METHOD FOR PRODUCING COMPOSITE POROUS SHEET OF MICROFIBROUS CELLULOSE

• Main Authors: KAWAMUKAI TAKASHI, NOISSHIKI YASUTOMO, TSUNODA MITSURU, OBARA YUSUKE
• Format: Patent
• Language: English
• Published: 21.06.2012
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; IMPREGNATING OR COATING OF PAPER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method for simply and efficiently producing a porous composite sheet of microfibrous cellulose.SOLUTION: The method for producing a porous composite sheet of microfibrous cellulose includes a preparation step of producing a mixed solution by mixing an aqueous suspension including microfibrous cellulose with a polymer emulsion having film formability, a paper-making step of dehydrating the mixed solution by filtration on a porous base material to form a sheet including water, a step of replacing the sheet including water with an organic solvent, and a drying step of heat-drying the sheet replaced with organic solvent.