METHOD FOR MANUFACTURING FOAM-MOLDED ARTICLE, AND FOAM-MOLDED ARTICLE
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United States of America Patent
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Issued Date -
Feb 12, 2015
app pub date -
Jan 22, 2013
filing date -
Jan 30, 2012
priority date (Note) -
Abandoned
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Abstract
A foam-molded article has high weldability to a polypropylene-based resin molded article, a high expansion ratio, and a predetermined level of impact resistance despite using inexpensive polyethylene-based resin. The foam-molded article includes a foamed and molded base material resin in which a first polyethylene-based resin, a second polyethylene-based resin, and a polypropylene-based resin are mixed. The first polyethylene-based resin has a long-chain branched structure and a density of 0.920 g/cm3 or more. The second polyethylene-based resin is manufactured by a low pressure slurry method, and has a long-chain branched structure and a density of 0.920 g/cm3 or less. The second polyethylene-based resin has a melt tensile force of 70 mN or more at 160° C. The polypropylene-based resin has a compounding ratio of 20% or more by weight of the base material resin.
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