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CHITIN NANOFIBER DISPERSION PLASTICIZER, MANUFACTURING METHOD OF POLYOLEFIN MICROPOROUS STRETCHED FILM CONTAINING CHITIN NANOFIBER, CHITIN NANOFIBER COMPOSITE PORE FILM AND SEPARATOR FOR NONAQUEOUS SECONDARY BATTERY
CHITIN NANOFIBER DISPERSION PLASTICIZER, MANUFACTURING METHOD OF POLYOLEFIN MICROPOROUS STRETCHED FILM CONTAINING CHITIN NANOFIBER, CHITIN NANOFIBER COMPOSITE PORE FILM AND SEPARATOR FOR NONAQUEOUS SECONDARY BATTERY
PROBLEM TO BE SOLVED: To provide a chitin nanofiber composite separator having especially improved piercing strength and heat resistance of mechanical and thermal characteristics required as a separator for nonaqueous secondary battery (lithium ion battery) at high quality and low cost.SOLUTION: There is provided a chitin nanofiber dispersion plasticizer, a manufacturing method of a polyolefin microporous stretched film containing a chitin nanofiber, chitin nanofiber composite porous film and a separator for nonaqueous secondary battery are methods and constitutions for using a chitin nanofiber dispersion plasticizer by uniformly dispersing a chitin nanofiber having fiber diameter of 5 nm to 1 μm in a plasticizer having molecular weight of 100 to 1000 by fibrillation treatment means after an acetylation treatment of at least chitins of carb or lobster.SELECTED DRAWING: Figure 4
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