Surface sizing enhancer

Abstract

The invention relates to a surface sizing enhancer which is characterized by comprising the following components in parts by weight: 930-950 parts of ferrous sulfate, 2-12 parts of a combined polymer, 6-12 parts of a cationic monomer, 8-16 parts of a crosslinking agent and 6-12 parts of an initiator. The surface sizing enhancer has the beneficial effects that the surface sizing enhancer can replace partial pasty starch and can comprehensively improve the quality of paper; according to requirements of different pieces of paper, by a pasting process, 15-30 percent of starch can be replaced; compared with the conventional surface sizing enhancer, the surface sizing enhancer has the advantages that the water resistance is greatly improved; and furthermore, the annular pressure of the paper, the breakage resistance and the humidity breakage property are obviously improved. Various macromolecule copolymers are used as ligand polymers and are mixed and crosslinked with the original starch to form a whole; and during surface sizing, coating can be effectively prevented from inwards penetrating into the paper, off-machine curing is performed without influence of the environment, and a phenomenon that the paper is wetted and deforms can be well solved.

Description

technical field [0001] The invention belongs to chemical auxiliary agents for papermaking, in particular to a surface sizing enhancer. Background technique [0002] With the rapid development of my country's paper industry, the recycling of old paper has become the main source of pulp in my country. This can solve the shortage of paper pulp and overcome the harm caused by the serious pollution of straw pulp. However, the recycled old paper cellulose becomes short, which has a greater impact on paper quality. In order to solve paper cellulose defects, people add multifunctional chemical additives in sizing, its function is to reduce the water absorption and ink absorption of the paper, enhance the ring pressure, stiffness, improve the smoothness of the paper and reduce the printing adaptability Lint and powder fall off, while maintaining the dimensional stability of the paper sheet and preventing shrinkage, thereby improving the quality of paper products. In the sizing pro...

AI Technical Summary

Problems solved by technology

[0003] Usually, the surface sizing agent is composed of a variety of active monomers with different functions. The polymer formed by the copolymerization of the surface sizing agent is the current mainstream product of the surface sizing agent. This kind of surface sizing agent can be mainly divided into three types: 1. Water-soluble polymer surface sizing agent, 2. Polymer water-dispersible surface sizing agent, 3. Styrene and butyl acrylate as main monomers, using different degrees of hydrolysis to use fluorine-containing monomers as auxiliary materials Strengthening agent, and compounded with silicon solution of different degrees of hydrolysis and polyvinyl alcohol to form a surface sizing enhancer. In contrast, although this type of surface sizing agent and sizing enhancer can improve the sizing degree of paper, Stiffness, smoothness and printing adaptability, etc., and the storage stability and sizing performance are also good, but its chemical stability is low, and it is easy to be emulsified under the action of organic solutions. In addition, when mixed with each other, there will be miscibility defects. If the overall viscosity of the paper machine becomes higher, it will affect the normal operation of the paper machine

To sum up, at present, the biggest defect of sizing agents at home and abroad is that they cannot solve the problem of gradual deformation of the paper and are easily affected by external factors during the sizing process, prolonging the curing period, and deteriorating water resistance. A problem that the industry has been waiting to solve for a long time