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PRODUCTION OF POLYETHYLENE POROUS HOLLOW YARN MEMBRANE
PRODUCTION OF POLYETHYLENE POROUS HOLLOW YARN MEMBRANE
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机译:聚乙烯多孔中空膜的生产
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摘要
PURPOSE: To obtain a porous polyethylene hollow yarn membrane efficiently holding stable high draw ratio, high in circular opening ratio and large in pore diameter by melt-spinning polyethylene with a nozzle for producing hollow yarn, cold-drawing after annealing and next, hot-drawing under a specific temp. range, draw stages and deformation rate distribution. ;CONSTITUTION: The polyethylene is melt-spinned with the nozzle for producing hollow yarn. The usable polyethylene is preferably few in branch, high and at least ≥0.960g/cm3 in density and 0.05-6.0 in M1 value. The obtained undrawn yarn is cold-drawn after annealed and next, hot-drawn. The hot-drawing is executed at 100-130°C with ≥3 hot-draw stages at a deformation rate, larger than that of the preceding stage and ≥1.5 times as much as the average deformation rate in the final deformation rate. Thus, the porous hollow yarn membrane extremely large in fine pore ratio and circular opening ratio is stably, easily and efficiently obtained.;COPYRIGHT: (C)1995,JPO
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机译:用途:通过使用生产中空纱的喷嘴将聚乙烯熔融纺丝,退火后进行冷拉伸,然后进行热拉伸,以获得高效率,稳定地保持稳定的高拉伸比,高圆形开口率和大孔径的多孔聚乙烯中空丝膜。在特定温度下绘图。范围,绘制阶段和变形率分布。 ;组成:将聚乙烯与喷嘴熔融纺丝以生产中空纱。可用的聚乙烯最好是支链少,高并且密度至少为≥0.960g/ cm 3 Sup>并且M1值为0.05-6.0。退火后,将得到的未拉伸丝进行冷拉伸,然后进行热拉伸。热拉伸是在100-130°C下以≥3个热拉伸阶段进行的,变形速率大于前一阶段的变形速率,并且是最终变形速率中平均变形速率的≥1.5倍。因此,稳定,容易且有效地获得了细孔率和圆形开口率极大的多孔中空丝膜。版权所有:(C)1995,日本特许厅
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