Fire retardant material and method of making the same
AssigneeNational Safety Apparel, Inc.
InventorsJung-Huang (Jason) Tsai, Elizabeth Clagg, Mitchael C. Freeman, Andrew M. Allen, Paige Johnson, William D. Townsend
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Abstract
This invention is directed to a light weight fire resistant material. The material is constructed of a plurality of oxidized polyacrylonitrile (OPAN) fibers. The fire resistant material having a weight in the range of less than about 9.0 oz/yd2, an Arc Thermal Performance Value of greater than about 8.0 and a Thermal Protection Performance of greater than about 13.0.
Claims13
A lightweight fire resistant apparel material consisting of a plurality of oxidized polyacrylonitrile, modacrylic, fire resistant rayon and para-aramid fibers, and optional chitosan, wherein;
- the oxidized polyacrylonitrile fibers are present in the fire resistant apparel material up to 25% by weight,
- the modacrylic and fire resistant rayon have a combined percentage of 65% to 75% by weight,
- wherein the oxidized polyacrylonitrile, modacrylic, fire resistant rayon and para-aramid fibers are staple fibers;
- wherein a ratio of ATPV to weight being no less than 8/7;
- and
- wherein the fire resistant apparel material is in the form of a yarn.
A fire resistant apparel material consisting of:
- 20% by weight oxidized polyacrylonitrile fibers,
- modacrylic and fire resistant rayon fibers with a combined percentage of 65% to 75% by weight, and
- p-aramid fibers,
- wherein the oxidized polyacrylonitrile, modacrylic, fire resistant rayon and p-aramid fibers are staple fibers;
- wherein a ratio of ATPV to weight being no less than 8/7;
- and
- wherein the fire resistant apparel material is in the form of a yarn.
Dependencies are inferred from the claim text.