Polypropylene resin composition, expansion-molded article using the resin composition, and process for production of the expansion-molded article
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United States of America Patent
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Dec 30, 2014
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N/A
app pub date -
Sep 28, 2007
filing date -
Apr 24, 2007
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Abstract
A polypropylene resin composition which can produce an expansion-molded article showing excellent low-temperature impact properties even when expanded at an increased expansion rate; an expansion-molded article using the polypropylene resin composition, which has excellent low-temperature impact properties, is light in weight, and has good appearance; and a process for producing the expansion-molded article. Using a polypropylene resin composition comprising 100 weight of a polypropylene resin and 1 to 4 parts by weight of a polyethylene wax having a viscosity average molecular weight of 2400 to 3400, an expansion-molded article which is expanded at an expansion rate of 1.5 to 3 times is produced by injection expansion molding by means of a gas counter pressure technique.
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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