Abstract:
PROBLEM TO BE SOLVED: To provide a gas-barrier molded article having high permeation barrier properties against an oxygen gas, water vapor and the like. SOLUTION: The gas-barrier molded article has a cellulose fiber layer having a cross-linked structure formed on the surface of a molding serving as a base material. The cellulose fiber layer having the cross-linked structure is formed by the reaction of cellulose fibers and a cross-linking agent having a reactive functional group. The cellulose fibers contain cellulose fibers having an average fiber diameter of 200 nm or less, wherein cellulose that constitutes the cellulose fibers has a carboxy group content of 0.1 to 2 mmol/g. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of easily and accurately quantitatively determining an additive that is contained in a fiber sheet and made of polymeric material having an anion-based functional group. SOLUTION: The fiber sheet to be measured is dipped in aqueous solution containing polyvalent metal ions, and the polyvalent metal ions are bonded to the anion-based functional group in an anion-based additive contained in the fiber sheet. The fiber sheet is pulled up from the aqueous solution, and excessive polyvalent metal ions are cleared and removed. The amount of the polyvalent metal ions bonding to the anion-based functional group in the additive is measured, and the amount of the additive contained in the fiber sheet is calculated based on the measured value, the molecular weight of the additive, and the content of the anion-based functional group per formula weight or unit weight. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a gas barrier material from which a formed body having high gas barrier properties against oxygen or the like can be obtained. SOLUTION: The gas barrier material contains cellulose fibers having an average fiber diameter of not larger than 200 nm. The cellulose constituting the cellulose fibers has a carboxyl group content of 0.1-2 mmol/g. By coating a base with the gas barrier material and drying the coated base, there can be obtained a gas barrier composite body having high oxygen barrier properties and the like. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a composite material having practically sufficient mechanical strength with little load to the environment. SOLUTION: The composite material is obtained by mixing micro cellulose fibers having a 0.1-3 mmol/g carboxyl group content with a moldable polymer material selected from the group consisting of polymers derived from biomass and polymers derived from petroleum. As the polymer derived from the biomass, a polylactic acid or pulp is preferable. The content of the fine cellulose fibers is preferably 0.01-60 mass%. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a suspension of cellulose fibers, which is suitable for producing a gas barrier film restraining the permeation of various gases such as oxygen, water vapor, carbon dioxide, nitrogen and limonene. SOLUTION: The suspension of cellulose fibers contains cellulose fibers, which have ≤200 nm average fiber diameter, the cellulose of which has 0.1-2 mmol/g carboxy group content and which contain the metal selected from a polyvalent metal and a monovalent metal (excluding sodium alone) for forming a counter ion of the carboxy group. The polyvalent metal or monovalent metal for forming the counter ion is preferably selected from cobalt, magnesium, calcium, aluminum and silver. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a paper-making flocculant which can exhibit a high flocculation force, when paper is made. SOLUTION: The paper-making flocculant includes cellulose fibers, wherein the cellulose fibers have an average fiber diameter of ≤200 nm, and the carboxyl group content of the cellulose comprising the cellulose fibers is 0.1 to 2 mmol/g. COPYRIGHT: (C)2010,JPO&INPIT