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Title:
THERMAL RECORDING PAPER
Document Type and Number:
Japanese Patent JP3707562
Kind Code:
B2
Abstract:

PURPOSE: To obtain excellent solid black color forming uniformity, in thermal recording paper wherein a specific thermal color forming layer is arranged on the upper surface of a support, by forming the support from specific paper and arranging a specific undercoat layer between the support and the thermal color forming layer.
CONSTITUTION: Thermal recording paper is constituted by arranging a thermal color forming layer based on a leuco dye and a developer on the upper surface of a support. In this case, the support is formed from paper composed of raw material pulp containing 3wt.% or more of old paper pulp prepared using mechanical pulp type old paper as a raw material and an undercoat layer is arranged between the support and the thermal color forming layer. The undercoat layer is formed from a coating soln. based on pigment and a binder and having viscosity of 500cps due to a B-type viscometer by a nip touch type rod coat system supporting the undercoat layer to weigh the same. As the pigment used in the undercoat coating soln., a hollow filler is selected.


Inventors:
Kimura Shigeaki
Aimi Suzuki
Shinobu Miyauchi
Yukihiro Yuyama
Application Number:
JP9677593A
Publication Date:
October 19, 2005
Filing Date:
March 31, 1993
Export Citation:
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Assignee:
株式会社リコー
International Classes:
B41M5/28; B41M5/26; B41M5/30; B41M5/40; (IPC1-7): B41M5/26
Domestic Patent References:
JP465288A
JP595093A
Other References:
紙パルプ技術協会編 「紙パルプ技術便覧」第5版 1992年1月30日 第340-357頁
原崎勇次著 「コーティング方式」 第1版 槇書店 1985年11月30日 第3頁、第56頁
室井宗一著 「紙塗工 高分子ラテックスの応用」 第1版 高分子刊行会 1992年1月20日 第124-141頁
加工技術研究会編 「コーティングのすべて」 加工技術研究会 1999年12月3日 第24-27頁
Attorney, Agent or Firm:
Koichi Hirota