| 摘要 |
PURPOSE:To facilitate the production by a conventional single-screw extruder of a thermoplastic resin composition in which a high-viscosity liquid additive is uniformly distributed in a high concentration, by employing a mixture of the high-viscosity liquid additive and a fine powder of an anhydrous inorganic compound. CONSTITUTION:Use is made of a mixture of 10-90wt% high-viscosity liquid additive of a viscosity (at room temperature) >=5,000cSt (e.g., mineral or silicone oils having the above properties) and/or a solid additive of a m.p. >=40 deg.C (e.g., waxes or silicone greases having the above properties) and 90-10wt% fine powder (average particle diameter <=50nm) of an anhydrous inorganic compound (e.g., SiO2 or Al2O3). Namely, a thermoplastic resin (e.g., polybutadiene, rubber- modified styrene resin, or polyvinyl chloride) is mixed with the above mixture so that the content of the additive may be at least 0.5wt%, and the mixture is kneaded with a kneading machine such as a single-screw extruder.
|
