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Patent Searching and Data


Title:
IMPREGNATED GRADE PAPER
Document Type and Number:
Japanese Patent JP02242997
Kind Code:
A
Abstract:

PURPOSE: To obtain the subject paper producible in a large amount at a low cost even in the case of the shortage of stock of titanium dioxide by using titanium dioxide and a specific amorphous precipitated silica as main fillers.

CONSTITUTION: This paper comprises (A) titanium dioxide and (B) about 5-40 based on the component A of an amorphous precipitated silica having about 25-200 m2/g BET surface area, pH of about 6-9.5, ≤ about 30 μm medium value of particle size of aggregate and ≤ about 1 wt.% Ca (in terms of calcium oxide) as main fillers. Preferably the component B has about 40-120 m2/g BET surface area, pH of about 6.5-7.5, about 3-10 μm medium value of particle size of aggregate and the paper has about 10-25 wt.% silica content based on titanium dioxide.


Inventors:
Roger, Allen Crawford
Application Number:
JP1989000059469
Publication Date:
September 27, 1990
Filing Date:
March 10, 1989
Export Citation:
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Assignee:
PPG IND INC
International Classes:
B32B21/08; D21H17/67; (IPC1-7): B32B21/08; D21H17/67