A method for improving the quality of foamed plastic materials
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 鹤山市盛世光华隔热材料有限公司
- Publication Date
- 2021-09-10
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Abstract
Description
technical field
[0001] The invention relates to the technical field of foamed plastic molding, in particular to a method for improving the quality of foamed plastic materials. Background technique
[0002] The technology of plastic foaming has a long history. It was the foam bakelite in the early 1920s, which was made by a method similar to that of foam rubber. In the 1930s, rigid polyurethane foam and polystyrene foam appeared. In the 1940s, there were polyethylene, polyvinyl chloride, Epoxy resin, phenolic foam, and expandable polystyrene foam and soft polyurethane foam in the 1950s. Now, basically all plastics, including thermoplastic and thermosetting, can be foamed into foam plastics. Industrial preparation methods There are: extrusion foaming, injection foaming, molding foaming, calendering foaming, powder foaming and spraying foaming, etc. Among them, injection foaming is one of the most important molding methods. The plastic foaming method depends on the used The di...