Biodegradable cigarette fiber material and cigarette filter

Abstract

The invention provides a biodegradable cigarette fiber material and a cigarette filter. The biodegradable cigarette fiber material comprises the following raw materials of 90-100 percent of polylactic acid modified by a non-lactone monomer through copolymerization and 0-10 percent of stabilizing agent as well as the balance of high polymer of the polylactic acid chain segments, wherein the polylactic acid modified by the non-lactone monomer through copolymerization is a non-lactone monomer chain segment in a molecular chain containing 1-30 percent of the total quantity of the chain segments, the weight-average molecular weight of the high polymer is 0.5-3.5 millions and the dispersion index of the high polymer is 1.2-3.0. The biodegradable cigarette fiber material is prepared from the raw materials through using a melting spinning process. The invention also provides a biodegradable cigarette filter rod prepared from the cigarette fibre material through sizing processing, and a cigarette product. The processing and using properties of the raw materials are remarkably improved. The provided cigarette filter has a property equivalent to the property of the traditional general cigarette filter, a cigarette end discarded by a smoker can be decomposed within shorter time in the natural environment, and the pollution of the cigarette waste to the environment is avoided at present while the requirement of cigarette production is met.

Description

technical field [0001] The invention relates to a fiber material for cigarettes and a cigarette filter made of the fiber material. The fiber material for cigarettes and the cigarette filter are based on polylactic acid (PLA) polymer modified by copolymerization of non-lactone monomers. Material resin with excellent biodegradability. Background technique [0002] Cigarette filters have the functions of filtering, blocking and absorbing harmful components such as nicotine and tar in smoke. In addition to the above functions, good filter materials should also be able to improve the taste of smoke, reduce the stimulation of smoke on the oral cavity and the human body. Health damage. As a relatively mature technology, the materials currently used to manufacture cigarette filters are generally made of cellulose acetate fiber and polypropylene fiber. Considering the processing performance and the comprehensive performance of the final filter tip, cellulose acetate fiber is the fir...

AI Technical Summary

Problems solved by technology

Although this prior published patent application teaches that lactic acid polymers can be used in the processing of cigarette filters, and compared with commercialized cellulose acetate filter rods and polypropylene filter rods, the polylactic acid cigarette filter rods not only have The advantages of complete biodegradability and low production cost, and the filter rod made show good results in terms of filtration performance and physical and mechanical properties, but it can be seen from the contents of the description that the main resin used in this technical solution It is a mixture of one or more specifications of polylactic acid, or a copolymer of lactide and caprolactone, lactide, or lactide and caprolactone and glycolide, these resins are made of lactone Polymerization, the prepared polymer is a random polymer, this material is brittle and easy to hydrolyze, the water content of the material is required to be less than 0.5 / 10,000 during processing, and this material has poor heat resistance and thermal deformation The temperature is very low (less than 60°C)

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