Patent ID: 7091139

Claim:
A flame-retardant leather-like sheet substrate, which comprises; (A) a layer of an entangled nonwoven fabric comprising a polyester superfine fiber (a) of a single fiber fineness of 0.5 dtex or less containing no flame-retardant component and a flame-retardant polyester superfine fiber (b) of a single fiber fineness of 0.5 dtex or less containing a flame-retardant component in a ratio, (a)/(b), of 100/0 to 40/60 by mass, the entangled nonwoven fabric containing in its inside an elastomeric polymer (c) containing a flame-retardant component; and (B) a layer of an entangled nonwoven fabric comprising the polyester superfine fiber (a) and the flame-retardant polyester superfine fiber (b) in a ratio, (a)/(b), of 70/30 to 0/100 by mass, the entangled nonwoven fabric containing in its inside the elastomeric polymer (c) containing the flame-retardant component, the ratio of the total polyester superfine fiber (a) and the total flame-retardant polyester superfine fiber (b) in the flame-retardant leather-like sheet substrate being 10:90 to 90:10 by mass.