Method for manufacturing cast-coated paper
AssigneeMitsubishi Paper Mills Limited
InventorsNobu Yasuda, Masafumi Masuda, Tomoichi Morita
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Abstract
High quality cast-coated paper is obtained with high productivity by applying an aqueous coating composition containing a coating pigment and a binder to the surface of base paper by means of a blade coater to form an undercoating layer, the application rate being from 5 to 25 g/m.sup.2 on dry basis per side; then applying to said undercoating layer an aqueous coating composition containing a coating pigment and a polymer latex having a glass transition point of 38.degree. C. or higher to form an overcoating layer, drying said overcoating layer at a temperature below the glass transition point of the latex in said overcoating layer; and subjecting it to mirror finish treatment at a temperature higher than said glass transition point.
Claims11
A method for manufacturing cast-coated paper, which comprises applying at least one undercoating of an aqueous coating composition containing coating pigments and a binder to at least one side of the base paper to form at least one undercoating layer, at least one of the undercoatings being applied by means of a blade coater and the application rate of the undercoating being 5 to 25 g/m.sup.2 on dry basis per side;
- then applying onto the undercoating layer an overcoating of an aqueous coating composition containing coating pigments and a polymer latex having a glass transition temperature of 38.degree. C. or higher;
- drying the overcoating at a temperature below the glass transition temperature of the polymer latex;
- and subjecting it to a mirror finishing treatment at a temperature higher than said glass transition temperature to obtain a cast-coated paper having a specular gloss greater than 15% at an incident angle of 20.degree..
Dependencies are inferred from the claim text.