| 专利名称 | POLYPROPYLENE MICROPOROUS FILM | 申请号 | US19910786090 | 专利类型 | US | 公开（公告）号 | US5134174 | 公开（授权）日 | 1992.07.28 | 申请（专利权）人 | 中国科学院化学研究所 | 发明（设计）人 | XU MAO (CN); HU SHIRU (CN); GUAN JIAYU (CN); SUN XIANMING (CN); WU WEI (CN); ZHU WEI (CN); ZHANG XIAN (CN); MA ZIMIAN (CN); HAN QI (CN); LIU SHANGQI (CN) | 主分类号 | B29C49/08 | IPC主分类号 | B29C49/08;B29C55/00 | 专利有效期 | POLYPROPYLENE MICROPOROUS FILM 至POLYPROPYLENE MICROPOROUS FILM | 法律状态 | 说明书摘要 | Polypropylene microporous films characterized by having a porosity of 30-35%, an average pore size of 200-800 Angstroms, a permeation coefficient for nitrogen of 1-5x10-3 ml/cm sec atm and a tensile strength of greater than 60 MPA in all directions within the film plane are prepared by the consecutive steps of biaxial stretching a non-porous starting film of high beta -crystal content and heat setting the stretched film. |
1、源头对接，价格透明
2、平台验证，实名审核
3、合同监控，代办手续
4、专员跟进，交易保障