| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a light core material in a simple process which has a good mechanical characteristic and is used for molded ceiling of an automobile, by laminating styrene copolymer resin films on both sides of a thermoforming semi-rigid plate shape polyurethane foam. SOLUTION: A core material 10 is formed by laminating 100μm thick styrene maleic-anhydride copolymer resin films 2, 2 on both sides of a thermoforming semi-rigid plate shape polyurethane foam 1 of which the thickness is 3-8 mm and of specific gravity 0.035, and by arranging a polyester nonwoven fabric 3 on the film. By carrying such layer structure into an oven with a conveyer, heating it to temperature higher than 130 deg.C, fusing the copolymer resin films 2, 2, then speedily transferring it to a cold molding machine, holding and pressurizing it with the forming die, and molding it into a desired recessed and projecting shape, the core material 10 is produced. The core material 10 made in such way is very light and high rigid due to its foam core structure, and has very excellent size stability.
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