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

6/194, 42/3

B41M 5/26 (2006.01) B41M 5/337 (2006.01)

Patent

CA 1218504

Abstract of the Disclosure Disclosed is a filler for a heat-sensitive recording paper, which comprises an amorphous silicate having a composition represented by the following oxide molecular ratio: M0 : SiO2 = 0.01 : l to l.l : l wherein M stands for at least one member selected from the group consisting of calcium, barium and zinc, or a product obtained by partially neutralizing said silicate with carbonic acid, said filler having a BET specific surface area of 10 to 70 m2 /g and a bulk density of 0.14 to 0.30 g/cc and also having such a secondary particle size distribution that secondary particles having a size smaller than 4 µm, as determined by the centrifugal precipitation method, occupy at least 70 % by weight of the total particles.

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