Method of producing medium-grade coated paper for rotogravure pr

Details Method of producing medium-grade coated paper for rotogravure pr Method of producing medium-grade coated paper for rotogravure pr

1980-05-08

1981-11-03

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427391, 428342, B32B 2308, B32B 2710, D21H 128

Patent

active

042986524

ABSTRACT:
A method of producing medium-grade coated paper for rotogravure printing, which paper, when printed, has fewer missing gravure dots and reproduction of gravure dots is improved.
The method comprises applying the following coating composition (A) or (B) to either surface or both surfaces of base paper, the fiber content of which comprises 10 to 100 parts, by weight, high-yield pulp(s) having a 42-mesh fiber fraction content of below 30%, and 0 to 90 parts, by weight, chemical pulp(s): The coating composition (A) comprises pigments containing natural ground calcium carbonate with a specific surface area of 1.5 to 2.5 m.sup.2 /g in a proportion of 5 to (95S-137.5)% by weight ("S" represents a specific surface area (m.sup.2 /g) of natural ground calcium carbonate.), and adhesive of either alkali-sensitive synthetic resin emulsion or a mixture of alkali-nonsensitive synthetic resin emulsion and viscosity increasing agent(s). The coating composition (B) comprises pigments containing natural ground calcium carbonate with a specific surface area of 2.5 to 5 m.sup.2 /g in a proportion of 5 to 100% by weight, and adhesive of either alkali-sensitive synthetic resin emulsion or a mixture of alkali-nonsensitive synthetic resin emulsion and viscosity increasing agent(s).

REFERENCES:
patent: 4046946 (1977-09-01), Shaw
patent: 4064304 (1977-12-01), Fujita et al.
patent: 4258104 (1981-03-01), Lee et al.

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