Technique and device for dry formation of low basis weight fluff pulp and capable of eliminating electrostatic flocculation

Abstract

The invention provides a technique and a device for dry formation of low basis weight fluff pulp and capable of eliminating electrostatic flocculation. The technique for dry formation of low basis weight fluff pulp and elimination of electrostatic flocculation within a quantitative range of from 15g / m2 to 30g / m2, a high-mesh-number woven copper net serving as a formation net is used with an electrostatic elimination device to produce a fluff pulp fiber underlayer of reconstructed tobacco, uniform formation is facilitated, electrostatic elimination is facilitated, and transfer and removal of the formed underlayer fibers from the formation net are facilitated. The technique and the device are characterized in that the formation net is a woven endless net of metal wires, zero potential nets are square-hole static-eliminated nets respectively and horizontally disposed at the top and the bottom of a cylindrical screen, and a frame grounding system is an independent equipotential system using a frame as zero potential.

Description

technical field [0001] The invention relates to a low-quantity fluff pulp dry-forming technology and device capable of eliminating electrostatic flocculation, in particular to softwood fluff pulp fiber forming heads of dry-type papermaking tobacco sheet production equipment, low-quantity forming and elimination of static flocculation The technology and device of the phenomenon belong to the technical field of tobacco sheet production in the cigarette industry. Background technique [0002] Reconstituted tobacco leaf (also known as tobacco flakes) is used as the filler of cigarette products and is an important part of cigarette formula. On the one hand, it can be used instead of tobacco leaves, save tobacco leaf raw materials, effectively reduce the natural tobacco leaf components in cigarettes, and improve the use efficiency of tobacco leaf resources. Contribute to the improvement of the intrinsic quality of cigarettes. [0003] The dry-type papermaking method reconstitute...

AI Technical Summary

Problems solved by technology

The copying and molding process of the base sheet is different due to the addition method of raw materials. There are two types of layered addition and mixed addition. ), and then add extraction slag, adhesive, surface layer and other raw materials successively on the bottom layer to make a substrate, such as the invention patent "Tobacco Sheet and Its Manufacturing Method and Manufacturing System" (application number : 00808488.2 Application date: 2000.06.02); the method described in the mixed-type addition is to fully mix the raw materials such as fluff pulp fiber and extraction slag first, and then send them to the web-forming type for airflow forming, such as the Chinese invention patent "A Kind of The method disclosed in Dry Papermaking Method Reconstituted Tobacco Leaf and Its Production Method (Application No.: 200810030146.5, Application Date: 2008.08.08), the disadvantage of this method is: the granular pulp powder and fluff pulp fiber There is a big difference in weight and physical shape between them, and there is a big difference in the shape in the forming air flow. In the actual forming process, there are problems such as extremely uneven distribution of extraction slag and outer fibers, and a lot of loss of extraction slag slurry powder.

Since reconstituted tobacco leaves require the addition of fluff pulp fibers in the range of 15-30g / ㎡, if the forming technology and equipment used in dry-laid papermaking are simply applied to the bottom layer forming of reconstituted tobacco leaves, the following problems will arise: ① bottom layer forming Difficulties, especially the fiber distribution does not meet the index requirements, the loss of fibers in the process of copying is large, and the quantification is difficult to control; ②During the air-flow sedimentation forming process of fluff pulp fibers, due to frictional static electricity and polyester mesh-induced static electricity, etc., the mesh surface The distribution of formed fibers is extremely uneven, the flocculation is serious, and the number of flocculated pulp clusters per unit area seriously exceeds the standard

The lower the basis weight, the more prominent the problem, and even the molding cannot be done; ③ The method of spraying antistatic agent to eliminate static electricity is not suitable for the control of reconstituted tobacco leaves and the requirements of raw material standards; The mesh is difficult, which affects the service life of the forming mesh

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