Preparation of foam molded shapes

Abstract

Abstract PURPOSE:To obtain an inexpensive foam molded shapes excellent in sound absorbing and insulating properties with a few working processes by a method wherein foaming body fragments stuck to thermoplastic synthetic resin binder are molded in forces, air is injected into the gaps of these foaming fragments and then the forces are released. CONSTITUTION:After thermoplastic resin binder is stuck onto the surfaces of the fragments of the foaming body or its waste, these fragments are put in forces, the forces are closed and the fragments are heated and molded pressure to obtain fine molded pieces. Then, air is injected into the gaps of the fine molded pieces to dry and cool the foam molded shapes and then is released from the forces. The binder to be used is composed of single unit substances or copolymers of vinyl acetate, acrylic ester or emulsion of ethylene vinyl acetate and water, etc. which are self-crosslinking, reactive or modified, and this binder can control viscosity and pH of the desired items very easily and various kinds of modifiers and fillers can be added at a high rate in accordance with the use.

Inventors

• 👤 Fumio Goto
• 👤 後藤　文雄
• 👤 Yasuo Tanaka
• 👤 康雄 田中

Bibliographic Details