| 摘要 |
<p>A composite foamed polypropylene resin molding including a pluralit y of sections which are fuse-bonded to each other, at least two of which diffe r from each other in color, apparent density, composition and/or mechanical strengths, each of which is formed from expanded polypropylene resin beads, and each of which shows a high temperature endothermic peak in a DSC curve thereof. At least one of the sections satisfies conditions (d) to (f) at the same time: (d) to be formed from specific expanded polypropylene resin beads of a base resin having a tensile modulus of at least 1,200 MPa, (e) to have an apparent density D2 of 10-500 g/L, and (f) to have such a high temperature endothermic peak with a calorific of E2 J/g, wherein D2 and E2 have the relationship 20 - 0.020 X D2 <= E2 <= 65 - 0.100 X D2. The composite m olding may be prepared by filling expanded polypropylene resin beads in each ofa plurality of contiguous spaces defined in a mold cavity and heating the expanded beads to fuse-bond respective expanded beads together into a unitar y body. At least one of the spaces is filled with the specific expanded polypropylene resin beads.</p> |
