Invention Grant
- Patent Title: Coated printing papers and processes for preparing them
- Patent Title (中): 涂布印刷纸及其制备工艺
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Application No.: US14008086Application Date: 2012-03-22
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Publication No.: US09034435B2Publication Date: 2015-05-19
- Inventor: Kazuhiko Ishizuka , Osamu Kozuka , Ryo Sotooka , Susumu Kato
- Applicant: Kazuhiko Ishizuka , Osamu Kozuka , Ryo Sotooka , Susumu Kato
- Applicant Address: JP Tokyo
- Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
- Current Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Roylance Abrams, Berdo & Goodman, L.L.P.
- Priority: JP2011-071778 20110329
- International Application: PCT/JP2012/057287 WO 20120322
- International Announcement: WO2012/133088 WO 20121004
- Main IPC: D21H23/48
- IPC: D21H23/48 ; D21H21/28 ; D21H19/66 ; D21H19/72 ; D21H19/38 ; D21H11/08 ; D21H11/14

Abstract:
The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability.According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.
Public/Granted literature
- US20140023844A1 COATED PRINTING PAPERS AND PROCESSES FOR PREPARING THEM Public/Granted day:2014-01-23
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