| 摘要 |
PURPOSE:To prevent the fusion of silk powder particles to one another and generation of polychaetan cilia by wet-crushing a powdery, granular, or short fiber-shaped silk material to superfine powder having <=6mu particle diameter with a solvent such as dimethylformamide as a medium. CONSTITUTION:The powdery, granular, or short fiber-shaped silk material is wet-crushed by a wet ball mill, etc., with an org. solvent such as dimethylformamide and toluene as a medium. As a result, superfine silk powder having <=6mu particle diameter is obtained. The silk material is classified by a pneumatic classifier to obtain the silk powder contg. >=90wt.% particles having <=50mu diameter. The classified silk material having uniform particle diameter is crushed by a ball mill, etc., with an org. solvent such as dimethylformamide and toluene as a medium to obtain silk powder having <=6mu diameter. The silk powder is mixed with a resin material along with the org. solvent, and the mixture is formed into a film. |
