METHOD FOR ENHANCING WHITENESS OF COAED PAPER OR PAPERBOARD BY MEANS OF STARCH

摘要

A method for enhancing the whitening efficiency of fluorescent whitening agent in two-layer or multilayer coated paper or paperboard by means of starch is provided. The content of starch in a base coating is 3-20% by total weight of the base coating. The content of fluorescent whitening agent in a top coating is 0.1-2.0% by total weight of the top coating. Because the method utilizes the characteristics that the starch can retain the fluorescent whitening agent on the surface of the coated paper and can partly or completely replace synthetic latex adhesive, the method is in favor of environmental protection, and greatly reduces the production cost of coated paper or paperboard.