JPWO2007119484A1 - Low spread fired cigarette paper - Google Patents

Abstract

The low flame spread cigarette paper has a base paper having a basis weight of more than 22 g / m @ 2 and a plurality of combustion suppression regions provided on one surface of the base paper so as to be separated from each other. The combustion-inhibiting region is formed by applying sodium alginate having a degree of polymerization of about 500 to about 900, or sodium alginate having a viscosity of 19000 cP or more measured at 25 ° C. in a 3% by weight aqueous solution. .

Description

  The present invention relates to a cigarette wrapping paper having low fire spread.

  If cigarettes fall on the floor, etc. due to carelessness of the smoker, apply alginate salt to at least a part of the base wrapping paper to reduce the air permeability of the base wrapping paper so that it is difficult to spread from the fire type to the floor, etc. A cigarette wrapping paper has been proposed (see Japanese Patent Application Laid-Open No. 7-300795).

  However, in Japanese Patent Application Laid-Open No. 7-300795, the air permeability of the wrapping paper coated with the salt of alginic acid is measured, but the actual fire spreadability of the wrapping paper is not measured.

  The inventors of the present invention have studied the effect of sodium alginate on the actual fire spread of the wrapping paper among the salts of alginic acid, and the amount of coating required to show the same fire spread is dependent on the degree of polymerization or viscosity of sodium alginate. I found something different.

  That is, an object of the present invention is to provide a cigarette wrapping paper that exhibits excellent low fire spread characteristics with a relatively small coating amount.

According to a first aspect of the present invention, the base wrapping paper having a basis weight exceeding 22 g / m ² and a plurality of combustion suppression regions provided on one surface of the base wrapping paper so as to be spaced apart from each other, the combustion The suppression area is formed by applying a sodium salt of alginic acid having a degree of polymerization of about 500 to about 900 and having a low flame spread cigarette paper.

According to a second aspect of the present invention, there is provided a base wrapping paper having a basis weight of more than 22 g / m ² and a plurality of combustion suppression regions provided on one surface of the base wrapping paper so as to be separated from each other. The suppression region is provided with a low fire spread cigarette wrapping paper formed by applying sodium alginate having a viscosity of 19000 cP or higher measured at 25 ° C. in a 3% by weight aqueous solution.

According to the third aspect of the present invention, the base wrapping paper contains a filler at a ratio of ² g / m ² or more, has a basis weight of more than 22 g / m ^2, and an intrinsic air permeability of 30 to 60 cholesterol units. And a cigarette wrapping paper comprising a plurality of combustion suppression regions provided on one surface of the base wrapping paper, the combustion suppression region being coated with sodium alginate in an amount of less than 3 g / m ^2. Once formed, the cigarette paper is provided with a low fire spread cigarette paper that provides a cigarette having a PFLB value of 0-10% as measured according to ASTM E-2187-04.

FIG. 1 is a partially broken schematic perspective view showing an example of a cigarette wound with a cigarette paper according to one embodiment of the present invention.

  Hereinafter, the present invention will be described in more detail.

  The cigarette wrapping paper of the present invention is a base wrapping paper provided with a plurality of combustion suppression regions spaced apart from each other by applying a combustion inhibitor made of sodium alginate.

The base wrapping paper is an ordinary cigarette wrapping paper based on pulp such as ordinary flax pulp. Such base wrapping paper may contain a commonly used filler such as carbonates such as calcium carbonate and potassium carbonate, and hydroxides such as calcium hydroxide and magnesium hydroxide at a rate of ² g / m ² or more. it can. Filler may be contained in the base cigarette paper in an amount of 2 to 8 g / m ^2. Further, the base wrapping paper usually has a basis weight exceeding 22 g / m ² . The basis weight is usually 80 g / m ² or less, preferably more than 20 g / m ² and 28 g / m ² or less. The inherent air permeability of the base wrapping paper is typically 30-60 coresta units.

  A combustion regulator such as citric acid or a salt thereof (sodium salt, potassium salt) can also be added to the base wrapping paper. Usually, the combustion control agent is used in a ratio of 2% by weight or less in the base wrapping paper when it is blended.

  On one surface of the base wrapping paper, a plurality of combustion suppression regions respectively formed by application of a combustion inhibitor (sodium alginate) are provided separately. When the wrapping paper is wound around the tobacco rod, the combustion suppression region can be provided in the form of a plurality of stripes extending in the longitudinal direction of the tobacco rod and spaced apart from each other in the circumferential direction of the tobacco rod, or the tobacco rod Can be provided in the form of a plurality of circular bands extending in the circumferential direction and spaced apart from each other in the longitudinal direction of the tobacco rod.

  In the present invention, sodium alginate is used as a combustion inhibitor. Alginic acid is a polyuronic acid composed of two types of monomers, β-D-mannuronic acid and α-L-guluronic acid. In one embodiment of the present invention, a sodium salt of alginic acid having a degree of polymerization (number of monomers) of 500 to 900 is used. In another embodiment of the present invention, sodium alginate is used in which a 3% by weight aqueous solution exhibits a viscosity of 19000 cP or higher as measured at 25 ° C. The degree of polymerization of alginic acid and the viscosity correlate to some extent. By using sodium alginate exhibiting such a high degree of polymerization or viscosity, the same low fire spread property level can be achieved with a smaller amount of coating than when other sodium alginate is used. The viscosity is usually 40000 cP or less.

Generally, the total coating amount (dry basis) of the sodium alginate combustion inhibitor is less than 3 g per 1 m ² of the area of the coated part. A coating amount of 0.2 to ² g / m ² can achieve a sufficiently low fire spreadability. The wrapping paper according to the present invention provides a cigarette (cigarette wrapped with a tobacco filler with the wrapping paper) showing a PFLB (percent full-length burn) value of 0-10% as measured according to ASTM E-2187-04. obtain.

The cigarette wrapping paper according to one aspect of the present invention is a base wrapping paper containing a filler at a ratio of ² g / m ² or more, a basis weight exceeding 22 g / m ^2, and an intrinsic air permeability of 30 to 60 cholesterol units. And a plurality of combustion suppression regions provided on one surface of the base wrapping paper so as to be separated from each other. This combustion suppression region is formed by applying sodium alginate in an amount of less than 3 g / m ² , and a cigarette formed by wrapping a tobacco filler rod with this wrapping paper is measured according to ASTM E-2187-04. And exhibit a PFLB value of 0-10%.

  The low-flammability wrapping paper of the present invention winds a tobacco rod made of a tobacco filler such as tobacco cut, and the surface coated with a combustion inhibitor is usually in contact with the tobacco rod.

  FIG. 1 shows a cigarette wound with a cigarette wrapping paper to which a combustion inhibitor is applied in the form of a circle.

  Referring to FIG. 1, a cigarette 10 has a tobacco rod 11 made of a tobacco filler 13 wound in a column shape with a base wrapping paper 12. The tobacco rod 11 usually has a circumferential length of 17 mm to 26 mm and a length of 49 mm to 90 mm. A normal filter 18 can be attached to the base end (that is, the downstream end in the smoke absorption direction) 11b of the tobacco rod 11 using a tip paper 17 by a conventional method.

  The base wrapping paper 12 is formed with a plurality of circular strip regions 14 coated with a combustion inhibitor (sodium alginate), each defining a combustion suppression region. These circular-band-like combustion suppression regions 14 are formed apart from each other in the longitudinal direction of the tobacco rod.

  A normal combustion region 15 in which no combustion regulator is applied is defined between adjacent circular-band combustion suppression regions 14. Since this region 15 is constituted by a portion of the base wrapping paper 12, it can be burned in a normal smoking state in the same manner as the base wrapping paper 12 itself. Therefore, the region 15 acts as a normal combustion region. For example, two or three circular belt-like combustion suppression regions 14 can be provided. Moreover, as for the strip | belt-shaped combustion suppression area | region 14, the width | variety of a longitudinal direction can be 4 mm-7 mm, and thickness can be 0.1-5 micrometers normally. The interval between adjacent combustion suppression regions 14 is preferably 18 mm to 25 mm.

  In the cigarette shown in FIG. 1, the combustion inhibitor is not applied to the region 16 separated from the tip by a distance d. The portion of the tip that is not coated with the combustion inhibitor also constitutes the normal combustion region 16 and can correspond to a region that burns with one or two puffs of a normal cigarette. The distance d can be 10 mm to 25 mm from the tobacco rod tip 11a. It is not particularly necessary to form the combustion suppression region 14 on the inner surface of the wrapping paper corresponding to the portion of the wrapping paper 12 covered with the chip paper 17.

  When the cigarette 10 is ignited at the tip 11a of the cigarette rod 11 and sucked to burn the cigarette, the normal combustion region 15 can be burned in the same manner as a normal cigarette, and the taste can be tasted. However, when the cigarette 10 is placed on a combustible material such as carpet, tatami mat, wooden product, cloth, clothes, etc. in an ignited state, it is contained in the combustion suppression region 14 existing in the combustion direction, the heat absorption by the combustible material, and the tobacco filler. The cigarette 10 is extinguished in combination with the expanded tobacco cut, and the spread of combustible materials is suppressed.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

Examples 1-6 and Comparative Examples 1-9
First, the polymerization degree and viscosity of sodium alginate used in the present examples and comparative examples are shown in Table 1 below. The sodium alginate used was manufactured by KIMIKA (registered trademark), and the sodium alginates indicated as ALG-1, ALG-2, ALG-3, ALG-4 and ALG-5 were ULV, IL- 2, I-1, I-5 and IS under the trade names.

  The viscosities shown in Table 1 are as follows: 200 g of a 3% by weight aqueous solution of sodium alginate is placed in a 200 mL or 300 mL beaker, the beaker is placed in a constant temperature water bath, the temperature of the aqueous solution is kept at 25 ± 0.5 ° C., and no bubbles are introduced. The sample was gently stirred with a glass rod for about 1 minute and allowed to stand for 10 minutes, and then measured with a B-type viscometer.

A 3% by weight aqueous solution of sodium alginate is applied to the base wrapping paper (width 27mm, length 1.500m) shown in Table 2 with a constant width of 7mm in the longitudinal direction and a direct gravure method at a constant interval of 20mm. A total of 56 combustion inhibitor application areas were provided by printing. About the obtained wrapping paper, the total application amount of sodium alginate was measured by the following method. The results are also shown in Table 2. As shown in Table 2, in Examples 1 to 6, the application amount of the combustion inhibitor was 1.5 to ² g per 1 m ² of the area where the combustion inhibitor (sodium alginate) was applied. When the amount of application of the combustion inhibitor is converted per wrapping paper area, it is multiplied by 7/27, and is 0.39 to 0.52 g / m ² .

  Using the obtained wrapping paper, a tobacco rod made of American blend cuts (tar amount when no filter is attached: 19 to 20 mg) is wound, and a first coating region is arranged with a width of 5 mm from the cigarette burning tip. Disconnected to be. The cigarette length per one was 59 mm, and the combustion inhibitor application area was two.

  About the obtained cigarette, the fire spread test was done according to ASTM E-2187-04, and the PFLB value was measured. The results are shown in Table 2.

<Measurement of total coating amount of sodium alginate>
In accordance with “Quantitative analysis of sodium alginate in food” described in “Food Hygiene Journal”, Vol. 5, pp. 297-302 (1988), without degreasing, dilute sulfuric acid treatment and deproteinization treatment The measurement was performed according to the following procedure.

  Wrapping paper (1.500 m, width 27 mm) (about 1.0 g) coated with the above combustion inhibitor was cut into 5 mm squares, 40 mL of a 1% by weight aqueous sodium hydrogen carbonate solution was added, and heated at 60 ° C. for 5 minutes in a hot water bath. Thereafter, the mixture was sufficiently mixed and stirred, and a supernatant (extract) was obtained by centrifugation (3500 rpm, 10 minutes; the same applies hereinafter). The extraction residue is subjected to the same extraction again to obtain a supernatant (extract), and 20 mL of a 1% by weight aqueous sodium hydrogen carbonate solution is added to the extraction residue, followed by thorough mixing and stirring. Obtained. The three extracts were combined and 1% by weight aqueous sodium hydrogen carbonate solution was added to make 100 mL, which was used as a test solution.

  Sodium-alginate standard solution (1 wt% aqueous sodium hydrogen carbonate solution containing sodium alginate at a concentration of 0 to 0.2 mg / mL) and 1 mL of each of the above test solutions were each added with a copper-hydrochloric acid solution (containing 0.05 wt% copper sulfate). 8.5 mL of hydrochloric acid) and 1 mL of naphthoresorcinol solution (0.4 wt% 1,3-dihydroxynaphthalene aqueous solution) were added, heated in a boiling water bath for 65 minutes, then cooled in ice water, and 4 mL of butyl acetate was added. Shake and centrifuge.

1 mL of the upper layer after centrifugation was collected, diluted by adding 3 mL of butyl acetate, colorimetrically determined at 566 nm, and the total coating amount was calculated.

Comparing Comparative Example 2 and Comparative Example 3, Example 1 and Example 2, and Comparative Example, Example 1 and Example 2 are significantly less in order to achieve the same PFLB value (0-5). It can be seen that the amount of combustion inhibitor (sodium alginate) is sufficient. Further, when Comparative Example 6 and Comparative Example 7 are compared with Example 5 and Example 6, Example 5 and Example 6 have significantly smaller PFLB values at the same coating amount (1.5 g / m ² ). You can see that

  As described above, according to the present invention, a cigarette paper exhibiting excellent low fire spread characteristics is provided.

Claims (14)

A base wrapping paper having a basis weight of more than 22 g / m ² and a plurality of combustion suppression regions spaced apart from each other on one surface of the base wrapping paper, wherein the combustion suppression region is a polymerization of about 500 to about 900 A low-fire-spreading cigarette paper which is formed by applying a sodium salt of alginic acid having a certain degree. The cigarette paper according to claim 1, wherein the base paper has a basis weight of 80 g / m ² or less. A base wrapping paper having a basis weight of more than 22 g / m ² and a plurality of combustion suppression regions provided on one surface of the base wrapping paper so as to be spaced apart from each other, wherein the 3% by weight aqueous solution is 25 ° C. A low-fire-spreading cigarette paper, which is formed by applying sodium alginate having a viscosity of 19000 cP or more as measured by 1. 4. The cigarette paper according to claim 3, wherein the base paper has a basis weight of 80 g / m ² or less and the sodium alginate year is 40000 cP or less. A base wrapping containing a filler at a rate of ² g / m ² or more, a basis weight exceeding 22 g / m ^2, and an intrinsic air permeability of 30 to 60 Cholesta units and one surface of the base wrapping paper are separated from each other A cigarette wrapping paper provided with a plurality of combustion suppression regions, wherein the combustion suppression region is formed by applying sodium alginate in an amount of less than 3 g / m ² , and the cigarette wrapping paper is: A low fire spread cigarette paper that provides a cigarette that exhibits a PFLB value of 0-10% as measured according to ASTM E-2187-04. The cigarette for cigarette according to claim 5, wherein the filler is contained in the base wrapping paper at a rate of 8 g / m ² or less, and the sodium alginate is applied to the base wrapping paper at a rate of 0.2 to ² g / m ² . Wrapping paper.   2. The wrapping paper according to claim 1, wherein the combustion suppression region is in the form of a plurality of stripes extending in a longitudinal direction of the tobacco rod and spaced apart from each other in a circumferential direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   4. The wrapping paper according to claim 3, wherein the combustion suppression region is in the form of a plurality of stripes extending in a longitudinal direction of the tobacco rod and spaced apart from each other in a circumferential direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   6. The wrapping paper according to claim 5, wherein the combustion suppression region is in the form of a plurality of stripes extending in a longitudinal direction of the tobacco rod and spaced apart from each other in a circumferential direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   2. The wrapping paper according to claim 1, wherein the combustion suppression region is in the form of a plurality of circular bands extending in a circumferential direction of the tobacco rod and spaced apart from each other in a longitudinal direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   4. The wrapping paper according to claim 3, wherein the combustion suppression region is in the form of a plurality of circular bands extending in a circumferential direction of the tobacco rod and spaced apart from each other in the longitudinal direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   6. The wrapping paper according to claim 5, wherein the combustion suppression region is in the form of a plurality of circular bands extending in a circumferential direction of the tobacco rod and spaced apart from each other in the longitudinal direction of the tobacco rod when the wrapping paper is wound around the tobacco rod. .   A wrapping paper according to claim 1 which provides a cigarette which exhibits a PFLB value of 0-10% as measured according to ASTM E-2187-04.   A wrapping paper according to claim 3, which provides a cigarette which exhibits a PFLB value of 0-10% as measured according to ASTM E-2187-04.

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