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Polypropylene(PP) Foam Materials

Polypropylene (PP) foam materials are widely used in automobile, construction, food packaging, household appliances and other fields. Nowadays, the commercial PP foam is being produced by using High Melt Strength PP (HMSPP) as matrix and propane or butane as foaming agent. The process of the products is costly, because the foaming equipments must be specially treated for preventing explosion. Meanwhile, the PP foam is keeping as high as 20% annual growth in China, core industrial technology for PP foaming is still absent. The division of Polymers and Composites has recently designed and built the first pilot line of the extrusion of PP foam in the mainland. We combined the advanced supercritical fluid technology and directed the extrusion technology; we are striving to develop a PP foaming line with 100 tons capacity per year.