| 摘要 |
<p>PURPOSE:To decrease the heat shrinkage factor at molding under heat so as to obtain stable and sure moldability by a method wherein a strain-free skin layer is formed on the surface of a crosslinked foamed sheet by extrusion laminating method and at the same time crosslinked foamed sheets are laminated to each other by piling them up. CONSTITUTION:A non-intumescent skin layer 3 is laminated to one side 6a of a crosslinked foamed sheet 6, which consists of propylene-based polymer and ethylene- based polymer, by extrusion-laminating a molten resin sheet 10 made of propylene- based polymer. Simultaneously, a decorative skin layer 4 is fixed by pressure to the skin layer 3 and cooled in order to mold a first laminate A with triple layer structure. A non-intumescent skin layer 2 is laminated to one side 5a of a crosslinked foamed sheet 5, which consists of propylene-based polymer and ethylene-based polymer, by extrusion-laminating the molten resin sheet 10 made of propylene-based polymer in order to mold a second laminate B. The respective surfaces on the sides of the crosslinked foamed sheets 6 and 5 of the laminates A and B are arranged face to face so as to be fixed by pressure while being melted by heating in order to form a laminated material C. At this time, a heat fusion layer 7 is formed at the pressure fixing portion. Finally, the laminated material is cut in lengths.</p> |
