PP and PBT melt —blown nonwoven have been applied widely in blood filter but the filtering efficiency is low due to their poor hydrophilicity, then the modifications of nonwoven are necessary.

PP及PBT熔喷非织造布在血液过滤方面有广泛的应用，但其吸水性较差，从而影响了过滤效果。

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But the intrinsic error exists in PP model for the effect of the data link layer and physical layer, and the incorrect result is obtained by filter algorithm when the network load is heavy.

由于受数据链路层和物理层的影响，PP测量模型本身存在着固有的测量误差；当网络负载较重时，PP测量模型就不能够通过过滤算法得出正确的测量结果。

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At present, the main cigarette filtrational material is cellulose acetate tow and PP tow. The development of paper filter tip using sepiolite as cigarette filtrational material is discussed.

目前，卷烟滤嘴材料主要是醋酸纤维丝束和聚丙烯丝束。介绍了以海泡石为卷烟滤嘴材料的纸质滤嘴的开发前景。

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