CN107075813B

CN107075813B - Roll paper for tobacco and cigarette using the same

Info

Publication number: CN107075813B
Application number: CN201480083145.0A
Authority: CN
Inventors: 樱井亨; 北冈龙; 吉村哲哉
Original assignee: Japan Tobacco Inc
Current assignee: Japan Tobacco Inc
Priority date: 2014-12-02
Filing date: 2014-12-02
Publication date: 2020-08-11
Anticipated expiration: 2034-12-02
Also published as: EP3199702A4; EP3199702B1; PL3199702T3; CN107075813A; KR20170063816A; JPWO2016088204A1; KR101935702B1; RU2666667C1; WO2016088204A1; EP3199702A1; JP6333409B2

Abstract

The present invention provides a roll paper for tobacco, which is used for wrapping tobacco shreds, and is obtained by papermaking paper pulp with an average fiber length of 1200-1700 [ mu ] m and a drainage degree of 30-65 DEG SR, and the average thickness of the roll paper is 45-100 [ mu ] m.

Description

Roll paper for tobacco and cigarette using the same

Technical Field

The present invention relates to a tobacco wrapping paper and a cigarette using the same.

Background

In some cases, the cigarette has "stains" on the wrapping paper around which the tobacco shreds are wrapped in the cigarette rod portion, and the appearance of the cigarette is impaired. Therefore, a technique for preventing the generation of stains on the cigarette paper is required.

The cause of the stain on the tobacco wrapping paper is considered to be a result of substances contained in tobacco oozing out on the paper side at a portion where the tobacco wrapping paper comes into contact with tobacco shreds during storage of cigarettes. In addition, recently, there have been increasing cigarette products containing a large amount of flavor in tobacco shreds, and flavor contained in the tobacco shreds may permeate through tobacco wrapping paper to cause stains.

In patent document 1, the inner wrapping paper having a specific air permeability is disposed between the tobacco constituting the cigarette and the outer wrapping paper, thereby suppressing the generation of stains in the tobacco wrapping paper. Patent document 1 discloses that the weight per unit area of the inner wrap paper is at most 30g/m²。

Further, patent document 2 describes the following method: a water repellent agent made of a cellulose derivative is applied to a wrapping paper and dried to form a first layer, and a cellulose derivative is applied to the first layer to form a second layer, thereby forming a wrapping paper for tobacco impregnated with the water repellent agent, and thereby inhibiting the formation of stains on the wrapping paper for tobacco.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 3-151867

Patent document 2: specification of U.S. patent publication No. 2004/0159414

Disclosure of Invention

Problems to be solved by the invention

In the invention described in patent document 1, two types of paper rolls, i.e., an outer paper roll and an inner paper roll, must be used as the paper roll for tobacco, and this is problematic from the viewpoint of productivity and cost of cigarettes and from the viewpoint of maintaining the flavor of cigarettes.

The invention described in patent document 2 is characterized in that a water repellent such as a cellulose derivative is applied twice to a tobacco wrapping paper. Although the application of such a substance is effective for inhibiting the generation of stains, in order to obtain a sufficient effect, it is necessary to apply the substance in a large amount, and the quality of cigarette taste, combustibility and air permeability are greatly affected, and thus the degree of freedom in designing cigarettes may be impaired.

Accordingly, it is considered that there is still room for improvement in the conventional technique used from the viewpoint of suppressing the generation of stains in the tobacco wrapping paper.

Under such circumstances, an object of the present invention is to provide a tobacco wrapping paper in which the occurrence of stains is suppressed.

Means for solving the problems

The present inventors have conducted intensive studies and, as a result, have found that the generation of stains in tobacco wrapping paper is a result of components contained in tobacco shreds which cause stains traveling along fibrils of developed pulp fibers. Further, as a result of further studies, it has been found that the above problems can be solved by using a tobacco roll paper which is made of pulp having an average fiber length and a drainage degree in a specific range and has an average thickness in a specific range, and the present invention has been accomplished. In particular, the combination of the ranges of the average fiber length and the freeness defined in the present invention is greatly different from the ranges of pulp conventionally used for the production of tobacco wrapping paper.

Namely, the present invention is as follows.

[1] A roll paper for tobacco, which is used for wrapping tobacco shreds and is obtained by papermaking pulp having an average fiber length of 1200 to 1700 [ mu ] m and a drainage degree of 30 to 65 DEG SR, and which has an average thickness of 45 to 100 [ mu ] m.

[2] A roll paper for tobacco according to [1], which is obtained by papermaking of a paper pulp having an average fiber length of 1300 to 1700 μm and a drainage degree of 35 to 57 DEG SR, and which has an average thickness of 45 to 60 μm and an air permeability of 24 to 110Coresta units.

[3] A wrapping paper for tobacco as described in [1] or [2], wherein a film-forming material is added to a surface that comes into contact with tobacco shreds.

[4] A cigarette comprising a tobacco shred and a tobacco wrapping paper for wrapping the tobacco shred, wherein the tobacco wrapping paper is the tobacco wrapping paper according to any one of [1] to [3 ].

[5] The cigarette according to [4], wherein the cut tobacco contains a flavor and the content thereof is 7.5 mg/tobacco or more.

[6] The cigarette of [5], wherein the flavorant is menthol.

Effects of the invention

According to the present invention, the occurrence of stains on the tobacco wrapping paper can be suppressed.

Drawings

Fig. 1 is a graph illustrating the relationship between the average thickness of the tobacco wrapping paper and the stain generation rate.

Fig. 2 is a graph showing the relationship between the drainage degree and average fiber length of pulp used for papermaking of a tobacco wrapping paper and the evaluation of the stain reduction rate.

Detailed Description

The present invention will be described in detail below with reference to embodiments, examples, and the like, but the present invention is not limited to the embodiments, examples, and the like described below, and can be implemented by being arbitrarily changed within a range not departing from the gist of the present invention.

In the present invention, the cigarette paper for tobacco is not a cigarette paper for wrapping a filter, but is a cigarette paper for wrapping tobacco shreds constituting cigarette.

The roll paper for tobacco is obtained by papermaking of paper pulp having an average fiber length of 1200 to 1700 μm and a drainage degree of 30 to 65 DEG SR, and has an average thickness of 45 to 100 μm.

The occurrence of stains on a tobacco wrapping paper can be suppressed by using a pulp having an average fiber length of 1200 to 1700 [ mu ] m and a drainage degree of 30 to 65 DEG SR for papermaking and by setting the average thickness of the obtained wrapping paper to 45 to 100 [ mu ] m.

As one of the reasons for this, the present inventors considered that when papermaking is performed using the above-mentioned specific pulp and the average thickness of the tobacco wrapping paper is set to a specific range, the fibril structure of the pulp fiber in the tobacco wrapping paper becomes unsuitable for migration of the stain-generating component through the fibril, and contributes to the inhibition of staining.

The average fiber length of the pulp is more preferably 1300 to 1700 μm. Further, the drainage degree is more preferably 35 to 57 ° SR.

Here, the average fiber length in the present invention is an average value weighted by the length of fibers contained in the pulp used, and is a value measured by optical automatic analysis (JIS P8226-2) using unpolarized light, with a fiber count (fiber count) of 2 ten thousand or more. The freeness of the pulp of the present invention is a value measured by the Schopper-Riegler method (JISP 8121). It is considered that, by setting the average fiber length and the drainage degree to the above ranges, development of fine fibrils can be suppressed as compared with conventional common wrapping paper for tobacco, and as a result, migration of stain components from the inner paper surface in contact with tobacco shreds to the outer paper surface is less likely to occur.

The average thickness of the tobacco wrapping paper of the present invention is a value measured by a method prescribed in JIS P8118.

The pulp used for papermaking of the tobacco wrapping paper of the present invention is not particularly limited, and examples thereof include pulp made from hemp (flax) or wood, or a mixture of these pulps. Specifically, linseed pulp (flax pulp) can be mentioned.

The average fiber length and the freeness can be adjusted by changing the cooking (digestion) and beating conditions in preparing the pulp to be used.

The cooking and beating conditions may be known ones.

The paper web for tobacco of the present invention is not particularly limited as long as it is produced by a wet paper-making method comprising dispersing components including the above pulp in water to prepare a slurry and then papermaking the slurry using a wet paper-making machine.

The tobacco wrapping paper of the present invention may contain a filler.

As the filler, calcium carbonate can be exemplified.

The average thickness of the cigarette paper for tobacco of the present invention is 45 to 100 μm. In the idea of the present invention for suppressing the bleeding from the inner paper surface to the outer paper surface of the tobacco wrapping paper, the thicker the tobacco wrapping paper is, the longer the distance between the front and back paper surfaces is, and the stain generation can be effectively suppressed, and the strength as the tobacco wrapping paper can be secured. The average thickness is preferably 45 to 60 μm.

The average thickness of the tobacco wrapping paper can be adjusted by adjusting the basis weight described later, calendering described later, or the like.

The wrapping paper for tobacco of the present invention has a weight per unit area of 25 to 40gsm (g/m)²) An embodiment of (1). By having such a weight per unit area, it is possible to contribute to maintaining the strength of the tobacco wrapping paper and the cigarette flavor of the cigarette.

The basis weight of the tobacco plug can be adjusted by adjusting the content of the pulp and the content of the filler or adjusting the processing conditions of the wet paper machine.

The tobacco wrapping paper of the present invention may contain other additives within a range not impairing the effects of the present invention. As other additives, combustion improvers may be mentioned.

The combustion improver may be a hydroxy acid salt. As such a hydroxy acid salt, salts of citric acid, malic acid, tartaric acid, and the like can be used, and sodium salts and potassium salts can be used as the salts.

From the viewpoint of maintaining the combustion performance of the cigarette, the content of the combustion improver is preferably 0.1 to 5 wt%, and more preferably 0.5 to 2 wt%, based on the weight of the tobacco wrapping paper.

The tobacco wrapping paper of the present invention is preferably 24 to 110Coresta units as long as it does not affect the degree of freedom of cigarette manufacture or the degree of freedom of cigarette design.

The air permeability in the present invention means that air is supplied from one side (2 cm) of the paper under a constant pressure of 1kPa²) When passing, every 1 minute 1cm²The flow of passing (permeated) air.

The cigarette paper for tobacco of the present invention may be processed using a film-forming material on the surface that comes into contact with tobacco shreds. As such a film-forming material, known materials can be used, and examples thereof include: alginic acid and a salt thereof (for example, sodium salt), pectin, polyvinyl alcohol, ethyl cellulose, cellulose derivatives such as methyl cellulose and carboxymethyl cellulose, starch and a derivative thereof (for example, ether derivatives such as carboxymethyl starch and hydroxyalkyl starch, ester derivatives such as acetate starch, phosphate starch and octenyl succinate starch).

These film-forming materials can be used usually as an aqueous solution of 1.0 to 30.0 wt%, and can be applied by printing such an aqueous solution on the surface in contact with the tobacco shreds by an appropriate printing method such as gravure printing and, if necessary, on the opposite surface.

After the coating, the web is dried by a known appropriate method, and a film made of the material is formed so as to close a specific portion on the web, specifically, so as to close pores between fibers forming the web, or so as to follow the fibers.

When such coating is performed, the occurrence of stains in the tobacco wrapping paper can be reduced more significantly.

The application amount may be less than that used in the prior art (e.g., 0.1 to 0.3 gsm). In the conventional wrapping paper, a large amount of coating is required, and the influence on combustibility and cigarette taste quality cannot be avoided, but since a synergistic stain-reducing effect can be obtained by coating the raw paper of the present invention with the film-forming material, the influence on cigarette quality can be minimized and a good stain-reducing effect can be achieved by coating a small amount of the film-forming material.

The shape of the coating is not particularly limited. When the coating is performed by the printing method, a more excellent stain-reducing effect can be obtained by applying the coating over the entire surface.

The paper roll for tobacco of the present invention can wrap tobacco shreds by the same method as that of ordinary paper rolls.

The cigarette of the present invention comprises tobacco shreds and a tobacco wrapping paper for wrapping the tobacco shreds, wherein the tobacco wrapping paper is the tobacco wrapping paper of the present invention described above.

As the tobacco shreds, known tobacco shreds can be used, and the filling amount of the tobacco shreds can be 0.1-0.9 g/cm³And (6) filling. The cigarette of the present invention may have a filter portion, and a known cellulose acetate filter, paper filter, or the like may be used as a filter for the filter portion.

In the cigarette of the present invention, the cut tobacco may further contain a flavor. As the flavor optionally contained in the cut tobacco, there can be mentioned: oily perfumes include phenolic compounds such as vanillin, ethyl vanillin, methyl salicylate, eugenol, isoeugenol, thymol and propenyl ethyl guaiacol, cyclic and acyclic enol compounds such as maltitol, ethyl maltitol, methyl cyclopentenone and alpha-ketofuran, and cyclic and acyclic aliphatic alcohols such as menthol.

The content of the flavor is preferably 7.5 mg/cigarette or more per 1 cigarette. In the cigarette of the present invention, even if the flavor is contained in the above amount, the generation of stains can be suppressed. Therefore, the degree of freedom of product design and productivity of the cigarette is improved.

The upper limit of the amount of the flavorant is not particularly limited as long as it can be contained in the cigarette.

Examples

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples as long as the invention does not depart from the gist thereof.

< test example 1: examples 1 to 6 and comparative examples 1 to 3 >

Paper making was performed using linseed pulp having the average fiber length and the drainage degree shown in table 1, and a tobacco wrapping paper was produced in which the average thickness and the basis weight were adjusted to the values shown in table 1. The average fiber length and the freeness were adjusted by changing the cooking and beating conditions, and the average thickness was adjusted by changing the basis weight of the tobacco wrapping paper or by carrying out calendering. The tobacco wrapping paper was used to obtain the items shown in table 1. In table 1, the tensile strength, air permeability, and stain generation rate were determined by the following methods. Fig. 1 shows the results of the experiments shown in table 1, which are plotted as the relationship between the average thickness of the tobacco wrapping paper and the stain generation rate.

The tobacco wrapping paper of comparative examples 1 to 3 is a standard used as a normal tobacco wrapping paper.

< method for determining stain occurrence Rate >

Cigarettes (length of cigarette rod portion 68mm, diameter 7.9mm, type of tobacco shred American Mixed tobacco shred, tobacco shred filling density 0.21 g/cm) were produced using tobacco shreds with flavor (menthol) added to each cigarette wrapper roll³And the amount of perfume added was 7.8 mg/root), the cigarettes were packed in a cigarette container made of 20 pieces of paper, and stored in a closed state at 22 ℃ and 60% relative humidity for 28 days, and the stain generation rate was determined according to the following evaluation criteria. The stain generation rate of the cigarette paper is influenced by the type and filling density of the tobacco filler in the cigarette, and the type and amount of the flavor added to the tobacco filler, considering that the stain of the cigarette paper is developed due to some components contained in the tobacco filler or the flavor added to the tobacco filler leaking out to the cigarette paper. In this test, the conditions for the tobacco shreds and the flavors were unified and the test was performed.

In a cigarette, a stain-producing roll is defined as a cigarette in which three or more stains having a maximum diameter of 1mm or more or one or more stains having a maximum diameter of 3mm or more are produced on wrapping paper. Looking at 200, the stain production rate is the ratio of the number of produced stain rolls to the number of cigarettes overall.

As the stain evaluation, the case where the stain generation rate was less than 35% was defined as "o … effective", the case where the stain generation rate was 35% or more and less than 45% was defined as "Δ … slightly effective", and the case where the stain generation rate was 45% or more was defined as "x … ineffective". As described above, since the stain generation rate is affected not only by the specifications of the tobacco wrapping paper but also by the conditions of the tobacco shreds and the flavor, the evaluation was made to improve the stain generation rate with respect to the commonly used tobacco wrapping paper for the purpose of simplifying the evaluation.

< determination of tensile Strength >

The tensile strength was measured for each of the tobacco wrapping papers by a method of testing paper and cardboard-tensile properties according to JIS P8113 "to obtain a tensile strength of 15mm in width.

< measurement of air Permeability >

The air permeability was measured using PPM1000 manufactured by FILTRONA corporation.

TABLE 1

The "calendering" and "surface coating" in table 1 were performed by the following procedure.

< calendering processing >

The tobacco roll paper of comparative example 4 was obtained by calendering the tobacco roll paper of example 2 using a calendering apparatus. The processing apparatus includes a calender roll and a press roll, which is directed toward the calender roll and presses at a given line pressure, specifically, at a line pressure of 5.9N per mm. The calendering process may be carried out by passing a web for tobacco between a calender roll and a press roll. Generally, the average thickness of the tobacco wrapping paper is reduced by calendering, and the air permeability is reduced.

< surface coating >

A Low methoxy (Low method) pectin solution (1.8 wt%) having an esterification degree of 6 to 12 was applied to the entire surface of one side of the tobacco web by using a simple gravure coater. The tobacco wrapper of comparative example 3 was coated with the tobacco wrapper of comparative example 2 in an amount of 0.2 gsm. The tobacco wrapper of example 3 was coated with the tobacco wrapper of example 2 at an amount of 0.2 gsm. The coating speed was set at 4 m/min. In both comparative example 3 and example 3, only the surface located inside in the cigarette was coated.

After the coating, the coating is dried under heating at 90 to 95 ℃.

Examples 1 and 6 are comparisons of wrapping papers for tobacco, which are different in filler and have the same three main physical properties of average fiber length, drainage and average thickness, to which the present invention is directed. The filler is considered to have no influence on the stain generation rate because the stain generation rate is the same even if the filler is different, as long as the three main physical properties, i.e., the average fiber length, the drainage degree, and the average thickness, are the same.

As is clear from comparison between example 6 and comparative example 2, the stain generation rate differs among the three main physical properties of the average fiber length, the drainage degree and the average thickness to which the present invention is directed only when the drainage degree differs greatly. Comparative example 2 having a freeness of 70 ° SR had a stain generation rate of 56%, compared to example 1 having a freeness of 57 ° SR, which had a stain generation rate of 28%.

According to the comparison between example 2 and comparative example 4, the average thickness of the three main physical properties of the average fiber length, the drainage degree, and the average thickness to which the present invention is directed was changed by the presence or absence of calendering on the wrapping paper for tobacco. From this comparison, it is found that the stain generation rate is different only when the average thickness is greatly different. The stain generation rate of comparative example 4 having a thickness of 35 μm was 85%, compared to 15% for example 2 having an average thickness of 55 μm.

As is clear from a comparison between example 1 and example 4, the weight per unit area of the tobacco wrapper paper was changed to change the average thickness of the three main physical properties of the average fiber length, the drainage degree, and the average thickness to which the present invention is directed. From this comparison, it is found that the stain generation rate is different only when the average thickness is greatly different. The stain generation rate of example 4 having an average thickness of 47 μm was 41%, compared to 28% for example 1 having an average thickness of 52 μm.

Comparative example 3 was obtained by applying a small amount of surface coating to the tobacco wrapper paper of comparative example 2, and the average fiber length, the drainage degree, and the average thickness were substantially the same. In example 3, the tobacco wrapper paper of example 2 was surface-coated with a small amount of the same fiber length, water permeability, and average thickness. In contrast to the tobacco wrapping paper having a high stain generation rate in the stage where no surface coating treatment was performed (comparative example 2), which had substantially no effect of reducing the stain generation rate even when a small amount of surface coating was performed, the tobacco wrapping paper having a low stain generation rate in the stage where no surface coating treatment was performed (example 2), which had a significantly reduced stain generation rate when a small amount of surface coating was performed, was observed.

< test example 2 >

A sizing agent was prepared by dispersing linseed pulp (average fiber length: 1460 μm, drainage degree: 45 DEG SR) in water so that it was 0.7 wt%. The resulting web was subjected to wet papermaking using a fourdrinier papermaking machine, and subjected to dehydration drying, thereby obtaining a tobacco wrapper having an average thickness of 58.1 μm and a weight per unit area of 32.9 gsm.

Further, by changing the above-mentioned cooking and beating conditions of the flax pulp, flax pulp having a changed average fiber length and drainage degree in a plurality of grades was produced. Using these flax pulps, papermaking was carried out while paying attention to the fact that the average thickness was not significantly changed from the above-mentioned 58.1. mu.m, and thus, a plurality of grades of wrapping paper for tobacco were produced. The average thickness is 51.0 to 58.1 μm.

Cigarettes were produced by wrapping tobacco shreds having flavor added thereto with a plurality of grades of tobacco wrapping paper (length of cigarette rod portion 68mm, diameter 7.9mm, type of tobacco shreds American Mixed tobacco shreds, and tobacco shred filling density 0.20 g/cm)³And 7.5mg of perfume added per cigarette), the cigarettes were packed in a 20-piece cigarette-packing container, and stored in a closed state at 22 ℃ and 60% relative humidity for 28 days, and the stain generation rate was determined based on the following evaluation criteria, and the stain evaluation was performed.

The stain generation rate [% ] was calculated by the same method as in test 1. The stain evaluation was also represented by "∘", "Δ" and "x" based on the improvement width of the stain generation rate with respect to the normally used tobacco wrapping paper, in the same manner as in test 1 described above.

The results are shown in FIG. 2. In the figure, the horizontal axis represents the average fiber length of the pulp used for papermaking, and the vertical axis represents the freeness of the pulp used for papermaking.

It is found that the tobacco wrapping paper having a long average fiber length and a small drainage degree has a low stain generation rate.

It is found that the average fiber length of the pulp used for papermaking is 1200 μm or more and the drainage degree is 65 ° SR or less as conditions under which the effect of improving the stain generation rate can be confirmed. Further, it is found that the average fiber length of the pulp used for papermaking is 1300 μm or more and the drainage degree is 57 ° SR or less as conditions for improving the effect of improving the stain generation rate.

The upper limit of the average fiber length of the pulp used for papermaking and the lower limit of the drainage degree are set within ranges from the viewpoint of ensuring general physical properties such as productivity and air permeability of the tobacco wrapping paper, and are not set from the viewpoint of the stain generation rate.

The tobacco wrapping paper of the present invention can satisfactorily reduce the occurrence of stains even when the tobacco wrapping paper is not formed into two layers as in the conventional art or surface coating using a large amount of a coating agent is performed. Thus, the productivity of the cigarette paper for tobacco and the cigarette using the same can be improved, and the cost can be reduced. In addition, when the surface of the tobacco wrapping paper of the present invention is coated, the effect of reducing the generation of stains can be further improved even if the amount of coating is small. By using the cigarette paper for tobacco, even if a flavor such as menthol is contained in the tobacco shred more than usual, the generation of stains can be suppressed.

The pulp used for producing the tobacco plug paper of the present invention has a combination of the average fiber length and the range of the freeness, which is greatly different from the range conventionally used. In the present invention, it is important to use, as a raw material, a pulp having a drainage degree and an average fiber length each in a specific range defined in the present invention, and to obtain a paper web having a specific thickness.

Claims

1. A roll paper for tobacco, which is used for wrapping tobacco shreds, is obtained by papermaking from pulp having an average fiber length of 1200 to 1700 [ mu ] m and a drainage degree of 30 to 65 DEG SR, has an average thickness of 45 to 100 [ mu ] m, and is hemp pulp, wood pulp, or a mixture thereof.

2. A tobacco roll paper according to claim 1, which is obtained by papermaking of a paper pulp having an average fiber length of 1300 to 1700 μm and a drainage degree of 35 to 57 DEG SR, and which has an average thickness of 45 to 60 μm and an air permeability of 24 to 110Coresta units.

3. A rolled tobacco sheet according to claim 1 or 2, wherein a film-forming material is added to a surface that comes into contact with the cut tobacco.

4. A cigarette comprising a cut tobacco and a tobacco wrapping paper for wrapping the cut tobacco, wherein the tobacco wrapping paper is the tobacco wrapping paper according to any one of claims 1 to 3.

5. A cigarette according to claim 4 wherein said cut tobacco contains a flavorant and is contained in an amount of 7.5 mg/tobacco or more.

6. A cigarette according to claim 5 wherein said flavourant is menthol.