Foamable thermoplastic beads and a process for the preparation thereof

摘要: THERMOFOAMABLE THEREMOPLASTIC BEADS CONSISTING OF A THERMOPLASTIC RESIN CONTAINING AT LEAST 5% BY WEIGHT AN ALIPHATIC OLEFIN POLYMER, SAID BEING IMPREGNATED WITH FOAMING AGENT WHICH DOES NOT DISSOLVE THE TEMPERATURES AND IS GASEOUS OR LIQUID ROOM TEMPERATURE NORMAL PRESSURE; FOR EXAMPLE, PROPANE, N-PENTANE LIKE.