PROCESS AND DEVICE FOR PRODUCING CROSS-LINKED POLYOLEFIN FOAMS

摘要

Furnaces for cross-linking and foaming polyolefin plates or foils having several successive zones associated each with a foil heating device are known. The aim of the invention is to enable cross-linked polyolefin foams to be produced in a more economical manner. According to the disclosed process, hot air flows past the polyolefin plate or foil against its transport direction. The disclosed device (24) for heating the polyolefin plate or foil (2) is arranged and designed in such a way that the hot air (25) leaving the device (24) flows parallel to the plate or foil plane (26). The device for heating the polyolefin plate or foil (2) is preferably a heating tunnel (30) which encloses the plate or foil (2).