METHOD FOR MANUFACTURING FOAM-MOLDED ARTICLE, AND FOAM-MOLDED ARTICLE

摘要

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.

主权项

1. A method for manufacturing a foam-molded article, the method comprising foaming and molding a base material resin in which a first polyethylene-based resin, a second polyethylene-based resin, and a polypropylene-based resin are mixed, wherein
the first polyethylene-based resin has a long-chain branched structure with a density of 0.920 g/cm3 or more; the second polyethylene-based resin is manufactured by a low pressure slurry method, has a long-chain branched structure with a density of 0.920 g/cm3 or less, and has a melt tensile force of 70 mN or more at 160° C.; and the polypropylene-based resin has a compounding ratio of 20% or more by weight of the base material resin.