Pure polylactic acid tows as well as preparation method and cigarette filter trip thereof

Abstract

The invention relates to pure polylactic acid tows and a cigarette filter trip of the pure polylactic acid tows. The pure polylactic acid tows are made of a spinning raw material formed by blending L-polylactic acid and D-polylactic acid (dextrorotation polylactic acid), wherein the L-polylactic acid accounts for 90-98% of the total weight, and the D-polylactic acid accounts for 2-8% of the total weight. The pure polylactic acid tows are spun by a conventional two-step process cigarette polypropylene staple melt spinning technology. The pure polylactic acid tows can be used for producing the cigarette filter trips with different hardness and have the advantages of being capable of effectively inhibiting molds and harmful bacteria in tobacco shreds and on the surfaces of cigarette holders, having compete biodegradability within three months and obvious mechanical affinity on carbonyl compounds in smoke gas and being capable of effectively intercepting harmful matters such as formaldehyde, acrolein and crotonaldehyde in smoke gas; and the interception efficiency of the pure polylactic acid tows is improved by more than 20% in comparison with the interception efficiency of a cellulose acetate filter trip.

Description

technical field [0001] The invention relates to a cigarette material, in particular to a high molecular pure polylactic acid fiber tow for smoking and a cigarette filter tip rolled with it without adding plasticizer. Background technique [0002] Cigarette filters are mainly made of cellulose diacetate tow, and triacetin needs to be sprayed in the tow to roll the diacetate cellulose filter, and the amount of spraying accounts for 6%-10% of the tow, so as to ensure The hardness of the filter. After the filter tip is rolled out, there is a 24-hour curing period. [0003] Cellulose diacetate tow is made from natural wood pulp, which is acetylated to obtain diacetate sheets, then dissolved into a solution with acetone, and spun by solution spinning. The preparation and spinning process of diacetic acid is polluting and consumes a lot of energy. Acetone remains in the diacetate fiber. Therefore, the use of diacetate fiber to roll the filter not only consumes a large amount of...

AI Technical Summary

Problems solved by technology

The preparation and spinning process of diacetic acid is very polluting and consumes a lot of energy

Therefore, the use of diacetate fiber to roll the filter not only consumes a large amount of forest resources, but also buries potential harmful substances in the filter.

[0004] Diacetate fiber is not easy to degrade, littered cigarette butts will affect the environment and pollute the soil

Diacetate fiber is flammable, littering cigarette butts can easily cause fire

Not to mention whether each formula has plasticizing and bonding effects (there is no successful report yet)

It works, but adding so many compounds to the filter will undoubtedly bury potentially harmful substances in the filter.