On July 18, Cangzhou Mingzhu announced that the three production lines of the "105 million square meters of wet lithium-ion battery separator project" built by the company in two years have all completed trial production and have been officially put into operation. Not long ago, a number of listed companies such as Innovation Shares and Putailai announced that they would enter the field of lithium-ion battery separators on a large scale. This not only reflects the increasingly mature technology of the dia