A method for treating a pulp web in a paper or tissue machine with an extended-nip press unit. This extended-nip press unit includes a shoe press roll with a revolving press belt and a backing roll, where the pulp web is dewatered in the extended press nip between the backing roll and the press belt and where the pulp web is carried on the revolving press belt of the press roll after the extended press nip to a transfer fabric that receives the pulp web. The transfer fabric is guided over a stationary transfer device in the transfer area. A corresponding device for treating the pulp web.

Paper making machine comprising a forming zone in which a layer of fibrous material is formed, a zone for forced removal of water from the fibrous material layer downstream of the forming zone, a drying zone downstream of the forced removal of the water, and a paper collection zone downstream of the drying zone, and means for transporting the layer of fibrous material through said zones of the machine along a path that follows a predetermined transport direction (MD). The forced water removal zone comprises, in turn, two consecutive zones (Z1, Z2) along said transport direction (MD), in which a capillary roller (44) and a pressure element (4S) with a respective counter-roller (4C) are respectively arranged, acting consecutively on the layer of fibrous material upstream of the drying zone.

A method of making tissue paper is provided, in which a fibrous web is formed in a forming section and transferred to a Yankee drying cylinder in a non-dewatering transfer nip formed between the Yankee drying cylinder and a shoe roll. The shoe roll has a shoe that is deformable such that it can adapt to a cylindrical outer surface of the Yankee drying cylinder, and a rotatable flexible jacket arranged to run in a loop around the shoe. A structured carrier fabric runs around the shoe roll and has land areas and void areas facing the fibrous web. The length of the transfer nip is in the range of 30 mm -100 mm and the linear load in the transfer nip is in the range of 35 kN/m-120 kN/m. The peak pressure in the transfer nip lies in the range 2 MPa-8 MPa.

A method for producing cellulose-fibre-based drinking straws and a drinking straw. The method comprises: providing a cellulose material, producing at least one aqueous suspension comprising the cellulose material and adding additives to the suspension, homogenizing the aqueous suspension and pre-drying to obtain at least one water-containing non-woven web having a first side and a second side, drying the water-containing non-woven web in a plurality of drying steps to form at least one paper web having a first side and a second side, further processing the paper web or a plurality of paper webs to form a cellulose-fibre-based drinking straw.

At least the first side of the non-woven web is compressed with a line load of 80 kN/m to 500 kN/m before, during or after one of the drying steps and before the further processing to form a cellulose-fibre-based drinking straw.

The present invention relates to a method for manufacturing a support body arrangement for an apparatus having an extended nip formed between the support body and a counter-pressure member, wherein the method comprises: providing a base body (51) comprising at least one pressure chamber configured to be pressurized for controlled expanding of the base body in a first direction; providing a support body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member; providing a mounting structure (53); mounting the support body (52) on the base body (51) by applying the mounting structure (53) so that movement of the support body (52) in relation to the base body (51) is prevented, wherein the support body (52) is placed on the base body (51) so that the working surface (15) faces away from the base body (51). The invention also relates to a support body arrangement.

The present invention relates to a support body (50) for a paper machine having an extended nip formed between the support body and a counter-pressure member, wherein the support body comprisesa base body (51) comprising an upper surface facing in the first direction, a cover body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member, wherein the cover body (52) is mounted on the upper surface of the base body (51) such that the working surface faces in the first direction, and wherein the cover body (52) comprises a first material, said first material being a polymer. The invention also relates to a paper machine comprising a support body (50).

The present invention relates to a method of making tissue paper in which a fibrous web (W) is formed in a forming section (2) and transferred to a Yankee drying cylinder (12) in a non-dewatering transfer nip (TN) formed between the Yankee drying cylinder (12) and a shoe roll (14). The Yankee drying cylinder (12) has a cylindrical outer surface (13) and it is arranged to be rotatable about an axis of rotation (A). The shoe roll (14) has a shoe (15) that is deformable such that it can adapt to the cylindrical outer surface (13) of the Yankee drying cylinder (12) and the shoe roll (14) also comprises a rotatable flexible jacket (16) that is arranged to run in a loop around the shoe (15). A structured carrier fabric (10) runs in a loop around the shoe roll and has land areas and void areas facing the fibrous web. The method comprises forming the transfer nip (TN) between the shoe (15) and the cylindrical outer surface (13) of the Yankee drying cylinder (12) and the length (L) of the transfer nip (TN) in the circumferential direction of the Yankee drying cylinder (12) is in the range of 30 mm -100 mm and the linear load in the transfer nip (TN) is in the range of 35 kN/m-120 kN/m. According to the invention the peak pressure in the transfer nip (TN) as defined by the linear load divided by the land area of the carrier fabric (10) lies in the range 2 MPa-8 MPa.

A press cover is provided for a press roll, in particular for a press roll of a shoe press for dewatering a web of fibrous material, in particular a paper, cardboard, tissue or pulp web, or for a conveyor belt, in particular for a machine for producing or treating a web of fibrous material, in particular a paper, cardboard or tissue producing machine. The press cover or conveyor belt includes at least one polyurethane-containing layer. The polyurethane is formed by reacting a prepolymer and a crosslinker component. The prepolymer is a reaction product of phenylene 1,4-diisocyanate (PPDI) and of a polyol component containing at least one polyether polyol and/or at least one polycarbonate polyol. The crosslinker component contains a C.sub.6-14 diol. A shoe press for dewatering of a fibrous material web and a machine for production or treatment of a fibrous material web, are also provided.

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

Shoe press comprising a fixed support structure (2, 10), a flexible belt (1) rotating about said fixed support structure (2, 10) which flexible belt (1) can be pushed against a bearing element (4) to define a pressure nip (N), a shoe (3) connected with the fixed support structure (2, 10) and arranged with respect to the belt (1) so as to push the latter towards the bearing element (4) in correspondence of the nip (N) by effect of a pressure exerted on the same shoe (3) by corresponding loading means. The loading means are constituted by hydraulic cylinders each of which has a chamber (90) formed by a corresponding passing hole formed in the fixed support structure (2, 10) and a rod (91) which on one side is free to slide inlaid hole and on the other side transmits pressure to the shoe (3).