| 摘要 |
Porous crystalline polypropylene is used as a battery separator. In an example, polypropylene powder, prepared and purified so as to give a crystalline product, was placed in a mould, lightly compressed and heated to 215 DEG -225 DEG F. Specification 917,500 is referred to.ALSO:Porous crystalline polypropylene is used as a battery separator. In an example, polypropylene powder, prepared and purified so as to give a crystalline product, was placed in a mould, lightly compressed and heated to 215-225 DEG F. Specification 917,500 is referred to. |
