Patent ID: 6638617
Filing Date: 2003-10-28
Classification: H01B,Y10T

Abstract:
A dual layer insulation system, which comprises:a) a first insulating layer having a thickness of at least about 0.6 millimeters and comprising a cross-linked, highly flame-retardant and halogen-free resin composition, wherein said resin composition comprises: 100 parts by weight of a thermoplastic resin; from about 100 to about 250 parts by weight of at least one flame-retarding agent; and from about 1 to about 10 parts by weight of an organosilicon compound represented by the formula: â€ƒwherein R represents an alkyl group containing an acrylic or methacrylic group and wherein Y1, Y2, and Y3 each represents a group selected from an alkyl group, an alkoxyl group, and mixtures thereof; and b) a second insulating layer having a thickness and comprising a thermoplastic material selected from alloys of polyolefins and polyamides, polyamides, polyamide/polyether block copolymers, polyesters, polyethylenes, polyurethanes and mixtures thereof, â€ƒwherein the thickness of said second insulating layer is at least 4 percent of said thickness of the first insulating layer.