Filter membrane

The utility model is suitable for a filtration instrument technical field provides a filter membrane, including the first micropore filter membrane of first layer and the second micropore filter membrane of the second floor, first micropore filter membrane with the stack of second micropore filter membrane, first micropore filter membrane's filtration pore pore size is 1 micron to 8 microns, second micropore filter membrane's filtration pore pore size is 0.22 micron or 0.45 micron. The utility model provides a filter membrane adopts bilayer structure, hinders the large granule in the first micropore filter membrane of first layer when filtering, and the tiny particle hinders in the second micropore filter membrane of the second floor, the difficult jam, and filtration efficiency is high moreover, has saved filtering time greatly. 本实用新型适用于过滤工具技术领域，提供了种滤膜，包括第层的第微孔滤膜和第二层的第二微孔滤膜，所述第微孔滤膜和所述第二微孔滤膜叠加；所述第微孔滤膜的滤孔孔径大小为1微米至8微米，所述第二微孔滤膜的滤孔孔径大小为0.22微米或0.45微米。本实用新型提供的滤膜采用双层结构，在过滤时将大颗粒阻于第层的第微孔滤膜，小颗粒阻于第二层的第二微孔滤膜，不易堵塞，而且过滤效率高