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公开(公告)号：JP5351586B2
公开(公告)日：2013-11-27
申请号：JP2009085669
申请日：2009-03-31
Applicant: 日本製紙株式会社
CPC classification number: D21H17/25 , C08B15/02 , D21H11/18 , D21H19/10 , Y10T428/31971 , Y10T428/31982 , Y10T428/31993
Abstract: A papermaking additive comprising cellulose nanofibers whose aqueous solution at a concentration of 2% (w/v) has a B-type viscosity (60 rpm, 20°C) of 500 to 7000 mPa·s, preferably 500 to 2000 mPa·s is used to prepare a paper having improved air resistance and smoothness. This additive is prepared by oxidizing a cellulosic material with an oxidizing agent in the presence of (1) N-oxyl compound(s) and (2) bromide, iodide or a mixture thereof to prepare oxidized cellulose, and finely grinding the oxidized cellulose in a wet condition to convert the oxidized cellulose into nanofibers.
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公开(公告)号：JP5047458B2
公开(公告)日：2012-10-10
申请号：JP2004350477
申请日：2004-12-02
Applicant: 日本製紙株式会社
IPC: D21H19/38
CPC classification number: D21H19/38 , Y10T428/24802 , Y10T428/24934 , Y10T428/27 , Y10T428/273
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