Title:
プリントスルーの低下を示す製紙配合物用炭酸カルシウム／顔料の組成物
Document Type and Number:
Japanese Patent JP5703222
Kind Code:
B2
Abstract:
The present invention relates to mixtures of two distinct porous, stable aggregates and rather coarse PCCs (precipitated) calcium carbonate pigments (such as a composition comprising a blend or mix of one of the two Grade B or Grade C PCCs, in combination with a second, specific S-PCC (S=scalenohedral type PCC) pigment in a ratio appropriately selected between 90/10 and 10/90 percent by dry weight, namely 80/20 and 20/80, with a coarser, third component, which may be a pigment and/or a filler such as natural calcium (ground) carbonate or (most preferably) a PCC (precipitated calcium carbonate), depending on the granulometry of the two fine PCCs the third, coarser component, may be omitted. The main criteria for selecting the said "coarser" pigment is that it should feature a granulometry which does no affect noticeably, when in admixture with the blend PCC Grade B (or PCC Grade C) with S-PCC the finest part of the granulometry data of the blend, and in particular that it should not contribute anything significant to the amount of particles <0.2 mum, preferably nothing <0.3 mum, more preferably nothing <0.5 mum and most preferably nothing <1 mum.
Inventors:
Gain, Patrick Arthur Chayers
Sielkov, Joachim
Rauffmann, Maximilian
Paul, Michael
Sielkov, Joachim
Rauffmann, Maximilian
Paul, Michael
Application Number:
JP2011525642A
Publication Date:
April 15, 2015
Filing Date:
September 08, 2009
Export Citation:
Assignee:
OMYA International AG
International Classes:
D21H17/67; D21H19/38
Domestic Patent References:
| JP2001087639A | ||||
| JP2005511916A | ||||
| JP7509684A | ||||
| JP2009528192A |
Foreign References:
| WO2007100481A1 | ||||
| WO1999061703A1 |
Attorney, Agent or Firm:
Kawaguchi International Patent Office