Liquid flowable porous filter membrane, filter cartridge and filter

The utility model relates to a liquid flowable porous filter membrane, a filter cartridge and a filter. The liquid flowable porous filter membrane is a liquid flowable porous polyethylene filter membrane which comprises two opposite sides and has an asymmetric pore structure; filter assemblies and filters comprising porous polyethylene filter membranes of this type; methods of making the porous polyethylene filter membranes, filter assemblies, and filters; and methods of filtering a fluid, such as a liquid chemical, using a porous polyethylene filter membrane, filter assembly, or filter to remove undesired materials from the fluid. 本实用新型涉及一种液体可流动多孔滤膜、一种滤筒和一种过滤器。所述液体可流动多孔滤膜是包括两个相对侧且具有不对称孔隙结构的液体可流动、多孔聚乙烯滤膜；包括此类型的多孔聚乙烯滤膜的过滤器组件和过滤器；制造所述多孔聚乙烯滤膜、过滤器组件和过滤器的方法；以及使用多孔聚乙烯滤膜、过滤器组件或过滤器过滤如液体化学物质的流体以从所述流体去除非所需材料的方法。