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Telescopic nonwoven fabric

A non-woven, stretchable technology, used in non-woven fabrics, textiles and papermaking, one-component polyolefin rayon, etc., can solve the problems of low modulus, insufficient hysteresis of expansion and contraction, etc.

Inactive Publication Date: 2007-11-21
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of nonwoven fabric has a low modulus (modulus), and the hysteresis of expansion and contraction (hysteresis) is not sufficient.

Method used

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  • Telescopic nonwoven fabric
  • Telescopic nonwoven fabric
  • Telescopic nonwoven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0136] This embodiment is an embodiment of the first invention. Stretchable nonwoven fabrics were manufactured using the apparatus shown in Fig. 1 . First, an elastic web is formed as follows. As the block copolymer, SEPTON (registered trademark) 2004, a styrene-ethylene-propylene-styrene block copolymer manufactured by Kuraray Corporation, was used. The block copolymer contained 18% by weight of styrene as polymeric block A and 82% by weight of ethylene-propylene as polymeric block B. The dynamic viscoelasticity measurement of this block copolymer was carried out, and the elastic storage modulus at 20°C and 2Hz was 1.9×10 5 Pa, the dynamic loss tangent value tanδ is 0.02. In addition, a polypropylene resin (homopolymerization) having an MFR of 60 g / 10 min was used as a different resin for inelastic fibers. An elastic fiber web composed of mixed fibers of two kinds of resins is formed using the above-mentioned resins. Two extruders are used to form the fiber web, each res...

Embodiment 1-2

[0140] This embodiment is an embodiment of the first invention. As the block copolymer, SEPTON (registered trademark) 2002, a styrene-ethylene-propylene-styrene block copolymer manufactured by Kuraray Corporation, was used. The block copolymer contained 30% by weight of styrene as polymer block A and 70% by weight of ethylene-propylene as polymer block B. The dynamic viscoelasticity measurement of this block copolymer was carried out, and the elastic storage modulus at 20°C and 2Hz was 3.0×10 5 Pa, the dynamic loss tangent value tanδ is 0.03. Except for this, a stretchable nonwoven fabric was obtained in the same manner as in Example 1-1.

Embodiment 2-1

[0155] This embodiment is an embodiment of the second invention. The elastic web was formed as follows. As the resin used for the elastic fibers, SEBS having a melt viscosity of 300 Pa·s at 230° C. and a melt tension of 1.3 cN was used. In addition, a polypropylene resin (homopolymerization) having an MFR of 60 g / 10 min (230° C., 2.16 kg) was used as a different resin for other inelastic fibers. An elastic fiber web composed of mixed fibers of two kinds of resins is formed using the above-mentioned resins. The formation of the fiber web 1 uses two extruders, each resin is melted at a die temperature of 290°C with each extruder, and extruded from the spinning nozzle, and the fiber is formed on the web by the spinning and blowing method. accumulation. As shown in FIG. 6, the spinning nozzle has a shape in which each resin is extruded alternately. The weight ratio of SEBS and polypropylene was set at 50 / 50. The fiber diameter of the elastic fibers was 25 μm. The fiber diame...

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Abstract

The invention discloses a Telescopic nonwoven fabric comprises elastic fiber and other elastic fiber or inelastic fiber which is different from the elastic fiber before, the block polymer comprises polymer block A whose main part is aromatic series vinyl-compounds with 10-50 weight % and polymer block B whose main part is the repeated unit in type (1). In the condition of 20 DEG C and 2 Hz, the elasticity storage modulus G' of the dynamic viscoelasticity is 1*104-8*106Pa, and the dynamic loss tangent of the dynamic viscoelasticity tan Delta is below 0.2. In type (1), random one or two in R1-R4 are methyl, the others are hydrogen atom.

Description

technical field [0001] The present invention relates to stretchable nonwoven fabrics. Background technique [0002] Various stretchable nonwoven fabrics containing elastic fibers made of elastomer resins are known. For example, Japanese Patent Application Laid-Open No. 62-84143 describes an elastomeric nonwoven fabric comprising microfibers composed of extrudable polyolefins containing at least about 10% by weight of A-B-A block copolymers and polyolefins. Formed elastomeric composition. However, since the above-mentioned microfibers contain polyolefin as their constituent resin, stretching properties are not sufficient due to this. [0003] JP-A-5-272043 describes a composite elastic material having an anisotropic elastic fiber web and a gatherable layer combined with the fiber web, wherein the anisotropic elastic fiber web has Layers of elastomeric meltblown fibers and layers of elastomeric filaments. The materials constituting the elastomeric filaments are 40-80% by w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D04H1/40D04H3/14D04H5/00D01F6/22D01F6/04D01F6/42D01F6/56D04H1/4374D04H1/544
Inventor 小平博志舛木哲也宫村猛史小林秀行金泽幸二
Owner KAO CORP
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