JP2021023677A - Absorbent article - Google Patents
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- JP2021023677A JP2021023677A JP2019145750A JP2019145750A JP2021023677A JP 2021023677 A JP2021023677 A JP 2021023677A JP 2019145750 A JP2019145750 A JP 2019145750A JP 2019145750 A JP2019145750 A JP 2019145750A JP 2021023677 A JP2021023677 A JP 2021023677A
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- woven fabric
- absorbent article
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- propylene
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- 239000002250 absorbent Substances 0.000 title claims abstract description 46
- 230000002745 absorbent Effects 0.000 title claims abstract description 42
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 claims abstract description 29
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 29
- 239000012510 hollow fiber Substances 0.000 claims abstract description 27
- 229920000642 polymer Polymers 0.000 claims abstract description 25
- 238000012669 compression test Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004711 α-olefin Substances 0.000 claims description 9
- 238000002788 crimping Methods 0.000 claims description 7
- 229920005604 random copolymer Polymers 0.000 claims description 7
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920001384 propylene homopolymer Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 16
- 238000001816 cooling Methods 0.000 description 12
- 238000004049 embossing Methods 0.000 description 10
- 210000002700 urine Anatomy 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000009987 spinning Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229920000247 superabsorbent polymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SGHZXLIDFTYFHQ-UHFFFAOYSA-L Brilliant Blue Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 SGHZXLIDFTYFHQ-UHFFFAOYSA-L 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 108010020346 Polyglutamic Acid Proteins 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229920000370 gamma-poly(glutamate) polymer Polymers 0.000 description 1
- 150000004688 heptahydrates Chemical class 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 239000012968 metallocene catalyst Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 108010064470 polyaspartate Proteins 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical compound CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
Description
本開示は、吸収用物品に関する。 The present disclosure relates to absorbent articles.
近年、ポリプロピレン不織布に代表される熱可塑性樹脂繊維からなる不織布は通気性、柔軟性、軽量性等に優れることから各種用途に幅広く用いられている。そのため、不織布には、その用途に応じた各種の特性が求められるとともに、その特性の向上が要求されている。
中でもおむつは、熱可塑性樹脂繊維からなる不織布が適用され、近年、新興国の人口増加に伴い使用量が増大し、巨大な市場が見込まれている。一方で、使い捨てである紙おむつの使用量増大に伴うＣＯ２排出量の増加が深刻な環境問題となりつつある。
In recent years, non-woven fabrics made of thermoplastic resin fibers typified by polypropylene non-woven fabrics are widely used in various applications because they are excellent in breathability, flexibility, light weight and the like. Therefore, the non-woven fabric is required to have various properties according to its use, and to improve the properties.
Among them, non-woven fabrics made of thermoplastic resin fibers are applied to diapers, and in recent years, the amount used has increased with the increase in the population of emerging countries, and a huge market is expected. On the other hand, the increase in CO 2 emissions accompanying the increase in the amount of disposable disposable diapers used is becoming a serious environmental problem.
ここで、使用量を削減するにあたり原料を削減して軽量化した不織布を使用することが挙げられる。そして、不織布を大きく軽量化する方法の一つとして、不織布を形成する繊維を中空繊維とする方法が種々提案されている。例えば、特許文献１には、繊維径が２０μｍ以下で中空率が５〜７０％の衛生材料に好適なポリプロピレン不織布が提案されており、特許文献１の表１には、繊維径が２２．２μｍ、中空率が１３％で、目付が２２．２ｇ／ｍ２の不織布が記載されている。 Here, in order to reduce the amount used, it is possible to use a non-woven fabric that is lighter in weight by reducing the amount of raw materials. As one of the methods for greatly reducing the weight of the non-woven fabric, various methods have been proposed in which the fibers forming the non-woven fabric are hollow fibers. For example, Patent Document 1 proposes a polypropylene non-woven fabric suitable for sanitary materials having a fiber diameter of 20 μm or less and a hollow ratio of 5 to 70%, and Table 1 of Patent Document 1 shows a fiber diameter of 22.2 μm. , A non-woven fabric having a hollow ratio of 13% and a grain size of 22.2 g / m 2 is described.
また、特許文献２には、プロピレン系重合体として、Ｚ平均分子量（Ｍｚ）と重量平均分子量（Ｍｗ）との比（Ｍｚ／Ｍｗ）が１．５〜１．９の範囲にあるプロピレン系重合体の中空繊維からなる長繊維不織布が提案されており、実施例１には、繊維径が２１．５μｍ、中空率が２８．５％で、目付が３０ｇ／ｍ２のスパンボンド不織布が記載されている。 Further, in Patent Document 2, as a propylene-based polymer, a propylene-based weight in which the ratio (Mz / Mw) of the Z average molecular weight (Mz) to the weight average molecular weight (Mw) is in the range of 1.5 to 1.9. A long-fiber non-woven fabric made of coalesced hollow fibers has been proposed. In Example 1, a spunbonded non-woven fabric having a fiber diameter of 21.5 μm, a hollow ratio of 28.5%, and a molecular weight of 30 g / m 2 is described. ing.
おむつに代表される吸収用物品では、既述のように中空繊維である熱可塑性樹脂繊維からなる不織布が用いられることがある。そのような吸収用物品では、一旦熱可塑性樹脂繊維からなる不織布を通過、又は不織布に吸収された液体は、液戻り量が少ないこと、すなわち耐リウェット性が高いことが要求される。
本発明の一実施形態の課題は、スパンボンド不織布を含む吸収用物品において、耐リウェット性に優れた吸収用物品を提供することである。
As described above, a non-woven fabric made of a thermoplastic resin fiber, which is a hollow fiber, may be used in an absorbent article typified by a diaper. In such an absorbing article, the liquid once passed through the non-woven fabric made of the thermoplastic resin fiber or absorbed by the non-woven fabric is required to have a small amount of liquid return, that is, high rewet resistance.
An object of an embodiment of the present invention is to provide an absorbent article having excellent rewet resistance in an absorbent article containing a spunbonded nonwoven fabric.
上記課題を解決するための手段には、以下の実施態様が含まれる。
＜１＞
プロピレン系重合体の中空繊維からなり、
ＪＩＳ−Ｌ１０９６：２０１０に準拠して測定された剛軟度［ｍｍ］の平均値（Ｘ）、 及び、ＫＥＳ法による圧縮試験で測定した圧力０．５ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＯ、ＫＥＳ法による圧縮試験で測定した圧力５０ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＭとしたときのＴＯ−ＴＭ（Ｙ）が下記条件（Ａ）〜（Ｃ）を満たすスパンボンド不織布を含む吸収用物品。
（Ａ）：２０≦Ｘ≦４５
（Ｂ）：０．１００≦Ｙ≦０．１２７
（Ｃ）：Ｙ≦０．０００８Ｘ＋０．０９１
＜２＞
前記スパンボンド不織布の目付が５ｇ／ｍ２〜３０ｇ／ｍ２である＜１＞に記載の吸収用物品。
＜３＞
前記スパンボンド不織布は圧着部と非圧着部とを有する＜１＞又は＜２＞に記載の吸収用物品。
＜４＞
前記圧着部の面積率が５％〜２０％である＜３＞に記載の吸収用物品。
＜５＞
前記プロピレン系重合体が、プロピレン単独重合体、及びプロピレン・α−オレフィンランダム共重合体から選択される少なくとも１つである＜１＞〜＜４＞のいずれか一項に記載の吸収用物品。
＜６＞
前記スパンボンド不織布が積層されてなる不織布積層体を備える＜１＞〜＜５＞のいずれか一項に記載の吸収用物品。
＜７＞
吸水性ポリマーを含む吸収体層と、
前記吸収体層の少なくとも一方の面に設けられる、前記スパンボンド不織布を含む透液層と、
を含む＜１＞〜＜６＞のいずれか一項に記載の吸収用物品。
＜８＞
前記透液層がトップシートである＜７＞に記載の吸収用物品。
Means for solving the above problems include the following embodiments.
<1>
Consists of hollow fibers of propylene polymer
The average value (X) of rigidity [mm] measured in accordance with JIS-L1096: 2010 and the thickness [mm] at a pressure of 0.5 gf / cm 2 measured by the compression test by the KES method are TO. Absorbent article containing spunbonded non-woven fabric in which TO-TM (Y) satisfies the following conditions (A) to (C) when the thickness [mm] at a pressure of 50 gf / cm 2 measured by the compression test by the KES method is TM. ..
(A): 20 ≦ X ≦ 45
(B): 0.100 ≤ Y ≤ 0.127
(C): Y ≦ 0.0008X + 0.091
<2>
Absorbent article according to the basis weight of the spunbonded nonwoven fabric is 5g / m 2 ~30g / m 2 <1>.
<3>
The absorbent article according to <1> or <2>, wherein the spunbonded non-woven fabric has a crimping portion and a non-crimping portion.
<4>
The absorbent article according to <3>, wherein the area ratio of the crimping portion is 5% to 20%.
<5>
The absorption article according to any one of <1> to <4>, wherein the propylene-based polymer is at least one selected from a propylene homopolymer and a propylene / α-olefin random copolymer.
<6>
The absorbent article according to any one of <1> to <5>, comprising a non-woven fabric laminate in which the spunbonded non-woven fabric is laminated.
<7>
Absorbent layer containing water-absorbent polymer and
A liquid permeable layer containing the spunbonded non-woven fabric provided on at least one surface of the absorber layer, and
The absorbent article according to any one of <1> to <6>, which comprises.
<8>
The absorbent article according to <7>, wherein the liquid permeable layer is a top sheet.
本発明の一実施形態によれば、スパンボンド不織布を含む吸収用物品において、耐リウェット性に優れた吸収用物品が提供される。 According to one embodiment of the present invention, an absorbent article having excellent rewet resistance is provided as an absorbent article containing a spunbonded nonwoven fabric.
以下、本発明の実施形態（以下、「本実施形態」ともいう）について説明する。
但し、本発明は以下の実施形態に限定されるものではない。以下の実施形態において、その構成要素（要素ステップ等も含む）は、特に明示した場合、原理的に明らかに必須であると考えられる場合等を除き、必須ではない。数値及びその範囲についても同様であり、本発明を制限するものではない。
Hereinafter, embodiments of the present invention (hereinafter, also referred to as “the present embodiment”) will be described.
However, the present invention is not limited to the following embodiments. In the following embodiments, the components (including element steps and the like) are not essential unless otherwise specified, unless it is clearly considered to be essential in principle. The same applies to the numerical values and their ranges, and does not limit the present invention.
本開示中に段階的に記載されている数値範囲において、一つの数値範囲で記載された上限値又は下限値は、他の段階的な記載の数値範囲の上限値又は下限値に置き換えてもよい。また、本開示中に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値に置き換えてもよい。 In the numerical range described stepwise in the present disclosure, the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of another numerical range described stepwise. .. Further, in the numerical range described in the present disclosure, the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.
＜吸収用物品＞
本実施形態に係る吸収用物品は、プロピレン系重合体の中空繊維からなり、ＪＩＳ−Ｌ１０９６：２０１０に準拠して測定された剛軟度[ｍｍ]の平均値（Ｘ）、及びＫＥＳ法による圧縮試験で測定した圧力０．５ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＯ、ＫＥＳ法による圧縮試験で測定した圧力５０ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＭとしたときのＴＯ−ＴＭ（Ｙ）が下記条件（Ａ）〜（Ｃ）を満たすスパンボンド不織布を含む吸収用物品である。
（Ａ）：２０≦Ｘ≦４５
（Ｂ）：０．１００≦Ｙ≦０．１２７
（Ｃ）：Ｙ≦０．０００８Ｘ＋０．０９１
<Article for absorption>
The absorbent article according to the present embodiment is made of hollow fibers of a propylene-based polymer, and has an average value (X) of rigidity [mm] measured in accordance with JIS-L1096: 2010, and compression by the KES method. thickness at a pressure 0.5 gf / cm 2 as measured by test [mm] tO, tO-TM when the thickness [mm] at a pressure 50 gf / cm 2 as measured by compression test according to KES method was TM (Y) is An absorbent article containing a spunbonded non-woven fabric that satisfies the following conditions (A) to (C).
(A): 20 ≦ X ≦ 45
(B): 0.100 ≤ Y ≤ 0.127
(C): Y ≦ 0.0008X + 0.091
本実施形態に係る吸収用物品は、上記構成とすることで耐リウェット性に優れた吸収用物品が得られる。なお、本実施形態に係る吸収用物品とは、液体を吸収する目的で好適に使用される物品のことを示す。 The absorbent article according to the present embodiment has the above configuration, so that an absorbent article having excellent rewet resistance can be obtained. The absorption article according to the present embodiment means an article preferably used for the purpose of absorbing a liquid.
本実施形態に用いられるプロピレン系重合体の中空繊維からなるスパンボンド不織布について、ＴＯ−ＴＭの値とスパンボンド不織布の剛軟度（以下、「カンチレバー」ともいう）の値の両者の関係を検討した結果、上記条件（Ａ）〜（Ｃ）の条件を満たす領域において、耐リウェット性に優れる吸収用物品が得られることを本発明者らは見出した。 Regarding the spunbonded nonwoven fabric made of hollow fibers of the propylene polymer used in this embodiment, the relationship between the TO-TM value and the rigidity (hereinafter, also referred to as “cantilever”) value of the spunbonded nonwoven fabric was examined. As a result, the present inventors have found that an absorbent article having excellent rewet resistance can be obtained in a region satisfying the above conditions (A) to (C).
［スパンボンド不織布］
本実施形態の吸収用物品に含まれるスパンボンド不織布は、既述の条件（Ａ）〜（Ｃ）を満たす。本実施形態において、剛軟度[ｍｍ]の平均値（Ｘ）は、耐リウェット性及び柔軟性が良好な吸収用物品を得る観点から、２０以上４０以下であること（すなわち、（Ａ２）：２０≦Ｘ≦４０を満たすこと。）が好ましく、２５以上３５以下であること、（すなわち、（Ａ３）：２５≦Ｘ≦３５を満たすこと。）がより好ましい。
なお、剛軟度[ｍｍ]の平均値（Ｘ）は、後述の実施例で示される方法により測定され、算出される。
[Spanbond non-woven fabric]
The spunbonded non-woven fabric contained in the absorbent article of the present embodiment satisfies the above-mentioned conditions (A) to (C). In the present embodiment, the average value (X) of the rigidity [mm] is 20 or more and 40 or less (that is, (A2): from the viewpoint of obtaining an absorbent article having good rewet resistance and flexibility. 20 ≦ X ≦ 40) is preferable, and 25 or more and 35 or less (that is, (A3): 25 ≦ X ≦ 35 is satisfied) is more preferable.
The average value (X) of the rigidity [mm] is measured and calculated by the method shown in Examples described later.
カンチレバーの平均（Ｘ）の値は、原料、目付、エンボス面積率等が関係しており、例えばスパンボンド不織布の目付が増加すると、増加する傾向にあり、使用する原料がポリプロピレン単独重合体よりもプロピレン・α−オレフィンランダム共重合体の方が減少する傾向にある。スパンボンド不織布に使用する原料、目付、及びエンボス面積率等を調整することにより、カンチレバーの平均（Ｘ）の値を調整することができる。 The average (X) value of the cantilever is related to the raw material, the texture, the embossed area ratio, etc. For example, when the texture of the spunbonded non-woven fabric increases, it tends to increase, and the raw material used is higher than that of the polypropylene copolymer. The amount of propylene / α-olefin random copolymer tends to decrease. The average (X) value of the cantilever can be adjusted by adjusting the raw material, basis weight, embossed area ratio, etc. used for the spunbonded non-woven fabric.
圧力０．５ｇｆ／ｃｍ２における厚みＴＯは、ＫＥＳ法による圧縮試験における圧力０．５ｇｆ／ｃｍ２での厚みであり、初期厚みを表す。ＴＯは、耐リウェット性向上の観点から０．１０ｍｍ以上であることが好ましく、０．１５ｍｍ以上であることがより好ましく、また、柔軟性が良好で、かつコストを削減する観点から０．３５ｍｍ以下であることが好ましく、０．２８ｍｍ以下であることがより好ましい。
圧力５０ｇｆ／ｃｍ２における厚みＴＭは、ＫＥＳ法による圧縮試験における圧力５０ｇｆ／ｃｍ２での厚みであり、最大圧縮時の厚みを表す。
ＴＯ−ＴＭ（Ｙ）は、上記ＴＯと上記ＴＭとの差である。ＴＯ−ＴＭ［ｍｍ］が小さいほど、スパンボンド不織布が圧縮されにくいことを示す。
本実施形態において、Ｙ［ｍｍ］は、耐リウェット性に優れ、かつ軽量化の観点から、０．１００以上０．１２３以下であること（すなわち、（Ｂ２）：０．１００≦Ｙ≦０．１２３を満たすこと。）が好ましく、０．１００以上０．１２０以下であること（すなわち、（Ｂ３）：０．１００≦Ｙ≦０．１２０を満たすこと。）がより好ましい。
Thickness TO at a pressure 0.5 gf / cm 2 is the thickness at a pressure 0.5 gf / cm 2 in a compression test according to KES method, it represents the initial thickness. The TO is preferably 0.10 mm or more, more preferably 0.15 mm or more, from the viewpoint of improving rewet resistance, and 0.35 mm or less from the viewpoint of good flexibility and cost reduction. It is preferably 0.28 mm or less, and more preferably 0.28 mm or less.
The thickness TM of the pressure 50 gf / cm 2 is the thickness at a pressure 50 gf / cm 2 in a compression test according to KES method, represents the thickness at the time of maximum compression.
TO-TM (Y) is the difference between the TO and the TM. The smaller the TO-TM [mm], the more difficult it is for the spunbonded non-woven fabric to be compressed.
In the present embodiment, Y [mm] is 0.100 or more and 0.123 or less from the viewpoint of excellent rewet resistance and weight reduction (that is, (B2): 0.100 ≦ Y ≦ 0. It is preferable that 123 is satisfied), and it is more preferable that it is 0.100 or more and 0.120 or less (that is, (B3): 0.100 ≦ Y ≦ 0.120 is satisfied).
前記ＴＯ、及び前記ＴＭの値はそれぞれ、スパンボンド不織布に使用される原料、目付、エンボス面積率等を調整することにより調整される。ＴＯ、及びＴＭの値をそれぞれ調整することにより、ＴＯ−ＴＭ（Ｙ）を目的とする値とすることが可能である。 The values of TO and TM are adjusted by adjusting the raw material, basis weight, embossed area ratio, etc. used for the spunbonded non-woven fabric, respectively. By adjusting the values of TO and TM respectively, it is possible to set the target value of TO-TM (Y).
本実施形態に用いられるスパンボンド不織布の目付は、５ｇ／ｍ２〜３０ｇ／ｍ２であることが好ましい。本実施形態において、目付は、柔軟性の観点から、２７ｇ／ｍ２以下であることがより好ましく、２３ｇ／ｍ２以下であることが更に好ましく、２０ｇ／ｍ２以下であることが特に好ましい。また、目付は、耐リウェット性向上の観点から、１３ｇ／ｍ２以上であることがより好ましく、１５ｇ／ｍ２以上であることが更に好ましい。 Basis weight of the spunbonded nonwoven fabric used in this embodiment is preferably 5g / m 2 ~30g / m 2 . In this embodiment, the basis weight, from the viewpoint of flexibility, more preferably 27 g / m 2 or less, and particularly preferably further preferably 23 g / m 2 or less, 20 g / m 2 or less. Also, the basis weight, from the viewpoint of resistance to rewet improvement, more preferably 13 g / m 2 or more, more preferably 15 g / m 2 or more.
本実施形態に用いられるスパンボンド不織布は、圧着部と非圧着部とを有していてもよい。圧着部の面積率は、５％〜２０％であることが好ましい。圧着部のより好ましい面積率は、８％〜１９％である。圧着部の面積率は、スパンボンド不織布から１０ｍｍ×１０ｍｍの大きさの試験片を採取し、試験片のエンボスロールとの接触面を、電子顕微鏡（倍率：１００倍）で観察し、観察した不織布の面積に対し、熱圧着された部分の面積の割合とする。また、圧着部を形成し得るエンボスロールに形成された凸部の面積率を「エンボス面積率」ともいう。 The spunbonded non-woven fabric used in the present embodiment may have a crimped portion and a non-crimped portion. The area ratio of the crimped portion is preferably 5% to 20%. A more preferable area ratio of the pressure-bonded portion is 8% to 19%. For the area ratio of the pressure-bonded portion, a test piece having a size of 10 mm × 10 mm was collected from the spunbonded non-woven fabric, and the contact surface of the test piece with the embossed roll was observed with an electron microscope (magnification: 100 times). The ratio of the area of the thermocompression-bonded portion to the area of. Further, the area ratio of the convex portion formed on the embossed roll capable of forming the crimping portion is also referred to as "embossed area ratio".
本実施形態に用いられるスパンボンド不織布は、前述の条件（Ａ）〜（Ｃ）を満足するのであれば、目的とする用途に応じて、スパンボンド不織布積層体（単に「不織布積層体」ともいう。）としてもよい。つまり、本実施形態に用いられる不織布積層体は、前述の条件（Ａ）〜（Ｃ）を満足する。具体的には、スパンボンド不織布の積層構造体は、同じスパンボンド不織布を積層したスパンボンド不織布積層体であってもよく、異なるスパンボンド不織布を積層したスパンボンド不織布積層体であってもよい。また、不織布積層体における積層数として、例えば２層〜１０層であるものが挙げられ、特に限定されるものではない。スパンボンド不織布積層体における条件（Ａ）〜（Ｃ）の定義、好ましい定義、特性、例などの詳細は、前述のスパンボンド不織布における条件（Ａ）〜（Ｃ）の定義、好ましい定義、特性、例などの詳細と同様である。 The spunbonded non-woven fabric used in the present embodiment is also referred to as a spunbonded non-woven fabric laminate (also simply referred to as "nonwoven fabric laminate") depending on the intended use, provided that the above-mentioned conditions (A) to (C) are satisfied. .) May be used. That is, the non-woven fabric laminate used in the present embodiment satisfies the above-mentioned conditions (A) to (C). Specifically, the laminated structure of the spunbonded non-woven fabric may be a spunbonded nonwoven fabric laminate in which the same spunbonded nonwoven fabric is laminated, or may be a spunbonded nonwoven fabric laminate in which different spunbonded non-woven fabrics are laminated. Further, the number of laminated non-woven fabrics includes, for example, 2 to 10 layers, and is not particularly limited. Details of the definitions, preferred definitions, properties, examples, etc. of the conditions (A) to (C) in the spunbonded nonwoven fabric laminate are described in the above-mentioned definitions, preferred definitions, properties of the conditions (A) to (C) in the spunbonded nonwoven fabric. Similar to details such as examples.
また、本実施形態に用いられるスパンボンド不織布、又は本実施形態に用いられるスパンボンド不織布積層体は、目的に応じて、例えば、編布、織布、スパンボンド不織布以外の不織布、フィルム（シートを含む）等の材料と貼り合わせてもよい。 Further, the spunbonded non-woven fabric used in the present embodiment or the spunbonded non-woven fabric laminate used in the present embodiment may be, for example, a knitted fabric, a woven fabric, a non-woven fabric other than the spunbonded non-woven fabric, or a film (sheet). It may be bonded with a material such as (including).
（プロピレン系重合体）
本実施形態に用いられるスパンボンド不織布の中空繊維を構成するプロピレン系重合体は、プロピレンの単独重合体、及びプロピレンとエチレン、１−ブテン、１−ペンテン、１−ヘキセン、１−オクテン、４−メチル−１−ペンテン等の炭素数２以上、好ましくは２〜８の１種または２種以上のα−オレフィン（ただし、プロピレンは除く。）とのランダム共重合体（プロピレン・α−オレフィンランダム共重合体）から選択される少なくとも１つであり、通常、融点（Ｔｍ）が１２５℃以上、好ましくは１２５℃〜１６５℃の範囲にある。α−オレフィンの共重合量は、得られるプロピレン系重合体の融点（Ｔｍ）が上記範囲にある限り特に限定はされないが、通常、１０モル％以下、好ましくは６モル％以下である。
(Propylene polymer)
The propylene-based polymer constituting the hollow fiber of the spunbonded non-woven fabric used in the present embodiment is a homopolymer of propylene, and propylene and ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-. Random copolymer (both propylene and α-olefin random) with one or more α-olefins (excluding propylene) having 2 or more carbon atoms, preferably 2 to 8 carbon atoms such as methyl-1-pentene. It is at least one selected from the polymer), and usually has a melting point (Tm) of 125 ° C. or higher, preferably 125 ° C. to 165 ° C. The copolymerization amount of the α-olefin is not particularly limited as long as the melting point (Tm) of the obtained propylene-based polymer is within the above range, but is usually 10 mol% or less, preferably 6 mol% or less.
プロピン系重合体として、プロピレン・α−オレフィンランダム共重合体を用いる場合は、好ましくは融点（Ｔｍ）が１５３℃以下、より好ましくは１２５℃〜１５０℃の範囲にあるプロピレン・α−オレフィンランダム共重合体が好ましい。 When a propylene / α-olefin random copolymer is used as the propyne-based polymer, the propylene / α-olefin random copolymer having a melting point (Tm) of preferably 153 ° C. or lower, more preferably 125 ° C. to 150 ° C. is used. Polymers are preferred.
本実施形態に用いられるプロピレン系重合体は、スパンボンド不織布を製造し得る限り特に限定はされないが、通常、メルトフローレート（ＭＦＲ）（ＡＳＴＭ Ｄ−１２３８、２３０℃、荷重２１６０ｇ）が１０ｇ／１０分〜１００ｇ／１０分、好ましくは２０ｇ／１０分〜７０ｇ／１０分の範囲にある。ＭＦＲが１０ｇ／１０分以上のプロピレン系重合体を用いた場合は、溶融粘度が低く紡糸性が向上する傾向にあり、一方、１００ｇ／１０分以下であるプロピレン系重合体は、得られるスパンボンド不織布の引張強度等が向上する傾向がある。 The propylene-based polymer used in the present embodiment is not particularly limited as long as it can produce a spunbonded nonwoven fabric, but usually has a melt flow rate (MFR) (ASTM D-1238, 230 ° C., load 2160 g) of 10 g / 10. It is in the range of minutes to 100 g / 10 minutes, preferably 20 g / 10 minutes to 70 g / 10 minutes. When a propylene-based polymer having an MFR of 10 g / 10 minutes or more is used, the melt viscosity tends to be low and the spinnability tends to be improved, while the propylene-based polymer having an MFR of 100 g / 10 minutes or less tends to obtain a spunbond. The tensile strength of the non-woven fabric tends to improve.
プロピレン系重合体は、通常、所謂チタン含有固体状遷移金属成分と有機金属成分を組み合わせたチーグラー・ナッタ型触媒、あるいはシクロペンタジエニル骨格を少なくとも１個有する周期律表第４族〜第６族の遷移金属化合物及び助触媒成分からなるメタロセン触媒を用いて、スラリー重合、気相重合、バルク重合で、プロピレンを単独重合、あるいはプロピレンと少量のα−オレフィンとを共重合させることにより得られる。 Propylene-based polymers are usually Ziegler-Natta-type catalysts in which a so-called titanium-containing solid transition metal component and an organometallic component are combined, or Group 4 to Group 6 of the periodic table having at least one cyclopentadienyl skeleton. It is obtained by homopolymerizing propylene or copolymerizing propylene with a small amount of α-olefin by slurry polymerization, vapor phase polymerization, or bulk polymerization using a metallocene catalyst composed of the transition metal compound and the co-catalyst component.
本実施形態に用いられるプロピレン系重合体には、本発明の目的を損なわない範囲で、通常用いられる酸化防止剤、耐候安定剤、耐光安定剤、帯電防止剤、親水剤、防曇剤、ブロッキング防止剤、滑剤、核剤、顔料等の添加剤あるいは他の重合体を必要に応じて配合することができる。 The propylene-based polymer used in the present embodiment contains commonly used antioxidants, weather stabilizers, light-resistant stabilizers, antistatic agents, hydrophilic agents, antifogging agents, and blocking agents, as long as the object of the present invention is not impaired. Additives such as inhibitors, lubricants, nucleating agents, pigments or other polymers can be added as needed.
＜用途＞
本実施形態に用いられるスパンボンド不織布を含む吸収用物品、及びスパンボンド不織布積層体を備えてなる吸収用物品は、衛生材料分野、医療材料分野、包装材料分野などにおいて好適に用いられる。具体的には、おむつ、生理用品、尿取りパッド、ペット用シート等に適用され、例えば、トップシート、セカンドシート、コアラップ等の部材を構成するものとして用いられる。
<Use>
The absorbent article containing the spunbonded nonwoven fabric used in the present embodiment and the absorbent article provided with the spunbonded nonwoven fabric laminate are suitably used in the fields of sanitary materials, medical materials, packaging materials and the like. Specifically, it is applied to diapers, sanitary napkins, urine absorbing pads, pet sheets and the like, and is used, for example, as a member of a top sheet, a second sheet, a core wrap and the like.
本実施形態に係る吸収用物品の好ましい態様の一例として、吸水性ポリマーを含む吸収体層と、前記吸収体層の少なくとも一方の面に設けられる、前記スパンボンド不織布を含む透液層と、を備えるものが挙げられる。 As an example of a preferred embodiment of the absorbent article according to the present embodiment, an absorbent layer containing a water-absorbent polymer and a liquid-permeable layer containing the spunbonded non-woven fabric provided on at least one surface of the absorbent layer are provided. There are things to prepare.
（吸収体層）
吸収体層は、吸収した液体を保持するものであり、吸水性ポリマーを含む。例えば、吸収用物品がおむつである場合、吸収体層は着用者の尿等の排泄液を保持する。
吸水性ポリマーとしては、ポリアクリル酸塩系、ポリスルホン酸塩系、無水マレイン酸塩系、ポリアクリルアミド系、ポリビニルアルコール系、ポリエチレンオキシド系、ポリアスパラギン酸塩系、ポリグルタミン酸塩系、ポリアルギン酸塩系、デンプン系、セルロース系等の高吸水性樹脂（Ｓｕｐｅｒ Ａｂｓｏｒｂｅｎｔ Ｐｏｌｙｍｅｒ：ＳＡＰ）が例示される。これらのうち、ポリアクリル酸塩系（特に、ポリアクリル酸ナトリウム系）の高吸水性樹脂が好ましい。
(Absorbent layer)
The absorber layer holds the absorbed liquid and contains a water-absorbing polymer. For example, when the absorbent article is a diaper, the absorber layer holds the wearer's excrement such as urine.
Examples of the water-absorbing polymer include polyacrylate-based, polysulfonate-based, maleanic anhydride-based, polyacrylamide-based, polyvinyl alcohol-based, polyethylene oxide-based, polyaspartate-based, polyglutamate-based, and polyarginate-based. , Super Absorbent Polymer (SAP) such as starch-based and cellulose-based resins are exemplified. Of these, polyacrylate-based (particularly sodium polyacrylate-based) highly water-absorbent resins are preferable.
（透液層）
透液層は、吸収体層の少なくとも一方の面に設けられる。透液層は、吸収体層に液体等を吸収させるために、その少なくとも一部（全部ないし一部）が液透過性材料により構成されることが好ましい。液透過性材料として、本実施形態で用いられるスパンボンド不織布が適用される。透液層は単一のシート材によって構成されていてもよいし、複数のシート材によって構成されていてもよい。複数のシート材は、同じスパンボンド不織布を積層したものであってもよく、異なるスパンボンド不織布を積層したものであってもよい。
透液層の具体例として、上述のトップシート、セカンドシート、吸収体層を包むコアラップ等が挙げられる。
(Liquid permeable layer)
The liquid permeable layer is provided on at least one surface of the absorber layer. It is preferable that at least a part (all or a part) of the liquid permeable layer is made of a liquid permeable material in order to allow the absorbent layer to absorb the liquid or the like. As the liquid permeable material, the spunbonded non-woven fabric used in this embodiment is applied. The liquid permeable layer may be composed of a single sheet material or may be composed of a plurality of sheet materials. The plurality of sheet materials may be made by laminating the same spunbonded non-woven fabric, or may be made by laminating different spunbonded non-woven fabrics.
Specific examples of the liquid permeable layer include the above-mentioned top sheet, second sheet, core wrap that wraps the absorbent layer, and the like.
＜スパンボンド不織布の製造方法＞
本実施形態に用いられるスパンボンド不織布は、特開昭６０−１５５７６５号、特許３４４２８９６号、及び特許３８８３８１８号などに示される密閉型のスパンボンドプロセスにより製造し得る。
<Manufacturing method of spunbonded non-woven fabric>
The spunbonded non-woven fabric used in this embodiment can be produced by a sealed spunbonding process shown in JP-A-60-155765, Japanese Patent No. 3442896, Japanese Patent No. 388818, and the like.
本実施形態に用いられる中空繊維からなるスパンボンド不織布は、例えば図５に示すスパンボンド不織布製造装置により製造される。図５に示すスパンボンド不織布製造装置は、押出機１と、紡糸口金２と、ディフューザー５と、捕捉装置６と、吸引装置７とを備える。紡糸口金２から紡糸された中空繊維３は、密閉型の冷却室中の冷却風４により冷却される。中空繊維３が冷却された後、冷却室の下流側に冷却に用いた冷却風を延伸風に用いる為の隘路（延伸部）を通して、当該延伸風により長繊維を延伸（牽引）し、下流側に設置したディフューザー５にて繊維が分散され、移動捕集面上（メッシュベルト上）に堆積され、スパンボンド不織布８が得られる。また、紡糸口金２の具体的な形状として、例えば図１に示す孔形状を有するものが挙げられ、スパンボンド不織布製造装置は、図１に示す孔形状を有する多数の紡糸孔（ノズル）を備えた口金（ダイ）を有する。図１に示すノズル孔形状のものを使用した場合、図２に示す中空断面となるような中空繊維を形成し得る。 The spunbonded nonwoven fabric made of hollow fibers used in the present embodiment is manufactured by, for example, the spunbonded nonwoven fabric manufacturing apparatus shown in FIG. The spunbonded non-woven fabric manufacturing apparatus shown in FIG. 5 includes an extruder 1, a spinneret 2, a diffuser 5, a trapping device 6, and a suction device 7. The hollow fiber 3 spun from the spinneret 2 is cooled by the cooling air 4 in the closed cooling chamber. After the hollow fibers 3 are cooled, the long fibers are stretched (drawn) by the stretching air through a barrier (stretched portion) for using the cooling air used for cooling as the stretching wind on the downstream side of the cooling chamber, and the downstream side. The fibers are dispersed by the diffuser 5 installed in the above and deposited on the moving collection surface (on the mesh belt) to obtain the spunbonded nonwoven fabric 8. Further, as a specific shape of the spinneret 2, for example, one having the hole shape shown in FIG. 1 can be mentioned, and the spunbonded nonwoven fabric manufacturing apparatus includes a large number of spinning holes (nozzles) having the hole shape shown in FIG. It has a die. When the nozzle hole shape shown in FIG. 1 is used, hollow fibers having a hollow cross section shown in FIG. 2 can be formed.
また、紡糸口金２の他の具体的な形状として、図３に示すような孔形状を有するものが挙げられる。図３に示すノズル孔形状のものを使用した場合、図４に示す中空断面となるような中空繊維を形成し得る。 Further, as another specific shape of the spinneret 2, there is one having a hole shape as shown in FIG. When the nozzle hole shape shown in FIG. 3 is used, hollow fibers having a hollow cross section shown in FIG. 4 can be formed.
プロピレン系重合体の溶融温度は特に限定されないが、好ましくは１８０℃〜２８０℃、より好ましくは１９０℃〜２７０℃、更に好ましくは２００℃〜２６０℃の温度に設定し得る。 The melting temperature of the propylene-based polymer is not particularly limited, but can be set to a temperature of preferably 180 ° C. to 280 ° C., more preferably 190 ° C. to 270 ° C., and even more preferably 200 ° C. to 260 ° C.
冷却風の温度はプロピレン系重合体が固化する温度であれば特に限定はされないが、好ましくは５℃〜５０℃、より好ましくは１０℃〜４０℃、更に好ましくは１５℃〜３０℃の範囲にある。冷却風はディフューザー内に到達したときには繊維を充分に分散させるための分散媒として作用するため、均一性を確保するための風量としては、通常３０Ｎｍ３／分／ｍ〜１００Ｎｍ３／分／ｍの範囲にある。ここで、冷却風の温度は２０℃〜３０℃であることが好ましく、かつ冷却風の風量は、６０Ｎｍ３／分／ｍ以上であることが好ましく、７５Ｎｍ３／分／ｍ以上であることがより好ましく、９０Ｎｍ３／分／ｍ以上であることが更に好ましい。ただし、安定的に生産する観点から、冷却風の温度が２０℃〜３０℃のときは、風量の上限値として、１５０Ｎｍ３／分／ｍ以下であればよい。延伸風の風速は、通常１００ｍ／分〜１０，０００ｍ／分、好ましくは５００ｍ／分〜１０，０００ｍ／分の範囲にある。 The temperature of the cooling air is not particularly limited as long as it is the temperature at which the propylene-based polymer solidifies, but is preferably in the range of 5 ° C to 50 ° C, more preferably 10 ° C to 40 ° C, and further preferably 15 ° C to 30 ° C. is there. Because when the cooling air reaches the inside diffuser which acts as a dispersion medium for sufficiently disperse the fibers, as the air volume in order to ensure uniformity, usually 30 Nm 3 / min / m~100Nm 3 / min / m It is in the range. Here, it is preferable that the temperature of the cooling air is 20 ° C. to 30 ° C., and the amount of cooling air is preferably at 60 Nm 3 / min / m or more, it is 75 nM 3 / min / m or more More preferably, it is 90 Nm 3 / min / m or more. However, from the viewpoint of stable production, when the temperature of the cooling air is 20 ° C to 30 ° C, the upper limit of the air volume may be 150 Nm 3 / min / m or less. The wind speed of the stretched wind is usually in the range of 100 m / min to 10,000 m / min, preferably 500 m / min to 10,000 m / min.
紡糸孔（ノズル）として、外径が０．５ｍｍ〜５．０ｍｍの範囲で、且つスリット幅が０．０５ｍｍ〜０．５ｍｍの範囲にあり、スリット数としては２〜１０の範囲で、好ましくは３〜６の範囲にあり、複数のスリット間の間隔であるキャナル幅としては０．０４ｍｍ〜０．１５ｍｍの範囲で、ノズル孔面積は０.１ｍｍ２〜０．５ｍｍ２の範囲にある紡糸孔を備えた口金を用いることが好ましい。均一性の高い不織布を得るために、キャナル幅をノズル孔面積で除した値（キャナル幅／ノズル孔面積）が、好ましくは０．３５ｍｍ−１以上、更に好ましくは０．４０ｍｍ−１以上の範囲にある紡糸孔を備えた口金を用いることが好ましい。 The outer diameter of the spinning hole (nozzle) is in the range of 0.5 mm to 5.0 mm, the slit width is in the range of 0.05 mm to 0.5 mm, and the number of slits is in the range of 2 to 10, preferably. is in 3-6 range, the range of 0.04mm~0.15mm as Canal width is the spacing between a plurality of slits, the spinning hole nozzle hole area in the range of 0.1 mm 2 to 0.5 mm 2 It is preferable to use a mouthpiece provided with. In order to obtain a highly uniform non-woven fabric, the value obtained by dividing the canal width by the nozzle hole area (canal width / nozzle hole area) is preferably in the range of 0.35 mm -1 or more, more preferably 0.40 mm -1 or more. It is preferable to use a mouthpiece having a spinning hole in.
本実施形態において、上記紡糸孔におけるキャナル幅とは、例えば、図１あるいは図３に示すプロピレン系重合体などが溶融押出しされる複数のスリット（ノズル孔）のスリット間の幅（間隔）であり、ノズル孔面積は全てのスリット（ノズル孔）の面積を合計した面積である。 In the present embodiment, the canal width in the spinning hole is, for example, the width (interval) between the slits of a plurality of slits (nozzle holes) in which the propylene-based polymer shown in FIG. 1 or 3 is melt-extruded. , The nozzle hole area is the total area of all the slits (nozzle holes).
＜スパンボンド不織布積層体の製造方法＞
本実施形態に用いられるスパンボンド不織布と他の層を積層する（例えば、貼り合せる）場合は、熱エンボス加工、超音波融着等の熱融着法、ニードルパンチ、ウォータージェット等の機械的交絡法、ホットメルト接着剤、ウレタン系接着剤等の接着剤による方法、押出しラミネート等をはじめ、種々公知の方法を採り得る。
<Manufacturing method of spunbonded non-woven fabric laminate>
When laminating (for example, laminating) the spunbonded non-woven fabric used in the present embodiment with another layer, heat embossing, a heat fusion method such as ultrasonic fusion, or mechanical entanglement such as needle punching or water jet. Various known methods can be adopted, including a method, a method using an adhesive such as a hot melt adhesive and a urethane adhesive, and an extruded laminate.
以下、実施例に基づいて本発明の実施形態について更に具体的に説明するが、本発明は、本発明の一実施形態であるこれらの実施例に限定されるものではない。
実施例及び比較例における物性値等は、以下の方法により測定した。
Hereinafter, embodiments of the present invention will be described in more detail based on examples, but the present invention is not limited to these examples, which are embodiments of the present invention.
Physical property values and the like in Examples and Comparative Examples were measured by the following methods.
（１）繊維径〔μｍ〕
得られたスパンボンド不織布を光学顕微鏡〔Ｎｉｋｏｎ社製ＥＣＬＩＰＳＥＥ−４００〕で観察し、画面上のスパンボンド不織布を形成するフィラメントから１００本を選びその繊維径を測定し、その平均値を当該不織布の繊維径とした。
(1) Fiber diameter [μm]
The obtained spunbonded non-woven fabric was observed with an optical microscope [ECLIPSEE-400 manufactured by Nikon Corporation], 100 fibers were selected from the filaments forming the spunbonded non-woven fabric on the screen, the fiber diameters were measured, and the average value was measured for the non-woven fabric. The fiber diameter was used.
（２）目付〔ｇ／ｍ２〕
スパンボンド不織布から１００ｍｍ（流れ方向：ＭＤ）×１００ｍｍ（流れ方向と直交する方向：ＣＤ）の試験片を１０点採取した。試験片の採取場所は、ＣＤ方向にわたって１０箇所とした。次いで、２０℃、相対湿度５０％ＲＨ環境下で、採取した各試験片に対して上皿電子天秤（研精工業社製）を用いて、それぞれ質量〔ｇ〕を測定した。各試験片の質量の平均値を求めた。求めた平均値から１ｍ２当たりの質量〔ｇ〕に換算し、小数点第１位を四捨五入して各不織布サンプルの目付〔ｇ／ｍ２〕とした。
(2) Metsuke [g / m 2 ]
Ten test pieces of 100 mm (flow direction: MD) × 100 mm (direction orthogonal to the flow direction: CD) were collected from the spunbonded non-woven fabric. The test pieces were collected at 10 locations in the CD direction. Then, in an environment of 20 ° C. and a relative humidity of 50% RH, the mass [g] of each of the collected test pieces was measured using a precision electronic balance (manufactured by Kensei Kogyo Co., Ltd.). The average value of the mass of each test piece was calculated. The calculated average value was converted into mass [g] per 1 m 2 , and the first decimal place was rounded off to obtain the basis weight [g / m 2 ] of each non-woven fabric sample.
（３）厚み〔ｍｍ〕
スパンボンド不織布から１００ｍｍ（ＭＤ）×１００ｍｍ（ＣＤ）の試験片を１０点採取した。試験片の採取場所は、目付測定用の試験片と同様の場所とした。次いで、採取した各試験片に対して荷重型厚み計（尾崎製作所社製）を用いて、ＪＩＳ Ｌ １０９６：２０１０に記載の方法で厚み〔ｍｍ〕を測定した。各試験片の厚みの平均値を求め、小数点第２位を四捨五入して各不織布サンプルの厚み〔ｍｍ〕とした。
(3) Thickness [mm]
Ten test pieces of 100 mm (MD) × 100 mm (CD) were collected from the spunbonded non-woven fabric. The test piece was collected at the same place as the test piece for basis weight measurement. Next, the thickness [mm] of each of the collected test pieces was measured by the method described in JIS L 1096: 2010 using a load-type thickness gauge (manufactured by Ozaki Seisakusho Co., Ltd.). The average value of the thickness of each test piece was calculated, and the second decimal place was rounded off to obtain the thickness [mm] of each non-woven fabric sample.
（４）ＴＯ（圧力０．５ｇｆ／ｃｍ２における厚み）−ＴＭ（圧力５０ｇｆ／ｃｍ２における厚み）〔ｍｍ〕
不織布から１５０ｍｍ（ＭＤ）×１５０ｍｍ（ＣＤ）の試験片を２点採取した。なお、採取場所はＣＤ方向にわたって２箇所とした。次いで、試験片をカトーテック（株）製の圧縮試験機ＫＥＳ−ＦＢ３−Ａにより、測定条件として、２０℃、相対湿度５０％ＲＨ環境下で、圧縮子（圧縮面積２ｃｍ２の円形平面をもつ鋼製加圧板）を用い、圧縮変形速度０．０２０ｍｍ／ｓｅｃ、最大圧力５０ｇｆ／ｃｍ２にて圧縮試験を行い、ＴＯ〔ｍｍ〕及びＴＭ〔ｍｍ〕を測定した。
各試験片のＴＯ〔ｍｍ〕及びＴＭ〔ｍｍ〕の平均値を求め各不織布サンプルのＴＯ〔ｍｍ〕およびＴＭ〔ｍｍ〕とした。各不織布サンプルのＴＯ−ＴＭ〔ｍｍ〕を計算した。
(4) TO (thickness at pressure of 50gf / cm 2) (the thickness in the pressure 0.5gf / cm 2) -TM mm.
Two 150 mm (MD) × 150 mm (CD) test pieces were collected from the non-woven fabric. There were two collection locations across the CD direction. Next, the test piece is subjected to a compression tester KES-FB3-A manufactured by Kato Tech Co., Ltd. under a measurement condition of 20 ° C. and a relative humidity of 50% RH environment, and has a compressor (compression area 2 cm 2 circular plane). A compression test was performed at a compression deformation rate of 0.020 mm / sec and a maximum pressure of 50 gf / cm 2 using a steel pressure plate), and TO [mm] and TM [mm] were measured.
The average value of TO [mm] and TM [mm] of each test piece was calculated and used as TO [mm] and TM [mm] of each non-woven fabric sample. The TO-TM [mm] of each non-woven fabric sample was calculated.
（５）剛軟性（カンチレバー平均値）
以下の方法によりカンチレバー試験を実施し、スパンボンド不織布の剛軟性〔ｍｍ〕を測定した。具体的にはＪＩＳ−Ｌ１０９６：２０１０の８．１９．１［Ａ法（４５°カンチレバー法）］に準拠した。
スパンボンド不織布から、２ｃｍ×１５ｃｍの試験片をたて（ＭＤ）方向及びよこ（ＣＤ）方向にそれぞれ５枚採取した。
一端が４５度の斜面をもつ表面の滑らかな水平台の上に、得られた試験片の短辺をスケール基線に合わせて置いた。次に、適当な方法によって試験片を斜面の方向に緩やかに滑らせて、試験片の一端の中央点が斜面と接したときの、試験片の他端の位置をスケールによって読んだ。
剛軟度は、試験片が移動した長さ（ｍｍ）で示され、それぞれ５枚を測り、たて方向（ＭＤ）及びよこ方向（ＣＤ）それぞれの平均値を求めた。次に、それぞれの平均値である、「カンチレバーＭＤ」の値、及び「カンチレバーＣＤ」の値の平均値を求め、カンチレバー平均値を算出した。
(5) Rigidity (average value of cantilever)
A cantilever test was carried out by the following method, and the rigidity [mm] of the spunbonded non-woven fabric was measured. Specifically, it conformed to JIS-L1096: 2010 8.19.1 [A method (45 ° cantilever method)].
Five 2 cm × 15 cm test pieces were collected from the spunbonded non-woven fabric in the vertical (MD) direction and the horizontal (CD) direction.
The short side of the obtained test piece was placed on a smooth horizontal table having a slope of 45 degrees at one end in line with the scale baseline. Next, the test piece was gently slid in the direction of the slope by an appropriate method, and the position of the other end of the test piece when the center point of one end of the test piece came into contact with the slope was read by a scale.
The rigidity and softness were indicated by the length (mm) of movement of the test pieces, and 5 pieces were measured for each, and the average value of each of the vertical direction (MD) and the horizontal direction (CD) was calculated. Next, the average value of each of the "cantilever MD" value and the "cantilever CD" value was obtained, and the cantilever average value was calculated.
（６）耐リウェット性
以下の方法により、リウェット試験を実施し、リウェット量〔ｇ〕を測定することにより、スパンボンド不織布の耐リウェット性を評価した。
イオン交換水１０ｋｇに対し、尿素２００ｇ、塩化ナトリウム８０ｇ、硫酸マグネシウム・７水和物８ｇ、塩化カルシウム・２水和物３ｇ、色素（青色１号）１ｇを混合させることで人工尿を調製した。人工尿を用いてリウェット量の測定を以下の方法で実施した。
エリエールプロダクト社の市販おむつである「Ｇｏｏ．Ｎ 初めての産着お肌が快適まっさらさらテープＭ」の、トップシート及びセカンドシートを剥がして、コアラップが表層の状態にし、かつ横のギャザー部分を取り除き、吸収体層を含むコアラップを取り出した。次に、各実施例で得られたスパンボンド不織布を長さ１５０ｍｍ×幅１２０ｍｍのサイズに切り、その質量（Ｔ１（ｇ））を測定した。その後、各例で得られたスパンボンド不織布を、しわが生じないようにコアラップ上に載せ、軽く押さえた。円筒（直径６０ｍｍ，重さ２００ｇ）を前記スパンボンド不織布の中央部に設置した。そして、人工尿を含ませたピペットを、その先端と前記スパンボンド不織布との間隔が１０ｍｍとなるように、前記スパンボンド不織布の上方に設置し、１６０ｍＬ／２０秒の滴下速度で、ピペットから前記スパンボンド不織布へ人工尿を滴下した。人工尿滴下開始５分後に、予め質量（Ａ（ｇ））を測定した濾紙（アドバンテックＮｏ．２，１００ｍｍ×１００ｍｍ）を、濾紙の中央と人工尿滴下位置とが一致するように前記スパンボンド不織布上に設置し、その上に錘（５ｋｇ／１００ｃｍ２）を設置した。人工尿滴下開始８分後（錘を設置してから３分後）、錘を外して濾紙の質量（Ｂ（ｇ））を測定した。濾紙の質量の変化量（Ｂ（ｇ）−Ａ（ｇ））を算出した。同様の測定を５回繰り返し、その平均値をリウェット量とした。
(6) Rewet resistance A rewet test was carried out by the following method, and the rewet resistance of the spunbonded non-woven fabric was evaluated by measuring the amount of rewet [g].
Artificial urine was prepared by mixing 200 g of urea, 80 g of sodium chloride, 8 g of magnesium sulfate / heptahydrate, 3 g of calcium chloride / dihydrate, and 1 g of dye (blue No. 1) with 10 kg of ion-exchanged water. The amount of rewet was measured using artificial urine by the following method.
Peel off the top sheet and second sheet of Elleair Product's commercially available diaper "Goo.N's first diaper that makes your skin comfortable and smooth", leaving the core wrap on the surface and removing the gathered parts on the sides. , The core wrap containing the absorber layer was removed. Next, the spunbonded nonwoven fabric obtained in each example was cut into a size of 150 mm in length × 120 mm in width, and the mass (T1 (g)) thereof was measured. Then, the spunbonded non-woven fabric obtained in each example was placed on the core wrap so as not to cause wrinkles, and lightly pressed. A cylinder (diameter 60 mm, weight 200 g) was placed in the center of the spunbonded non-woven fabric. Then, a pipette containing artificial urine is placed above the spunbonded non-woven fabric so that the distance between the tip of the pipette and the spunbonded non-woven fabric is 10 mm, and the pipette is charged with a dropping rate of 160 mL / 20 seconds. Artificial urine was dropped onto the spunbonded non-woven fabric. Five minutes after the start of artificial urine dripping, a filter paper (Advantech No. 2,100 mm × 100 mm) whose mass (A (g)) was measured in advance was placed on the spunbonded non-woven fabric so that the center of the filter paper and the artificial urine dripping position coincided with each other. It was installed on top, and a weight (5 kg / 100 cm 2 ) was installed on it. Eight minutes after the start of artificial urine dripping (three minutes after the weight was installed), the weight was removed and the mass of the filter paper (B (g)) was measured. The amount of change in the mass of the filter paper (B (g) -A (g)) was calculated. The same measurement was repeated 5 times, and the average value was taken as the rewet amount.
［実施例１］
プロピレン系重合体として荷重２１６０ｇ、２３０℃のＭＦＲが６０ｇ／１０分のプロピレン・エチレンランダム共重合体（「ｒＰＰ」ともいう。）を用い、押出機（スクリュー径７５ｍｍφ）により成形温度２２０℃で溶融し、ノズルピッチが縦方向３．７ｍｍ、横方向４．０ｍｍで、キャナル幅／孔面積＝０．４２ｍｍ−１の図１に示すような孔形状を有し、図２の繊維断面となるような中空繊維が得られる紡糸口金を配置した図５に示すような不織布製造装置（スパンボンド不織布製造装置、捕集面上の機械の流れ方向に垂直な方向の長さ：３２０ｍｍ）を用いて、冷却流体に（２５℃、流量：７８Ｎｍ３／分／ｍ）の冷却風を用い、ｒＰＰの単孔吐出量を０．５２ｇ／分、糸速度：３１５８ｍ／分で紡糸し、捕集ベルト上に堆積させ、次いで、これをエンボスロールで加熱加圧処理（エンボス面積率：１８％、エンボス温度：１３２℃）し、目付量が１５ｇ／ｍ２の中空繊維からなるスパンボンド不織布を得た。
[Example 1]
Using a propylene / ethylene random copolymer (also referred to as “rPP”) having a load of 2160 g and an MFR of 230 ° C. of 60 g / 10 minutes as a propylene-based polymer, it is melted at a molding temperature of 220 ° C. by an extruder (screw diameter 75 mmφ). The nozzle pitch is 3.7 mm in the vertical direction and 4.0 mm in the horizontal direction, and the canal width / hole area = 0.42 mm -1 has a hole shape as shown in FIG. 1 so as to have the fiber cross section of FIG. Using a non-woven fabric manufacturing apparatus (spunbonded non-woven fabric manufacturing apparatus, length in the direction perpendicular to the flow direction of the machine on the collection surface: 320 mm) as shown in FIG. 5 in which a spun base for obtaining a hollow fiber is arranged. Using cooling air of (25 ° C., flow rate: 78 Nm 3 / min / m) as the cooling fluid, spun the rPP with a single-hole discharge rate of 0.52 g / min and the yarn speed: 3158 m / min, and put it on the collection belt. After depositing, this was heat-pressurized with an embossing roll (embossing area ratio: 18%, embossing temperature: 132 ° C.) to obtain a spunbonded non-woven fabric made of hollow fibers having a grain size of 15 g / m 2.
得られた中空繊維およびスパンボンド不織布の各種物性について、既述の方法により測定を行った。結果を表１に示す。 Various physical properties of the obtained hollow fibers and spunbonded non-woven fabric were measured by the methods described above. The results are shown in Table 1.
［実施例２］
表１に示す条件で、かつ不織布巻き取り速度を調整した以外は実施例１と同様の方法で目付量が１８ｇ／ｍ２の中空繊維からなるスパンボンド不織布を得た。結果を表１に示す。
[Example 2]
A spunbonded nonwoven fabric made of hollow fibers having a basis weight of 18 g / m 2 was obtained in the same manner as in Example 1 except that the conditions shown in Table 1 and the winding speed of the nonwoven fabric were adjusted. The results are shown in Table 1.
［実施例３］
表１に示す条件で、かつ不織布巻き取り速度を調整した以外は実施例１と同様の方法で目付量が２５ｇ／ｍ２の中空繊維からなるスパンボンド不織布を得た。結果を表１に示す。
[Example 3]
A spunbonded nonwoven fabric made of hollow fibers having a basis weight of 25 g / m 2 was obtained in the same manner as in Example 1 except that the conditions shown in Table 1 and the winding speed of the nonwoven fabric were adjusted. The results are shown in Table 1.
［実施例４］
流れ方向に直列に配置された二つのスパンボンド不織布製造装置において、ｒＰＰの単孔吐出量を０．５６ｇ／分とし、押出機（スクリュー径７５ｍｍφ）の成形温度を２５０℃、糸速度：２７４８ｍ／分で紡糸し、二層のスパンボンド不織布を積層させた後にエンボスロールで加熱加圧処理し（エンボス面積率：１８％、エンボス温度：１３２℃）、表１に示す条件で、かつ不織布の巻き取り速度を調整する以外は実施例１と同様の方法で目付量が１０ｇ／ｍ２の中空繊維からなるスパンボンド不織布を用意した。結果を表１に示す。
[Example 4]
In two spunbonded non-woven fabric manufacturing devices arranged in series in the flow direction, the single-hole discharge rate of rPP is 0.56 g / min, the molding temperature of the extruder (screw diameter 75 mmφ) is 250 ° C., and the yarn speed is 2748 m / min. After spinning in minutes and laminating two layers of spunbonded non-woven fabric, heat and pressure treatment is performed with an embossing roll (embossing area ratio: 18%, embossing temperature: 132 ° C.), and the non-woven fabric is wound under the conditions shown in Table 1. A spunbonded non-woven fabric made of hollow fibers having a grain size of 10 g / m 2 was prepared in the same manner as in Example 1 except that the taking speed was adjusted. The results are shown in Table 1.
［実施例５］
流れ方向に直列に配置された三つのスパンボンド不織布製造装置において、プロピレン単独重合体（「ｈＰＰ」ともいう。）の単孔吐出量を０．４２ｇ／分とし、押出機（スクリュー径７５ｍｍφ）の成形温度を２３５℃、糸速度：２９３５ｍ／分で紡糸し、三層のスパンボンド不織布を積層させた後にエンボスロールで加熱加圧処理し（エンボス面積率：１１％、エンボス温度：１３２℃）、表１に示す条件で、かつ不織布の巻き取り速度を調整する以外は実施例１と同様の方法で目付量が１２ｇ／ｍ２の中空繊維からなるスパンボンド不織布を用意した。結果を表１に示す。
[Example 5]
In the three spunbonded non-woven fabric manufacturing apparatus arranged in series in the flow direction, the single-hole discharge amount of the propylene homopolymer (also referred to as "hPP") was set to 0.42 g / min, and the extruder (screw diameter 75 mmφ) The molding temperature was 235 ° C., the yarn speed was 2935 m / min, and three layers of spunbonded non-woven fabric were laminated and then heat-pressurized with an embossing roll (embossing area ratio: 11%, embossing temperature: 132 ° C.). A spunbonded nonwoven fabric made of hollow fibers having a grain size of 12 g / m 2 was prepared in the same manner as in Example 1 except that the conditions shown in Table 1 and the winding speed of the nonwoven fabric were adjusted. The results are shown in Table 1.
［実施例６］
実施例５と同様の方法で紡糸し、不織布巻き取り速度を調整することで目付量が１４ｇ／ｍ２の中空繊維からなるスパンボンド不織布を得た。製造条件、及び結果を表１に示す。
[Example 6]
By spinning in the same manner as in Example 5 and adjusting the winding speed of the nonwoven fabric, a spunbonded nonwoven fabric made of hollow fibers having a basis weight of 14 g / m 2 was obtained. The manufacturing conditions and results are shown in Table 1.
［比較例１］
ノズルを中実繊維を作製するもの（０．６ｍｍφ）に変更し、単孔吐出量を０．４９ｇ／分とし、糸速度：２６４８ｍ／分で紡糸する以外は実施例１と同様の方法により、中実繊維からなるスパンボンド不織布を得た。製造条件、及び結果を表２に示す。
[Comparative Example 1]
The nozzle was changed to one for producing solid fiber (0.6 mmφ), the single-hole discharge rate was 0.49 g / min, and the yarn speed was 2648 m / min, but the same method as in Example 1 was used. A spunbonded non-woven fabric made of solid fibers was obtained. The manufacturing conditions and results are shown in Table 2.
［比較例２〜３］
表２に示す目付となるように不織布巻き取り速度を調整して紡糸する以外は比較例１と同様の方法により、中実繊維からなるスパンボンド不織布を得た。製造条件、及び結果を表２に示す。
[Comparative Examples 2-3]
A spunbonded non-woven fabric made of solid fibers was obtained by the same method as in Comparative Example 1 except that the non-woven fabric winding speed was adjusted so as to have the basis weight shown in Table 2. The manufacturing conditions and results are shown in Table 2.
［比較例４〜９］
使用する原料をｈＰＰに変更し、流れ方向に直列に配置された三つのスパンボンド不織布製造装置を使用し、更に表２に示す単孔吐出量、糸速度となるよう紡糸する以外は比較例１と同様の方法により、中実繊維からなるスパンボンド不織布を得た。製造条件、及び結果を表２に示す。
[Comparative Examples 4 to 9]
Comparative Example 1 except that the raw material used was changed to hPP, three spunbonded non-woven fabric manufacturing devices arranged in series in the flow direction were used, and the yarn was spun so as to have the single-hole discharge amount and yarn speed shown in Table 2. A spunbonded non-woven fabric made of solid fibers was obtained by the same method as in the above. The manufacturing conditions and results are shown in Table 2.
なお、表１及び表２中、「−」は、未測定であることを意味する。 In addition, in Table 1 and Table 2, "-" means that it has not been measured.
表１の結果より、実施例で得た中空繊維からなるスパンボンド不織布は、既述の（Ａ）〜（Ｃ）の条件を満たしており、柔軟性に優れ、圧縮特性にも優れることがわかる。また、表１及び表２の結果より、実施例１〜３で得られた中空繊維からなるスパンボンド不織布と比較例１〜３で得られた中実繊維からなるスパンボンド不織布について、それぞれ同じ値の目付同士を比較した場合、実施例で得られたものの方が、比較例で得られたものに比べ、耐リウェット性に優れることがわかる。
これらの評価結果より、本実施形態のスパンボンド不織布は、軽量性、柔軟性、及び耐リウェット性が要求される吸収用物品としての各用途に適用した場合に好適であることが分かる。
From the results in Table 1, it can be seen that the spunbonded non-woven fabric made of hollow fibers obtained in the examples satisfies the above-mentioned conditions (A) to (C), has excellent flexibility, and has excellent compression characteristics. .. Further, from the results of Tables 1 and 2, the same values were obtained for the spunbonded nonwoven fabric made of hollow fibers obtained in Examples 1 to 3 and the spunbonded nonwoven fabric made of solid fibers obtained in Comparative Examples 1 to 3. When comparing the basis weights of the above, it can be seen that the one obtained in the example is superior in the rewet resistance to the one obtained in the comparative example.
From these evaluation results, it can be seen that the spunbonded nonwoven fabric of the present embodiment is suitable when applied to each application as an absorbent article that requires light weight, flexibility, and rewet resistance.
１・・・押出機
２・・・紡糸口金
３・・・中空繊維
４・・・冷却風
５・・・ディフューザー
６・・・捕捉装置
７・・・吸引装置
８・・・スパンボンド不織布
1 ... Extruder 2 ... Spinning spout 3 ... Hollow fiber 4 ... Cooling air 5 ... Diffuser 6 ... Capture device 7 ... Suction device 8 ... Spun-bonded non-woven fabric
Claims (8)
ＪＩＳ−Ｌ１０９６：２０１０に準拠して測定された剛軟度［ｍｍ］の平均値（Ｘ）、 及び、ＫＥＳ法による圧縮試験で測定した圧力０．５ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＯ、ＫＥＳ法による圧縮試験で測定した圧力５０ｇｆ／ｃｍ２における厚み［ｍｍ］をＴＭとしたときのＴＯ−ＴＭ（Ｙ）が下記条件（Ａ）〜（Ｃ）を満たすスパンボンド不織布を含む吸収用物品。
（Ａ）：２０≦Ｘ≦４５
（Ｂ）：０．１００≦Ｙ≦０．１２７
（Ｃ）：Ｙ≦０．０００８Ｘ＋０．０９１ Consists of hollow fibers of propylene polymer
The average value (X) of rigidity [mm] measured in accordance with JIS-L1096: 2010 and the thickness [mm] at a pressure of 0.5 gf / cm 2 measured by the compression test by the KES method are TO. Absorbent article containing spunbonded non-woven fabric in which TO-TM (Y) satisfies the following conditions (A) to (C) when the thickness [mm] at a pressure of 50 gf / cm 2 measured by the compression test by the KES method is TM. ..
(A): 20 ≦ X ≦ 45
(B): 0.100 ≤ Y ≤ 0.127
(C): Y ≦ 0.0008X + 0.091
前記吸収体層の少なくとも一方の面に設けられる、前記スパンボンド不織布を含む透液層と、
を含む請求項１〜請求項６のいずれか一項に記載の吸収用物品。 Absorbent layer containing water-absorbent polymer and
A liquid permeable layer containing the spunbonded non-woven fabric provided on at least one surface of the absorber layer, and
The absorbent article according to any one of claims 1 to 6, which comprises.
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| WO2012111723A1 (en) * | 2011-02-15 | 2012-08-23 | 三井化学株式会社 | Spunbonded nonwoven fabric |
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