Electron radiation cross-linked polypropylene foam sheet and preparation method thereof

Abstract

The invention provides an electron radiation cross-linked polypropylene foam sheet and a preparation method thereof. The electron radiation cross-linked polypropylene foam sheet comprises 55-68wt% of a polypropylene resin, 10-20wt% of a polyethylene resin, 10-15wt% of a polyoxyethylene resin, 4-9wt% of a cross-linking agent, 3-8wt% of an antioxidant and 5-10wt% of a foaming agent. The performances of materials and the characteristics of a production technology are fully combined, a radiation process is utilized to overcome the rapid decrease trend of the intensity of polypropylene when the temperature is higher than the melting point, the content of polyethylene in the sheet plays a substantial role in the cross-linking degree of polypropylene, and the cross-linking degree of polypropylene is the key for polypropylene foaming. Compared with polypropylene foam sheets obtained through common radiation cross-linking methods, the polypropylene foam sheet prepared in the invention has the advantages of substantially improved performances, obviously improved tensile strength and elongation at break, fine foam holes, and uniform foaming.

Description

Technical field [0001] The invention relates to an electronic radiation cross-linked polypropylene foam sheet (IXPP) and a preparation method thereof. Background technique [0002] As a bulk product in the petrochemical industry, polypropylene (PP) has the characteristics of a wide range of sources, low cost and wide application. PP foam material improves the two major shortcomings of PS and PE foam materials in terms of high temperature resistance and reuse. PP foam materials play an important role in packaging, construction and other fields, and can be used as cushioning packaging, sound insulation materials, and thermal insulation materials. In addition to high heat resistance, high impact energy absorption, good resilience and easy thermoformability, PP foam material has the advantage of being recyclable and can be used to make auto parts. Cross-linked foamed PP is laminated and compounded with skin materials and cushioning materials, which can be made into interior decorat...

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Problems solved by technology

But at present, neither the expansion ratio nor the mechanical properties of the material can meet the needs of the market.

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