| 摘要 |
The present invention discloses a separator for an electrochemical element which comprises wet nonwoven fabric containing fibrillated cellulose, non-fibrillated fiber, and fibrillated heat-resistant fiber having all of a softening point, a melting point and a thermal decomposition temperature of 250°C or higher and 700°C or lower, and dimensional change rates of MD and CD subjected the wet nonwoven fabric to heat treatment at 250°C for 50 hours of each -3% to +1%. |
