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Filament bundle for degrading cigarette, preparation method thereof, and preparation method of filter stick

A technology for tow and cigarette, which is applied in the fields of degradable cigarette tow and its preparation and preparation of filter rod, and can solve the problems of poor heat resistance of polylactic acid and the like

Active Publication Date: 2010-08-18
马鞍山同杰良生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the above problems, the present invention overcomes the problem of poor heat resistance of polylactic acid, and provides a degradable tow for cigarettes and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The spinning polymer consists of a blend of 50 parts of poly-L-lactide and 50 parts of poly-D-lactide in parts by weight. Among them, the number-average molecular weights of poly-L-lactide and poly-D-lactide are 72,000 and 71,000 respectively, and the contents of residual lactide monomers are 0.5%wt and 0.4%wt respectively, and the degree of racemization is 1 % within. The blend is prepared by a melt blending method, and the mass ratio of poly-L-lactide and poly-D-lactide is 50:50. 1%wt crystallization accelerator is added, and the crystallization accelerator is a blend of poly-L-lactic acid and poly-D-lactic acid, which is prepared by a solution blending method. The number-average molecular weight is about 800, and the particle size is 2500 mesh.

[0055] The preparation process of the crystallization accelerator adopts any one of solution blending or melt blending.

[0056] Solution blending process: Dissolve the required blended oligomer in an organic solvent with ...

Embodiment 2

[0065] The physical properties of 40 parts of poly-L-lactide and 60 parts of poly-D-lactide are the same as in Example 1, and the mass ratio of poly-L-lactide and poly-D-lactide is 40:60. 1.0% wt of crystallization accelerator is added, the crystallization accelerator is a blend of poly-L-lactic acid and poly-D-lactic acid, the number average molecular weight is about 800, and the particle size is 2500 mesh. There are two melting points of the blend, which are 175℃ and 205℃ respectively, and the melting enthalpy ratio of the two is 1:7.5, which is mainly due to the existence of stereocomplex structure mixture and homopolymer.

[0066] The parameters of the spinning machine are the same as in Example 1, the temperature of the screw is controlled at 220-230°C, the temperature of the box is 230°C, the spinning speed is 150m / min, the dry air at 25°C is blown outward to cool, and the drum enters the 5th roller after oiling In the stretching machine, the temperature of the water bat...

Embodiment 3

[0070] The physical properties of 60 parts of poly-L-lactide and 40 parts of poly-D-lactide are the same as in Example 1, the crystallization accelerator is a blend of poly-L-lactic acid and poly-D-lactic acid, and the physical properties of the crystallization accelerator are the same as in Example 1 . 1% wt of crystallization accelerator is added, the crystallization accelerator is a blend of poly-L-lactic acid and poly-D-lactic acid, the number-average molecular weight is about 800, and the particle size is 2500 mesh. The blend also exhibits two melting points, 175°C and 205°C, respectively.

[0071] The parameters of the spinning machine are the same as in Example 1, the temperature of the screw is controlled at 220-230°C, the temperature of the box is 230°C, the spinning speed is 150m / min, the dry air at 25°C is blown outward to cool, and the drum enters the 5th roller after oiling In the stretching machine, the temperature of the water bath is controlled at 55°C, and th...

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Abstract

A filament bundle for degrading cigarette comprises raw materials including any one of the follows: poly(l-lactide) with crystallization accelerating agent, poly(r-lactide) with crystallization accelerating agent, and mixture of poly(l-lactide) and poly(r-lactide) with crystallization accelerating agent. The preparation method comprises the following steps: (1) drying and crystallizing at 60-120 DEG C for 10-24 hours; (2) fusing spinning at 60-120 DEG C to get protogenetic filament bundles for 10-24 hours; (3) stretching and controlling to the stretching time to be 1.5 to 3 and the trunk density of the filament bundles to be 3.0-5.0ktex; (4) crimping by a crimping machine at 40-70 DEG C, and controlling the curving number to be 18-28 / 25mm; and (5) baking for thermoforming at 60-100 DEG C within 10 min. The filament boundle is opened and cemented to produce a filter stick with the curing time within 50min.

Description

technical field [0001] The invention relates to a degradable cigarette tow, a preparation method thereof, and a filter rod preparation method, in particular to a biodegradable polylactic acid tow for cigarettes, a preparation method of the tow, and a filter rod preparation method. Background technique [0002] At present, the commercially used filter rod materials in the domestic market are mainly cellulose acetate fiber and polypropylene fiber, with a total amount of nearly 300,000 tons, of which cellulose acetate fiber accounts for more than 80%. Due to its excellent performance, it is mainly used in In high-end cigarettes, however, cellulose acetate fiber is mainly dependent on imports, and there is a large market gap, so the market has derived polypropylene fiber as a substitute material for use in low-end cigarettes. [0003] The cellulose acetate tow used for cigarette filters has the following advantages: 1) the tow is easy to be bonded into a filter rod, and the bind...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F8/14D01F1/10D01D5/253A24D3/02A24D3/08
Inventor 王秦峰任杰许克强程焱吕效东郁晓
Owner 马鞍山同杰良生物材料有限公司
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