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Preparation method for cellulose carbamate fiber tow for cigarette

A carbamate, cellulose technology, applied in the direction of artificial filament made of cellulose derivatives, chemical post-processing of cellulose/protein artificial filament, rayon manufacturing, etc., can solve the problems that do not meet the requirements of sustainable development and Domestic conditions, unfavorable flue gas harm reduction and coke reduction, poor filtration effect, etc., achieve the effect of good chemical adsorption, excellent filtration performance, and easy natural degradation

Active Publication Date: 2015-05-20
HUBEI TIANSI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with cellulose acetate tow, polypropylene tow has relatively large disadvantages, such as poor adsorption performance and poor filtering effect, which is not conducive to the reduction of harm and coke of smoke in cigarettes, and its source is non-renewable Resource oil is not in line with global sustainable development and domestic conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation mass concentration is 12% sodium hydroxide and the zinc oxide aqueous solution that mass concentration is 1.0%, gets the cellulose carbamate of viscosity-average molecular weight 60000, nitrogen content 1.5wt% and is placed in above-mentioned solution, and mixture is placed in subzero 10 Stir and dissolve at low temperature at ℃ to obtain a transparent cellulose carbamate solution, which is filtered and defoamed as a spinning stock solution.

[0034] The spinning stock solution is spun on an R535 wet spinning machine. The number of spinneret holes is 11,000, and the spinneret holes are trilobal. The regeneration bath uses a mixture of 5% sulfuric acid, 15% sodium sulfate, and 80% water. liquid, the regeneration bath temperature is 40°C; deionized water is used for washing, and the water temperature is 50°C; the oil agent is edible nonionic surfactant methyl p-hydroxybenzoate with a mass concentration of 0.5%, edible oil with a mass concentration of 5.0%, ...

Embodiment 2

[0038] The preparation mass concentration is 8% sodium hydroxide and the zinc oxide aqueous solution that mass concentration is 0.3%, gets the cellulose carbamate of viscosity-average molecular weight 100000, nitrogen content 2.7wt% to be placed in above-mentioned solution, and mixture is placed in subzero 10 Stir and dissolve at low temperature at ℃ to obtain a transparent cellulose carbamate solution, which is filtered and defoamed as a spinning stock solution.

[0039] The spinning stock solution is spun on an R535 wet spinning machine. The number of spinneret holes is 11,000, and the spinneret holes are trilobal. The regeneration bath uses 8% sulfuric acid with a mass concentration of 10% sodium sulfate and 82wt% water. The mixed liquid, the temperature of the regeneration bath is 45°C; the water washing is deionized water, the water temperature is 50°C; Mixture of wt% water, oil bath temperature 55°C; draft ratio 0.7.

[0040] After the tow is oiled, it enters the crim...

Embodiment 3

[0043] The preparation mass concentration is 13% sodium hydroxide and the zinc oxide aqueous solution that mass concentration is 0.1%, gets the cellulose carbamate of viscosity-average molecular weight 66000, nitrogen content 3.5wt% and is placed in above-mentioned solution, and mixture is placed in subzero 10 Stir and dissolve at low temperature at ℃ to obtain a transparent cellulose carbamate solution, which is filtered and defoamed as a spinning stock solution.

[0044]The spinning stock solution was spun on an R535 wet spinning machine. The number of spinneret holes was 11,000, and the spinneret holes were trilobal. % zinc sulfate, 86wt% water mixture, regeneration bath temperature 25 ℃; washing with deionized water, water temperature 55 ℃; Concentration 9.5% edible oil, 89wt% water mixture, oil bath temperature 52°C; draft ratio 1.0.

[0045] After the tow is oiled, it enters the crimping machine, the temperature of the crimping machine is 85°C, and the pressure of the...

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Abstract

The present invention provides a preparation method for cellulose carbamate fiber tow for cigarette. According to the method, cellulose carbamate with a viscosity-average molecular weight of 48000-100,000 and a nitrogen content of 0.1wt%-7.0wt% is dissolved in a mixed aqueous solution of sodium hydroxide and zinc oxide to give a spinning solution with a certain concentration; and by using a wet spinning technique for spinning, and a mixed solution of sulfuric acid, sodium sulphate and zinc sulphate as a regeneration bath, the cellulose carbamate fiber tow for cigarette is obtained from the spinning solution through several processes of spinning -spinning oil applying- drafting- crimping-drying. The filter rod produced by using the tow of the invention has obvious filtering effect on harmful substances in smoke, and can be used in cigarette to replace cellulose acetate fiber tow and acrylic fiber tow.

Description

field of invention [0001] The invention relates to a preparation method of cellulose urethane fiber tobacco tow. Background technique [0002] Cigarette filters play a great role in reducing harm, reducing coke and improving the quality of cigarettes, and are an indispensable part of cigarette production. At present, the filter rod materials used in the domestic market mainly include acetate fiber tow and polypropylene fiber tow. Acetate fiber contains a large number of functional groups such as acyl groups and ether groups. It has excellent water absorption and chemical adsorption properties. It is easier to form a three-dimensional network structure during the filter molding process, and its physical adsorption is also good. However, cellulose acetate tow is made of cellulose acetate produced from high-quality wood. my country's forest resources are limited, and the quality of wood is not suitable for the production of cellulose acetate. It is necessary to import a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/28D01F1/10D01F11/02A24D3/10
Inventor 汤炼王云波李道喜李雅明
Owner HUBEI TIANSI TECH
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