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Method for making fiber-based cigarette filter

A cigarette filter and fiber-based technology, applied in e-liquid filter elements, tobacco, applications, etc., can solve the problems of difficulty in inserting filter rods, inability to realize industrialization, poor adsorption effect, etc., and increase the time of retention and filtration , good cohesion, and the effect of improving the adsorption effect

Active Publication Date: 2019-01-29
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can reduce the toxicity of cigarettes, the rush is easy to break, the process of inserting the filter rod is difficult, and it cannot be industrialized, and only through the porous structure for physical adsorption, the adsorption amount of harmful substances in the smoke is small, and the adsorption effect is not good.
[0008] At present, the mechanism of action of the rush filter only stays in physical adsorption using its network structure. Although it has a good effect, there is still a gap compared with the chemical adsorption caused by adding additives, which is mainly reflected in the adsorption. selectivity and overall

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0035] Preparation of e-fiber based cigarette filter

[0036] Cut the rushes modified in step d into strips, the length of the strips is 2-3cm, and they are closely arranged into cylinders along the axial direction. After being pressed by a filter rod forming machine, they are covered with filter forming paper to obtain a fiber-based Cigarette filter, wherein the fiber-based cigarette filter contains 20-30 modified strip-shaped rushes.

[0037] The average molecular weight of the polyvinylpyrrolidone is 80000-130000.

Embodiment 1

[0039] According to the above process steps: form a mixed solution with ethanol and water at a mass ratio of 90:10, and stir the mixed solution at a speed of 100 r / min for 1 min at room temperature to obtain a washing solution. Dissolve polyvinylpyrrolidone with an average molecular weight of 80,000 in a 95:5 absolute ethanol / water mixed solution to form a mixed solution with a mass fraction of 3%. The mixture was stirred at a speed of 8 hours for 8 hours, and defoamed for 8 hours in an environment with a vacuum degree of 0.05 MPa to obtain a modified solution. The rush fibers were immersed in the washing liquid, ultrasonically treated at 20 kHz and 10°C for 15 minutes, and then placed in an oven at 40°C for 4 hours to obtain pretreated rush fibers. Put the pretreated rush fiber in the Buchner funnel, under the infiltration of the modified solution, filter it with a negative pressure of 0.3MPa for 3min, then put it in the refrigerator at -40℃ for 6h, take it out and put it in ...

Embodiment 2

[0041] According to the above process steps: form a mixed solution with ethanol and water at a mass ratio of 91:9, and stir the mixed solution at a speed of 50 r / min for 3 minutes at room temperature to obtain a washing solution. Dissolve polyvinylpyrrolidone with an average molecular weight of 90000 in a 94:6 absolute ethanol / water mixed solution to form a mixed solution with a mass fraction of 5%. Stir at a speed of min for 6 hours, and defoam for 9 hours in an environment with a vacuum degree of 0.06 MPa to obtain a modified solution. The rush fiber was immersed in the washing liquid, ultrasonically treated at 30kHz and 15°C for 16min, and then placed in an oven at 45°C for 5h to obtain the pretreated rush fiber. Place the pretreated rush fiber in a Buchner funnel, and infiltrate it with the modified solution, filter it with a negative pressure of 0.35MPa for 3.5min, then put it in a refrigerator at -37°C for 7h, take it out and put it put into a freeze dryer with a vacuum...

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Abstract

The invention relates to a method for making a fiber-based cigarette filter and belongs to the technical field of cigarettes. According to the method, firstly, a mixed solution of isopropanol and water is adopted for pretreating a juncus roemerianus fiber, then the pretreated juncus roemerianus fiber is soaked in an aqueous / alcoholic mixed solution of polyvinylpyrrolidone for suction filtration and freezing drying, and the modified juncus roemerianus fiber is obtained; the modified juncus roemerianus fiber is cut into trip-shaped fibers strip-shaped fibers with equal length, the strip-shaped fibers are compactly arrayed into a cylinder in the axial direction, pressed by a filter rod formation machine and then wrapped by filter formation paper, and the fiber-based cigarette filter is obtained. The made filter is of a compact porous structure and has no obvious influence on suction and resistance of the cigarettes, raw materials are natural and degradable, physical porous channel interception is combined with chemical complexation adsorption, and harmful components of tar and smoke can be effectively reduced.

Description

technical field [0001] The invention relates to a method for preparing a fiber-based cigarette filter, belonging to the technical field of cigarettes. Background technique [0002] The pollution and health hazards caused by smoking have become an urgent problem in the world. Tobacco smoke is a mixture of more than 3800 compounds, which are aerosols composed of volatile, semi-volatile and non-volatile compounds in the gas phase. Smokers smoke because they are addicted to nicotine. However, in addition to nicotine, cigarette smoke also contains various toxic compounds that cause diseases and cancer in smokers. Although many efforts have been made in the development of cigarette filters at home and abroad for many years, most cigarette filters are still made of cellulose acetate. However, common acetate filters are not effective at removing toxic compounds from smoke. In order to improve the removal efficiency, people began to add additives such as activated carbon, zeolite...

Claims

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Application Information

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IPC IPC(8): A24D3/02A24D3/06
CPCA24D3/0208A24D3/0212A24D3/067
Inventor 徐卫林付专夏良君周思婕刘斯年
Owner WUHAN TEXTILE UNIV
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