Method for cross-linking a foamable plastic
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorMarcel Salamon
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Abstract
A plastic is converted from an initial condition with a higher density into a foamed condition with a lower density using a blowing agent, wherein the plastic is cross-linked prior to foaming by means of a first cross-linking agent and during the foaming by means of at least one second cross-linking agent.
Claims30
A process for foaming a plastic wherein the plastic is converted to a foamed state by a blowing agent in a foaming process, comprising cross-linking the plastic before foaming by a first cross-linking agent, wherein, when the first cross-linking agent is high-energy radiation, it penetrates through the entire plastic;
- and cross-linking the plastic during foaming by a second cross-linking agent.
A process for foaming a plastic in the presence of a blowing agent, comprising:
- cross-linking the plastic before foaming by exposure to high-energy radiation;
- and
- cross-linking the plastic during foaming by exposure to a second cross-linking agent;
- wherein said plastic is locally exposed to different energy doses.
Dependencies are inferred from the claim text.