| 摘要 |
PROBLEM TO BE SOLVED: To provide a co-extruded, multi-layered battery separator having homogeneous physical properties.SOLUTION: A battery separator comprises a co-extruded, microporous membrane having at least two layers made of extrudable polymers and having a uniform thickness defined by a standard deviation less than 0.80 microns (μm). Alternatively, the battery separator comprises a co-extruded, microporous membrane having at least two layers made of extrudable polymers and having an interply adhesion defined by a peel strength exceeding 60 grams. |
