Electrically insulating film backing

Details Electrically insulating film backing Electrically insulating film backing

H - Electricity

01

B

H01B 3/44 (2006.01) C08J 5/18 (2006.01) C08K 3/22 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2147367

An electrically insulating film having a total halogen content of about 1 % to about 8 %, comprising a resin component containing: (a) from 0 to about 40 parts of a rubber selected from EP or EPDM rubber, (b) correspondingly, from about 60 to about 100 parts of an ethylene vinyl acetate polymer, (c) from about 20 % to about 40 % based on said resin component, of a flame retardant system comprising (i) from about 5 to about 25 % of a bromine containing flame retardant, (ii) from about 1.5 % to about 10 % of an antimony containing flame retardant, and (iii) from 1 % to about 20 % of a flame retardant selected from granular metal oxide hydrates, wherein said flame retardant system has a ratio of metal oxide hydrate to bromine of no more than about 3; said film being free of vinyl chloride, wherein a nonoriented film self-extinguishes in less than about 5 seconds, has an elongation at break of at least about 500 %, a dielectric strength of at least about 1200 V/Mil, and a stress-strain curve having a wholly positive slope.

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