Flame retardant fiber blends comprising modacrylic fibers and fabrics and garments made therefrom

a technology of flame retardant fibers and blends, which is applied in the directions of yarn, textiles and paper, transportation and packaging, etc., can solve the problems of difficult dyeing of fibers, high cost, and high cost of blending, so as to achieve durability and thermal performance, the effect of reducing the number of blending

Inactive Publication Date: 2005-02-03
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although fabrics made of inherently flame retardant fibers have been very useful in protective garments, certain characteristics of these fibers present problems.
For instance, these fibers can be difficult to dye, provide uncomfortable fabric textures, and are expensive.
However, such blending often comes at the expense of durability and thermal performance.
Fabrics made from the fiber blends and yarns discussed above either naturally suffer from poor resistance to abrasion or, as disclosed in U.S. Pat. No. 4,920,000 (Green) issued on Apr. 24, 1990, utilize a large percentage of cotton fiber, which has very low abrasion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] A comfortable and durable fabric was prepared with warp and fill ring spun yarns comprising an intimate blend of Nomex® type 462, modacrylic, and nylon. Nomex® type 462 is 93% poly(m-phenylene isophthalamide)(MPD-I), 5% poly(p-phenylene terephthalamide)(PPD-T) and 2% static dissipative fibers (Type P-140, available from E. I. du Pont de Nemours of Wilmington, Del.). The modacrylic fibers in this example were ACN / polyvinylidene chloride co-polymer (available under the trademark Protex®, from Kaneka Corporation of Osaka, Japan), and the nylon used was polyhexamethylene adipamide.

[0033] A picker blend sliver of 35 weight percent of Nomex® type 462, 50 weight percent of the modacrylic and 15 weight percent of the nylon was prepared and processed by the conventional cotton system into a spun yarn having twist multiplier of 3.7 using a ring spinning frame. The yarn so made was a 24.6 tex (24 cotton count) single yarn. Two single yarns were then plied on a plying machine to make a ...

example 2

[0035] A comfortable and durable fabric was prepared comprising ring spun warp yarns made from an intimate blend of Nomex® type 462, modacrylic, and nylon, and ring spun fill yarns made from intimate blends of Nomex® type 462 and modacrylic.

[0036] Nomex® type 462 is 93% poly(m-phenylene isophthalamide)(MPD-I), 5% poly(p-phenylene terephthalamide)(PPD-T) and 2% static dissipative fibers (Type P-140, available from E. I. du Pont de Nemours of Wilmington, Del.). The modacrylic in this example was ACN / polyvinylidene chloride co-polymer (available under the trademark Protex®, from Kaneka Corporation of Osaka, Japan), and the nylon used was polyhexamethylene adipamide.

[0037] A picker blend sliver of 35 weight percent of Nomex® type 462, 50 weight percent of the modacrylic and 15 weight percent of the nylon was prepared and processed by the conventional cotton system into a spun yarn having twist multiplier of 3.7 using a ring spinning frame. The yarn so made was a 24.6 tex (24 cotton co...

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Abstract

An intimate blend of staple fibers has from 10 to 75 parts by weight of at least one aramid staple fiber, from 15 to 80 parts by weight of at least one modacrylic staple fiber, and from 5 to 30 parts by weight of at least one polyamide staple fiber. The intimate blend of staple fibers provides yarns and fabrics that are flame retardant, also referred to as fire resistant, and can be used to make flame retardant articles, such as clothing. The flame retardant fabrics may have a basis weight from 4 to 15 ounces per square yard.

Description

BACKGROUND OF THE INVENTION [0001] There is an ongoing need for flame retardant, also referred to as fire resistant, fabrics that can be used to make clothing suitable for people who work near flames, high temperatures, or electric arc flashes. In addition to showing excellent thermal performance, an effective flame retardant fabric should be durable, comfortable, and produced at low cost. Although fabrics made of inherently flame retardant fibers have been very useful in protective garments, certain characteristics of these fibers present problems. For instance, these fibers can be difficult to dye, provide uncomfortable fabric textures, and are expensive. To address these problems, inherently flame retardant fibers have been blended with fibers made of other materials. Fiber blending can be used to obtain an end fabric that combines the beneficial characteristics of each of the constituent fibers. However, such blending often comes at the expense of durability and thermal performa...

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 Applications(United States)
IPC IPC(8): D02G3/04D02G3/44
CPCD02G3/047D02G3/443Y10T428/2913D10B2331/02D10B2331/021D10B2321/101D02G3/04D02G3/44
Inventor ZHU, REIYAO
Owner EI DU PONT DE NEMOURS & CO
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