Tow with high crimp index for polylactic acid cigarette and preparation method for tow

A crimp index, polylactic acid cigarette technology, applied in the manufacture of rayon, single-component polyester rayon, application, etc., can solve the problems of low rod yield, low economic benefit, poor heat resistance stability, etc. Crystallinity and thermal properties, the effect of increasing the crystallization rate, strong adsorption capacity

Inactive Publication Date: 2012-10-03
ZHENGZHOU TOBACCO RES INST OF CNTC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, there are several patents on polylactic acid tobacco tow in China. In the patent number: 200610131699.0 "A Cigarette Filter Tow and Its Preparation Method", the process of spinning polylactic acid resin raw materials into polylactic acid tobacco tow is introduced. and method; in Patent No.: 200710055310.3 "A Filter Stick for Cigarettes and Its Preparation Method", it is introduced that the tow of polylactic acid cigarettes is prepared by opening, bonding, wrapping, cutting and post-treatment to prepare filter sticks for polylactic acid cigarettes method, but there are some unsolvable problems in these two patents
For example, in the process of spinning polylactic acid tow from polylactic acid resin raw materials, it needs to be crimped and dried at high temperature to improve its crimping performance and physical and mechanical properties, and the mechanical properties of polylactic acid materials at high temperatures Poor performance, poor heat resistance stability, and cannot withstand high temperature processing, resulting in poor performance of the spun polylactic acid tow for cigarettes. Therefore, under the same requirements of filter rod suction resistance, circumference and hardness, more must be filled Under the same conditions, compared with the filter rods made of cellulose diacetate and polypropylene tobacco tow, the weight of a single polylactic acid filter rod is 0.1-0.3 grams / piece, which is equivalent to a higher rod yield. 200,000 to 500,000 sticks per ton; this also brings problems such as increased consumption of auxiliary materials, increased packaging and transportation costs, and reduced economic benefits, which have greatly restricted the application of polylactic acid tobacco tow in cigarettes

Method used

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  • Tow with high crimp index for polylactic acid cigarette and preparation method for tow
  • Tow with high crimp index for polylactic acid cigarette and preparation method for tow

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Select a polylactic acid resin with a melting index of 2.58g / 10min and a melting point of 168°C, and dry it at 80°C for 8 hours with a vacuum drum dryer, and the moisture content is less than 100ppm; White powder and hydrated magnesium silicate superfine powder are dried until the moisture is less than 200ppm, the drying temperature is 58°C, and the drying time is 8 hours; the above-mentioned raw materials after drying are mixed, and the raw material composition includes 99.85 wt% polylactic acid; 0.10wt% nano-scale Titanium dioxide, 0.05wt% hydrated magnesium silicate superfine powder; melted and filtered at 210°C, and quantitatively fed into the spinning assembly through a metering pump. The number of spinneret holes is 11400, and the shape of the spinneret holes is trilobal; The cooling air at ℃ is used for cooling and forming, and the oil agent is coated on the surface of the tow by the upper oil tanker; the tow is wound at a winding speed of 550m / min and temporarily...

Embodiment 2

[0043] Select a polylactic acid resin with a melt index of 2.72g / 10min and a melting point of 167°C, and dry it at 80°C for 8 hours with a vacuum drum dryer, and the moisture content is less than 100ppm; White powder and hydrated magnesium silicate superfine powder are dried until the moisture is less than 200ppm, the drying temperature is 55°C, and the drying time is 8 hours; the above-mentioned raw materials after drying are mixed, and the raw material composition includes 99.75 wt% polylactic acid; 0.15 wt% nano-scale Titanium dioxide, 0.10wt% hydrated magnesium silicate superfine powder; melted and filtered at 215 ° C, quantitatively fed into the spinning assembly through a metering pump, the number of spinneret holes is 11400, and the shape of the spinneret holes is trilobal; 11 The cooling air at ℃ is used for cooling and forming, and the oil agent is coated on the surface of the tow by the upper oiler; the tow is wound at a winding speed of 450m / min and temporarily store...

Embodiment 3

[0045] Select a polylactic acid resin with a melting index of 2.37g / 10min and a melting point of 170°C, and dry it at 80°C for 8 hours with a vacuum drum dryer, and the moisture content is less than 100ppm; White powder and hydrated magnesium silicate superfine powder are dried until the moisture is less than 200ppm, the drying temperature is 58°C, and the drying time is 8 hours; the above-mentioned raw materials after drying are mixed, and the raw material composition includes 99.75 wt% polylactic acid; 0.10wt% nano-scale Titanium dioxide, 0.15wt% hydrated magnesium silicate superfine powder; melted and filtered at 210 ° C, quantitatively input into the spinning assembly through a metering pump, the number of spinneret holes is 13200, and the shape of the spinneret holes is trilobal; 11 The cooling air at ℃ is used for cooling and forming, and the oil agent is coated on the surface of the tow by the upper oiler; the tow is wound at a winding speed of 450m / min and temporarily s...

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Abstract

The invention discloses a tow with a high crimp index for a polylactic acid cigarette and a preparation method for the tow. The tow is prepared from the following raw materials by a melt spinning method: 99-100 percent by weight of polylactic acid, 0.1-0.5 percent by weight of nanoscale titanium dioxide, 0.1-0.5 percent by weight of hydrated magnesium silicate ultrafine powder, wherein the linear density of the tow is 3.5-5.0 ktex, the linear density of a single filament is 2-5 dtex, the crimp number is 18-28/25 mm and the crimp index is 0.45-0.65. According to the tow and the preparation method disclosed by the invention, a nucleating agent is added into a polylactic acid raw material, so that the crystallization rate is increased and the crystallinity degree and the thermal performance of fibers are improved, and further the crimp temperature in the subsequent spinning crimp work procedures is increased to 85-95DEG C and the crimp performance is improved; and the crimp index of the whole tow is improved to about 0.55. The tow with high crimp index for the polylactic acid cigarette has better crimp performance; and under the same conditions, unit weight tows can be used for preparing more filter rods, and thus the economic benefits are increased.

Description

[0001] technical field [0002] The invention relates to a cigarette filter tip material and a preparation method thereof, in particular to a polylactic acid tobacco tow with a high curl index and a preparation method thereof. Background technique [0003] Cigarette filters are an important part of cigarettes. As a filter material for cigarettes, in addition to good spinnability, there are many unique requirements: (1) The filter rod rolled from it is non-toxic, tasteless and safe; (2) The tow has good stability, It can meet the requirements of filter rod forming equipment and technology; (3) It has suitable rigidity and crimping properties, so that it has good elasticity and openability. After the sticky agent is added, the filter stick meets certain hardness, suction resistance and appearance quality requirements, has a high rod yield, and has practical value; (4) During the cigarette smoking process, the filter tip does not collapse or deform; (5) Filter The rod has a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01D1/00D01D5/08D01D5/088D02J1/22D02G1/00D02G1/20A24D3/08
Inventor 刘惠民包旭东杨松赵献忠聂聪何映鸣
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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