Waterproofing agent that can improve the printability of paper

Changzhou Wujin Yunbo Chemical Co., Ltd. is a professional manufacturer of paper-making chemicals in China. It produces nearly 10,000 tons of various chemical additives for papermaking. The products are sold throughout the country. Recently, polyamide water-soluble polymer waterproofing agents have been introduced. They are formaldehyde-free coated papers and water-repellents for coated paperboards. It not only has better wet rub resistance than the traditionally used water repellent, but it is also a print transparency improver, which can improve the printing adaptability of the paper during printing, improve paper gloss and print gloss. Due to its short curing time, it is more suitable for high-speed printing applications that cannot be performed using conventional water repellents. The product is similar to Taiwan Poly's SR-503 and Sumitomo SUMIRCZ636. This product can replace the current melamine-formaldehyde resin commonly used in paper mills. The amount of melamine-formaldehyde resin used is 1/3 to 2/3 of the scoop.