Method for reproducing paper pulp used for filter stick core paper by utilizing filter stick waste

Abstract

The invention discloses a method for reproducing paper pulp used for filter stick core paper by utilizing filter stick waste, which includes procedures of material treatment, impregnation, defibrination, washing and concentration. Impurities in the filter stick waste are eliminated, and the filter stick waste is cut off into particles of 1-150 mm; the particles are impregnated by 4-10 times of water for 5-30 minutes under 70-100 degree C; inorganic base with weight being 0.5%-6% of dry weight of the particles is added into the impregnation liquid, so that the chemical concentration of the impregnation liquid is 0.25g-3g / L; the pulp liquid is concentrated to 10%-30%, and then pan-grinding defibrination is performed; and finally, the pulp liquid is washed and concentrated to 20-30%, so that the paper pulp used for wet process papermaking cigarette filter stick filter material can be obtained. The method disclosed by the invention has low treatment requirement for the impurities in the raw material, dispenses with molding paper stripping procedure, uses no toxic solvent, has high paper pulp yield, is excellent in fiber evenness, has centralized length distribution and uniform pulp, has no paper fragments and fiber beams, has excellent dispersion property, and is very suitable for making the filter stick core paper.

Description

technical field [0001] The invention belongs to the technical field of tobacco processing, further belongs to the technical field of cigarette filter material processing, and specifically relates to a method for regenerating pulp for filter plug core paper by utilizing waste materials such as discarded filter rods or filter rods. Background technique [0002] Filter rod is an indispensable and important part of cigarette products, which plays the role of intercepting particulate matter, filtering harmful components and modifying smoke. Diacetate cellulose tow is currently the most widely used filter rod filter material. The filter rod made of it has good elasticity, moderate hardness, high filtration efficiency, and has no effect on cigarette smoking. In addition, due to the tobacco industry's stricter control over the tar content of cigarette products, more and more attention has been paid to the filter rods of paper filter materials. It is expected that the utilization rat...

AI Technical Summary

Problems solved by technology

The above-mentioned technologies all adopt the same idea, that is, to reclaim cellulose acetate by dissolving the cellulose acetate in the waste with a solvent. Although there is a good dissolving effect, there are also two main defects: the one is that it uses the toxic organic solvent acetone, which is difficult to dissolve, recycle, etc. The process is harmful to the health of operators; the second is that the content of impurities in the spinning of recycled materials or the preparation of colloidal particles is very strict, and it is difficult to remove impurities and the cost is high

This method is relatively simple in process and low in energy consumption, but there are two main disadvantages: one is that it is difficult to remove the forming paper, and it is difficult to clean it, which affects the carding of bundles; the other is that the fibers are carded after cutting. There are a large number of fiber overlaps and splices in the longitudinal direction, resulting in differences in the total denier of the fibers at each position in the longitudinal direction of the bundle, resulting in poor stability of the suction resistance of the prepared filter rod and a high coefficient of variation

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