| 摘要 |
A new and improved battery separator takes the form of a porous absorbent nonwoven fibrous web of water dispersible fibers that incorporates up to 65% by weight of fibers having a high cross-sectional aspect ratio, i.e. a significantly greater width than thickness in the dry fibrous web material. The fibers are uniformly distributed throughout the web material and anchored therein with the help of a suitable synthetic binder. The high cross-sectional aspect fibers include, inter alia, collapsible hollow fibers and ribbon fibers. The high cross-sectional aspect fibers when combined with lower denier solid fibers also provide a synergistic reduction in shrinkage. |
