Abstract: A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt includes, as an urethane prepolymer component, an aliphatic polycarbonatediol component and an aromatic diisocyanate component, and includes, as a curing agent component, an aliphatic diol component having a carbon number of less than or equal to 6 and an aromatic diol component having two hydroxyethoxy groups. A content of the aromatic diol component with respect to the aliphatic diol component and the aromatic diol component is more than or equal to 10 mass % and less than or equal to 50 mass %. Accordingly, there is provided a shoe press belt suppressed in generation and development of a crack.

Abstract: A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt includes, as an urethane prepolymer component, an aliphatic polycarbonatediol component and an aromatic diisocyanate component, and includes, as a curing agent component, an aliphatic diol component having a carbon number of less than or equal to 6 and an aromatic diol component having two hydroxyethoxy groups. A content of the aromatic diol component with respect to the aliphatic diol component and the aromatic diol component is more than or equal to 10 mass % and less than or equal to 50 mass %. Accordingly, there is provided a shoe press belt suppressed in generation and development of a crack.

Abstract: A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt is a thermosetting polyurethane obtained by curing an urethane prepolymer using a curing agent. The urethane prepolymer includes a first urethane prepolymer (A) obtained by a reaction between an aromatic diisocyanate and a polyol component containing an aliphatic polycarbonatediol represented by a chemical formula (1). In the chemical formula (1), m is a combination of two or more of integers of not less than 2 and not more than 12, and n is not less than 3 and not more than 33.

Abstract: A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt is a thermosetting polyurethane obtained by curing an urethane prepolymer using a curing agent. The urethane prepolymer includes a first urethane prepolymer (A) obtained by a reaction between an aromatic diisocyanate and a polyol component containing an aliphatic polycarbonatediol represented by a chemical formula (1). In the chemical formula (1), m is a combination of two or more of integers of not less than 2 and not more than 12, and n is not less than 3 and not more than 33.

Abstract: In a press belt (2), stepped portions are formed between an outer peripheral surface of a central region (A) and outer peripheral surfaces of end-corresponding regions (B) located so as to corresponding to both ends in a lateral direction of a press roll (1) or a pressure shoe (3), so that the end-corresponding regions have a smaller thickness than the central region. The outer peripheral surfaces of the end-corresponding regions are finished so that a processing flaw depth becomes 10 ?m or less.

Abstract: In a press belt (2), stepped portions are formed between an outer peripheral surface of a central region (A) and outer peripheral surfaces of end-corresponding regions (B) located so as to corresponding to both ends in a lateral direction of a press roll (1) or a pressure shoe (3), so that the end-corresponding regions have a smaller thickness than the central region. The outer peripheral surfaces of the end-corresponding regions are finished so that a processing flaw depth becomes 10 ?m or less.

Abstract: A press belt having superior cracking resistance, wear resistance and pressure deflection resistance and an excellent traveling property and a method of manufacturing the same as well as a shoe press employing the same are provided. A press belt in a press comprising a rotatively traveling endless press belt and pressing means, including terminal corresponding areas (B, B?) corresponding to both ends of the pressing means in the cross direction and a central area (A) located between the terminal corresponding areas and mainly composed of thermosetting polyurethane obtained from a thermosetting polyurethane material containing a phenylene isocyanate derivative having an isocyanate group (NCO) on an end and a hardener having an active hydrogen group (H) on an end with the equivalent ratio (H/NCO) between the active hydrogen group and the isocyanate group set relatively high on the terminal corresponding areas and relatively low on the central area and a method of manufacturing the same.

Abstract: A paper making elastic belt has a drainage channels in a surface. A surface roughness of a wall of the drainage channel is not more than 2.0 ?m in arithmetic average roughness (Ra).

Abstract: A press belt 2 comprises both end corresponding regions B positioned so as to correspond to both ends of a press roll 1 or a pressing shoe 3 in the width direction and a center region A positioned between the both end corresponding regions B. The center region A has a predetermined thickness and constitutes a pressed part pressed by pressing means. The end corresponding regions B have a thickness smaller than that of the center region A to form recessed parts and constitute pressure escape parts for allowing the pressure from the pressing means to escape.

Abstract: A press belt with occurrence of pinholes remarkably reduced as well as a manufacturing method of the press belt are provided. The press belt includes a reinforcing base material containing multifilaments that are impregnated with a bundling agent and an elastic material in which the reinforcing base material is buried. The manufacturing method is a method of manufacturing the aforementioned press belt. The reinforcing base material is preferably made of a woven fabric and the bundling agent preferably contains as its main component thermosetting resin. As the bundling agent, a bundling agent containing as its main component urethane-based resin is suitably used. For the reinforcing base material, organic fibers are preferably used. The bundling agent is preferably applied in the form of emulsion to the multifilaments or the reinforcing base material.

Abstract: A papermaking belt, used for a shoe pressing belt, a calender belt and a sheet transfer belt, is prevented from cracking and inhibited from growth of a crack, and comprises a reinforcing substrate (6) embedded in a thermosetting polyurethane layer (7) so that the said reinforcing substrate (6) and the said thermosetting polyurethane layer (7) are integrated with each other and the outer peripheral surface and the inner peripheral surface of the belt are formed by polyurethane layers, the polyurethane layer forming the outer peripheral surface is made of a composition containing a urethane prepolymer having isocyanate groups on ends and a hardener containing dimethylthiotoluenediamine.

Abstract: In a shoe press belt (11; 21; 31; 41; 51; 61) endlessly formed by an elastic material, a plurality of drains (15; 25; 35; 45; 55; 65) are formed on the outer peripheral surface of the shoe press belt along the peripheral direction of the shoe press belt, and the depths of these drains are progressively increased from a central pressurizing portion (C1; C2; C3; C4; C5) toward end pressurizing portions (A1, A1?; A2, A2?; A3, A3?; A4, A4?; A5, A5?) of the shoe press belt. A shoe press employing this shoe press belt. Thus, a shoe press belt capable of uniformly dehydrating the overall wet web and a shoe press employing the same can be provided.

Abstract: A papermaking belt, used for a shoe pressing belt, a calender belt and a sheet transfer belt, is prevented from cracking and inhibited from growth of a crack, and comprises a reinforcing substrate (6) embedded in a thermosetting polyurethane layer (7) so that the said reinforcing substrate (6) and the said thermosetting polyurethane layer (7) are integrated with each other and the outer peripheral surface and the inner peripheral surface of the belt are formed by polyurethane layers, the polyurethane layer forming the outer peripheral surface is made of a composition containing a urethane prepolymer having isocyanate groups on ends and a hardener containing dimethylthiotoluenediamine.

Abstract: A shoe press belt capable of preventing the occurrence and growth of cracks therein and is used in a paper-making press apparatus containing a press roll, a belt, and a pressure shoe for pressing a material web, wherein the shoe press belt includes a reinforcing layer, a first elastic material layer, and a second elastic material layer. A plurality of grooves are formed at an exterior peripheral surface region of the first elastic material layer. The bottom of the grooves at an axial end region of the belt corresponding to at least one of an end-proximate region in an axial direction of the pressure shoe and an end-proximate region in an axial direction of the press roll extends toward the reinforcing layer relative to the bottom of the grooves at a region other than the end region.

Abstract: A papermaking belt which prevents cracking and inhibits crack growth which includes a reinforcing substrate embedded in a thermosetting polyurethane layer so that the reinforcing substrate and the thermosetting polyurethane layer are integrated with each other and the outer peripheral surface and the inner peripheral surface of the belt are formed by polyurethane layers, the polyurethane layer forming the outer peripheral surface being made of a composition containing a urethane prepolymer having isocyanate groups on its ends and a hardener containing dimethylthiotoluenediamine.

Abstract: A paper making elastic belt has a drainage channels in a surface. A surface roughness of a wall of the drainage channel is not more than 2.0 ?m in arithmetic average roughness (Ra).

Abstract: A method of manufacturing an elastic sleeve for a shoe press having an inner diameter gradually reduced from both ends toward a center in an axial direction, comprising the steps of stretching the sleeve formed of an uncured or imperfectly cured elastic material between two rolls, moving the two rolls in directions apart from each other while deflecting the two rolls in such directions that the center parts thereof are moved close to each other by utilizing the tension of the sleeve, and perfectly curing, in this state, the elastic material while rotating the sleeve to gradually reduce the inner diameter of the elastic sleeve from both ends toward the center in the axial direction.

Abstract: An elastic belt formed of an elastic material endlessly in a cylinder has an inner surface and/or an outer surface thermally pressed and thus smoothed to provide an industrial elastic belt. Furthermore a method of producing an industrial elastic belt, including the step of thermally pressing an inner surface and/or an outer surface of an elastic belt formed of an elastic material endlessly in a cylinder. An industrial elastic belt having a surface enhanced in smoothness and a method of producing an industrial elastic belt that can help the belt to have a surface enhanced in smoothness, can thus be provided.

Abstract: A papermaking belt of improved durability capable of preventing a crack from progressing into the which includes a reinforcing substrate embedded in an elastic material, and the elastic material containing a surface layer, a back layer and an intermediate layer located between the surface layer and the back layer and having a thick part containing a thickness in the belt thickness direction along the belt traveling direction in the said intermediate layer. The thick part can also be exposed on the belt surface through the surface layer, the thick part is preferably made of a low-hardness elastic material and the surface layer is preferably made of a high-hardness elastic material.

Abstract: A press belt employed for pressurizing a zonal material, endlessly formed by an elastic material with the thickness progressively reduced from a central pressurizing portion toward end pressurizing portions. A shoe press comprising at least the aforementioned press belt, a pressure shoe applying pressure to the aforementioned press belt and pressure regulation means regulating the pressure of the pressure shoe. Thus, the pressure can be uniformly applied to a zonal material to be pressurized.