Moldings for packaging, and process for the production thereof
AssigneeMerck Patent GmbH
InventorsHarald Meyer, Hans Bossler, Josef Scherer
Life of this patent
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Abstract
The application relates to polyethylene and/or polypropylene foam moldings for packaging which consist of more than 50% of recycled material, and to a process for the production thereof.
Claims12
A process for the production of polyethylene and/or polypropylene foam moldings which comprises fusing in a mold polyethylene and/or polypropylene foam beads wherein more than 50% of said beads are recycled polyethylene and/or polypropylene foam beads.
A polyethylene and/or polypropylene foam molding material comprising fused polyethylene and/or polypropylene foam beads wherein more than 50% of said beads are recycled polyethylene and/or polypropylene foam beads.
A process for the production of polyethylene and/or polypropylene foam moldings which comprises fusing in a mold polyethylene and/or polypropylene foam beads:
- wherein more than 50% of said beads are recycled polyethylene and/or polypropylene foam beads,
- wherein the recycled polyethylene and/or polypropylene foam beads are provided from a polyethylene and/or polypropylene foam molding material by precomminuting, grinding and dedusting of the material followed by aftertreating the polyethylene and/or polypropylene foam beads obtained therefrom at an elevated temperature to smooth the surface of the foam beads, and
- wherein the fusing in the mold is conducted at a relatively higher compression and relatively higher temperature than would be conventionally used if no recycled foam beads were used.
Dependencies are inferred from the claim text.