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US 9,963,752 B2Granted
Conductive leather materials and methods for making the same
AssigneeFownes Brothers & Co., Inc.
InventorDavid O'Leary
Life of this patent
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Abstract
Conductive leather materials and methods for making the same are provided. The conductive leather materials may have a conductivity suitable to operate touch-sensitive electronic devices without a conductive path to the human body.
Claims17
A method for making conductive leather materials, the method comprising:
- applying a base layer comprising at least one base layer coating, wherein the at least one base layer coating comprises electrically conductive particles, to a drum dyed, processed leather material that has been softened to reduce the surface tension between the leather material and the base layer coating such that the leather material is conditioned to achieve a level of coating penetration of the base layer coating into the leather material such that the leather material is conditioned to achieve 14 to 22 percent moisture and has a wetting time of less than 60 seconds;
- applying a middle layer to the base layer, the middle layer comprising at least one middle layer coating, wherein the at least one middle layer coating comprises aqueous pigment dispersions;
- and
- applying a top layer to the middle layer, the top layer comprising at least one top layer coating, wherein the at least one top layer coating comprises:
- aqueous polyurethane based resins;
- and
- water-dilutable nitrocellulose lacquer emulsions;
- and
- wherein the leather material is thoroughly dried by exposure to heat and moving air after application of each base layer coating, middle layer coating, and top layer coating.
6 more elements
A method for making electrically conductive materials, the method comprising:
- softening a leather material to reduce the surface tension between the leather material and a predetermined base layer coating such that the leather material has a wetting time of less than 60 seconds and is conditioned to achieve 14 percent to 22 percent moisture;
- applying the base layer to the leather material, the base layer comprising the base layer coating, wherein the base layer coating comprises the electrically conductive particles;
- applying a middle layer to the base layer, the middle layer comprising at least one middle layer coating, wherein the at least one middle layer coating comprises aqueous pigment dispersions;
- and
- applying a top layer to the middle layer, the top layer comprising at least one top layer coating, wherein the at least one top layer coating comprises:
- aqueous polyurethane based resins;
- and
- water-dilutable nitrocellulose lacquer emulsions;
- and
- wherein the leather material is thoroughly dried by exposure to heat and moving air after application of each base layer coating, middle layer coating, and top layer coating.
7 more elements
Dependencies are inferred from the claim text.