Verbundwerkstoff aus Polypropylen mit Formteil und Schaumschicht und Verfahren zu dessen Herstellung

摘要

A composite material including a polypropylene resin molded body having a melting point MB DEG C, and a foamed body of expanded particles fuse-bonded to the molded body, wherein the foamed body has at least two endothermic peaks (P1,P2) in DSC curve (100) thereof at peak temperatures of 135 DEG C or more, wherein the highest temperature endothermic peak thereof is at a peak temperature of PH DEG C which is not lower than (MB - 5) DEG C and has such an area at temperatures not lower than (MB - 5) DEG C that corresponds to a calorific value (Q) in the range of at least 8 J/g, and wherein the peel strength between the molded body and the foamed body is at least 1.5 kg/15 mm. The composite material is produced by molding the expanded particles in a mold cavity in which the molded body is previously placed.