Abstract: A barrier paper includes a paper base material and a barrier layer containing cellulose fibers formed on the paper base material, in which an integrated value from 10.0 ?m to 500.0 ?m, obtained from a volume-based particle size distribution diagram when a dispersion containing the cellulose fibers is measured by laser diffraction, is 30% or more.

Abstract: A method for producing a laminated body including a base material and a coating layer laminated on the base material, includes: applying a coating liquid containing cellulose nanofibers onto the base material composed of at least acid-resistant paper, thereby forming the coating layer. In addition, an average fiber diameter of the cellulose nanofibers is 2 nm or more and 2000 nm or less, a content of the cellulose nanofibers in the coating liquid is 10 mass % or more of solid contents of the coating liquid, and a coating amount of the coating layer is 0.2 g/m2 or more in dry mass.

Abstract: A paper cup includes barrier paper, the barrier paper including at least a paper base material, a reinforcing layer containing cellulose nanofibers which is formed on the paper base material, and a sealant layer formed on the reinforcing layer, in which after the paper cup is caused to free-fall 5 times towards a concrete floor surface from a height of 1 m with the bottom portion being disposed downward, the paper cup has a buckling strength of 350 N or more in a case of being sandwiched between two parallel plate surfaces and compressed in a height direction of the body portion, and has a lateral pressing strength of 4 N or more in a case where the body portion is pressed by 10 mm at a ? height, from a bottom, of the entire height of the paper cup.

Abstract: A method for producing a laminated body including a base material and a coating layer laminated on the base material, includes: applying a coating liquid containing cellulose nanofibers onto the base material composed of at least acid-resistant paper, thereby forming the coating layer. In addition, an average fiber diameter of the cellulose nanofibers is 2 nm or more and 2000 nm or less, a content of the cellulose nanofibers in the coating liquid is 10 mass % or more of solid contents of the coating liquid, and a coating amount of the coating layer is 0.2 g/m2 or more in dry mass.

Abstract: A barrier paper includes a paper base material and a barrier layer containing cellulose fibers formed on the paper base material, in which an integrated value from 10.0 ?m to 500.0 ?m, obtained from a volume-based particle size distribution diagram when a dispersion containing the cellulose fibers is measured by laser diffraction, is 30% or more.

Abstract: A paper cup includes barrier paper, the barrier paper including at least a paper base material, a reinforcing layer containing cellulose nanofibers which is formed on the paper base material, and a sealant layer formed on the reinforcing layer, in which after the paper cup is caused to free-fall 5 times towards a concrete floor surface from a height of 1 m with the bottom portion being disposed downward, the paper cup has a buckling strength of 350 N or more in a case of being sandwiched between two parallel plate surfaces and compressed in a height direction of the body portion, and has a lateral pressing strength of 4 N or more in a case where the body portion is pressed by 10 mm at a ? height, from a bottom, of the entire height of the paper cup.

Abstract: Disclosed is a material that effectively utilizes natural resources and is friendly to the environment as a whole. Specifically, disclosed is a barrier material that has excellent strength and excellent affinity and adhesion to a paper base due to an interaction with paper fibers and that gives sufficient barrier properties even in the form of a thin film. A laminated body (100) includes, on at least one surface of a base (1) made of paper, a fiber layer (2) containing fine cellulose fibers each having a fiber diameter of 1 nm or more and 10 ?m or less. In particular, the fine cellulose fibers preferably have a fiber diameter of 1 nm or more and 30 nm or less.

Abstract: A method of manufacturing a fine cellulose fiber dispersion liquid includes: an oxidation process in which a cellulose is subjected to an oxidation treatment to obtain an oxidized cellulose; and a dispersion process in which the oxidized cellulose obtained in the oxidation process is subjected to a dispersion treatment in a water-based medium in which a pH thereof is adjusted to 4 to 12 using either an ammonia water or an organic alkali to obtain the fine cellulose fiber dispersion liquid.

Abstract: A method of manufacturing a fine cellulose fiber dispersion liquid includes: an oxidation process in which a cellulose is subjected to an oxidation treatment to obtain an oxidized cellulose; and a dispersion process in which the oxidized cellulose obtained in the oxidation process is subjected to a dispersion treatment in a water-based medium in which a pH thereof is adjusted to 4 to 12 using either an ammonia water or an organic alkali to obtain the fine cellulose fiber dispersion liquid.

Abstract: Disclosed is a dispersion liquid containing fine cellulose fiber capable of uniform dispersion in an organic solution or resin and capable of use in electronic components. Further disclosed are a laminate body and a cellulose film obtained from fine cellulose fibers with improved water resistance. Further disclosed are a fine cellulose fiber dispersion liquid which forms a film as an undercoat of a base material, in particular of a base material made from naturally occurring materials such as polylactic acid, wherein said film has an improved adhesiveness with respect to said base material; and a laminate body using the same. The fine cellulose fiber dispersion liquid contains at least fine cellulose fibers, and either an ammonia or an organic alkali.

Abstract: The present invention provides a formed article, or more specifically a transparent substrate, which effectively utilizes a natural stuff and which has a low linear expansion coefficient, a high light transmittance and an appropriate level of moisture permeability. The transparent substrate includes at least an oxidized polysaccharide and has a linear expansion coefficient of 50 ppm/° C. or less at 30-150° C. and a light transmittance of 70% or more at 660 nm. Its manufacturing method includes an oxidation process in which cellulose reacts with TEMPO or its derivatives as a catalyst to be oxidized in water under the presence of a co-oxidant, along with a fiberizing process in which the oxidized cellulose is fiberized in water to form a cellulose fiber, and a substrate-forming process in which a transparent substrate is formed from a cellulose dispersion liquid containing the cellulose fiber.

Abstract: The present invention provides a formed article, or more specifically a transparent substrate, which effectively utilizes a natural stuff and which has a low linear expansion coefficient, a high light transmittance and an appropriate level of moisture permeability. The transparent substrate includes at least an oxidized polysaccharide and has a linear expansion coefficient of 50 ppm/° C. or less at 30-150° C. and a light transmittance of 70% or more at 660 nm. Its manufacturing method includes an oxidation process in which cellulose reacts with TEMPO or its derivatives as a catalyst to be oxidized in water under the presence of a co-oxidant, along with a fiberizing process in which the oxidized cellulose is fiberized in water to form a cellulose fiber, and a substrate-forming process in which a transparent substrate is formed from a cellulose dispersion liquid containing the cellulose fiber.

Abstract: Disclosed is a dispersion liquid containing fine cellulose fiber capable of uniform dispersion in an organic solution or resin and capable of use in electronic components. Further disclosed are a laminate body and a cellulose film obtained from fine cellulose fibers with improved water resistance. Further disclosed are a fine cellulose fiber dispersion liquid which forms a film as an undercoat of a base material, in particular of a base material made from naturally occurring materials such as polylactic acid, wherein said film has an improved adhesiveness with respect to said base material; and a laminate body using the same. The fine cellulose fiber dispersion liquid contains at least fine cellulose fibers, and either an ammonia or an organic alkali.

Abstract: Disclosed is a material that effectively utilizes natural resources and is friendly to the environment as a whole. Specifically, disclosed is a barrier material that has excellent strength and excellent affinity and adhesion to a paper base due to an interaction with paper fibers and that gives sufficient barrier properties even in the form of a thin film. A laminated body (100) includes, on at least one surface of a base (1) made of paper, a fiber layer (2) containing fine cellulose fibers each having a fiber diameter of 1 nm or more and 10 ?m or less. In particular, the fine cellulose fibers preferably have a fiber diameter of 1 nm or more and 30 nm or less.