Polyacrylamide (PAM) dispersion mechanism due to carboxyl content in the molecular chains of PAM and has the ability to reduce the surface tension of the role, helps the water of solid wetting, which for fiber and filler in water dispersion is particularly advantageous, when PAM slurry, can make fiber, filler is formed on the surface of the bilayer structure outer dispersion agent and extreme water has strong affinity, increase the water wetting degree of fiber, filler of solid particles. The fiber, filler and other solid particles are far away from the electrostatic repulsion, to achieve good dispersion effect.Polyacrylamide (PAM) has a wide range of applications in the paper industry. Because of the negative charge of PAM, the PAM can be used as an additive in the paper. The average relative molecular weight is 500000 ~ 1000000. The average relative molecular weight is 4000000 ~ 2000000. The PAM is usually used as the wet end of paper machine.  

    APAM is a kind of linear organic polymer, its water solution is colloidal, has a certain viscosity. The main mechanism is to increase the viscosity of the slurry, equivalent to the fiber surface attached to a thin layer of lubrication film and played in the water soluble lubricant, the fiber slide past each other and not tangle; increased suspension viscosity also increased fiber in the medium of suspension, prolonged fiber settlement; the increase of the viscosity of the slurry greatly limits the fiber in the movement of water in degrees of freedom, so that the fiber does not contact with each other, reduce the fiber flocculation, improve the fiber forming mixed ability. According to the action mechanism and the exploration in the use process, the viscosity of APAM aqueous solution is an important factor to affect the performance of its use, and the higher the viscosity is, the better the dispersion effect is. The main reason for the influence of the solution viscosity is that the higher the molecular weight is, the higher the viscosity of aqueous solution is, the higher the concentration is, the higher the concentration is, the higher the viscosity is, the time and the shape of the leaves are affected. The method of increasing the ionic type of Polyacrylamide in the majority of the method of copolymerization.      PAM use before the dissolution of the previous article are discussed, this time to talk about the use of polyacrylamide PAM as a dispersant for the use of methods and precautions. Adding PAM must be uniform, uniform and dispersed to join, join the speed can not be too fast, the general 0.15kg min around as appropriate. PAM added to water at the same time to a certain pressure water into the add the location, after adding the water immediately diluted and dissolved, reach the best result of dissolving.

    General dosage of PAM solution is in the mixing tank, mixing tank is mixed the pulp and white water equipment), its concentration is paper machine for pulp concentration on the Internet, where PAM, can quickly evenly mixed with the slurry to achieve the ideal dispersion effect. If it is added to the mixed pulp chamber PAM, the slurry in the reach of the high box, to always maintain a certain pulp, so that the longitudinal quantitative analysis of the paper. And fiber slurry is easy to deposit, and easy to produce flocculation, the slurry which makes high box showing varying degrees of whey separation phenomenon, in the slurry through automatic discharging door, the vast dry pulp through changes in the volume of large, leading to page longitudinal quantitative fluctuation is large enough to affect the paper of the relevant physical index, so that the product is not ideal or even scrap. After practice verification. In the mixed pulp bin added some general dosing PAM solution is in the mixing tank, mixing tank is mixed the pulp and white water equipment), its concentration is paper machine for pulp concentration on the Internet, where PAM, can rapidly and uniformly with the slurry is mixed to the ideal dispersion effect. If it is added to the mixed pulp chamber PAM, the slurry in the reach of the high box, to always maintain a certain pulp, so that the longitudinal quantitative analysis of the paper. And fiber slurry is easy to deposit, and easy to produce flocculation, the slurry which makes high box showing varying degrees of whey separation phenomenon, in the slurry through automatic discharging door, the vast dry pulp through changes in the volume of large, leading to page longitudinal quantitative fluctuation is large enough to affect the paper of the relevant physical index, so that the product is not ideal or even scrap. After practice verification, in the mixed slurry warehouse to join a certain.