abstract |
The invention provides a polyolefin microporous membrane, which has a degree of crystallinity of 65-85% when measured by DSC, a proportion of lamellae in crystals of 30-85%, a crystal length of 5nm-50nm, and an amorphous length of 3nm-30nm. . The invention also provides a polyolefin microporous membrane, which has a crystal size of 12.5nm-13.5nm and a crystallinity of 64-68% when measured by X-ray diffraction. |