THIN POROUS PAPER

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...

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Bibliographic Details
Main Authors UENO HIROYOSHI, IKEDA HIDEKI, TOYOSHIMA SETSUO
Format Patent
LanguageEnglish
Published 04.11.1998
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
SEPARATION
TEXTILES
TRANSPORTING
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Summary: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 <=35 μm 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.
Bibliography:Application Number: JP19970097249