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US 7,201,938 B2Granted
Thermosensitive stencil paper and method of producing the same
AssigneesRicoh Company, Ltd., Tohoku Ricoh Co., Ltd.
InventorsFumiaki Arai, Takehiko Iwaoka, Yuji Natori, Masanori Rimoto
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Abstract
A thermosensitive stencil paper having a thermoplastic resin film and a porous resin layer which is provided on the thermoplastic resin film by coating a porous resin layer formation coating liquid including a water-in-oil emulsion of a resin on the thermoplastic resin film and drying the coating liquid. In addition, the method of producing the above-mentioned thermosensitive stencil paper is also disclosed.
Claims8
A method of producing a thermosensitive stencil, comprising the steps of:
- coating a thermoplastic resin film that is perforable by use of a thermal head with a porous resin layer formation coating liquid comprising a water-in-oil emulsion of a polyvinyl butyral resin, said emulsion having a continuous oil phase and a discontinuous water phase and said resin being present in said continuous phase and not in said discontinuous phase, and
- drying said coating liquid, thereby providing said porous resin layer on a thermoplastic resin film.
A method of producing a thermosensitive stencil paper comprising the steps of:
- dissolving a polycarbonate polyurethane resin in a mixed solvent of toluene and isopropyl alcohol with stirring so as to prepare a resin solution,
- adding a non-solvent to said resin solution with stirring so as to prepare a water-in-oil emulsion of the resin, said emulsion having a continuous oil phase and a discontinuous water phase and said resin being present in said continuous phase and not in said discontinuous phase,
- coating a thermophlastic resin film that is perforable by use of a thermal head with said emulsion, and
- drying said emulsion, thereby providing a porous resin layer on said thermoplastic resin film.
1 more element
Dependencies are inferred from the claim text.