A method for co-producing molded food-container pulp and fulvic acid from cotton stalk, which belongs to the field of comprehensive utilization of crop straw resources. The method adopts digesting, defibering and bio-treating measures to remove pectin and hemicellulose and other anionic waste generating sources in cotton straw raw materials to obtain a pulp with low beating degree; and retains part of lignin to help form oil-proof and waterproof film of a molded food-container and improves the stiffness and water filtration of the molded food-container and increases a yield of fiber pulp; adopts ammonium sulfite method to pulping to meet fiber requirements while obtaining fulvic acid.

The present invention relates to the fields of fibers and uses thereof such as for producing fiber webs, such as paper, board or tissue. Specifically, the invention relates to a method of monitoring and controlling cellulolytic activity in an aqueous cellulose fiber suspension or process water for a production method of a fibrous web containing cellulose fibers. Also, the present invention relates to a method of manufacturing a fibrous web, such as a paper, board, tissue or the like, and use of a biocide for controlling cellulolytic activity in an aqueous cellulose fiber suspension or in process water e.g. for a production method of a fibrous web containing cellulose fibers. Still, the present invention relates to a fibrous web, such as a paper, board, tissue or the like, an aqueous cellulose fiber suspension or process water for a production method of a fibrous web containing cellulose fibers, and a system for controlling cellulolytic activity in an aqueous fiber suspension or in process water.

Recycled pulp that derives from a used sanitary article includes an antibacterial activity value of 2.0 or more and an acid. Recycled pulp that derives from a used sanitary article includes an antibacterial activity value of 2.0 or more and an ash content of 0.65% by weight or less, and further includes an acid. The acid is a citric acid. The recycled pulp further includes a cationic antibacterial agent. The cationic antibacterial agent is a quaternary ammonium salt. The cationic antibacterial agent is a benzalkonium chloride or a cetylpyridinium chloride. At least a portion of the cationic antibacterial agent is adsorbed on the recycled pulp.

A separation device includes: a material supply section that supplies a material containing a fiber; a defibrating section that defibrates the material supplied from the material supply section; a separation section that includes a rotating member, a suction portion, and a collection section, the rotating member having a first surface and a second surface that are in a front and back relationship, being at least partially composed of a mesh, and to which a defibrated material generated in the defibrating section is supplied onto the first surface, the suction portion being provided on a side of the second surface of the rotating member and sucking the defibrated material via the mesh to remove foreign matter, the collection section collecting the defibrated material from which the foreign matter on the first surface has been removed; a weight detection section that detects a weight of the material supplied by the material supply section; and a controller that controls an operation of the separation section based on a detection result of the weight detection section.

A separation device includes: a defibrating section that defibrates a material containing a fiber; and a separation section that includes a rotating member, a first ejection portion, a first suction portion, a second ejection portion, and a second suction portion, the rotating member being at least partially composed of a mesh, the first ejection portion ejecting a defibrated material generated in the defibrating section onto a first surface, the first suction portion sucking the defibrated material via the mesh to remove foreign matter, the second ejection portion having a second ejection port that ejects air toward the defibrated material from which the foreign matter on the first surface has been removed, the second suction portion sucking and collecting the defibrated material peeled off from the mesh by the air ejected from the second ejection port, in which the second ejection portion includes a nozzle having a first portion and a second portion, the first portion being a portion in which a cross-sectional area of a lumen decreases toward the second ejection port, the second portion being provided on an opposite side of the first portion to the second ejection port and being a portion in which the cross-sectional area of the lumen is larger than an opening area of the second ejection port and is constant along a tube axis.

A fiber body manufacturing apparatus includes: a material supply section that supplies a material containing a fiber; a defibrating section that defibrates the material supplied from the material supply section; a separation section that includes a rotating member, a suction portion, and a collection section, the rotating member having a first surface and a second surface that are in a front and back relationship, being at least partially composed of a mesh, and to which a defibrated material generated in the defibrating section is supplied onto the first surface, the suction portion being provided on a side of the second surface of the rotating member and sucking the defibrated material via the mesh to remove foreign matter, the collection section collecting the defibrated material from which the foreign matter on the first surface has been removed; an accumulation section that accumulates the defibrated material from which the foreign matter has been removed; a forming section that forms an accumulated material generated in the accumulation section; a thickness detection section that detects a thickness of a sheet formed by the forming section; and a controller that controls an operation of the separation section based on a detection result of the thickness detection section.

A method for preparation of a starch-promoted alkyl ketene dimer (AKD) sizing emulsion is provided. The inventive method comprises adding a sizing promoter comprising high-charge cationic starch and polyaluminum chloride (PAC) to a stabilized AKD emulsion and further wherein addition of said sizing promoter comprising high-charge cationic starch and PAC is effected at ambient temperature, after emulsification, stabilization, and homogenization of said stabilized AKD emulsion; and prior to addition of the starch-promoted AKD sizing emulsion to papermaking furnish, pulp, or fiber stock.

A system and method of forming a molded pulp product that involves separately collecting, from a paper-making process, waste water containing short fibers at a first fiber consistency, waste water as dilution water containing fibers at a second fiber consistency that is lower than the first fiber consistency, and water containing long fibers, the long fibers having a length that is greater than a length of the short fibers, blending the waste water containing short fibers and the water containing long fibers to obtain a pulp slurry, and molding the pulp slurry into a molded pulp product at a pulp molding machine. In an embodiment, filtrate removed during the molding of the molded pulp product has a BOD measurement that is 95% less than a BOD measurement of the pulp slurry, where the BOD measurements are obtained using the EPA 405.1, SM5210B Test Method.

A binder includes an inorganic particle and a binding material particle containing a binding material to mutually bind fiber by being provided with water, wherein the binder includes a composite particle in which the binding material particle and the inorganic particle are integrated, and a specific surface area of the inorganic particle is 150 m.sup.2/g or more and 280 m.sup.2/g or less.

The present invention provides a composition and process for preparing a depolymered paper product from polymer-coated paper waste, comprising the steps of treating shredded polymer-coated paper waste with a polymer removing composition comprising a mixture of a solvent component, a surfactant component, and an acidic component.