Claims
- 1. A transfer-type electrothermographic recording method comprising the steps of:
- uniformly charging an electrothermographic recording layer of a recording medium, which exhibits chargeability A at room temperature and chargeability B above room temperature, where the chargeability A and B are in a relationship of A>B.gtoreq.0;
- forming a latent electrostatic image by applying digital thermal signals which correspond to an original image by a thermal head under an application of a bias voltage;
- developing said latent electrostatic image with a toner of which polarity is the same as or opposite to the polarity of said latent electrostatic image to form a toner image;
- transferring said toner image to a receiving medium; and
- fixing said toner image transferred on said receiving medium.
- 2. The transfer-type electrothermographic recording method as claimed in claim 1, wherein said electrothermographic recording layer comprises a material selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, cellulose acetate, polyvinyl alcohol, polyacetal, polycarbonate, a vinyl chloride - vinyl acetate copolymer, an ethylene vinyl acetate copolymer, an acrylic polymer, a styrene-based polymer, polyester, polyamide, polyimide, polyethylene, polypropylene, a polypropylene - based polymer, a perfluoroalkyl acrylate, a fluorinated-acryl - acryl copolymer, a silicone resin, a silicone rubber, a silicone wax, a silicone oil, and a styrene - acryl copolymer.
- 3. The transfer-type electrothermographic recording method as claimed in claim 1, wherein said digital thermal signals are applied by a thermal head which can yield a latent electrostatic image without reducing the electric potential of the background thereof even when brought into contact with the background.
- 4. The transfer-type electrothermographic recording method as claimed in claim 1, wherein said latent electrostatic image is developed with a toner with the same polarity as that of said latent electrostatic image.
- 5. The transfer-type electrothermographic recording method as claimed in claim 1, wherein said latent electrostatic image is developed with a toner with the opposite polarity to that of said latent electrostatic image.
- 6. The transfer-type electrothermographic recording method as claimed in claim 1, wherein said recording medium consists essentially of said electrothermographic recording layer comprising a thermoplastic resin and a lubricant selected from the group consisting of silica, calcium carbonate, graphite, molybdenum disulfide, tungsten disulfide, talc, alumina, kaolin, titanium dioxide, barium sulfate, zeolite, polystyrene, polymethylmethacrylate, polytetrafluoroethylene, polyvinylidene fluoride, polyacrylonitrile, a benzoguanamine resin, a silicone resin, carboxymethyl cellulose, starch, oleic amide, stearic amide, behenic amide, erucinic amide, elaidic amide, natural waxes, synthetic waxes and phosphoric esters incorporated into said recording layer.
- 7. The transfer-type electrothermographic recording method as claimed in claim 6, wherein said electrothermographic recording layer has a surface with a critical surface tension (.gamma.c) of 35 dynes/cm or less.
- 8. The transfer-type electrothermographic recording method as claimed in claim 6, wherein said electrothermographic recording layer comprises a material selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, cellulose acetate, polyvinyl alcohol, polyacetal, polycarbonate, a vinyl chloride - vinyl acetate copolymer, an ethylene - vinyl acetate copolymer, an acrylic polymer, a styrene-based polymer, polyester, polyamide, polyimide, polyethylene, polypropylene, a polypropylene-based polymer, perfluoroalkyl acrylate, a fluorinated-acryl - acryl copolymer, a silicone resin, a silicone rubber, a silicone wax, a silicone oil, and a styrene - acryl copolymer.
- 9. The transfer-type electrothermographic recording method as claimed in claim 6, wherein said electrothermographic recording layer has a thickness in the range of 5 .mu.m to 100 .mu.m.
- 10. The transfer-type electrothermographic recording method as claimed in claim 6, wherein said recording medium further consists essentially of at least one of a base layer and an electroconductive layer, on which said electrothermographic recording layer is supported.
- 11. The transfer-type electrothermographic recording methods claimed in claim 1 wherein said recording medium consists essentially of said electrothermographic recording layer and a lubricating layer which layer comprises a lubricant selected from the group consisting of silica, calcium carbonate, graphite, molybdenum disulfide, tungsten disulfide, talc, alumina, kaolin, titanium dioxide, barium sulfate, zeolite, polystyrene, polymethylmethacrylate, polytetrafluoroethylene, polyvinylidene fluoride, polyacrylonitrile, a benzoguanamine resin, a silicone resin, carbonxymethyl cellulose, starch, oleic amide, stearic amide, behenic amide, erucinic amide, elaidic amide, natural waxes, synthetic waxes, phosphoric esters, fluorinated-acryl - acryl copolymer, perfluoroalkyl acrylate, a silicone polymer and polyethylene on said electrothermographic recording layer.
- 12. The transfer-type electrothermographic recording method as claimed in claim 11, wherein said lubricating layer comprises a polymer or a material having a critical surface tension (.gamma.c) of 35 dynes/cm or less.
- 13. The transfer-type electrothermographic recording method as claimed in claim 17, wherein said polymer is selected from the group consisting of a fluorinated-acryl - acryl copolymer, perfluoroalkyl acrylate, a silicone polymer and polyethylene.
- 14. The transfer-type electrothermographic recording method a claimed in claim 12, wherein said material is selected from the group consisting of stearic amide, behenic amide and a polyethylene wax.
- 15. The transfer-type electrothermographic recording method as claimed in claim 11, wherein said recording medium further consists essentially of at least one of a base layer and an electroconductive layer, on which said electrothermographic recording layer is supported.
- 16. The transfer-type electrothermographic recording method as claimed in claim 15, wherein said lubricating layer comprises a polymer cr a material having a critical surface tension (.gamma.c) of 35 dyne/cm or less.
- 17. The transfer-type electrothermographic recording method as claimed in claim 16, wherein said polymer is selected from the group consisting of a fluorinated-acryl - acryl copolymer, perfluoroalkyl acrylate, a silicone polymer and polyethylene.
- 18. The transfer-type electrothermographic recording method as claimed in claim 16, wherein said material is selected from the group consisting of stearic amide, behenic amide and a polyethylene wax.
Priority Claims (4)
Number |
Date |
Country |
Kind |
1-214869 |
Aug 1989 |
JPX |
|
1-240578 |
Sep 1989 |
JPX |
|
1-284763 |
Nov 1989 |
JPX |
|
2-16171 |
Jan 1990 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/570,796, filed on Aug. 22, 1990, now abandoned.
US Referenced Citations (10)
Continuations (1)
|
Number |
Date |
Country |
Parent |
570796 |
Aug 1990 |
|