Flame retarded cladding

Details Flame retarded cladding Flame retarded cladding

H - Electricity

01

B

337/75

H01B 3/42 (2006.01) C08K 9/04 (2006.01) H01B 3/30 (2006.01) H01B 3/44 (2006.01) H01B 7/295 (2006.01)

Patent

CA 1221146

ABSTRACT FLAME RETARDED CLADDING Polymeric cladding for elongate substrates, preferably electrical conductors, comprises an inner layer and an outer layer, the outer layer being a cross-linked polymer composition filled with halogen- free particulate inorganic flame retardant filler which has been treated with material which increases the elongation to break of the composition at 200°C to at least 50%. The enhanced elongation enables the cladd- ing better to resist burning, possibly by reducing the tendency for the outer layer to split when exposed to fire. Bundles of insulated electrical wires may be wrapped in mineral tape, preferably mica tape, to provide circuit integrity cables which are significant- ly smaller and/or lighter than previously known.

438054

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