Patent ID: 9057533
Filing Date: 2015-06-16
Classification: B29C,B29K,B29L,B60H,F24F

Abstract:
1. A duct comprising a foamed blow-molded article constituted of a polyolefin-based resin having a bending elastic modulus of 800 MPa or higher and 1,300 MPa or lower, said foamed blow-molded article having an average apparent density (D) of 0.1 g/cm 3 or higher an 0.4 g/cm 3 or lower, an average thickness (T) [cm], and a closed cell content of 60% or higher, wherein the product (D×T wherein said foamed blow-molded article has an inner surface side region having an average apparent density (D1) and an outer surface side region having an average apparent density (D2), and wherein a ratio (D1/D2) of the average apparent density (D1) to the average apparent density (D2) is lower than 1.