| 摘要 |
PROBLEM TO BE SOLVED: To simply and easily prevent void from generating by bonding unwoven fabric or felt for preventing void generation to at least one surface of molding. SOLUTION: Unwoven fabric 5 is, for example, bonded to a surface 6a of hard polyurethane foam resin molding 6. For manufacturing, release agents 3 and 4 are set to the inner surface of a bottom force 1 and a top force 2 respectively, and the unwoven fabric or felt 5 composed of glass fiber, vinyl chloride fiber, etc., is beforehand set by spot bonding using paste to the release agent 4 of the inner surface of the top force 2. A hard urethane foam stock solution is injected into the mold for molding, and released from the mold after hardening, and the release agents 3 and 4 are removed. At this time, the air in the mold and gas generating at the time of molding pass the permeable unwoven fabric 5, thereby they are not accumulated in a gap between the molding and the mold, and diffused uniformly. Thereby no void is generated. The unwoven fabric 5 can be used with bonding to the molding or after removing from the molding. |
