Abrasion-resistant rubber roll cover with polyurethane coating
AssigneeStowe Woodward Licensco, LLC
InventorsWilliam S. Butterfield, Dilip De, Balaji Srinivasan, Gary Kilbourne
Life of this patent
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Abstract
An industrial roll includes: a substantially cylindrical metallic core; a rubber base layer that is adhered to and circumferentially overlies the core; a rubber top stock layer that circumferentially overlies the base layer; and a polyurethane coating that circumferentially overlies the top stock layer. In this configuration, the roll can provide improved abrasion-resistance, sheet release properties, and/or toughness compared to a roll with a rubber cover, but may provide these properties in a cover that is softer than a typical polyurethane cover.
Claims19
An industrial roll, comprising:
- a substantially cylindrical metallic core;
- a rubber base layer that is adhered to and circumferentially overlies the core;
- a rubber top stock layer that circumferentially overlies the base layer, wherein the top stock layer has a hardness of between about 30 and 300 P&J;
- and
- a polyurethane coating that circumferentially overlies the top stock layer, wherein the coating has a hardness of between about 3 and 30 P&J;
- and
- wherein the thickness of the coating is between about 0.05 and 0.25 inches.
An industrial roll, comprising:
- a substantially cylindrical metallic core;
- a rubber base layer that is adhered to and circumferentially overlies the core;
- a rubber top stock layer that circumferentially overlies the base layer;
- and
- a polyurethane coating that circumferentially overlies the top stock layer, the coating having a thickness of between about 0.05 and 0.25 inches and a hardness of between about 3 and 70 P&J.
An industrial roll, comprising:
- a substantially cylindrical metallic core;
- a rubber base layer that is adhered to and circumferentially overlies the core;
- a rubber top stock layer that circumferentially overlies the base layer, the top stock layer having a hardness of between about 30 and 300 P&J;
- and
- a polyurethane coating that circumferentially overlies the top stock layer, the coating having a thickness of between about 0.05 and 0.25 inches and a hardness of between about 3 and 70 P&J.
An industrial roll, comprising:
- a substantially cylindrical metallic core;
- a rubber base layer that is adhered to and circumferentially overlies the core;
- a rubber top stock layer that circumferentially overlies the base layer, wherein the top stock layer has a hardness that is lower than a hardness of the base layer;
- and
- a polyurethane coating that circumferentially overlies the top stock layer;
- wherein the coating has a hardness of between about 3 and 70 P&J.
Dependencies are inferred from the claim text.