Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Particular raw cellulosic materials
Patent
1997-11-07
2000-06-13
Nguyen, Dean T.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Particular raw cellulosic materials
162102, 162148, 1621576, 429249, 429255, D21F 1100, D21F 1114, D21F 2700
Patent
active
060745231
ABSTRACT:
Paper that has minute pores, denseness, a high degree of airtightness and is made from cellulose which has superior heat and chemical resistance and is reproducible natural resources. Further, a non-aqueous battery which is improved to a higher level with regards to various characteristics, e.g., heat resistance, electrical characteristics such as ion transmissivity or liquid-holding characteristics, or prevention of an internal short circuit, through use of, as a separator for electronically separating a positively active substance from a negatively active substance, a novel porous highly-airtightened separator which is made from cellulose and has pores and denseness. The separator is manufactured from highly-airtightened porous paper having minute pores made by forming wet paper web from minute cellulose having a fiber diameter of 1 .mu.m or less, and drying the wet paper web while voids in the wet paper web are maintained. The separator is used in a non-aqueous battery or electrolytic capacitor. More specifically, cellulose whose fibers are beaten to a JIS-CSF value of 200 ml or less (where the JIS-CSF value is measured in accordance with JIS P8121) or cellulose whose fibers are beaten to a value of 700 ml or less measured by modified CSF (wherein 3 g of a sample is measured as 0.3 g of a sample by the method specified in JIS P8121) is used as the minute cellulose.
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Jinzenji Teruyuki
Mizobuchi Taiji
Nguyen Dean T.
Nippon Kodoshi Corporation
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