| 摘要 |
<p>PURPOSE:To improve working efficiency by eliminating a fear of making a device large by simplifying mold structure of a molding tool, by a method wherein hot press molding is performed by laminating a reinforcement sheet obtained by spraying water-soluble resin over a foam impregnated with urethane prepolymer. CONSTITUTION:Reinforcement sheets 3 are laminated to both sides of a foam 1 impregnated with urethane prepolymer after water-soluble synthetic resin 6 has been sprayed over the reinforcement sheets 3 and inserted immediately between a top and bottom forces 13, 12 of a hot molding tool 11. When press molding is performed by heating the hot molding tool 11, an isocyanate group of the urethane prepolymer and water in the water-soluble synthetic resin are reacted with each other and a molded ceiling base material is obtained as an interior trimming material having shape retaining properties due to curing reaction through making a molecule more high. Therefore, it becomes unnecessary to send hot air containing vapor or moisture into the hot molding tool through a vapor hole provided into the hot molding tool.</p> |
