Mixed fiber and, stretch nonwoven fabric comprising said mixed fiber and method for manufacture thereof

A technology of non-woven fabrics and mixtures, applied in the field of elastic non-woven fabrics and sanitary materials, can solve the problems of filament breakage, spinnability (poor formability, etc.)

Active Publication Date: 2006-03-01
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The inventors of the present invention conducted earnest research in order to overcome the above-mentioned problems, and completed the present invention based on the finding that the problems related to "stickiness" can be solved using a thermoplastic polyurethane elastomer having a specific freezing point and a specific content of polar solvent insoluble matter, Such as poor spinnability (formability) and filament breakage, the use of this polyurethane elastomer also makes non-woven fabrics exhibit excellent hand feeling and high elasticity

Method used

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  • Mixed fiber and, stretch nonwoven fabric comprising said mixed fiber and method for manufacture thereof
  • Mixed fiber and, stretch nonwoven fabric comprising said mixed fiber and method for manufacture thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0174]In a nitrogen atmosphere, 280.3 parts by weight of 4,4'-diphenylmethane diisocyanate (hereinafter "MDI") (trade name: Cosmonate PH, available from Mitsui Takeda Chemicals, Inc.) was placed in an isocyanate compound storage tank (hereinafter Referred to as "tank A"), heat to 45°C with agitation to avoid air bubbles.

[0175] Separately, under a nitrogen atmosphere, in a polyol storage tank (hereinafter referred to as "tank B") was charged:

[0176] 219.8 parts by weight of polyester polyol having a number average molecular weight of 1000 (trade name: Takelac U2410, available from Mitsui Takeda Chemicals, Inc.);

[0177] 439.7 parts by weight of polyester polyol having a number average molecular weight of 2000 (trade name: Takelac U2420, available from Mitsui Takeda Chemicals, Inc.);

[0178] 2.97 parts by weight of bis(2,6-diisopropylphenyl)carbodiimide (trade name: Stabilizer 7000, available from RASCHIG GmbH);

[0179] 2.22 parts by weight of hindered phenolic antioxi...

Embodiment 2

[0188] In a nitrogen atmosphere, 288.66 parts by weight of MDI were introduced into tank A, heated to 45°C and agitated to avoid air bubbles.

[0189] Separately, under a nitrogen atmosphere, tank B was charged with:

[0190] 216.2 parts by weight of polytetramethylene ether glycol (trade name: PTG-1000, available from Hodogaya Chemicals) with a number average molecular weight of 1000;

[0191] 432.5 parts by weight of polyester polyol having a number average molecular weight of 2000 (trade name: Takelac U2720, available from Mitsui Takeda Chemicals, Inc.);

[0192] 2.22 parts by weight of Irganox 1010; and

[0193] 2.22 parts by weight of JF-83.

[0194] The contents were heated to 95°C with agitation. This mixture is referred to as polyol solution 2.

[0195] Next, 62.7 parts by weight of a chain extender 1,4-butanediol was introduced into tank C under a nitrogen atmosphere and heated to 50°C.

[0196] From the amount of these materials the amount of hard segments can b...

Embodiment 3

[0201] Under a nitrogen atmosphere, place the MDI in Tank A, heat to 45°C and agitate to avoid air bubbles.

[0202] Separately, under a nitrogen atmosphere, tank B was charged with:

[0203] 628.6 parts by weight of polyester polyol having a number average molecular weight of 2000 (trade name: Takelac U2024, available from Mitsui Takeda Chemicals, Inc.);

[0204] 2.21 parts by weight of Irganox 1010; and

[0205] 77.5 parts by weight of 1,4-butanediol.

[0206] The contents were heated to 95°C with agitation. This mixture is referred to as polyol solution 3.

[0207] From the amount of these materials the amount of hard segments can be estimated to be 37.1% by weight.

[0208] Thereafter, MDI and polyol solution 3 were supplied at constant flow rates of 17.6 kg / h and 42.4 kg / h, respectively, into a high-speed stirrer (Model SM40) whose temperature was controlled at 120 °C through the liquid supply line with a gear pump and a flow meter. . After mixing them by stirring a...

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Abstract

A fiber mixture according to the invention comprises fibers A comprising a polymer A containing a thermoplastic polyurethane elastomer and fibers B comprising a thermoplastic polymer B other than the thermoplastic polyurethane elastomer, said thermoplastic polyurethane elastomer having a solidifying point of 65 DEG C or above as measured by a differential scanning calorimeter (DSC) and containing 3.00x10<6> or less polar-solvent-insoluble particles per g counted on a particle size distribution analyzer, which is based on an electrical sensing zone method, equipped with an aperture tube having an orifice of 100 mu m in diameter. An elastic nonwoven fabric comprises the fiber mixture.

Description

technical field [0001] The invention relates to a fiber mixture comprising fibers A comprising a polymer comprising a thermoplastic polyurethane elastomer and fibers B comprising a different thermoplastic polymer. The invention also relates to an elastic nonwoven comprising such a fiber mixture and a method for the production of the nonwoven. Furthermore, the present invention relates to a laminate comprising the elastic nonwoven fabric and a hygienic material comprising the elastic nonwoven fabric. Background technique [0002] Elastic nonwoven fabrics made of thermoplastic polyurethane elastomer (hereinafter referred to as "TPU") proposed so far have been used in several applications due to their high elasticity, low residual strain, and excellent air permeability, including Clothing, sanitary materials and materials for sporting goods. [0003] JP-A-2002-522653 proposes that the characteristic "sticky feel" characteristic of thermoplastic elastomers is one of the proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/00D04H3/005D04H3/153D04H3/16
Inventor 铃木健一本村茂之山崎聪西口大介川那部恒
Owner MITSUI CHEM INC
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