Method for preparing panels made of a composite of cork and polyethylene

Abstract

The present invention relates to a process for preparation of polyethylene-cork composite panels comprising the steps of: mixing 10-64% of cork granulate and 36-90% of polyethylene granulate at room temperature, and feeding a press with this mixture; compressing this mixture in the press with a compression force in the range of 300-450 kN, at a temperature in the range of 160-200° C. and for a hot compression time between 24-180 seconds; and cooling to room temperature, with a compression force between 350-450 kN, for a cold compression time between 32 and 240 seconds; to obtain panels with a thickness between 3 and 5 mm. The invention further relates to a polyethylene-cork composite panel and also to use thereof in the construction industry, particularly as cover board core.

Dependencies are inferred from the claim text.