Fire or flame barrier material
AssigneeA/S Norsk Kabelfabrik
InventorsNarve S. Pedersen, Wilfred L. Persson, Jan Hordvik, Arvid Kristiansen
Life of this patent
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Abstract
A fire or flame barrier material comprising an ethylene copolymer matrix, 150-220 parts by weight of aluminum hydroxide and 150-220 parts by weight of calcium carbonate or calcium-magnesium carbonate. The material can also include a lubricating agent, an elasticizer, calcium oxide, a polymer softening agent, a color-aging agent, and an antioxidant agent.
Claims17
A fire or flame barrier material consisting essentially of 60-100 parts by weight of an ethylene copolymer matrix, 50-450 parts by weight of aluminum hydroxide and 150-600 parts by weight of a member selected from the group consisting of calcium carbonate and calcium-magnesium carbonate.
A rigid fire or flame barrier material consisting essentially of 100 parts of ethylene-ethyl acrylate, 220 parts by weight of aluminum hydroxide, 220 parts by weight of calcium carbonate, 10 parts by weight of a lubricant, 11 parts by weight of an elasticizer, 11 parts by weight of calcium oxide and 1 part by weight of a coloring agent.
A flexible fire or flame barrier material consisting essentially of 80 parts by weight of ethylene-ethyl acrylate, 150 parts by weight of aluminum hydroxide, 150 parts by weight of calcium carbonate, 10 parts by weight of a lubricant, 30 parts by weight of an elasticizer, 11 parts by weight of calcium oxide, 10 parts by weight of a polymer softening agent and 1 part by weight of a coloring agent.
A fire or flame barrier material, in the form of a conduit for protecting electrical cables, comprising 80-100 parts by weight of ethylene-ethyl acrylate polymer, 150-220 parts by weight of aluminum hydroxide, 150-220 parts by weight of a member selected from the group consisting of calcium carbonate and calcium-magnesium carbonate, 11-30 parts by weight of an elasticizer, 0-10 parts by weight of a polymer softening agent, 10 parts by weight of a lubricating agent, 11 parts by weight of calcium oxide and 1 part by weight of a coloring agent.
Dependencies are inferred from the claim text.