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Altering physical or physico:chemical properties of polymers etc. - by combining cooling with other effects such as pressure and vibration
Altering physical or physico:chemical properties of polymers etc. - by combining cooling with other effects such as pressure and vibration
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机译:改变聚合物的物理或物理:化学性质等-通过将冷却与其他影响(例如压力和振动)相结合
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摘要
A workpiece is cooled from a molten, pasty or solid state to a solid, crystalline or amorphous state, while =1 other physical parameter is altered, e.g. pressure; the frequency or amplitude of vibrations; or an electric field voltage, current or frequency. The physical parameters are altered according to a program w.r.t. time, while the cooling rate depends on the conditions of heat transfer. The change of state may be achieved via forming process, or by heating and quenching and/or tempering. The workpiece consists esp. of polymer resin powder, granulate, sheet, foil or laminate, which is heated to a vitreous, semicrystalline, rubbery or molten state, and then subjected to pressure and vibration. Also used for processing metals, glass, ceramics, and rubber etc.
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