PRODUCTION OF THERMOPLASTIC RESIN FOAM

摘要

PURPOSE:To produce a thermoplastic resin foam having many fine cells and only lowly undergoing thermal deformation or shrinkage even in a high temperature atmosphere. CONSTITUTION:The title process comprises the steps of adding an inert gas to a thermoplastic resin under elevated pressure, expending the obtained thermoplastic resin by heating to a temperature range at which the semicrystallization time of the resin is 5 min or below, and cooling the obtained thermoplastic resin.