BG64611B1 - Filter cigarette with biodegradable cigarette filter - Google Patents

Abstract

The invention relates to a filter cigarette comprising a biodegradable filter and tobacco strand surrounded by cigarette paper, a non-woven air-laid cellulose filter with a normal retention capacity and a filter ventilation area extending in a peripheral direction. The inventive filter cigarette has the following combination of features: the filter has a condesate retention capacity of 40-60 %; the non-woven cellulose is non-crimped, the nicotine/tobacco strand condesate yield ratio lies between 0.6 and 0.9 (nicotine *10/condensate), the apparent density of the tobacco mixture of the tobacco strand ranges from 200 to 250mg/ml, the tobacco strand drag is between 45 and 65 mm WS when measured in an enclosed form, air permeability of the cigarette paper is 20-50 Coresta units and the filter ventilation is 15-50 %.

Description

(54) FILTER CIGARES WITH BIOLOGICALLY DESTROYING FILTER

Technical field

The invention relates to a filter cigarette with a biodegradable filter according to claim 1.

BACKGROUND OF THE INVENTION

This type of filter cigarette has been described many times in the past. But the disadvantage of all the biodegradable filter cigarettes described so far is the apparent influence on the smoking taste exerted by the materials described and which has always caused smokers to quit a cigarette made from a material other than cellulose acetate. Another disadvantage of filters made from biodegradable cellulose is the apparent different appearance of the filter end. Therefore, in the past, biodegradable filters such as monofilters could not be applied to the acetate filter market.

SUMMARY OF THE INVENTION

It is an object of the invention to make a filter cigarette of a given type which preserves the advantages of a known filter cigarette and at the same time creates the impression of a "typical acetate taste" and a typical acetate appearance.

According to the invention, this object is solved by the features given in the characterizing part of claim 1.

Suitable forms of implementation are defined by the features of the subordinate claims.

The advantages achieved by the invention are based on the selection of a special cellulosic material and the development of a suitable filter cigarette structure by adjusting the essential parameters, namely the holding capacity, the ratio of nicotine to condensation in the tobacco rod yield, the fill density of the mixture density the tobacco bar, the breathability of cigarette paper and, ultimately, the degree of filter ventilation, in the sense of a common construction, which, on the one hand, optimizes the impression of taste and, on the other, the visual sensation. The filter cigarette nicotine yield is maximum 1 mg and the condensation rate is 6 to 12 mg.

The stated objective of achieving a ventilation rate of the order of 15 to 50% can be achieved by the proper layout of the ventilation zone in the lining paper and the liner.

According to one preferred embodiment, the ventilation zone of the filter is formed by one or two rows of perforations at least 10 mm from the end of the mouthpiece; perforation can be done on the finished cigarette either by laser beams or mechanically, and should be as small and invisible as possible, with good results being achieved with 15 to 25 holes in two ventilation rows.

Surprisingly, the taste and visual sensation typical of acetate can only be achieved if the filter is made of cellulosic material. method of laying air in a woven fibrous mass and the same, without being fastened, is finalized in a finished filter. In this case, according to the desired suction resistance of the filter, a suitable combination of unit weight, thickness and width of the fibrous mass obtained by the air application method can be used.

In the air-laying method, as exemplified in US-PS 4,375,447, the prepared cellulose fibers are not suspended in water as in the conventional paper production method and are not placed on a permeable sieve to form a sheet, whereby the cellulose The milling and fibrillation fibers are mechanically interwoven with each other, and fed as far as possible individually in an air stream that passes them through a permeable infinite sieve and scatters them indiscriminately. In this way, a voluminous, almost cotton-like fiber mass is obtained which is not yet mechanically resistant or the fibers are not woven together. Mechanical soldering in this way and the necessary resistance required for further processing is obtained by the addition of a binder - for example polyvinyl alcohol, polyvinyl acetate, polymer starch, dextrin or latex. The degree of density / g / cm '/ and hence the volume, respectively. thickness can be achieved by subsequent calendering. The weight per unit area / g / m ² / is adjusted by the speed of the sieve or the flow of fibers into the air stream.

Examples of carrying out the invention

The invention is explained in more detail by means of the following embodiments.

The filter cigarette is a tobacco-wrapped cigarette paper and a tobacco-related filter. The density of the tobacco mixture varies between 200 and 250 mg / ml. The suction resistance of the barrel, measured overall, is between 45 and 65 mm WS.

Cigarette paper has a low to medium air permeability of 15 to 50 Coresta units. The ratio of nicotine * 10 to condensation in the rod yield of the tobacco mixture should be between 0.6 and 0.9.

The filter consists of folded non-creased fibrous Air laid and is covered with porous wrapping paper. Around the wrapping paper there is a porous lined paper that serves to attach the filter to the tobacco bar. In this case, the air permeability of the porous area of the lining paper is selected such that, along with the wrapping paper below it, it provides the desired degree of ventilation in the filter.

Experiments with such a filter, in combination with the specified tobacco bar, yielded a condensation rate of 6 to 12 mg and a maximum of 1 mg of nicotine. Tests conducted with experienced smokers have shown that such cigarettes are no different from classic acetate filters.

Claims (6)

Claims 1. A filter cigarette with a biodegradable filter comprising a tobacco bar wrapped in cigarette paper, a filter produced by the air-laid cellulose fibrous mass method, with a normal holding capacity and a filter ventilation zone extending in the periphery, that the filter 5 has a condensate holding capacity of 40 to 60%, the non-woven cellulose is non-fixed, the ratio of nicotine to the tobacco-derived condensate is between 0.6 and 0.9 (nicotine * 10 / condensate), the filling density of the tobacco blend 10 in the tobacco bar varies from 200 to 250 mg / ml; the suction resistance of the tobacco rod is between 45 and 65 mm WS, the air permeability of the cigarette paper is from 20 to 50 Coresta units, and the filter ventilation rate is from 15 to 50%. 15 A filter cigarette according to claim 1, characterized in that the ventilation zone is formed by a combination of wrapping and lining paper starting at least 10 mm from the end of the filter at the side of the mouth. 20 Filter cigarette according to claim 1, characterized in that the ventilation area on the finished cigarette is made mechanically or by laser beams. Filter cigarette according to claim 2, 25, characterized in that the ventilation zone is formed by one or two rows of ventilation openings at least 10 mm apart from the end of the filter at the side of the mouth. A filter cigarette according to any one of claims 1 to 4, characterized in that the filter is made up of an uncured cellulose fibrous mass 0.5 to 1.5 mm thick. Filter cigarette according to one of Claims 1 to 5, characterized in that 35 The rub consists of an uncut cellulose fiber mass with a width of 15mm.