Method for high scan sputter coating to produce coated, abrasion resistant press plates with reduced built-in thermal stress
AssigneePremark RWP Holdings, Inc.
InventorsMuyuan M. Ma, Jay T. Oliver
Life of this patent
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Abstract
A press plate for producing decorative laminate from resin impregnated paper, with alumina particles on its pressing surface, is coated with diborides selected from the group consisting of hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, or zirconium diboride or mixtures thereof for making the press plate resistant to scratching using a process wherein the press plate and the sputtering head are moved relative to one another to provide a scanning speed sufficient to give a thermal gradient in the press plate of 50° F. or less, to provide reduced built-in stress and more delocalized heat distribution throughout the press plate.
Claims14
A method of making a planar pressing surface for producing decorative laminate from resin impregnated paper, comprising:
- imparting a desired finish on a planar pressing surface;
- removing contaminants from the planar pressing surface;
- and
- coating the planar pressing surface with at least one diboride selected from the group consisting of hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, and zirconium diboride or mixtures thereof in a planar magnetron sputter coating system to a Vickers hardness of at least 2000,
- wherein the coating is performed by causing said planar pressing surface and a sputtering head of the planar magnetron sputter coating system to move relative to one another at a scanning speed to provide a thermal gradient in the planar pressing surface of 50° F. or less.
Dependencies are inferred from the claim text.