Abstract: The object of the present invention is to reduce the wear of the doctor blade applied to the wet paper web transfer belt and the wear of the guide rolls supporting the wet paper web transfer belt while maintaining the wear resistance of the wet paper web contacting surface and the machine contacting surface of the wet paper web transfer belt together with the adhesive and releasing properties of the wet paper web on the wet paper web contacting surface of conventional wet paper web transfer belts. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises a spherical filler.

Abstract: The object of the present invention is to provide a wet paper web transfer belt wherein the adhesive properties and releasing properties of the wet paper web with the wet paper web contacting surface of conventional wet paper web transfer belts have been further improved and paper robbing and floating edges do not occur. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises two different types of fillers including a high-roundness filler with a relatively high roundness and a low-roundness filler with a relatively low roundness.

Abstract: There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.

Abstract: There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.

Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer. The wet paper web contacting surface includes, in the width direction, sheet edge regions for carrying the edge parts of the wet paper web and a center region for carrying the center vicinity of the wet paper web. The arithmetic average roughness Ra1 (?m) of the wet paper web contacting surface in the sheet edge regions is smaller than the arithmetic average roughness Ra2 (?m) of the wet paper web contacting surface in the center region, and prescribed roughness related equations are fulfilled.

Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer, and the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web. A prescribed relation of the swelling rate in water of the resin layer and the surface roughness of the wet paper web contacting surface is fulfilled in accordance with the basis weight of the base paper of the wet paper web.

Abstract: The object of the present invention is to reduce the wear of the doctor blade applied to the wet paper web transfer belt and the wear of the guide rolls supporting the wet paper web transfer belt while maintaining the wear resistance of the wet paper web contacting surface and the machine contacting surface of the wet paper web transfer belt together with the adhesive and releasing properties of the wet paper web on the wet paper web contacting surface of conventional wet paper web transfer belts. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises a spherical filler.

Abstract: The object of the present invention is to provide a wet paper web transfer belt wherein the adhesive properties and releasing properties of the wet paper web with the wet paper web contacting surface of conventional wet paper web transfer belts have been further improved and paper robbing and floating edges do not occur. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises two different types of fillers including a high-roundness filler with a relatively high roundness and a low-roundness filler with a relatively low roundness.

Abstract: Provided is a belt for transferring a wet web, wherein any water mark does not appear on made paper even when a rate of feeding the belt for transferring a wet web by a roll is high. The roll side layer surface of the belt for transferring a wet web has the surface structure in which the percentage of a contact area with the roll per unit area is 10% to 75% and a surface roughness Ra is 50-150 ?m.

Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer. The wet paper web contacting surface includes, in the width direction, sheet edge regions for carrying the edge parts of the wet paper web and a center region for carrying the center vicinity of the wet paper web. The arithmetic average roughness Ra1 (?m) of the wet paper web contacting surface in the sheet edge regions is smaller than the arithmetic average roughness Ra2 (?m) of the wet paper web contacting surface in the center region, and prescribed roughness related equations are fulfilled.

Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer, and the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web. A prescribed relation of the swelling rate in water of the resin layer and the surface roughness of the wet paper web contacting surface is fulfilled in accordance with the basis weight of the base paper of the wet paper web.

Abstract: A belt for papermaking shoe press is provided which comprises a reinforcing fibrous base (6) and a polyurethane layer (2) united therewith, the reinforcing fibrous base (6) having been embedded in the polyurethane layer (2). The belt includes a polyurethane layer obtained by curing a mixture comprising: a urethane prepolymer obtained by reacting a polyisocyanate compound selected among p-phenylene-diisocyanate, 4,4?-methylene-bis(phenyl isocyanate), and tolylene-diisocyanate with a polyol compound selected among polypropylene glycol, polytetramethylene glycol, and a polycarbonate diol; a hardener selected among an aliphatic diol compound, hydroquinone-bis-?-hydroxyethyl ether, and organic polyamine compound; and an aliphatic triol compound. Due to this layer, the shoe press belt for papermaking is excellent in wearing resistance and flexing fatigue resistance.

Abstract: A belt for papermaking shoe press is provided which comprises a reinforcing fibrous base (6) and a polyurethane layer (2) united therewith, the reinforcing fibrous base (6) having been embedded in the polyurethane layer (2). The belt includes a polyurethane layer obtained by curing a mixture comprising: a urethane prepolymer obtained by reacting a polyisocyanate compound selected among p-phenylene-diisocyanate, 4,4?-methylene-bis(phenyl isocyanate), and tolylene-diisocyanate with a polyol compound selected among polypropylene glycol, polytetramethylene glycol, and a polycarbonate diol; a hardener selected among an aliphatic diol compound, hydroquinone-bis-?-hydroxyethyl ether, and organic polyamine compound; and an aliphatic triol compound. Due to this layer, the shoe press belt for papermaking is excellent in wearing resistance and flexing fatigue resistance.

Abstract: The present invention provides an animal fibers having improved shrink proofing and pilling resistance properties and method for preparation thereof. An animal fiber having excellent shrink proofing and pilling resistance and retaining its original water repellency is also provided. A method of treating animal fiber in which a surface layer part of animal fiber is primary-oxidized in advance with an oxidizer, and aqueous treatment liquid containing ozone in the form of ultrafine bubbles of 5? or less is allowed to collide against the fiber by blowing the liquid on the fiber in the aqueous treatment solution, and then, the fiber is treated with a reducing agent. Particularly, the above-mentioned method for treating animal fiber in which ultrafine bubbles of ozone are formed by using a line mixer. The method in which an apparatus which collects the ultrafine ozone bubbles in aqueous treatment liquid on the fiber is used so that the bubbles are not scattered out of a treatment reaction bowl.

Abstract: A mechanism, giving less environmental load, for treating animal fibers of a continuous web form so as not to spoil inherent properties of the animal fibers such as hand-feeling and water repellency, so as to improve resistance to felting (shrinkage) and pilling. The mechanism includes: a tank filled with a treatment liquid; a net-conveyor having upper and lower mesh belts put one upon the other to sandwich the continuous web form therebetween for conveying the web form through the liquid of the tank; a treating-liquid circulation system including a gas-liquid mixing pump connected to a suction-port in the tank and pumping out the liquid, a static mixer connected downstream of the pump, and a discharge nozzle placed at a position in the tank facing the suction-port with the mesh belts therebetween, the discharge nozzle being connected downstream of the mixer; and an ozonizer for supplying ozone gas into the system.

Abstract: A slenderized crimped animal fiber with a fixed slenderized form having a lowering rate of tensile strength for undyed spun yarn of no less than 10%, fiber contraction in boiling water of no more than 1%, an alkali solubility of no more than 22% by weight and a UB solubility of no more than 35% by weight, wherein the slenderized crimped animal fiber is prepared by being drawn by practically 1.20 to 1.60 times after an anisotropic swelling is given to the animal fiber consisting of bilateral structure using swelling plasticization with base.

Abstract: A mechanism, giving less environmental load, for treating animal fibers of a continuous web form so as not to spoil inherent properties of the animal fibers such as hand-feeling and water repellency, so as to improve resistance to felting (shrinkage) and pilling. The mechanism includes: a tank filled with a treatment liquid; a net-conveyor having upper and lower mesh belts put one upon the other to sandwich the continuous web form therebetween for conveying the web form through the liquid of the tank; a treating-liquid circulation system including a gas-liquid mixing pump connected to a suction-port in the tank and pumping out the liquid, a static mixer connected downstream of the pump, and a discharge nozzle placed at a position in the tank facing the suction-port with the mesh belts therebetween, the discharge nozzle being connected downstream of the mixer; and an ozonizer for supplying ozone gas into the system.

Abstract: A slenderized crimped animal fiber with a fixed slenderized form having a lowering rate of tensile strength for undyed spun yarn of no less than 10%, fiber contraction in boiling water of no more than 1%, an alkali solubility of no more than 22% by weight and a UB solubility of no more than 35% by weight, wherein the slenderized crimped animal fiber is prepared by being drawn by practically 1.20 to 1.60 times after an anisotropic swelling is given to the animal fiber consisting of bilateral structure using swelling plasticization with base.

Abstract: The present invention provides an animal fibers having improved shrink proofing and pilling resistance properties and method for preparation thereof.