Patent EP0442567A2 successfully refreshed from Google Patents.
EP0442567A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrophotographic printing media
Assignee: Arkwright Inc
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Filing: 1991-02-08
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Granted: —
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Expires: 2011-02-08
Abstract
Abstract A medium for electrophotographic printing or copying comprising a polymeric substrate coated with a polymeric coating having a Tukon hardness of about 0.5 to 5.0 and a glass transition temperature of about 5° to 45°C., said coating containing at least one pigment which provides a coefficient of static friction of from 0.20 to 0.80 and a coefficient of dynamic friction of from 0.10 to 0.40. The medium of the invention has improved image quality and toner adhesion. It is particularly useful in laser electrophotographic printing.
Inventors
- 👤 Kang Sun
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; G03G7/0013; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/31504
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
A film suitable for use in an electrophotographic imaging process having improved image quality and toner adhesion which comprises a polymeric substrate coated on at least one side with a polymeric coating having a Tukon hardness of from about 0.5 to about 5.0 and a glass transition temperature of from about 5°C. to about 45°C., said coating containing at least one pigment which provides a surface-to-backing or surface-to-surface coefficient of static friction of from about 0.20 to 0.80 and a coefficient of dynamic friction of from about 0.10 to 0.40 thereto.
Claim 2
Dependent Claim
16 words
The film according to claim 1, wherein the polymeric coating comprises at least one acrylic resin.
Claim 3
Dependent Claim
18 words
The film according to claim 1, wherein said pigment is a crystalline polyolefin pigment or an inorganic pigment.
Claim 4
Dependent Claim
20 words
The film according to claim 3, wherein said pigment is selected from the group consisting of polyethylene, polypropylene and polytetrafluoroethylene.
Claim 5
Dependent Claim
23 words
The film according to claim 3, wherein said pigment is selected from the group consisting of calcium carbonate, kaolin, aluminum hydroxide and silica.
Claim 6
Dependent Claim
53 words
The film according to claim 1, wherein the polymeric coating further comprises a conductive or anti-static agent selected from the group consisting of sulfonated polystyrene, copolymers of dimethyl diallyl ammonium chloride and diacetone acrylamide, poly(dimethyl diallyl ammonium chloride), quaternary cellulose acetate, quaternary acrylics and copolymers of dimethyl diallyl ammonium chloride and N-methyl acrylamide.
Claim 7
Dependent Claim
23 words
The film according to claim 1, wherein the polymeric coating further comprises a hydrocarbon surface active agent or a fluorocarbon surface active agent.
Claim 8
Dependent Claim
38 words
The film according to claim 6, wherein the conductive or anti-static agent in the coating provides a surface resistivity to the medium of about 1 x 10⁷ to 1 x 10¹⁴ ohms/sq. at 50% relative humidity and 20°C.
Claim 9
Dependent Claim
15 words
The film according to claim 1, wherein said polymeric substrate is a poly(ethylene terephthalate) film.
Claim 10
Dependent Claim
32 words
The film according to claim 1, 2 or 9, wherein the polymeric coating has a Tukon hardness of from 1.0 to 4.0 and a glass transition temperature of from 15° to 40°C.
Claim 11
Dependent Claim
32 words
The film according to claim 1, which has a removable backing sheet adhesively adhered to the non-imaging side of the film, said backing sheet being comprised of paper or a polymeric film.
Claim 12
Dependent Claim
17 words
The film according to claim 1, which has a polymeric backing, said backing being a polymer coating.
Claim 13
Dependent Claim
99 words
A film suitable for use in an electrophotographic imaging process having improved image quality and toner adhesion which comprises a polymeric substrate coated on at least one side with a polymeric coating having a thickness of about 0.05 to about 0.5 mils, said polymeric coating having a Tukon hardness of about 0.5 to about 5.0 and a glass transition temperature of from about 5°C. to about 45°C. and containing at least one pigment which provides a coefficient of static friction of from about 0.20 to 0.80 and a coefficient of dynamic friction of from about 0.10 to 0.40 thereto.
Claim 14
Dependent Claim
16 words
The film according to claim 13, wherein the polymeric coating comprises at least one acrylic resin.
Claim 15
Dependent Claim
32 words
The film according to claim 13 or claim 14, wherein the polymeric coating has a Tukon hardness of from 1.0 to 4.0 and a glass transition temperature of from 15° to 40°C.
Claim 16
Independent Claim
82 words
A method for electrophotographic printing or copying which comprises using in said electrophotographic printing or copying a polymeric substrate having a continuous polymeric coating, said coating having a Tukon hardness of from about 0.5 to about 5.0 and a glass transition temperature of from about 5°C. to about 45°C., said coating containing at least one pigment which provides a coefficient of static friction of from about 0.20 to 0.80 and a coefficient of dynamic friction of from about 0.10 to 0.40 thereto.
Claim 17
Dependent Claim
29 words
The method according to claim 16, wherein the polymeric coating has a Tukon hardness of from 1.0 to 4.0 and a glass transition temperature of from 15° to 40°C.
Claim 18
Dependent Claim
19 words
The method according to claim 16 or claim 17, wherein the polymeric coating comprises at least one acrylic resin.
References Cited (Backward Citations)
No citation records indexed.
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