Process for preparation of resin composition for powder molding and process for production of powder molded product.

摘要

There is disclosed a process for preparing a resin composition for powder molding, comprising 50 to 97 wt% of a metal or alloy powder and 50 to 3 wt% of a thermoplastic resin having heat resistance and crystallinity, which process comprises dissolving the thermoplastic resin having heat resistance and crystallinity in a solvent and at the same time, dispersing therein at least one metal or alloy powder selected from iron, brass, nickel silver, stainless steel and aluminum, having an average particle diameter of not more than 500 mu m to thereby prepare a mixture, and then gassifying or evaporating the solvent of the mixture. In addition, there is disclosed a process for producing a powder molded product which comprises cold compressing molding the above resin composition and then heating the molding at a temperature not less than the melting point of the thermoplastic resin. This powder molded product has excellent dimensional stability against heat, chemical resistance, and mechanical strength.