Imaging medium comprising polycarbonate, method of making, method of imaging, and image-bearing medium
AssigneeMinnesota Mining and Manufacturing Company
InventorDavid T. Ou-Yang
Life of this patent
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Abstract
A polymeric imaging medium comprising a receptor layer and a polycarbonate backing layer particularly useful in electrophotographic printing processes with liquid toners comprising thermoplastic toner particles in a liquid carrier that is not a solvent for the particles at a first temperature and that is a solvent for the particles at a second temperature or with dry toner, making the imaging medium in the substantial absence of ultraviolet radiation, method of imaging, and such an imaged medium which contains ultraviolet light stabilizers.
Claims47
An imaging medium comprising:
- (a) a receptor layer, wherein the receptor layer comprises:
- (I) a polymer(s) wherein each polymer independently comprises the polymerization product of a composition comprising (i) ethylene, (ii) monomer(s) selected from the group consisting of vinyl acetate, vinyl acrylate, and mixtures thereof, (iii) optionally a vinyl carboxylic acid(s), (iv) optionally an anhydride;
- and
- (II) 0 to about 3 percent by weight of an ultraviolet light stabilizer selected from the group consisting of ultraviolet light absorbers, ultraviolet light inhibitors, and mixtures thereof, based upon the total weight of the receptor layer;
- wherein the receptor layer has a melt index of at least about 2.5 grams/10 minutes;
- and
- (b) a polycarbonate backing layer bonded to the receptor layer;
- wherein the receptor layer is bonded to the backing layer in the substantial absence of ultraviolet radiation, and
- wherein the composition of the receptor layer is selected such that the T-peel adhesion of the receptor layer to the polycarbonate backing layer is at least about 358 g/cm, and such that at least one of the following is true:
- (i) the Taber abrasion resistance test value for an image electrophotographically formed on the receptor layer with a liquid toner is at least about 6;
- (ii) the Taber abrasion resistance test value for an image electrophotographically formed on the receptor layer with a dry thermoplastic toner is at least about 6.
A method of making an imaging medium comprising the step of:
- bonding a polycarbonate backing layer to a receptor layer in the substantial absence of ultraviolet light radiation, wherein the receptor layer comprises:
- (I) a polymer(s) wherein each polymer independently comprises the polymerization product of a composition comprising (i) ethylene, (ii) monomer(s) selected from the group consisting of vinyl acetate, vinyl acrylate, and mixtures thereof, (iii) optionally a vinyl carboxylic acid(s), (iv) optionally an anhydride;
- and
- (II) 0 to about 3 percent by weight of a component selected from the group consisting of ultraviolet light absorbers, ultraviolet light inhibitors, and mixtures thereof, based upon the total weight of the receptor layer;
- wherein the receptor layer has a melt index of at least about 2.5 grams/10 minutes;
- and
- wherein the composition of the receptor layer is selected such that the T-peel adhesion of the receptor layer to the polycarbonate backing layer is at least about 358 g/cm, and such that at least one of the following is true:
- (i) the Taber abrasion resistance test value for an image formed on the receptor layer with a liquid toner is at least about 6;
- (ii) the Taber abrasion resistance test value for an image formed on the receptor layer with a solid toner is at least about 6.
Dependencies are inferred from the claim text.