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    • 1. 发明授权
    • Method for producing microcellular foamed plastic material with smooth
integral skin
    • 生产具有光滑整体皮肤的微细泡沫塑料材料的方法
    • US4761256A
    • 1988-08-02
    • US6830
    • 1987-01-27
    • Scott B. HardenbrookLouis P. Harasta, Jr.Stephen T. FaulkenberryRichard D. Bomba
    • Scott B. HardenbrookLouis P. Harasta, Jr.Stephen T. FaulkenberryRichard D. Bomba
    • B29C47/00B29C44/00B29C44/06B29C44/34B29C44/50B29C44/56B29K105/04B29C67/22
    • B29C44/5609B29C44/348B29C44/50B29C44/56
    • The present invention is directed to the continuous production of microcellular plastic web material having integral unmodified laminar skin. In accordance with the invention a web of plastic material impregnated with an inert gas is delivered continuously to a degassing device in which the degree to which gas diffuses out of the surfaces of the web can be selectively and continuously controlled, whereupon the web enters a foaming station where it is reheated to induce foaming. The temperature of the reheated web and the duration of the foaming process prior to quenching are also selectively controllable to produce the desired web characteristics. The gas-impregnated plastic web can be produced initially by any of several novel means including a continuous device for impregnating a previously formed web and several versions of die devices which operate either by rapidly quenching the extruded gas-impregnated plastic material before any significant foaming has occurred or by maintaining the material above its foaming pressure within the die until the material has cooled to below the temperature at which foaming occurs.
    • 本发明涉及连续生产具有整体未改性层状皮肤的微孔塑料网材料。 根据本发明,浸渍有惰性气体的塑料材料网被连续地输送到脱气装置,其中气体扩散出纸幅表面的程度可以选择性地和连续地受控制,于是纸幅进入发泡 它被重新加热以引发发泡。 再加热幅材的温度和淬火之前的发泡过程的持续时间也可选择性地控制以产生所需的纤维网特征。 气体浸渍的塑料网可以通过几种新颖的方法中的任何一种来生产,包括用于浸渍预先形成的网的连续装置和几种型式的模具装置,其通过在任何显着的起泡之前快速骤冷挤出的气体浸渍的塑料材料 发生或通过将材料保持在模具内的其发泡压力之下,直到材料已经冷却到低于发生发泡的温度。