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Method for recycling and reusing cellulose diacetate waste silk for cigarettes

A technology of cellulose diacetate and waste silk, which is applied in the direction of rayon recovery, fiber treatment, fiber chemical characteristics, etc., can solve the problems of high operating cost, complicated treatment process, and difficulty in popularization and application, and achieves improvement of filtration performance and cost reduction. Effect

Active Publication Date: 2021-05-07
上海展恒环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art: the focus of reuse of cellulose diacetate waste silk or discarded filter rods is to remove the glycerol triacetate, the processing process is complicated, the operation cost is high, and it is difficult to popularize and apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for reclaiming and reusing cellulose diacetate waste silk for cigarettes, comprising the steps of:

[0033] Prepare waste silk / DMAc solution with a mass fraction of 20%, stir at room temperature for 6 hours, control the spinning temperature at 45°C, humidity at 40%, and electrospinning at 25kV, spinning distance 25cm, winding speed The nanofibers were deposited on the PET base cloth at 20m / min, and the average diameter of the obtained fibers was 250nm. The obtained nanofiber composite tow was rolled into a filter rod on a filter rod forming machine, and further rolled into a sample cigarette.

Embodiment 2

[0035] A method for reclaiming and reusing cellulose diacetate waste silk for cigarettes, comprising the steps of:

[0036] Mix the waste silk / butanone solution with a mass fraction of 12%, stir at room temperature for 6 hours, control the spinning temperature at 30°C, humidity at 45%, electrospinning at a voltage of 20kV, spinning distance 10cm, winding and receiving The speed is 20m / min, the nanofibers are deposited on the polylactic acid non-woven fabric, and the average diameter of the obtained fibers is 210nm. The obtained nanofiber composite tow was rolled into a filter rod on a filter rod forming machine, and further rolled into a sample cigarette.

Embodiment 3

[0038] A method for reclaiming and reusing cellulose diacetate waste silk for cigarettes, comprising the steps of:

[0039] Prepare a waste silk / DMSO solution with a mass fraction of 25%, stir at room temperature for 8 hours, control the spinning temperature at 40°C, humidity at 35%, and electrospinning at a voltage of 30kV. The spinning distance is 30cm, and the winding receiving speed is 20m / min, the nanofibers are deposited on the polyethylene terephthalate non-woven fabric, and the average diameter of the obtained fibers is 300nm. The obtained nanofiber composite tow was rolled into a filter rod on a filter rod forming machine, and further rolled into a sample cigarette.

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Abstract

The invention relates to a method for recycling and reusing waste cellulose diacetate for cigarettes. The method comprises: dissolving waste cellulose diacetate for cigarettes that has not been removed from triacetin in an organic solvent to obtain cellulose diacetate waste The spinning solution is electrospun and rolled into a filter rod for cigarettes. The recovery method of the present invention avoids the cost and complexity brought by the triacetin removal process, and dissolves the cellulose diacetate waste silk for cigarettes that has not been removed from triacetin in an organic solvent for electrospinning The original triacetin in the waste silk is also uniformly dissolved in the spinning solution, which not only does not hinder the spinning, but also plays a certain role in supporting, strengthening and shaping the cellulose diacetate after spinning. The invention realizes the recycling of the waste silk of the cigarette filter, which not only protects the environment but also reduces the cost.

Description

technical field [0001] The invention relates to the technical field of cigarette auxiliary material processing, in particular to a method for recycling waste cellulose diacetate for cigarettes. Background technique [0002] During the production of cigarette filters, a large amount of cellulose diacetate waste silk scraps will be produced, which contains about 10% of triacetin and mineral oil and other additives. The viscous mixed liquid composed of triacetin, mineral oil and other additives is insoluble in water and can partially dissolve cellulose diacetate. After curing, the cellulose diacetate forms a certain three-dimensional structure, which plays a role in supporting and strengthening the shape. However, for traditional acetate spinning, triacetin will destroy the Y-shaped cross-sectional shape of the tow, affect the diameter and specific surface area of ​​the fiber, and finally affect the adsorption performance of the fiber. Therefore, it is difficult to reproduce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01F13/04A24D3/04
CPCA24D3/04D01D5/003D01D5/0076D01F13/04D04H1/728Y02P70/62
Inventor 陈耀岐秦建国张秀芳徐岚陈越成张建超
Owner 上海展恒环保科技有限公司
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