Heat-sensitive recording paper and filler therefor

Details Heat-sensitive recording paper and filler therefor Heat-sensitive recording paper and filler therefor

B - Operations, Transporting

41

M

6/212, 42/3

B41M 5/26 (2006.01) B41M 5/337 (2006.01) C01B 33/193 (2006.01)

Patent

CA 1218506

Abstract of the Disclosure Disclosed is a filler for a heat-sensitive record- ing paper comprising finely divided amorphous silica having a BET specific surface area of 10 to 100 m2/g and a bulk density of 0 14 to 0.30 g/cc, said finely divided amorphous silica having such a secondary particle size distribution that secondary particles having a size smaller than 4 microns, as measured by the centrifugal precipitation method, occupy at least 90 % by weight of the total particles. This filler is excellent in the effects of prevent- ing the background coloration, improving the lubricating property, preventing the adhesion of scum and improving the image density.

446063

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