WO2013146325A1 - Cigarette wrapping paper which maintains opacity thereof and can reduce amount of carbon monoxide in mainstream smoke - Google Patents

Cigarette wrapping paper which maintains opacity thereof and can reduce amount of carbon monoxide in mainstream smoke Download PDF

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Publication number
WO2013146325A1
WO2013146325A1 PCT/JP2013/057299 JP2013057299W WO2013146325A1 WO 2013146325 A1 WO2013146325 A1 WO 2013146325A1 JP 2013057299 W JP2013057299 W JP 2013057299W WO 2013146325 A1 WO2013146325 A1 WO 2013146325A1
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Prior art keywords
wrapping paper
calcium carbonate
cigarette
shape
paper
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PCT/JP2013/057299
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French (fr)
Japanese (ja)
Inventor
哲哉 吉村
石川　信幸
祐一郎 木戸
拓 日出島
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日本たばこ産業株式会社
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Publication of WO2013146325A1 publication Critical patent/WO2013146325A1/en

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the present invention relates to cigarette wrapping paper, and more specifically to cigarette wrapping paper that maintains opacity and reduces the amount of carbon monoxide in mainstream smoke.
  • a low basis weight cigarette wrapping paper can reduce the amount of carbon monoxide in mainstream smoke, but it is not preferable in appearance because the cigarette wrap with reduced opacity of the cigarette wrapping paper is easy to see through.
  • the basis weight of the cigarette paper is increased to increase the opacity, the amount of carbon monoxide in the mainstream smoke increases.
  • a filler such as calcium carbonate is added to the paper raw material.
  • Patent Document 2 uses a calcium carbonate acicular entangled body in which acicular primary particles of calcium carbonate are irregularly entangled three-dimensionally for the purpose of improving opacity and air permeability. It is disclosed that it is contained in a paper wrapper.
  • the needle-shaped entangled body of calcium carbonate has an internal void with an average pore diameter ranging from 0.5 ⁇ m to 1.25 ⁇ m, and the needle-shaped primary particles of calcium carbonate have an aspect ratio of 10 to 50
  • Patent Document 2 relates to a cigarette paper containing the calcium carbonate.
  • an object of the present invention is to provide a cigarette paper that has a low basis weight but maintains opacity and reduces the amount of carbon monoxide in mainstream smoke.
  • the inventors of the present invention added a specific calcium carbonate whose secondary particles have a squid shape to a paper raw material to create a low basis weight paper, which increases opacity compared to the case of using other calcium carbonate, And it discovered that the amount of carbon monoxide in mainstream smoke decreased, and came to complete this invention.
  • the present invention is characterized by containing 10 to 40% by weight of calcium carbonate having a basis weight of 14 g / m 2 or more and less than 40 g / m 2 and secondary particles having a squid shape.
  • a cigarette paper is provided.
  • the primary particles of calcium carbonate have a columnar shape or a needle shape.
  • the primary particles of calcium carbonate have an average aspect ratio of 4 or more and less than 10.
  • the cigarette wrapping paper of the present invention contains predetermined calcium carbonate as a filler, thereby maintaining opacity despite a low basis weight and reducing the amount of carbon monoxide in mainstream smoke. Moreover, since the cigarette paper of the present invention has a low basis weight and can reduce the amount of carbon monoxide in the mainstream smoke, it is used as a base paper of a low fire spread cigarette paper with a combustion inhibitor applied to the surface. Is also useful.
  • FIG. 1 is a diagram schematically illustrating an example of secondary particles having a squid shape.
  • FIG. 2 is a diagram schematically showing examples of needle-like and columnar primary particles.
  • the cigarette wrapping paper of the present invention contains 10 to 40% by weight of calcium carbonate having a basis weight of 14 g / m 2 or more and less than 40 g / m 2 and secondary particles having a iga shape.
  • the pulp fibers used in the cigarette wrapping paper of the present invention can be composed of flax pulp fibers, wood pulp fibers (hardwood pulp, conifer pulp), etc. used in ordinary cigarette wrapping paper.
  • calcium carbonate whose secondary particles have a iga shape is 10 to 40% by weight, preferably 10 to 35% by weight, more preferably 20%, based on the total basis weight of the wrapping paper. It is blended at a ratio of ⁇ 35% by weight. That is, in the cigarette wrapping paper of the present invention, calcium carbonate whose secondary particles have iga shape is 1.9 to 7.4 g / m 2 , preferably 1.9 to 6.5 g / m 2 , more preferably, to the pulp fiber. Is blended in an amount of 3.7 to 6.5 g / m 2 .
  • Calcium carbonate is contained in the form of particles, and the particle size can be appropriately selected from the viewpoints of cost and ease of papermaking, but is preferably 0.02 ⁇ m to 10 ⁇ m.
  • the content of calcium carbonate means the amount of calcium carbonate contained in the cigarette paper after production.
  • the amount of calcium carbonate in the cigarette paper can be determined by ash measurement or by quantifying calcium ions after extraction as described in the Examples below.
  • the calcium carbonate used in the present invention is a synthetic calcium carbonate synthesized by a chemical reaction, and the shape and size of the primary particles of the synthetic calcium carbonate are roughly uniform and uniform.
  • “primary particles” mean basic particles constituting powders immediately after being synthesized by chemical reaction, and “secondary particles” are aggregates formed by agglomeration of many primary particles. Means.
  • the secondary particles of calcium carbonate having a squid shape are formed by agglomeration of primary particles in a general papermaking process.
  • the “Iga shape” represents an agglomerated shape in which tens to thousands of primary particles having a columnar shape or a needle shape are entangled in three dimensions.
  • Specific examples of the “Iga shape” include the modes disclosed in JP-A-55-40849 and JP-A-59-94700.
  • An example of the “bit shape” is schematically shown in FIG.
  • the iga shape has a core at the center, and a large number of primary particles may protrude from the core, or may not have a core at the center.
  • As calcium carbonate in which the secondary particles have a iga shape for example, Callite SA (Shiraishi Kogyo Co., Ltd.) or igagri calcium carbonate (New Lime Co., Ltd.) can be used.
  • the calcium carbonate may be added to the pulp fiber in the form of primary particles, may be added to the pulp fiber in the form of secondary particles, or the pulp fiber as a mixture of the form of primary particles and the form of secondary particles. May be added. In either case, the calcium carbonate is in a iga shape in the cigarette paper.
  • the shape and size of the primary particles that are preferable for forming secondary shapes of the secondary particles will be described below.
  • the primary particles preferably have a columnar shape or a needle shape.
  • a typical shape of a columnar shape or a needle shape is schematically shown in FIG.
  • the primary particles shown in FIG. 2 have a shape elongated in one direction.
  • the elongation direction of the particles is the longitudinal direction, and the maximum value in the longitudinal direction is “length (L)”.
  • the direction orthogonal to the vertical direction is defined as the width direction, and the maximum value in the width direction is defined as “width (W)”.
  • the ratio of “length (L)” to “width (W)” of primary particles is referred to as an aspect ratio.
  • the ratio (aspect ratio) of the length (L) to the width (W) of the columnar or needle-like primary particles is preferably 4 or more and less than 10.
  • both the columnar particles and the acicular particles refer to particles having an aspect ratio of 4 or more (see FIG. 2).
  • the columnar shape and the needle shape can be distinguished by whether or not the primary particles observed with an electron microscope have a pointed shape. That is, the columnar shape does not have a pointed shape (see FIGS. 1C and 1D), and the needle shape has a pointed shape (FIGS. 1A and 1D). (See (b)).
  • the needle shape may have a pointed shape at both ends in the direction of particle extension or at one end.
  • the columnar shape includes a truncated cone shape in addition to a cylindrical shape.
  • the width (W) and length (L) of the primary particles can be measured using, for example, a scanning electron microscope.
  • the calcium carbonate is preferably such that the primary particles are columnar or needle-like, more preferably the average aspect ratio of the primary particles is in the range of 4 or more and less than 10, and the average length of the primary particles (L ) Is 0.1 to 1.5 ⁇ m.
  • the average aspect ratio is determined by selecting a plurality of representative particles (at least 50 particles, for example, 50 to 200 particles) and measuring the primary particle width (W) and length (L) for each particle. It can be obtained by obtaining the average value of these aspect ratios.
  • a plurality of representative particles at least 50, for example, 50 to 200 particles
  • the length (L) is measured for each particle, and the average of these lengths (L) is measured. It can be obtained by determining the value.
  • the cigarette paper of the present invention has a basis weight of 14 g / m 2 or more and less than 40 g / m 2 .
  • the basis weight of the cigarette paper is preferably 20 g / m 2 or more and less than 40 g / m 2 , more preferably 20 to 30 g / m 2 .
  • the cigarette wrapping paper of the present invention has a smaller pore volume than the papers of Patent Documents 1 and 2 cited as prior art documents.
  • the cigarette paper of the present invention preferably has a pore volume measured by a mercury intrusion porosimeter of 1.0 to 1.8 ml / g.
  • the density of the cigarette paper is preferably 0.4 to 1.0 g / cm 3 .
  • the use of a predetermined calcium carbonate whose secondary particles have a squid shape as a filler increases the pore volume of the wrapping paper, thereby increasing the opacity of the wrapping paper and changing the combustion characteristics of the wrapping paper. Therefore, it is estimated that the amount of carbon monoxide in mainstream smoke could be reduced.
  • the cigarette paper of the present invention may contain a combustion regulator.
  • a combustion control agent alkali metal citrate is preferably used, and potassium citrate and sodium citrate are particularly preferable, and these can be used alone or in combination.
  • the combustion regulator is preferably contained in the cigarette wrapping paper in an amount of 5.0% by weight or less, and contained in an amount of 1.5% by weight or less. Is more preferable.
  • the cigarette paper of the present invention can be used as a cigarette paper with a filter. That is, according to one aspect of the present invention, a cigarette rod including a cigarette wound in a rod shape by the cigarette wrapping paper of the present invention, and a filter coaxially connected to one end of the cigarette rod by tip paper. A cigarette containing is provided.
  • the cigarette wrapping paper of the present invention may be coated with a combustion inhibitor on its surface. That is, the cigarette wrapping paper of the present invention can also be used as a base wrapping paper for low fire spread cigarette wrapping paper.
  • the combustion inhibitor any substance that is known to impart low fire spreading properties to cigarette wrapping paper can be used. For example, pectin, alginate, or the like can be used.
  • the combustion inhibitor can be applied to one surface of the base wrapping paper according to a known method. The combustion inhibitor may be applied to the entire area of one surface of the base wrapping paper, or may be applied as a plurality of band-shaped regions provided on one surface of the base wrapping paper so as to be separated from each other.
  • cigarette wrapping paper with a combustion inhibitor applied to the surface increases the amount of carbon monoxide in mainstream smoke as compared to cigarette wrapping paper not coated.
  • the cigarette wrapping paper of the present invention has a low basis weight and an excellent carbon monoxide reduction effect, the amount of carbon monoxide in mainstream smoke can be reduced by applying a combustion inhibitor compared to before application. Although it increases, it is expected to suppress the formation of carbon monoxide.
  • Examples 1-8 The trade names (purchasers) of calcium carbonate used in Examples 1 to 8 are as follows.
  • Example 1 PCX-850 (Shiroishi Industrial Co., Ltd.)
  • Example 2 Spherical calcium carbonate (New Lime Co., Ltd.)
  • Example 3 Ultrapaque (Specialty Minerals Incorporated)
  • Example 4 Hexagonal calcium carbonate (New Lime Corporation)
  • Example 5 Acicular calcium carbonate (New Lime Corporation)
  • Example 6 UNICA (Yonesho Lime Industry Co., Ltd.)
  • Example 7 Crossed disk-like calcium carbonate (New Lime Corporation)
  • Example 8 Callite SA (Shiroishi Industrial Co., Ltd.)
  • the calcium carbonates of Examples 1 to 7 may form secondary particles in the wrapping paper, but they do not become squid.
  • the calcium carbonate of Example 8 forms iga-shaped secondary particles in the wrapper.
  • Pulp (flax) was beaten to 130 CSF by the Canadian freeness method, and the calcium carbonate was added to the beaten pulp so as to have the content shown in Table 1.
  • a wrapping paper was prepared from the obtained paper stock using a long-net type tubular paper machine. This wrapping paper was harmonized for two days or more under conditions of a temperature of 22 ° C. and a relative humidity of 60%, and was cut into a predetermined length.
  • the amount of calcium carbonate in the wrapping paper is obtained by performing ultrasonic extraction with a 0.3N hydrochloric acid aqueous solution for 30 minutes, then quantifying it as calcium ions with an Agilent capillary electrophoresis system (7100) and converting it to calcium carbonate. Asked.
  • the opacity of the web was measured with Murakami Color Research Laboratory COLORIMETER (CM-53D).
  • Cigarettes were produced using the obtained wrapping paper and cigarette chopping (American blend). A filter was attached to one end of a cigarette rod composed of wrapping paper and cigarette cuts using chip paper, and a cigarette was produced by handmade so that the cigarette circumference was 24.9 mm and the cigarette length was 57 mm. The filling amount of cigarettes was 0.610 g per cigarette.
  • the amount of carbon monoxide in mainstream smoke was measured using Micro-GC (3000A) manufactured by Agi1ent.
  • the amount of carbon monoxide produced per smoke absorption (puff) was measured by the Health Canada inspection method (55 ml / 2s).
  • Table 1 shows the opacity of the wrapping paper and the amount of carbon monoxide produced per smoke absorption (puff).
  • the wrapping papers of Examples 1 to 8 containing various calcium carbonates as fillers have the same basis weight and filler content, so the combustion characteristics do not change and the amount of carbon monoxide in mainstream smoke is also equivalent. Actually, however, there was a difference in the amount of carbon monoxide in mainstream smoke due to the difference in the shape of calcium carbonate. In particular, when calcium carbonate whose secondary particles have a iga shape is used, the amount of carbon monoxide in mainstream smoke is reduced compared to the case of spindle-shaped calcium carbonate used in general cigarette paper. did.
  • the wrapping paper (Example 8) containing calcium carbonate whose secondary particles have a iga shape is compared with the wrapping paper (Example 1) containing spindle-shaped calcium carbonate used in general cigarette wrapping paper. Then, the amount of carbon monoxide produced in the mainstream smoke can be further reduced while having the same high opacity.
  • the wrapping papers of Examples 9 to 14 were prepared in the same manner as described above except that the basis weight and calcium carbonate content of the wrapping paper were changed as shown in Table 2 below.
  • the opacity of the web is shown in Table 2 below.
  • the opacity of the wrapping paper tends to increase as the basis weight and the amount of calcium carbonate increase. This is thought to be due to the change in the degree of voids inside and between the fibers due to the increase in the amount of pulp and calcium carbonate, and the optical interface increases, and the same tendency is observed regardless of the shape of calcium carbonate. Indicated.
  • the wrapping papers of Examples 15 to 18 were prepared in the same manner as described above except that the basis weight and calcium carbonate content of the wrapping paper were changed as shown in Table 3 below.
  • a cigarette was produced using the prepared wrapping paper in the same manner as in the example described above.
  • Table 3 below shows the opacity of the wrapping paper and the amount of carbon monoxide produced per smoke absorption (puff).
  • the wrapping paper blended with calcium carbonate whose secondary particles have a squid shape has carbon dioxide in mainstream smoke while having the same high opacity compared to the wrapping paper blended with spindle-shaped calcium carbonate.
  • the amount produced can be further reduced.

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  • Inorganic Chemistry (AREA)
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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Cigarette wrapping paper characterized by having a measured weight of 14 g/m2 or more and less than 40 g/m2 and containing calcium carbonate of which a secondary particle has a bur-like shape at a content of 10 to 40 wt%.

Description

不透明度を維持し主流煙中一酸化炭素量を減少させるシガレット巻紙Cigarette paper that maintains opacity and reduces the amount of carbon monoxide in mainstream smoke
　本発明は、シガレット巻紙に係り、より具体的には、不透明度を維持し主流煙中一酸化炭素量を減少させるシガレット巻紙に関する。 The present invention relates to cigarette wrapping paper, and more specifically to cigarette wrapping paper that maintains opacity and reduces the amount of carbon monoxide in mainstream smoke.
　低坪量のシガレット巻紙は、主流煙中の一酸化炭素量を低減することが可能であるが、シガレット巻紙の不透明度が下がりたばこ刻みが透けて見えやすいため、外観上好ましくない。一方、不透明度を高めるためにシガレット巻紙の坪量を上げると、主流煙中の一酸化炭素量が増大する。このように、シガレット巻紙は、巻紙として十分な不透明度を維持しながら主流煙中の一酸化炭素量を低減させることが難しい。 A low basis weight cigarette wrapping paper can reduce the amount of carbon monoxide in mainstream smoke, but it is not preferable in appearance because the cigarette wrap with reduced opacity of the cigarette wrapping paper is easy to see through. On the other hand, when the basis weight of the cigarette paper is increased to increase the opacity, the amount of carbon monoxide in the mainstream smoke increases. Thus, it is difficult for cigarette wrapping paper to reduce the amount of carbon monoxide in mainstream smoke while maintaining sufficient opacity as the wrapping paper.
　一般に、シガレット巻紙の不透明度を向上させるために、炭酸カルシウムなどの填料を紙原料に添加する。 Generally, in order to improve the opacity of cigarette paper, a filler such as calcium carbonate is added to the paper raw material.
　特許文献１は、紙の剛度および不透明度を向上させるために、填料として、二次粒子がイガ状の形態である炭酸カルシウムをパルプに添加することを開示する。具体的には、特許文献１は、下記炭酸カルシウム（i）および（ii）の少なくとも１種をパルプに添加することを開示する：（i）平均粒径０．５～６．５μｍの中核体から突出する１００～４０００本の突起を有し、該突起の平均直径Ｄが０．０８～０．２０μｍであり、且つその長さＬが０．２５～２．０μｍであり、Ｌ／Ｄが３～１０の範囲内にある炭酸カルシウム、および（ii）電子顕微鏡観察による平均寸法が長さＬ＝０．５～１０μｍ、幅Ｗ＝０．０５～２．０μｍ、アスペクト比（Ｌ／Ｗ）＝１０～５０である針状一次粒子が三次元的に不規則に絡み合って形成されており、水銀圧入法ポロシメーターによる空隙容積１．８～３．３ｍｌ／ｇおよび吸油量５０～１００ｍｌ／１００ｇを有する炭酸カルシウム。 Patent Document 1 discloses that calcium carbonate whose secondary particles are in a crusty form is added to pulp as a filler in order to improve the rigidity and opacity of paper. Specifically, Patent Document 1 discloses that at least one of the following calcium carbonates (i) and (ii) is added to the pulp: (i) a core having an average particle size of 0.5 to 6.5 μm 100 to 4000 protrusions protruding from the surface, the average diameter D of the protrusions is 0.08 to 0.20 μm, the length L thereof is 0.25 to 2.0 μm, and L / D is Calcium carbonate in the range of 3-10, and (ii) the average dimension by electron microscope observation is length L = 0.5-10 μm, width W = 0.05-2.0 μm, aspect ratio (L / W) = 10 to 50 needle-like primary particles are formed to be irregularly entangled three-dimensionally, and a void volume of 1.8 to 3.3 ml / g and an oil absorption of 50 to 100 ml / 100 g by a mercury intrusion method porosimeter are obtained. Having calcium carbonate.
　また、特許文献２は、不透明度および通気度を向上させることを目的として、炭酸カルシウムの針状一次粒子が三次元的に不規則に絡み合って形成された炭酸カルシウムの針状絡合体をたばこ用巻紙に含有させることを開示する。特許文献２は、炭酸カルシウムの針状絡合体は、平均孔径が０．５μｍから１．２５μｍの範囲の内部空隙を有すること、および炭酸カルシウムの針状一次粒子は、アスペクト比が１０～５０であることを開示し、特許文献２は、上記炭酸カルシウムを含むたばこ用巻紙に関するものである。 In addition, Patent Document 2 uses a calcium carbonate acicular entangled body in which acicular primary particles of calcium carbonate are irregularly entangled three-dimensionally for the purpose of improving opacity and air permeability. It is disclosed that it is contained in a paper wrapper. In Patent Document 2, the needle-shaped entangled body of calcium carbonate has an internal void with an average pore diameter ranging from 0.5 μm to 1.25 μm, and the needle-shaped primary particles of calcium carbonate have an aspect ratio of 10 to 50 In other words, Patent Document 2 relates to a cigarette paper containing the calcium carbonate.
特開昭５５－４０８４９号公報Japanese Patent Laid-Open No. 55-40849 特開昭５９－９４７００号公報JP 59-94700 A
　上述のとおり、シガレット巻紙は、巻紙として十分な不透明度を維持しながら主流煙中の一酸化炭素量を低減させることが難しい。かかる事情に鑑み、本発明は、低い坪量を有するが不透明度を維持し、かつ主流煙中の一酸化炭素量を減少させるシガレット巻紙を提供することを目的とする。 As described above, it is difficult for cigarette wrapping paper to reduce the amount of carbon monoxide in mainstream smoke while maintaining sufficient opacity as the wrapping paper. In view of such circumstances, an object of the present invention is to provide a cigarette paper that has a low basis weight but maintains opacity and reduces the amount of carbon monoxide in mainstream smoke.
　本発明者らは、二次粒子がイガ形状を有する特定の炭酸カルシウムを紙原料に添加して低坪量の紙を作成すると、他の炭酸カルシウムを使用した場合と比べて不透明度を高め、かつ主流煙中の一酸化炭素量が減少することを見出し、本発明を完成させるに至った。 The inventors of the present invention added a specific calcium carbonate whose secondary particles have a squid shape to a paper raw material to create a low basis weight paper, which increases opacity compared to the case of using other calcium carbonate, And it discovered that the amount of carbon monoxide in mainstream smoke decreased, and came to complete this invention.
　すなわち、本発明は、１４ｇ／ｍ2以上４０ｇ／ｍ2未満の坪量を有し、二次粒子がイガ形状を有する炭酸カルシウムが、１０～４０重量％の割合で含有されていることを特徴とするシガレット巻紙を提供する。好ましくは、前記炭酸カルシウムの一次粒子は柱状もしくは針状の形状を有する。好ましくは、前記炭酸カルシウムの一次粒子は４以上１０未満の平均アスペクト比を有する。 That is, the present invention is characterized by containing 10 to 40% by weight of calcium carbonate having a basis weight of 14 g / m 2 or more and less than 40 g / m 2 and secondary particles having a squid shape. A cigarette paper is provided. Preferably, the primary particles of calcium carbonate have a columnar shape or a needle shape. Preferably, the primary particles of calcium carbonate have an average aspect ratio of 4 or more and less than 10.
　本発明のシガレット巻紙は、填料として所定の炭酸カルシウムを含有することにより、低い坪量であるにもかかわらず不透明度を維持し、かつ主流煙中の一酸化炭素量を減少させることができる。また、本発明のシガレット巻紙は、低い坪量を有し、主流煙中の一酸化炭素量を減少させることができるため、表面に燃焼抑制剤が塗布された低延焼性シガレット巻紙のベース巻紙としても有用である。 The cigarette wrapping paper of the present invention contains predetermined calcium carbonate as a filler, thereby maintaining opacity despite a low basis weight and reducing the amount of carbon monoxide in mainstream smoke. Moreover, since the cigarette paper of the present invention has a low basis weight and can reduce the amount of carbon monoxide in the mainstream smoke, it is used as a base paper of a low fire spread cigarette paper with a combustion inhibitor applied to the surface. Is also useful.
図１は、イガ形状を有する二次粒子の一例を模式的に示す図である。FIG. 1 is a diagram schematically illustrating an example of secondary particles having a squid shape. 図２は、針状および柱状一次粒子の例を模式的に示す図である。FIG. 2 is a diagram schematically showing examples of needle-like and columnar primary particles.
　以下、本発明をより詳細に説明する。 Hereinafter, the present invention will be described in more detail.
　本発明のシガレット巻紙は、１４ｇ／ｍ2以上４０ｇ／ｍ2未満の坪量を有し、二次粒子がイガ形状を有する炭酸カルシウムが、１０～４０重量％の割合で含有されている。 The cigarette wrapping paper of the present invention contains 10 to 40% by weight of calcium carbonate having a basis weight of 14 g / m 2 or more and less than 40 g / m 2 and secondary particles having a iga shape.
　本発明のシガレット巻紙に用いられるパルプ繊維は、通常のシガレット巻紙に使用されている亜麻パルプ繊維、木材パルプ繊維（広葉樹パルプ、針葉樹パルプ）等から構成することができる。 The pulp fibers used in the cigarette wrapping paper of the present invention can be composed of flax pulp fibers, wood pulp fibers (hardwood pulp, conifer pulp), etc. used in ordinary cigarette wrapping paper.
　本発明のシガレット巻紙は、二次粒子がイガ形状を有する炭酸カルシウムを、上記パルプ繊維に、巻紙の総坪量に対して１０～４０重量％、好ましくは１０～３５重量％、より好ましくは２０～３５重量％の割合で配合したものである。すなわち、本発明のシガレット巻紙は、二次粒子がイガ形状を有する炭酸カルシウムを上記パルプ繊維に１．９～７．４ｇ／ｍ2、好ましくは１．９～６．５ｇ／ｍ2、より好ましくは３．７～６．５ｇ／ｍ2の量で配合したものである。炭酸カルシウムは、粒子の形態で含有され、その粒径は、コスト、抄紙のしやすさの観点から適宜選ぶことができるが、０．０２μｍ～１０μｍであることが好ましい。本明細書において炭酸カルシウムの含有量は、製造後のシガレット巻紙に含有される炭酸カルシウム量を意味する。シガレット巻紙中の炭酸カルシウム量は、灰分測定により、もしくは、後述の実施例に記載されるとおり、抽出後、カルシウムイオンを定量することにより求めることができる。 In the cigarette wrapping paper of the present invention, calcium carbonate whose secondary particles have a iga shape is 10 to 40% by weight, preferably 10 to 35% by weight, more preferably 20%, based on the total basis weight of the wrapping paper. It is blended at a ratio of ˜35% by weight. That is, in the cigarette wrapping paper of the present invention, calcium carbonate whose secondary particles have iga shape is 1.9 to 7.4 g / m 2 , preferably 1.9 to 6.5 g / m 2 , more preferably, to the pulp fiber. Is blended in an amount of 3.7 to 6.5 g / m 2 . Calcium carbonate is contained in the form of particles, and the particle size can be appropriately selected from the viewpoints of cost and ease of papermaking, but is preferably 0.02 μm to 10 μm. In the present specification, the content of calcium carbonate means the amount of calcium carbonate contained in the cigarette paper after production. The amount of calcium carbonate in the cigarette paper can be determined by ash measurement or by quantifying calcium ions after extraction as described in the Examples below.
　本発明で用いられる炭酸カルシウムは、化学反応により合成される合成炭酸カルシウムであり、合成炭酸カルシウムの一次粒子の形状およびサイズは、おおよそ揃っており均質である。本明細書において、「一次粒子」は、化学反応により合成された直後の粉体を構成する基本粒子を意味し、「二次粒子」は、多数の一次粒子が凝集して形成された集合体を意味する。 The calcium carbonate used in the present invention is a synthetic calcium carbonate synthesized by a chemical reaction, and the shape and size of the primary particles of the synthetic calcium carbonate are roughly uniform and uniform. In this specification, “primary particles” mean basic particles constituting powders immediately after being synthesized by chemical reaction, and “secondary particles” are aggregates formed by agglomeration of many primary particles. Means.
　イガ形状を有する炭酸カルシウムの二次粒子は、一般的な抄紙の工程で一次粒子が凝集することにより形成される。ここで、「イガ形状」とは数十～数千の柱状または針状の形状を持つ一次粒子が三次元に絡み合った凝集形状を表す。「イガ形状」の具体例として、特開昭５５－４０８４９、特開昭５９－９４７００に示される態様が挙げられる。「イガ形状」の一例を模式的に図１に示す。イガ形状は、中心に中核体を有し、中核体から多数の一次粒子が突出していてもよいし、中心に中核体を有していなくてもよい。二次粒子がイガ形状を有する炭酸カルシウムとして、たとえば、カルライトＳＡ（白石工業株式会社）、イガグリ状炭酸カルシウム（ニューライム株式会社）を使用することができる。 The secondary particles of calcium carbonate having a squid shape are formed by agglomeration of primary particles in a general papermaking process. Here, the “Iga shape” represents an agglomerated shape in which tens to thousands of primary particles having a columnar shape or a needle shape are entangled in three dimensions. Specific examples of the “Iga shape” include the modes disclosed in JP-A-55-40849 and JP-A-59-94700. An example of the “bit shape” is schematically shown in FIG. The iga shape has a core at the center, and a large number of primary particles may protrude from the core, or may not have a core at the center. As calcium carbonate in which the secondary particles have a iga shape, for example, Callite SA (Shiraishi Kogyo Co., Ltd.) or igagri calcium carbonate (New Lime Co., Ltd.) can be used.
　炭酸カルシウムは、一次粒子の形態でパルプ繊維に添加されてもよいし、二次粒子の形態でパルプ繊維に添加されてもよいし、一次粒子の形態と二次粒子の形態の混合物としてパルプ繊維に添加されてもよい。いずれの場合も、炭酸カルシウムは、シガレット巻紙中でイガ形状となる。 The calcium carbonate may be added to the pulp fiber in the form of primary particles, may be added to the pulp fiber in the form of secondary particles, or the pulp fiber as a mixture of the form of primary particles and the form of secondary particles. May be added. In either case, the calcium carbonate is in a iga shape in the cigarette paper.
　二次粒子がイガ形状を形成するために好ましい一次粒子の形状およびサイズについて以下に説明する。一次粒子は、柱状形状もしくは針状形状を有することが好ましい。 The shape and size of the primary particles that are preferable for forming secondary shapes of the secondary particles will be described below. The primary particles preferably have a columnar shape or a needle shape.
　柱状形状もしくは針状形状の代表的な形状を模式的に図２に示す。図２に示される一次粒子は、一方向に伸長した形状を有する。粒子の伸長方向を縦方向とし、縦方向の最大値を「長さ（Ｌ）」とする。縦方向に直交する向きを幅方向とし、幅方向の最大値を「幅（Ｗ）」とする。一次粒子の「幅（Ｗ）」に対する「長さ（Ｌ）」の比をアスペクト比という。柱状もしくは針状一次粒子の幅（Ｗ）に対する長さ（Ｌ）の比（アスペクト比）は、４以上１０未満であることが好ましい。ここで、柱状粒子および針状粒子とは、いずれも、アスペクト比が４以上の粒子を指す（図２参照）。柱状と針状は、電子顕微鏡で観察した一次粒子が、先がとがった形状を有するか否かにより区別することができる。すなわち、柱状は、先がとがった形状を有しておらず（図１(ｃ)および(ｄ)参照）、針状は、先がとがった形状を有している（図１(ａ)および（ｂ）参照）。針状は、とがった形状を、粒子の伸長方向の両端に有していてもよいし、一端に有していてもよい。柱状は、円柱の形状に加えて円錐台の形状も含む。 A typical shape of a columnar shape or a needle shape is schematically shown in FIG. The primary particles shown in FIG. 2 have a shape elongated in one direction. The elongation direction of the particles is the longitudinal direction, and the maximum value in the longitudinal direction is “length (L)”. The direction orthogonal to the vertical direction is defined as the width direction, and the maximum value in the width direction is defined as “width (W)”. The ratio of “length (L)” to “width (W)” of primary particles is referred to as an aspect ratio. The ratio (aspect ratio) of the length (L) to the width (W) of the columnar or needle-like primary particles is preferably 4 or more and less than 10. Here, both the columnar particles and the acicular particles refer to particles having an aspect ratio of 4 or more (see FIG. 2). The columnar shape and the needle shape can be distinguished by whether or not the primary particles observed with an electron microscope have a pointed shape. That is, the columnar shape does not have a pointed shape (see FIGS. 1C and 1D), and the needle shape has a pointed shape (FIGS. 1A and 1D). (See (b)). The needle shape may have a pointed shape at both ends in the direction of particle extension or at one end. The columnar shape includes a truncated cone shape in addition to a cylindrical shape.
　一次粒子の幅（Ｗ）および長さ（Ｌ）は、例えば走査型電子顕微鏡を用いて測定することができる。 The width (W) and length (L) of the primary particles can be measured using, for example, a scanning electron microscope.
　本発明において炭酸カルシウムは、好ましくは、その一次粒子が柱状または針状であり、更に好ましくは、一次粒子の平均アスペクト比が４以上１０未満の範囲にあり、且つ一次粒子の平均長さ（Ｌ）が０．１～１．５μｍである。 In the present invention, the calcium carbonate is preferably such that the primary particles are columnar or needle-like, more preferably the average aspect ratio of the primary particles is in the range of 4 or more and less than 10, and the average length of the primary particles (L ) Is 0.1 to 1.5 μm.
　平均アスペクト比は、代表的な複数（少なくとも５０個、たとえば５０～２００個）の粒子を選抜して、各粒子について一次粒子の幅（Ｗ）および長さ（Ｌ）を測定してアスペクト比を求め、これらアスペクト比の平均値を求めることにより得ることができる。平均長さ（Ｌ）も、代表的な複数（少なくとも５０個、たとえば５０～２００個）の粒子を選抜して、各粒子について長さ（Ｌ）を測定し、これら長さ（Ｌ）の平均値を求めることにより得ることができる。 The average aspect ratio is determined by selecting a plurality of representative particles (at least 50 particles, for example, 50 to 200 particles) and measuring the primary particle width (W) and length (L) for each particle. It can be obtained by obtaining the average value of these aspect ratios. As for the average length (L), a plurality of representative particles (at least 50, for example, 50 to 200 particles) are selected, the length (L) is measured for each particle, and the average of these lengths (L) is measured. It can be obtained by determining the value.
　本発明のシガレット巻紙は、１４ｇ／ｍ2以上４０ｇ／ｍ2未満の坪量を有する。シガレット巻紙の坪量は、好ましくは２０ｇ／ｍ2以上４０ｇ／ｍ2未満、より好ましくは２０～３０ｇ／ｍ2である。本発明のシガレット巻紙は、先行技術文献として挙げた特許文献１および２の紙と比較して細孔容積が小さい。本発明のシガレット巻紙は、水銀圧入ポロシメーターで測定される細孔容積が、好ましくは１．０～１．８ｍｌ／ｇである。また、シガレット巻紙の密度は、好ましくは０．４～１．０ｇ／ｃｍ3である。 The cigarette paper of the present invention has a basis weight of 14 g / m 2 or more and less than 40 g / m 2 . The basis weight of the cigarette paper is preferably 20 g / m 2 or more and less than 40 g / m 2 , more preferably 20 to 30 g / m 2 . The cigarette wrapping paper of the present invention has a smaller pore volume than the papers of Patent Documents 1 and 2 cited as prior art documents. The cigarette paper of the present invention preferably has a pore volume measured by a mercury intrusion porosimeter of 1.0 to 1.8 ml / g. The density of the cigarette paper is preferably 0.4 to 1.0 g / cm 3 .
　本発明では、二次粒子がイガ形状を有する所定の炭酸カルシウムを填料として使用することにより、巻紙の細孔容積が増大し、これにより巻紙の不透明度が高まるとともに、巻紙の燃焼特性が変化して、主流煙中の一酸化炭素量を低減させることができたと推測される。 In the present invention, the use of a predetermined calcium carbonate whose secondary particles have a squid shape as a filler increases the pore volume of the wrapping paper, thereby increasing the opacity of the wrapping paper and changing the combustion characteristics of the wrapping paper. Therefore, it is estimated that the amount of carbon monoxide in mainstream smoke could be reduced.
　本発明のシガレット巻紙は、燃焼調節剤を含んでいてもよい。燃焼調節剤としては、クエン酸アルカリ金属塩が好ましく用いられ、特に好ましくは、クエン酸カリウムおよびクエン酸ナトリウムであり、これらは単独で、または組み合わせて用いることができる。本発明のシガレット巻紙が燃焼調節剤を含む場合、燃焼調節剤は、シガレット巻紙中に、５．０重量％以下の量で含まれることが好ましく、１．５重量％以下の量で含まれることがより好ましい。 The cigarette paper of the present invention may contain a combustion regulator. As the combustion control agent, alkali metal citrate is preferably used, and potassium citrate and sodium citrate are particularly preferable, and these can be used alone or in combination. When the cigarette wrapping paper of the present invention contains a combustion regulator, the combustion regulator is preferably contained in the cigarette wrapping paper in an amount of 5.0% by weight or less, and contained in an amount of 1.5% by weight or less. Is more preferable.
　本発明のシガレット巻紙は、フィルター付きシガレットの巻紙として使用することができる。すなわち、本発明の一つの態様によれば、本発明のシガレット巻紙によりロッド形状に巻かれたたばこ刻みを含むたばこロッドと、このたばこロッドの一端にチップペーパーにより同軸上に接続されたフィルターとを含むシガレットが提供される。 The cigarette paper of the present invention can be used as a cigarette paper with a filter. That is, according to one aspect of the present invention, a cigarette rod including a cigarette wound in a rod shape by the cigarette wrapping paper of the present invention, and a filter coaxially connected to one end of the cigarette rod by tip paper. A cigarette containing is provided.
　本発明のシガレット巻紙は、その表面に燃焼抑制剤を塗布してもよい。すなわち本発明のシガレット巻紙は、低延焼性シガレット巻紙のベース巻紙として使用することもできる。燃焼抑制剤としては、シガレット巻紙に低延焼特性を付与することが知られている任意の物質を使用することができ、たとえばペクチン、アルギン酸塩などを使用することができる。燃焼抑制剤は、公知の手法に従って、ベース巻紙の一方の表面に塗布することができる。燃焼抑制剤は、ベース巻紙の一方の表面の全領域に塗布されてもよいし、ベース巻紙の一方の表面に互いに離間して設けられた複数のバンド状の領域として塗布されてもよい。 The cigarette wrapping paper of the present invention may be coated with a combustion inhibitor on its surface. That is, the cigarette wrapping paper of the present invention can also be used as a base wrapping paper for low fire spread cigarette wrapping paper. As the combustion inhibitor, any substance that is known to impart low fire spreading properties to cigarette wrapping paper can be used. For example, pectin, alginate, or the like can be used. The combustion inhibitor can be applied to one surface of the base wrapping paper according to a known method. The combustion inhibitor may be applied to the entire area of one surface of the base wrapping paper, or may be applied as a plurality of band-shaped regions provided on one surface of the base wrapping paper so as to be separated from each other.
　表面に燃焼抑制剤が塗布されているシガレット巻紙は、塗布されていないシガレット巻紙と比較して主流煙中の一酸化炭素量を増大させることが知られている。しかし、本発明のシガレット巻紙は、低い坪量を有し、優れた一酸化炭素低減効果を有しているため、燃焼抑制剤の塗布により塗布前と比べて主流煙中の一酸化炭素量を増大させるが、一酸化炭素の生成を抑制することが期待される。 It is known that cigarette wrapping paper with a combustion inhibitor applied to the surface increases the amount of carbon monoxide in mainstream smoke as compared to cigarette wrapping paper not coated. However, since the cigarette wrapping paper of the present invention has a low basis weight and an excellent carbon monoxide reduction effect, the amount of carbon monoxide in mainstream smoke can be reduced by applying a combustion inhibitor compared to before application. Although it increases, it is expected to suppress the formation of carbon monoxide.
　以下、実施例により本発明を説明する。 Hereinafter, the present invention will be described with reference to examples.
　例１～８
　例１～例８で使用した炭酸カルシウムの商品名（購入先）は、以下のとおりである。 Examples 1-8
The trade names (purchasers) of calcium carbonate used in Examples 1 to 8 are as follows.
　例１：　PCX-850（白石工業株式会社）
　例２：　球状炭酸カルシウム（ニューライム株式会社）
　例３：　Ultrapaque（スペシャルティミネラルズインコーポレイテッド）
　例４：　六角板状炭酸カルシウム（ニューライム株式会社）
　例５：　針状炭酸カルシウム（ニューライム株式会社）
　例６：　UNICA（米庄石灰工業株式会社）
　例７：　交差円盤状炭酸カルシウム（ニューライム株式会社）
　例８：　カルライトSA（白石工業株式会社）
　例１～７の炭酸カルシウムは、巻紙中で二次粒子を形成するものもあるが、イガ状とはならない。例８の炭酸カルシウムは、巻紙中でイガ形状の二次粒子を形成する。 Example 1: PCX-850 (Shiroishi Industrial Co., Ltd.)
Example 2: Spherical calcium carbonate (New Lime Co., Ltd.)
Example 3: Ultrapaque (Specialty Minerals Incorporated)
Example 4: Hexagonal calcium carbonate (New Lime Corporation)
Example 5: Acicular calcium carbonate (New Lime Corporation)
Example 6: UNICA (Yonesho Lime Industry Co., Ltd.)
Example 7: Crossed disk-like calcium carbonate (New Lime Corporation)
Example 8: Callite SA (Shiroishi Industrial Co., Ltd.)
The calcium carbonates of Examples 1 to 7 may form secondary particles in the wrapping paper, but they do not become squid. The calcium carbonate of Example 8 forms iga-shaped secondary particles in the wrapper.
　パルプ（亜麻）をカナダ濾水度法にて１３０ＣＳＦに叩解し、叩解したパルプに、上記炭酸カルシウムを表１に示す含有量となるように添加した。得られた紙料を用いて、長網式筒型抄紙機により巻紙を調製した。この巻紙を、温度２２℃、相対湿度６０％の条件下で２日間以上調和し、所定の長さに切断した。巻紙中の炭酸カルシウム量は、０．３Ｎ塩酸水溶液にて３０分間超音波抽出を行った後、Agilent社製キャピラリー電気泳動システム（7100）により、カルシウムイオンとして定量し、炭酸カルシウムに換算することで求めた。また、巻紙の不透明度は、株式会社村上色彩技術研究所COLORIMETER(CM-53D) により測定した。 Pulp (flax) was beaten to 130 CSF by the Canadian freeness method, and the calcium carbonate was added to the beaten pulp so as to have the content shown in Table 1. A wrapping paper was prepared from the obtained paper stock using a long-net type tubular paper machine. This wrapping paper was harmonized for two days or more under conditions of a temperature of 22 ° C. and a relative humidity of 60%, and was cut into a predetermined length. The amount of calcium carbonate in the wrapping paper is obtained by performing ultrasonic extraction with a 0.3N hydrochloric acid aqueous solution for 30 minutes, then quantifying it as calcium ions with an Agilent capillary electrophoresis system (7100) and converting it to calcium carbonate. Asked. The opacity of the web was measured with Murakami Color Research Laboratory COLORIMETER (CM-53D).
　得られた巻紙とたばこ刻み（アメリカンブレンド）を用いてシガレットを作製した。巻紙とたばこ刻みから構成されるたばこロッドの一端にチップペーパーを用いてフィルターを付設し、シガレット円周が２４．９ｍｍ、シガレット長さが５７ｍｍになるようにハンドメイドにてシガレットを作製した。たばこ刻みの充填量はシガレット１本当たり０．６１０ｇであった。 Cigarettes were produced using the obtained wrapping paper and cigarette chopping (American blend). A filter was attached to one end of a cigarette rod composed of wrapping paper and cigarette cuts using chip paper, and a cigarette was produced by handmade so that the cigarette circumference was 24.9 mm and the cigarette length was 57 mm. The filling amount of cigarettes was 0.610 g per cigarette.
　得られたシガレットについて、主流煙中の一酸化炭素量をAgi1ent社製Micro-GC（3000A）用いて測定した。１吸煙（パフ）当たりの一酸化炭素生成量を（カナダの保健省検査方法：55ml/2s）で測定した。 About the obtained cigarette, the amount of carbon monoxide in mainstream smoke was measured using Micro-GC (3000A) manufactured by Agi1ent. The amount of carbon monoxide produced per smoke absorption (puff) was measured by the Health Canada inspection method (55 ml / 2s).
　巻紙の不透明度および１吸煙（パフ）当たりの一酸化炭素生成量を表１に示す。
Figure JPOXMLDOC01-appb-T000001
 Table 1 shows the opacity of the wrapping paper and the amount of carbon monoxide produced per smoke absorption (puff).
Figure JPOXMLDOC01-appb-T000001
　各種の炭酸カルシウムを填料として配合した例１～例８の巻紙は、同等の坪量および填料含有量を有しているため、燃焼特性が変わらず、主流煙中一酸化炭素量も同等となることが想定されるが、実際には、炭酸カルシウムの形状の違いにより主流煙中一酸化炭素量に違いが見られた。特に、二次粒子がイガ形状を有する炭酸カルシウムを使用した場合、一般的なシガレット巻紙に使用されている紡錘型形状の炭酸カルシウムの場合と比較して、主流煙中の一酸化炭素量が低減した。 The wrapping papers of Examples 1 to 8 containing various calcium carbonates as fillers have the same basis weight and filler content, so the combustion characteristics do not change and the amount of carbon monoxide in mainstream smoke is also equivalent. Actually, however, there was a difference in the amount of carbon monoxide in mainstream smoke due to the difference in the shape of calcium carbonate. In particular, when calcium carbonate whose secondary particles have a iga shape is used, the amount of carbon monoxide in mainstream smoke is reduced compared to the case of spindle-shaped calcium carbonate used in general cigarette paper. did.
　また、紡錘型形状の炭酸カルシウムを配合した巻紙は、高い不透明度を有することが知られているが、二次粒子がイガ形状を有する炭酸カルシウムを配合した巻紙も、ほぼ同等以上の不透明度を持つことがわかった。 In addition, it is known that a wrapping paper blended with spindle-shaped calcium carbonate has high opacity, but a wrapping paper blended with calcium carbonate whose secondary particles have a squid shape has almost the same or higher opacity. I understood that I have it.
　以上まとめると、二次粒子がイガ形状を有する炭酸カルシウムを配合した巻紙（例８）は、一般的なシガレット巻紙に使用されている紡錘型形状の炭酸カルシウムを配合した巻紙（例１）と比較すると、同等の高い不透明度を持ちながら主流煙中の一酸化炭素生成量を更に減少させることができる。 In summary, the wrapping paper (Example 8) containing calcium carbonate whose secondary particles have a iga shape is compared with the wrapping paper (Example 1) containing spindle-shaped calcium carbonate used in general cigarette wrapping paper. Then, the amount of carbon monoxide produced in the mainstream smoke can be further reduced while having the same high opacity.
　例９～１４
　下記例では、坪量および炭酸カルシウム含有量を変えた場合に、巻紙の不透明度がどのように変化するか調べた。 Examples 9-14
In the following example, it was examined how the opacity of the wrapping paper changed when the basis weight and calcium carbonate content were changed.
　例９～１４の巻紙は、巻紙の坪量および炭酸カルシウム含有量を下記表２で示すように変えた以外は、先に記載した例と同様に調製した。巻紙の不透明度を下記表２に示す。
Figure JPOXMLDOC01-appb-T000002
 The wrapping papers of Examples 9 to 14 were prepared in the same manner as described above except that the basis weight and calcium carbonate content of the wrapping paper were changed as shown in Table 2 below. The opacity of the web is shown in Table 2 below.
Figure JPOXMLDOC01-appb-T000002
　表２に示すように、巻紙の不透明度は、坪量および炭酸カルシウム量が増加するとともに上昇する傾向を示す。これは、パルプ量、炭酸カルシウム量の増加により、繊維内部、繊維間の空隙度合に変化が生じ、光学的界面が増加するためであると考えられ、炭酸カルシウムの形状に関わらず同様の傾向を示した。 As shown in Table 2, the opacity of the wrapping paper tends to increase as the basis weight and the amount of calcium carbonate increase. This is thought to be due to the change in the degree of voids inside and between the fibers due to the increase in the amount of pulp and calcium carbonate, and the optical interface increases, and the same tendency is observed regardless of the shape of calcium carbonate. Indicated.
　例１５～１８
　下記例では、坪量および炭酸カルシウム含有量を変えた場合に、主流煙中の一酸化炭素量および巻紙の不透明度がどのように変化するか調べた。 Examples 15-18
In the following examples, it was examined how the amount of carbon monoxide in the mainstream smoke and the opacity of the wrapping paper changed when the basis weight and calcium carbonate content were changed.
　例１５～１８の巻紙は、巻紙の坪量および炭酸カルシウム含有量を下記表３に示すように変えた以外は、先に記載した例と同様に調製した。調製された巻紙を用いて、先に記載した例と同様にシガレットを作製した。巻紙の不透明度および１吸煙（パフ）当たりの一酸化炭素生成量を下記表３に示す。
Figure JPOXMLDOC01-appb-T000003
 The wrapping papers of Examples 15 to 18 were prepared in the same manner as described above except that the basis weight and calcium carbonate content of the wrapping paper were changed as shown in Table 3 below. A cigarette was produced using the prepared wrapping paper in the same manner as in the example described above. Table 3 below shows the opacity of the wrapping paper and the amount of carbon monoxide produced per smoke absorption (puff).
Figure JPOXMLDOC01-appb-T000003
　表３から、二次粒子がイガ形状を有する炭酸カルシウムを配合した巻紙は、紡錘型形状の炭酸カルシウムを配合した巻紙と比較して、同等の高い不透明度を持ちながら主流煙中の一酸化炭素生成量を更に減少させることができる。 From Table 3, the wrapping paper blended with calcium carbonate whose secondary particles have a squid shape has carbon dioxide in mainstream smoke while having the same high opacity compared to the wrapping paper blended with spindle-shaped calcium carbonate. The amount produced can be further reduced.

Claims (5)

  1. 　１４ｇ／ｍ2以上４０ｇ／ｍ2未満の坪量を有し、二次粒子がイガ形状を有する炭酸カルシウムが、１０～４０重量％の割合で含有されていることを特徴とするシガレット巻紙。 A cigarette wrapping paper characterized by containing 10 to 40% by weight of calcium carbonate having a basis weight of 14 g / m 2 or more and less than 40 g / m 2 and secondary particles having a squid shape.
  2. 　前記炭酸カルシウムの一次粒子が、柱状もしくは針状の形状を有することを特徴とする請求項１に記載のシガレット巻紙。 The cigarette paper according to claim 1, wherein the primary particles of the calcium carbonate have a columnar shape or a needle shape.
  3. 　前記炭酸カルシウムの一次粒子が、４以上１０未満の平均アスペクト比を有することを特徴とする請求項２に記載のシガレット巻紙。 The cigarette wrapping paper according to claim 2, wherein the primary particles of the calcium carbonate have an average aspect ratio of 4 or more and less than 10.
  4. 　クエン酸のアルカリ金属塩からなる燃焼調節剤を含有することを特徴とする請求項１～３のいずれか一項に記載のシガレット巻紙。 The cigarette wrapping paper according to any one of claims 1 to 3, further comprising a combustion regulator made of an alkali metal salt of citric acid.
  5. 　前記燃焼調節剤を、５．０重量％以下の量で含有することを特徴とする請求項４に記載のシガレット巻紙。 The cigarette wrapping paper according to claim 4, wherein the combustion regulator is contained in an amount of 5.0% by weight or less.
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JP5997356B1 (en) * 2015-10-08 2016-09-28 日本製紙パピリア株式会社 Wrapping paper for smoking articles
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