Molding process for plastics
AssigneesDai Nippon Toryo Co., Ltd., Tokai Kogyo Kabushiki Kaisha
InventorsTakao Sakakibara, Tsunehiko Toyoda, Yoshihisa Nagashima
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Abstract
A molding process for producing a molded plastic product with a resin coating layer formed on its surface, which comprises electrostatically coating a powdery resin composition on the inner surface of a mold, filling and molding a plastic material in the mold to form a molded plastic product, and plasticizing, under compression, said powdery resin composition by the heat of the filled plastic material and/or by the heat for molding the filled plastic material, to form a resin coating layer securely bonded to the surface of the molded plastic product by anchor effect.
Claims14
A molding process for producing a molded plastic product with a resin coating layer formed on its surface, which comprises electrostatically coating an electrically conductive powdery resin composition on the inner surface of a mold, filling and molding a plastic material in the mold to form a molded plastic product, and plasticizing, under compression, said electrically conductive powdery resin composition by the heat of the filled plastic material and/or by the heat for molding the filled plastic material, to form an electrically conductive resin coating layer securely bonded to the surface of the molded plastic product by anchor effect, wherein the electrically conductive powdery resin composition is a thermoplastic or thermosetting powdery resin composition containing from 70 to 95% by weight of an electrically conductive fine powder, and having a particle size of from 0.5 to 100 .mu.m.
Dependencies are inferred from the claim text.