用于超滤过程中的人工透膜。一般由高分子材料如：醋酸纤维素类、醋酸纤维素酯类、聚乙烯类、聚砜类及聚酰胺类等制成。一般预先制成管式、板面式、卷式、毛细管式等各种型式的膜组件，然后组装多个组件在一起应用，以增大过滤面积并便于维修。
Artificial permeable membrane for the ultrafiltration process. Generally made of polymer materials such as cellulose acetate, cellulose acetate ester, polyethylene, polysulfone and polyamide. Generally, various types of membrane components such as tube type, plate type, roll type, and capillary type are made in advance, and then multiple components are assembled together to increase the filtration area and facilitate maintenance.

超滤膜是一种用于超滤过程能将一定大小的高分子胶体或悬浮颗粒从溶液中分离出来的高分子半透膜。 以压力为驱动力，膜孔径为1～100nm，属非对称性膜类型。孔密度约10/cm，操作压力差为100～1000kPa，适用于脱除胶体级微粒和大分子，能分离浓度小于10%的溶液。 

Ultrafiltration membrane is a kind of semi-permeable membrane used in ultrafiltration process to separate macromolecular colloid or suspended particles of a certain size from the solution. With pressure as the driving force, the membrane pore size is 1 ~ 100nm, which belongs to the asymmetric membrane type. The pore density is about 10/cm, the operating pressure difference is 100 ~ 1000kPa, which is suitable for removing colloidal particles and macromolecules, and can separate the solution with a concentration of less than 10%.