Method for preparing environment-friendly cigarette tows

A technology for tow and tobacco, which is applied in the field of preparation of environmentally friendly tobacco tow, can solve the problems of non-conformity with global sustainable development and domestic conditions, poor adhesion performance, insufficient drying, etc.

Active Publication Date: 2012-06-13
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

[0004] Cellulose acetate filter has the following disadvantages: 1) It is derived from wood (the growth cycle is generally greater than 5 years), and a large amount of use will destroy the ecological environment; 2) Although cellulose acetate is degradable, the degradation cycle is usually more than 4 years, so the filter rod Discarding will cause certain environmental pollution; 3) The solution spinning method is used for spinning, the production process is complicated, and there are environmental problems such as solvent acetone volatilization and recovery; 4) Processes, equipment, related technologies and some finished tows mainly rely on imports
[0005] There are many deficiencies in polypropylene filters: 1) polypropylene is derived from non-renewable resource petroleum, which does not meet global sustainable development and domestic conditions; 2) polypropylene is a non-polar material with poor adsorption performance, and the obtained filter rod Poor filtering performance, which is not conducive to human health; 3) Due to the non-polarity and high crystallinity of polypropylene fiber, the bonding performance is poor, and the process of bonding the tow into a filter rod is complicated
[0010] 1) The drying is insufficient, resulting in the water content of the finished tow exceeding 10%wt, which is higher than the water content standard

Method used

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  • Method for preparing environment-friendly cigarette tows

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1: Process investigation of polylactic acid

[0044] First of all, it needs to be explained that the raw material of the present invention can be commercially available, preferably polylactic acid (where the dextrorotatory D component is 0-3% by weight), or polylactic acid (where the dextrorotatory D component is 100% by weight). The content is 0-3%) blends or copolymers with other materials (where the polylactic acid part accounts for more than 70%wt).

[0045] In order to better design the tow preparation process of polylactic acid, the characteristics of polylactic acid have been deeply studied.

[0046] 1. The relationship between the physical properties of polylactic acid and the content of D-component

[0047] The synthetic raw material of polylactic acid, lactic acid or the intermediate lactide, has stereoisomerism. Therefore, polylactic acid should be a homopolymer of the same optically active monomer or a copolymer of different optically active monomers. Main ...

Example Embodiment

[0058] Example 2: Preparation method of modified polylactic acid tow

[0059] 1. The raw material slice is polylactic acid (component D content is 1%wt), intrinsic viscosity 1.53dl / g, melt index 23.5g / 10min (210℃, 2160g), glass transition temperature 62℃, melting temperature 170℃.

[0060] 2. The preparation process of tow is:

[0061] 1) In the range of 70-110℃, dry crystallization with stepped temperature rise (heating rate is 5℃ / h, the temperature remains unchanged when the temperature reaches 110℃), the time is 12 hours, and the water content in the polymer is 70ppm;

[0062] 2) Melt spinning, the number of holes in the spinneret is 12000, the spinneret hole is trilobal, the temperature of the spinning screw is controlled at 235±1℃, the box temperature is 230±1℃, and the spinning speed is 65m / min , The roller is oiled, the roller speed is 16m / min, the oil concentration is 1%; the cooling air adopts inner ring radiation cooling, the cooling temperature is 20±1℃, and the wind pressu...

Example Embodiment

[0067] Example 3: Preparation method of polylactic acid tow

[0068] 1. The raw material slices are commercially available Polylactic acid from Natureworks, the brand is 6400D.

[0069] 2. The preparation process of tow is:

[0070] 1) In the range of 50-90℃, dry crystallization with stepped temperature rise (the heating rate is 5℃ / h, the temperature remains unchanged when the temperature reaches 90℃), the time is 18 hours, and the water content in the polymer is 85ppm;

[0071] 2) Melt spinning, the number of holes in the spinneret is 12000, the spinneret holes are trilobal, the temperature of the spinning screw is controlled at 225±1℃, the box temperature is 220±1℃, and the spinning speed is 65m / min , The roller is oiled, the roller speed is 16m / min, the oil concentration is 1%; the cooling air adopts inner ring radiation cooling, the cooling temperature is 18±1℃, and the wind pressure is 700Pa;

[0072] 3) Five rolls with a draft preheating of 65±1℃ (using roller built-in heating, h...

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Abstract

The invention relates to a method for preparing environment-friendly cigarette tows, which comprises the following steps of: drying and crystallizing, melting spinning, drafting and tension-finalizing, crimping, drying and thermal finalizing, wherein the drafting and tension-finalizing step employs a roller built-in heating way. The cigarette tows prepared by the method disclosed by the invention are higher in temperature of the crimping and the drying and thermal finalizing process steps in the preparation of the tows, shorter in production period, and improved in quality. And meanwhile, control of moisture can facilitate hot processing de-polymerization and hydrolysis degrees of polylactic acid, as a result, the spinning performance of the modified polylactic acid and the performance of tow products are improved.

Description

technical field [0001] The invention relates to the field of cigarettes, in particular to a method for preparing environmental-friendly tobacco tow. Background technique [0002] The development of filter tip is the product of cigarette development to a certain stage. When the filter first appeared, it was mainly used as a mouth-shaped part of the cigarette for decoration. With the development of cigarette technology and people's pursuit of low-harm cigarettes, the filter has gradually changed from a dispensable position to an indispensable part of cigarettes, and has assumed the function of reducing tar and harm. [0003] At present, the filter materials used commercially 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%, but cellulose acetate fiber and polypropylene fiber Fiber has the following disadvantages: [0004] Cellulose acetat...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D1/00D01D5/16D01D5/253A24D3/08
Inventor 王秦峰荣先奎许克强吕效东
Owner 马鞍山同杰良生物材料有限公司
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