JP5188481B2 - Fiber, non-woven fabric and its use - Google Patents
Fiber, non-woven fabric and its use Download PDFInfo
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- 239000004745 nonwoven fabric Substances 0.000 title claims description 109
- 239000000835 fiber Substances 0.000 title claims description 93
- -1 fatty acid ester Chemical class 0.000 claims description 37
- 229920000098 polyolefin Polymers 0.000 claims description 33
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 19
- 239000000194 fatty acid Substances 0.000 claims description 19
- 229930195729 fatty acid Natural products 0.000 claims description 19
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 229920005604 random copolymer Polymers 0.000 claims description 13
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 9
- 239000004711 α-olefin Substances 0.000 claims description 9
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 30
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 22
- 229920001155 polypropylene Polymers 0.000 description 18
- 239000000779 smoke Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 15
- 239000002202 Polyethylene glycol Substances 0.000 description 14
- 229920001223 polyethylene glycol Polymers 0.000 description 14
- 230000000704 physical effect Effects 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 238000009987 spinning Methods 0.000 description 11
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000004049 embossing Methods 0.000 description 10
- 150000002148 esters Chemical class 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 9
- 239000005977 Ethylene Substances 0.000 description 9
- 239000004743 Polypropylene Substances 0.000 description 9
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 8
- 229920000092 linear low density polyethylene Polymers 0.000 description 8
- 239000004707 linear low-density polyethylene Substances 0.000 description 8
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 7
- 239000004594 Masterbatch (MB) Substances 0.000 description 5
- 150000005690 diesters Chemical class 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 229920001384 propylene homopolymer Polymers 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012768 molten material Substances 0.000 description 4
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 210000002700 urine Anatomy 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 3
- 229920005630 polypropylene random copolymer Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000004750 melt-blown nonwoven Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000002667 nucleating agent Substances 0.000 description 2
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 1
- ZVUNTIMPQCQCAQ-UHFFFAOYSA-N 2-dodecanoyloxyethyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OCCOC(=O)CCCCCCCCCCC ZVUNTIMPQCQCAQ-UHFFFAOYSA-N 0.000 description 1
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- GHVNFZFCNZKVNT-UHFFFAOYSA-N Decanoic acid Natural products CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 241000270666 Testudines Species 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- IYYGCUZHHGZXGJ-UHFFFAOYSA-N but-1-ene;ethene;prop-1-ene Chemical compound C=C.CC=C.CCC=C IYYGCUZHHGZXGJ-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010035 extrusion spinning Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000004751 flashspun nonwoven Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- WHFQAROQMWLMEY-UHFFFAOYSA-N propylene dimer Chemical group CC=C.CC=C WHFQAROQMWLMEY-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Absorbent Articles And Supports Therefor (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
Description
紡糸性が良好で、紡糸時の発煙が抑制され、且つ、初期親水性及び耐久親水性に優れる繊維、かかる繊維を含む不織布に関する。 The present invention relates to a fiber having good spinnability, smoke generation during spinning being suppressed, and excellent initial hydrophilicity and durable hydrophilicity, and a nonwoven fabric including such a fiber.
ポリプロピレンに代表されるオレフィン系重合体から得られる不織布は通気性、柔軟性、軽量性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。 Nonwoven fabrics obtained from olefin polymers typified by polypropylene are widely used in various applications because of their excellent breathability, flexibility and lightness. For this reason, the nonwoven fabric is required to have various properties according to its use and to improve the properties.
一方、オレフィン系重合体からなる不織布は、本質的に疎水性であるので、紙おむつ、生理用ナプキン等の衛生材料のトップシート、ワイパーなどに使用するには、親水処理することが必須である。 On the other hand, non-woven fabrics made of olefin polymers are inherently hydrophobic, and therefore hydrophilic treatment is essential for use in sanitary materials such as disposable diapers and sanitary napkins.
オレフィン系重合体を親水化処理する方法の一つとして、特定の範囲の平均分子量を有するポリオキシエチレンのジ脂肪酸エステルを用いる方法（特許文献１：特表平９−５０３８２９号公報、あるいは特許文献２：特表２００６−５０８１９４号公報）が提案されている。 As a method for hydrophilizing an olefin polymer, a method using a dioxy fatty acid ester of polyoxyethylene having an average molecular weight in a specific range (Patent Document 1: JP 9-503829 A, or Patent Document) 2: Japanese Translation of PCT International Publication No. 2006-508194).
しかしながら、特許文献１の実施例１及び実施例５に記載されている不飽和カルボン酸のジエステルである平均分子量４００のポリエチレン酸化物のジオレイン酸エステルをポリプロピレンに添加してスパンボンド不織布を製造した場合は、紡糸時の発煙が多く、得られるスパンボンド不織布の初期親水性が非常に劣り、熱処理などにより「活性化」しない限り親水性が全く得られないことがわかった。 However, when a spunbond nonwoven fabric is produced by adding dioleic acid ester of polyethylene oxide having an average molecular weight of 400, which is a diester of unsaturated carboxylic acid described in Example 1 and Example 5 of Patent Document 1, to polypropylene It was found that the spunbond nonwoven fabric obtained had a lot of smoke during spinning, and the initial hydrophilicity of the obtained spunbonded nonwoven fabric was very poor, and no hydrophilicity could be obtained unless it was “activated” by heat treatment or the like.
一方、特許文献２に記載された発明は、ポリプロピレンスパンボンド不織布などの繊維の柔軟仕上げに用いるものであって、親水化処理を目的とするものではないと記載されている。そして、公表特許公報の段落［００１４］には、ポリエチレングリコール（分子量４００）とデカン酸（炭素数：１０）またはラウリン酸（炭素数：１２）との反応生成物の使用が特に好ましい、と記載されている。 On the other hand, the invention described in Patent Document 2 is used for soft finishing of fibers such as polypropylene spunbonded nonwoven fabric, and is not intended for hydrophilic treatment. In paragraph [0014] of the published patent publication, it is described that the use of a reaction product of polyethylene glycol (molecular weight 400) and decanoic acid (carbon number: 10) or lauric acid (carbon number: 12) is particularly preferable. Has been.
特許文献２に記載の、平均分子量４００のポリエチレングリコールのジラウリン酸エステルをポリプロピレンに添加して得られるスパンボンド不織布は、柔軟性の他に、初期親水性や耐久親水性は良好であるものの、高温で押出成形し紡糸する際の発煙が多く、この発煙成分が製造設備を汚染するため、安定的な生産を持続することが困難であることがわかった。 The spunbonded nonwoven fabric obtained by adding a dilauric acid ester of polyethylene glycol having an average molecular weight of 400 described in Patent Document 2 to polypropylene has good initial hydrophilicity and durable hydrophilicity in addition to flexibility, but has a high temperature. It has been found that it is difficult to maintain stable production because of the large amount of smoke generated during extrusion molding and spinning, and this smoke component contaminates the production equipment.
本発明者らは、不織布の製造時に発煙が低減され、しかも、不織布の製造後短時間に親水性（初期親水性）が発現し、且つ、熱処理の有無に関わらず親水性が持続（耐久親水性）するという、耐発煙性に優れ、しかも初期親水性及び耐久親水性が共に優れるオレフィン重合体不織布に好適な繊維及び不織布を開発することを目的とし、種々検討した結果、
親水剤として、非イオン系界面活性剤として特定のポリアルキレングリコールのジ飽和脂肪酸エステルを添加・混合することにより、本発明の目的を達成し得ることを見出した。
The inventors of the present invention have reduced smoke generation during the production of a non-woven fabric, and developed a hydrophilic property (initial hydrophilic property) in a short time after the production of the non-woven fabric, and the hydrophilic property is maintained regardless of the presence or absence of heat treatment (durable hydrophilic property). For the purpose of developing fibers and nonwoven fabrics suitable for olefin polymer nonwoven fabrics that are excellent in smoke resistance and excellent in both initial hydrophilicity and durable hydrophilicity.
It has been found that the object of the present invention can be achieved by adding and mixing a specific polyalkylene glycol disaturated fatty acid ester as a nonionic surfactant as a hydrophilic agent.
本発明は、オレフィン系重合体１００重量部に対して、下記化学式（１）で表されるポリアルキレングリコールのジ飽和脂肪酸エステルを０．５〜５重量部含むオレフィン系重合体組成物からなる繊維、当該繊維を含む不織布及びその用途を提供することにある。 The present invention is a fiber comprising an olefin polymer composition containing 0.5 to 5 parts by weight of a disaturated fatty acid ester of polyalkylene glycol represented by the following chemical formula (1) with respect to 100 parts by weight of an olefin polymer. It is in providing the nonwoven fabric containing the said fiber, and its use.
Ｒ−ＣＯＯ−（ＣｎＨ2ｎＯ）ｘ−ＣＯ−Ｒ 式（１）
［式中、Ｒは炭素数が１３〜１７のアルキル基であり、（ＣｎＨ2ｎＯ）ｘのｎは２〜４の整数であり、ｘは１０〜２３である。）
R-COO- (C n H 2n O) x -CO-R expression (1)
[Wherein, R is an alkyl group having 13 to 17 carbon atoms, n in (C n H 2n O) x is an integer of 2 to 4, and x is 10 to 23]. )
本発明に係わる特定のポリアルキレングリコールのジ飽和脂肪酸エステルを含むオレフィン系重合体組成物は、不織布などの繊維を紡糸する際の発煙が抑制され、しかも、得られる繊維及び不織布は、製造後の親水性の発現時間が３時間以下と極めて短く、しかも、８０℃で２時間熱処理する前後も親水性が持続し、初期親水性及び耐久親水性が共に優れるという特徴を有する。 The olefin polymer composition containing the disaturated fatty acid ester of a specific polyalkylene glycol according to the present invention suppresses smoke generation when spinning a fiber such as a nonwoven fabric, and the resulting fiber and nonwoven fabric are manufactured after production. The hydrophilic expression time is as extremely short as 3 hours or less, and the hydrophilicity is maintained before and after the heat treatment at 80 ° C. for 2 hours, and both initial hydrophilicity and durable hydrophilicity are excellent.
＜オレフィン系重合体＞
本発明の繊維及び当該繊維を含む不織布を形成するオレフィン系重合体は、エチレン、プロピレン、１−ブテン、１−ヘキセン、４−メチル−１−ペンテン及び１−オクテン等のα−オレフィンの単独若しくは共重合体であり、具体的には、高圧法低密度ポリエチレン、線状低密度ポリエチレン（所謂ＬＬＤＰＥ）、高密度ポリエチレン、エチレン・プロピレンランダム共重合体、エチレン・１−ブテンランダム共重合体等のエチレンの単独重合体あるいはエチレン・α−オレフィン共重合体等のエチレン系重合体；プロピレンの単独重合体（所謂ポリプロピレン）、プロピレン・エチレンランダム共重合体、プロピレン・エチレン・１−ブテンランダム共重合体（所謂ランダムポリプロピレン）、プロピレンブロック共重合体、プロピレン・１−ブテンランダム共重合体等のプロピレン系重合体；１−ブテン単独重合体、１−ブテン・エチレン共重合体、１−ブテン・プロピレン共重合体等の１−ブテン系重合体；ポリ４−メチル−１−ペンテン等が挙げられる。
<Olefin polymer>
The olefin polymer forming the fiber of the present invention and the nonwoven fabric containing the fiber is an α-olefin such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene alone or Specifically, high pressure method low density polyethylene, linear low density polyethylene (so-called LLDPE), high density polyethylene, ethylene / propylene random copolymer, ethylene / 1-butene random copolymer, etc. Ethylene polymers such as ethylene homopolymers or ethylene / α-olefin copolymers; propylene homopolymers (so-called polypropylene), propylene / ethylene random copolymers, propylene / ethylene / 1-butene random copolymers (So-called random polypropylene), propylene block copolymer, propylene Propylene polymers such as 1-butene random copolymer; 1-butene polymers such as 1-butene homopolymer, 1-butene / ethylene copolymer, 1-butene / propylene copolymer; poly-4- And methyl-1-pentene.
これらオレフィン系重合体の中でも、プロピレン系重合体が、成形時の紡糸安定性や不織布の加工性及び通気性、柔軟性、軽量性、耐熱性に優れる不織布が得られるので、好ましい。 Among these olefin polymers, a propylene polymer is preferable because a nonwoven fabric excellent in spinning stability during molding, processability and breathability of the nonwoven fabric, flexibility, light weight, and heat resistance can be obtained.
本発明に係るオレフィン系重合体には、本発明の目的を損なわない範囲で、親水性を促進または抑制する助剤、通常用いられる酸化防止剤、耐候安定剤、耐光安定剤、ブロッキング防止剤、滑剤、核剤、顔料、柔軟剤、撥水剤、フィラー、抗菌剤等の添加剤あるいはオレフィン系重合体以外の重合体を必要に応じて配合することができる。 In the olefin polymer according to the present invention, an auxiliary agent that promotes or suppresses hydrophilicity within a range that does not impair the object of the present invention, a commonly used antioxidant, weathering stabilizer, light stabilizer, antiblocking agent, Additives such as a lubricant, a nucleating agent, a pigment, a softening agent, a water repellent, a filler, an antibacterial agent, or a polymer other than an olefin polymer can be blended as necessary.
＜プロピレン系重合体＞
本発明に係わるプロピレン系重合体としては、融点（Ｔｍ）が１２５℃以上、好ましくは１３０〜１６５℃の範囲にあるプロピレンの単独重合体若しくはプロピレンと少量のエチレン、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（但し炭素数３を除く）、好ましくは２〜８（但し炭素数３を除く）の１種または２種以上のα−オレフィンとの共重合体である。
<Propylene polymer>
As the propylene polymer according to the present invention, a propylene homopolymer having a melting point (Tm) of 125 ° C. or higher, preferably 130 to 165 ° C., or a small amount of ethylene, 1-butene, 1-pentene, 1 or more of 2 or more carbon atoms (excluding 3 carbon atoms) such as 1-hexene, 1-octene, 4-methyl-1-pentene, preferably 2 to 8 (excluding 3 carbon atoms) It is a copolymer with an α-olefin.
本発明に係わるプロピレン系重合体は、溶融紡糸し得る限り、メルトフローレート（Ｍ
ＦＲ：ＡＳＴＭＤ−１２３８、２３０℃、荷重２１６０ｇ）は特に限定はされないが、通常、１〜１０００ｇ／１０分、好ましくは５〜５００ｇ／１０分、さらに好ましくは１０〜１００ｇ／１０分の範囲にある。
The propylene polymer according to the present invention has a melt flow rate (M
FR: ASTM D-1238, 230 ° C., load 2160 g) is not particularly limited, but is usually in the range of 1 to 1000 g / 10 minutes, preferably 5 to 500 g / 10 minutes, and more preferably 10 to 100 g / 10 minutes. .
本発明に係わるプロピレン系重合体の中でも、融点（Ｔｍ）が１２５〜１５５℃、好ましくは１３０〜１４７℃の範囲にあるプロピレンと少量のエチレン、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−オレフィンとのプロピレン・α−オレフィンランダム共重合体が、柔軟性、初期親水性に優れる不織布が得られるので、とくに好ましい。 Among the propylene polymers according to the present invention, propylene and a small amount of ethylene, 1-butene, 1-pentene, 1-hexene, having a melting point (Tm) in the range of 125 to 155 ° C, preferably 130 to 147 ° C, -Propylene / α-olefin random copolymer with 2 or more carbon atoms, preferably 2 to 8 or more α-olefins such as octene and 4-methyl-1-pentene is flexible, initial This is particularly preferable because a nonwoven fabric having excellent hydrophilicity can be obtained.
プロピレン・α−オレフィンランダム共重合体におけるα−オレフィンの含有量は、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１〜１０モル％の範囲にある。より好ましくは１〜５モル％である。 The α-olefin content in the propylene / α-olefin random copolymer is not particularly limited as long as the melting point (Tm) is in the above range, but is usually in the range of 1 to 10 mol%. More preferably, it is 1-5 mol%.
＜ポリアルキレングリコールのジ飽和脂肪酸エステル＞
本発明に係わるポリアルキレングリコールのジ飽和脂肪酸エステルは、下記化学式（１）で表されるポリアルキレングリコールのジ飽和脂肪酸エステルである。
<Disaturated fatty acid ester of polyalkylene glycol>
The disaturated fatty acid ester of polyalkylene glycol according to the present invention is a disaturated fatty acid ester of polyalkylene glycol represented by the following chemical formula (1).
Ｒ−ＣＯＯ−（ＣｎＨ2ｎＯ）ｘ−ＣＯ−Ｒ 式（１）
［式中、Ｒは炭素数が１３〜１７のアルキル基であり、（ＣｎＨ2ｎＯ）ｘのｎは２〜４の整数であり、ｘは１０〜２３である。］
式（１）中、Ｒ基としては、具体的には、ＣＨ3‐（ＣＨ2）12基（トリデシル基）、ＣＨ3‐（ＣＨ2）13基（テトラデシル基）、ＣＨ3‐（ＣＨ2）14基（ペンタデシル基）、ＣＨ3‐（ＣＨ2）15基（ヘキサデシル基）、ＣＨ3‐（ＣＨ2）16基（ヘプタデシル基）、及びＣＨ3‐（ＣＨ2）17基（オクタデシル基）である。
R-COO- (C n H 2n O) x -CO-R expression (1)
[Wherein, R is an alkyl group having 13 to 17 carbon atoms, n in (C n H 2n O) x is an integer of 2 to 4, and x is 10 to 23]. ]
In the formula (1), as the R group, specifically, a CH 3- (CH 2 ) 12 group (tridecyl group), a CH 3- (CH 2 ) 13 group (tetradecyl group), a CH 3- (CH 2 ) 14 groups (pentadecyl group), CH 3- (CH 2 ) 15 groups (hexadecyl group), CH 3- (CH 2 ) 16 groups (heptadecyl group), and CH 3- (CH 2 ) 17 groups (octadecyl group) It is.
初期親水性を考慮すると、Ｒ基が、ＣＨ3‐（ＣＨ2）12基（トリデシル基）、ＣＨ3‐（ＣＨ2）13基（テトラデシル基）、ＣＨ3‐（ＣＨ2）14基（ペンタデシル基）、及びＣＨ3‐（ＣＨ2）15基（ヘキサデシル基）が好ましくい。 In consideration of the initial hydrophilicity, the R group is CH 3- (CH 2 ) 12 group (tridecyl group), CH 3- (CH 2 ) 13 group (tetradecyl group), CH 3- (CH 2 ) 14 group (pentadecyl) Group) and CH 3- (CH 2 ) 15 group (hexadecyl group) are preferred.
式（１）中、（ＣｎＨ2ｎＯ）ｘ基は、具体的には、エチレンオキサイド、プロピレンオキサイド及びブチレンオキサイドの付加物、好ましくはエチレンオキサイドの付加物であって、平均分子量が４００〜１０００、好ましくは６００〜８００である。 In the formula (1), the (C n H 2n O) x group is specifically an adduct of ethylene oxide, propylene oxide and butylene oxide, preferably an adduct of ethylene oxide, having an average molecular weight of 400 to 1000, preferably 600-800.
Ｒの炭素数が１１のＣＨ3‐（ＣＨ2）10基（ウンデシル基）を有するポリアルキレングリコールのジ飽和脂肪酸エステルは、紡糸時の発煙が激しく、且つ、得られる不織布は親水性、とくに、耐久親水性が劣る。一方、Ｒの炭素数が１８のＣＨ3‐（ＣＨ2）17基（オクタデシル基）あるいはＣＨ3−（ＣＨ2）7ＣＨ＝ＣＨ（ＣＨ2）7基を有するポリアルキレングリコールのジ飽和脂肪酸エステルは、紡糸時の発煙は抑制されるが、得られる不織布は初期親水性及び耐久親水性に劣る。 The disaturated fatty acid ester of polyalkylene glycol having a CH 3- (CH 2 ) 10 group (undecyl group) having 11 carbon atoms in R is highly fuming during spinning, and the resulting nonwoven fabric is hydrophilic. Durable hydrophilicity is inferior. On the other hand, a disaturated fatty acid ester of polyalkylene glycol having CH 3 — (CH 2 ) 17 group (octadecyl group) or CH 3 — (CH 2 ) 7 CH═CH (CH 2 ) 7 group having 18 carbon atoms in R Although smoke generation during spinning is suppressed, the obtained nonwoven fabric is inferior in initial hydrophilicity and durable hydrophilicity.
（ＣｎＨ2ｎＯ）ｘ基の分子量が４００以下の場合、得られる不織布の初期親水性は優れるが、成形時の発煙が多いため、安定生産上好ましくない。また、得られた不織布を水中に浸漬すると経時的に親水剤成分が溶出する。水への溶出が多いと、製造時や使用時に水と接触した際、その残留水が白濁したりして、排水の際に特別な処理が必要になる場合があるため好ましくない。一方、（ＣｎＨ2ｎＯ）ｘ基の分子量が８００以上の場合、成形時の発煙や水中での親水剤の溶出は少ないが、得られる不織布の親水性が劣ったり、原料を押出機に導入して溶融成形する際に原料の食込み不良が著しくなり良好な繊維及び不織布が得られないため、好ましくない。 (C n H 2n O) When the molecular weight of the x group is 400 or less, the initial hydrophilicity of the resulting nonwoven fabric is excellent, but it is unfavorable for stable production because it produces a lot of smoke during molding. Moreover, when the obtained nonwoven fabric is immersed in water, a hydrophilic agent component will elute over time. When the amount of elution into water is large, when it comes into contact with water during production or use, the residual water may become cloudy and a special treatment may be required during drainage, which is not preferable. On the other hand, when the molecular weight of the (C n H 2n O) x group is 800 or more, smoke generation during molding and elution of the hydrophilic agent in water are small, but the hydrophilicity of the resulting nonwoven fabric is inferior, and the raw material is used as an extruder. When introduced and melt-molded, the raw material is poorly bitten, and good fibers and nonwoven fabrics cannot be obtained.
また、Ｒ−ＣＯＯ−（ＣｎＨ2ｎＯ）ｘ−Ｈで表されるポリアルキレングリコールのモノ飽和脂肪酸エステルは、押出成形性に劣り、良好な繊維及び不織布が得られない。成形できた場合でも成形時の発煙が多いため安定生産上好ましくない。 Moreover, the monosaturated fatty acid ester of polyalkylene glycol represented by R—COO— (C n H 2n O) x —H is inferior in extrusion moldability, and good fibers and nonwoven fabrics cannot be obtained. Even if it can be molded, there is much smoke during molding, which is not preferable for stable production.
＜オレフィン系重合体組成物＞
本発明に係わるオレフィン系重合体組成物は、前記オレフィン系重合体１００重量部に対して、前記ポリアルキレングリコールのジ飽和脂肪酸エステルを０．５〜５重量部、好ましくは１〜３重量部含む組成物である。
<Olefin polymer composition>
The olefin polymer composition according to the present invention contains 0.5 to 5 parts by weight, preferably 1 to 3 parts by weight, of the disaturated fatty acid ester of the polyalkylene glycol with respect to 100 parts by weight of the olefin polymer. It is a composition.
ポリアルキレングリコールのジ飽和脂肪酸エステルの量が０．５重量部未満では、親水性が劣る。一方、上限は特に限定はされないが、5重量部を超えると、親水性が飽和するともに、得られる繊維及び当該繊維を含む不織布の表面に滲み出すポリアルキレングリコールのジ飽和脂肪酸エステルの量が多くなり、成形加工性が低下する。 When the amount of the disaturated fatty acid ester of polyalkylene glycol is less than 0.5 parts by weight, the hydrophilicity is poor. On the other hand, the upper limit is not particularly limited, but when it exceeds 5 parts by weight, the hydrophilicity is saturated, and the amount of the disaturated fatty acid ester of polyalkylene glycol that exudes to the surface of the obtained fiber and the nonwoven fabric containing the fiber is large. As a result, molding processability is reduced.
本発明に係るオレフィン系重合体組成物を用意する場合は、前記ポリアルキレングリコールのジ飽和脂肪酸エステルを、５重量％を超える、例えば、１０〜７０重量％と高濃度に含むペレット状のマスターバッチとしておくと、繊維及び不織布の製造時にポリアルキレングリコールのジ飽和脂肪酸エステルの添加及び前記オレフィン系重合体との混合が容易となるので好ましい。ポリアルキレングリコールのジ飽和脂肪酸エステルのマスターバッチに用いるオレフィン系重合体は、前記オレフィン系重合体に限らず、他のオレフィン系重合体を用いてもよい。かかるマスターバッチに用いるオレフィン系重合体は目的とする繊維及び当該繊維を含む不織布に応じて、ＭＦＲを適宜選択し得る。 When preparing the olefin polymer composition according to the present invention, a pellet-like masterbatch containing a disaturated fatty acid ester of the polyalkylene glycol in a high concentration exceeding 5% by weight, for example, 10 to 70% by weight. It is preferable that the addition of a disaturated fatty acid ester of polyalkylene glycol and the mixing with the olefin polymer are facilitated during the production of fibers and nonwoven fabrics. The olefin polymer used in the master batch of the disaturated fatty acid ester of polyalkylene glycol is not limited to the olefin polymer, and other olefin polymers may be used. As the olefin polymer used in such a master batch, MFR can be appropriately selected according to the target fiber and the nonwoven fabric containing the fiber.
本発明に係るオレフィン系重合体組成物には、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、ブロッキング防止剤、滑剤、核剤、顔料等の添加剤あるいはオレフィン系重合体以外の重合体を必要に応じて配合することができる。 In the olefin polymer composition according to the present invention, an antioxidant, a weather stabilizer, a light stabilizer, an antiblocking agent, a lubricant, a nucleating agent, a pigment, and the like that are usually used within a range not impairing the object of the present invention. Polymers other than additives or olefin polymers can be blended as required.
＜繊維及び不織布＞
本発明の繊維及び当該繊維を含む不織布は、前記オレフィン系重合体と前記ポリアルキレングリコールのジ飽和脂肪酸エステルを含むオレフィン系重合体組成物の繊維及び当該繊維を含む不織布である。
<Fiber and non-woven fabric>
The fiber of this invention and the nonwoven fabric containing the said fiber are the fiber of the olefin polymer composition containing the di-saturated fatty acid ester of the said olefin polymer and the said polyalkylene glycol, and the nonwoven fabric containing the said fiber.
本発明の繊維及び当該繊維を含む不織布は、初期親水性に優れるが、使用するオレフィン系重合体と前記ポリアルキレングリコールのジ飽和脂肪酸エステルとの組合せによって初期親水性が不足する場合は、得られた不織布を、熱処理することで親水性を発現させることができる。この場合の熱処理の条件は、使用するオレフィン系重合体の性状によるが、一般的には４０〜９０℃の温度で５分から２時間程度行うのが好ましい。 The fiber of the present invention and the nonwoven fabric containing the fiber are excellent in initial hydrophilicity, but are obtained when the initial hydrophilicity is insufficient due to the combination of the olefin polymer used and the disaturated fatty acid ester of the polyalkylene glycol. Hydrophilicity can be expressed by heat-treating the non-woven fabric. The heat treatment conditions in this case depend on the properties of the olefin polymer to be used, but it is generally preferable to carry out at a temperature of 40 to 90 ° C. for about 5 minutes to 2 hours.
本発明の繊維は、通常、繊度が０．５〜５デニールの範囲にある。本発明の繊維は短繊維であってもよいが、長繊維であることが、得られる不織布からの繊維の脱落等がないので好ましい。 The fibers of the present invention usually have a fineness in the range of 0.5 to 5 denier. Although the fiber of the present invention may be a short fiber, it is preferable that the fiber is a long fiber because the fiber does not fall off from the resulting nonwoven fabric.
本発明の繊維は、サイド・バイ・サイド型の少なくとも2成分以上の繊維からなる捲縮繊維であっても良い。好ましくは、プロピレンの単独重合体とプロピレン・エチレンランダム共重合体からなるサイド・バイ・サイド型の捲縮繊維を含んでも良い。本発明の繊維は、かかる捲縮繊維とその他の非捲縮繊維との混繊繊維であっても良い。また、繊維の断面形状は丸型の他にＶ字型、十字型、Ｔ字型などの異型断面であっても良い。 The fiber of the present invention may be a crimped fiber composed of fibers of at least two components of side-by-side type. Preferably, a side-by-side type crimped fiber made of a propylene homopolymer and a propylene / ethylene random copolymer may be included. The fiber of the present invention may be a mixed fiber of such a crimped fiber and other non-crimped fibers. Further, the cross-sectional shape of the fiber may be an irregular cross-section such as a V shape, a cross shape, or a T shape in addition to the round shape.
本発明の不織布は、用途により、種々公知の交絡方法、例えば、ニードルパンチ、ウォータージェット、超音波等の手段を用いる方法、あるいはエンボスロールを用いる熱エンボス加工またはホットエアースルーを用いることにより一部熱融着する方法により交絡しておいてもよい。かかる交絡方法は単独でも複数の交絡方法を組み合わせて用いてもよい。 The nonwoven fabric of the present invention is partially used by various known entanglement methods, for example, a method using means such as needle punching, water jet, and ultrasonic waves, or hot embossing using an embossing roll or hot air through. It may be entangled by a method of heat fusion. Such entanglement methods may be used alone or in combination with a plurality of entanglement methods.
熱エンボス加工により熱融着する場合は、通常、エンボス面積率が５〜３０％、好ましくは５〜２０％の範囲にある。刻印形状は、円、楕円、長円、正方、菱、長方、四角、キルト、格子、亀甲やそれら形状を基本とする連続した形が例示される。 When heat-sealing by hot embossing, the embossed area ratio is usually in the range of 5 to 30%, preferably 5 to 20%. Examples of the stamped shape include a circle, an ellipse, an ellipse, a square, a rhombus, a rectangle, a square, a quilt, a lattice, a turtle shell, and a continuous shape based on these shapes.
本発明の不織布は、種々用途により、単独でも他の層と積層して用いてもよい。 The nonwoven fabric of the present invention may be used alone or laminated with other layers depending on various applications.
本発明の不織布と積層される他の層は、具体的には、例えば、編布、織布、不織布、フィルム、紙製品等を挙げることができる。本発明の不織布と他の層を積層する（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。本発明の不織布は、ホットメルト接着剤や押出しラミネート等、高温物質と接触する工程を経た後も、親水性が持続するので、製品の品質管理上、利便性が高い。 Specifically, the other layer laminated | stacked with the nonwoven fabric of this invention can mention a knitted fabric, a woven fabric, a nonwoven fabric, a film, a paper product etc., for example. When laminating (bonding) the nonwoven fabric of the present invention and other layers, thermal embossing, thermal fusion methods such as ultrasonic fusion, mechanical entanglement methods such as needle punch and water jet, hot melt adhesive, Various known methods such as a method using an adhesive such as a urethane-based adhesive, extrusion lamination, and the like can be adopted. The non-woven fabric of the present invention is highly convenient in terms of product quality control because it remains hydrophilic even after a process of contacting with a high-temperature substance such as a hot melt adhesive or extrusion lamination.
本発明の不織布と積層される不織布としては、他のスパンボンド不織布、メルトブロー不織布、湿式不織布、乾式不織布、乾式パルプ不織布、フラッシュ紡糸不織布、開繊不織布等、種々公知の不織布を挙げることができる。 Examples of the nonwoven fabric laminated with the nonwoven fabric of the present invention include other known nonwoven fabrics such as other spunbond nonwoven fabrics, melt blown nonwoven fabrics, wet nonwoven fabrics, dry nonwoven fabrics, dry pulp nonwoven fabrics, flash spun nonwoven fabrics, and spread nonwoven fabrics.
かかる不織布を構成する材料としては、種々公知の熱可塑性樹脂、例えば、エチレン、プロピレン、１−ブテン、１−ヘキセン、４−メチル−１−ペンテン及び１−オクテン等のα−オレフィンの単独若しくは共重合体である高圧法低密度ポリエチレン、線状低密度ポリエチレン（所謂ＬＬＤＰＥ）、高密度ポリエチレン、ポリプロピレン、ポリプロピレンランダム共重合体、ポリ１−ブテン、ポリ４−メチル−１−ペンテン、エチレン・プロピレンランダム共重合体、エチレン・１−ブテンランダム共重合体、プロピレン・１−ブテンランダム共重合体等のポリオレフィン、ポリエステル（ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート等）、ポリアミド（ナイロン−６、ナイロン−６６、ポリメタキシレンアジパミド等）、ポリ塩化ビニル、ポリイミド、エチレン・酢酸ビニル共重合体、ポリアクリロニトリル、ポリカーボネート、ポリスチレン、アイオノマー、熱可塑性ポリウレタンあるいはこれらの混合物等を例示することができる。これらのうちでは、高圧法低密度ポリエチレン、線状低密度ポリエチレン（所謂ＬＬＤＰＥ）、高密度ポリエチレン、ポリプロピレン、ポリプロピレンランダム共重合体、ポリエチレンテレフタレート、ポリアミド等が好ましい。 Examples of the material constituting such a nonwoven fabric include various known thermoplastic resins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene and other α-olefins. High pressure low density polyethylene, linear low density polyethylene (so-called LLDPE), high density polyethylene, polypropylene, polypropylene random copolymer, poly 1-butene, poly 4-methyl-1-pentene, ethylene / propylene random Polyolefin such as copolymer, ethylene / 1-butene random copolymer, propylene / 1-butene random copolymer, polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon- 66, polymer Xylene adipamide, etc.), polyvinyl chloride, polyimide, ethylene-vinyl acetate copolymer, polyacrylonitrile, polycarbonate can be exemplified polystyrene, ionomers, thermoplastic polyurethane, or mixtures thereof. Among these, high pressure method low density polyethylene, linear low density polyethylene (so-called LLDPE), high density polyethylene, polypropylene, polypropylene random copolymer, polyethylene terephthalate, polyamide and the like are preferable.
本発明の不織布と積層される他のスパンボンド不織布として、捲縮繊維より成る不織布を用いると、得られる積層体は、柔軟性、嵩高性、及び触感に優れる。また、熱可塑性樹脂及び熱可塑性エラストマーそれぞれの長繊維の混合繊維より成る不織布を延伸加工したものを用いると、得られる積層体は、前記特徴に加えて、伸縮性に優れる。 When a nonwoven fabric made of crimped fibers is used as another spunbond nonwoven fabric laminated with the nonwoven fabric of the present invention, the resulting laminate is excellent in flexibility, bulkiness, and touch. Moreover, when the thing which extended | stretched the nonwoven fabric which consists of a mixed fiber of each thermoplastic resin and a thermoplastic elastomer is used, in addition to the said characteristic, the laminated body obtained is excellent in a stretching property.
本発明の不織布を吸収性物品、例えば、使い捨ておむつのトップシート、セカンドシートあるいは吸収体を包むシート（コアラップ）に用いる場合は、繊度を０．５〜３デニール、目付を７〜３０ｇ／ｍ２の範囲とすることが好ましい。 When the nonwoven fabric of the present invention is used for an absorbent article, for example, a disposable diaper top sheet, a second sheet, or a sheet (core wrap) that wraps an absorbent body, the fineness is 0.5 to 3 denier and the basis weight is 7 to 30 g / m 2. It is preferable to set it as the range.
また、本発明の不織布を吸収性物品の吸収体を包むシート（コアラップ）に用いる場合は、前記メルトブロー不織布と積層して用いてもよい。 Moreover, when using the nonwoven fabric of this invention for the sheet | seat (core wrap) which wraps the absorber of an absorbent article, you may laminate | stack with the said melt blown nonwoven fabric.
本発明の不織布と積層されるフィルムとしては、本発明の不織布の特徴である親水性を生かす、通気性（透湿性）フィルムが好ましい。かかる通気性フィルムとしては、種々公知の通気性フィルム、例えば、透湿性を有するポリウレタン系エラストマー、ポリエステル系エラストマー、ポリアミド系エラストマー等の熱可塑性エラストマーからなるフィルム、無機あるいは有機微粒子を含む熱可塑性樹脂からなるフィルムを延伸して多孔化してなる多孔フィルム等を挙げることができる。多孔フィルムに用いる熱可塑性樹脂としては、高圧法低密度ポリエチレン、線状低密度ポリエチレン（所謂ＬＬＤＰＥ）、高密度ポリエチレン、ポリプロピレン、ポリプロピレンランダム共重合体あるいはそれらの組成物等のポリオレフィンが好ましい。 The film laminated with the nonwoven fabric of the present invention is preferably a breathable (moisture permeable) film that takes advantage of the hydrophilicity that is characteristic of the nonwoven fabric of the present invention. Examples of such a breathable film include various known breathable films, for example, films made of thermoplastic elastomers such as moisture-permeable polyurethane elastomers, polyester elastomers, polyamide elastomers, and thermoplastic resins containing inorganic or organic fine particles. Examples thereof include a porous film formed by stretching a film to be porous. The thermoplastic resin used for the porous film is preferably a polyolefin such as high-pressure method low-density polyethylene, linear low-density polyethylene (so-called LLDPE), high-density polyethylene, polypropylene, polypropylene random copolymer, or a composition thereof.
本発明の不織布は、本発明の目的を損なわない範囲で、ギア加工、印刷、塗布、ラミネート、熱処理、賦型加工などの二次加工を施して用いてもよい。 The non-woven fabric of the present invention may be used after being subjected to secondary processing such as gear processing, printing, coating, laminating, heat treatment, and shaping, as long as the object of the present invention is not impaired.
＜不織布の製造方法＞
不織布の原料として短繊維を用いる場合は、種々公知の製造方法、例えば、湿式法あるいは乾式法（カード）により製造し得る。
<Nonwoven Fabric Manufacturing Method>
When short fibers are used as the raw material for the nonwoven fabric, they can be produced by various known production methods, for example, a wet method or a dry method (card).
＜長繊維不織布の製造方法＞
本発明の長繊維不織布は、種々公知の不織布の製造方法により製造し得るが、スパンボンド法により製造する方法が、生産性に優れる点で好ましい。
<Method for producing long-fiber nonwoven fabric>
The long-fiber nonwoven fabric of the present invention can be produced by various known methods for producing nonwoven fabrics, but the method produced by the spunbond method is preferred in terms of excellent productivity.
本発明の長繊維不織布をスパンボンド法により製造する場合は、オレフィン系重合体組成物の単繊維からなるスパンボンド不織布を製造する場合は１つの押出機で１８０〜２５０℃、好ましくは１９０〜２３０℃で溶融し、紡糸ノズルを有する１８０〜２５０℃、好ましくは１９０〜２３０℃に設定した紡糸口金から０．４〜１．５ g/分、好ましく０．５〜０．８g/分の単孔吐出量で吐出させて、繊維を紡出し、紡出した繊維を１０〜４０℃、好ましくは２０〜４０℃の冷却用エアにより冷却するとともに、２０００〜７０００ｍ／分、好ましく３０００〜６０００ｍ／分の高速エアにより繊維を牽引細化して所定の繊度とし、捕集ベルト上に捕集して所定の厚さ（目付）に堆積させた後、ニードルパンチ、ウォータージェット、超音波等の手段を用いる方法、あるいはエンボスロールを用いる熱エンボス加工またはホットエアースルーを用いることにより一部熱融着する方法等の交絡方法で交絡することにより製造し得る。 When producing the long-fiber nonwoven fabric of the present invention by the spunbond method, when producing a spunbond nonwoven fabric comprising single fibers of the olefin polymer composition, 180 to 250 ° C, preferably 190 to 230, with one extruder. Single hole from a spinneret melted at ℃ and having a spinning nozzle set at 180-250 ℃, preferably 190-230 ℃, 0.4-1.5 g / min, preferably 0.5-0.8 g / min The fibers are spun at a discharge amount to spin the fibers, and the spun fibers are cooled by cooling air at 10 to 40 ° C., preferably 20 to 40 ° C., and 2000 to 7000 m / min, preferably 3000 to 6000 m / min. The fiber is pulled and thinned by high-speed air to a predetermined fineness, collected on a collection belt and deposited to a predetermined thickness (weight), then needle punch, water jet, ultrasonic wave, etc. The method using a stepped or may be prepared by entangling by entangling method and a method of thermal fusion portion by using a heat embossing or hot air-through using an embossing roll.
＜吸収性物品＞
本発明の吸収性物品は、前記不織布、好ましくは長繊維不織布をトップシート及び／又はセカンドシート、あるいは吸収体を包むシート（コアラップ）に用いてなる吸収性物品である。本発明の吸収性物品は、使い捨ておむつ、パンツあるいは生理用品、尿取りパッド、ペット用シートなどを含む。
<Absorbent article>
The absorbent article of the present invention is an absorbent article formed by using the nonwoven fabric, preferably a long fiber nonwoven fabric, as a top sheet and / or a second sheet, or a sheet (core wrap) that wraps an absorbent body. The absorbent article of the present invention includes disposable diapers, pants or sanitary products, urine collection pads, pet sheets and the like.
とくに、使い捨ておむつのトップシート、セカンドシートあるいは吸収体を包むシート（コアラップ）に用いる場合、オレフィン系重合体組成物の繊維からなる不織布を用いる場合は、オレフィン系重合体１００重量部に対して、ポリアルキレングリコールのジ飽和脂肪酸エステルを、０．７〜３重量部の範囲とすることが好ましい。 In particular, when using a disposable diaper top sheet, a second sheet or a sheet (core wrap) that wraps the absorbent body, when using a nonwoven fabric made of fibers of an olefin polymer composition, 100 parts by weight of the olefin polymer, The disaturated fatty acid ester of polyalkylene glycol is preferably in the range of 0.7 to 3 parts by weight.
以下、実施例に基づいて本発明をさらに具体的に説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated further more concretely based on an Example, this invention is not limited to these Examples.
なお、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。また、以下
（１）親水性の測定では、人工尿として、表面張力が７０＋／−２ｍＮ／ｍ塩化ナトリウムの水溶液（９ｇ／リットル）を用いた。
In addition, the physical-property value in an Example and a comparative example was measured with the following method. In the following (1) hydrophilicity measurement, an aqueous solution (9 g / liter) having a surface tension of 70 +/− 2 mN / m sodium chloride was used as artificial urine.
また、（１）親水性の測定は、不織布を製造してから２４時間経過後４８時間以内（加熱処理なし）、及び不織布を製造してから２４時間以上経過した不織布を設定温度８０℃で２時間加熱処理した後取り出して２時間以内（加熱処理あり）の２条件で測定した。
（１）親水性
不織布より試料（５０ｍｍ×２００ｍｍ）を採取した。４５度に傾斜させて固定した板上に、アドバンテック社製Ｎｏ．２濾紙を５枚重ねて置き、その上に試料を置いて、試料の長手方向の両端を前記濾紙と一緒に板上に固定した。試料面より約１０ｍｍの高さから5mlガラスピペットにて人工尿を１滴（約０．３ｍｌ）落下させ、液滴の吸収状態を以下の基準で評価した。
In addition, (1) hydrophilicity measurement is performed at a set temperature of 80 ° C. within 48 hours (no heat treatment) after 24 hours from the production of the nonwoven fabric and at a set temperature of 80 ° C. After the heat treatment for a time, the sample was taken out and measured under two conditions within 2 hours (with heat treatment).
(1) Hydrophilic A sample (50 mm × 200 mm) was collected from the nonwoven fabric. No. made by Advantech Co., Ltd. on a plate fixed at an angle of 45 degrees. Two pieces of two filter papers were placed on top of each other, a sample was placed thereon, and both ends in the longitudinal direction of the sample were fixed on the plate together with the filter paper. One drop (about 0.3 ml) of artificial urine was dropped from a height of about 10 mm from the sample surface with a 5 ml glass pipette, and the absorption state of the drops was evaluated according to the following criteria.
○：液滴落下後、1秒以内に試料下部に吸収される
△：液滴落下後、1秒を超え1分以内に試料下部に吸収される
×：液滴落下後、1分を超えても試料下部に吸収されない（液滴が表面を転がり落ちる）
（２）押出性能
親水剤マスターバッチを混合した原料を２００℃に設定した押出機に投入し、その際の押出状態を以下の基準に基づき評価した。
○: Absorbed at the bottom of the sample within 1 second after the drop is dropped △: Absorbed at the bottom of the sample within 1 minute after the drop is dropped ×: Over 1 minute after the drop is dropped Is not absorbed in the lower part of the sample (droplet rolls down the surface)
(2) Extrusion performance The raw material mixed with the hydrophilic master batch was put into an extruder set at 200 ° C, and the extrusion state at that time was evaluated based on the following criteria.
○：スクリューの回転と共に溶融材料が押出される。 ○: The molten material is extruded with the rotation of the screw.
×：スクリューを回転させても溶融材料が押出されず、押出機内でスリップする
（３）発煙性
スパンボンド法により２００℃にて溶融した材料を紡糸した際のノズル部からの発煙状態を以下の基準に基づき評価した。
X: The molten material is not extruded even when the screw is rotated, and slips in the extruder. (3) Smokeability The smoke generation state from the nozzle part when spinning the material melted at 200 ° C. by the spunbond method is as follows. Evaluation was based on criteria.
○：親水剤を練り込みしない状態とほぼ同等の発煙状態
×：発煙が著しく認められる、または認められないが8時間以内に停止し、紡糸部に付着した発煙成分を清掃する必要がある状態
（４）目付け（ｇ／ｍ2）
不織布の任意の位置から１００ｍｍ×１００ｍｍの試料を１０枚採取し、それぞれの質量（ｇ）を測定した。それらの平均値を求め、１ｍ2当りの質量に換算して目付け（ｇ／ｍ2）とした。
（５）水中への溶出
不織布の任意の位置から１００ｍｍ×１００ｍｍの試料を１枚採取し、１０ｍｌの人工尿中に８時間室温にて浸漬した。浸漬後の溶液に白濁が認められるかどうか、親水剤を含まない不織布をブランクとして比較観察し、以下の基準に基づき評価した。
○: Smoke state almost equivalent to the state where the hydrophilic agent is not kneaded ×: Smoke is remarkably recognized or not observed, but it must be stopped within 8 hours and the smoke component adhering to the spinning part needs to be cleaned ( 4) Fabric weight (g / m 2 )
Ten samples of 100 mm × 100 mm were taken from an arbitrary position of the nonwoven fabric, and each mass (g) was measured. Their average values were obtained and converted to mass per 1 m 2 to obtain basis weight (g / m 2 ).
(5) Elution into water One sample of 100 mm × 100 mm was collected from an arbitrary position of the nonwoven fabric and immersed in 10 ml of artificial urine at room temperature for 8 hours. Whether the clouded solution was recognized as a solution after immersion, a non-woven fabric containing no hydrophilic agent was comparatively observed as a blank and evaluated based on the following criteria.
○：白濁が認められない
×：白濁が認められる
[実施例１]
平均分子量６００のポリエチレングリコールのジミリスチン酸エステル（Ｒ＝ＣＨ3‐（ＣＨ2）12：ジエステル‐１）２０重量％、および融点（Ｔｍ）：１４２℃、ＭＦＲ：６０ｇ／１０分のプロピレン・エチレンランダム共重合体（ＰＰ−１）：８０重量％に酸化防止剤（Ｃｉｂａ社製、商品名Ｉｒｇａｆｏｓ １６８）を０．０５重量部加え、２３０℃で溶融混練して押出し、ペレット状のマスターバッチ（親水剤―１）を用意した。
○: No cloudiness is observed ×: Cloudiness is observed
[Example 1]
Polyethylene glycol dimyristic acid ester (R = CH 3- (CH 2 ) 12 : diester-1) 20% by weight with an average molecular weight of 600, and a melting point (Tm): 142 ° C., MFR: 60 g / 10 min. Random copolymer (PP-1): Add 80 parts by weight of an antioxidant (Ciba, trade name Irgafos 168) to 80% by weight, melt knead and extrude at 230 ° C., pellet master batch ( Hydrophilic agent-1) was prepared.
次いで、融点（Ｔｍ）：１４２℃、ＭＦＲ：６０ｇ／１０分のプロピレン・エチレンラ
ンダム共重合体（ＰＰ−１）９０重量部に対して、前記親水剤−１を１０重量部加えて混合してプロピレン重合体組成物（組成物−１）を得た。
Next, 10 parts by weight of the hydrophilic agent-1 was added to and mixed with 90 parts by weight of a propylene / ethylene random copolymer (PP-1) having a melting point (Tm): 142 ° C. and an MFR: 60 g / 10 min. A propylene polymer composition (Composition-1) was obtained.
押出性能を評価するために、組成物‐１を、単軸押出機（スクリュー径３０ｍｍ、Ｌ／Ｄ＝３０）に投入し、押出量４．４ｋｇ／ｈｒ、樹脂温度２００℃にて加熱溶融させたところ、押出機スクリューへの組成物−１の食込み状態は親水剤を加えない時と同様で良好（○）であった。 In order to evaluate the extrusion performance, the composition-1 was put into a single screw extruder (screw diameter 30 mm, L / D = 30) and melted by heating at an extrusion rate of 4.4 kg / hr and a resin temperature of 200 ° C. As a result, the biting state of Composition-1 into the extruder screw was good (◯) as in the case where the hydrophilic agent was not added.
次いで、組成物‐１を用いて、スパンボンド法により溶融紡糸し、長繊維を得た。このとき、紡糸ノズル出口より、親水剤−１に由来する白煙はほとんど認められず添加しなかった場合と差がなかった。紡糸に続いて、熱エンボス加工を行い、目付けが２０ｇ／ｍ２の長繊維不織布を得た。次いで、刻印形状が菱形、エンボス面積率が１８％、エンボス面積（刻印一つ当たりの面積）が０．４１ｍｍ２のエンボスロールを用いて、エンボスロールおよび平滑ロールの温度を１２５℃、線圧力を６０Ｎ／ｍｍとして、熱エンボス加工した。長繊維不織布を製造してから２４時間経過後、４８時間以内に親水性を測定した（熱処理なし）。また、製造してから２４時間以上経過した長繊維不織布をオーブン（エスペック社製、タバイセイフティオーブン ＳＴＳ２２２）内の中央付近に吊り下げ、設定温度８０℃で２時間加熱処理した後、取り出して２時間以内に同様の測定を行った（加熱処理あり）。 Subsequently, the composition-1 was melt-spun by a spunbond method to obtain long fibers. At this time, white smoke derived from the hydrophilic agent-1 was hardly recognized from the spinning nozzle outlet, and there was no difference from the case where it was not added. Subsequent to spinning, hot embossing was performed to obtain a long fiber nonwoven fabric having a basis weight of 20 g / m 2 . Next, using an embossing roll with an engraved shape of rhombus, an embossed area ratio of 18%, and an embossed area (area per imprinted) of 0.41 mm 2 , the temperature of the embossing roll and the smooth roll was 125 ° C., and the linear pressure was Heat embossing was performed at 60 N / mm. Hydrophilicity was measured within 48 hours after the lapse of 24 hours from the production of the long fiber nonwoven fabric (no heat treatment). In addition, a long-fiber non-woven fabric that has passed 24 hours or more after production is hung near the center in an oven (Espec Corp., Tabai Safety Oven STS222), heat-treated at a set temperature of 80 ° C. for 2 hours, and then taken out for 2 hours. The same measurement was performed within (with heat treatment).
得られた長繊維不織布の物性を、前記記載の方法で測定した。結果を表１に示す。 The physical properties of the obtained long fiber nonwoven fabric were measured by the method described above. The results are shown in Table 1.
［実施例２］
実施例１で用いたジエステル‐１に替えて、平均分子量８００のポリエチレングリコールのジミリスチン酸エステル（ジエステル‐２）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表１に示す。
[Example 2]
A long fiber nonwoven fabric was obtained in the same manner as in Example 1 except that dimyristate ester (diester-2) of polyethylene glycol having an average molecular weight of 800 was used instead of diester-1 used in Example 1. The physical properties and results of the obtained long fiber nonwoven fabric are shown in Table 1.
［実施例３］
実施例１で用いたジエステル‐１に替えて、平均分子量６００のポリエチレングリコールのジステアリン酸エステル（Ｒ＝ＣＨ3‐（ＣＨ2）16、ジエステル‐３）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表１に示す。
[Example 3]
The same procedure as in Example 1 was carried out except that diester-1 of polyethylene glycol having an average molecular weight of 600 (R = CH 3- (CH 2 ) 16 , diester-3) was used instead of diester-1 used in Example 1. A long fiber nonwoven fabric was obtained. The physical properties and results of the obtained long fiber nonwoven fabric are shown in Table 1.
［参考例４］
実施例１で用いたＰＰ−１に替えて、融点（Ｔｍ）：１６０℃、ＭＦＲ：６０ｇ／１０分のプロピレン単独重合体（ＰＰ−２）を用いる以外は実施例３と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表１に示す。
[ Reference Example 4]
The same procedure as in Example 3 except that a propylene homopolymer (PP-2) having a melting point (Tm) of 160 ° C. and an MFR of 60 g / 10 min was used instead of PP-1 used in Example 1, and the long fiber. A nonwoven fabric was obtained. The physical properties and results of the obtained long fiber nonwoven fabric are shown in Table 1.
［比較例１］
実施例１で用いたジエステル‐１に替えて、平均分子量２００のポリエチレングリコールのジミリスチン酸エステル（ジエステル‐４）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表２に示す。
[Comparative Example 1]
A long fiber nonwoven fabric was obtained in the same manner as in Example 1 except that dimyristic acid ester (diester-4) of polyethylene glycol having an average molecular weight of 200 was used instead of diester-1 used in Example 1. The physical properties and results of the obtained long fiber nonwoven fabric are shown in Table 2.
［比較例２］
実施例１で用いたジエステル‐１に替えて、平均分子量４００のポリエチレングリコールのジミリスチン酸エステル（ジエステル‐５）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表２に示す。
[Comparative Example 2]
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that dimyristic acid ester (diester-5) of polyethylene glycol having an average molecular weight of 400 was used instead of diester-1 used in Example 1. The physical properties and results of the obtained long fiber nonwoven fabric are shown in Table 2.
［比較例３］
実施例１で用いたジエステル‐１に替えて、平均分子量１０００のポリエチレングリコールのジミリスチン酸エステル（ジエステル‐６）を用いて、長繊維不織布の製造を試みたが、押出機のスクリューを回転させても、溶融材料が押出されず、押出機内でプロピレン重合体組成物がスリップし、長繊維不織布を得ることができなかった。
[Comparative Example 3]
An attempt was made to produce a long-fiber nonwoven fabric using dimyristic acid ester (diester-6) of polyethylene glycol having an average molecular weight of 1000 instead of diester-1 used in Example 1, but the screw of the extruder was rotated. However, the molten material was not extruded, the propylene polymer composition slipped in the extruder, and a long fiber nonwoven fabric could not be obtained.
［比較例４］
実施例１で用いたジエステル‐１に替えて、平均分子量１０００のポリエチレングリコールのジステアリン酸エステル（ジエステル‐７）を用いて、長繊維不織布の製造を試みたが、押出機のスクリューを回転させても、溶融材料が押出されず、押出機内でプロピレン重合体組成物がスリップし、長繊維不織布を得ることができなかった。
[Comparative Example 4]
In place of the diester-1 used in Example 1, an attempt was made to produce a long-fiber nonwoven fabric using a distearic acid ester (diester-7) of polyethylene glycol having an average molecular weight of 1000, but the screw of the extruder was rotated. However, the molten material was not extruded, the propylene polymer composition slipped in the extruder, and a long fiber nonwoven fabric could not be obtained.
［比較例５］
実施例１で用いたジエステル‐１に替えて、平均分子量６００のポリエチレングリコールのジミリストレイン酸エステル（Ｒ＝ＣＨ3−（ＣＨ2）3ＣＨ＝ＣＨ（ＣＨ2）7：ジエステル‐８）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表３に示す。
[Comparative Example 5]
Instead of diester -1 used in Example 1, dimyristoyl maleic acid esters of polyethylene glycol having an average molecular weight 600 (R = CH 3 - ( CH 2) 3 CH = CH (CH 2) 7: diester -8) the A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that it was used. Table 3 shows the physical properties and results of the obtained long fiber nonwoven fabric.
［比較例６］
実施例１で用いたジエステル‐１に替えて、平均分子量４００のポリエチレングリコールのジラウリン酸エステル（Ｒ＝ＣＨ3‐（ＣＨ2）10：ジエステル‐９）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表３に示す。
[Comparative Example 6]
The same procedure as in Example 1 was carried out except that diester-1 used in Example 1 was replaced with polyethylene glycol dilaurate (R = CH 3- (CH 2 ) 10 : diester-9) having an average molecular weight of 400. A long fiber nonwoven fabric was obtained. Table 3 shows the physical properties and results of the obtained long fiber nonwoven fabric.
［比較例７］
実施例１で用いたジエステル‐１に替えて、平均分子量４００のポリエチレングリコールのジオレイン酸エステル（Ｒ＝ＣＨ3−（ＣＨ2）7ＣＨ＝ＣＨ（ＣＨ2）7：ジエステル‐１０）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表３に示す。
[Comparative Example 7]
Instead of diester -1 used in Example 1, dioleate ester of polyethylene glycol having an average molecular weight 400 (R = CH 3 - ( CH 2) 7 CH = CH (CH 2) 7: diester -10) but using Was carried out in the same manner as in Example 1 to obtain a long fiber nonwoven fabric. Table 3 shows the physical properties and results of the obtained long fiber nonwoven fabric.
［比較例８］
実施例１で用いたジエステル‐１に替えて、平均分子量４００のポリエチレングリコールのモノラウリン酸エステル（モノエステル‐１）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表３に示す。
[Comparative Example 8]
A long fiber nonwoven fabric was obtained in the same manner as in Example 1 except that polyethylene glycol monolaurate (monoester-1) having an average molecular weight of 400 was used instead of diester-1 used in Example 1. Table 3 shows the physical properties and results of the obtained long fiber nonwoven fabric.
［比較例９］
実施例１で用いたジエステル‐１に替えて、平均分子量８００のポリエチレングリコールのモノミリスチン酸エステル（モノエステル‐２）を用いる以外は実施例１と同様に行い長繊維不織布を得た。得られた長繊維不織布の物性および結果を表３に示す。
[Comparative Example 9]
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that monomyristic acid ester (monoester-2) of polyethylene glycol having an average molecular weight of 800 was used instead of diester-1 used in Example 1. Table 3 shows the physical properties and results of the obtained long fiber nonwoven fabric.
本発明の繊維及び当該繊維を含む不織布は、繊維を紡糸する際の発煙が抑制され、しかも、得られる繊維および不織布は、優れた初期親水性および耐久親水性を示し、衛生材料として、幅広い用途に、好適に用いることができる。 The fiber of the present invention and the nonwoven fabric containing the fiber are prevented from producing smoke when the fiber is spun, and the obtained fiber and nonwoven fabric exhibit excellent initial hydrophilicity and durable hydrophilicity, and are widely used as sanitary materials. It can be preferably used.
Claims (7)
Ｒ−ＣＯＯ−（ＣnＨ2nＯ）x−ＣＯ−Ｒ 式（１）
［式中、Ｒは炭素数が１３〜１７のアルキル基であり、（ＣnＨ2nＯ）xのｎは２〜４の整数であり、ｘは１０〜２３である。） With respect to 100 parts by weight of a propylene / α-olefin random copolymer having a melting point (Tm) in the range of 125 to 155 ° C. , 0.5% of a disaturated fatty acid ester of polyalkylene glycol represented by the following chemical formula (1 ) is added. A fiber comprising an olefin polymer composition containing ˜5 parts by weight.
R-COO- (C n H 2n O) x -CO-R expression (1)
[Wherein, R is an alkyl group having 13 to 17 carbon atoms, n in (C n H 2n O) x is an integer of 2 to 4, and x is 10 to 23. )
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