Fluoroelastomer composition and heat shrinkable articles comprising same

An electrical insulating article consisting of a mixture of a first copolymer, a second copolymer and a cross-linking agent, said first copolymer consisting essentially of monomers of tetrafluoroethylene and propylene and being present in an amount of 100 parts by weight;

• said second copolymer consisting essentially of monomers of vinylidene fluoride and fluoroolefin and being present in an amount not smaller than 1 part by weight and smaller than 100 parts by weight;
• said vinylidene fluoride-fluoroolefin copolymer having a fluoroolefin content of 1 to 20 mol%, said fluoroolefin in said vinylidene fluoride-fluoroolefin copolymer being selected from the group consisting of hexafluoropropylene and tetreafluoroethylene, said first and said second copolymers essentially not being copolymerized with each other, and aid mixture having been cross-linked by irradiation with electron beams the cross-linked mixture having a brittleness temperature of about -10.degree. C. or below.