Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing a film body exerting high bas barrier properties in a high-humidity atmosphere and having excellent mechanical strength.SOLUTION: A film body to be produced contains fine cellulose fiber having a content of carboxy groups in cellulose of 0.1-3 mmol/g, a laminar inorganic compound and a polyacrylamide. The method of producing the film body includes a coating liquid preparation step of using a nonionic polyacrylamide as a polyacrylamide and mixing the nonionic polyacrylamide, the fine cellulose fiber, the laminar inorganic compound and a liquid medium together to prepare a coating liquid and a coating film formation and drying step of forming a coating film from the coating liquid and drying the coating film at drying temperatures of 80-250°C.
Abstract:
PROBLEM TO BE SOLVED: To provide an additive for modifying a resin suitably usable for producing a cellulose nanofiber composite molding where the cellulose nanofiber is highly dispersed in a resin.SOLUTION: This additive for modifying a resin includes a cellulose nanofiber obtained by making an N-oxyl compound to act on a natural cellulose fiber and/or the cellulose nanofiber derivative, and a resin particle. It is preferable that the cellulose nanofiber and/or the cellulose nanofiber derivative is present on the surface of the resin particle. It is preferable that a thermoplastic resin is used as the resin. The additive for modifying a resin is preferably produced by: preparing an emulsion containing cellulose nanofiber obtained by making an N-oxyl compound act on a natural cellulose fiber and/or a derivative of the cellulose nanofiber, a resin particle and a liquid medium; and removing the liquid medium from the emulsion by drying.
Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous dispersion which permits the manufacturing of a filmy material having high barrier properties against steam and oxygen.SOLUTION: This aqueous dispersion includes a fine cellulose fiber having a carboxyl-group content of 0.1-3 mmol/g, a layered inorganic compound, and a basic substance. The mass ratio (the basic substance/the layered inorganic compound) of the basic substance to the layered inorganic compound is preferably 0.001-10. The basic substance is preferably volatile matter. This aqueous dispersion can be suitably manufactured by mixing an aqueous dispersion, which contains the layered inorganic compound and the basic substance, with the fine cellulose fiber having a carboxyl-group content of 0.1-3 mmol/g.
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition including fine cellulose fibers and a resin, having practically sufficient mechanical strengths, and entailing a scarce coloration of the resin.SOLUTION: The resin composition of the present invention comprises: a fine cellulose fiber composite provided by coupling, via amide bonds, hydrocarbon groups with fine cellulose fibers; and at least one type of resin selected from the group consisting of polyolefin-based resins, polyvinyl chloride-based resins, polyamide-based resins, and polycarbonate-based resins. It is desirable for the hydrocarbon group to be either a hydrocarbon group having one carbon atom or a saturated or unsaturated, linear or branched hydrocarbon group having at least 2 and no more than 30 carbon atoms.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing of a gas barrier laminate that has high barrier properties to water vapor and oxygen.SOLUTION: The method for manufacturing of the gas barrier laminate includes: a first application step of applying a first liquid by which the carboxyl group content of a cellulose contains a fine cellulose fiber of 0.1-3 mmol/g in a base material; and a second application step of applying a second liquid that includes at least one kind selected from a group consisting of the cellulose fiber, as well as a laminar inorganic compound, a crosslinking agent, an inorganic metal salt, and an organic metal salt, on an applied part of the first liquid in the base material.
Abstract:
PROBLEM TO BE SOLVED: To provide a filmy material having high barrier performance to steam and oxygen. SOLUTION: The filmy material includes cellulose microfibers and a layered inorganic compound, wherein cellulose constituting the cellulose microfibers has a carboxyl group content of 0.1-3 mmol/g and the mass ratio of the layered inorganic compound to the cellulose microfibers (layered inorganic compound/cellulose fiber) is 0.01-100. Preferably, the mean particle diameter of the layered inorganic compound is 0.01-10 μm and the charge density thereof is 1-1,000 eq/g. COPYRIGHT: (C)2011,JPO&INPIT