JP2019189986A - Plug paper, filter, and cigarette - Google Patents

Abstract

To provide noble plug paper capable of handling with a filter manufacturing apparatus.SOLUTION: The plug paper comprising crepe paper is disclosed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to plug paper, and a filter and cigarette using the plug paper.

FIG. 1 shows an example of a cigarette structure.
The cigarette 1 includes a tobacco rod 10 in which a tobacco leaf notch 11 is wrapped with a smoking article wrapping paper 12, and a filter portion 20 in which a filter material 21 is wrapped in a plug paper 22. The tobacco rod 10 and the filter portion 20 are chip paper. 30 is connected.
In recent years, there has been a growing preference for cigarettes with a mild taste, and a filter part called charcoal filter with activated carbon dispersed inside is provided, or a plurality of ventilation holes are drilled in the circumferential direction of the chip paper. It has been practiced to relax the taste by ambient air flowing in during suction.

  In order to have a mild taste, for example, Patent Document 1 discloses that the surface layer and the back surface layer mainly composed of cellulose fibers are laminated on the both sides of a layer containing chemical fibers by 4000 cholesta units or more. A filter web (corresponding to a plug paper) having an air permeability of 2 is proposed. However, since the paper with high air permeability is inferior in mechanical strength, there is a problem that when the filter material is manufactured by wrapping the filter material with plug paper using a filter manufacturing machine, paper breakage is likely to occur. Moreover, although moderate hardness is requested | required of a filter part, when paper with high air permeability is used, there also exists a problem that a filter part becomes soft.

  Further, in Patent Document 2, by embossing a plug winding paper (corresponding to plug paper) and generating a slight gap between the plug winding paper and chip paper (corresponding to chip paper), A method for improving ventilation and reducing variation in ventilation has been proposed. The plug web described in Patent Document 2 is excellent in mechanical properties at the time of filter manufacture, but is crushed during embossing and has a high density. Energy may increase and burns may occur. And since the taste of a cigarette with a mild taste is diluted, when the plug paper is burnt, it becomes easy to feel a decrease in taste due to the burning smell.

JP 2001-159097 A JP-A-6-90728

  An object of the present invention is to provide a new plug paper that can be handled by a filter manufacturing machine.

Means for solving the problems of the present invention are as follows.
1. Plug paper characterized by comprising crepe paper.
2. The tensile energy absorption is 16 J / m ² or more. Plug paper as described in.
3. 1. Thickness is 50 μm or more Or 2. Plug paper as described in.
4). The air permeability is 500 c. u. It is the above, 1. ~ 3. Plug paper as described in any of the above.
5.1. ~ 4. A filter comprising the plug paper according to any one of the above.
6.5. A cigarette comprising the filter described in 1.

The plug paper of the present invention is made of crepe paper. Crepe paper has a lower tensile strength than ordinary paper, but has a higher tensile energy absorption due to its higher elongation at break. Therefore, although the plug paper of the present invention has low tensile strength, it is difficult for paper breakage to occur when the filter unit is manufactured by the filter manufacturing machine, and the filter can be manufactured at high speed.
The crepe paper has a high air permeability because it has a film thickness, a low density and a bulk as compared with a normal paper. The plug paper of the present invention having a thickness of 50 μm or more has a large value of the second moment of section when it is formed into a cylindrical shape that wraps the filter, so that it is difficult to be crushed and can be a hard suction filter. The air permeability is 500 c. u. The plug paper of the present invention as described above can be perforated by laser processing with low energy, and can realize a mild taste while suppressing the burning odor.

Diagram showing an example of cigarette structure

Details of the present invention will be described below.
The plug paper of the present invention is made of crepe paper.
Crepe paper is a general term for paper having small wrinkles (three-dimensional unevenness), wrinkled in the MD direction, and has undulations in the MD direction intermittently. Crepe paper wrinkles are formed by creping, kurpacking, or the like in the paper making process.
In a dual filter in which a first filter element such as an acetate filter and a second filter element such as a charcoal filter containing activated carbon are connected, the material wrapping paper that forms the outer periphery of each filter element and the filter elements And a molding paper that connects the two. The plug paper of the present invention can be used for a material wrapping paper, a forming paper, or both used in a dual filter.

The plug paper of the present invention can be made from wood pulp such as softwood pulp and hardwood pulp, flax pulp, cannabis pulp, sisal pulp, non-wood pulp such as esparto, and chemical fibers such as rayon, acrylic and polyester.
As the pulp, for example, chemical pulp, ground pulp, chemi-ground pulp, thermomechanical pulp, etc. by kraft cooking method, acidic / neutral / alkali sulfite cooking method, soda salt cooking method and the like can be used.
Examples of chemical fibers include semi-synthetic fibers such as rayon and lyocell, synthetic fibers such as acetate, nylon, vinylon, acrylic, polyester (PET), polyethylene (PE), and polypropylene (PP), and composite fibers thereof. Can be used.
Further, the above-described pulp and chemical fiber can be appropriately mixed and used.

<White filler>
The plug paper of the present invention can be blended with a known white filler. As the white filler, white fillers generally used for plug paper such as calcium carbonate, titanium dioxide, kaolin and the like can be used.
<Paper strength enhancer>
The plug paper of the present invention can be blended with a paper strength enhancer in order to improve the mechanical strength.

The plug paper of the present invention is made of crepe paper. Crepe paper becomes bulky compared to unprocessed paper without wrinkles, so that the thickness increases and the density decreases. The plug paper made of raw paper has a thickness of about 25 to 45 μm and a density of about 0.6 to 0.8 g / cm ³ , whereas the plug paper of the present invention has a thickness of 50 μm to 250 μm. The density can be 0.2 g / cm ³ or more and 0.6 g / cm ³ or less.

  The air permeability of the plug paper of the present invention is not particularly limited, and the air permeability may be high for a mild taste and low for the firm taste. The plug paper of the present invention can have a high air permeability that cannot be achieved without opening the unprocessed paper by creping it strongly. In addition, since the plug paper of the present invention is made of crepe paper that is bulky compared to unprocessed paper, ventilation openings by laser processing can be drilled with low energy. Specifically, the air permeability is 500 c. u. If it is above, since it can drill with a low energy laser, it is hard to produce a burn around a hole and generation | occurrence | production of a burning odor can be suppressed. The air permeability can be further increased by perforating the plug paper made of the crepe paper of the present invention.

  Here, in order to handle plug paper with a filter manufacturing machine, the tensile strength (MD) defined by JIS P8113 is required to be 15.0 N / 15 mm or more. Plug paper that does not satisfy the above-described tensile strength (MD) is likely to break when handled by a machine, and is unsuitable for high-speed production and mass production of cigarettes. And the crepe paper has a smaller tensile strength (MD) than the unprocessed paper, and the tensile strength (MD) may be less than 15.0 N / 15 mm.

  Crepe paper has small tensile strength (MD) but large elongation at break (MD) as compared to unprocessed paper. The elongation at break (MD) of plug paper made of raw paper without wrinkles is usually 1.5% or less. On the other hand, plug paper made of crepe paper has a breaking elongation (MD) of 2.5% or more because wrinkles are stretched when stretched in the MD direction.

Even if the tensile strength (MD) is less than 15.0 N / 15 mm, the crepe paper has a large elongation at break (MD) of 2.5% or more, so a large tensile energy absorption of 20.0 J / m ² or more. (MD). Therefore, even when crepe paper having a tensile strength (MD) of 15.0 N / 15 mm or less is used, paper breakage hardly occurs when the filter unit is manufactured by the filter manufacturing machine, and the filter unit can be manufactured at high speed. The upper limit of the tensile energy absorption amount (MD) of plug paper made of crepe paper is about 600 J / m ² .

<Paper making>
As the paper machine for producing the plug paper of the present invention, any of a long net type paper machine, a round net type paper machine, an inclined short net type paper machine, a twin wire type paper machine and the like can be used. Further, the paper making is performed by either neutral paper making or alkaline paper making. In addition, if necessary, an internal additive for papermaking such as a sulfate band, various anionic, cationic, nonionic or amphoteric yield improvers, drainage improvers, paper strength enhancers, etc. Can be added. Furthermore, papermaking additives such as dyes, pH adjusters, antifoaming agents, pitch control agents, and slime control agents can be added as necessary.

In the papermaking process, plug paper made of the crepe paper of the present invention can be obtained by creping or kulpacking.
Crepe processing is usually performed by applying a blade called a creping doctor to the roll and scraping the paper blade that is in close contact with the roll with the blade. It can be divided into wet methods.
In the dry method, the blade is applied to the Yankee dryer, and after drying with the Yankee dryer, the paper sticking on the surface of the dryer is scraped to wrinkle the paper, so that generally soft paper is obtained.
In the wet method, a blade is applied to the press roll in front of the dryer part, and the paper that is in close contact with the press roll in the state of wet paper is wrinkled to create wrinkles. The rotation speed of the dryer part is adjusted so that the wrinkle does not stretch. It is dried below the speed. The wet dryer part may be dried by an appropriate drying process such as a Yankee dryer, a multi-cylinder dryer, or a hot air dryer. The wet method generally yields paper with a large surface area.
In the present invention, when creping is performed, a wet method suitable for the production of paper having a large specific surface area, which is bulky and can absorb a large amount of tensile energy and has a high air permeability, is preferable.

  The kulpack processing is usually performed by a kulpack apparatus installed in a dryer group of a paper machine. In the Kurupak process, the web is contracted by bringing the web between the roll and the endless rubber blanket and compressing the web with the nip bar and the rubber blanket so that the previously stretched blanket contracts. It is given by.

  The plug paper made of the crepe paper of the present invention forms small wrinkles (three-dimensional irregularities) on the paper after the paper making process in addition to the dry creping, wet creping, and kurpack processing. It can also be manufactured by secondary processing. As the secondary processing, in addition to dry creping processing, Mike Rex processing (see Special Table 2009-522466), embossing, and the like can be given.

<Cigarette>
A filter part is manufactured by wrapping the filter material with the plug paper of the present invention, and a cigarette can be manufactured by connecting the filter part and the tobacco rod with chip paper.
At this time, ventilation holes are punched in the chip paper as necessary. The perforation can be performed by a laser, a needle, static electricity or the like, but is generally performed by laser processing after cigarette manufacture. In laser processing after cigarette manufacture, the opening penetrates not only the chip paper but also the plug paper of the present invention. In addition, by connecting the filter portion and the tobacco rod with a chip paper provided with a hole in advance, the plug paper of the present invention can be provided with no hole. Since the plug paper of the present invention has irregularities on the surface and there is a gap between the plug paper and the chip paper, regardless of the presence or absence of holes in the plug paper, compared to plug paper made of unprocessed paper, Since ambient air can be reliably sucked in a predetermined amount, a cigarette having a desired taste as designed can be obtained.

  In addition, the hardness of the cigarette mouth is a cause when a smoker selects a cigarette, and many smokers prefer a hard mouth. The crepe paper has a low Young's modulus because of its low density, but because of the thick paper, the sectional moment of inertia becomes large. Therefore, by using the plug paper of the present invention, it is possible to obtain a cigarette with a hard mouth which is preferred by many smokers.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited only to the following Example.
"Example 1"
Wood pulp (conifer pulp: 100%) was beaten to a freeness of 13 ° SR to prepare a raw material slurry. This raw slurry is made with a long net paper machine to form a base paper, creped by a wet method, dried to a density of 0.436 g / cm ^3, and basis weight: 48. 0.0 g / m ² , thickness: 110.0 μm, ash content: 0.1%, air permeability: 1890 c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 58.0 J / _m ² was obtained.

"Example 2"
The same raw material slurry as in Example 1 is made with a long net paper machine to form a base paper, creped by a wet method, and then dried to a density of 0.366 g / cm ^3. , Basis weight: 53.0 g / _m ² , Thickness: 145.0 μm, Ash content: 0.1%, Air permeability: 2578 c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 92.9 J / _m ² was obtained.

"Example 3"
The same raw material slurry as in Example 1 is made with a long net paper machine to form a base paper, creped by a wet method, and then dried to a density of 0.317 g / cm ^3. , Basis weight: 58.6 g / m ² , thickness: 185.0 μm, ash content: 0.1%, air permeability: 3850 c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 454.3 J / _m ² was obtained.

Example 4
Wood pulp (conifer pulp: 65%, hardwood pulp: 35%) was beaten to a freeness of 75 ° SR, and calcium carbonate (PCX-850 manufactured by Shiraishi Kogyo Co., Ltd.) was added in an amount of 26% by mass relative to the total mass of the wood pulp. A raw slurry was prepared. The raw slurry is made with a long paper machine to form a base paper, creped by a wet method, dried to a density of 0.420 g / cm ^3, and a basis weight of 23. 0.1 g / m ² , thickness: 55.0 μm, ash content: 16.8%, air permeability: 253 c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 23.9 J / _m ² was obtained.

"Example 5"
Wood pulp (conifer pulp: 65%, hardwood pulp: 35%) was beaten to a freeness of 72 ° SR, and a wet paper strength agent (manufactured by Seiko PMC, WS4026) was added to 0.5% of the total weight of the wood pulp and A sizing agent (size pine K901, manufactured by Arakawa Chemical Industries, Ltd.) was added in an amount of 0.3% with respect to the total mass of the wood pulp to prepare a raw material slurry. This raw slurry is made with a long net paper machine to form a base paper, and a 91/9 mixed solution of oxidized starch (Nihon Cornstarch, SK-100) / size agent (Seiko PMC, SS2526) is size-press coated. After creping by the wet method, it was dried to a density of 0.268 g / cm ³ , basis weight: 62.7 g / m ² , thickness: 234.0 μm, ash content: 0.1%, air permeability: 279 c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 330.6 J / _m ² was obtained.

"Example 6"
Wood pulp (conifer pulp: 65%, hardwood pulp: 35%) was beaten to a freeness of 72 ° SR, and a wet paper strength agent (manufactured by Seiko PMC, WS4026) was added to 0.5% of the total weight of the wood pulp and A sizing agent (size pine K901, manufactured by Arakawa Chemical Industries, Ltd.) was added in an amount of 0.3% with respect to the total mass of the wood pulp to prepare a raw material slurry. This raw slurry is made with a long net paper machine to form a base paper, and a 91/9 mixed solution of oxidized starch (Nihon Cornstarch, SK-100) / size agent (Seiko PMC, SS2526) is size-press coated. After the creping, it was creped by a wet method and then dried to a density of 0.500 g / cm ³ , basis weight: 32.0 g / m ² , thickness: 64.0 μm, ash content: 0.1%, air permeability: 8c. u. A plug paper made of crepe paper having a tensile energy absorption (MD) of 48.5 J / _m ² was obtained.

"Comparative Example 1"
The same raw material slurry as in Example 1 was made with a long-mesh paper machine, basis weight: 42.0 g / m ² , thickness: 76.0 μm, density: 0.553 g / cm ³ , ash content: 0.1 %, Air permeability: 215 c. u. A plug paper having a tensile energy absorption (MD) of 29.7 J / _m ² was obtained.

"Comparative Example 2"
The same raw material slurry as in Example 4 was made with a long-mesh paper machine, basis weight: 24.1 g / m ² , thickness: 34.0 μm, density: 0.709 g / cm ³ , ash content: 17.0 %, Air permeability: 10 c. u. A plug paper having a tensile energy absorption (MD) of 16.5 J / _m ² was obtained.

“Comparative Example 3”
In the same manner as in Example 5, a base paper was formed and size press-coated, basis weight: 48.5 g / m ² , thickness: 46.0 μm, density: 1.054 g / cm ³ , ash content: 0.00. 1%, air permeability: 0c. u. A plug paper having a tensile energy absorption (MD) of 58.4 J / _m ² was obtained.

“Comparative Example 4”
In the same manner as in Example 6, a base paper was formed and size press-coated, basis weight: 36.1 g / m ² , thickness: 35.0 μm, density: 1.031 g / cm ³ , ash content: 0.00. 1%, air permeability: 0c. u. A plug paper having a tensile energy absorption (MD) of 50.7 J / _m ² was obtained.

Conventional plug paper (raw paper) is described in Reference Examples 1 and 2 below.
"Reference Example 1"
Wood pulp (conifer pulp: 65%, hardwood pulp: 35%) is beaten to a freeness of 10 ° SR, and a wet paper strength agent (manufactured by Seiko PMC, WS4026) is added to the total mass of the wood pulp by 1.5%. The raw material slurry was prepared. This raw material slurry is made with a long net paper machine, basis weight: 27.5 g / m ² , thickness: 47.5 μm, density: 0.579 g / cm ³ , ash content: 0.1%, air permeability: 397c. u. A plug paper having a tensile energy absorption (MD) of 24.6 J / _m ² was obtained.

"Reference Example 2"
Wood pulp (conifer pulp: 73%, hardwood pulp: 27%) was beaten to a freeness of 15 ° SR, and sizing agent (Arakawa Chemical Industries, Size Pine K901) was 0.4% based on the total mass of the wood pulp. And added to prepare a raw slurry. The raw slurry is made with a circular net paper machine to form a base paper, and a 98/2 mixed solution of polyvinyl alcohol (Denka, A-50) / size agent (Arakawa Chemical Industries, Polymaron 360) is size pressed. Coating, basis weight: 25.1 g / m ² , thickness: 50.2 μm, density: 0.500 g / cm ³ , ash content: 0.1%, air permeability: 1960 c. u. A plug paper having a tensile energy absorption (MD) of 29.7 J / _m ² was obtained.

<Evaluation>
The following evaluation was performed in the above Examples and Comparative Examples. The results are shown in Table 1.
(Pulp freeness)
The freeness of the pulp raw material used in each example was measured by a shopper-regula method defined in JIS P8121-1.
(Basis weight)
The basis weight of the plug paper obtained in each example was measured by the method defined in JIS P8124.
(Thickness / density)
The thickness of the plug paper obtained in each example was measured by the method defined in JIS P8118, and the density was calculated by the method defined by the same standard.

(Tensile strength, elongation at break, absorption of tensile energy)
The tensile strength (MD), elongation at break (MD), and tensile energy absorption amount (MD) in the longitudinal direction (MD direction) of the plug paper obtained in each example are manufactured by Kumagaya Riki Kogyo Co., Ltd .: Horizontal tensile tester. (No. 2000-C) was measured based on the method (only in the vertical direction) defined in JIS P8113.
(Air permeability)
The air permeability of the plug paper obtained in each example was measured by a method defined in ISO 2965 using a gas permeability tester (Air Permeability Tester A20) manufactured by Borgworld.

(ash)
The ash content of the plug paper obtained in each example is shown by the ash content at 525 ° C. measured by JIS P8252.

  The plug paper that is the crepe paper manufactured in Examples 1 to 6 becomes bulky, the thickness increases, and the density decreases, compared to the plug paper that is the raw paper manufactured in Comparative Examples 1 to 4. Increased air permeability. Moreover, the plug paper which is the crepe paper manufactured in Examples 1 to 6 is lower in tensile strength (MD) and elongation at break (compared with the plug paper which is raw paper manufactured in Comparative Examples 1 to 4). An increase in tensile energy absorption (MD) due to an increase in MD) was confirmed.

(Filter manufacturing)
Using the plug paper obtained in each example, a plain filter having a circumference of 24.2 mm and a winding length of 120 mm was produced with a filter winder (KDF-3 manufactured by Hauni).

The plug paper produced in the examples, comparative examples, and reference examples could all be used for producing plain filters. In particular, the plug paper produced in Examples 3 and 4 having a tensile strength (MD) of less than 15 N / 15 mm could produce a plain filter without causing paper breakage.
The plug paper made of the crepe paper manufactured in Examples 1 to 6 has an air permeability of 8c. u. ~ 3850c. u. Thus, the air permeability in a wider range than that of the conventional plug paper made of unprocessed paper manufactured in Reference Examples 1 and 2 could be realized. Therefore, the plug paper made of the crepe paper according to the present invention can be a cigarette of the desired taste by adopting a plug paper having an appropriate air permeability. In addition, since the thickness is as large as 55 μm to 234 μm, the Young's modulus increases when the filter is wound in a cylindrical shape, so that the suction mouth can be hardened.

DESCRIPTION OF SYMBOLS 1 Cigarette 10 Cigarette rod 11 Cigarette leaf tick 12 Wrapping paper 20 for smoking articles Filter part 21 Filter material 22 Plug paper 30 Chip paper

Claims (6)

  Plug paper characterized by comprising crepe paper. The plug paper according to claim 1, wherein a tensile energy absorption amount is 16 J / m ² or more.   The plug paper according to claim 1 or 2, wherein the thickness is 50 µm or more.   The air permeability is 500 c. u. It is the above, The plug paper in any one of Claims 1-3 characterized by the above-mentioned.   A filter comprising the plug paper according to claim 1. A cigarette comprising the filter according to claim 5.