Modified polyurethane belt for a paper, board, pulp or tissue machine and process of producing thereof
AssigneeValmet Technologies Oy
InventorVesa-Matti Riihioja
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Abstract
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.
Claims13
A belt for a paper, board, pulp, or tissue machine, wherein the belt comprises:
- a body comprising an inner surface and an outer surface;
- wherein the body comprises an outer layer forming the outer surface of the body, the outer layer having a thickness of at least 0.5 mm;
- and
- wherein the outer layer forming the outer surface of the body comprises a modified polyurethane, the modified polyurethane comprising a polyurethane matrix having a covalent bond with a polydialkylsiloxane.
A belt for a sleeve roll or shoe press wherein the belt comprises:
- a body comprising an inner surface and an outer surface;
- wherein the body comprises an outer layer forming the outer surface of the body, the outer layer having a thickness of at least 0.5 mm, and
- wherein the outer layer forming the outer surface of the body comprises a modified polyurethane, the modified polyurethane comprising a polyurethane matrix having a covalent bond with a polydialkylsiloxane wherein the polydialkylsiloxane is between 1.0 wt.-% and 2.5 wt. %.
Dependencies are inferred from the claim text.