Patent ID: 7105227

Claim:
A flame-retardant artificial leather sheet substrate, comprising: a nonwoven fabric of three-dimensionally entangled superfine fibers (A) of at most 0.5 dtex in fineness, and a polymer elastomer (B) filled in the nonwoven fabric, wherein the superfine fibers (A) comprise an organophosphorus component-copolymerized polyester and the polymer elastomer (B) satisfies at least one of the following (1) or (2): (1) the polymer elastomer (B) contains a metal hydroxide; (2) the polymer elastomer (B) is copolymerized with an organophosphorus component, and wherein said flame retardant artificial leather sheet substrate has a fire spreading speed of not more than 100 mm/min. as measured in the combustion test method of JIS D1201.