Patent ID: 7759580

Claim:
A halogen-free flame retardant composition for a cable-covering material used to form a coating layer of cable for railway vehicles, comprising: 100 parts by weight of a base resin including 50 to 80 parts by weight of an ethylene-vinylacetate copolymer having a vinylacetate content of 50 to 80% by weight, and 20 to 50 parts by weight of an ethylene-vinylacetate copolymer having a vinylacetate content of 28 to 49% by weight; 60 to 250 parts by weight of mixed metal hydroxide acting as a halogen-free flame retardant and composed of 30 to 100 parts by weight of untreated metal hydroxide and 30 to 150 parts by weight of metal hydroxide surface-treated with silane; 1 to 30 parts by weight of a flame-retardance auxiliary; 0.5 to 5 parts by weight of a silane-based coupling agent; 0.5 to 8 parts by weight of a cross-linking formulation; and 3 to 15 parts by weight of a cross-linking agent.