Procedure for the production of molded articles given in a cellular nucleus and a non-cellular surface layer. (Machine-translation by Google Translate, not legally binding)

摘要

Process for the production of molded articles provided with a cell nucleus and a non-cellular surface layer, characterized in that in a first step, a predetermined amount of non-foamable thermoplastic resin is injected into the cavity of a mold and, in a second step, before the central part of said non-foamable thermoplastic resin has hardened, a thermoplastic resin composition containing a blowing agent at the temperature of activation of the blowing agent or at a higher temperature is injected into the mold cavity, the composition remaining in said cavity long enough to allow the foamable composition to foam and the thermoplastic materials to harden. (Machine-translation by Google Translate, not legally binding)