Drying cylinder surface repair agent, drying cylinder surface repairing method and drying cylinder

Abstract

The invention relates to a drying cylinder surface repairing agent. The drying cylinder surface repairing agent comprises, by mass, from 2% to 5% of metallic compound solid lubricants, from 5% to 15% of cationic polymers and from 80% to 90% of water. The drying cylinder surface repairing agent contains the metallic compound solid lubricants, the metallic compound solid lubricants have the property that the metallic compound solid lubricants in heat automatically approach metal surfaces, accordingly, in a paper drying process after the drying cylinder surface repairing agent forms a coating on the surface of a drying cylinder, the metallic compound solid lubricants in heat can be effectively attached to the surface of the drying cylinder, and defects on the surface of the drying cylinder can be effectively filled and repaired. The invention further relates to a drying cylinder surface repairing method and a repaired drying cylinder.

Description

technical field [0001] The invention relates to a drying cylinder surface repairing agent, a drying cylinder surface repairing method and a drying cylinder. Background technique [0002] The drying cylinder is a common part of the paper machine, and it is a key part for paper drying. Its function is to dry the moisture in the paper and finish the paper surface. The materials used to make drying cylinders are generally HT200 and HT250. In terms of manufacturing quality, it is required that no penetration and excessive sand holes are allowed. In order to increase the smoothness of the paper surface, it is required to polish the outer surface of the dryer and polish the inner surface to keep the thickness of the entire dryer wall consistent to ensure that the dryer Safety, balance and uniform heat transfer everywhere. [0003] However, during the use of the dryer, the abrasion of the pulp and its impurities, and the uneven scraping of the scraper will cause scratches on the s...

AI Technical Summary

Problems solved by technology

[0003] However, during the use of the dryer, the abrasion of the pulp and its impurities, and the uneven scraping of the scraper will cause scratches on the surface of the dryer.

Therefore, after the dryer has been running for a period of time, shock marks or sand holes often appear. After the paper is transferred to the dryer cylinder through the pressure roller, the shock marks or sand holes will eventually cause paper defects.

[0004] For the corrosion and wear marks on the surface of the drying cylinder, most paper mills use grinding cylinder treatment, repeated grinding cylinder has a great impact on the strength of the drying cylinder, and at the same time cannot fundamentally solve the problem

In addition, in the crepe paper production process, in order to compensate for the damage caused by the scraper to the surface of the dryer, the coating thickness of the peeling agent on the surface of the dryer is usually increased, and the peeling agent is used to fill the surface of the dryer. Shock marks or sand holes, this method requires a lot of peeling and sticking agent, which not only increases the cost of papermaking, but also has a poor filling effect on the surface of the drying cylinder

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