| 摘要 |
PURPOSE: A film for preventing the frictional sound is provided to prevent the sound generated by the friction of a steel frame and a spring and an urethane foam cushion material in a car sheet. CONSTITUTION: The film comprises 25-75 wt% of one selected from the group consisting of ethylene ethyl acrylate copolymer, ethylene vinyl acetate, ethylene methyl acrylate copolymer, a copolymer of ethylene ethyl acrylate and low density polyethylene, and their mixtures; 24-65 wt% of one selected from the group consisting of low density polyethylene, linear low density polyethylene and their mixtures; and 0.5-7.5 wt% of a filler, a film slipping agent and/or a flame retardant. Preferably the ethylene ethyl acrylate copolymer contains 17-25 wt% of ethyl acrylate and has a melting index of 5-25 dg/min and a hardness of 81-85; the ethylene methyl acrylate copolymer contains 18 wt% of methyl acrylate and has a melting point of 87 deg.C; the low density polyethylene has a melting index of 0.3 g/10 min and a density of 0.92 g/cc; and the linear low density polyethylene has a melting index of 0.7 g/10 min and a density of 0.928 g/cc.
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