| 摘要 |
PURPOSE:To obtain a composition for sliding material that can be injection, compression or transfer molded, by mixing uniformly a heat-resistant resin and organic fibers having a melting point higher than that of said resin under pressure and heating by using a pressurized type kneader. CONSTITUTION:When at least a heat-resistant resin and organic fibers having an average length of 1-10mm. and a melting point higher than that of said heat- resistant resin are mixed, a pressurized type kneader is used to mix them uniformly under pressure and heating. If the average length of the fibers is 1mm. or less, less reinforcing effect is observed, which if the average length of the fiberss 10mm. or more, they would, during the kneading cling fast to the blades of the kneader or become continuously entwined so that they interfere with the kneading operation or become difficult to take out the kneaded material. The high meling point organic fibers that can be used are aromatic polyamide fibers that can be obtained synthetically by the condensation of an aromatic diamine with an aromatic dicarboxylic acid or its derivative, and in particular polyparaphenylene terephthalamide fibers are preferred in view of heat resistance and reinforcing effect. |
