Abstract: A water-dispersible composite structure, which comprises one or more layers, and a method of producing the same. At least a part of the layers is formed by a fibrous web or sheet containing 50-90 parts by weight of wood fibers and 10-90 parts by weight of annual or perennial plant fibers and/or 10-50 parts by weight of synthetic short-cut fibers, and 0.1-20% by weight of a binder, calculated from the weight of the fibers, and at least a part of the binder being a water-soluble polymer and another part a water dispersible binder, and the fibrous sheet or web being produced by wet forming. By means of the invention, the fibers of the composite structure can be recovered and recycled by equipment conventionally used in the paper and paperboard industry.

Abstract: A sheet producing method includes a web forming step of forming a web by accumulating fiber in a dry system, a water providing step of providing the web with water, and a compression-heating step of compressing and simultaneously externally heating the web provided with water, wherein a water content of the web provided with water in the water providing step is 12% by mass or more, and a compression degree of the web between before and after the compression-heating step is 1/7 or less.

Abstract: There is provided a fiber body manufacturing method including an accumulating step of forming the web by accumulating a material containing fibers and starch or dextrin on the first transport belt by a dry method; a transport step of transporting the web by peeling off a first surface of the web from the first transport belt, and by bringing a second surface of the web, which is a surface opposite to the first surface peeled off from the first transport belt, into contact with the second transport belt; a water-applying step of applying the water to the web which is in contact with the first transport belt or the second transport belt; and a heating step of heating the web by bringing the heating section into contact with the web peeled off from the second transport belt, and forming a fiber body by binding the fibers with the starch or dextrin, in which the web peeled off from the second transport belt is directly supplied to the heating section.

Abstract: A formed body producing method including an accumulating step of accumulating a mixture including fiber and starch, a humidifying step of providing the accumulated mixture with water, and a forming step of obtaining a formed body by heating and pressurizing the mixture provided with water, wherein a gelatinization temperature of the starch is 60° C. or lower.

Abstract: An oil-resistant agent for paper, which contains a non-fluorine copolymer that has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group with 7-40 carbon atoms and a repeating unit formed from (b) an acrylic monomer having a hydrophilic group. The oil-resistant agent for paper also contains a liquid medium that is composed of water and/or an organic solvent, preferably of water or a mixture (aqueous medium) of water and an organic solvent. The non-fluorine copolymer preferably has a repeating unit formed from (c) a monomer having an ion donor group in addition to the repeating units formed from the monomers (a) and (b). Also disclosed is an oil-resistant paper having an oil-resistant layer including the oil-resistant agent for paper, and starch or modified starch, on a surface of the paper as well as a method of treating paper.

Abstract: Disclosed is an environmentally-friendly method for enhancing mechanical properties of a high antibacterial nano dialysis paper for medical protection, includes following steps: a, preparing pulp components, and taking 40-60 parts of hardwood pulp, 10-20 parts of polyvinyl alcohol fiber, 30-50 parts of softwood pulp, 10-20 parts of cellulose fiber by mass; b, putting the hardwood pulp, the polyvinyl alcohol fiber, the softwood pulp and the cellulose fiber into a beater for beating to make a pulp, and then adding modified chitosan accounting for 1-5% of a weight of the pulp into the pulp, and defibering for 10-20 minutes at a rotating speed of 1500-2000 revolutions per minute in a defibrator; and c, carrying out papermaking with the pulp after defibering to form a dialysis paper finished product.

Abstract: Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.

Abstract: A method for controlling a fiber fractionation system for fractionating an input material into a long fraction (LF) stream comprising LF fibers and a short fraction (SF) stream comprising SF fibers includes measuring an average LF fiber length at one or more locations post-fractionation, and maintaining the average LF fiber length within a target variability range by automatically altering a rotational speed of a rotor of the fiber fractionation system.

Abstract: A method for manufacturing a paper barrier base material includes a step of applying a water vapor barrier layer coating liquid that contains at least a water vapor barrier resin and a pigment onto a paper base material by a curtain coating method to form a water vapor barrier layer, and a step of applying a gas barrier layer coating liquid that contains at least one polymer selected from water-soluble polymers and water-dispersible polymers onto the water vapor barrier layer by a curtain coating method without a drying step interposed between the two steps to form a gas barrier layer. The gas barrier layer coating liquid has a B-type viscosity equal to or higher than a B-type viscosity of the water vapor barrier layer coating liquid. The method is intended to suppress the occurrence of coating unevenness in wet-on-wet coating by a curtain coating method.

Abstract: A process for manufacturing a web material is disclosed. The process generally provides the steps of: a. providing a pulp material comprising fibers and vessels; b. separating said vessels from said fibers to form an accepts stream and a rejects stream; c. forming plies with the rejects and accepts streams; and d. joining the plies.

Abstract: A fire-resistant retail product packaging, such as sleeves, pouches, wraps, and the like, that is capable of containing fires of high intensity for products such as lithium-ion batteries. The fire-resistant paper comprises Kraft paper with a preferred eight of 40 to 60 pounds/3,000 ft2, and a fire-resistant ink applied to each side of the Kraft paper. The fire-resistant ink includes an acrylic resin, a dispersant, and a boron compound, and optionally, talc and a molybdate compound. When heated, the fire-resistant ink preferably converts the Kraft paper into a non-combustible and heat shielding substance.

Abstract: The present invention relates to multi-layer fiber products and a method of manufacturing these kinds of products. The present product comprises a first layer consists mainly of natural fibers and a second, heat-sealing layer located on top of the first layer. The heat-sealing layer consists mainly of synthetic thermoplastic fibers or particles. According to the present method, the heat-sealing layer is brought onto the first layer already during the web forming process, the first and the second layers being formed and joined together in a foam forming process. With the present invention, it is possible to decrease the amount of plastic materials in packaging materials having heat-sealing properties.

Abstract: A pulp transportation system is adapted for transporting a pulp among a pulp-supply machine and a plurality of forming machines, and includes a pump unit, a first pipe unit, a second pipe unit and a valve unit. The pump unit is adapted for urging the pulp to flow. The valve unit is operable to control flow of the pulp through the first pipe unit and the second pipe unit, such that the flow of the pulp is convertible between a pulp-supply state, in which the pulp flows out from the pulp supply machine into at least one of the forming machines, and a pulp-return state, in which the pulp flows out from at least one of the forming machines into the pulp supply machine.

Abstract: Methods for producing biodegradable and recyclable barrier paper laminate comprising an inorganic barrier layer against permeation.

Abstract: An airlaid substrate includes at least one bicomponent fiber having a first region and a second region. The first region includes polypropylene and the second includes a blend of an ethylene-base polymer and an ethylene acid copolymer. The ethylene-base polymer has a density from 0.920 g/cm3 to 0.970 g/cm3 and a melt index (I2) from 0.5 g/10 min to 150 g/10 min. The ethylene acid copolymer includes the polymerized reaction product of from 60 wt % to 99 wt % ethylene monomer and from 1 wt % to 40 wt % unsaturated dicarboxylic acid comonomer, based on the total weight of the monomers in the ethylene acid copolymer. The ethylene acid copolymer having a melt index (I2) from 0.5 g/10 min to 500 g/10 min.

Abstract: A pulp mold includes a mold main body extending along a longitudinal axis and having an inner surface that defines a chamber, an outer surface opposite to the inner surface, and a plurality of channel grooves extending inwardly from the outer surface toward the inner surface and extending along a length of the outer surface. The chamber is divided into a plurality of chamber sections decreasing in diameters gradually and upwardly from the opening along the longitudinal axis. Each channel groove does not communicate with the chamber. A plurality of air holes extend from the outer surface to the inner surface, pass through the channel grooves, and communicate the chamber with the outside.

Abstract: In a first step, a molding die is immersed in a raw liquid including cellulosic fibers. Then, the liquid of a raw liquid is sucked through a net material by a liquid suction part, so as to cause the cellulosic fibers to be laminated on the net material. In the second step, the cellulosic fibers laminated on the net material are dried, so as to form a protrusion. In the third step, the dried protrusion and the communication part are removed from the molding die. A passage part of the communication part is formed at a position where a projection portion had been arranged, the passage part being configured to communicate an inside of the protrusion with an outside of the protrusion.

Abstract: An object is to provide a water-dispersible paper that exhibits excellent dispersibility in water. As a solution, a water-dispersible paper is provided, which has: a base paper that has a bulky layer containing 10% by weight or higher of a softwood pulp with a lumen width (l) to fiber diameter (D) ratio (l/D) of 0.60 or lower on average; and a water-soluble polymer impregnated into the base paper.

Abstract: The present invention relates to a polymer composition comprising an anionic polymer composite having a synthesized polymer portion and a polysaccharide portion, obtainable by polymerizing vinyl monomers in the presence of the polysaccharide. The present invention further relates to a strength system and methods of production and use in providing a paper product.

Abstract: The present invention relates to a method of determining the moisture content of a web of cellulose pulp arriving at a pulp dryer. The method comprises measuring, at several instants during a predetermined time interval, the moisture content of said web using a moisture sensor arranged upstream of the pulp dryer; measuring state variables of drying medium of said pulp dryer; calculating, based on said moisture sensor measurements, a total value of moisture introduced into the pulp dryer by a portion of said web during said predetermined time interval; determining, based on said measured state variables, a predicted total value of moisture present inside the pulp dryer; comparing said calculated total value with said predicted total value to obtain a deviation therebetween; calibrating said moisture sensor using said deviation; and measuring the moisture content of a web of cellulose pulp using said calibrated moisture sensor.