| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin molding which has fine, uniform voids and is light is weight, high in rigidity and internal loss, and excellent in stability and a part for an electro-acoustic transducer. SOLUTION: In the resin molding obtained by increasing the volume of a cavity after a resin material of a mixture of a synthetic resin and inorganic fibers is injected and compressed, a plate-shaped inorganic filler and a gas generating substance are mixed and incorporated into the resin material, and the resin material is expanded by using the reaction of the inorganic fibers to increase its thickness after being injected and compressed. |
