Overcoat for a polymer sleeve member for a blanket cylinder and a method for making the overcoat
AssigneeEastman Kodak Company
InventorsBiao Tan, Craig M. Cody, Po-Jen Shih, Joseph A. Pavlisko
Life of this patent
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Abstract
This invention relates to a polymer sleeve including a polymer sidewall and a ceramer outer coating and a method for producing the polymer sleeve for use with a blanket cylinder in an electrophotographic process.
Claims19
A method for producing a polymer sleeve for mounting on a mandrel to form a blanket cylinder for use in an electrophotographic process, the method comprising the steps of:
- a. producing a sleeve having a sidewall of a polymer selected from the group consisting thermoplastic, thermoset and elastomeric polymers, rigid polyurethanes and blends thereof, the sleeve having an inner diameter from about 1 to about 20 percent less than the outer diameter of the mandrel;
- and
- b. coating the sleeve with an outer coating comprising a ceramer containing polyurethane and tetraethoxyorthosilicate, the polyurethane having a molecular weight from about 20,000 to about 80,000 with the polyurethane and the tetraethoxyorthosilicate being present in a weight ratio from about 1.8 to about 2.3.
In a method for producing a sleeve for use on a mandrel to produce a blanket cylinder for use in an electrophotographic process, the sleeve consisting essentially of a sleeve of a polymer selected from the group consisting of thermoplastic, thermoset and elastomeric polymers, rigid polyurethanes and blends thereof and a ceramer coating comprising a polyurethane and tetraethoxyorthosilicate, the sleeve having an inner diameter from about 1 to about 20 percent less than the outer diameter of the mandrel, the improvement comprising adjusting the molecular weight of the polyurethane to from about 20,000 to about 80,000 and adjusting the weight ratio between the polyurethane and the tetraethoxyorthosilicate to from about 1.8 to about 2.3.
A sleeve adapted to fit over a mandrel to form a blanket cylinder for use in an electrophotographic process, the sleeve comprising:
- a. a sleeve having a sidewall of a polymer selected from the group consisting of thermoplastic, thermoset and elastomeric polymers, rigid polyurethanes and blends thereof, the sleeve having an inner diameter from about 1 to about 20 percent less than the outer diameter of the mandrel;
- and
- b. an outer coating comprising a ceramer containing a polyurethane and tetraethoxyorthosilicate, the polyurethane having a molecular weight from about 20,000 to about 80,000 with the polyurethane and the tetraethoxyorthosilicate being present in a weight ratio from about 1.8 to about 2.3.
Dependencies are inferred from the claim text.