Use of ground limestone as a filler in paper

Details Use of ground limestone as a filler in paper Use of ground limestone as a filler in paper

1975-05-14

1977-05-31

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Non-fiber additive

106306, D21D 300, C04B 3102

Patent

active

040267628

ABSTRACT:
Combinations of fine particle size precipitated CaCO.sub.3 and coarser natural ground limestones, up to about 35% ground limestone, have the same opacifying power in paper as does 100% precipitated CaCO.sub.3, provided the ground limestone has the proper particle size distribution.

REFERENCES:
patent: 1350694 (1920-08-01), Alton et al.
Casey "Pulp & Paper," vol. II, (1960) pp. 987 and 988.
Nakata et al., "Studies on Papermaking by use of Surface Sizing Tech.," ABIPC, vol. 42, No. 8, (1972) Abstr. No. 8034.
Huggenberger et al., "Innovations in Coat. Mat'ls. (1) Pig. from Nat. Cal. Carbonate," ABIPC, vol. 44, (1974), Abstr. No. 7203.

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