CN107075813B - Tobacco rolling paper and cigarette using the same - Google Patents

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

Tobacco rolling paper and cigarette using the same

technical field

The present invention relates to a tobacco wrapper and a cigarette using the tobacco wrapper.

Background technique

In the case of cigarettes, "smudges" may be generated on the wrapping paper of the shredded tobacco in the cigarette rod portion, thereby impairing the appearance. Therefore, a technique that does not cause stains on the cigarette wrapping paper is required.

The main cause of stains on the tobacco wrapping paper is considered to be caused by the exudation of substances contained in the tobacco on the wrapping paper side at the portion where the tobacco wrapping paper and the shredded tobacco come into contact with the tobacco wrapping paper during storage of the cigarette. In addition, recently, cigarette products containing a large amount of flavor in the cut tobacco have increased, and the flavor contained in the cut tobacco may ooze out of the tobacco wrapping paper to cause stains.

In Patent Document 1, by arranging the inner wrapping paper having a specific air permeability between the tobacco constituting the cigarette and the outer wrapping paper, the occurrence of stains on the tobacco wrapping paper is suppressed. The basis weight of the inner roll paper is described in Patent Document 1 as being at most 30 g/m ² .

In addition, Patent Document 2 describes a method of forming a first layer by applying a water repellant made of a cellulose derivative to a roll paper and drying it, and then forming a second layer by applying a cellulose derivative thereon. Tobacco wrapping paper impregnated with a water repellent is formed in two layers, thereby suppressing the occurrence of stains on the tobacco wrapping paper.

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Laid-Open No. 3-151867

Patent Document 2: Specification of US Patent Publication No. 2004/0159414

SUMMARY OF THE INVENTION

The problem to be solved by the invention

In the invention described in the above-mentioned Patent Document 1, two types of wrapping paper, the outer wrapping paper and the inner wrapping paper, must be used as the tobacco wrapping paper, which poses a problem from the viewpoints of productivity, cost, and retention of the cigarette flavor of the cigarette. of.

The invention described in Patent Document 2 is characterized in that a water-repellent agent such as a cellulose derivative is coated twice on the tobacco wrapping paper. Although applying such a substance is effective in suppressing the generation of stains, in order to obtain a sufficient effect, it is necessary to apply a large amount of coating, which greatly affects the quality of cigarette flavor, burnability, and air permeability, so it may be damaged. Freedom in cigarette design.

Therefore, it is considered that there is still room for improvement in the conventional technology used from the viewpoint of suppressing the occurrence of smudges in the tobacco wrapping paper.

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

methods for solving problems

As a result of intensive research, the present inventors speculated that the occurrence of smearing in the tobacco wrapping paper is caused by the fact that the smear-causing component contained in the cut tobacco travels along the fibrils of the developed pulp fibers. Furthermore, as a result of further studies, it was found that the above-mentioned problems can be solved by using pulp having an average fiber length and freeness in a specific range for papermaking and a tobacco rolling paper having an average thickness in a specific range, and the present invention has been realized. invention. In particular, the combination of the range of the average fiber length and the freeness defined in the present invention is very different from the range of the pulp used in the manufacture of conventional tobacco wrapping paper.

That is, this invention is as follows.

[1] Tobacco wrapping paper for wrapping cut tobacco, the tobacco wrapping paper obtained by making paper pulp having an average fiber length of 1200 to 1700 μm and a water freeness of 30 to 65°SR , the average thickness of the roll paper is 45-100 μm.

[2] The tobacco rolling paper according to [1], which is obtained by making paper pulp having an average fiber length of 1300 to 1700 μm and a water freeness of 35 to 57°SR, and the average thickness of the rolled paper It is 45-60 μm, and the air permeability is 24-110 Coresta units.

[3] The tobacco rolling paper according to [1] or [2], wherein a film-forming material is added to the surface in contact with the shredded tobacco.

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

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

[6] The cigarette according to [5], wherein the flavor is menthol.

Invention effect

According to the present invention, it is possible to suppress the occurrence of stains on the tobacco rolling paper.

Description of drawings

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

FIG. 2 is a graph showing the relationship between the freeness and the average fiber length of the pulp used in the papermaking of the tobacco rolling paper, and the evaluation of the smear reduction rate.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to embodiments, examples, and the like, but the present invention is not limited to the following embodiments, examples, and the like, and can be implemented with arbitrary modifications without departing from the gist of the present invention.

In the present invention, the tobacco wrapping paper refers to a wrapping paper for wrapping shredded tobacco constituting a cigarette, not a wrapping paper for wrapping a filter.

The tobacco rolling paper of the present invention is obtained by making paper pulp having an average fiber length of 1200 to 1700 μm and a freeness of 30 to 65°SR, and has an average thickness of 45 to 100 μm.

By making paper using pulp having an average fiber length of 1200 to 1700 μm and a freeness of 30 to 65°SR, and making the average thickness of the resulting roll paper 45 to 100 μm, it is possible to suppress the occurrence of stains on the tobacco roll paper. .

As one of the reasons for this, the present inventors believe that the fibril structure of the pulp fiber in the tobacco rolling paper becomes unsuitable by making paper using the above-mentioned specific pulp and making the tobacco rolling paper have an average thickness in a specific range. The stain-generating component moves through the fibrils and contributes to the suppression of stains.

The average fiber length of the above-mentioned pulp is more preferably 1300 to 1700 μm. Moreover, it is more preferable that it is 35-57 degreeSR about the degree of freeness.

Here, the average fiber length in the present invention refers to the length-weighted average value of fibers contained in the pulp used, and is measured by an optical automatic analysis (JIS P8226-2) using unpolarized light with a fiber count of 20,000 or more. value. In addition, the freeness of the pulp of this invention means the value measured by the Schopper-Riegler method (JISP8121). It is considered that by setting the average fiber length and the water freeness to the above ranges, the development of fine fibrils can be suppressed compared with the conventional general tobacco wrapping paper, and as a result, the stain components are less likely to be generated from the shredded tobacco. Movement of the contacted inner sheet to the outer sheet.

In addition, the average thickness of the tobacco wrapping paper of this invention is the value measured by the method prescribed|regulated by JIS P 8118.

Although it does not specifically limit as a pulp used for papermaking of the wrapping paper for tobacco of this invention, Pulp using hemp (flax) or wood as a raw material, or a mixture of these pulps can be mentioned. Specifically, flax pulp can be mentioned.

By changing the conditions of digestion and beating at the time of preparing the pulp to be used, the average fiber length and the degree of drainage can be adjusted.

Well-known conditions can be employ|adopted for the conditions of cooking and beating.

The papermaking method of the tobacco rolling paper of the present invention includes, but is not particularly limited to, a wet papermaking method comprising dispersing components including the above-mentioned pulp and the like in water to prepare Slurry was formed, and papermaking was carried out using a wet paper machine.

The tobacco rolling paper of the present invention may also contain fillers.

As the filler, calcium carbonate can be exemplified.

The average thickness of the tobacco rolling paper of the present invention is 45 to 100 μm. In the idea of the present invention for suppressing bleed-out from the inner side to the outer side of the tobacco rolling paper, the thicker the tobacco rolling paper is, the longer the distance between the front and back side of the paper is, the generation of stains can be effectively suppressed, and the Ensure the strength as a tobacco roll. As an average thickness, 45-60 micrometers can be mentioned preferably.

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

An embodiment in which the basis weight of the tobacco rolling paper of the present invention is 25 to 40 gsm (g/m ² ) can be mentioned. Having such a basis weight contributes to maintaining the strength of the tobacco wrapping paper and the cigarette flavor of the cigarette.

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

In addition, as the tobacco wrapping paper of this invention, other additives may be contained in the range which does not impair the effect of this invention. As other additives, a combustion accelerant can be mentioned.

Examples of the combustion accelerant include hydroxy acid salts. As such a hydroxy acid salt, salts such as citric acid, malic acid, and tartaric acid can be used, and as these salts, for example, sodium salts and potassium salts can be used.

From the viewpoint of appropriately maintaining the combustion performance of the cigarette, the content of the combustion accelerant is 0.1 to 5% by weight, preferably 0.5 to 2% by weight, based on the weight of the tobacco wrapping paper.

The tobacco rolling paper of the present invention may be in a range that does not affect the degree of freedom of manufacture and design of cigarettes, and is preferably 24 to 110 Coresta units.

It should be noted that the air permeability in the present invention refers to the flow rate of air passing (permeating) per 1 minute·1 cm ² when air is passed through one side (2 cm ² ) of paper under a constant pressure of 1 kPa.

The tobacco rolling paper of the present invention may be processed using a film-forming material on the surface in contact with the shredded tobacco. As such a film-forming material, known materials can be used, and examples thereof include alginic acid and its salts (eg, sodium salts), pectin, polyvinyl alcohol, ethyl cellulose, methyl cellulose, and carboxymethyl cellulose. Such cellulose derivatives, starch and derivatives thereof (eg ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, esters such as starch acetate, phosphate starch and octenyl succinate starch derivative).

These film-forming materials can usually be used in the form of an aqueous solution of 1.0 to 30.0% by weight, and such an aqueous solution can be printed on the surface in contact with the shredded tobacco by using an appropriate printing method such as gravure printing, and, if necessary, on the opposite side. surface, thereby coating.

After coating, it is dried by a known appropriate method so as to block a specific portion on the roll paper, specifically, to block pores between fibers forming the roll paper, or along the fibers. A film composed of the above-mentioned materials is formed.

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

The coating amount may be less (eg, 0.1-0.3 gsm) than used in the prior art. In the conventional wrapping paper, a large amount of coating is required, and the influence on the flammability and cigarette taste quality cannot be avoided. However, by coating the film-forming material on the raw paper of the present invention, a synergistic contamination reduction effect can be obtained. Therefore, , By applying a small amount of film-forming material, the impact on the quality of cigarettes can be minimized, and a good pollution reduction effect can be achieved.

In addition, the shape of application is not particularly limited. In the case of coating using the above-described printing method, a more excellent contamination reduction effect can be obtained by coating the entire surface.

The tobacco wrapping paper of the present invention can be used to wrap shredded tobacco by the same method as that of ordinary wrapping paper.

The cigarette of the present invention includes shredded tobacco and a tobacco wrapper for wrapping the shredded tobacco, and the tobacco wrapper is the tobacco wrapper of the present invention described above.

As the shredded tobacco, known shredded tobacco can be used, and the filling amount of the shredded tobacco can be usually filled at 0.1 to 0.9 g/cm ³ . Moreover, the cigarette of this invention may have a filter part, and a well-known cellulose acetate filter, a paper filter, etc. can be used as a filter used for the filter part.

In the cigarette of the present invention, the cut tobacco may further contain a flavor. Examples of flavors optionally contained in cut tobacco 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, ethylmaltitol, methylcyclopentenone, α-ketofuran, etc., and oily fragrances such as cyclic and acyclic aliphatic alcohols such as menthol.

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

In addition, as an upper limit of content of a flavor, if it is an amount which can be contained in a cigarette, there is no restriction|limiting in particular.

Example

Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to the description of the following examples as long as the gist of the present invention is not exceeded.

<Test Example 1: Examples 1 to 6, Comparative Examples 1 to 3>

Papermaking was carried out using the flax pulp having the average fiber length and freeness shown in Table 1, and the tobacco rolling paper whose average thickness and basis weight were adjusted to the values described in Table 1 was produced. The adjustment of the average fiber length and the degree of freeness was performed by changing the conditions of cooking and beating, and the average thickness was adjusted by changing the basis weight of the tobacco wrapping paper or performing calendering treatment. The items shown in Table 1 were obtained using these tobacco rolling papers. In addition, in Table 1, about the tensile strength, the air permeability, and the stain generation rate, the following methods were used and it calculated|required. In addition, the results of graphing the experimental results shown in Table 1 in the form of the relationship between the average thickness of the tobacco wrapping paper and the smear generation rate are shown in FIG. 1 .

In addition, the tobacco wrapping paper of Comparative Examples 1-3 is the specification used as a normal tobacco wrapping paper.

<How to Calculate the Smudge Occurrence Rate>

Flavor (menthol)-added shredded tobacco was wrapped with each tobacco wrap to produce cigarettes (the length of the cigarette rod is 68 mm, the diameter is 7.9 mm, the type of shredded tobacco is American blended shredded tobacco, the filling density of shredded tobacco is 0.21 g/cm ³ , and the flavor is added. 7.8 mg/cigarette), 20 paper cigarette containers were filled with the above-mentioned cigarettes, and the cigarettes were stored in a closed state at a temperature of 22° C. and a relative humidity of 60% for 28 days. Contamination was determined according to the following evaluation criteria. trace production rate. Considering that the smudges of the tobacco wrapping paper appear due to the exudation of some components contained in the cut tobacco or the flavors added to the cut tobacco to the tobacco wrapping paper, the occurrence rate of the smudges is affected by the type of the cut tobacco filled in the cigarette, Influence of filling density, and the type and amount of flavoring added to cut tobacco. In this test, these conditions regarding the cut tobacco and flavor were unified and the experiment was performed.

For one cigarette, three or more stains with a maximum diameter of 1 mm or more, or one or more stains with a maximum diameter of 3 mm or more were generated on the wrapping paper, and were defined as stained rolls. 200 cigarettes were observed, and the stain generation rate was the ratio of the number of stained rolls to the total number of cigarettes.

As the stain evaluation, the above-mentioned stain occurrence rate of less than 35% was defined as "○...effective", the stain generation rate of 35% or more and less than 45% was defined as "△...slightly effective", and the The case where the stain generation rate was 45% or more was defined as "x... invalid". As described above, the stain generation rate is affected not only by the specifications of the tobacco wrapping paper but also by the conditions of the shredded tobacco and flavor. Therefore, in order to simplify the evaluation, the contamination rate relative to the commonly used tobacco wrapping paper is determined. The magnitude of improvement in the trace generation rate was evaluated.

<Measuring method of tensile strength>

In addition, regarding the tensile strength, the tensile strength of the width|variety 15mm was calculated|required about each tobacco rolling paper based on JIS P 8113 "Paper and paperboard - Test method of tensile properties.

<Measurement of air permeability>

The measurement of the air permeability was performed using PPM1000 manufactured by FILTRONA.

Table 1

About "calendering" and "surface coating" in Table 1, it performed by the following procedure.

＜ Calendering ＞

The tobacco wrapping paper of Comparative Example 4 was obtained by calendering the tobacco wrapping paper of Example 2 using a calendering apparatus. The processing device includes a calender roll and a pressing roll, and the pressing roll faces the calender roll and extrudes with a given linear pressure, specifically, at a linear pressure of 5.9 N per mm. The calendering process can be carried out by passing the tobacco wrapping paper between calender rolls and press rolls. In general, by calendering, the average thickness of the tobacco wrapping paper is reduced, and the air permeability is reduced.

＜Surface coating＞

A low methoxy (Low methoxy) pectin solution (1.8 wt %) having a degree of esterification of 6-12 was applied to the entire surface of one side of the tobacco wrapping paper using a simple gravure coater. The tobacco wrapping paper of Comparative Example 3 was coated on the tobacco wrapping paper of Comparative Example 2 in an amount of 0.2 gsm. In addition, the tobacco wrapping paper of Example 3 was coated on the tobacco wrapping paper of Example 2 in an amount of 0.2 gsm. The coating speed was set to 4 m/min. Both Comparative Example 3 and Example 3 were coated only on the inner surface at the time of cigarette rolling.

After coating, it was made to dry using 90-95 degreeC as a heating condition.

Example 1 and Example 6 are comparisons of tobacco rolled papers with the same three main physical properties of average fiber length, water freeness, and average thickness, which are the focus of the present invention, but with different fillers. As long as the three main physical properties of the average fiber length, water freeness, and average thickness are the same, even if the filler is different, the stain generation rate is the same degree, so it can be considered that the filler does not affect the stain generation rate.

From the comparison between Example 6 and Comparative Example 2, it can be seen that, among the three main physical properties of average fiber length, water freeness and average thickness, which are the focus of the present invention, stains are generated only when water freeness is greatly different. rate is different. The stain generation rate of Comparative Example 2 with a freeness degree of 70°SR was 56%, as compared to that of Example 1 with a freeness degree of 57°SR of 28%.

According to the comparison between Example 2 and Comparative Example 4, among the three main physical properties of average fiber length, water freeness, and average thickness, which are the focus of the present invention, the average thickness is determined by the presence or absence of calendering of the tobacco wrapping paper. change. From this comparison, it can be seen that the stain generation rate is different only when the average thickness is greatly different. The smudge generation rate of Comparative Example 4 having a thickness of 35 μm was 85%, compared to 15% of Example 2 having an average thickness of 55 μm.

From the comparison between Example 1 and Example 4, it can be seen that among the three main physical properties of average fiber length, water freeness, and average thickness, which are the focus of the present invention, the average thickness is changed by changing the basis weight of the tobacco wrapping paper. change. From this comparison, it can be seen that the stain generation rate is different only when the average thickness is greatly different. The stain generation rate of Example 4 with an average thickness of 47 μm was 41%, compared to 28% of Example 1 with an average thickness of 52 μm.

Comparative Example 3 was obtained by applying a small amount of surface coating to the tobacco rolling paper of Comparative Example 2, and the average fiber length, water freeness, and average thickness were basically the same. In addition, Example 3 was obtained by applying a small amount of surface coating to the tobacco rolling paper of Example 2, and the average fiber length, water freeness, and average thickness were the same. For the tobacco wrapping paper (Comparative Example 2) with a high smear generation rate at the stage of no surface coating treatment, even if a small amount of surface coating was applied, there was basically no effect of reducing the smear generation rate. With respect to the tobacco rolling paper (Example 2) with a low smear generation rate at the stage of no surface coating treatment, it was observed that the smear generation rate was greatly reduced by applying a small amount of surface coating.

<Test Example 2>

A slurry was prepared by dispersing flax pulp (average fiber length: 1460 μm, freeness: 45°SR) in water so as to be 0.7% by weight. This was subjected to wet papermaking using a Fourdrinier paper machine, and dewatered and dried to obtain a tobacco rolling paper having an average thickness of 58.1 μm and a basis weight of 32.9 gsm.

Furthermore, by changing the cooking and beating conditions of the above-mentioned flax pulp, several grades of flax pulp having changed average fiber length and freeness were produced. Using these flax pulps, the papermaking was performed so that the average thickness did not change significantly from the above-mentioned 58.1 μm, and tobacco rolling papers of several grades were produced. The average thickness is 51.0 to 58.1 μm.

Flavored shredded tobacco was rolled using various grades of tobacco wrapping paper to make cigarettes (the length of the cigarette rod is 68mm, the diameter of 7.9mm, the type of shredded tobacco is American blended shredded tobacco, the filling density of shredded tobacco is 0.20g/cm ³ , the amount of flavor added 7.5 mg/cigarette), 20 paper cigarette containers were filled with the above-mentioned paper cigarettes, and they were stored in a closed state under the conditions of a temperature of 22° C. and a relative humidity of 60% for 28 days, and the contamination was obtained according to the following evaluation criteria. The smear generation rate was evaluated.

The stain generation rate [%] was calculated by the same method as in Test 1 above. The stain evaluation is also the same as in the above-mentioned Test 1, and is represented by "◯", "Δ", and "x" based on the improvement range of the stain generation rate relative to the commonly used tobacco wrapping paper.

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 can be seen that the smear generation rate is reduced in the tobacco rolling paper with a long average fiber length and a small water freeness.

It was found that the average fiber length of the pulp used for papermaking was 1200 μm or more, and the water freeness was 65°SR or less, as conditions for confirming the effect of improving the stain generation rate. In addition, it was found that the average fiber length of the pulp used for papermaking was 1300 μm or more and the water freeness was 57°SR or less as conditions for improving the effect of improving the stain generation rate.

It should be noted that the upper limit of the average fiber length and the lower limit of the water freeness of the pulp used for papermaking are set in the range from the viewpoint of ensuring general physical properties such as the productivity and air permeability of the tobacco wrapping paper, and are not It is set from the viewpoint of the smear generation rate.

In the tobacco wrapping paper of the present invention, the occurrence of stains can be reduced favorably even if the tobacco wrapping paper is not made into two layers as in the prior art, or the surface coating using a large amount of coating agent is performed. . Thereby, the productivity of the wrapping paper for tobacco and the cigarette using the same can be improved, and cost reduction can be achieved. In addition, in the case of applying the surface coating to the tobacco wrapping paper of the present invention, the effect of reducing the occurrence of stains can be further enhanced even though the coating amount is small. By using this tobacco rolling paper, even if more flavors such as menthol are contained in the cut tobacco than usual, the generation of stains can be suppressed.

In the pulp used for the manufacture of the tobacco rolling paper of the present invention, the combination of the average fiber length and the range of the freeness is very different from the range that has been conventionally used. In the present invention, it is important to use pulp having a water freeness and an average fiber length within the specific ranges defined in the present invention as a raw material, and that the roll paper obtained by making paper has a specific thickness.

Claims (6)

1. A tobacco rolling paper, which is used for wrapping shredded tobacco, wherein the tobacco rolling paper is obtained by making paper pulp with an average fiber length of 1200 to 1700 μm and a water freeness of 30 to 65°SR, The average thickness of the roll paper is 45-100 μm, and the pulp is hemp pulp, wood pulp, or a mixture thereof. 2 . The tobacco rolling paper according to claim 1 , which is obtained by making paper pulp with an average fiber length of 1300 to 1700 μm and a water freeness of 35 to 57°SR, and the average thickness of the rolled paper is 45 . ~60μm, the air permeability is 24~110 Coresta units. 3. The tobacco rolling paper according to claim 1 or 2, wherein a film-forming material is added to a surface in contact with shredded tobacco. 4 . A cigarette comprising cut tobacco and a tobacco wrap for wrapping the cut tobacco, wherein the tobacco wrap is the tobacco wrap according to any one of claims 1 to 3 . 5 . The cigarette according to claim 4 , wherein the shredded tobacco contains flavor, and the content thereof is 7.5 mg/cigarette or more. 6 . 6. The cigarette of claim 5, wherein the flavor is menthol.

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