Polylactic acid cigarette tow, preparation method and application thereof

Abstract

The invention provides a polylactic acid cigarette tow. The polylactic acid cigarette tow comprises the following raw materials in parts by weight: 80-85 parts of polylactic acid resin, 1-2 parts of anucleating agent, 0.5-3 parts of a lubricant, 0.5-3 parts of an antioxidant, 4-8 parts of a foaming agent and 7-11 parts of a foaming assistant, wherein the polylactic acid resin is self-made, the melt index is 5-12 g / 10 min under the load of 190 DEG C / 2.16 KG, and the molecular weight distribution is 1.2-2.5. The polylactic acid cigarette tow prepared by adopting the method has the advantages that the density of the tow is 0.56-0.77 g / cm<3>, the breaking strength reaches 2.2 cN / dtex- 2.5cN / dtex, a filter tip rod made from the tow is small in suction resistance and good in air permeability, and the smoking comfort of a user can be greatly improved.

Description

technical field [0001] The invention relates to a cigarette tow, in particular to a polylactic acid cigarette tow, a preparation method and an application thereof. Background technique [0002] Tow for tobacco is an important material for producing cigarette filter rods, which can improve the taste of cigarettes and reduce the harm of harmful substances in smoke to human body. The traditional cigarette tow material is cellulose acetate, but a large amount of organic waste water will be generated in the process of pulping, esterification treatment and solution spinning of cellulose acetate tow, the production process is complicated, the energy consumption is high, and the pollution is large, which seriously restricts the Development of cellulose acetate tow. [0003] Polylactic acid fiber is a kind of polyester fiber made from lactic acid fermented from renewable corn, sugar beet, grain or potato starch as raw material, polymerized and spun. It not only has good biocompatib...

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Problems solved by technology

[0004] CN201310048812.9 provides a modified polylactic acid cigarette tow and filter rod and its preparation method, which mainly reduces the regularity of lactic acid molecules on the surface of polylactic acid tow by reducing the proportion of L-lactic acid units, and reduces the degree of crystallinity , so as to increase the swelling effect of the plasticizer on the surface of the tow to increase the hardness of the filter rod, and the hardness reaches 87%. However, the addition of a large amount of plasticizer will increase the suction resistance of the filter rod and affect the smoking comfort of the user.

[0005] CN201610596534.4 provides a heat-resistant polylactic acid cigarette tow and its preparation method, which adds a special inorganic crystallization nucleating agent to the polylactic acid resin to increase the crystallinity of the rolled tobacco bundle, thereby improving heat resistance, and a large amount of inorganic The addition of particles will increase the density of the tow and reduce the comfort of smoking. In addition, the addition of inorganic particles may agglomerate and lead to a decrease in breaking strength, and the tow is prone to breakage during the forming process

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