Papermaking chemicals are the general name of various chemical agents and auxiliaries used in papermaking. Including the content of the more extensive, both the pulping chemicals (such as cooking agent, deinking agent, etc.), dipping paper chemicals (such as sizing agent and wet strength agent, etc.), paper processing chemicals (such as fungicides, defoaming agent, coating agent) and pollution treatment chemicals such as four major categories. The aim is to improve paper quality and production efficiency, improve operating conditions, reduce manufacturing costs, increase economic benefits and develop new paper species.
Paper industry is a traditional light industrial industry, due to the consumption of paper and production levels also represents a national and regional economic and cultural development level, papermaking industry and national economy presents synchronous development situation. China's paper and cardboard production has increased from 30.5m tonnes in 2000 to 86.4m tonnes in 2010, and nearly tripled in 10 years, making it the world's largest producer of paper making. China's paper products also grew at an 18% rate, making it the world's second-largest paper consumer. With the increasing proportion of papermaking chemicals in papermaking industry, the average annual growth rate of papermaking chemicals is expected to be about 9%. The market for paper chemicals will exceed 50 billion by 2015. The industry of papermaking chemicals is optimistic in the domestic market.
The positive charge of cationic starch binds it to a negatively charged matrix, and it can adsorb and hold the negatively charged other additives on the substrate. Cotton fiber in the machining process, and metal parts of friction, often with a negative charge, for hydrophobic synthetic fiber is more serious, if the use of positive charge cationic starch sizing, will not only have good bonding strength, but also has the effect of eliminating static electricity.
Cationic starch is used for warp sizing abroad. For example, cationic compound transmutability starch, which is before cationic modification, dissociates starch to obtain the starch with low viscosity, then the cationic degeneration. There are also amphoteric derivatives, namely using cationic and anionic denatured agents to treat starch double. The product contains both cationic groups and anionic groups.
1, cationic starch, often referred to as starch under certain conditions (often referred to as etherifying agent) and cationic reagent reaction of products, mainly include tertiary amine salts cationic reagent and quaternary ammonium salt cationic reagent
2, amine compounds, and hydroxyl of starch molecules and etherification reaction with amino ether derivatives on the nitrogen atoms with a positive charge, the ether derivatives has many properties of starch does not have, have a tendency to attraction with negatively charged substances, known as the cationic starch
3, has a tendency to be attraction with negatively charged substances, known as cationic starch. Because most of the fine particles and colloid in wastewater treatment has a negative charge, for cationic modification of starch is an important research direction
4. In the 12th period of i2000, chemical industry market unit: shenyang chemical research institute technical trading department
5, starch reaction with amine compounds containing amino and ammonium ether derivatives, the nitrogen atom with a positive charge, called cationic starch. Because of the cationic starch with negatively charged matter affinity, are widely used in papermaking, textile, mining, oil field, adhesive and cosmetics, etc. 
6, with negatively charged material attraction trend known as cationic starch. Common tertiary amine and quaternary hinge salt season as etherification agent such as aluminum salt cationic starch of tw. The higher the calcium tolerance medicament stabilization can give full play to its scale effect