Process for the production of foam mould for use in at least one developing the partial and / or cross connection of a composite material process and mold

摘要

A technique of producing polyolefin foam with a two-stage process, wherein the first stage involves expanding a preformed cylindrical tube comprising a polymer, blowing agent, cross-linking agent and blowing agent activator in an enclosed cylindrical mould. The cylindrical mould constrains the expansion of the foam without the need for hydraulic rams or similar mechanical means as are found in conventional platen presses. During the second stage, the cylindrical tubes of material are heated while unconstrained and expands symmetrically. The cylindrical tube of expanded foam material is then slit and may be cold pressed in order to form cystose. Variations on the cylindrical tube mould shape may be used and patterns and other features may be formed on the interior of the cylindrical mould in order to produce a product containing the imprint thereof. Polyolefin foam so produced may be used in building, packaging, clothing and similar applications.