Adhesion aging protection in corded rubber articles
AssigneeContiTech Transportbandsysteme GmbH
InventorsKatja Henning, David J. Maguire
Life of this patent
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Abstract
A conveyor belt including a carry cover layer, a reinforcement layer which is situated below the carry cover layer, and a pulley cover layer which is situated below the reinforcement layer, where the reinforcement layer is comprised of steel cordage and rubber matrix, and wherein the rubber matrix includes zinc oxide in an amount greater than 5 phr. In some cases the rubber the matrix includes zinc oxide in an amount of 11 phr or greater, or even in an amount of 16 phr or greater. In some aspects, the rubber matrix is devoid of lead oxide. In some aspects, the steel cordage is zinc coated steel cords.
Claims20
A conveyor belt which is comprised of a carry cover layer, a reinforcement layer which is situated below the carry cover layer, and a pulley cover layer which is situated below the reinforcement layer, wherein the reinforcement layer is comprised of steel cordage and rubber matrix, wherein the rubber matrix comprises zinc oxide in an amount of 16 phr or greater, and wherein the steel cordage has a pullout force value of at least 191 N after exposure to a 10% NaCl salt water bath for 14 days.
(canceled)
(canceled)
A conveyor belt which is comprised of a carry cover layer, a reinforcement layer which is situated below the carry cover layer, and a pulley cover layer which is situated below the reinforcement layer, wherein the reinforcement layer is comprised of zinc coated steel cords and rubber matrix, wherein the rubber matrix comprises zinc oxide in an amount of 16 phr or greater, and wherein the steel cordage has a pullout force value of at least 191 N after exposure to a 10% NaCl salt water bath for 14 days.
(canceled)
(canceled)
A rubber article which is comprised of a reinforcement layer, wherein the reinforcement layer is comprised of steel cordage and rubber matrix, and wherein the rubber matrix comprises zinc oxide in an amount greater than 5 phr.
Dependencies are inferred from the claim text.