A kind of polylactic acid filter stick paper core and its manufacturing method

Abstract

The invention relates to a polylactic acid filter stick paper element and a manufacturing method thereof, in particular relates to a biodegradable polylactic acid filter stick paper element and a preparation method thereof, and belongs to the technical fields of tobacco tar filter elements and manufacturing methods. The polylactic acid filter stick paper element is prepared from the following raw materials in parts by weight by virtue of melt spinning: 100 parts of polylactic acid and 5-15 parts of a bonding agent, wherein a crystallization nucleating agent accounts for 0.15-0.5% of the mass percentage of polylactic acid; the ratio of a laevo isomer in the polylactic acid is 95-99%; the crystallization nucleating agent is a mixture of a substituted aryl lithium phosphate salt Na-03 and nano calcium carbonate, the substituted aryl lithium phosphate salt Na-03 accounts for 0.10-0.30% of the mass of the polylactic acid, and the nano calcium carbonate accounts for 0.05-0.2% of the mass of the polylactic acid. The materials used by the paper element are rich in resource, the manufacturing cost is low, the curling property index, tensile strength, filtration efficiency and quality characteristic of the filter stick paper element prepared by the method are close to those of cellulose acetate smoke filter material, and the polylactic acid filter stick paper element is biodegradable.

Description

technical field [0001] The invention relates to a polylactic acid filter rod paper core and a manufacturing method thereof, in particular to a biodegradable polylactic acid filter rod paper core and a preparation method thereof. The invention belongs to the technical field of smoke oil filter elements and manufacturing methods. Background technique [0002] Filter tip is an important part of cigarettes, it can absorb and filter harmful components in smoke, improve the taste of smoke, reduce oral irritation and harm to human health. At present, there are mainly two kinds of cigarette filter materials on the market: diacetate cellulose tow (acetate fiber) and polypropylene tow (acrylic fiber). Acetate fiber filter material has a history of more than 30 years, with excellent filtration and adsorption performance, and the market share is about 90%. But acetate fiber filter also has some disadvantages, as its production raw material is perennial high-quality wood, my country is...

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Problems solved by technology

[0008] As another example, Jing Xiabin and others from Changchun Institute of Applied Chemistry, Chinese Academy of Sciences reported that polylactic acid resin raw materials were spun into polylactic acid tow for cigarettes and polylactic acid tow for cigarettes was prepared by opening, bonding, wrapping, cutting and post-treatment. The technological process and method of polylactic acid cigarette filter rod; the Chinese patent application number: 201010127357.8 discloses "a kind of degradable cigarette tow and its preparation method and the preparation method of filter rod", the Chinese patent application number is: 201010229540.9 Disclosed "a preparation method of polylactic acid fiber tobacco tow", but the above-mentioned patents have some problems and deficiencies: (1) The curl index of polylactic acid tow is low, resulting in low rod yield and poor practical application effect; ( 2) The plasticizers used are odorous, volatile, and some are toxic, which cannot meet the requirements for forming polylactic acid tow filter rods for cigarettes, and affect the sensory quality of cigarettes. The hardness of the filter rods decreases with the prolongation of storage time, and it is difficult to connect cigarettes (3) There is a lack of detailed research on the influence of various parameters of polylactic acid tow for cigarettes on the filter rod forming, and it is difficult to ensure stable filter rod quality; (4) The curing time of the filter rod is too long (24h-48h), which cannot meet the needs of cigarette production Process requirements for the connection of each process