JP4428736B2 - Pants-type paper diapers - Google Patents

Description

【００２５】
表１から明らかなように、本発明例の複数本の弾性糸を束ねて固定したシート片２００は、全ての伸長率において、比較例の複数の弾性糸を３〜５ｍｍの間隔を開けて固定したシート片２０１と比べて収縮力が弱くなった。なお、複数本の弾性糸間隔が２ｍｍ以下であれば、本発明例と同様に、複数の弾性糸を３〜５ｍｍの間隔を開けて固定した比較例と比べて収縮力が弱くなることも実験で確かめた。
【００２６】
【発明の効果】
以上の通り、本発明によれば脚周りギャザーを形成する複数本の弾性糸により生ずるおむつ形シート各部の収縮力が適切となる。また、具体的には、下記に示す（イ）〜（ハ）の効果が奏せられる。
（イ）股間部の幅方向の収縮力が弱くなるために、吸収体が幅方向に収縮しにくくなる。よって、被着者に与える不快感を少なくすることができる。
（ロ）弾性糸による腰脇部の収縮力が、被着者の腰に締付け跡が付きにくい程度に弱くなる。
（ハ）各身頃の脚周り部における、複数本の弾性糸間隔が股間部に比べて広いので、被着者の太股に対して十分に強い締め付け力を発揮するとともに、被着者の太股に締付け跡が付きにくい。
【図面の簡単な説明】
【図１】 本発明に係るパンツタイプ紙おむつの展開図である。
【図２】 本発明に係るパンツタイプ紙おむつの正面図である。
【図３】 その側面図である。
【図４】 他の本発明に係るパンツタイプ紙おむつの展開図である。
【図５】 他の本発明に係るパンツタイプ紙おむつの展開図である。
【図６】 従来のパンツタイプ紙おむつの展開図である。
【図７】 従来のパンツタイプ紙おむつの正面図である。
【図８】 その側面図である。
【図９】 実験例で使用したシート片の平面図である。
【符号の説明】
Ｐ…パンツタイプ紙おむつ、１…おむつ形シート、２Ｌ，２Ｒ…前身頃の腰脇部、３Ｌ，３Ｒ…前身頃の脚周り部、４…股間部、５Ｌ，５Ｒ…後身頃の腰脇部、６Ｌ，６Ｒ…後身頃の脚周り部、７…ギャザー、１０…吸収体、１１…透液性トップシート、１２…吸収材、１３…不透液性バックシート、Ｇ１…前身頃側の弾性糸、Ｇ２…後身頃側の弾性糸。[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a plurality of elastic yarns so as to continue from the left waist side part of the front body to the left waist part of the front body, the crotch part, the right leg part of the front body and the right waist side part of the front body. A plurality of elastic yarns that are fixed and continuous from the left waist side of the back body to the right waist side of the back body through the left leg circumference, crotch, and the right leg circumference of the back body Is a paper diaper in which the absorbent body is fixed to the inner surface of the diaper-shaped sheet in which the leg circumference gathers are formed on each of the right leg circumference and the left leg circumference. The present invention relates to a paper diaper that is designed to optimize the shrinkage force in each part of the diaper-shaped sheet generated by the elastic yarn.
[0002]
[Prior art]
As this type of paper diaper, a pant-type paper diaper that has been previously molded into a pants shape and is commercially available has been proposed and used. For example, as shown in FIGS. 6 to 8, a pants-type paper diaper described in Japanese Utility Model No. 3024357 is fixed to a diaper-shaped sheet 101 formed as a laminated sheet such as a nonwoven fabric and the inner surface of the diaper-shaped sheet 101. The absorbent body 110 extends back and forth around the crotch portion.
[0003]
The absorbent body 110 includes an absorbent material 112 between a liquid-permeable top sheet 111 formed of a nonwoven fabric or the like and a liquid-impervious back sheet 113 formed of a plastic film or a nonwoven fabric subjected to water repellent treatment. It is sandwiched and these peripheral edges are fixed.
[0004]
In addition, between the plurality of nonwoven fabrics of the diaper-shaped sheet 101, the left body part 102L of the front body, the left leg part 103L of the front part, the crotch part 104, and the right leg part 103R of the front part are passed through the front body. A plurality of elastic yarns G7... Are fixed so as to continue to the right waist side portion 102R and the left waist side portion 105L of the back body to the left leg surrounding portion 106L of the back body, the crotch portion 104, and the right side of the back body A plurality of elastic yarns G8 are fixed so as to continue to the right waist side portion 105R of the back body through the leg periphery portion 106R, and the leg periphery gathers 107 and 107 are respectively attached to the right leg periphery portion and the left leg periphery portion. It is formed.
[0005]
[Problems to be solved by the invention]
However, such conventional paper diapers have the following problems (a) and (b) because the contraction force in each part of the diaper-shaped sheet caused by the plurality of elastic yarns forming the gathers around the legs is not appropriate. It was.
(A) Since the contraction force of a plurality of elastic yarns extending in the crotch width direction is strongly applied to the absorbent body in the crotch part, the absorbent body contracts in the width direction, giving unpleasant feeling to the wearer was there.
(B) In addition, the contraction force by the plurality of elastic yarns extending in the waist circumference direction at the waist side was strong, and it was easy for a trace of tightening to be attached to the waist side of the wearer.
[0006]
Therefore, the main problem of the present invention is to optimize the contraction force of each part of the diaper-shaped sheet generated by a plurality of elastic yarns forming the leg gathers, thereby solving the problems (a) and (b) above. There is.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present inventors have actually measured the shrinkage force of a diaper-shaped sheet to which a plurality of elastic yarns are fixed using various elastic yarn arrangements. It was found that the ones with a narrower mutual spacing of the elastic yarns had a smaller contraction force than the ones made wider. Note that this phenomenon is considered to occur because the elastic movement of each elastic thread regulates the elastic movement of the other elastic threads when a plurality of elastic threads are fixed to the sheet in close proximity.
[0008]
The paper diaper of the present invention made based on such knowledge is formed by laminating and fixing a plurality of nonwoven fabrics, and between them, from the left waist side part of the front body to the left leg circumference part of the front body, the crotch part, the front body A plurality of elastic yarns are fixed so as to continue to the right waist side part of the front body through the right leg periphery part of the left leg side part of the back body from the left waist side part of the back body, the crotch part, A plurality of elastic yarns were fixed so as to continue to the right waist side of the back body through the right leg circumference of the back body, and gathers were formed around the right leg and the left leg around. A diaper sheet,
A liquid-impermeable back sheet, an absorbent material and a liquid-permeable top sheet are laminated in this order, and is composed of an absorbent body fixed to at least the crotch portion of the inner surface of the diaper-shaped sheet,
In pants-type paper diapers that are pre-shaped into pants,
The plurality of elastic yarns are fixed to the diaper-shaped sheet in a bundled state at the crotch portion, the left waist side portion, and the right waist side portion, and spaced apart from each other at the left leg surrounding portion and the right leg surrounding portion. Is opened and fixed to the diaper-shaped sheet ,
The plurality of elastic yarn fixing portions in the crotch portion, the left waist side portion, and the right waist side portion have a contraction force in the continuous direction of the elastic yarn from the fixing portions of the plurality of elastic yarns in the leg periphery portion. Is also weak,
It is characterized by this.
[0009]
In the present invention, a plurality of elastic yarns are fixed to the diaper-shaped sheet in a state where they are bundled at the crotch portion, and in a paper diaper where the contraction force in the crotch portion is weaker than that of the leg periphery portion, it is fixed to the crotch portion of the diaper-shaped sheet. The shrinkage of the absorbent body in the width direction is suppressed. In addition, since the leg circumference part touches the thigh of the wearer with a wider surface in the width direction, the fit to the front and rear of the base of the thigh is good, tightening marks are difficult to be attached, and the side leakage prevention effect is also excellent. .
[0010]
[0011]
Furthermore, it is more preferable that the plurality of elastic yarns at least in the crotch portion are fixed to the diaper sheet in a bundled state (see an experimental example described later). A plurality of elastic yarns are fixed to the diaper-shaped sheet in a bundled state at the waist side, and if the contraction force at the waist side is weaker than that around the legs, it will be tightened on the waist side of the wearer It becomes difficult to stick.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a developed state of a pant type paper diaper example P according to the present invention, FIG. 2 shows a front side of the pant type paper diaper P, and FIG. 3 shows a side view thereof. That is, the paper diaper P of this example includes a diaper sheet 1 and an absorbent body 10 that is fixed to the inner surface of the diaper sheet 1 and extends in the front-rear direction with the crotch portion 4 as the center.
[0013]
The diaper-shaped sheet 1 is formed by laminating and fixing a plurality of non-woven fabrics, and between them, the left waist side part 2L of the front body, the left leg circumference part 3L, the crotch part 4, and the right leg circumference part of the front body A plurality of elastic yarns G1,... Are fixed so as to continue through 3R to the right waist side 2R of the front body, and from the left waist side 5L of the back body to the left leg surrounding portion 6L of the back body and the crotch 4 A plurality of elastic yarns G2 are fixed so as to continue to the right waist side portion 5R of the back body through the right leg periphery portion 6R of the back body. As shown in FIGS. 2 and 3, the plurality of elastic yarns G1,... G2,. Note that C indicates a central region around each leg.
[0014]
The absorbent body 10 is the same as the conventional one, and although not shown in the drawings, the absorbent body 10 is made of a non-woven fabric or the like, and is made of a liquid-permeable top sheet 11 that directly touches the wearer's skin, a plastic film such as polyethylene, Between the liquid-impervious back sheet 13 to be formed, an absorbent material 12 mainly composed of cotton-like pulp and wrapped with absorbent paper as necessary is sandwiched, and the peripheral portion is formed by bonding with a hot melt adhesive or the like, for example. Can do.
[0015]
In particular, in the disposable diaper 1 of this example, the plurality of elastic yarns G1 on the front body side are bundled in the left waist side 2L, the crotch part 4 and the right waist side 2R of the front body. The other part, that is, the left leg surrounding part 3L of the front body and the right leg surrounding part 3R of the front body are fixed to the diaper sheet 1 with a space therebetween. Further, the plurality of elastic yarns G2 on the back body side are bound to the diaper-shaped sheet 1 in a bundled state in each of the left waist side part 5L, the crotch part 4 and the back waist part 5R of the back body. The other part, that is, the left leg surrounding part 6L of the back body and the right leg surrounding part 6R of the back body are fixed to the diaper sheet 1 with a space therebetween. In the illustrated example, both the plurality of elastic yarns G1 fixed to the front body side and the plurality of elastic yarns G2 fixed to the back body side are bundled together in the crotch portion 4.
[0016]
Therefore, in the disposable diaper 1 of this example, the arrangement | positioning space | interval of each elastic yarn G1 ..., G2 ... is the widest in leg surrounding part 3L, 3R, 6L, 6R, and crotch part 4 and waist part 2L, 2R, Narrowest at 5L and 5R.
[0017]
In addition, the contraction force of the portions where the plurality of elastic yarns G1,..., G2 are bundled and fixed, that is, the crotch portion 4 and the waist side portions 2L, 2R, 5L, 5R is weak. As a result, shrinkage in the width direction of the absorbent body 10 is reduced, and tightening marks are less likely to be attached to the waist of the wearer. In this example, in the leg surrounding portions 3L, 3R, 6L, 6R, the plurality of elastic yarns G1,..., G2. Stronger than part 4 and waistside parts 2L, 2R, 5L, 5R. Further, the leg surrounding portions 3L, 3R, 6L, 6R are in contact with the thighs of the wearer with a wider surface in the width direction. Therefore, the fitting property with respect to the base of the thigh is good, the tightening trace is difficult to be attached, and the side leakage preventing effect is also excellent.
[0018]
On the other hand, as the elastic yarn of the present invention, natural rubber yarn or synthetic rubber yarn having an appropriate thickness and cross-sectional shape can be used. If the number of elastic yarns is also plural, it is not necessary to be three as in the illustrated example.
[0019]
In the above example, both the plurality of elastic yarns G1 fixed to the front body side and the plurality of elastic yarns G2 fixed to the back body side are bundled together in the crotch portion 4, but this The invention is not limited to this. That is, a plurality of elastic yarns fixed to the front body side and a plurality of elastic yarns fixed to the back body side can be separately bundled at the crotch portion. In this case, as shown in FIG. 4, a plurality of elastic yarns G3 on the front body side and a plurality of elastic yarns G4 on the back body side are separately bundled in the crotch portion 4, and each of the plurality of elastic yarns is bundled. In the crotch portion 4, the yarns G3, G4,... Are crossed with each other, or a plurality of elastic yarns G5,. Each of the plurality of elastic yarns G5, G6,..., G6,.
[0020]
Further, in the above example, a plurality of elastic yarns in the crotch part and the waist side part are fixed to the diaper-shaped sheet in a bundled state, and the plurality of elastic yarns in the leg-around part are fixed to the diaper-shaped sheet at intervals. Yes.
[0021]
[0022]
<Experimental example>
Experimental examples are shown below.
First, a sheet piece 200 (invention example) in which six elastic yarns 200G are bundled and fixed as shown in FIG. 9A, and a plurality of elastic yarns 201G as shown in FIG. And a sheet piece 201 (Comparative Example) fixed with a gap therebetween. Both of these sheet pieces were prepared by sandwiching a plurality of elastic yarns between non-woven fabrics having a basis weight of 20 to 23 g / m ² and fixing them with double-sided tape, and the gather elongation rate was 200%. Is 100 mm × 50 mm.
[0023]
Next, the shrinkage force of these sheet pieces 200 and 201 was measured. Specifically, the sheet piece was attached to a tensile tester and reciprocated once in the longitudinal direction. At that time, the load required for elongation at each elongation rate was measured, and this was used as the contraction force. The results are shown in Table 1.
[0024]
[Table 1]

[0025]
As is clear from Table 1, the sheet piece 200 in which a plurality of elastic yarns according to the present invention are bundled and fixed is fixed with a plurality of comparative elastic yarns at intervals of 3 to 5 mm at all elongation ratios. The shrinkage force was weaker than that of the sheet piece 201 made. In addition, if the interval between the plurality of elastic yarns is 2 mm or less, it is also an experiment that the contraction force becomes weaker as compared with the comparative example in which the plurality of elastic yarns are fixed at intervals of 3 to 5 mm as in the present invention example. I confirmed.
[0026]
【The invention's effect】
As described above, according to the present invention, the contraction force of each part of the diaper sheet generated by the plurality of elastic yarns forming the leg gathers is appropriate. Specifically, the following effects (a) to (c) are exhibited.
(A) Since the contraction force in the width direction of the crotch portion is weakened, the absorber is less likely to contract in the width direction. Therefore, the discomfort given to the wearer can be reduced.
(B) The contraction force of the waist side by the elastic yarn is weakened to such an extent that a tightening mark is not easily attached to the waist of the wearer.
(C) Since the spacing between the multiple elastic yarns at the leg circumference of each body is wider than the crotch part, it exerts a sufficiently strong tightening force against the thigh of the wearer, and at the thigh of the wearer It is hard to get a tightening mark.
[Brief description of the drawings]
FIG. 1 is a development view of a pants-type paper diaper according to the present invention.
FIG. 2 is a front view of a pants-type paper diaper according to the present invention.
FIG. 3 is a side view thereof.
FIG. 4 is a development view of a pants-type paper diaper according to another embodiment of the present invention.
FIG. 5 is a development view of a pants-type paper diaper according to another embodiment of the present invention.
FIG. 6 is a development view of a conventional pants-type paper diaper.
FIG. 7 is a front view of a conventional pants-type paper diaper.
FIG. 8 is a side view thereof.
FIG. 9 is a plan view of a sheet piece used in an experimental example.
[Explanation of symbols]
P ... Pant type paper diaper, 1 ... Diaper shaped sheet, 2L, 2R ... Waist side of the front body, 3L, 3R ... Leg circumference part of the front body, 4 ... Crotch part, 5L, 5R ... Waist side of the back body, 6L, 6R ... Leg circumference of the back body, 7 ... Gather, 10 ... Absorber, 11 ... Liquid-permeable top sheet, 12 ... Absorbent material, 13 ... Liquid-impervious backsheet, G1 ... Elastic thread on the front body side , G2: elastic yarn on the back body side.

Claims (1)

A plurality of non-woven fabrics are laminated and fixed, and between them, the left waist side of the front body, the left leg part of the front body, the crotch part, the right leg part of the front body, the right waist side of the front body A plurality of elastic yarns are fixed so as to continue to the upper part, and from the left waist side part of the rear body to the left leg part of the rear part, the crotch part, the right leg part of the rear part, and the right part of the rear part A diaper-shaped sheet in which a plurality of elastic yarns are fixed so as to continue to the waist side, and gathers are formed around the right leg and the left leg, respectively.
A liquid-impermeable back sheet, an absorbent material and a liquid-permeable top sheet are laminated in this order, and is composed of an absorbent body fixed to at least the crotch portion of the inner surface of the diaper-shaped sheet,
In pants-type paper diapers that are pre-shaped into pants,
The plurality of elastic yarns are fixed to the diaper-shaped sheet in a bundled state at the crotch portion, the left waist side portion, and the right waist side portion, and spaced apart from each other at the left leg surrounding portion and the right leg surrounding portion. Is opened and fixed to the diaper-shaped sheet ,
The plurality of elastic yarn fixing portions in the crotch portion, the left waist side portion, and the right waist side portion have a contraction force in the continuous direction of the elastic yarn from the fixing portions of the plurality of elastic yarns in the leg periphery portion. Is also weak,
Paper diapers characterized by that.

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