KR20010032330A - Biodegradable cigarette filter - Google Patents

Abstract

The present invention relates to biodegradation, comprising tobacco strands surrounded by tobacco paper, filters having ″ normal ″ levels of retention made from cellulose fleece made using the ″ air-laid ″ process, and filter vents running circumferentially. It relates to a filter cigarette having a sex filter. It has the following characteristics: the condensate retention level of the filter is 40 to 60%; Cellulose fleece is ″ un crimped ″; Nicotine / condensate strand yield ratio of tobacco strands is 0.6 to 0.9 (nicotine * 10 / condensate); Tobacco blend packing density of tobacco strand is 200-250 mg / ml; Tobacco-strand resistance is 45-65 mm male column pressure gauge, measured in closed condition; The air permeability of tobacco is between 20 and 50 Coresta units; Filter ventilation is up to 15-50%.

Description

Biodegradable Filter Cigarettes {BIODEGRADABLE CIGARETTE FILTER}

Such filter cigarettes have been described several times in the past. However, the disadvantage of all previously described filter cigarettes with biodegradable filters is the apparent effect on the taste of the smoke, which is caused by the different materials described which are always rejected by smokers as cigarettes made from materials other than conventional cellulose acetate. do. A further disadvantage, in particular the disadvantage of filters made from biodegradable cellulose, is also a clearly distinguishable difference in the appearance of the filter ends. In the past, this meant that biodegradable filters could not be accepted as monofilters for the acetate filter market.

The present invention relates to a biodegradable filter according to the introduction of claim 1.

It is an object of the present invention to produce a filter cigarette of the kind mentioned which retains the advantages of known filter cigarettes while providing ″ acetate-typical ″ taste sensation and ″ acetate-typical ″ visual appearance.

According to the invention, this object is achieved by the embodiments presented in the characterizing part of the claims.

Suitable forms are defined by the aspects of the dependent claims.

The advantages achieved with the present invention are the selection and essential factors of the particular cellulosic material, namely the retention properties of the filter, the nicotine / condensate strand yield of the tobacco strand, the packing density of the tobacco mixture of the tobacco strand, the air permeability of the tobacco paper and finally On the one hand it is in the design of the filter tobacco structure that matches the special cellulosic material by adopting the filter breathability in the direction of the overall structure to optimize the taste sense and on the other hand the visual appeal. The maximum yield of nicotine in filter tobacco is 1 mg and the condensate yield is 6 mg to 12 mg.

Post-search air permeability of 15-50% can be established by the corresponding design of the wrapper and the airbag during wrapping.

According to a preferred embodiment, the vent of the filter consists of one or two rows of holes at least 10 mm away from the mouth-side end; This hole can be laser irradiated or mechanically fabricated on the cigarette of the final stage, should be as small as possible and not large enough to be visible, and good results are obtained with 15 to 25 holes in two rows of vents.

Surprisingly, the taste taste of acetate-typical and the visual appeal of acetate-typical are made from cellulosic material in which the filter is processed into tangle fleece by the so-called ″ air-laid ″ process, which is further ″ non-crimp ″ processed to the final filter. It has been found that it can only be obtained if In this process, a suitable combination of area weight, thickness and width of the air-laid fleece can be established depending on the desired filter pullout resistance and thus retention.

For example, in the air-laid process as described in US Pat. No. 4,375,447, the prepared cellulose fibers are passed through a permeable sieve for sheet formation, without suspending in water as in standard paper making processes. The fibers are refined by beating and fibrosis and mechanically cross-linked with each other, but they are separated and passed through to a maximum in a stream of air that carries them onto a permeable continuous body and randomly stacked. This yields a voluminous fleece that is nearly cotton-like and therefore no mechanical strength or fiber bonds are demonstrated. The necessary mechanical strength required for mechanical bonding and further processing is obtained by adding a binder such as, for example, polyvinyl alcohol, polyvinyl acetate, polymer starch, dextrin or latex into the air stream. The degree of density (g / cm 3), and thus the volume or thickness, is determined by subsequent calendering. Area weight (g / m 2) is adjusted by the speed of the sieve or by introducing the fibers into the air stream.

The invention is explained in more detail with reference to the following aspects:

Filter tobacco has a tobacco strand wrapped with tobacco paper and a filter connected to the tobacco strand. The packing density of the tobacco blend is 200 to 250 mg / ml. The pullout resistance of the strand is a 45 to 65 mm male column pressure gauge as measured in the closed state.

Tobacco paper has a low or moderate air permeability ranging from 15 to 50 Coresta units. The nicotine * 10 / condensate strand yield ratio of the tobacco blend is between 0.6 and 0.9.

The filter consists of a ″ non-crimp ″ air-laid fleece that is folded together and wrapped in a porous wrapping paper. Zone-porous cover paper surrounds the wrapping paper and allows the filter to seat on the tobacco strand. The air permeability of the porous area of the cover paper is selected in relation to the wrapping paper with the desired degree of filter breathability.

Testing of such filters with the specified tobacco strands resulted in a condensate yield of 6-12 mg and a nicotine yield of at most 1 mg. Tests of smokers who have experienced long experiences have found that such cigarettes are indistinguishable from cigarettes typically made with acetate filters.

The present invention provides a filter cigarette of the kind mentioned which retains the advantages of known filter cigarettes while providing ″ acetate-typical ″ taste sensation and ″ acetate-typical ″ visual appearance.

Claims (6)

a) tobacco strands surrounded by tobacco paper; b) a filter made from cellulose fleece prepared using a ″ air-laid ″ process with a retention of ″ normal ″; And c) a filter cigarette comprising a filter vent, running in the circumferential direction, d) condensate retention of the filter is 40 to 60%; e) cellulose fleece is ″ un crimped ″; f) the nicotine / condensate strand yield ratio of tobacco strands is from 0.6 to 0.9 (nicotine * 10 / condensate); g) the packing density of the tobacco blend of tobacco strands is 200-250 mg / ml; h) a tobacco strand pullout resistance is a 45-65 mm male column pressure gauge, measured in a closed condition; i) the air permeability of tobacco paper is between 20 and 50 Coresta units; j) A filter cigarette with a biodegradable filter, characterized in that the filter air permeability is 15 to 50%. The filter cigarette of claim 1, wherein the vent is formed with a porous wrapping and cover paper at least 10 mm away from the mouth-side of the filter. The filter cigarette of claim 1, wherein in the cigarette of the final stage the vent is made mechanically or by laser irradiation. 3. A filter cigarette according to claim 2, wherein the vent is formed by one or two rows of vent holes 10 mm or more away from the mouth-side end of the filter. 5. The filter cigarette according to claim 1, wherein the filter consists of a ″ non-crimp ″ cellulose fleece of 0.5 to 1.5 mm thickness. 6. 6. A filter cigarette according to any one of claims 1 to 5, wherein the filter consists of a ″ non-crimp ″ cellulose fleece 10 to 15 cm wide.