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US 10,563,354 B2Granted
Hydrophobic and/or amphiphobic roll cover
AssigneeStowe Woodward Licensco, LLC
InventorsChris Tyson, Charles Hunter, Jun Xu
Life of this patent
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Abstract
The present invention relates generally to an industrial roll, comprising: a substantially cylindrical metallic core; a base layer that is adhered to and circumferentially overlies the core; a polymeric topstock layer that circumferentially overlies the base layer; and a hydrophobic and/or amphiphobic coating that circumferentially overlies the topstock layer.
Claims13
An industrial roll, comprising:
- a substantially cylindrical metallic core;
- a base layer that is adhered to and circumferentially overlies the core;
- a polymeric topstock layer that circumferentially overlies the base layer;
- a hydrophobic or amphiphobic coating that circumferentially overlies the topstock layer;
- and
- a transition layer between the topstock layer and the hydrophobic or amphiphobic coating, wherein the transition layer comprises an interphase mixing of the topstock layer and the hydrophobic or amphiphobic coating,
- wherein the polymeric topstock layer comprises polyurethane and the hydrophobic or amphiphobic coating comprises at least two hydrophobic and/or amphiphobic compounds and a matrix material comprising polyurethane,
- wherein the hydrophobic or amphiphobic coating comprises the at least two hydrophobic and/or amphiphobic compounds each in a ratio of about 5 parts to about 30 parts against 100 parts by weight of the polyurethane,
- wherein the at least two hydrophobic and/or amphiphobic compounds are polytetrafluoroethylene (PTFE) and hydrophobic diatomaceous earth, each compound having a size in a range of about 10 nm to about 500 μm,
- wherein the hydrophobic or amphiphobic coating has a contact angle greater than 120° for water.
7 more elements
A method of constructing an industrial roll having a hydrophobic or amphiphobic coating, the method comprising the steps of:
- providing a substantially cylindrical metallic core;
- applying a base layer that circumferentially overlies the core;
- and
- applying a bi-layer over the base layer, the bi-layer comprising a topstock layer that circumferentially overlies the base layer and a hydrophobic or amphiphobic coating that circumferentially overlies the topstock layer, the topstock layer and the hydrophobic or amphiphobic coating being applied simultaneously such that an interphase mixing occurs between the topstock layer and the hydrophobic or amphiphobic coating to form a transition layer between the topstock layer and the hydrophobic or amphiphobic coating;
- wherein the topstock layer comprises polyurethane,
- wherein the hydrophobic or amphiphobic coating comprises polytetrafluoroethylene (PTFE), a hydrophobic diatomaceous earth, and a matrix material comprising polyurethane in a ratio of about 1 part to about 50 parts by weight of PTFE against 100 parts by weight of the polyurethane, and about 1 part to about 50 parts by weight of hydrophobic diatomaceous earth against 100 parts by weight of the polyurethane, and wherein PTFE and hydrophobic diatomaceous earth each have a size in a range of about 10 nm to about 500 μm.
3 more elements
Dependencies are inferred from the claim text.