PRODUCTION OF COATED PAPER

PURPOSE:To obtain a coated paper having excellent stable whiteness and color tone by using a starch paste having an extremely low degree of coloring even in the case of preserving the starch paste at a high pH and at a high temperature by stably retaining the starch paste at a low viscosity. CONSTIT...

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Bibliographische Detailangaben
Hauptverfasser:	KURODA TAKIO, YAMADA SHINYA
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES IMPREGNATING OR COATING OF PAPER METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING POLISHES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a coated paper having excellent stable whiteness and color tone by using a starch paste having an extremely low degree of coloring even in the case of preserving the starch paste at a high pH and at a high temperature by stably retaining the starch paste at a low viscosity. CONSTITUTION:This method for producing the coated paper comprises impregnating or coating base paper with a coating solution using a starch paste which is obtained by making an aqueous dispersion of starch into paste by heating and contains thiourea dioxide. The added amount of thiourea dioxide is preferably 0.05-2wt.% based on the solid content of starch. A thermally chemically denatured starch using ammonium persulfate is especially excellent in making the starch paste into paste under heating.