| 摘要 |
PURPOSE:To enable the title method to disperse a fiber uniformly in a state of a sole and short fiber within a resin material, by a method wherein a short fiber bundled in a spherical state and having specified specific gravity and grain diameter and powder or a pellet of thermoplastic resin are mixed up with each other and kneaded at a temperature of the hot melting temperature or more. CONSTITUTION:A short fiber 1 bundled in a spherical state whose bulk specific gravity is 0.04-0.15 and a grain diameter is 10mm or less and powder or pellet 3 of thermoplastic resin are fed to a kneading and extruding machine 5 at a time respectively by quantitative feeders 2, 4 and kneaded at a temperature of the hot melting temperature or more of the thermoplastic resin. Then an extruded thing is treated by a pelletizer 6 and a resin material 7 mixed with the fiber is obtained. When the bulk specific gravity of a spherically-bundled thing falls within the above range, the fiber is dispersed within the resin in a uniform form and a state of the short fiber. When the bulk specific value is low to the same, as the fiber remains at last only the fiber, whose concentration is predetermined level or less, can be dispersed. In the case where bulk concentration is extremely high, the same is hard to disperse. |
