Abstract: A plate segment includes a substrate having a front side and a back side, wherein the back side is configured to be mounted to a support disc of a disperser; rows of teeth protruding from the front side of the substrate, wherein each of the rows are arranged along an arc extending from one side of the plate segment to an opposite side of the plate segment. In at least one of the rows of teeth, adjacent teeth are joined by a bridge spanning a gap between the adjacent teeth. The bridge is elevated above the front side of the substrate such that the bridge is separated from the front side by an open space in the gap.

Abstract: In a defibrating apparatus, when a region, of a discharge path, including a discharge unit is a downstream discharge path, a region, of the discharge path, other than the downstream discharge path is an upstream discharge path, a region, of a screen, constituting the downstream discharge path is a downstream discharge screen, a region, of the screen, constituting the upstream discharge path is an upstream discharge screen, and a through-hole that causes a defibrating chamber to be in communication with the discharge path is a communication hole, the communication hole is provided on the screen such that the air is less likely to pass through the downstream screen than the upstream screen.

Abstract: The present disclosure relates to a method for preparing an unbleached biomechanical pulp and fully utilizing by-products by treating wheat straws with heat steam in synergy with biological enzymes, which belongs to the technical field of papermaking technology and waste comprehensive utilization. The present disclosure provides a method for preparing an unbleached biomechanical pulp by treating whole wheat straws with heat steam in synergy with biological enzymes, where the prepared high-strength biomechanical pulp can meet the requirements of producing unbleached packaging paper and paper-based materials. At the same time, the by-products are recycled to prepare a biomass compound fertilizer, which turns solid waste into treasure and realizes the high-value full utilization of wheat straw. Therefore, the method in the present disclosure is simple, green, clean and efficient, which has good practical application value and broad application prospects.

Abstract: The present invention relates to a crescent former for producing tissue paper, the former comprising a forming section (A), a press section (B) and a drying section (C), wherein the crescent former further comprises a felt fabric (41) for carrying the stock from the forming nip (15) of the forming section (A) to the press nip (22) of the press section (B), and the felt fabric (41) being configured to carry the stock to the press nip (22) where the stock is transferred to the drying section (C), wherein further the felt fabric (41) is configured to be returned from the press nip (22) to the forming nip (15) in a return section (D) such that the felt fabric (41) forms an endless loop, wherein the return section (D) comprises a cleaning station (42), of which at least a part is arranged in a negative machine direction (?MD) in relation to a center line (R) of the forming roll (12).

Abstract: A papermaking felt with two or more plain weave base fabrics that can be bonded to each other. The joint portions do not open when a batt fiber layer is attached or when the felt is used. The papermaking felt can be made from an MD yarn material in the felt running direction (MD direction) and a CD yarn material in the felt cross-direction (CD direction), including a combination with two or more base fabrics directly overlapped with each other, which have a joint portion wherein the MD direction end portions are joined which include a first MD direction end portion and a second MD direction end portion wherein, with regard to the base fabrics having all included joint portions. The equations (1) and (2) below are satisfied when the maximum distance in the MD direction between the joint portions of the base fabrics is x (cm) and the minimum distance thereof is y (cm): x?750 (1); and 51?y (2).

Abstract: A system comprising: (a) a steam box; and (b) a monitoring system that monitors cleanliness of the steam box and is configured to connect to a paper machine.

Abstract: A fiber structure manufacturing apparatus includes: a defibration unit that pulverizes and defibrates a fiber raw material that contains fibers; a transportation unit that transports a defibrated material after defibration by the defibration unit; a melting-material mixing unit that mixes a melting material into the defibrated material transported by the transportation unit; a fibrous web forming unit that forms a fibrous web by causing a mixture of the defibrated material and the melting material to accumulate; a sheet supplying unit that supplies a shape retainer sheet to the fibrous web; and a heating-and-pressing mechanism that forms a fiber structure by heating and pressing the fibrous web after the shape retainer sheet is supplied; wherein the sheet supplying unit supplies the shape retainer sheet in such a state that nap is raised on a surface, of the shape retainer sheet, that is to be in contact with the fibrous web.

Abstract: A sheet manufacturing apparatus includes a pressing unit, a separate sheet shaping unit, a transportation unit, and a cutting-off unit. The pressing unit includes a pressing roller that presses a material containing fibers and a binder, which has a function of bonding the fibers together, to form the material into a shape of a continuous sheet. The separate sheet shaping unit cuts the continuous sheet into a shape of a separate sheet. The transportation unit is provided between the pressing roller and the separate sheet shaping unit and transports the continuous sheet formed by the pressing unit to the separate sheet shaping unit. The cutting-off unit is provided between the pressing roller and the transportation unit. When transportation abnormality occurs on the continuous sheet that is being transported, the cutting-off unit cuts off, from the continuous sheet, a part of the continuous sheet where the transportation abnormality occurs.

Abstract: A papermaking machine air foil including a housing having a top surface, a bottom surface, side surfaces, a leading edge and a trailing edge, at least one air inlet on the top surface that directs injected air into the housing, and an air slot formed in the bottom surface that directs ejected air from the housing towards a trailing edge of the air foil, the air slot having a V-shape. The papermaking machine air foil is configured to be disposed on top of a paper web at a position adjacent to a Yankee dryer so that the ejected air directed by the air slot of the air foil stabilizes the paper web as the paper web is removed from the Yankee dryer.

Abstract: An elongated planar or profiled component for a manufacturing machine of a fibrous cellulosic web, such as paper, board or tissue web, is at least partially formed from a composite material having a continuous polymer matrix, and reinforcing inorganic fibers embedded in the continuous polymer matrix. The continuous polymer matrix is biodegradable and the reinforcing inorganic fibers are biodegradable glass fibers. A method is disclosed for recycling elongated planar and/or profiled components used for manufacture of a fibrous web.

Abstract: A method for manufacturing a steel Yankee drier including a cylindrical steel mantle with two end heads on each of which a corresponding pin is arranged, the cylindrical mantle having an external surface and an internal surface, and the internal surface of the mantle in cooperation with the end heads delimiting an internal chamber of the Yankee drier in which steam can be introduced. The surface protective coating is at least partially formed on the internal surface of the mantle by introducing a predetermined amount of a nickel bath in a volume delimited in a radial direction by the internal surface of the mantle, followed by a permanence of the bath in said volume for a predetermined time. The surface protective coating protects the internal surface of the mantle from corrosive and/or abrasive agents contained in the steam introduced into said chamber.

Abstract: A sheet manufacturing method includes a web forming step of forming a web by accumulating a defibrated product in a dry manner, a moisture imparting step of imparting the web with moisture, a pressurizing step of pressurizing the web to which the moisture is imparted, and a heating step of heating the web to which the moisture is imparted, in which a water content of the web to which the moisture is imparted in the moisture imparting step is 12% by mass or more, a pressure applied to the web in the pressurizing step is 0.2 MPa or more, and a temperature of the web in the heating step is 100° C. or lower.

Abstract: Belts and fibrous structures of the present disclosure may comprise discrete cells comprising one or more legs and/or one or more concavities in certain patterns or Cell Groups. The Cell Group(s) may comprise pillows having different densities.

Abstract: Products having reducing tissue wrinkling, puckering, and bunching and improved emboss definition, emboss visibility, and perceived softness are described. The methods comprise embossing the tissue sheet with a emboss elements having segments aligned in the machine direction and including an abatement component, such as a tapered width or a multi dual-apex, that can absorb machine direction stretch during the production of the product.

Abstract: A web transportation apparatus includes a mesh belt configured to be rotated to transport a web formed of a dry deposited material containing fibers and a striking member configured to strike a return section of the mesh belt to remove the material attached to the mesh belt. The striking member includes a striking bar and a striking lever. The striking bar is reciprocated to strike the mesh belt.

Abstract: Belts and fibrous structures of the present disclosure may comprise discrete cells comprising one or more legs and/or one or more concavities in certain patterns or Cell Groups. The cells may be discrete knuckles or pillows and the fibrous structures may further comprise an emboss.

Abstract: The objective of the present disclosure is to provide a method for easily evaluating the degree of cleanliness of recycled material derived from used sanitary products. The evaluation method according to the present disclosure has the following configuration. This method for evaluating a degree of cleanliness of recycled material derived from used sanitary products includes: a preparation step of preparing a dispersed aqueous solution in which the recycled material is dispersed in water; a separation step of subjecting the dispersed aqueous solution to centrifugal separation to separate the dispersed aqueous solution into a liquid component and a solid component; and a measuring step of measuring the concentration of protein in the liquid component using a protein measuring means.

Abstract: A method for producing a paper machine clothing includes the following steps: a) providing a film-like substrate having an upper face and a lower face opposite the upper face; b) forming a pattern of holes in the substrate by boring a multiplicity of holes, which connect the upper face to the lower face, into the substrate by way of at least one laser light source. A bore hole strategy is applied which ensures that, in temporal sequence between the forming of a first hole and an immediately adjacent second hole in the pattern of holes, at least one further hole of the pattern of holes is formed in the substrate which is not immediately adjacent either the first hole or the second hole in the pattern of holes.

Abstract: A paper producing apparatus includes: a sieve portion having a plurality of openings; a web forming portion having a deposition surface on which a material passing through the openings and containing fibers is deposited, the web forming portion forming a web on the deposition surface; a sheet forming portion that processes the web into a sheet; and a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion.

Abstract: A dewatering device has a dewatering box and a plurality of dewatering strips. A contour of at least one dewatering strip changes over its length. There is also described a machine for the production of a fibrous web, such as a paper, cardboard or tissue web, with a dewatering device of this kind, and to the use of the latter in a machine of this kind.