Method and apparatus for finishing coated papers

Details Method and apparatus for finishing coated papers Method and apparatus for finishing coated papers

1979-12-26

1981-07-07

Lusignan, Michael R.

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

118 60, 118 66, 118 67, 118 69, 118101, 118115, 118117, 427366, 4273743, 427391, 4273981, B05D 300, B05D 302, B05D 312, B05C 1102

Patent

active

042775248

ABSTRACT:
An aqueous coating composition containing thermoplastic synthetic resin emulsion is applied to a paper web to form a coating layer and dried at a temperature to maintain the coating layer below the glass transition temperature of the thermoplastic synthetic resin emulsion. The coated paper web is passed on a finishing roll having a mirror-like metal surface heated to a temperature above the glass transition temperature of the emulsion. The surface of the coating layer of the coated paper web is brought into pressing contact with the finishing roll and heated to a temperature above the glass transition temperature of the emulsion, while the coated paper web is passed on the finishing roll. The coated paper web is cooled until the temperature of the surface of the coating layer is reduced to a level not exceeding the glass transition temperature of the emulsion by 30.degree. C., and passed over the finishing roll again after the cooling step is followed, whereby the coated surface of the coated paper web is finished to have super-high-gloss and high smoothness.

REFERENCES:
patent: 3330688 (1967-07-01), Halsey et al.
patent: 3583881 (1971-06-01), Kennedy
patent: 3873345 (1975-03-01), Vreeland
patent: 3982056 (1976-09-01), Holder
patent: 4041197 (1977-08-01), Gagne
patent: 4048380 (1977-09-01), Blakey et al.

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