Printing paper for industrial rotary inkjet printing press and method for producing printed material

Patent metadata

Field	Value
Publication number	US-2016271985-A1
Application number	US-201615046800-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Mar 20, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

Printing paper for an industrial rotary inkjet printing press is provided that has superior printability with respect to an offset printing press, and has superior color density uniformity, inhibition of ink strike-through and dot reproducibility with respect to an industrial rotary inkjet printing press using water-based pigment ink. The printing paper for an industrial rotary inkjet printing press comprises a base paper and at least one coating layer containing pigment, binder and water-soluble polyvalent cation salt on at least one side of the base paper, wherein at least one of the pigment is kaolin having an average particle diameter of 0.20 μm to 1.50 μm, and the content of the kaolin in the coating layer is 50 parts by weight or more based on 100 parts by weight of the pigment in the coating layer, the content of the water-soluble polyvalent cation salt in the coating layer is 1.0 parts by weight to 6.0 parts by weight based on 100 parts by weight of the pigment in the coating layer, and the surface resistivity on the coating layer side of the printing paper in an environment at 23° C. and 50% RH as determined basically in compliance with JIS K 6911:2006 is 2.0×10 10 Ω to 5.0×10 12 Ω.

First claim

What is claimed is:

1 . Printing paper for an industrial rotary inkjet printing press, comprising
a base paper and at least one coating layers containing pigment, binder and water-soluble polyvalent cation salt on at least one side of the base paper, wherein, at least one of the pigment is kaolin having an average particle diameter of 0.20 μm to 1.50 μm, and the content of the kaolin in the coating layer is 50 parts by weight or more based on 100 parts by weight of the pigment in the coating layer, the content of the water-soluble polyvalent cation salt in the coating layer is 1.0 parts by weight to 6.0 parts by weight based on 100 parts by weight of the pigment in the coating layer, and the surface resistivity on the coating layer side of the printing paper in an environment at 23° C. and 50% RH as determined basically in compliance with JIS K 6911:2006 is 2.0×10 10 Ω to 5.0×10 12 Ω.

2 . A method for producing a printed material, comprising the steps of:
obtaining the printing paper for an industrial rotary inkjet printing press according to claim 1 , and obtaining a printed material by printing on the printing paper with an industrial rotary inkjet printing press using water-based pigment ink.

Assignees

• Mitsubishi Paper Mills Ltd

Inventors

• Nagoshi Masanori

Classifications

• B41M5/5254

  characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• B41M5/502 Primary

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title

• B41F11/00 Primary

  Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination · CPC title

• B41J2/01

  Ink jet · CPC title

• B41M5/50

  Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording {(printing on organic plastics using a printer's form B41M1/30; printing on pre-treated paper with a printer's form B41M1/36)} · CPC title