| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thin porous paper thin and excellent in piercing strength, small in maximum pore diameter and hardly causing a pin hall. SOLUTION: This thin porous paper comprises a para-aramid pulp having 20-250 ml freeness, a para-aramid short fiber having 0.8-3 d fiber size and 3-15 mm fiber length, and a heat hardenable resin, and has <=35μm thickness. The proportion of the para-aramid short fiber is 15-60 parts weight based on 100 parts weight total of the para-aramid fiber and the para-aramid pulp.
|
