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    • 51. 发明授权
    • Tubular film process
    • 管状膜工艺
    • US4472343A
    • 1984-09-18
    • US443724
    • 1982-11-22
    • Shinji KawamuraMasato Doi
    • Shinji KawamuraMasato Doi
    • B29C47/88B29F3/08
    • B29C47/8835B29C47/0026
    • A tubular film process wherein molten resin is extruded from an extrusion die into a tubular resin, blown by an internal pressure, cooling air is discharged at least at a point between the vicinity of the extrusion die and the vicinity of a bubble expansion ending point in a direction of the extrusion of the resin and in a direction opposite to the extrusion of the resin to, thereby cool the tubular resin, and the tubular resin is continuously taken up upon being cooled and solidified. The cooling air has higher flow rate in the extrusion direction. The cooling air is discharged not only in the direction of the extrusion of the resin but also in the direction opposite to the extrusion of the resin, whereby hot air stream is prevented from accompanying the flow of the resin, thus enabling to effectively cool the tubular resin.
    • 一种管状膜工艺,其中熔融树脂从挤出模头挤出成管状树脂,通过内部压力吹送,冷却空气至少在挤出模具附近和气泡膨胀终点附近的点处排出 树脂的挤出方向和与树脂的挤出相反的方向,从而冷却管状树脂,并且管状树脂在冷却和固化时被连续吸收。 冷却空气在挤出方向上具有较高的流速。 冷却空气不仅在树脂的挤出方向上而且在与树脂的挤出相反的方向上排出,从而防止伴随树脂流动的热空气流,从而能够有效地冷却管状 树脂。