A kind of preparation technology of white flour kraft paperboard

Abstract

The invention provides a woolen cloth cleaning process for producing white-faced kraft paper. The process is characterized in that a first cleaning agent is used for cleaning upper woolen cloth, a second cleaning agent is used for cleaning lower woolen cloth, and a third cleaning agent is intermittently used for cleaning the lower woolen cloth. The process can effectively solve the contamination problem of the upper and lower woolen cloth, organic and inorganic pollutants accumulated in the woolen cloth are removed, and the porosity and absorbability of the woolen cloth are improved, so that the dewatering performance of the woolen cloth is improved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and relates to a preparation process of white-faced kraft cardboard, in particular to a felt cleaning process for producing white-faced kraft cardboard. Background technique [0002] White-faced kraft linerboard belongs to the category of packaging paper. It has unique characteristics in printing and finishing. It has high whiteness, high strength, good ink absorption, and excellent printability. It not only has good packaging protection. In the white flour kraft production process, the surface layer uses DMOW pulp, which contains less stickies. Calcium carbonate is added to the surface layer slurry to improve the whiteness of the surface layer. The bottom layer uses OCC pulp, which contains more stickies. When the paper is dehydrated, more dirt in the water will block the felt, causing the felt to be dirty and affect the dehydration effect of the paper. To solve the problem of felt dirt, cur...

AI Technical Summary

Problems solved by technology

In the white flour kraft production process, the surface layer uses DMOW pulp, which contains less stickies. Calcium carbonate is added to the surface layer slurry to improve the whiteness of the surface layer. The bottom layer uses OCC pulp, which contains more stickies. The paper is dehydrated. More dirt in the water will block the felt, causing the felt to be dirty and affect the dehydration effect of the paper. In order to solve the problem of felt dirt, currently the main method is to use high-pressure water and alkaline felt cleaning agent to clean the felt

[0003] Due to the difference in the bottom layer of the surface, the dirt adhered to the surface of the upper and lower felts is different. The main component of the dirt on the upper and lower felts is calcium carbonate, and the main component of the dirt is stickies when the lower felt is in contact with the back. The upper and lower felts use alkali Mild felt cloth cleaners are less effective at removing stains containing calcium carbonate

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