Process for producing pre-expandable plastic beads and beads obtainable according to said process

摘要

The present invention relates to a process for producing pre-expandable plastic beads adapted to be used in a injection-molding process for the manufacture of plastic components of devices or machines. The invention also refers to pre-expandable plastic beads obtainable according to said process. The pre-expandable plastic beads are particularly suitable for the production of injection molded plastic components of household appliances as washing machines, dryers, dishwashers, refrigerators. The process comprises the step of:
a) providing plastic beads to be fed into an injection-mould machine for carrying out an injection-mould of a foamed plastic component;
b) preparing a liquid solution comprising at least one blowing agent and a binder;
c) coating said beads with a film of said liquid solution;
d) letting said film to solidify onto said beads.