Method of Adding Calcium Carbonate Suspension on-line to Decrease Coefficient of Variation of Cigarette Paper Air Permeability

Abstract

The invention provides a method for reducing the variation coefficient of the air permeability of cigarette paper through the online addition of a calcium carbonate suspension. The method is characterized in that the method concretely comprises the following steps: processing calcium carbonate and dilution water to prepare a calcium carbonate suspension; allowing the calcium carbonate suspension to go through a calcium carbonate suspension main and a calcium carbonate suspension main branch to enter a headbox dilution water device for mixing with the dilution water to obtain a diluted calcium carbonate suspension, adjusting the opening degree of a calcium carbonate suspension adjusting valve arranged on the calcium carbonate suspension branch according to the online determination result of the variation coefficient of the air permeability of paper, and automatically adjusting the addition amount of the calcium carbonate suspension; and allowing the diluted calcium carbonate suspension and a slurry to enter a turbulence generator together, and carrying out guniting up-papermaking through a lip zone to obtain cigarette paper. The method does not reduce the whiteness, strength, quantification and opacity of the cigarette paper, realizes the uniform distribution of the transverse calcium carbonate concentration of the cigarette paper and reduces the variation coefficient of the air permeability of the cigarette paper.

Description

technical field [0001] The invention relates to the technical field of cigarette paper manufacturing, in particular to a method for adding calcium carbonate suspension on-line to reduce the coefficient of variation of air permeability of cigarette paper. Background technique [0002] At present, the coefficient of variation of air permeability is one of the important indicators of cigarette paper. The national standard GB / T12655-2007 requires that the coefficient of variation of air permeability of grade A cigarette paper should be ≤8%. It is controlled below 4%, and there is a certain gap between domestic and foreign countries in the coefficient of variation of air permeability of cigarette paper. Domestic methods to reduce the coefficient of variation of air permeability of cigarette paper are mainly considered from the aspects of raw materials, beating, paper machine, auxiliary materials and water quality in the production process. The PCC content in the finished cigaret...

AI Technical Summary

Problems solved by technology

The method of adding PCC in the production process of cigarette paper is to add in pulp, the method is single and fixed, the concentration distribution is uneven, and the retention rate is not high. The cigarette paper produced has problems such as low air permeability and large coefficient of variation.

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