ておむつを提供することにある。 It is an object of the present invention to prevent leakage from around the legs while preventing the legs from being excessively tightened, and to easily pass the baby's feet through the leg openings when wearing diapers. It is an object of the present invention to provide a pants-type disposable diaper that can be easily squeezed and is particularly suitable for low-age children.
本発明は、液保持性の吸収体を備え、腹側部、股下部及び背側部を有し、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の使い捨ておむつであって、股間幅の最小値Ｌ１と、該股間幅が最小となる部位に位置する、前記各レッグ開口部の開口縁部上の点Ｐから、該開口縁部の腹側部側の端点Ｑまでのおむつ縦方向の距離Ｌ２との比（Ｌ１／Ｌ２）が１．７〜２．２である、使い捨ておむつ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 pants-type disposable diaper comprising a liquid-retaining absorbent body, having an abdominal part, a crotch part and a dorsal part, wherein a waist opening and a pair of leg openings are formed, Diaper from the minimum value L1 of the crotch width and the point P on the opening edge of each leg opening located at the position where the crotch width is minimum to the end point Q on the ventral side of the opening edge The object is achieved by providing a disposable diaper having a ratio (L1 / L2) to a distance L2 in the vertical direction of 1.7 to 2.2.
本発明の使い捨ておむつは、脚を過度に締め付けることをしなくとも、脚周りからの漏れを防止することができ、しかも、おむつを装着する際に、赤ちゃんの足を容易にレッグ開口部に通す事が可能で、赤ちゃんに容易にはかせることができる。
本発明の使い捨ておむつは、特に低月齢児に適しており、しかも寝た状態の新生児にも容易にはかせることができるという利点がある。
The disposable diaper of the present invention can prevent leakage from around the legs without excessively tightening the legs, and also allows the baby's feet to be easily passed through the leg openings when the diapers are worn. It can be done and easily put on the baby.
Disposable diaper of the present invention is especially suited for low age children, yet sleeping in facilitating the state of newborns can be advantageously Kassel.
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。
本発明の一実施形態としての使い捨ておむつ１は、図１に示すように、パンツ型のおむつである。おむつ１は、図２及び図３に示すように、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間に介在された液保持性の吸収体４を有する吸収性本体１０と、該吸収性本体１０の外側（非肌当接面側）に位置して該吸収性本体１０を接合固定している外装体５とを具備し、着用時に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と有している。そして、腹側部Ａの両側縁部と背側部Ｂの両側縁部とがヒートシール、高周波シール、超音波シール等の公知の接合手段により互いに接合されて一対のサイドシール部５０，５０が形成されており、その接
合により、おむつ１にはウエスト開口部７及び一対のレッグ開口部８，８が形成されている。
The present invention will be described below based on preferred embodiments with reference to the drawings.
The disposable diaper 1 as one embodiment of the present invention is a pants-type diaper as shown in FIG. As shown in FIGS. 2 and 3, the diaper 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent 4 interposed between both sheets 2 and 3. It comprises an absorbent main body 10 and an exterior body 5 that is positioned on the outer side (non-skin contact surface side) of the absorbent main body 10 to jointly fix the absorbent main body 10 and is worn by the wearer's stomach. It has an abdominal side A disposed on the side, a back side B disposed on the back side, and a crotch C positioned therebetween. Then, both side edge portions of the ventral side portion A and both side edge portions of the back side portion B are joined to each other by known joining means such as heat seal, high frequency seal, ultrasonic seal, etc., and a pair of side seal portions 50, 50 are formed. Formed.
Accordingly, the diaper 1 is formed with a waist opening 7 and a pair of leg openings 8 and 8.
図２に示すように、吸収性本体１０は縦長矩形状をなし、その長手方向をおむつ１の縦方向（図２の上下方向，おむつ長手方向ともいう）に一致させ、公知の接合手段により外装体５の幅方向中央部に接合されている。吸収体４は、長手方向中央部が括れた砂時計状をなし、表面シート２及び裏面シート３間に挟持固定されている。 As shown in FIG. 2, the absorbent main body 10 has a vertically long rectangular shape, the longitudinal direction of which coincides with the vertical direction of the diaper 1 (also referred to as the vertical direction of FIG. 2 or the diaper longitudinal direction), and is externally covered by a known joining means. It is joined to the central portion in the width direction of the body 5. The absorber 4 has an hourglass shape in which the central portion in the longitudinal direction is constricted, and is sandwiched and fixed between the top sheet 2 and the back sheet 3.
図２及び図３に示すように、吸収性本体１０には、その左右両側部に、長手方向へ延びる一対の第１立体ガード６Ａ，６Ａ及び第２立体ガード６Ｂ，６Ｂが形成されている。図３に示すように、第１立体ガード６Ａは、吸収性本体１０の幅方向内方側に自由端６１Ａを有し且つ外方側に固定端（立ち上がりの基端）６２を有している。自由端６１Ａ近傍には、該自由端６１Ａに沿って、弾性部材６３Ａが伸縮自在に配設されている。一方、第２立体ガード６Ｂは、外装材５との固定端６４を有しており、該固定端６４よりも幅方向外方側に自由端６１Ｂを有している。自由端６１Ｂ近傍には、該自由端６１Ｂに沿って、弾性部材６３Ｂが伸縮自在に配設されている。 As shown in FIGS. 2 and 3, the absorbent main body 10 is formed with a pair of first three-dimensional guards 6A, 6A and second three-dimensional guards 6B, 6B extending in the longitudinal direction on the left and right sides thereof. As shown in FIG. 3, the first three-dimensional guard 6 </ b> A has a free end 61 </ b> A on the inner side in the width direction of the absorbent main body 10 and a fixed end (rising base end) 62 on the outer side. . An elastic member 63A is disposed in the vicinity of the free end 61A so as to be extendable and retractable along the free end 61A. On the other hand, the second three-dimensional guard 6 </ b> B has a fixed end 64 with the exterior material 5, and has a free end 61 </ b> B on the outer side in the width direction than the fixed end 64. In the vicinity of the free end 61B, an elastic member 63B is disposed so as to be stretchable along the free end 61B.
図２及び図３に示すように、外装体５は外層シート５１と内層シート５２との積層体から構成されている。外層シート５１はおむつ１の最外面をなし、内層シート５２は、外層シート５１に隣接しておむつ１の内面側に配されている。外層シート５１は、内層シート５２の前後端縁から前後方向に延出する延出部を有し、それらの延出部はそれぞれ、外装体５の内層シート５２上に吸収性本体１０が配置された後、該吸収性本体１０の前後端を覆うように該吸収性本体１０側に折り返されて接着されている。 As shown in FIGS. 2 and 3, the exterior body 5 is composed of a laminated body of an outer layer sheet 51 and an inner layer sheet 52. The outer layer sheet 51 forms the outermost surface of the diaper 1, and the inner layer sheet 52 is disposed adjacent to the outer layer sheet 51 on the inner surface side of the diaper 1. The outer layer sheet 51 has extending portions extending in the front-rear direction from the front and rear end edges of the inner layer sheet 52, and each of the extending portions has the absorbent main body 10 disposed on the inner layer sheet 52 of the exterior body 5. After that, the absorbent main body 10 is folded back and bonded so as to cover the front and rear ends of the absorbent main body 10.
おむつ１は、図１及び図２に示すように、腹側部Ａ及び背側部Ｂにおける胴回り部Ｄ１，Ｄ２それぞれに一対のサイドギャザー（幅方向に伸縮する伸縮部）９０を有し、それにより、おむつ１の胴回り部Ｄは、その周方向に伸縮性を有している。また、腹側部Ａ及び背側部Ｂにおけるウエスト部Ｅ１，Ｅ２それぞれにウエストギャザー７０を有し、それにより、おむつ１のウエスト部Ｅは、その周方向に伸縮性を有している。 As shown in FIGS. 1 and 2, the diaper 1 has a pair of side gathers (stretchable parts that expand and contract in the width direction) 90 on the waist parts D1 and D2 of the abdominal part A and the back part B, respectively. Therefore, the waist part D of the diaper 1 has elasticity in the circumferential direction. Moreover, it has the waist gathers 70 in each waist part E1, E2 in the abdominal part A and the back part B, and, thereby, the waist part E of the diaper 1 has a stretching property in the circumferential direction.
ウエストギャザー７０は、図１及び図２に示すように、腹側部Ａ及び背側部Ｂにおけるウエスト部Ｅ１，Ｅ２に、ウエスト部弾性部材７１を、それぞれウエスト開口部７の開口縁部７２に沿って延びるように伸長状態で固定して形成されている。
一対のサイドギャザー９０，９０は、腹側部Ａ及び背側部Ｂにおける胴回り部Ｄ１，Ｄ２それぞれに、それぞれ胴回り部Ｄの周方向に向けて、複数本の弾性部材９１を伸長状態で固定して形成されている。これらの弾性部材９１は、少なくとも吸収体４の両側縁よりも幅方向外方の部位に伸長状態で配設固定されており且つ吸収体４と重なる部位の少なくとも幅方向中央部には弾性伸縮性が発現される状態では配設されていない。弾性部材９１は、おむつの幅方向に２つに分割された状態で配置されている。
As shown in FIGS. 1 and 2, the waist gather 70 has waist elastic members 71 on the waist portions E1 and E2 on the abdominal side A and the back side B, and the opening edge 72 of the waist opening 7 respectively. It is formed in a stretched state so as to extend along.
The pair of side gathers 90, 90 fix a plurality of elastic members 91 in an expanded state to the waist portions D 1, D 2 in the abdominal side A and the back side B, respectively, in the circumferential direction of the waist portion D. Is formed. These elastic members 91 are disposed and fixed in an extended state at least on the outer sides in the width direction from both side edges of the absorber 4 and are elastically stretchable at least in the center in the width direction of the portion overlapping the absorber 4. It is not arranged in a state where is expressed. The elastic member 91 is arrange | positioned in the state divided | segmented into two in the width direction of a diaper.
また、レッグ開口部８には、その開口縁部８２に沿ってレッグギャザー８０が形成されている。レッグギャザー８０は、開口縁部８２に沿って複数本の弾性部材８１を伸長状態で固定して形成されている。
以上の各弾性部材７１，８１，９１は何れも外装体５を構成する外層シート５１と内層シート５２との間に挟持固定されている。
A leg gather 80 is formed in the leg opening 8 along the opening edge 82. The leg gather 80 is formed by fixing a plurality of elastic members 81 in an extended state along the opening edge portion 82.
Each of the elastic members 71, 81, 91 is sandwiched and fixed between the outer layer sheet 51 and the inner layer sheet 52 constituting the exterior body 5.
おむつ１は、低月齢児用であり、股上の長さが５０〜２２０ｍｍである。股上の長さＬ４は、展開且つ伸長状態のおむつ全長ＬＴ（図４参照）の１／２の長さである。
ここで、展開且つ伸長状態とは、サイドシール部を引き剥がして、おむつを展開状態とし、その展開状態のおむつを、各部の弾性部材を伸長させて、設計寸法（弾性部材の影響を一切排除した状態で平面状に広げたときの寸法と同じ）となるまで拡げた状態をいう。
The diaper 1 is for low-age children and has a crotch length of 50 to 220 mm. The length L4 of the crotch is ½ of the total length LT (see FIG. 4) in the expanded and extended state.
Here, the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape.
図４に示すように、おむつ１は、股間幅（一対のレッグ開口部８，８の開口縁部８２，８２同士間のおむつ幅方向の距離）Ｌの最小値Ｌ１と、該股間幅Ｌが最小となる部位に位置する、各レッグ開口部８の開口縁部８２上の点Ｐから、レッグ開口部８の開口縁部８２の腹側部Ａ側の端点Ｑまでのおむつ縦方向の距離（おむつ縦方向に沿って測定した距離）Ｌ２との比（Ｌ１／Ｌ２）が１．７〜２．２であり、好ましくは１．８〜２．０である。この範囲とすることで、低月齢児のように脚がくの字型に曲がっているような体型であっても、後述するような装着方法によって寝たままの状態で履かせ易く、履かせた後は***物がレッグ開口部から漏れにくい。 As shown in FIG. 4, the diaper 1 has a crotch width (a distance in the diaper width direction between the opening edges 82 of the pair of leg openings 8, 8) L, and the crotch width L The distance in the vertical direction of the diaper from the point P on the opening edge 82 of each leg opening 8 to the end point Q on the ventral side A side of the opening edge 82 of the leg opening 8, which is located at the smallest part ( The distance (L1 / L2) to the distance L2 measured along the longitudinal direction of the diaper is 1.7 to 2.2, preferably 1.8 to 2.0. By making it within this range, even if it is a body shape that is bent in the shape of a leg like a low-age child, it is easy to put it on while lying down by the wearing method as described later, and it was put on The excrement is less likely to leak from the leg opening.
本発明者らは、従来の高月齢児用パンツ型おむつをそのままサイズダウンして低月齢児に履かせようとしたところ、脚が通しにくいということを見出した。その原因について検討を行ったところ、まずレッグ開口部の伸縮力に原因があることが分かった。つまり、***量が多い高月齢児用おむつではレッグ開口部からの漏れを防ぐために伸縮力が強く配されており、これによって低月齢児を寝かせたままではレッグ開口部が開きにくく、脚を通し難いのである。しかし、この問題を解決すべく開口部の伸縮力を弱くしたところ、***物の漏れが生じ易くなってしまう。つまり、例え伸縮力を小さくしても***物が漏れ難く、かつ低月齢児が寝た状態でも親が履かせ易いようなパンツ型おむつの開発は容易ではなかった。 The inventors of the present invention have found that when a conventional pants-type diaper for high-aged children is reduced in size to be worn by a low-aged child, it is difficult for the legs to pass through. When the cause was examined, it was first found that there was a cause in the stretching force of the leg opening. In other words, diapers for high-aged children with a large amount of excretion are provided with strong stretching force to prevent leakage from the leg opening, which makes it difficult to open the leg opening when the low-aged child is laid, It is difficult. However, when the expansion / contraction force of the opening is weakened to solve this problem, the excrement leaks easily. In other words, it has not been easy to develop a pants-type diaper that makes it difficult for excrement to leak even if the stretching force is reduced, and that a parent can easily wear even when a low-age child is sleeping.
しかし、本発明者らは、種々検討を行ったところ、従来の高月齢児用のパンツ型おむつではＬ１／Ｌ２が小さい（１．７未満）ことと漏れ易さに相関があることを見出した。そこでこの値を大きくしたところ、レッグ開口部からの漏れが劇的に減少することが分かった。しかもその場合には、レッグ開口部に与える伸縮力をあまり強くしなくても十分な漏れ防止性能が得られることも見出したのである。しかし一方で、この値を際限なく大きくしていくと低月齢時のようにくの字に曲がった脚はレッグ開口部に通しにくく、履かせにくくなることも見出した。特に新生児のようにまだ関節の機能が十分に成長していない場合には、脱臼を恐れるあまり履かせるという動機すら失ってしまう。したがって、上記範囲とすることが低月齢児様の体型には漏れ防止と履かせ易さを両立することができて好ましい。 However, as a result of various studies, the present inventors have found that in conventional pants-type diapers for older children, L1 / L2 is small (less than 1.7) and there is a correlation between leakage. . Therefore, when this value was increased, it was found that leakage from the leg opening dramatically decreased. Moreover, in that case, it has also been found that sufficient leakage prevention performance can be obtained even if the stretching force applied to the leg opening is not so strong. However, on the other hand, when this value is increased indefinitely, it has been found that the legs bent in the shape of a circle like those at the time of low age are difficult to pass through the leg openings and are difficult to wear. In particular, when the function of the joint is not sufficiently developed like a newborn baby, even the motivation to wear it too much fears dislocation. Therefore, the above range is preferable for the body shape of a low-age infant because it is possible to achieve both prevention of leakage and ease of wearing.
図４に示すように、おむつ１は、展開且つ伸長状態における全長ＬＴを２等分する中央線（おむつ幅方向に延びる中央線）を境にして、それより腹側部Ａ側の前身頃Ｆとそれより背側部側の後身頃Ｇに区分したときの前記前身頃Ｆに、前記股間幅Ｌが最小となる部位を有している。そして、該部位からおむつ長手方向の前後方向に向かうにつれて股間幅Ｌは漸次増大している。
尚、股間幅Ｌが、おむつ長手方向の所定の長さに亘って最小値を示す場合には、最も長手方向中央に近い部位を股間幅が最小となる部位とする。ただ、この場合には、最小値を示す部位がおむつ長手方向中央から、端部方向に向かっておむつ全長の１／１０以内にあることが好ましい。
As shown in FIG. 4, the diaper 1 has a front body F on the abdominal side A side from a center line (a center line extending in the diaper width direction) that bisects the total length LT in the expanded and extended state. And the front body F when it is divided into the back body G from the back side part has a part where the crotch width L is minimum. The crotch width L gradually increases from the portion toward the longitudinal direction of the diaper longitudinal direction.
In addition, when the crotch width L shows the minimum value over the predetermined length of a diaper longitudinal direction, let the site | part closest to the center of a longitudinal direction be a site | part where a crotch width becomes the minimum. However, in this case, it is preferable that the portion showing the minimum value is within 1/10 of the total length of the diaper from the center in the longitudinal direction of the diaper toward the end.
おむつ１は、股間幅Ｌの最小値Ｌ１と、該股間幅Ｌが最小となる部位に位置する、各レッグ開口部８の開口縁部８２上の点Ｐから、レッグ開口部８の開口縁部８２の腹側部Ａ側の端点Ｑを通るおむつ縦方向の仮想直線Ｌａまでの距離（おむつ幅方向に沿って測定した距離）Ｌ３との比（Ｌ１／Ｌ３）が２．０〜２．５、特に２．２〜２．４であることが好ましい。前記比（Ｌ１／Ｌ３）を上記範囲内とすることで、仰向けに寝た状態の赤ちゃん、特に低月齢児のように左右に開いた両脚の屈曲形状に一層適合した形状になる。 The diaper 1 has an opening edge of the leg opening 8 from a minimum value L1 of the crotch width L and a point P on the opening edge 82 of each leg opening 8 located at a position where the crotch width L is minimum. The ratio (L1 / L3) to the distance (the distance measured along the diaper width direction) L3 to the imaginary straight line La in the diaper vertical direction passing through the end point Q on the ventral side A of 82 is 2.0 to 2.5. In particular, it is preferably 2.2 to 2.4. By setting the ratio (L1 / L3) within the above range, it becomes a shape more suitable for the bent shape of both legs opened to the left and right like a baby lying on his back, particularly a low-aged infant.
また、おむつ１は、図４に示すように、前記点Ｐと前記端点Ｑとを結ぶ仮想直線Ｌｂと、該レッグ開口部８の開口縁部８２とで囲まれた欠円状の領域Ｈの面積をＳ１とし、前記点Ｐを通るおむつ縦方向の仮想直線Ｌｃと、該仮想直線Ｌｃに直交し前記レッグ開口部８の上端部Ｑを通るおむつ幅方向の仮想直線Ｌｄと、前記仮想直線Ｌｂとで囲まれた直角三角形状の領域（領域Ｈと領域Ｊを合わせた領域）の面積をＳ２としたときの両領域の面積比（Ｓ１／Ｓ２）が０．４５〜０．５５、特に０．４６〜０．５０であることが好ましい。前記比（Ｓ１／Ｓ２）を上記範囲内とすることで、おむつを装着する際に、赤ちゃんの足をレッグ開口部に通す事が一層容易となり、足を通した後の引き上げも一層容易となる。 Further, as shown in FIG. 4, the diaper 1 includes a phantom line Hb surrounded by an imaginary straight line Lb connecting the point P and the end point Q and an opening edge 82 of the leg opening 8. An imaginary straight line Lc in the diaper vertical direction passing through the point P, an imaginary straight line Ld in the diaper width direction passing through the upper end Q of the leg opening 8 perpendicular to the imaginary straight line Lc, and the virtual straight line Lb. The area ratio (S1 / S2) of both regions is 0.45 to 0.55, particularly 0, where S2 is the area of a right triangle region (region H and region J) surrounded by It is preferable that it is .46-0.50. By setting the ratio (S1 / S2) within the above range, it is easier to pass the baby's foot through the leg opening when the diaper is worn, and the lifting after passing the foot is also easier. .
尚、本実施形態のおむつ１は、股間幅Ｌの最小値Ｌ１が１５０〜１７０ｍｍ程度、前記距離Ｌ２が７５〜９５ｍｍ程度である。Ｌ１／Ｌ２を前述の範囲とするとともに、Ｌ１及びＬ２をこの範囲とすることで、低月齢児様体型の脚が一層通し易くなる。特にＬ２に関しては上記範囲であるとレッグ開口部から***物が特に漏れ難くなる。 In the diaper 1 of this embodiment, the minimum value L1 of the crotch width L is about 150 to 170 mm, and the distance L2 is about 75 to 95 mm. By making L1 / L2 into the above-mentioned range, and making L1 and L2 into this range, it becomes easier to pass the leg of a low-age child-like body type. In particular, regarding L2, the excrement is particularly difficult to leak from the leg opening when it is in the above range.
また、前記距離Ｌ３は６５〜７５ｍｍ程度、前記面積Ｓ１は１３．５〜１９．０ｃｍ2程度、前記面積Ｓ２は２５．０〜３５．０ｃｍ2程度であることが着用者の脚に対して優しくあたることから好ましい。 Further, the distance L3 is approximately 65 to 75 mm, the area S1 is approximately 13.5 to 19.0 cm 2 , and the area S2 is approximately 25.0 to 35.0 cm 2 with respect to the legs of the wearer. It is preferable from hitting.
本実施形態のおむつ１は、前記点Ｐとレッグ開口部の開口縁部８２の背側部Ｂ側の端点Ｑ’とを結ぶ仮想直線Ｌｅと、該レッグ開口部の開口縁部８２とで囲まれた欠けた円状の領域Ｋの面積をＳ３、該点Ｐを通るおむつ縦方向の仮想直線Ｌｃと、該仮想直線Ｌｃに直交し前記端点Ｑ’を通るおむつ幅方向の仮想直線Ｌｆと、前記仮想直線Ｌｅとで囲まれた直角三角形状の領域（領域Ｋと領域Ｍを合わせた領域）の面積をＳ４としたときの前記両領域の面積比（Ｓ３／Ｓ４）が０．４５〜０．５５、特に０．４６〜０．５０であることが好ましい。 The diaper 1 of the present embodiment is surrounded by a virtual straight line Le that connects the point P and the end point Q ′ on the back side B of the opening edge 82 of the leg opening, and the opening edge 82 of the leg opening. The area of the cut-out circular region K is S3, a virtual straight line Lc in the diaper vertical direction passing through the point P, and a virtual straight line Lf in the diaper width direction perpendicular to the virtual straight line Lc and passing through the end point Q ′, The area ratio (S3 / S4) of the two regions is 0.45 to 0, where S4 is the area of a right triangle region (region K and region M combined) surrounded by the virtual straight line Le. .55, particularly 0.46 to 0.50.
本実施形態のおむつ１は、特に、仰向けに寝た状態の新生児に特に容易にはかせることができる。おむつの装着方法は特に制限されないが、好ましい装着方法の例を以下に示す。 The diaper 1 of the present embodiment can be particularly easily applied to a newborn who is lying on his back. The method for attaching the diaper is not particularly limited, but an example of a preferred method for attaching is shown below.
（装着方法）
図５（ａ）に示すように、一方のレッグ開口部８に一方の手を挿入し、その手で片方の足をつかんで、図５（ｂ）に示すように、その足をレッグ開口部から引きだす。そして、図５（ｃ）に示すように、もう片方の足も同様にして他方のレッグ開口部から引き出す。両足が通ったら、図５（ｄ）に示すように、着用者のウエストまでおむつを引き上げる。このようにして、仰向けに寝た状態の新生児等に、おむつ１を容易に装着することができる。
(Installation method)
As shown in FIG. 5 (a), one hand is inserted into one leg opening 8, and one leg is grasped by that hand, and the leg is opened as shown in FIG. 5 (b). Pull out from. Then, as shown in FIG. 5C, the other leg is similarly pulled out from the other leg opening. When both feet pass, the diaper is pulled up to the wearer's waist as shown in FIG. In this way, the diaper 1 can be easily attached to a newborn or the like lying on his back.
本実施形態のおむつ１によれば、前記比（Ｌ１／Ｌ２）が上記特定の範囲にあることによって、レッグ開口部の形状が、仰向けに寝た状態の赤ちゃん、特に脚が左右に開いている新生児の脚を挿入するのに極めて適したものになっている。
そのため、例えば上述した好ましい装着方法によりおむつを装着する場合に、レッグ開口部に手を挿入して赤ちゃんの足をつかんだ後、その手で赤ちゃんの足をレッグ開口部から引き出す動作を極めて円滑に行うことができる。
また、レッグ開口部の形状が、レッグ開口部を、赤ちゃん、特に新生児の脚に良好にフィットさせるのに特に適したものとなっているため、弾性部材８１によりレッグ開口部に強力な収縮力を付与しなくても、脚周りに充分なフィット性が得られる。そのため、赤ちゃんの脚周りを過度に圧迫することを防止することができる。
According to the diaper 1 of this embodiment, when the ratio (L1 / L2) is in the specific range, the shape of the leg opening portion is a baby sleeping in a supine position, in particular, the legs are opened to the left and right. It is very suitable for inserting the leg of a newborn.
Therefore, for example, when a diaper is worn by the preferred wearing method described above, after inserting the hand into the leg opening and grasping the baby's foot, the operation of pulling out the baby's foot from the leg opening with that hand is very smooth. It can be carried out.
In addition, the shape of the leg opening is particularly suitable for fitting the leg opening to a baby, particularly a newborn's leg, so that the elastic member 81 provides a strong contracting force to the leg opening. Even if it is not applied, a sufficient fit can be obtained around the legs. Therefore, it is possible to prevent excessive pressure around the baby's leg.
また、おむつ１は、上述したレッグギャザー形成用の弾性部材８１の一部８１ａが、腹側部Ａ及び背側部Ｂにおける胴回り部Ｄ１，Ｄ２内のサイドギャザー（伸縮部）９０内まで延在している。伸縮部内まで延在とは、弾性部材８１の一部８１ａが、弾性部材９１が配設されている領域内、具体的には、おむつ縦方向において、相隣接する弾性部材９１同士間まで入り込んでいることを意味する。弾性部材８１の一部８１ａは、腹側部Ａ及び背側部Ｂの何れか一方の伸縮部のみに入り込んでいても良い。 Further, in the diaper 1, a part 81 a of the above-described elastic member 81 for forming leg gathers extends into the side gathers (expandable portions) 90 in the waist portions D <b> 1 and D <b> 2 in the ventral side portion A and the back side portion B. is doing. The term “extends into the stretchable part” means that a part 81a of the elastic member 81 enters between the elastic members 91 adjacent to each other in the region where the elastic member 91 is disposed, specifically, in the vertical direction of the diaper. Means that A part 81a of the elastic member 81 may enter only one of the expansion and contraction parts of the abdominal part A and the back part B.
また、おむつ１は、上述したように、レッグ開口部８には、その開口縁部に沿ってレッグギャザー８０が形成されており、おむつ縦方向の両側に、おむつ縦方向に沿って一対の立体ガード６Ｂ，６Ｂが形成されている。そのため、レッグギャザー開口部の伸縮力をより弱くしても***物の漏れ防止効果は高いので、着用者に優しい感触を与えられる。
尚、このような効果は、少なくとも一対の立体ガードが存在すれば奏される。即ち第１立体ガード及び第２立体ガードの何れか一方のみが存在するような場合にも奏される。
Moreover, as for the diaper 1, as mentioned above, the leg gathers 80 are formed in the leg opening part 8 along the opening edge part, and it is a pair of three-dimensional objects along the diaper longitudinal direction on both sides of the diaper longitudinal direction. Guards 6B and 6B are formed. Therefore, even if the expansion / contraction force of the leg gather opening is further weakened, the excrement leakage preventing effect is high, so that a gentle touch can be given to the wearer.
Such an effect is achieved if at least a pair of solid guards are present. In other words, this is also achieved when only one of the first three-dimensional guard and the second three-dimensional guard is present.
レッグギャザーが形成された部位を最大伸長率から２０％を減じた伸長率迄伸長させたときの引張荷重（以下、レッグギャザーの伸長荷重という。）が１００〜２５０ｃＮ、特に１５０〜２２０ｃＮであることが、ゴム跡が付かずにやさしくフィットする点から好ましい。本発明のおむつは、例えば、このような小さい伸縮応力であってもレッグ開口部からの漏れが十分に抑制される。 The tensile load (hereinafter referred to as the leg gather extension load) when the part where the leg gathers are formed is extended to the extension ratio obtained by subtracting 20% from the maximum extension ratio is 100 to 250 cN, particularly 150 to 220 cN. However, it is preferable from the point that it fits easily without rubber marks. In the diaper of the present invention, for example, even from such a small stretching stress, leakage from the leg opening is sufficiently suppressed.
レッグギャザーの伸長荷重は、以下のようにして測定される。
〔レッグギャザーの伸長荷重の測定方法〕
おむつからレッグ部弾性部材が配されている部位を必要な程度の幅で切り出し、テンシロン引張り試験機を用いておむつ縦方向に対応する方向に伸長させる。本実施形態ではオリエンテック社製のＲＴＡ−１００（株）を使用した。ここで「必要な程度の幅」とは、当該部位の伸長荷重を測定するのに必要な最小限度の幅を言い、必要以上の幅を要しない（例えば、吸収体まで含むような幅で切り出すことは要しない）ことを意味する。
初期チャック間距離は縦方向の自然長（弾性部材を伸長させない自然状態における長さ、初期長）から５０ｍｍを減じた長さとし、サンプルの両端部をそれぞれチャックに挟む。次いで、クロスヘッド移動速度３００ｍｍ／ｍｉｎの条件でサンプルを最大伸長の長さ（弾性部材を固定している部材の自然長長さ）−１０ｍｍのところまで伸長させる。そして、最大伸長率から２０％を減じた伸長率における引張荷重（引張力）を求める。
The elongation load of leg gathers is measured as follows.
[Measurement method of leg gather elongation load]
A part where the leg elastic member is arranged is cut out from the diaper with a necessary width, and is extended in a direction corresponding to the longitudinal direction of the diaper using a Tensilon tensile tester. In this embodiment, RTA-100 manufactured by Orientec Co., Ltd. was used. Here, the “necessary width” means a minimum width necessary for measuring the extension load of the part, and does not require an unnecessarily large width (for example, cut out with a width including the absorber). Means that it is not necessary).
The distance between the initial chucks is a length obtained by subtracting 50 mm from the natural length in the vertical direction (the length in the natural state where the elastic member is not stretched, the initial length), and both ends of the sample are sandwiched between the chucks. Next, the sample is extended to a maximum extension length (natural length of the member fixing the elastic member) −10 mm under the condition of a crosshead moving speed of 300 mm / min. Then, a tensile load (tensile force) at an elongation rate obtained by subtracting 20% from the maximum elongation rate is obtained.
本実施形態のおむつ１の各部を構成する材料としては当該技術分野において通常用いられているものを特に制限なく用いることができる。
例えば表面シート２としては、親水性且つ液透過性の不織布や、開孔フィルムを用いることができる。裏面シート３としては、樹脂フィルムや、樹脂フィルムと不織布等とのラミネート材等を用いることができる。吸収体４としてはフラッフパルプと高吸収性ポリマーの粒子との混合積繊物をティッシュペーパや不織布等（以下、包装材という）でくるんだもの等を用いることができる。立体ガードを構成するシートとしては、撥水性の不織布が好ましく用いられる。外層シート５１及び内層シート５２としては、各種製法による不織布が好ましく用いられる。
As a material which comprises each part of the diaper 1 of this embodiment, what is normally used in the said technical field can be especially used without a restriction | limiting.
For example, as the surface sheet 2, a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used. As the back sheet 3, a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used. As the absorbent body 4, a product obtained by wrapping a mixed fiber of fluff pulp and superabsorbent polymer particles with tissue paper, nonwoven fabric or the like (hereinafter referred to as packaging material) can be used. As the sheet constituting the three-dimensional guard, a water-repellent nonwoven fabric is preferably used. As the outer layer sheet 51 and the inner layer sheet 52, nonwoven fabrics produced by various production methods are preferably used.
各部の弾性部材としては、それぞれ各種公知の弾性部材を用いることができ、例えば、各弾性部材の形態としては、糸状のもの（糸ゴム等）、所定幅の帯状のもの（平ゴム等）、薄膜状のもの等を挙げることができ、弾性部材の形成素材としては、天然ゴムの他、スチレン−ブタジエン、ブタジエン、イソプレン、ネオプレン等の合成ゴム、ＥＶＡ、伸縮性ポリオレフィン、ウレタン等を挙げることができる。
レッグギャザー形成用の前記弾性部材８１としては、平ゴム状のものが好ましく、胴回り部弾性部材９０は糸ゴム状のものが好ましく、ウエスト部弾性部材７１は平ゴム状のものを用いることが好ましい。
As the elastic member of each part, various known elastic members can be used. For example, as the form of each elastic member, a thread-like thing (thread rubber etc.), a belt-like thing of a predetermined width (flat rubber etc.), Examples of materials for forming elastic members include natural rubber, synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, EVA, stretchable polyolefin, urethane, and the like. it can.
The elastic member 81 for forming leg gathers is preferably in the form of a flat rubber, the waistline elastic member 90 is preferably in the form of a rubber thread, and the waist elastic member 71 is preferably in the form of a flat rubber. .
吸収体４は、その曲げ剛性が１〜２５ｃＮ／５０ｍｍであることがはかせる際に赤ちゃんの股間に沿い易く、フィットする点から好ましい。曲げ剛性は、おむつ長手方向の剛性と幅方向の曲げ剛性とがあるが、少なくとも幅方向の曲げ剛性が上記範囲内であることが好ましい。 The absorber 4 is preferable from the point of being easily fit along the crotch of the baby when the bending rigidity is 1 to 25 cN / 50 mm. The bending rigidity includes rigidity in the longitudinal direction of the diaper and bending rigidity in the width direction, but at least the bending rigidity in the width direction is preferably within the above range.
吸収体４の曲げ剛性は、以下のようにして測定することができる。
〔曲げ剛性の測定方法〕
測定にはテンシロン試験機〔（株）オリエンテック社製のＲＴＣ−１１５０Ａ〕を用い、ＪＩＳ規格Ｋ７１７１法（プラスチック−曲げ特性の試験方法）に準拠して測定を行う（Ｒ１＝５．０±０．１ｍｍ、Ｒ２＝５．０±０．２ｍｍ）。
試験片を、エッジスパン間Ｌを５０ｍｍとした支持台の両エッジ間に渡すように置き、試験片に僅かに接するように圧子先端部を配置する。ロードセル５ｋｇ（レンジ２００ｃＮ）、速度３０ｍｍ／ｍｉｎの条件で、圧子を降下させ、荷重−たわみ曲線を得る。得られた曲げ応力の最大値を曲げ剛性値（ｃＮ／５０ｍｍ）とする。
The bending rigidity of the absorber 4 can be measured as follows.
[Measurement method of bending stiffness]
The measurement is performed using a Tensilon tester [RTC-1150A manufactured by Orientec Co., Ltd.] in accordance with JIS standard K7171 method (plastic-bending property test method) (R1 = 5.0 ± 0). 0.1 mm, R2 = 5.0 ± 0.2 mm).
The test piece is placed so as to be passed between both edges of the support base where L between the edge spans is 50 mm, and the tip of the indenter is arranged so as to slightly contact the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range: 200 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm).
〔試験片の調製方法〕
試験片は、吸収性物品から包装材込みの吸収体を取り出し、その長手方向及び幅方向の中央部から、おむつ長手方向に５０ｍｍ、幅方向に８０ｍｍの長方形状に切り出す。曲げ剛性値の単位中の５０ｍｍは試験片の短辺の長さであり、試験時の圧子でたわませた試験片の幅である。試験片は、その長辺を、一方のエッジから他方のエッジに亘る方向に一致させて、両エッジ間に架け渡す。おむつ幅方向の曲げ剛性を測定する場合は、おむつ長手方向８０ｍｍ、幅方向５０ｍｍの試験片を切り出す。曲げ剛性値の単位中の５０ｍｍは試験片吸収性物品から台紙込みの吸収体を取り出せない場合は、不織布、フィルム等の材料を含んだ剛性値と各材料の剛性値を測定し、その値から吸収体の剛性値を計算することで、吸収体剛性値を求める。
[Method for preparing test piece]
A test piece takes out the absorber containing a packaging material from an absorbent article, and cuts out from the center part of the longitudinal direction and the width direction in the rectangular shape of 50 mm in a diaper longitudinal direction, and 80 mm in the width direction. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. The test piece is bridged between both edges, with the long sides thereof aligned in the direction from one edge to the other. When measuring the bending rigidity in the diaper width direction, a test piece having a diaper longitudinal direction of 80 mm and a width direction of 50 mm is cut out. 50 mm in the unit of bending stiffness value, when the absorbent body including the mount cannot be taken out from the test piece absorbent article, measure the stiffness value including materials such as non-woven fabric and film, and the stiffness value of each material. The absorber stiffness value is obtained by calculating the stiffness value of the absorber.
以上、本発明の好ましい一実施形態について説明したが、本発明は、上述した実施形態に制限されず、本発明の趣旨を逸脱しない範囲で種々変更が可能である。
上述したおむつ１は、低月齢児用であり、股上の長さが５０〜２２０ｍｍであったが、本発明の使い捨ておむつは、高月齢児用又は成人用のおむつであっても良い。高月齢児用のおむつの場合は、股上の長さが１００〜３００ｍｍであることが好ましく、成人用のおむつの場合は、股上の長さが２００〜５００ｍｍであることが好ましい。
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
The diaper 1 described above is for a low-age child and the crotch length is 50 to 220 mm. However, the disposable diaper of the present invention may be a diaper for a high-age child or an adult. In the case of diapers for older children, the crotch length is preferably 100 to 300 mm, and in the case of adult diapers, the crotch length is preferably 200 to 500 mm.
＜実施例１＞
図１〜図３に示す形態の使い捨ておむつを製造した。
各部の寸法及び物性値を表１に示した。
The disposable diaper of the form shown in FIGS. 1-3 was manufactured.
The dimensions and physical properties of each part are shown in Table 1.
＜比較例＞
前記比（Ｌ１／Ｌ２）を１．５とした以外は、実施例１と同様にしておむつを製造した（Ｌ１＝１６０ｍｍ，Ｌ２＝１０７ｍｍ）。
<Comparative example>
A diaper was manufactured in the same manner as in Example 1 except that the ratio (L1 / L2) was 1.5 (L1 = 160 mm, L2 = 107 mm).
＜参考例＞
前記比（Ｌ１／Ｌ２）を２．３とした以外は、実施例１と同様にしておむつを製造した（Ｌ１＝１６０ｍｍ，Ｌ２＝１０７ｍｍ）
<Reference example>
The ratio (L1 / L2) is set to 2. A diaper was manufactured in the same manner as in Example 1 except that it was set to 3 (L1 = 160 mm, L2 = 107 mm).
＜性能評価＞
各使い捨ておむつについて、１）新生児に対する装着の容易性、及び２）尿の股モレ防止性能をそれぞれ下記の方法で評価した。結果を表２に示した。
１）装着の容易性（足の通し易さの評価）
〔評価方法〕
各おむつを、上述した装着方法により、新生児モデル（静置様態では脚がくの字に曲がっているもの）に装着し、寝かせた状態でレッグ開口部に足を通す際の通し易さについて評価した。
（評価基準）
足を通す際に、通し易ければ○、通しにくければ×とした。
通し易いというのは、両足とも通し易く、特に片足を通した後に他方の足を通す際にスムーズに通せる事を意味する。通しにくいというのは、両足とも通しにくいが特に片足を通した後に他方の足を通す際に通しにくい事を意味する。
<Performance evaluation>
For each disposable diaper, 1) ease of attachment to a newborn and 2) urine crotch prevention performance were evaluated by the following methods. The results are shown in Table 2.
1) Ease of wearing (evaluation of ease of foot passage)
〔Evaluation methods〕
Each diaper was attached to a newborn baby model (the one bent in a leg shape in the stationary mode) by the above-mentioned mounting method, and evaluated for ease of passing the leg through the leg opening in the laid state. .
(Evaluation criteria)
When passing a leg, it was marked as ○ if it was easy to pass, and × if it was difficult to pass.
“Easy to pass” means that it is easy to pass both feet, and in particular, it can be passed smoothly when passing the other foot after passing one foot. Being difficult to pass means that it is difficult to pass both feet, but it is particularly difficult to pass the other foot after passing one foot.
２）尿の股モレ防止性能（股モレ値の測定）
〔評価方法〕
低月齢モデル（股間部からの人工尿の注入が可能であり、形態的に低月齢児の腰部を模してあるモデル）におむつを装着し、下記方法で股モレ値を測定した。
股モレ値測定においては、先ずおむつを上記の低月齢モデルに装着し、先ず９０°横向きにセットし、そのまま４５°背中側へ倒す。チューブを介して人工尿を５ｇ／秒の速度で３０ｇ注入し、注入後漏れていないかどうかを目視にてチェックした。漏れが生じていないものについては、更に４０ｇの人工尿を同様にして注入し、このような操作を漏れるまで繰り返した。そして、尿の漏れが観察された時点における人工尿の合計注入量を股モレ値とした。
2) Prevention of urine crotch leakage (measurement of crotch leakage value)
〔Evaluation methods〕
A diaper was attached to a low-age model (a model in which artificial urine can be injected from the crotch part and imitatively imitated the waist of a low-age child), and the crotch level was measured by the following method.
In the measurement of the crotch level, first put the diaper on the above-mentioned low-age model, first set it 90 degrees sideways, and tilt it 45 degrees back as it is. 30 g of artificial urine was injected through the tube at a rate of 5 g / second, and it was visually checked whether there was any leakage after injection. For those in which no leakage occurred, 40 g of artificial urine was injected in the same manner, and such an operation was repeated until it leaked. The total amount of artificial urine injected at the time when leakage of urine was observed was taken as the crotch mole value.
表２に示す結果から、実施例の使い捨ておむつは、赤ちゃんの足を通し易くしかも股部からモレにくいことが判る。これに対して、比較例のおむつは、赤ちゃんの足を通し易いが股部に隙間が生じ易く、モレ易い。参考例のおむつは、片方の脚を通した後にもう片方の脚を通すことが困難であるため、赤ちゃんの足を通しづらいことが判る。 From the results shown in Table 2, it can be seen that the disposable diaper of the example is easy to pass the baby's feet and is difficult to leak from the crotch. On the other hand, the diaper of the comparative example is easy to pass the baby's feet, but easily creates a gap in the crotch, and is easy to leak. The diaper of the reference example, because after passing through the legs of pieces how it is difficult to pass through the other end of the leg, it can be seen that the hard through the baby's foot.
１ 使い捨ておむつ
２ 表面シート
３ 裏面シート
４ 吸収体
６Ａ，６Ｂ 立体ガード
７ ウエスト開口部
７０ ウエストギャザー
８ レッグ開口部
８０ レッグギャザー
８２ 開口縁部
９０ サイドギャザー
Ａ 腹側部
Ｂ 背側部
Ｃ 股下部
Ｐ 股間幅が最小となる部位に位置するウエスト開口部の開口縁部上の点
Ｑ ウエスト開口部の開口縁部の腹側部側の端点
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 6A, 6B Solid guard 7 Waist opening 70 Waist gather 8 Leg opening 80 Leg gather 82 Open edge 90 Side gather A A Abdominal side B Back side C Inseam P Points on the opening edge of the waist opening located at the part where the crotch width is the minimum Q The end point on the ventral side of the opening edge of the waist opening
Claims (5)
股間幅の最小値Ｌ１と、該股間幅が最小となる部位に位置する、前記各レッグ開口部の開口縁部上の点Ｐから、該開口縁部の腹側部側の端点Ｑまでのおむつ縦方向の距離Ｌ２との比（Ｌ１／Ｌ２）が１．７〜２．２であり、
前記股間幅の最小値Ｌ１と、前記点Ｐから、前記端点Ｑを通るおむつ縦方向の仮想直線Ｌａまでの距離Ｌ３との比（Ｌ１／Ｌ３）が２．０〜２．５であり、
前記点Ｐと前記端点Ｑとを結ぶ仮想直線Ｌｂと、前記レッグ開口部の開口縁部とで囲まれた領域の面積をＳ１、該点Ｐを通るおむつ縦方向の仮想直線Ｌｃと、該仮想直線Ｌｃに直交し前記端点Ｑを通るおむつ幅方向の仮想直線Ｌｄと、前記仮想直線Ｌｂとで囲まれた領域の面積をＳ２としたときの前記両領域の面積比（Ｓ１／Ｓ２）が０．４５〜０．５５であり、
低月齢児用である使い捨ておむつ。 A pants-type disposable diaper comprising a liquid-retaining absorbent body, having an abdominal part, a crotch part and a dorsal part, wherein a waist opening and a pair of leg openings are formed,
Diaper from the minimum value L1 of the crotch width and the point P on the opening edge of each leg opening located at the position where the crotch width is minimum to the end point Q on the ventral side of the opening edge the ratio of the vertical distance L2 (L1 / L2) is Ri der 1.7 to 2.2,
The ratio (L1 / L3) between the minimum value L1 of the crotch width and the distance L3 from the point P to the virtual straight line La in the diaper longitudinal direction passing through the end point Q is 2.0 to 2.5,
The area of the region surrounded by the virtual straight line Lb connecting the point P and the end point Q and the opening edge of the leg opening is S1, the virtual straight line Lc in the vertical direction of the diaper passing through the point P, and the virtual The area ratio (S1 / S2) of the two regions is 0 when the area of the region surrounded by the virtual straight line Ld in the diaper width direction passing through the end point Q and perpendicular to the straight line Lc and the virtual straight line Lb is S2. .45-0.55,
Disposable diapers for low-age children .
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