| 摘要 |
The present invention refers to a doctor blade (1) comprising a metal support (3) completely coated with a polymeric material. The doctor blade (1) works in combination with a cylinder (2) and consists of a steel support (3) with a polished surface coated with a layer of variable thickness of polymeric material, comprising: an ultrathin layer (0) which coats the whole surface of the doctor blade (1); a thicker layer (6) which coats one side of one edge (4, 5) of the doctor blade (1) or both sides of one edge (4, 5) of the doctor blade (1) or the same side of both edges (4, 5) of the doctor blade (1) or both sides of both edges (4, 5) or one side of the doctor blade (1) or both sides of the doctor blade (1). In any case, the thicker layer (6) coats at least the side of the edge (4 or 5) of the doctor blade (1) that works in contact with the surface of the cylinder (2) and the front head part of said side. The polymeric material that constitutes the coating layer is preferably Teflon s(R), possibly with solid material added and advantageously with a dry lubricating material (Teflon(R), molybdenum sulphide, graphite, etc.) added. The present invention also refers to a method of coating the metal support (3) of the doctor blade (1) with a layer of variable thickness of polymeric material, in particular of Teflon s(R).
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