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Modacrylic/cotton/aramid fiber blends for arc and flame protection

a technology of arc and flame protection and modacrylic, which is applied in the field of blended yarn, can solve the problems of electrical arcs that are extremely violent, equipment and emergency personnel who respond to incidents near electrical equipment are at risk, and individuals working,

Inactive Publication Date: 2005-09-22
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013] The yarn is useful for incorporation into a thermally and arc resistant fabric and a garment especially suited for protecting workers against electrical arc. Furthermore the fabric and garment may provide resistance to break open, flame and abrasion.

Problems solved by technology

Individuals working near energized electrical equipment and emergency personnel who respond to incidents near electrical equipment are at risk from electrical arcs and flame hazards which could result from an arcing event.
Electrical arcs are extremely violent events typically involving thousands of volts and thousands of amperes of electricity.
Arc protective and flame resistant garments typically are uncomfortable to wear due to the poor moisture vapor transport of the protective fibers incorporated within.
Individuals wearing protective apparel typically experience both tactile discomfort and heat stress as a result of the protective fibers incorporated in their protective garments.
Also, Green does not disclose a protective fabric formed from yarns comprising less than 50 percent cotton.

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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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] A comfortable and durable fabric was prepared having in the both warp and fill of ring spun yarns of intimate blends of Nomex® type 462, Kevlar® 29, Modacrylic and Cotton. Nomex® type 462 is 93% of poly(m-phenylene isophthalamide)(MPD-I), 5% of poly(p-phenylene terephthalamide)(PPD-T) and 2% of static dissipative fibers (P-140 from DuPont), Modacrylic is ACN / polyvinylidene chloride co-polymer with 15% antimony (known as Protex®M), and Kevlar® 29 is poly(p-phenylene terephthalamide)(PPD-T).

[0043] A picker blend sliver of 10 wt. % of Nomex® type 462, 10 wt. % of Kevlar® 29, 55 wt. % of Modacrylic and 25 wt. % of cotton was prepared and processed by the conventional cotton system into a spun yarn having twist multiply 3.7 using a ring spinning frame. The yarn so made was 24.6 tex (24 cotton count) single yarn. Two single yarns are then plied on the plying machine to make a two-ply yarn. Using similar process and same twist and blend ratio, a 32.8 tex (18 cotton count) yarn was ...

example 2

[0045] A comfortable and durable fabric was prepared having in the both warp and fill of ring spun yarns of intimate blends of Nomex® type 462, Kevlar® 29, Modacrylic and Cotton. Nomex® type 462 is 93% of poly(m-phenylene isophthalamide)(MPD-I), 5% of poly(p-phenylene terephthalamide)(PPD-T) and 2% of static dissipative fibers (P-140 from DuPont), Modacrylic is ACN / polyvinylidene chloride co-polymer with 15% antimony (known as Protex®M), and Kevlar® 29 is poly(p-phenylene terephthalamide)(PPD-T).

[0046] A picker blend sliver of 10 wt. % of Nomex® type 462, 10 wt. % of Kevlar® 29, 45 wt. % of Modacrylic and 35 wt. % of cotton was prepared and processed by the conventional cotton system into a spun yarn having twist multiply 3.7 using a ring spinning frame. The yarn so made was 24.6 tex (24 cotton count) single yarn. Two single yarns are then plied on the plying machine to make a two-ply yarn. Using similar process and same twist, a 32.8 tex (18 cotton count) yarn with blend of Nomex®...

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

Yarns, fabrics and garments contain modacrylic, cotton and aramid fibers.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to a blended yarn useful for the production of fabrics which possess arc and flame protective properties. This invention also relates to garments produced with such fabrics. [0003] 2. Description of Related Art [0004] Individuals working near energized electrical equipment and emergency personnel who respond to incidents near electrical equipment are at risk from electrical arcs and flame hazards which could result from an arcing event. Electrical arcs are extremely violent events typically involving thousands of volts and thousands of amperes of electricity. Electrical arcs are formed in air when the potential difference (i.e. voltage) between two electrodes causes the atoms in the air to ionize and become able to conduct electricity. [0005] Arc protective and flame resistant garments typically are uncomfortable to wear due to the poor moisture vapor transport of the protective fibers incorpo...

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): D02G3/04D02G3/44
CPCD02G3/047D02G3/443D10B2331/021D10B2321/101D10B2201/02Y10T442/608Y10T442/3984Y10T442/3065Y10T442/438Y10T442/3138Y10T442/696Y10T442/3976Y10T442/697Y10T442/313Y10T442/425D02G3/04D02G3/44
Inventor ZHU, REIYAO
Owner EI DU PONT DE NEMOURS & CO
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