Provided is a papermaking belt that is used in a papermaking machine and that comprises a first plane on which a wet paper web is placed and a second plane on the opposite side to the first plane, wherein the papermaking belt comprises a reinforcing fibrous substrate layer comprising at least one layer of a woven fabric, at least one layer of said woven fabric comprises a double or more combination weave pattern, said combination weave pattern comprises first yarns and second yarns that are placed in parallel; said first yarns are placed closer to the first plane-side than said second yarns, and said second yarns are placed closer to the second plane-side than said first yarns, and the fineness of said first yarns are greater than the fineness of said second yarns.

A process produces a body of a belt (10) for a paper, board, pulp or tissue machine, the body having an inner surface and an outer surface. The process includes producing a modified polyurethane by adding a polydialkylsiloxane having at least one functional group to a manufacturing process of a polyurethane in order to obtain the modified polyurethane, which modified polyurethane is a polyurethane matrix having a covalent bond with the polydialkylsiloxane, and forming the body of the belt, wherein the body is the modified polyurethane. The belt (10) is for a paper, board, pulp, or tissue machine, or for a shoe press and a sleeve roll.

A papermaking device may have excellent strength and suppressed unevenness in strength between its parts. Such a papermaking device may be used in papermaking machine and may include at least one resin layer comprising polyurethane resin. The polyurethane resin may be obtained by reacting a urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group. The urethane prepolymer may be obtained by reacting a polyisocyanate compound including 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound including one or more polyether polycarbonate diol(s).

A belt (10) for a fiber web machine has an inner surface (11) and an outer surface (12). A plurality of parallel dewatering grooves are arranged in a first direction (D1) on the outer surface (12) of the belt (10), each dewatering groove having a width. A first dewatering groove (21) has shallow portions (30) having a first depth (32), and deep portions (40) having a second depth (42), which first and second depths (32, 42) are determined from the outer surface (12) of the belt (10) in a depth direction, wherein the first depth (32) is smaller than the second depth (42).

Provided are a papermaking device having an excellent strength in which the unevenness in strength between its parts is suppressed, and a method for producing the papermaking device. Also provided is a papermaking device for use in papermaking machine, the papermaking device comprising at least one resin layer comprising a polyurethane resin, wherein the polyurethane resin comprises as a component a polyether polycarbonate diol comprising one or more unit(s) A expressed by the following formula (1). ##STR00001##

A shoe press roll cover for a machine for producing and/or finishing a fibrous web, such as a paper, card or tissue web, is formed of a matrix material composed of polyurethane, formed essentially from 4,4-MDI as isocyanate, at least one polyol and at least one crosslinker. The polyurethane matrix material is biobased to an extent of at least 20% by weight. The polyol and the crosslinker are selected from one of several combinations: a) biobased PTMEG as polyol and a mixture of MCDEA and PTMEG as crosslinker; b) polycarbonate as polyol and a mixture of MCDEA and biobased polycarbonate polyol as crosslinker; c) a mixture of biobased polycarbonate polyol and PTMEG as polyol and 1,4-BDO as crosslinker; d) PTMEG as polyol and a mixture of PTMEG and MCDEA as crosslinker, with the 4,4-MDI in the isocyanate and the PTMEG in the polyol being biobased.

The invention relates to a press belt for a shoe press. A press belt (5) is an endless loop made of elastomeric material and its outer surface (11) is provided with several grooves (13) to remove water. On the outer surface (11) of the press belt, there is at least one section where the depths (GD) of adjacent drain grooves, from the outer surface, change constantly. The invention also relates to an arrangement in a long nip and to a method of manufacturing a press belt.

A shoe press belt with excellent mechanical properties, in particular excellent wear resistance is provided, and a method of manufacturing the shoe press belt for use in a papermaking machine is also provided. The belt is constituted by a resin layer and includes an outer circumferential layer surface contacting a felt. The outer circumferential layer surface is formed with a surface-treated layer, in which part of the resin layer is modified by coating a composition including an isocyanate compound onto a semi-finished outer circumferential layer and by performing a curing treatment.

A structure for use in industrial fabrics such as paper machine clothing and engineered fabrics. The structure is a bicomponent extruded elastomeric netting or mesh having a high degree of both compressibility under an applied normal load and excellent recovery (resiliency or spring back) upon removal of that load.

A press jacket includes at least one polymer layer. The polymer layer includes, or has been produced from, a polyurethane. The polyurethane has been formed from a prepolymer and a cross linking agent. The prepolymer is a reaction product of phenylene 1,4-diisocyanate and a polyol. The cross linking agent includes the following components: a first component including 1,4-butanediol or 1,4-hydroquinone bis(2-hydroxyethyl) ether (HQEE), a second component including at least one aliphatic diamine, and a third component including at least one alkanolamine. A press roll, a shoe press and a process for the production of a press jacket are also provided.