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    • 10. 发明授权
    • Process for pelletizing ultra-high melt flow polymers
    • 造粒超高熔体流动聚合物的方法
    • US06426026B1
    • 2002-07-30
    • US09473532
    • 1999-12-28
    • Marios AvgoustiEdward Allen LeachAlex Kharazi
    • Marios AvgoustiEdward Allen LeachAlex Kharazi
    • B29C4778
    • B29B9/06B29C47/0011B29C47/822B29C47/8895B29C2035/1616B29K2023/06B29K2023/12
    • Disclosed is a process for pelletizing high melt flow crystalline polymers to produce crystalline pellet products. The process includes feeding a polyolefin granular or pelleted polymer into a melting/mixing mechanism to provide a molten polymer material. The molten polymer material is optionally passed through a melt pump and through a die to form a plurality of molten polymer strands. The plurality of molten polymer strands then are passed through or along a water trough declined with respect to the direction of the horizontal arrays where they are sprayed with cool liquid a plurality of times in such a manner that the sprayed cool liquid creates turbulent flow and disturbs a thin film of hot water and/or steam that forms around each molten polymer strand as it is cooled without undesirable axial acceleration of the polymer strands. Subjecting the molten polymer strands to such a cooling procedure produces cooled polymer strands, which then are fed to a cutting mechanism and cut into pellets. The process produces ultra high melt flow crystalline polymer pellets which are uniformly compounded.
    • 公开了一种用于造粒高熔体流动结晶聚合物以制备结晶颗粒产品的方法。 该方法包括将聚烯烃颗粒状或颗粒状聚合物进料到熔融/混合机构中以提供熔融聚合物材料。 熔融聚合物材料任选地通过熔体泵并通过模具以形成多个熔融聚合物股线。 然后,多个熔融聚合物链通过或沿着水槽相对于水平阵列的方向下降,其中它们以冷液体喷射多次,使得喷射的冷液体产生湍流和干扰 在每个熔融聚合物股线周围形成的热水和/或蒸汽的薄膜,因为它被冷却而不会有不希望的聚合物股线的轴向加速。 使熔融的聚合物链条经受这种冷却程序产生冷却的聚合物股线,然后将其送入切割机构并切割成粒料。 该方法产生均匀混合的超高熔体流动结晶聚合物颗粒。