DE2841077A1 - METHOD FOR PRODUCING CIGARETTE FILTERS - Google Patents

Description

_84 lu77

PATENT LAWYERS

- DIPL.-ING. ALEX STENGER

D-4000 DÜSSELDORF 1 "^ * DIPL.-ING. WOLFRAM WATZKE

Malkastenstrasse 2 DIPL.-ING. HEINZ J. RING

Our reference: 19 478 Date: September 18, 1978

SOCIETE JOB ÄNCEENS ETABLISSEMENTS BARDOü-JOB & PAUHHAC, 13 rue Emile Zola, F-66004 Perpignan

Method of manufacturing cigarette filters

The invention relates to a method for producing cigarette filters from a fibrous web material, which is made of a mixture of synthetic fibers, such as cellulose acetate, and natural Cellulose fiber is made.

Fibrous filter materials are already known as web goods that after appropriate processing to heat cigarette filters with a certain proportion of heat-fusible fibers are used so that the cigarette filters have good strength properties after appropriate heat treatment of this material Smoke opposite with unrestricted inhalation ability at the same time of the smoker.

Other fibrous filter materials are also already in web form for the production of cigarette filters from several on top of each other layers are known, of which one is made of natural cellulose fibers such as cellulose wadding, and the other is made of cellulose acetate exist in order to create filters in an economical way whose properties are similar to those of the so-called multiple filters several butt juxtaposed elements of different Quality are equivalent.

These two types of fibrous filter materials have the following Disadvantage:

- they require the use of one or more high-temperature heating devices, around the entire filter mass to the melting temperature

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Telephone (0211) 36 05 U Telegram address: Dabspatent Postsdiedckonto Cologne 227610

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door to bring the heat-fusible fibers;

- There must be two webs of material of very different nature are produced, e.g. a web made of cellulose acetate and one made of cellulose wadding, which is expensive for each of these webs Requires pretreatments that are difficult and complicated to carry out.

The present invention eliminates these disadvantages, since it has as its subject a process which involves the manufacture of cigarette filters from fibrous filter material in sheet form made possible, which consists of a mixture of synthetic fibers and natural cellulose fibers, this method being characterized is through the use of plasticizable synthetic fibers and the order of a special plasticizer made from one containing such fibers Material on this web which, after deformation of the web material into a cylindrical strand, forms a network of inter-fiber connections in the synthetic fiber layer of the material web, which creates a second network of synthetic fiber connections between the contact zones of the filter web material converted into a filter rod is superimposed.

According to one embodiment, a part of the synthetic fibers consists of Cellulose acetate fibers, the plasticizer in this case being formed from glycerol triacetate.

The fibrous web can be made in the way of normal papermaking processes or using the well-known fleece technique. It can be creped or uncreped, in the former case the creping can be done inside or outside the paper machine.

The cellulose acetate fibers contained in the mixture of the fiber material web can be cut into short lengths, for example from 5 to 25 mm, from endless crimped cellulose acetate threads from roving or rope, as are normally used for the production of acetate-zig-zag

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rescue filters are used.

In a preferred embodiment, the acetate fibers are 25 dry weight. -% contained in the total fiber mixture of the web material, with the remainder of 75 % consisting of natural cellulose fibers.

This fiber web material is available in rolls. Its inventive Forming before processing into cigarette filters requires the following operations:

- unwinding from the spool;

- Moistening the web material with water, if this is dependent on is required by the product quality to be manufactured;

- Embossing fine longitudinal grooves or creping in the longitudinal direction;

- possible drying;

- Application of a special plasticizer made from fiber-containing! Material by any method known in the art of acetate filter manufacture, for example by spraying. This plasticizer contains the same synthetic fibers as are contained in the web material itself. With regard to the cellulose acetate fibers, the plasticizer can consist of glycerol triacetate, but with regard to the total weight of the filter to be stiffened, its proportion must be below 20 % .

The fiber web impregnated with plasticizer in this way becomes geometric or otherwise deformed into a cylindrical filter rod, the plasticization after application of the plasticizer to the Web material begins and continues beyond the deformation of the same, which on the one hand results in a network of inter-fiber connections in the synthetic fiber layer of the web and on the other hand to a network of inter-fiber connections between the contacting ones Surfaces, zones or locations of the path deformed to form the strand leads.

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The present invention provides in terms of cigarette filters produced the following advantages:

- good compactness and elasticity before and during smoking due to the presence of the two inter-fiber networks, which because of their stiffness and insensitivity are the moisture of tobacco smoke and against that contained therein Saliva of the smoker effectively contribute to strengthening the structure of the filter;

- good separation and retention of tar and nicotine from tobacco smoke because of the high proportion of natural cellulose fibers;

- selective separation and retention of certain toxic substances from tobacco smoke such as phenols due to the presence of a plasticizer selected for this purpose, for example of glycerol triacetate;

- Improvement of the organoleptic properties of the smoking tobacco after passing through the filter, especially in the case of light so-called Flue cured tobacco because the web material contains cellulose acetate.

The filter according to the invention thus combines the advantages of one conventional cigarette filters made of paper and those of a filter made of acetate, at the same time each of these filter designs own disadvantages are reduced.

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Claims (4)

284 1U77 "ATENTANWÄLTE DIPL.-ING. ALEX STENGER D-4000 DÜSSELDORF 1 DIPL.-ING. WOLFRAM WATZKE Malkastenstrasse 2 DIPL.-ING. HEINZ J. RING Our reference: 19 478 Date: September 18, 1978 SOCIETE JOB ANGEMENTS ETABLENTS -JOB & PAUILHAC, rue Emile Zola, F-66OO4 Perpignan Process for the production of cigarette filters Claims: 1. Method of making cigarette filters from a fibrous one Web material that is used to achieve contact between different zones of the fiber web to form a cylindrical strand is deformed, marked by the use of a fibrous web material, which is made of a mixture of plasticizable synthetic fibers and natural Cellulose fibers are made up of a special plasticizer from material containing such synthetic fibers onto this web material and by deforming this plasticized web material into a strand before the end of the plasticizing process to create a network of inter-fiber connections in the synthetic fiber layer form which a second network of inter-fiber links is superimposed between the contact zones of the Bahran material converted into a filter rod. 2. The method according to claim 1, characterized by using Synthetic fibers in the form of cellulose diacetate fibers. 3. The method according to claim 1, characterized in that the dimensions the synthetic fibers roughly correspond to the dimensions of the natural cellulose fibers. 4. The method according to claim 1, characterized in that the pro- - 2 - 909827/0606 Telephone (0211) 36 0514 Telegram address: Dabspatent Foslsdieddionto Cologne 227610 ? percentage terms Bahnrnaterials content of the synthetic fibers of about 20 to j 0, ι of the dry weight of the constituting yasergsmisches, while the remaining 70 3o Ms'/> from natural; Cellulose fiber ^ consist. Method according to claim 2, characterized in that the verification ma rather consists of n-lycerol triacetate. _{3T / hl} 909S27 / 0606