A system and method is provided for proactive process intervention in manufacturing creped products via a chemical feed stage and a Yankee dryer stage. The method includes generating signals from a plurality of online sensors, corresponding to directly measured variables for respective process components such as, e.g., pH, conductivity, and Yankee blade vibration. Models are developed including retrievable information relating combinations of certain directly measured variables to respective quality characteristics of the creped product. The method further includes indirectly determining quality characteristics (e.g., softness, bulk) for the creped product, substantially in real time, based on, e.g., signals corresponding to directly measured variables, and optionally a predicted natural coating potential. An output feedback signal is automatically generated corresponding to a detected intervention event based on the indirectly determined one or more quality characteristics and respective predetermined targets. The feedback signal may automatically regulate chemistry feed characteristics, substantially in real time.

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).

The invention relates to a tissue paper making machine designed for possible rebuild from one concept to another. The machine comprises a forming section (2) and a Yankee drying cylinder (3) mounted to be rotatable about a first axis of rotation (A1). The forming section has a forming roll mounted for rotation about a second axis of rotation (A2) which is parallel to the first axis of rotation (A1). The forming section (2) has a head box (5) and a first and a second forming fabric (6,7). The head box (5) is arranged to inject stock into a gap (8) between the first forming fabric (6) and the second forming fabric (7). The first forming fabric (6) is a felt that forms a loop and is arranged to carry a newly formed fibrous web (W) from the forming section (2) to the Yankee drying cylinder (3). The tissue paper making machine (1) comprises a press roll (9) arranged inside the loop of the first forming fabric (6) and forming a nip (N) against the Yankee drying cylinder (3). The distance (X) in the horizontal direction between the first axis of rotation (A1) and the second axis of rotation (A2) is in the range of 18 m-40 m.

Herein described is a plant for the production of a web-like paper material which comprises a system for generating steam at three or more pressure levels using the discharge coming from a Yankee hood. This system allows an energy recovery, given that the steam produced is generated through two heat exchangers, supplied by the Yankee hood discharge which would otherwise be disposed into the atmosphere. The first heat exchanger conveys the exit of the mixed phase in a first pressurised tank, where the steam is separated from water. From here the steam is introduced into the line for use in the paper drying process, while the water at balance temperature with the steam is transferred in a second pressurised tank, with lower pressure with respect to that of the first tank. Lastly, the residual water is introduced into a third pressurised tank, with lower pressure with respect to that of is the second tank, which collects the condensate from the Yankee cylinder together with the blow-through steam, so that this blow-through steam is recompressed to the operating pressure of the plant and it is re-introduced in the plant.

A deflection member that includes a reinforcing member and a plurality of tiles fastened to the reinforcing member.

A method of applying a long lasting wear-resistant coating on a Yankee drying cylinder (1), the method comprises: the step of providing a Yankee drying cylinder (1) having a cylindrical shell (2) with a circular cross-section and an outer surface (3); the step of performing a thermal spray operation to form a wear-resistant coating layer (4) on the outer surface of the Yankee drying cylinder (1) during which thermal spray operation coating feedstock (6) is fed to at least one spray device (5), heated to become plastic and/or semi-molten and/or molten and sprayed onto the outer surface (3) of the Yankee drying cylinder (1) to form the wear-resistant coating layer (4), the coating feedstock (6) for the thermal spray operation consisting of: 1.5 to 2.5 weight percent Al 0.0 to 0.2 weight percent Ti, 9.5 to 10.5 weight percent Si, 0.0 to 0.2 weight percent B, 12.5 to 14.2 weight percent Mo, 0.0 to 0.2 weight percent V, 0.0 to 0.2 weight percent C, 0.000 to 0.020 weight percent Cr, 4.5 to 6.0 weight percent Mn, 0.0 to 0.2 weight percent Mg, 0.0 to 0.2 weight percent Ni, 0.0 to 0.2 weight percent Nb, the remainder being iron and impurities.

Coatings and Yankee cylinders with such coatings are also disclosed.

The invention relates to a method and system for improving the application of a coating on a Yankee cylinder (CR) in tissue paper machines. The invention implements a moisture-controlled environment (12) in an area of the exposed Yankee cylinder between the take-off position (TO) and ahead of the transfer position (TP) of the web, i.e. before and/or after the application of a coating with Performance Enhancing Material (PEM), wherein the cooling effect on the Yankee surface is increased by increased evaporation rate of water in the coating or water additionally applied onto the coating.

A multi-ply through air dried structured tissue having a bulk softness of less than 10 TS7 and a lint value of 5.0 or less. Each ply of the tissue has a first exterior layer that includes a wet end temporary wet strength additive in an amount of approximately 0.25 kg/ton and a wet end dry strength additive in an amount of approximately 0.25 kg/ton, an interior layer that includes a first wet end additive comprising an ionic surfactant, and a second wet end additive comprising a non-ionic surfactant, and a second exterior layer.

A multi-ply through air dried structured tissue having a bulk softness of less than 10 TS7 and a lint value of 5.0 or less. Each ply of the tissue has a first exterior layer that includes a wet end temporary wet strength additive in an amount of approximately 0.25 kg/ton and a wet end dry strength additive in an amount of approximately 0.25 kg/ton, an interior layer that includes a first wet end additive comprising an ionic surfactant, and a second wet end additive comprising a non-ionic surfactant, and a second exterior layer.

Creped fibrous structures having pillows and knuckles, wherein the creped fibrous structures may exhibit improved knuckle properties, such as Knuckle Roughness Ra, Knuckle Roughness Rq, and Knuckle Creping Frequency and methods for making same are provided, and/or may comprise elongate knuckles comprising discrete pillows and/or elongate pillows between first and second elongate knuckles.