Polyolefin porous membrane and preparation method thereof

• Main Authors: JIA PEILIANG, WANG ZHENGLI, SUN AIBIN, LIU TAOTAO, WENG XINGXING
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; ELECTRICITY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a polyolefin porous membrane and a preparation method thereof. In the preparation process of the membrane, through adjustment of a raw material formula and improvement of a processing technology, the prepared membrane microscopically has a specific crystal structure which is represented as a dendritic crystal structure, and the mechanical properties such as tensile strength and puncture strength of the polyolefin porous membrane can be improved; and by using the preparation method provided by the invention, the polyolefin porous membrane with excellent tensile propertycan be prepared. 本发明涉及一种聚烯烃多孔膜及其制备方法，在隔膜制备过程中通过原料配方的调整及加工工艺的改进，使所制备的隔膜在微观上具有特定的晶体结构，表现为枝状晶体结构，可以提高聚烯烃多孔膜的机械性能，如拉伸强度、穿刺强度等；使用本发明提供的制备方法可以制备出具有优秀拉伸性能的聚烯烃多孔膜。