| abstract |
A speaker diaphragm having high rigidity and excellent waterproofness and a method for manufacturing the same are provided. A solid layer 2 comprising a wood pulp and a thermoplastic resin, wherein the mass ratio of the wood pulp to the thermoplastic resin is wood pulp: thermoplastic resin = 0: 100 to 40:60, and the wood pulp And thermoplastic resin, and the mass ratio of wood pulp to thermoplastic resin is wood pulp: thermoplastic resin = 10: 90 to 60:40, and porous layers 3 having voids are alternately laminated. Thus, the speaker diaphragm 1 in which the solid layer 2 is three or more layers, and two of them are arranged on both sides of the plate is adopted. [Selection] Figure 1 |