Hollow polylactic acid fiber for cigarette cooling filter section and preparation method of hollow polylactic acid fiber

Abstract

The invention discloses a hollow polylactic acid fiber for a cigarette cooling filter section and a preparation method of the hollow polylactic acid fiber. The method comprises the follow steps: withfood fiber-grade polylactic acid as a raw material, drying, melting, spinning, cooling, oiling, drafting, crimping, drying and shaping are performed, and the fiber is prepared. In the smoking processof a cigarette with a filter tip prepared from the hollow polylactic acid fiber, the hollow polylactic acid fiber has high adsorption and absorption capability to polar and non-polar smoke component gases; smoke is heated after passing through the filter tip, the polylactic acid material absorbs heat during phase transition, and the prepared hollow fiber has large diameter and large smoke passage,the contact exchange specific surface of the cigarette filter tip and the smoke is increased, the smoke temperature is reduced, and the harm reduction effect is achieved.

Description

technical field [0001] The invention relates to the technical field of cigarette filter materials, in particular to a hollow polylactic acid fiber used in a cigarette cooling filter section and a preparation method thereof. Background technique [0002] When traditional cigarettes are burned, the temperature of the combustion cone can reach above 800°C. Cigarette smoke passes through the heat exchange and loss of the tobacco rod and filter rod, and when it is finally inhaled into the mouth of the consumer, the high temperature of the smoke will cause smoke stimulation and burning sensation. Reduce the comfort of cigarette smoking. This not only easily makes the feeling before and after smoking inconsistent, but also often feels uncomfortable symptoms such as hot prickles in the mouth. In addition, a variety of harmful substances produced by high-temperature combustion are more likely to enter the mouth with aerosols under higher temperature conditions, and have a greater im...

AI Technical Summary

Problems solved by technology

In addition, a variety of harmful substances produced by high-temperature combustion are more likely to enter the mouth with aerosols under higher temperature conditions, and have a greater impact on human health

[0003] Cigarette filters are divided into ordinary cigarette filters and heat-not-burn cigarette filters. At present, most of the cigarette filter tows commonly used in China are polylactic acid (PLA) tows, including traditional PLA tow filter rod segments, PLA sheets and other Materials composite tow and other structural forms, the preparation technology mostly adopts triacetin bonding and water-based glue bonding. The route technology of triacetin bonding is complicated, and there are still problems of poor quality Fatal technical defects such as stability, filter rod shrinkage, and collapse are difficult to solve in a short time; the water-based adhesive bonding route technology is mature, spinning stability, and filter rod forming stability are good. It is currently the preferred preparation method for polylactic acid tow , but the prepared ordinary polylactic acid tow is used in cigarette filters, there are still technical defects of high smoke temperature and lack of cooling effect

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