JP2012026075A - Method for producing wrapping paper for self-extinguishing cigarette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a wrapping paper that meets requirements of a self-extinguishing cigarette by using constituent materials which do not exert an unpleasant influence on a taste and do reduce a possibility of ignition of a combustible material which may be contained such that it contacts tobacco.SOLUTION: There is provided a method for producing wrapping paper for self-extinguishing cigarette in which self-extinguishing characteristics is attained by coating a composition containing acacia gum and aluminum hydroxide as a fireproofing additive overall or partially on wrapping paper for cigarette by a printing technology and reducing air permeability of paper. The composition deposited on wrapping paper for cigarette is coated by using a printing technology, in which the concentration of acacia gum is made 0.15 wt.% to 60 wt.%, the concentration of aluminum hydroxide is made 0.25 wt.% to 50 wt.%, and the remainder is made water. The coating amount is controlled to be within a range of 0.5 g/mto 10 g/mbased on the weight.

Description

  The present invention relates to a method for producing a wrapping paper for self-extinguishing cigarettes.

  In particular, the method of the invention comprises a solution made from gum arabic or acacia gum using printing techniques by means such that the cigarette paper is provided with a coating on its inner surface or the surface in contact with the tobacco. A coating or a combination of fillers in the solution is applied to all or a portion of the paper so that the air permeability of the paper is changed to achieve self-extinguishing properties.

  Fields of application of the present invention include the industrial sector directed to the manufacture of cigarettes for smoking products, especially cigarettes.

  Numerous documents and methods relating to the production of self-extinguishing cigarettes are known in the state of the art. This feature for cigarettes is obtained by applying a certain type of coating to the cigarette paper in order to change the air permeability of the paper, and the type of coating applied and its viscosity depends on the result obtained. Play an important role.

In order to achieve the above-mentioned goals, two methods of treating cigarette paper are known and are described below.
1) In the first method, a coating is uniformly applied on the entire surface of the cigarette paper so that the entire wrapping paper has a reduced tendency to burn.
2) The second method is that a portion of the surface of the cigarette wrapping is formed so as to alternately form only certain predetermined areas, i.e., areas having normal combustion tendency and areas having reduced combustion capacity. Apply the coating to

  In each of the above-described processing methods for obtaining a wrapping paper adapted to a self-extinguishing cigarette, various methods have been investigated to obtain the proposed goal.

  The first method associated with a uniformly coated cigarette paper, i.e., the first method having a low ignition tendency for the entire area, has the disadvantage that the air permeability of the paper is low. High content of toxic substances during smoking. In addition, other disadvantages of this method are that the cigarette produced by the cigarette is incompletely burned, for example, black ash is generated, and the cigarette circular body is generally uneven and more desirable than desired. thick.

  For the second method, its main purpose is to reduce the air permeability of the wrapping paper only in the predetermined area so as to significantly reduce the combustion in the predetermined area. This effect can be achieved in various ways, for example by applying strong calendering, by applying specially treated cellulose fibers or cellulose fibers having a substance that is melted at high temperature, thereby making certain hydrogen soluble or fat soluble. It can be achieved by using a dissolvable polymer or the like.

  Accordingly, the object of the present invention is to provide self-extinguishing by using a construction material that does not have an unpleasant effect on its taste and in addition reduces the possibility of ignition of flammable materials that may be included in contact with tobacco. An object of the present invention is to provide a method for producing a wrapping paper that obtains a wrapping paper that meets the conditions of the cigarette.

  The purpose of this is to use a printing technique to print a continuous “ink” consisting of a solution obtained from gum arabic or acacia gum dissolved in water with or without additives on the inner surface of the wrapping paper. This is achieved by the process for producing a cigarette paper for cigarettes according to the present invention which is produced by an appropriate coating which is applied to the area or only to the area.

  On the other hand, fire additives added to the composition of the solution have been found to help reduce the air permeability of the paper without excessively affecting the viscosity of the solution, and the most preferred fire additive is hydroxylated. A fire additive that can be selected from the group consisting of aluminum, calcium sulfate or magnesium hydroxide.

  According to the present invention, a method for producing a self-extinguishing cigarette paper comprises a plurality of steps as described below.

  The first step of the method consists in producing a composition that is used as a coating that is applied in whole or in part on the side of the wrapper that contacts the tobacco. The composition comprises a predetermined amount of gum arabic in a concentration of 0.15% to 60% by weight, preferably 0.5% to 55% by weight, more preferably 0.65% to 50% by weight. Alternatively, it can be obtained by dissolving acacia gum in water. In practice, the preferred concentration of gum arabic or acacia gum in the composition is about 15% to 30% by weight.

  When the composition includes a fire prevention additive, the additive is added in a special amount depending on its nature in the second step of the process of the invention. Therefore, a suitable amount of additive is about 10% by weight aluminum hydroxide, consisting of water until the balance of 100% is achieved.

  However, there are other products that can be beneficially combined with gum arabic or gum acacia without excessively affecting its viscosity. This has an increase in the self-extinguishing properties of cigarettes because of their ability to reduce fire and paper air permeability properties. In particular, these suitable products are from magnesium hydroxide or calcium sulfate in a concentration of 0.25 wt% to 50 wt%, preferably 2 wt% to 40 wt%, most preferably 3 wt% to 35 wt%. Can be configured.

  Once the desired composition or “ink” that can be applied to the cigarette paper is produced, the composition or “ink” is uniform over only a portion of the area on the inner surface of the web or across its entire surface. To be applied.

In accordance with the present invention, a composition that can be used as an “ink” can be flexographically printed continuously or in strips using a transfer roller configured to correctly transfer the “ink” to a cigarette paper. Although preferably deposited on a web, it can be deposited on a cigarette paper by techniques such as silk screen printing, flexographic printing, photographic relief printing or offset printing. According to the present invention, this “ink” is 0.5 g / m ^{2 to} 10 g / m ² , preferably 1.5 g / m ^{2 to} 9 g / m ² , more preferably 2 g / m ^{2 to} 7 g / m ² . It can be deposited on the wrapper at a concentration.

  Determine the characteristics of the self-extinguishing roll obtained by applying the techniques described above, such as the inherent properties of the base material of the roll used, the nature of the material applied to the roll and the actual amount deposited There are special factors that have an impact.

  A very important parameter to be considered when printing a web by the method of the present invention is the viscosity of the ink. In photographic relief printing and flexographic printing, there is a viscosity limit that prevents the transfer of ink to the contact screen. In addition, high ink viscosity results in loss of definition and low stretch. Therefore, in addition to its effect on reducing the air permeability of paper, its tendency to ignite and the taste of cigarettes, the corresponding limit of viscosity must be taken into account when selecting a binder. Since there is a direct relationship between the solids content of the solution and its viscosity, the viscosity limit is interpreted as the limit for the solids in the ink, i.e., the amount of material applied to the paper.

  A suitable material for the present invention is gum arabic or gum acacia, but materials selected from the group consisting of starch, girl gum, sodium alginate, hydroxypropylmethylcellulose, methylcellulose and sodium carboxymethylcellulose can also be used.

  For comparison, nitrocellulose was evaluated by triacetin as a plasticizer combined with calcined kaolin.

  Ink applicators include the use of rods that apply ink at different concentrations. These rods apply ink to the wire side of the wrapping paper, i.e., the surface of the paper that contacts the wire of the papermaking machine during wrapping paper manufacture. That surface is the surface that contacts the cigarette when the cigarette is manufactured.

  A table showing the results of applying the inks described above on the wrapping paper by measuring the air permeability of the paper before and after applying the ink is shown below. The free burning of cigarettes made of common tobacco and the burning of those cigarettes in contact with 10 laboratory wraps (ashless filter paper, La Paperella de Beso, 438, 15 cm diameter) Measured. The results are as follows.

table
Product Concentration Applied Initial Final Roll Wrapping Paper
% Liquid g / m ² Transmittance Transmittance Tobacco on
CU CU free winding
Burning cigarette
combustion
Reference 1: Nitro 10 7 33 11 Yes Yes Cellulose + +
Firing kaolin 30
(Ansilex, Engel
heart)
Reference 2: 32 7 32 3 Yes Yes Nitro
cellulose
Starch 4 11 35 28 Yes Yes (Perhector Mill P255
Avebe
Girl rubber 2 11 32 22 Yes Yes (Maypro film 100,
Mayhall)
Starch + 3.5 11 35 27 Yes Yes Alginic acid +0.5
Sodium (Perhectamil P255
Avebe +
Sashialgin S60, SKW
Biosystem)
Hydroxypro 1 11 32 14 Yes Yes Pyrmethylcellulose (Mesofus 65HPM450,
ICI
Hydroxypro 2 11 33 9 Yes Yes Pyrmethylcellulose (Mesofus 65HPM450,
ICI
2 11 32 14 Yes Yes Sodium carboxymethylcellulose (Finfix 1500, Novi
Ant)
6 7 31 0 Yes No Carboxymethylcellulose sodium (Warocell MW
50,
Forf Walsrode)
Very high viscosity
10 11 35 22 Yes Yes Sodium carboxymethylcellulose (Branose 7ULC,
Hercules)
Very high viscosity
15 11 35 8 No No Carboxymethylcellulose sodium (Branose 7ULC,
Hercules)
Very high viscosity
7.5 11 34 14 Yes Yes Carboxymethyl +7.5
Sodium cellulose (Branose 7ULC,
Hercules) +
Aluminum hydroxide (Marty fin OL107,
Martinswerk)
High viscosity
10 11 35 6 Yes No Carboxymethyl 10
Sodium cellulose (Branose 7ULC,
Hercules) +
Aluminum hydroxide (Marty fin OL107,
Martinswerk)
High viscosity
15 11 32 4 Yes No Carboxymethyl +10
Sodium cellulose (Branose 7ULC,
Hercules) +
Aluminum hydroxide (Marty fin OL107,
Martinswerk)
High viscosity
10 11 35 11 Yes No Carboxymethyl +10
Sodium cellulose (Branose 7ULC,
Hercules) +
Magnesium hydroxide
High viscosity
10 11 54 14 Yes Yes Carboxymethyl +10
Sodium cellulose (Branose 7ULC,
Hercules) +
Magnesium hydroxide
High viscosity
Methylcellulose 2 11 37 11 Yes Yes (Methocel A15,
FG, Dow Kemi
Cull Company
Methylcellulose 3.7 11 31 7 Yes Yes (Methocel A15,
FG, Dow Kemi
Cull Company
Methylcellulose 3.7 20 32 2 Yes Yes (Methocel A15,
FG, Dow Kemi
Cull Company
Methylcellulose + 3.7 7 32 4 Yes Yes Aluminum hydroxide +3.7
Umm (Methocel A15, FG, Dow Chemical Company + Martyfin OL107,
Martins
Werk)
Methylcellulose + 3.7 11 32 4 Yes Yes Aluminum hydroxide +3.7
Umm (Methocel A15, FG, Dow Chemical Company + Martyfin OL107,
Martins
Werk)
Methylcellulose + 3.7 20 33 2 Yes Yes Aluminum hydroxide + 3.7
Umm (Methocel A15, FG, Dow Chemical Company + Martyfin OL107,
Martins
Werk)
Acacia rubber 25.5 11 38 11 No No
Spray rubber GD
Acacia gum 25.5 11 54 22 Yes No
Spray rubber GD
Acacia rubber 20 11 54 6 No No Spray rubber GD +10
+ Aluminum hydroxide (Marty fin OL107,
Martins
Werk)

As mentioned above, inks with high or very high viscosity reduce the use of additives for practical reasons.

  Similarly, carefully observing the table, both the type of material applied to the cigarette paper and its concentration are the parameters that have the greatest effect on the self-digestion properties of the cigarette.

  For example, polymers such as carboxymethylcellulose, methylcellulose or acacia gum are usually easy to apply and have little effect on the taste of the cigarette, so that the binder for the cigarette wrapping paper, tobacco leaf and wrapping paper As used in the cigarette paper and tobacco industry.

  In the special case of gum arabic or gum acacia, the mixture with aluminum hydroxide also enhances both the reduction of paper air permeability and the reduction of the tendency to burn even under free burning conditions. Viscosities of aqueous solutions made from 20 wt% acacia gum and 10 wt% aluminum hydroxide (wt / wt) measured in a number 4 Ford cup at room temperature range from 40 to 60 seconds.

  In the preceding description, various percentage values in various compositions represent weight percentages relative to the total weight of each composition.

  Many variations and modifications may be made in the above-described embodiments within the scope of the present invention without departing from the scope of the claims of the present invention.

Claims (5)

Wrapping paper for self-extinguishing cigarettes, wherein the coating is applied, in whole or in part, to the inner surface of the cigarette paper or the surface in contact with the cigarette, and the coating is composed of a composition that reduces the air permeability of the paper In the manufacturing method of
a) producing a composition based on gum arabic or gum acacia dissolved in water,
b) A filler that does not affect the viscosity of the rubber solution and the air permeability reduction property of the paper is added to the composition, and the filler is selected from the group consisting of aluminum hydroxide, magnesium hydroxide and calcium sulfate. Let
c) A process for producing a self-extinguishing cigarette wrapping, characterized in that the composition is deposited on a selected surface in a predetermined amount using a printing technique. The concentration of gum arabic or gum acacia in the aqueous solution is 0.15 wt% to 60 wt%, preferably 0.5 wt% to 55 wt%, more preferably 0.65 wt% to 50 wt%. A method for producing a wrapping paper for self-extinguishing cigarettes according to claim 1. The amount of filler added to the aqueous solution is 0.25 wt% to 50 wt%, preferably 2 wt% to 40 wt%, more preferably 3 wt% to 35 wt%. A method for producing a wrapping paper for self-extinguishing cigarettes according to 1. The application of the aqueous solution prepared in advance on the wrapping paper is carried out continuously or in strips by using silk screen printing, flexographic printing, photographic letterpress printing or offset printing technology, and strips are preferred A method for producing a wrapping paper for self-extinguishing cigarettes according to claim 1. The amount of aqueous solution deposited on the wrapping paper is 0.5 g / m ² to 10 g / m ² , preferably 1.5 g / m ² to 9 g / m ² , and more preferably 2 g / m ² to 7 g / m by weight. wrapper manufacturing method for self-extinguishing cigarette according to claim 1 or 4, characterized in that it is ^2.