| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker diaphragm excellent in balance between rigidity and internal loss and excellent in moldability. SOLUTION: The speaker diaphragm of this invention has a base material containing woven cloth of polytrimethylene telephthalate fibers, and thermosetting resin which is pregnated into the base material and hardened. Preferably, 1, 3-propanediol constituting the polytrimethylene telephthalate fibers is derived from corn. Preferably, the thermosetting resin is unsaturated polyester resin and at least a part of the polytrimethylene telephthalate fibers is coated with second thermosetting resin. COPYRIGHT: (C)2006,JPO&NCIPI |
