PRODUCTION OF POLYAMIDE RESIN INJECTION-IMOLDED OBJECT

摘要

PROBLEM TO BE SOLVED: To produce a resin injection-molded object by bonding a preformed molded object and an injection-molded object injected later by using a polyamide resin. SOLUTION: A molded object of which the surface layer composed of a polyamide resin of a bonding surface is allowed to absorb humidity or water to be lowered in glass transition temp. by 20-110 deg.C is held within a mold cavity larger than the molded object and other molten polyamide resin is injected into the residual mold cavity. By this method, the injection-molded object fused to the molded object through the bonding surface is obtained.