If a person on its own, if the relationship between exposure to the outside of the collective, to stay out of the scope of any great thoughts of unity of the people, will become lazy, conservative, and hostile to the development of human life. Paper dry strength agents are widely used in packaging paper (cardboard, kraft paper, etc.), cultural paper and other manufacturing, can effectively improve the paper dry strength, improve the physical properties of paper. While the fines and fillers to help stay and bond, reducing fiber loss and reduce the "lint" "dusting" phenomenon. It can produce a sufficient dry strength allowing the use of low secondary fiber raw materials or a higher proportion of fibers. Application process over and play the following roles: 1. Paper can improve tensile strength, physical indicators bursting strength, ring crush strength; 2. Increase and improve retention of fine fibers and fillers; 3. Improve the sizing effect Rosin; 4. Broke easily recovered. Overview: paper and paperboard for enhancing the strength of a class of chemicals known as fine paper reinforcer, depending on the effect of reinforcing the paper can be divided into two types of dry-wet strength agent and strong, its enhanced mechanisms are also different. Dry strength agents in the paper industry is to increase the strength of the paper another important chemicals, many water-soluble fiber can form hydrogen bonds with the polymer can be a combination of dry strength agent. Dry strength agents are generally used to compensate for the low level of added fillers or fibers (e.g., regenerated fiber) decreased sheet strength caused. First, the paper dry strength agents to enhance the mechanism of natural and synthetic dry strength agents are mostly hydrophilic polymer, these polymer dispersed between the fibers increases the amount of the bond between the fibers, so as to achieve the purpose of improving the strength of paper. Most contain dry strength agents connected to the main link cationic groups, thus increasing the binding force between polymers and fibers, increased retention of the polymer. The most commonly used dry strength agents are natural polymers such as starch and modified products thereof (such as cationic starch, anionic starch), synthetic polymers such as polyacrylamide, glyoxal polyacrylamide and polyvinyl alcohol, and other water-soluble natural product class dry strength agents. In most cases, only the mass fraction of 0.1% to 0.35% of such substances can achieve effective dry strength effect. China currently places anionic polyacrylamide and modified starch based. Strength of the paper is affected by many factors, first of all depends on the strength of a paper itself is the binding force between fibers and fiber, as well as the arrangement and distribution of the paper fibers. The most important is the binding force between the fibers, the fibers are generally binding force, there are four: the chemical bonds, hydrogen bonds, van der Waals forces and interwoven fiber surface. Wherein hydrogen bonding is the main way binding strength of paper produced, a considerable number of hydroxyl groups of the cellulose molecule, by hydrogen bonds between each other to form numerous microfibers binding force is great, this is the main reason for dry strength generated. Dry strength agents are mostly containing polyhydroxy polymer from which the characteristics of the molecular structure of view, this is the basis for the formation of hydrogen bonding between the cellulose molecules and, dry strength agents in the molecule hydrogen bond with the surface of the fiber-forming groups hydroxyl groups form hydrogen bonds. Such as the free hydroxyl groups of starch glucose involved in the formation of intermolecular hydrogen bond of cellulose fiber surface, thus increasing the binding force of the starch inside the fibers, the binding surface of the natural fiber between the two beams increases the number of hydrogen bonds. While dry strength agents for sheet forming process has some role to improve the dry strength agents act as efficient dispersant at this time, that dry strength agents make pulp fiber distribution is more uniform, provide more fiber and fiber between high binding molecules, thereby increasing the dry strength. Two, polyacrylamide dry strength agent is applied to polyacrylamide is acrylamide homo- or copolymerized with other monomers to produce a mass fraction of 50% or more of water-soluble polymer. Its production methods are mainly three kinds: aqueous polymerization, inverse emulsion polymerization method and radiation. PAM is acrylamide (AM) or copolymerization with other monomers to produce a mass fraction of 50% or more of water-soluble polymer. According to the type of functional groups, PAM divided into non-ionic, anionic (APAM), cationic (CPAM) and amphoteric four categories. PAM has easily hydrolyzed, easy to use, environmentally friendly, etc., it can be used as paper enhancer, retention and drainage and so on. However, PAM electrically neutral, can not be effectively adsorbed on the pulp fibers, thus the need for the ionization process is used as a paper strength agent. Commonly used methods are: to get through the hydrolysis of the amide group-containing portion of the carboxyl group of anionic polyacrylamide (A2PAM); Hof2mann degradation reaction by Mannich reaction or cationic polyacrylamide (CPAM); or co-generation by acrylamide and other monomers anionic, cationic or amphoteric polyacrylamide. National toll-free: 400-770-3343 polyacrylamide: www.lebangshui.com www.gylbjs.com Contact: Mr. Wang Mobile: 13838568817 Tel: 0371-66488876 Manager Wu Mobile: 13783609559 Tel: 0371-66488833