Non-woven fabric and laminate and string using the same

A technology of non-woven fabrics and fabrics, applied in the direction of textile, fabric, textile and papermaking, can solve the problems of difficult thickness, thinning, deformation, etc., and achieve the effect of improving strength

Inactive Publication Date: 2004-07-14
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult to make the nonwoven fabric with a base fabric thinner due to the base fabric.
In addition, due to the base fabric, there is still a problem that uniform porosity, air permeability, and deformation during stretching cannot be obtained.
[0005] Furthermore, the above-mentioned conventional chemi

Method used

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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  • Non-woven fabric and laminate and string using the same
  • Non-woven fabric and laminate and string using the same
  • Non-woven fabric and laminate and string using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0055] figure 1 The nonwoven fabric 1 according to the first embodiment of the present invention is shown.

[0056] This non-woven fabric 1 is mainly made of semi-fired PTFE fibers, which have a branched structure.

[0057] The fluororesin in this embodiment uses PTFE, but this PTFE can be either a separate polymer of tetrafluoroethylene (hereinafter referred to as TFE), or a small amount of perfluoroalkyl vinyl ester, etc. have been polymerized in TPE and undergo denaturation treatment. Denatured PTFE. In addition, in the present invention, unless otherwise specified, denatured PTFE is also referred to as PTFE.

[0058] In addition, copolymers of TFE and hexafluoropropylene (FEP), copolymers of ethylene and TFE (ETFE), copolymers of TFE and perfluoroalkyl vinyl ester (hereinafter referred to as PFA), etc., which can be melt-processed, can also be used. Resin to replace PTFE. These fluororesins may be used alone or in combination of two or more. These fluororesins have ex...

no. 2 Embodiment

[0096] The nonwoven fabric of the second embodiment of the present invention is the same as the nonwoven fabric of the first embodiment except that the resin of a part of the fluororesin fibers has welded points.

[0097] In the nonwoven fabric of the present embodiment, in the nonwoven fabric of the first embodiment, the temperature of at least a part of the fluororesin fibers in the nonwoven fabric is treated with pressure and heat at a temperature above its melting point. and obtained. However, when this temperature is too high, the fluororesin is excessively decomposed. For example, in the case of semi-fired PTFE, it is appropriate to treat at a temperature of 340°C to 360°C. Furthermore, in such a nonwoven fabric, it is preferable to heat only one side from the viewpoint of suppressing a change in the width of the nonwoven fabric due to heat shrinkage.

[0098] Specifically, for example, the nonwoven fabric can be passed between a metal roll heated to 340° C. to 360° C....

Embodiment 3

[0173] Embodiment 3 [rope]

[0174] With the width 8mm that obtains with specific example 2, the stretched workpiece of thickness 0.4mm, carry out the twist processing of length direction 1 turn / cm, process into about 1.3mm in outer diameter, the rope-like thing of total length about 400mm.

[0175] The strength obtained with this processing is as follows.

[0176] Tensile strength before twisting processing (test piece width 8mm, thickness 0.4mm)

[0177] Maximum point load: 30N, maximum point elongation 22%

[0178]Tensile strength after twisting processing (outer diameter of test piece is about 1.3mm)

[0179] Maximum point load: 60N, maximum point elongation 25%

[0180] By twisting the strip-like body, a rope-like body having a large tensile strength per unit weight is obtained.

[0181] In addition, this kind of rope can also be processed by firing, and the looseness of fibers can be improved by firing, so that a rope with high tensile strength can be obtained.

[0...

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Abstract

A non-woven fabric of the present invention is composed primarily of entangled fluoropolymer fibers. In addition, the non-woven fabric of the present invention may be pressure and heat treated, or may be subject to elongation. This provides the non-woven fabric with superior mechanical characteristics.

Description

technical field [0001] The present invention relates to nonwoven fabrics (nonwoven fabrics) mainly composed of fluororesin fibers, and laminates and tapes using such nonwoven fabrics. Background technique [0002] Fluoroplastics have excellent properties such as high chemical resistance, high heat resistance, high insulation, and an extremely low coefficient of friction. Also, precisely because of such an extremely low coefficient of friction, it is difficult to obtain a nonwoven fabric of fluororesin fibers having high mechanical strength. In particular, short fluororesin fibers cannot be used to produce nonwoven fabrics. [0003] Therefore, conventionally, when there is a requirement for mechanical strength, for example, a fluororesin fiber nonwoven fabric having a backing layer in which rayon fibers interlaced with fluororesin are laminated has been used. As such a fluororesin nonwoven fabric using a base fabric, there is known a product in which fluororesin fibers inte...

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): D04H1/4318D04H1/49D04H1/492D04H13/00
CPCD04H13/003D04H13/007D04H1/54D04H1/42D04H1/465D04H1/4318D04H1/4374D04H1/49D04H1/43835Y10T442/637Y10T442/689Y10T442/696Y10T442/697
Inventor 山本诚吾山本胜年浅野纯茶圆伸一小西智久
Owner DAIKIN IND LTD
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