| 摘要 |
PURPOSE: A rubber foam insulator is provided to ensure excellent thermal insulation and fire retardancy, to allow use as an insulating material for fusing a steel sheet, and to enable environment-friendly adhesion without use of separate adhesives. CONSTITUTION: A rubber foam insulator with an excellent heat sealing property is obtained by: aging a first master batch composition; adding 0.01~1 weight% of sulfur, 0.1~5 weight% of vulcanization accelerator, and 5~15 weight% foaming agent to the first master batch composition; and extruding and blowing the resultant. The first master batch composition includes 20~40 weight% of an acrylonitrile-butadiene rubber, 0.1~5 weight% of an isobutylene isoprene rubber, 1~10 weight% of low-density polyethylene, 1~10 weight% of ethylene vinyl acetate, 10~30 weight% of filler, 0.1~2 weight% of antioxidant, 5~15 weight% of lubricant and 5~15 weight% of flame retardant.
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