... polymer copolymer, used for the sizing between paper and paper board. Surface sizing agent can significantly improve paper waterproof performance, obviously ... , white cardboard, coated paper, kraft board paper and high-strength corrugated paper, and be able to replace the imported products of this ... , the moisture shoule be controlled at about 6.0-8.5. 7) To avoid rapid drying. 8)Prevent from frozen in ...