JP2009191393A - Cigarette paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide cigarette paper that has sufficient air permeability and strength and yet has excellent removal performance of harmful substance derived from sidestream smoke (especially offensive smell substance). <P>SOLUTION: The cigarette paper is obtained by papermaking from a paper raw material including a zeolite-pulp composite material and pulp at a weight ratio of solid content of 70:30-30:70, and contains 15-35 wt.% of zeolite. The "zeolite-pulp" composite material is a composite material of pulp and zeolite internally having zeolite in a pulp entity. The inside of pulp entity means the inside part of a polymer material constituting pulp. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a novel cigarette paper, and more particularly to a cigarette paper having sufficient air permeability and strength, and excellent in removing harmful substances derived from sidestream smoke.

  From smoking articles such as cigarettes, mainstream smoke sucked by the smoker through the smoking article main body and sidestream smoke rising from the ignition tip of the smoking article during natural combustion are generated. In general, it is said that sidestream smoke has a greater adverse effect on the human body than mainstream smoke.

Therefore, there has been a proposal in the past for cigarettes to contain fine carbon in the cigarettes in order to reduce the amount of sidestream smoke generated. However, a binder is necessary for containing fine carbon in the wrapping paper, and even if a binder is added, there is a risk of peeling off from the wrapping paper, and the effect is not sufficient. Therefore, recently, a smoking article that is wound twice with a wrapping paper containing carbon fiber at a rate of 5 g / m ² or more inside and a wrapping paper containing no carbon material on the outside (Patent Document 1), etc. Has also been proposed, but wrapping the wrapping paper has led to a decrease in cigarette productivity and cost, and a tendency to decrease flammability, which is one of the important performance requirements for the wrapping paper. It becomes. These proposals aim to reduce sidestream smoke itself, but cigarette paper that reduces harmful substances in sidestream smoke (to remove harmful substances in sidestream smoke) has also been proposed. Patent Document 2 states that a wrapping paper in which basic calcium phosphate powder is mixed or adsorbed on the surface can reduce the amount of tar in the sidestream smoke and the amount of heavy metals such as cadmium and lead. However, of the adverse effects on the human body caused by sidestream smoke, bad odor damage is the most common problem, and the proposal in Patent Document 2 has a countermeasure for the problem of removing malodorous substances (components) in sidestream smoke. Not shown.

  By the way, flax is mainstream as a raw material for cigarette paper such as cigarette paper, and cannabis is used as other non-wood pulp. However, since non-wood pulp is very expensive, it is common to mix with wood pulp. Note that flax pulp is excellent in that it is easy to obtain a high-purity pulp, has good flammability, is excellent in taste, has a relatively high strength, and provides highly opaque paper. However, the properties for high-porosity cigarette paper effective in reducing the amount of tar are not sufficient.

In addition, cigarette paper is very light paper (usually having a basis weight of 21 to 22 g / m ² (Japan), 25 to 26 g / m ² (USA), 15 to 55 g / m ² (Europe)). Tobacco hoists usually roll cigarettes with cigarette paper at a high speed of 8000 to 14,000 cigarettes / min. Therefore, cigarette paper is extremely thin and has high mechanical suitability (mechanical strength such as tensile strength). ) Is also required.

  General requirements for cigarette paper include (1) combustibility and (2) high-speed mechanical suitability (strength), (3) self-extinguishing properties, (4) uniform texture, (5) water Examples include uniform marking and press marking, (6) high opacity, (7) paper is pure white, and (8) ash is pure white. The cigarette paper flammability is a problem even if the burning speed is too fast, and usually a combustor (for example, tartrate, citrate, etc.) so that the fire does not extinguish when smoking. , Phosphate, nitrate, etc.) are applied in the papermaking process.

As described above, cigarette paper is said to be suitable for low tar tobacco as the porosity increases. In other words, when the cigarette paper has a high porosity, air enters from the side through the cigarette paper when smoking, so that the smoke is thinned and the generated tar content is reduced. However, cigarette paper having a high porosity (usually said to have an air permeability of 180 ml / min or more) that is effective in reducing tar content without reducing the strength of the paper is generally obtained by a paper-making process. In recent years, there has been a method in which paper obtained by papermaking is passed between a large number of electrodes arranged on a plate-shaped or roll-shaped ground and discharged to form openings. It has been broken. However, the increase in the number of processes and the need for a hole-opening device cannot avoid the problems of productivity and high cost. In addition to the discharge, a method using a machine, a method using a laser, and the like have been developed in addition to discharging, but have the same problems.
JP 2003-189840 A JP 2000-287667 A JP-T-2004-508470 JP 2005-523389 A JP 11-315492 A

In view of the above circumstances, the problem to be solved by the present invention is that there is sufficient air permeability and strength without performing a hole-opening treatment after the paper making process, and there are harmful substances (particularly malodorous substances) derived from sidestream smoke. It is to provide a cigarette wrapping paper that is excellent in removing performance.
Further, by providing a cigarette paper not only having sufficient air permeability and strength, and excellent sidestream smoke-derived harmful substance removal performance, but also exhibiting an appropriate combustibility without adding a combustion control agent. is there.

  As a result of diligent research to solve the above-mentioned problems, the present inventor has mixed basic quantities of zeolite-pulp composite with raw material pulp to obtain basic physical properties required for cigarette paper (basis weight, combustibility, self Cigarette paper that has sufficient breathability and strength while satisfying fire extinguishing properties, whiteness of paper and ash, etc., and has an excellent function of removing harmful substances (especially malodorous substances) derived from sidestream smoke. It has been found that a particularly suitable cigarette paper can be obtained, and the present invention has been completed.

That is, the present invention
(1) For cigarettes containing 15 to 35% by weight of zeolite obtained by making a paper raw material containing a zeolite-pulp composite and pulp in a solid content weight ratio of 70:30 to 30:70 Wrapping paper,
(2) The cigarette paper as described in (1) above, wherein the zeolite-pulp composite pulp is hemp pulp;
(3) The cigarette paper according to (1) or (2), wherein the zeolite-pulp composite is a metal-supported zeolite-pulp composite supporting at least one metal selected from silver, copper and zinc.
(4) The cigarette paper according to any one of (1) to (3), wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 wt% or more of zeolite,
(5) The cigarette paper according to any one of (1) to (3) above, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 to 55% by weight of zeolite,
(6) The cigarette paper according to any one of (1) to (5), wherein the air permeability is 80 ml / min or more and 400 ml / min or less.
(7) After beating the zeolite-pulp composite and the pulp at least the zeolite-pulp composite, both are mixed so that the solid content weight ratio is 70:30 to 30:70, and the mixed pulp is made into paper. A method for producing a cigarette wrapping paper, wherein the paper is finished to a paper having a basis weight of 15 to 55 g / m ² ;
(8) The method for producing a cigarette paper according to (7) above, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22% by weight or more of zeolite, and (9) the zeolite-pulp composite is zeolite. The method for producing a cigarette paper according to the above (7), which is a zeolite-pulp composite containing 22 to 55% by weight.

According to the present invention, especially cigarette paper which has both air permeability effective for reducing the amount of tar and high-speed mechanical suitability (sufficient tensile strength), and is effective in reducing adverse effects on non-smokers caused by sidestream smoke of tobacco. A cigarette paper useful for the above can be obtained.
Further, the cigarette paper of the present invention has an air permeability effective for reducing the amount of tar, and exhibits an appropriate flammability without blending a combustion control agent. A mild tobacco with a feeling can be realized.

Hereinafter, the present invention will be described with reference to preferred embodiments thereof.
The cigarette paper of the present invention is obtained by papermaking a paper raw material containing a zeolite-pulp composite and pulp in a solid weight ratio of 70:30 to 30:70, and 15 to 35% by weight of zeolite. The main feature is that it is contained.

  In the present invention, the “cigarette paper” includes “cigarette paper” that wraps the cut portion of tobacco, “plug roll paper” that wraps the filter portion of tobacco, and “chip paper” that connects the cigarette paper and the plug roll paper. It is a concept to include.

  The “zeolite-pulp composite” in the present invention is an “inorganic having an inorganic porous crystal in the substance of a hydrophilic polymer substrate” proposed by the present applicant in JP-A-11-315492 (Patent Document 5). "Porous crystal-hydrophilic polymer composite", wherein the inorganic porous crystal is zeolite and the hydrophilic polymer substrate is pulp. That is, the “zeolite-pulp composite having zeolite in the pulp substance”. The term “inside of the pulp” as used herein means the inside of the polymer material constituting the pulp, and includes, for example, the cell wall surface of cellulose fibers, the pores present in the cell wall, and the cell lumen (lumen). I can't. The phrase “having zeolite in the pulp entity” means that a part or all of the zeolite is present in the pulp entity.

  The zeolite-pulp composite is produced by reacting a silicon compound and an aluminum compound with a basic substance in a pulp entity in the presence of swollen pulp. The manufacturing method is as described in Patent Document 6, and the details are as follows.

  In the first method (method 1), first, the pulp is impregnated with an aqueous solution of a silicon compound. The impregnation method is not particularly limited, and for example, a method of immersing the pulp in an aqueous solution, spraying the aqueous solution onto the pulp, or coating with various coaters can be used. The silicon compound is not particularly limited as long as it is soluble in water, and examples thereof include sodium metasilicate, potassium metasilicate, potassium orthosilicate, water glass, silica sol, etc., but the solubility in water is high and the crystallinity is high. From the viewpoint of obtaining a zeolite having a high particle size, sodium metasilicate is preferred. The concentration of the aqueous solution of the silicon compound is not particularly limited, but is preferably 1.0 to 100 mmol / l, more preferably 10 to 50 mmol / l.

  Pulp impregnated with an aqueous solution of a silicon compound is preferably controlled by adjusting the amount of the impregnated solution, such as scraping with a blade, squeezing between rolls, or squeezing with a press. Although there is no restriction | limiting in particular in the quantity of the impregnation solution after adjustment, It is preferable to adjust to the range of 1.0-20 times with respect to the dry weight of a pulp. The pulp impregnated with an aqueous solution of a silicon compound may have an impregnation (penetration) time before or after adjusting the amount of the solution so that the solution can sufficiently permeate, and the impregnation time can be appropriately selected from 10 minutes to 2 hours. .

  Next, the pulp in which the amount of the solution has been adjusted is immersed in a mixed aqueous solution of an aluminum compound and a basic substance. Examples of the aluminum compound include sodium aluminate, potassium aluminate, aluminum sulfate, aluminum chloride, and aluminum nitrate. Sodium aluminate is preferable from the viewpoint of obtaining a zeolite having high solubility in water and high crystallinity. The concentration of the aqueous solution of aluminate is not particularly limited, but is preferably 1.0 to 1000 mmol / l, more preferably 10 to 500 mmol / l. Examples of the basic substance include sodium hydroxide and potassium hydroxide. Sodium hydroxide is preferable from the viewpoint of obtaining a zeolite having high solubility in water and high crystallinity. The concentration of the basic substance is 10 to 5000 mmol / l, preferably 100 to 2500 mmol / l because a considerably high alkali concentration is necessary for crystallizing the zeolite. The temperature for immersion is 20 to 90 ° C, preferably 40 to 60 ° C. The immersion time is 2 hours to 20 days, preferably 12 hours to 2 days.

  The mixing ratio (molar ratio) of the silicon compound, the aluminum compound and the basic substance in the presence of the swollen pulp is preferably 1: 1 to 10:10 to 50, more preferably 1: 3 to 5:12. ~ 30. Basic substances are added in excess relative to silicon compounds and aluminum compounds, especially in the case of 4A zeolite, because the zeolite crystals themselves are metastable phases and cannot be synthesized except under excessive alkaline conditions. It is.

  The immersion temperature is in the range of 20 to 90 ° C., the immersion time is 2 hours to 20 days, and the mixing ratio (molar ratio) of the silicon compound, the aluminum compound and the basic substance is 1: 1 to 10:10 to 50 If it is, it can produce | generate a zeolite efficiently in the substance of a pulp.

  As another method for producing a zeolite-pulp composite other than the first method (method 1), the pulp is first impregnated with an aqueous solution of an aluminum compound, and then a mixed aqueous solution of a silicon compound and a basic substance is immersed. You may let them. Further, a mixed aqueous solution of either a silicon compound or an aluminum compound and a basic substance may be impregnated in the pulp first, and then immersed in another remaining aqueous solution. That is, an aqueous solution of a silicon compound and an aluminum compound forms a gel when both are mixed, so that the pulp cannot be impregnated at the same time. For example, three steps of impregnating pulp with an aqueous solution of a basic substance, then impregnating with an aqueous solution of a silicon compound, and finally immersing in an aqueous solution of an aluminum compound may be performed. However, since the zeolite loading of the zeolite-pulp composite produced by these methods is slightly inferior to that of the zeolite-pulp composite produced by the first method (method 1), It is good to manufacture by one method (method 1). Since the first method (method 1) is a very mild synthesis condition compared to general zeolite synthesis conditions, the zeolite can be supported without damaging the pulp.

  By the above-described method, a zeolite-wood pulp composite is obtained when wood pulp is used as the pulp, and a zeolite-hemp pulp composite is obtained when hemp pulp is used as the pulp. In the present invention, such a zeolite-pulp composite is used in a papermaking process together with pulp such as hemp pulp and wood pulp, and is used for cigarettes having a purposeful removal function of sidestream smoke-derived harmful substances (especially malodorous substances). A cigarette paper suitable for wrapping paper, particularly cigarette paper can be obtained. In the present invention, `` hemp pulp '' is a concept that includes flax, cannabis, green hemp, Indian hemp, burlap, burlap, kenaf, sisal hemp, Manila hemp, zile hemp, New Zealand hemp, mother hemp, etc. Flax and cannabis are preferably used.

  In the present invention, the zeolite-pulp composite has a zeolite content of 22 to 55% by weight from the viewpoint of giving the cigarette paper obtained a function capable of sufficiently removing sidestream smoke-derived substances generated during tobacco combustion. What is in the range of 30 to 50% by weight is more preferable. That is, when the zeolite content exceeds 55% by weight, the strength of the fiber itself is lowered, and it cannot withstand the beating treatment that is indispensable for improving the strength of paper (particularly indispensable for improving the strength of cigarette paper). If it is less than 22% by weight, the air permeability and flame retardancy tend not to be satisfied. The zeolite content in the zeolite-pulp composite can be easily adjusted by appropriately changing the concentration of the raw material for producing the zeolite when producing the zeolite-pulp composite.

  In the cigarette paper of the present invention, it is important that the zeolite-pulp composite is contained in a specific amount with respect to the whole raw pulp. That is, the cigarette paper of the present invention can be obtained by making paper using a specific amount of a zeolite-pulp composite as a raw material pulp together with normal pulp. In accordance with JIS P 8221-2 “pulp-pulverization method”, at least the zeolite-pulp composite is beaten (preferably, both the pulp and the zeolite-pulp composite are subjected to a beating process), and the raw material after beating The pulp may be made in accordance with JIS P 8222 “Pulp—Method for preparing handsheets for testing”. In addition, as in the conventional method for producing cigarette paper, a stretching process (densification process) and the like can be performed after the paper making process.

Table 1 below shows the major cigarette paper standards in Japan. As described in the above-mentioned background art section, cigarette paper has various required physical properties such as basis weight, tensile strength, elongation, opacity, whiteness, porosity, burning rate, and self-extinguishing properties. In addition, the basis weight, as described in the background section, in Japan is about 21~22g / ^{m 2,} in the United States 25~26g / ^{m 2} or so, in Europe is about 15~55g / ^{m 2.}

  The inventor is excellent in satisfying the general required physical properties in the cigarette paper by containing 30 to 70% by weight of the zeolite-pulp composite (solid content) with respect to the whole raw pulp (solid content). The present inventors have found that a cigarette paper particularly suitable for cigarette paper that can exhibit a function of removing sidestream smoke-derived harmful substances can be obtained. That is, although it varies depending on the zeolite content of the zeolite-pulp composite, generally, the zeolite-pulp composite (solid content) is used in an amount of 30 to 70% by weight based on the entire raw pulp (solid content) (that is, zeolite -The pulp composite and the pulp are used together in a range in which the solid content weight ratio is 70:30 to 30:70), while containing an amount of zeolite effective for removing harmful substances in sidestream smoke, It has been found that a cigarette paper particularly suitable for cigarette paper having sufficient air permeability and strength can be realized, and the content of the zeolite-pulp composite (solid content) per whole raw pulp (solid content) is Preferably it is 40 to 60% by weight, more preferably 45 to 50% by weight (the solids weight ratio of both the zeolite-pulp composite and the pulp is preferred) 60: 40-40: 60, especially preferably 55: 45 to 45: a 55).. When the content of the zeolite-pulp composite per whole raw pulp (solid content) is less than 30% by weight, the resulting paper shows sufficient strength, but the air permeability is impaired because of high density. On the contrary, when the content of the zeolite-pulp composite exceeds 70% by weight, a sufficient function of removing sidestream smoke-derived harmful substances and air permeability can be obtained, but the strength is lowered.

  The “zeolite-pulp composite” used in the present invention is one in which a part or all of the zeolite is present in the substance of the pulp (inside the polymer material constituting the pulp) by the above-described method. It cannot be obtained by a method of making paper by simply mixing zeolite with the raw material pulp at the time of paper manufacture, or by blending or coating zeolite in the paper making process. Patent Documents 3 and 4 that disclose cigarette paper disclose that zeolite is contained as a porosity reducing agent. Moreover, zeolite is a well-known adsorbent, and it can be predicted to some extent that some adsorption performance is exhibited by incorporating zeolite into cigarette paper. However, as described in Patent Document 4 and Patent Document 5, when zeolite is blended, the porosity (air permeability) of the paper is lowered, so that it is difficult to obtain a paper having a sufficiently high porosity. In addition, a pulp having a specific gravity of about 1 and a zeolite having a specific gravity of about 2.4 are difficult to form a good mixed state, and in order to stably support the zeolite on paper, the zeolite is mixed in a secondary aggregate, It is necessary to use a binder such as polyvinyl alcohol. However, when zeolite is secondarily agglomerated and blended, the pores tend to be blocked by the aggregating agent, and the papermaking wire tends to be clogged. In addition, when a binder is used, the air permeability decreases due to the binder, and the pores of the zeolite are blocked as shown in the comparative examples described later, and therefore harmful substances (especially ammonia, acetic acid, acetaldehyde, etc.) The bad odor substance) is not effectively exerted.

  On the other hand, the present invention can support a sufficient amount of zeolite effective for removing harmful substances in sidestream smoke without using a binder or the like by using a zeolite-pulp composite, The present inventors have found that a cigarette paper particularly suitable for cigarette paper having a high air permeability while ensuring a relatively high strength can be obtained. The zeolite content per paper is not particularly limited, but is preferably about 15 to 35% by weight, more preferably about 20 to 30% by weight. If the zeolite content is less than 15% by weight, the removal performance of harmful substances in the sidestream smoke tends to decrease, and if the zeolite content exceeds 35% by weight, the blending amount of the zeolite-pulp composite increases, This is not preferable because the strength of the resin is reduced. The air permeability is generally 70 ml / min or more, preferably 80 ml / min or more, and more preferably 180 ml / min or more effective for reducing the amount of tar. And while having such a high air permeability, the tensile strength is 8.0 N / 15 mm or more, and preferably a tensile strength of 10.0 N / 15 mm or more is achieved at an air permeability of 180 ml / min or more. obtain. If the air permeability is too high, the amount of air flowing in from the side of the cigarette paper will increase when inhaled, and the cigarette tick may self-extinguish, so the upper limit of air permeability is 400 ml / min or less. Is preferred.

  The reason why a paper having a high porosity and sufficient strength can be obtained without performing a perforating treatment after the paper making process by using a specific amount of zeolite-pulp composite as a raw material pulp as in the present invention. Although it is not clear, normal pulp exhibits a flat shape by pressing, whereas a cross-section of the zeolite-pulp composite is substantially circular when observed with an electron microscope, and the unique shape of the zeolite-pulp composite is aerated. It is thought that it acts on ensuring the safety.

  Generally, the optimum strength of cigarette paper is said to be 8 to 15 N / 15 mm. In the zeolite-pulp composite used in the present invention, the fibers are loosened by the beating process, and the strength is increased by increasing the hydrogen bonds. Therefore, the strength of the obtained paper can be adjusted according to the degree of beating processing in the manufacturing process, and for example, the optimum strength as a cigarette paper of 8 to 15 N / 15 mm can be easily realized. Even if the beating process is performed, the detachment of zeolite from the pulp is slight, and the function of removing sidestream smoke-derived harmful substances does not deteriorate. In addition, it is preferable to use the normal pulp (hemp pulp, wood pulp) used with a zeolite-pulp composite after beating. The degree of the beating treatment of the zeolite-pulp composite is usually beaten to about 150 to 750 ml by a PFI mill (manufactured by Kumagai Riki Kogyo Co., Ltd.) based on JIS P 8221-2 “pulp-pulverization method”. In addition, the degree of the beating treatment of pulp (hemp pulp, wood pulp) is usually based on JIS P 8221-2 “pulp-pulverization method”, PFI mill (manufactured by Kumagaya Riki Kogyo Co., Ltd.) Therefore, it is preferable to beat to about 350 to 750 ml.

  Conventional cigarette paper is usually added with 1 to 3% of sodium citrate as a combustion control agent. However, as is clear from the examples described later, the cigarette paper of the present invention exhibits moderate combustibility without adding a combustion control agent. In addition, the amount of sodium citrate added to conventional cigarette paper is 3% or less, and since it is a small amount, it is not a big problem, but sodium citrate has a considerable effect on the taste of tobacco, so The cigarette paper of the present invention that does not require addition has an advantage of making the taste of tobacco milder, and such advantage is more remarkably exhibited when used as cigarette paper.

  The cigarette paper of the present invention has excellent sidestream smoke-derived harmful substance removal performance, for example, has a function of removing ammonia, acetic acid, acetaldehyde, carbon monoxide, nitrogen compounds and other harmful substances, Particularly excellent removal performance against malodorous substances such as ammonia, acetic acid and acetaldehyde. That is, as can be seen from the comparison of Examples and Comparative Examples described later, the cigarette paper of the present invention is more adsorptive to sidestream smoke-derived harmful substances than paper obtained by making paper by mixing zeolite with raw pulp. Expresses remarkably and exhibits excellent sidestream smoke-derived harmful substance removal performance (particularly, removal performance against malodorous substances such as ammonia, acetic acid, and acetaldehyde). This is because in the zeolite-pulp composite, the zeolite is integrated with the pulp without impairing its function, and it is considered that the very large specific surface area of the zeolite acts effectively.

  In the cigarette paper of the present invention, the zeolite-pulp composite is preferably hemp pulp. That is, it is preferable to use at least a zeolite-hemp pulp composite as the zeolite-pulp composite. By using the zeolite-hemp pulp composite, it works more favorably by improving the strength (particularly tensile strength) of the paper.

  In addition, the framework structure of the zeolite in the zeolite-pulp composite is not particularly limited, and any of X-type, A-type, Y-type, and ZSM-5 may be used, but it is excellent in the adsorption ability of ammonia contained in the sidestream salt. From the viewpoint, the X type and / or the A type are preferable.

  The zeolite-pulp composite is preferably a metal-supported zeolite-pulp composite in which at least one metal selected from silver, copper and zinc is contained in a cation-exchangeable site in the zeolite. By using such a metal-supported zeolite-pulp composite, the resulting paper exhibits a chemisorption effect due to containing a metal, and exhibits better removal performance against sidestream smoke-derived harmful substances. Become.

  The metal-supported zeolite-pulp composite is prepared by the above-described method, and after removing the liquid and washing with water, the zeolite-pulp composite is converted into a metal salt having a catalytic function (metal is silver, copper Or it can obtain by immersing in the aqueous solution of the metal salt which is zinc. Although there is no restriction | limiting in particular in the density | concentration of the aqueous solution of a metal salt, Preferably it is 1.0-100 mmol / l, and there is no restriction | limiting in particular also in the temperature and time to immerse. At this time, since the pulp can permeate the aqueous solution, the metal can be supported on the entire zeolite in the pulp body without waste. The amount of metal supported in the metal-supported composite is preferably about 0.01 to 100 mg / g, and more preferably about 0.1 to 50 mg / g.

  In the cigarette paper of the present invention, in addition to pulp and zeolite-pulp composites, for example, an appropriate amount of a calcium carbonate agent is blended for the purpose of air permeability control, or for the purpose of improving the taste, etc. An appropriate amount of a fragrance such as menthol or eucalyptus may be blended.

In the present invention, the basis weight of the cigarette paper is not particularly limited. For example, if adjusted to the Japanese standard is a 21~22g / ^{m 2} or so, if you adapt to the American standard 25~26g / ^{m 2} or so, if you match the European standard, which is 15~55g / ^{m 2} about.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated in detail, this invention is not limited by the Example described below.

1. Production of zeolite-pulp composite [Production Example 1]
36.8 g of Chilean raha pulp (conifer kraft pulp: NBKP) is weighed in a dry weight (105 ° C.) and put in a polypropylene container. Add liter and stir.
The container was sealed and allowed to stand in an electric dryer set at 90 ° C. for 18 hours. After completion of the reaction, it was washed with 5 liters of water and dehydrated with a small centrifuge.
By this operation, 65 g of zeolite-NBKP composite was obtained by dry weight. By ashing this composite with an electric furnace, it was found that this composite contained 48 wt% X-type zeolite.

[Production Example 2]
36.8 g of Chilean raha pulp (conifer kraft pulp: NBKP) is weighed in a dry weight (105 ° C.) and put in a polypropylene container. .8 liters was added and stirred.
The container was sealed and allowed to stand in an electric dryer set at 90 ° C. for 18 hours. After completion of the reaction, it was washed with 5 liters of water and dehydrated with a small centrifuge.
By this operation, 64 g of a zeolite-NBKP complex was obtained by dry weight. By ashing this composite with an electric furnace, it was found that this composite contained 41 wt% A-type zeolite.

[Production Example 3]
36.8 g of hemp pulp produced in Ecuador was weighed by dry weight (105 ° C.), put into a polypropylene container, 150 g of caustic soda, 80 g of sodium silicate and 57 g of sodium aluminate were added, and 1 liter of water was added and stirred. .
The container was sealed and allowed to stand in an electric dryer set at 90 ° C. for 18 hours. After completion of the reaction, it was washed with 5 liters of water and dehydrated with a small centrifuge.
By this operation, 65 g of zeolite-hemp pulp composite was obtained by dry weight. By ashing this composite with an electric furnace, it was found that this composite contained 52 wt% X-type zeolite.

[Production Example 4]
Weigh 36.8 g of hemp pulp from Ecuador in a dry weight (105 ° C.), put it in a polypropylene container, add 150 g of caustic soda, 40 g of sodium silicate, 57 g of sodium aluminate, add 0.8 liter of water, Stir.
The container was sealed and allowed to stand in an electric dryer set at 90 ° C. for 18 hours. After completion of the reaction, it was washed with 5 liters of water and dehydrated with a small centrifuge.
By this operation, 64 g of a zeolite-hemp pulp composite was obtained by dry weight. By ashing this composite with an electric furnace, it was found that this composite contained 45 wt% A-type zeolite.

[Production Example 5]
10 g of the zeolite-NBKP complex produced in Production Example 1 was weighed and placed in a container containing 300 ml of a copper sulfate pentahydrate aqueous solution prepared at 500 ppm. Stir for minutes. After completion of the reaction, it was dehydrated with a small centrifuge.
By this operation, 10 g of copper-containing X-type zeolite-NBKP composite was obtained by dry weight. As a result of immersing 1 g of this complex in 1N nitric acid to dissolve the copper-containing X-type zeolite and analyzing it with an atomic absorption spectrometer, it was found that this complex contained 45 mg / g of copper.

[Production Example 6]
10 g of the zeolite-hemp pulp complex produced in Production Example 4 was weighed and placed in a container containing 300 ml of an aqueous zinc sulfate / heptahydrate solution prepared to 500 ppm, and a cation exchange reaction was performed at room temperature. Stir for 60 minutes. After completion of the reaction, it was dehydrated with a small centrifuge.
By this operation, 10 g of zinc-containing A-type zeolite-NBKP composite was obtained by dry weight. As a result of immersing 1 g of this complex in 1N nitric acid to dissolve zinc-containing A-type zeolite and analyzing it with an atomic absorption spectrometer, it was found that this complex contained 40 mg / g of zinc.

2. Examples and Comparative Examples [Example 1]
The composites obtained in Production Examples 1 to 6 were beaten up to 195 ml by Canadian Freeness using a PFI mill manufactured by Kumagai Riki Kogyo Co., Ltd. based on JIS P 8221-2 “Pulp-Powder Method”. Further, Laha pulp was beaten in the same manner up to 655 ml.
The composite after the beating treatment was dehydrated so that the solid content was 24.7%, and the raha pulp after the beating treatment was also 18.5% solid content, so that the weight ratio of the composite: raha pulp was 60:40 and 40:60. Weighed so that Table 2 shows the various prescriptions when this raw material is made into paper according to JIS P 8222 “Pulp-Handsheet adjustment method for testing”, which was carried out to obtain paper with a basis weight of 40 g / m ² (25 × 25 cm). . The “mixing ratio” in the table is the weight ratio of the solid content of the main raw material and auxiliary raw material (main raw material: auxiliary raw material), and “main raw material (g)” and “sub raw material (g)” are weights before dehydration. is there.

[Comparative Example 1]
Ecuadorian hemp pulp was beaten up to 195 ml with Canadian Freeness using a PFI mill manufactured by Kumagai Riki Kogyo Co., Ltd. based on JIS P 8221-2 “Pulp-Powder Method”. Further, Laha pulp was beaten in the same manner up to 655 ml.
To add 0.5 g of powdery commercial X-type zeolite, commercial A-type zeolite, and commercial copper-containing X-type zeolite to these raw materials (1 g each in dry weight) to obtain 40 g / m ² of paper (25 × 25 cm) The paper was made according to JIS P 8222 “Pulp-Preparation of handsheets for testing”.

[Comparative Example 2]
Ecuadorian hemp pulp was beaten up to 195 ml with Canadian Freeness using a PFI mill manufactured by Kumagai Riki Kogyo Co., Ltd. based on JIS P 8221-2 “Pulp-Powder Method”. Further, Laha pulp was beaten in the same manner up to 655 ml.
Using these raw materials, paper was made based on JIS P 8222 “Pulp-Preparation of handsheets for testing” to obtain 25 g / m ² of paper. This paper was coated with powdered commercial X-type zeolite, commercial A-type zeolite, and commercial zinc-containing A-type zeolite so as to have a content of 15 g / m ² using a polyvinyl alcohol-based binder.

[Comparative Example 3]
The composite obtained in Production Example 1 was beaten up to 195 ml with Canadian Freeness using a PFI mill manufactured by Kumagai Riki Kogyo based on JIS P 8221-2 “Pulp-Powder Method”. Further, Laha pulp was beaten in the same manner up to 655 ml.
The composite after the beating treatment was dehydrated so that the solid content was 24.7%, and the raha pulp after the beating treatment was 18.5% solid content, so that the weight ratio of the composite: raha pulp was 80:20 and 20:80. Weighed so that Table 3 shows the prescriptions when this raw material is made into a paper of JIS P 8222 “Pulp-Handling method for test handsheet” which was carried out to obtain 40 g / m ² of paper (25 × 25 cm). The “mixing ratio” in the table is the weight ratio of the solid content of the main raw material and auxiliary raw material (main raw material: auxiliary raw material), and “main raw material (g)” and “sub raw material (g)” are weights before dehydration. is there.

[Comparative Example 4]
φ150mm No. No. 5 filter paper 122 g / m ² was added to Sample No. No. 19, and a 1% sodium citrate aqueous solution was added dropwise thereto to form a sheet containing 3% sodium citrate. It was set to 20.

3. Experimental Experiment Example 1 (Zeolite content)
The cigarette papers obtained in Example 1 and Comparative Examples 1 and 2 were incinerated with an electric furnace to determine the zeolite content. The results are shown in Table 4. The “blending ratio” in the table is a weight ratio of the solid content of the main material and the auxiliary material (main material: auxiliary material).

The basis weight of the cigarette paper produced in Example 1 was approximately 40 g / m ² . The yield rate of zeolite in each sample was 95 to 97%, and it was found that the zeolite-pulp composite was contained in the cigarette paper without dropping off the zeolite even after the beating treatment.

In Comparative Example 1, the basis weight was 37.5 g / m ² , which was lower than the theoretical value. The theoretical zeolite content is 20%. 11, no. 12, no. Both 13 were in the 14% range, and the yield rate was about 70%. This was thought to be due to the netting of zeolite during handmade papermaking.

  In Comparative Example 2, the yield was 90 to 95%, which was almost the same as Example 1, due to the effect of using the binder. Also in Comparative Example 3, the operation itself was the same as in Example 1, so the zeolite yield in each sample was about 96%.

Experimental Example 2 (Tensile strength)
Each cigarette paper obtained in Example 1 and Comparative Examples 1, 2, and 3 was determined for a tensile strength of 15 mm in width based on JIS P 8113 “Paper and paperboard—Testing method for tensile properties”. The results are shown in Table 5. The “blending ratio” in the table is a weight ratio of the solid content of the main material and the auxiliary material (main material: auxiliary material).

The cigarette paper manufactured in Example 1 was all 8 N / 15 mm or more. By using hemp pulp as the main raw material, the tensile strength was higher.
The cigarette paper of Comparative Example 1 was found to have sufficient tensile strength. In addition, the tensile strength measurement is to measure the strength when the paper is torn, but it was found that the powder that seems to be zeolite floats in the air.
In the cigarette paper of Comparative Example 2, since the basis weight of the paper itself was only 25 g / m ² , the tensile strength was a low value.
In Comparative Example 3, it was found that the composite: NBKP ratio of 80:20 had such a low strength that it could not withstand production. It was also found that the composite: NBKP ratio of 20:80 shows a considerably high strength.

Experimental example 3 (bad odor adsorption)
Of the samples obtained in Example 1, no. 3, no. 4, no. 9 and no. No. 10 of Comparative Example 1 11, no. 13, No. 2 of Comparative Example 2. 14, no. 16 was made into a 10 × 10 cm piece, and the gas adsorption capacity of 1.5 liters of ammonia gas, acetic acid gas and acetaldehyde gas under room temperature conditions was examined using a detector tube method.

  No. selected from Example 1. 3, No. 4, No. 4, 9 and no. No. 10 showed excellent removal performance with respect to ammonia, acetic acid, and acetaldehyde as compared with the samples of Comparative Examples 1 and 2. In particular, No. containing copper or zinc. 9 and no. No. 10 had excellent ammonia removal performance. Further, in Comparative Example 2, although the zeolite content was large, an effective malodor adsorption ability was not expressed even in the sample containing zinc. This was thought to be because the pores of the zeolite were blocked by the polyvinyl alcohol binder.

Experimental Example 4 (High porosity (air permeability))
Of the samples obtained in Example 1, no. 6 and no. No. 8 of Comparative Example 1 12, No. 2 of Comparative Example 2. 15 and Comparative Example 3 17, no. 18 was made into a small piece of 10 × 10 cm, and the average pore size, the maximum pore size, and the air permeability were measured with a pore distribution measuring device (palm porometer) manufactured by PMI under the condition of 23 ° C.-50% RH.
The results are shown in Table 7.

Experimental Example 5 (Flammability)
Of the samples obtained in Example 1, no. 1 and no. No. 5 of Comparative Example 1 No. 11 of Comparative Example 2 No. 14 of Comparative Example 3 17 and no. No. 18 of Comparative Example 4 19 and No. 20 was made into a strip of 15 mm × 150 mm, a flame test was conducted by a method in which the flame was burned for 1 second using a lighter on a ceramic plate under no wind, and the burning rate at which the whole burned was recorded. The results are shown in Table 7.

No. 1 as a sample of Example 1. 1 and no. In the case of No. 5, the combustion itself was slow and there was no flame.
Sample No. 1 of Comparative Example 1 No. 11 also had a slow combustion and no flames.
Sample No. 2 of Comparative Example 2 No. 14 combustion was slow, and there was no flame. The ash color was a little blackish.
Sample No. 3 of Comparative Example 3 No. 17 burned very slowly and there was no flame.
No. 18 burned with a flame and the burning time was short.
Sample No. 4 of Comparative Example 4 19 burned with flames and the burning time was short.
No. No. 20 burned itself slowly, but the ash was black.

  Conventionally, in cigarette paper, when the mechanical strength such as tensile strength is increased, the air permeability is hindered, and the mechanical strength is lowered if the air permeability is ensured. However, as can be seen from the above examples and test results, the cigarette paper of the present invention has sufficient strength and air permeability in a state containing a sufficient amount of zeolite that functions as a removing agent for malodorous substances in sidestream smoke. (Preferably an air permeability of 180 ml / min or more effective for low tar tobacco), and the flammability can be controlled without using a conventionally added combustion control agent. It has an excellent function and is found to be particularly useful as a cigarette paper.

Claims (9)

  A cigarette wrapping paper containing 15 to 35% by weight of zeolite obtained by papermaking a paper raw material containing a zeolite-pulp composite and pulp in a solid weight ratio of 70:30 to 30:70.   2. The cigarette paper according to claim 1, wherein the pulp of the zeolite-pulp composite is hemp pulp.   The tobacco wrapping paper according to claim 1 or 2, wherein the zeolite-pulp composite is a metal-supported zeolite-pulp composite supporting at least one metal selected from silver, copper and zinc.   The cigarette paper according to any one of claims 1 to 3, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 wt% or more of zeolite.   The cigarette paper according to any one of claims 1 to 3, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 to 55 wt% of zeolite.   The cigarette wrapping paper according to any one of claims 1 to 5, wherein the air permeability is 80 ml / min or more and 400 ml / min or less. After beating the zeolite-pulp composite and the pulp at least the zeolite-pulp composite, both are mixed so that the weight ratio of the solid content is 70:30 to 30:70, and the mixed pulp is made into paper and the basis weight is obtained. A method for producing a cigarette wrapping paper, which is finished into a paper having an amount of 15 to 55 g / m ² .   The method for producing a cigarette paper according to claim 7, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 wt% or more of zeolite.   The method for producing a cigarette paper according to claim 7, wherein the zeolite-pulp composite is a zeolite-pulp composite containing 22 to 55 wt% of zeolite.