Patent ID: 7351671

Claim:
A union fabric obtained by co-weaving: a fiber yarn (A) that has, as a principal component, a halogen-containing flame resistant fiber including 25 to 50 parts by weight of an antimony compound in 100 parts by weight of an acrylic based copolymer consisting of 30% to 70% by weight of acrylonitrile, 30% to 70% by weight of a halogen-containing vinyl based monomer and 0% to 10% by weight of a vinyl based monomer copolymerizable therewith; and a compound yarn (B) consisting of a cellulosic fiber (b-1) and a fiber melting at temperatures of 200 degrees C. to 400 degrees C. (b-2); said fiber yarn (A) comprising 30% to 70% by weight of the union fabric and said compound yarn (B) comprising 70% to 30% by weight of the union fabric wherein the total weight of the fabric is 100%; said co-woven fabric being flame resistant to an extent sufficient to pass France's Class M1 in the NF-P 92-503 Combustion Test.