| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker edge whose thickness is≤200μm and which is excellent in both internal loss and flexibility, for a small-sized speaker of a cellular phone or a personal computer or the like for which thinning is required, which is obtained by injection molding. SOLUTION: The speaker edge whose thickness is≤200μm is obtained by injection-molding a composition containing a component (A) which is 100 pts.mass of at least one kind selected from the triblock copolymer (a-1) of polystyrene-hydrogenated polybutadiene-polystyrene, the triblock copolymer (a-2) of polystyrene-hydrogenated polyisoprene-polystyrene and the triblock copolymer (a-3) of polystyrene-hydrogenated butadiene/isoprene copolymer-polystyrene, a component (B) which is 2 to 20 pts.mass of polyolefine, and a component (C) which is 70 to 300 pts.mass of oil. COPYRIGHT: (C)2009,JPO&INPIT
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