Binary particle retention system suitable for unbleached chemical pulp

Abstract

The invention provides a binary particle retention system suitable for unbleached chemical pulp. According to the technical scheme, aiming at the physical property characteristics of unbleached chemical pulp, the components of a particle retention system are improved. Specifically, the system omprises the following components in parts by weight: 20-25 parts of polyacrylamide, 12-16 parts of kaolin, 8-10 parts of terephthalic acid, 4-6 parts of diatomite, 2-4 parts of sodium carboxymethyl cellulose, 2-4 parts of sodium hyaluronate, 1-3 parts of chitosan, 1-3 parts of monocalcium phosphate, 1-3parts of maleic acid and 1-3 parts of dimethyl fumarate. A conventional formula of a cationic polymer and an inorganic anionic colloid is abandoned, polyacrylamide and kaolin are used as core components, components such as terephthalic acid, diatomite and sodium carboxymethyl cellulose are added, and the particle retention system is constructed in a compounding mode. The system is particularly suitable for unbleached chemical pulp, the retention and drainage effects are remarkably improved, and the system has outstanding technical advantages.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a binary particle retention system suitable for unbleached chemical pulp. Background technique [0002] Microparticle retention technology appeared in the early 1980s, and achieved unexpected results after being applied to the wet end of papermaking. It has greatly improved the retention of fine fibers and fillers in paper sheets and the water filtration performance of paper sheets. At the same time, the formation of the paper sheet has also been greatly improved. As a result, this technology has gradually been valued and developed by the paper industry. In recent years, with the development of high-speed, large-scale, double-network and neutral papermaking of paper machines, especially the extensive use of waste paper and deinked pulp in recent years, a large number of fine fibers in waste paper pulp make the paper material The water drainage becomes difficult,...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical defects of the prior art, and provides a binary particle retention system suitable for unbleached chemical pulp to solve the technical problem that conventional particle retention systems are difficult to apply to unbleached chemical pulp