Cigarette filter tow and preparation method thereof

Abstract

The invention discloses a cigarette filter tow and a preparation method thereof. The cigarette filter tow comprises the main component of a blending modified polylactic acid material. The blending modified polylactic acid material comprises the following components in parts by weight: 100 parts of temperature resistant lactic acid polyester mixture, 0.5-1.2 parts of polyethylene glycol, 0.5-1.2 parts of polyhydroxyalkanoate, 2-2.75 parts of mixture of thermal stabilizer and antioxidant additive, 0.3-0.7 part of adsorbent and 0.3-0.7 part of titanium dioxide. The invention has the advantages that the thermal resistance and thermal stability of the polylactic acid material are improved because of the temperature resistant additive or a polylactic acid nucleater and the mixture of the thermal stabilizer and the antioxidant additive; in addition, the tension thermoforming is carried out on a thermal steam box at 97-103 DEG C through a stretched fiber tow, the fiber tow is sprayed by using cold water before entering a crimping machine to avoid nodositas and stiffness of the fiber tow; the curled tow is sprayed by using a spraying device which is placed behind a crimping knife, and an anti-toxic smoke solution is placed in the spraying device, therefore, the affinity and the adsorbability of the cigarette filter tow on a toxic substance can be improved.

Description

technical field [0001] The invention relates to a tow, in particular to a cigarette filter tow and a preparation method thereof. Background technique [0002] Cigarette filter is an important part of cigarettes, which can improve the taste of cigarettes and reduce the harm of harmful substances in smoke to human body. At present, the materials for making cigarette filters on the market mainly include acetate fiber and polypropylene fiber. The cigarette filter tip produced by acetate fiber has superior comprehensive performance and is mainly used for medium and high-end cigarettes. However, it uses high-quality wood as raw material, and the production process is complicated and accompanied by comparative Many pollution problems. my country's forest resources are limited, and acetate fiber cannot be self-sufficient, so it needs to be imported in large quantities every year. However, with the increasing deforestation and people's increasing awareness of environmental protectio...

AI Technical Summary

Problems solved by technology

At present, the materials for making cigarette filters on the market mainly include acetate fiber and polypropylene fiber. The cigarette filter tip produced by acetate fiber has superior comprehensive performance and is mainly used for medium and high-end cigarettes. However, it uses high-quality wood as raw material, and the production process is complicated and accompanied by comparative many pollution problems

my country's forest resources are limited, and acetate fiber cannot be self-sufficient, so it needs to be imported in large quantities every year. However, with the increasing deforestation and people's increasing awareness of environmental protection, many countries have restricted deforestation, resulting in increasingly tight supply of acetate fiber worldwide. It remains high, which determines that cellulose acetate fiber cannot be used in large quantities in middle and low-grade cigarettes. In addition, cellulose acetate itself can be degraded, but after esterification, the biodegradation performance declines, and it usually takes 15 years to biodegrade completely. , is no longer a degradable material in the strict sense; polypropylene fiber has abundant sources, simple production process, and low price, but due to its own structural characteristics, the appearance, hardness, barrier and adsorption of the filter produced by it are poor. Can be used for middle and low grade cigarettes

[0003] In recent years, biodegradable polymer materials such as polylactic acid, polyhydroxyalkanoate and polybutylene succinate have developed rapidly, especially polylactic acid; Biodegradation occurs, and finally produces carbon dioxide and water without leaving any pollutants. It is a veritable green and environmentally friendly material; polylactic acid is rich in sources, and its raw materials come from natural starches such as corn and sweet potatoes. Its resources can be regenerated, and polylactic acid has good Processing performance, can be processed by various processing methods of general thermoplastics, including melt spinning, in addition, polylactic acid can filter certain harmful substances in smoke, and has the ability to replace acetate fiber and polypropylene fiber as a new type of smoke Good conditions for using filter tow; but the filter tow made of unmodified polylactic acid material has the following problems: the temperature resistance and shaping ability are limited, after the prepared filter is installed on the cigarette, when the cigarette is drawn to the filter tip , the filter tip will instantly shrink its head due to the high smoke temperature, leaking smoke, and reducing the adsorption of the filter tip; in addition, the current cigarette filter tip tow is generally prepared by traditional methods, and there are the following problems: one is that the filter tip tow absorbs moisture The performance is average, and the moisture return rate is 0.4%~0.6%, which seriously affects the adsorption and affinity of the filter, so that the content of alkoxy radicals, alkyl radicals, carbon monoxide, tar and heavy metals contained in the smoke cannot meet the "Tobacco Control Framework According to the new index of the Convention, after the current tow is made into a filter and installed on a cigarette, the general tar content is 15mg, the nicotine content is 1.5mg, the alkoxy radical and alkyl radical content are 14mg, and the carbon monoxide content is 14mg; Second, in the process of preparing filter tow, when crimping in the crimping machine, due to the high-speed rotation of the crimping wheel, high heat will be generated at the friction between the tow and the surface of the crimping wheel and the surface of the curling knife edge, resulting in nodules in the tow Stiffness, the hardness of the filter tip made after opening and gluing by the filter rod forming machine is ≥90%, and the circumference is ≥0.3mm, which becomes a substandard product