公开(公告)号：US3847676A

公开(公告)日：1974-11-12

申请号：US31710872

申请日：1972-12-21

Applicant: GRACE W R & CO

Inventor： PALMER N ,  SUGARMAN N ,  GRAMMER D

IPC: D04H3/16 ,  H01M2/14 ,  H01M2/16 ,  H01M3/02

CPC classification number: D04H3/16 ,  H01M2/14 ,  H01M2/16

Abstract: Battery separators and the like are produced from nonwoven mats of plastic fibers which fibers contain an internal surfactant that is soluble in the molten polymer but insoluble in the cooled polymer and tends to bloom under conditions of use. A second surfactant is coated on the exterior of the fiber. After preliminary formation the nonwoven mat is heated and then compressed to increase the effectiveness of the internal surfactant in cooperation with the coated on surfactant. The fibers may be formed from polypropylene resin that is treated at unusually high temperatures prior to extrusion and the extrudate attenuated, collected on a drum and compressed to form a preferred separator with small pores and high porosity.

Abstract translation: 电池分离器等由塑料纤维的非织造垫制成，该纤维含有可溶于熔融聚合物但不溶于冷却的聚合物中的内部表面活性剂，并且在使用条件下容易开花。 第二种表面活性剂涂覆在纤维的外部。 在初步形成之后，非织造毡被加热然后被压缩以增加与涂覆的表面活性剂配合的内部表面活性剂的有效性。 纤维可以由聚丙烯树脂形成，其在挤出之前在非常高的温度下处理并且挤出物减弱，收集在滚筒上并压缩以形成具有小孔和高孔隙率的优选隔板。