Modified starch
Modified starch is the use of physical, chemical and enzymatic means to change the properties of natural starch to make it meet the needs of various applications in various industries. China has produced pre-dextrinized starch, acidified starch, oxidized starch, etherified starch, esterified starch, cross-linked starch and grafted starch, which are used in more than 70 varieties in textile, paper, food, petroleum, medical, construction, agricultural feed and daily chemical industries. They are mainly used as wet additives, interlayer or surface sprays, surface sizing agents and coating adhesives. They significantly improve the physical strength of paper, improve the quality and grade, reduce the ratio of wood pulp, improve the retention rate of fine fibres and fillers, improve the ash, whiteness and opacity of finished paper, reduce wet end breakage, reduce the emission of three wastes and improve printing performance.