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fire retardant knitted fabric

A fire-retardant technology for knitted fabrics, which is applied in knitting, weft knitting, warp knitting, etc., and can solve the problem that phosphorus-based chemicals are not as good as flame-retardant effects

Active Publication Date: 2021-04-23
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phosphorus-based chemicals may not have the same flame-retardant effect as conventional halogen-based chemicals

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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  • fire retardant knitted fabric
  • fire retardant knitted fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] (spinning)

[0103] The stretched yarn and refractory yarn of PPS fiber are mixed through an opener, then further mixed through an opener and a cleaner, and then passed through a carding machine to make a sliver. The weight of the resulting sliver was 320 grains / 6 yards (1 grain = 1 / 7000 lb) (20.74 g / 5.46 m). Then the total draft is set to 8 times and stretched with a sliver machine to make a sliver of 280 grains / 6 yards (18.14g / 5.46m). Then twist and draw to 7.9 times with 0.55T / 2.54cm twisting with roving frame, obtained the roving of 230 grains / 6 yards (14.90g / 5.46m). Then twist with 16.4T / 2.54cm with spinning frame and stretch to 32 times of total draft and twist, and obtained the staple fiber yarn that is counted as 40 in cotton count. The weight ratio of stretched yarn and refractory yarn of PPS fiber of staple fiber yarn is 60:40. The staple fiber yarn had a tensile strength of 2.2 cN / dtex and a tensile elongation of 20%.

[0104] (knitting)

[0105] The obt...

Embodiment 2

[0111]Using the staple fiber yarn described in Example 1, knitting at 20 wales / inch (2.54cm) and 20 courses / inch (2.54cm), after refining under the same conditions as in Example 1, heat setting at 230°C , thus obtaining a knitted fabric with 21 wales / inch (2.54cm) and 20 courses / inch (2.54cm). In addition, the thickness of the knitted fabric was 0.290mm. The strength and elongation of the disintegrated yarn were measured, and the tensile strength was 2.1 cN / dtex, and the tensile elongation was 17%.

[0112] In the fire resistance evaluation of this knitted fabric, it was 15 minutes, and the combustion body did not catch fire, and had sufficient fire resistance.

Embodiment 3

[0114] In Example 1, the mixing ratio of the PPS of the spun yarn and the flame-resistant yarn was 80:20, and it carried out under the same conditions. The resulting spun yarn had a tensile strength of 2.3 cN / dtex and a tensile elongation of 19%. The yarn density of the knitted fabric after refining and heat setting was 31 wales / inch (2.54 cm) and 30 courses / inch (2.54 cm). In addition, the thickness of the knitted fabric is 0.324 mm. The strength and elongation of the disintegrated yarn were measured, and the tensile strength was 2.0 cN / dtex, and the tensile elongation was 16%. In the fire resistance evaluation of this knitted fabric, it was 15 minutes, and the combustion body did not catch fire, and had sufficient fire resistance.

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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Abstract

A fire-resistant knitted fabric, characterized in that it uses non-melting fiber A with a high-temperature shrinkage rate of 3% or less, and has an LOI value of 25 or more based on JIS K 7201-2 (2007) and has a higher than non-melting fiber A. A is made of thermoplastic fiber B with low ignition temperature and melting point, the elongation at break of the yarn constituting the knitted fabric is greater than 5%, and, in the projected area of ​​the complete structure of the knitted fabric, the area of ​​the above-mentioned non-melting fiber A The ratio is 10% or more, the area ratio of the thermoplastic fiber B is 5% or more, and the thickness of the flame-retardant knitted fabric according to JIS L 1096-A method (2010) is 0.08 mm or more. Provides fire-resistant knitted fabrics with high fire resistance.

Description

technical field [0001] The present invention relates to fire-resistant knitted fabrics. Background technique [0002] Conventionally, in applications requiring flame retardancy, methods of incorporating agents having flame retardancy effects into polyester, nylon, and cellulose-based fibers at the raw yarn stage, and methods of imparting flame retardancy through post-processing have been used. [0003] As flame retardants, halogen-based and phosphorus-based agents are generally used, but in recent years, replacement from halogen-based chemicals to phosphorus-based chemicals has progressed due to environmental regulations. However, phosphorus-based chemicals may not be as effective in flame retardancy as conventional halogen-based chemicals. [0004] prior art literature [0005] patent documents [0006] Therefore, as a method of imparting higher flame retardancy, there is a method of compounding a polymer having high flame retardancy. For example, composites of meta-ara...

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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Patent Type & Authority Patents(China)
IPC IPC(8): D04B1/16D02G3/04
CPCD04B1/16C09K21/14D02G3/443D10B2401/04D02G3/04D04B21/16D02G3/045
Inventor 原田大土仓弘至
Owner TORAY IND INC