JPS6112674B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a filter for tobacco products that is characterized by low tar and low gas emissions during smoking. In other words, it is a dual-structured filter plug that is equipped with a ventilation means and a flavor imparting means, and these means are combined and integrated. Conventional filters have been used mainly to filter out smoke particle phase components such as nicotine and tar from the viewpoint of smoking hygiene, but recently they have been used to filter out gas phase components other than the smoke particle phase, especially carbon monoxide and nitrogen oxide. There is a desire for a product that contains fewer harmful components such as hydrogen cyanide, acrolein, etc. In order to satisfy these demands, efforts have been made to develop filters equipped with various ventilation means. A filter equipped with a ventilation means can be used as a wrapping material for acetate fiber bundles, paper, or other materials such as permeable wrapping paper, perforated chip paper, etc., to direct airflow from the outer periphery of the filter. Many methods have been adopted to dilute smoke by introducing it into the air. However, if a filter equipped with these venting means is used to significantly dilute or remove smoke particle phase components and gas phase components, the incense will be significantly impaired during smoking, and the smoke will not come out of the mouth during normal inhalation. There are problems with low-tar, low-gas cigarettes, which are preferred by smokers because they do not enter the vagina. A method that is thought to have a significant overeffect of the harmful components is to form a plurality of grooves in the direction of smoke flow on the outer circumferential surface of the filter material, and further wrap the outer circumference with breathable wrapping paper or chip paper, thereby making the filter more effective. Either an airflow space is provided between the wood and its wrapping paper to allow outside air to be introduced inside the filter to dilute the smoke, or the smoke flow is passed through the wood and the airflow is directed along the grooves to the smoker. There is one designed to reach the oral cavity of the patient. Inventions related to such cigarette filters include, for example, U.S. Patent No. 4,261,373;
No. 3490461, No. 3577995, No. 3596663, Special Publication No. 13517, Special Publication No. 55-141184, Special Publication No. 141184, Special Publication No.
Examples include No. 56-31948 and Special Publication No. 57-29147. Selecting the representative patents listed above and researching the functions and effects of cigarette filters, we found that:
It was found that smoke particle phase and gas phase components were significantly diluted or removed. However, it has appropriate ventilation resistance when smoking,
Moreover, even when it was easy to smoke, it had the disadvantage of lacking the tobacco flavor. In order to improve this point, as a result of various studies, a filter containing a flavoring agent in the material, especially in the center of the material, was inserted and connected between the filter equipped with the above-mentioned ventilation means and the cigarette roll. It was found that by using the dual type filter, not only the aroma and taste of the cigarette can be significantly improved, but also the filtered cigarette can be produced with low tar and gas, yet rich in aroma and taste, and the present invention has been completed. That is, the present invention provides a cross section perpendicular to the length direction of a cylindrical filter (hereinafter referred to as a filter cross section).
A material 1 containing a flavoring agent with low ventilation resistance is placed in the center, and a material 2 with high ventilation resistance is placed around the periphery.
A plurality of grooves 5 are formed in the longitudinal direction of the filter, and the outer circumferential surface of the cylindrical filter material 4 is formed by winding up the outer periphery of the material layer formed into two annular layers with the filter wrapping paper 3. and a second filter portion in which ridges 6 are alternately provided.
This is a dual-type cigarette filter in which the outer periphery of the second filter part and the second filter part are wrapped with air-permeable filter wrapping paper 7 so that they are connected to each other in cross section. An object of the present invention is to provide a delicious cigarette that is low in tar and gas and has a rich taste, which smokers can use with peace of mind from the standpoint of smoking hygiene. The filter of the present invention is provided with air circulation grooves on the outer circumferential surface of the mouthpiece side portion, so that air from the outside is introduced directly into the smoker's mouth, and smoke passes through the material layer. In this case, therefore, the smoke particle phase and gas phase components are considerably diluted or removed. On the other hand, the center of the filter part on the tobacco side is equipped with a material layer containing a flavoring agent with low ventilation resistance, so smoke can easily pass through that part, and the effects of water vapor in this smoke and temperature rise, etc. The flavoring agent thus received releases some of its components and reaches the smoker's mouth along with the smoke. Therefore, the smoker can feel that the smoke is lighter than ordinary cigarettes, yet has a richer flavor, and the above-mentioned purpose is achieved. Hereinafter, the filter of the present invention will be explained in detail with reference to the drawings. The filter shown in FIGS. 1 and 2 is constructed in accordance with the invention as follows. The filter part on the side of the cigarette roll 8 is made of a coarse and dense two-layer structure, in which a material layer 2 with high ventilation resistance surrounds a material layer 1 with low ventilation resistance containing a flavoring agent, and the outer periphery of the material layer 1 is wrapped with filter wrapping paper 3. A first filter part made of a material formed in an annular shape, and a second filter part made of a grooved filter in which a plurality of grooves 5 are formed in the direction of smoke flow on the outer peripheral surface of the material 4 corresponding to the mouthpiece side part.
The filter part is rolled up and connected to the air permeable filter wrapping paper 7, and has a dual-type structure. The material for the first filter portion is mainly acetate fiber. The fibers used for the outer peripheral layer of the filter have a single fiber density of 1.5 to 2.5 denier, the cross-sectional shape of the fiber Y, and a total fiber density of 20.000 to 50.000 denier, and the fibers in the center layer have a single fiber density of 2.5 to 8 denier It is preferable to use a material having a C-shaped cross-sectional shape or a hollow cylindrical shape, a total fiber density of 15.000 to 50.000 deniers, etc., because adsorption or release of flavor components is likely to occur. The material for the second filter part is acetate, rayon, nylon, polypropylene, monofilament fiber count of 1.5 to 8 deniers, cross-sectional shape of O type, Y type, etc., total fiber count of 30.000 to 100.000 deniers,
Thermoplastic fibers such as polyethylene, polyvinyl alcohol, ethylene vinyl acetate, and polyester can be used alone or in combination. Further, as a packaging material for these materials, the above-mentioned thermoplastic film or the like is used. FIG. 3 shows a schematic diagram of the first filter plug manufacturing apparatus. The fiber bundle 15 used for the first filter outer peripheral layer is
After the plasticizer has been added, it is introduced into the N section of the annular forming device 18 by guide rolls 16, 17.
On the other hand, the fiber bundle 15' used for the center layer of the filter
After being introduced into the flavoring device 11 and containing a flavoring agent, the water content is adjusted to an appropriate moisture content in the moisture regulating device 13. The scented fiber bundle 15' is transferred to the tension adjusting device 1
4 into the M section of the annular forming device 18 while adjusting the tension and speed. As shown in an enlarged view in FIG. 4, the annular forming device 18 has a structure in which the fiber bundle 15 used for the outer peripheral layer of the filter is divided into a plurality of parts and the fiber bundle 15' in the center layer is evenly wrapped around the fiber bundle 15. . In this way, the two-layer annular fiber bundle is immediately transferred to the winding device 23, its outer periphery is wrapped in the filter wrapping paper 20, and the gluing device 24 glues it to a part of the wrapping paper 20. It is bonded with an ironing heater 25 to form a cylindrical rod. The rod is then cut into plugs of appropriate length by a rod cutting machine 30 and supplied to the filter plug manufacturing process of the present invention. Note that since the hoisting device is the same as a commonly used device, explanations of some of the devices and steps have been omitted. Further, the fragrance device 11 impregnates the fiber bundle 15' in a flavoring solution, sprays and adds a flavoring solution to the fiber bundle 15', or adds a powdered flavoring agent to the fiber bundle 15'. Any method may be used. In addition, when the fiber bundle 15' is impregnated in a flavoring solution, it is dehydrated by the dehydrator 12 and adjusted to an appropriate moisture content. Flavoring agents to be added to the fiber bundle 15' include tobacco flavoring agents, leaf tobacco and plant extracts (including nicotine), carbonized and distilled products of plants, fermented flavoring agents using microorganisms, solid powdered flavoring agents, and the like. Use as appropriate. The flavoring method is to use the above flavoring agents alone or in combination, dissolve them in water or alcohol, and apply the solution to the fiber bundle using the fragrance device 11.
Add fragrance by impregnating or spraying on 5'. Powder and granules are attached to the fiber bundle. FIG. 5 shows a schematic diagram of the second filter plug manufacturing apparatus. That is, the step of supplying the filter material 31 and the packaging material 36 (), the step of forming the material 31 into a rod 42 (rod shape), the step of thermoforming a plurality of grooves on the outer periphery of the rod 42 (), and the step of forming a grooved rod. The process consists of the step of cooling and curing the material and then cutting it to form a filter plug. At the stage (), the material 31, which is a fiber bundle, is made into a ribbon shape, and the tension of the fibers is adjusted by the tension adjustment device 32.
It is supplied by the guide device 33 while adjusting the speed. The plastic film, which is the packaging material for the first material 31, is guided from the supply reel 36 to the next stage via a guide roll 37. In the step (), the winding device 34 and the bonding device 3
5, and the endless belt 4 is conveyed by a belt drive device 38 and guide rolls 39, 41.
The material 31 supplied onto the packaging material 36 on the rod 4 is rolled up into a cylindrical shape by the packaging material 36 in the winding device 34, and then heat-sealed in the adhesive device 35 to form the rod 4.
2 is formed. This step is similar to the normal winding process for filter rods, except that plastic film is used instead of wrapping paper as the wrapping material. Next, the rod 42 is moved to the groove forming device 43 at the stage ().
will be introduced to This device has a built-in heater or hot air generator, and a heating forming tube 45 is provided in the center thereof in the direction of travel. Heat forming tube 4
As shown in a, b, and c of FIG. 7, the inner diameter of the rod 5 is large on the inlet side of the rod and small on the outlet side. As shown in FIG. 6, the molded stainless steel belt 44 is provided with a plurality of grooves and ridges in the length direction, and while being rotated by a belt drive device 46, the upper belt moves from A to A' in the heat forming tube 45. The groove is curved in a U-shape in the cross section, approaches a circular shape in the B-B' cross-section, becomes circular in the C-C' cross-section, and the groove is thermoformed in a state that completely wraps around the outer circumference of the rod. be exposed. From the vicinity of the exit of the groove forming device 43, the molded stainless steel belt 44 extends horizontally from the state a, and the rod 42 is released from the molded stainless steel belt 44. The groove shape of the stainless steel belt 44 has a groove depth of 0.2
~1.0mm, with 3 to 30 grooves, and can be wave-shaped, gear-shaped, spear-shaped, etc., but in reality, it is selected appropriately from these ranges, taking into consideration the performance of the filter and the difficulty in manufacturing the plug. . Also, the molding temperature of the rod is the material 31 and packaging material 36.
Since they have different thermal properties, they are appropriately selected from the range of 100 to 260°C, taking into account softening points, moldability, etc. Note that the groove side of the stainless steel belt 44 is surface-treated with Teflon or other coating agent to prevent the material 31 and the packaging material 36 from melting and adhering to the belt side. The step () consists of a cooling device 47 and a rod cutting machine 53. The grooved rod 52 is cooled in the cooling device 47 until it reaches room temperature and hardened, and then cut into a predetermined length by the rod cutting machine 53. Cut to filter plug. The filter plug manufactured through the above four steps is supplied to the filter plug manufacturing process of the present invention. The method for manufacturing the dual-structured filter plug of the present invention from the first filter plug and second filter plug manufactured in this way can be carried out under the trade names of, for example, "Mild Seven", "Seven Star", and "Mine". This method is similar to the manufacturing method of dual-structure filter plugs used in, etc., and can be easily manufactured using conventionally used equipment. That is, while simultaneously supplying the first filter plug and the second filter plug to the dual filter plug manufacturing apparatus, the filter parts cut to predetermined dimensions are alternately arranged and connected, and the air-permeable filter wrapping paper 7 is used to connect the first filter plug and the second filter plug. The filter plug of the present invention is manufactured by winding. When the filter plug of the present invention is used as a cigarette filter, the filter tip is cut at the center of each of the first and second filter parts, and the first filter part always moves toward the cigarette roll 8 side, A filter part 2 is placed on the mouth side, and its outer periphery is wrapped with tip paper 9 provided with a large number of ventilation holes, and connected to a cigarette roll 8. In this case, the opening area of the tip paper 9 is set in advance so that it is on the circumferential surface of the second filter part and is located close to the first filter part from the center part of the second filter. This is the key point in using the dual-type filter of the present invention to effectively exhibit its function. Note that the hole-opening means for making the chip paper air permeable may be any known electrical or mechanical method, and an appropriate method may be selected to obtain the desired air permeability. Production Example 1 An acetate fiber bundle 15' having a single filament fiber count of 5 deniers, a cross-sectional shape perpendicular to the fiber length direction (hereinafter simply referred to as cross-sectional shape) C, and a total fiber count of 20.000 deniers is introduced into the flavoring device 11, and tobacco extract is added to the acetate fiber bundle 15'. A flavor aqueous solution (5%) was prepared by blending 50 parts of nicotine, 2 parts of nicotine, 18 parts of malic acid, and 30 parts of fermented flavor, and after impregnating the fiber bundle 15' with this solution, the fiber bundle 15' was impregnated with the solution, followed by the dehydration device 12, followed by moisture adjustment. Through the device 13, the moisture content is adjusted to about 10% on a wet basis. The thus scented fiber bundle is introduced into the central portion M of the annular forming device 18. On the other hand, after adding triacetin equivalent to 6% by weight to an acetate fiber bundle 15 with a single filament fiber density of 2 denier, fiber cross-sectional shape Y, and total fiber density of 28.000 denier, this fiber bundle was divided into 8 parts to form a ring. It is introduced into the outer peripheral portion N of the device 18. The fiber bundle introduced into the annular forming device 18 in this way is formed into a two-layer annular structure consisting of the center part of the cylinder and its outer periphery, and then the outer periphery is wound up with a filter wrapping paper 20 in the winding forming device 23. , cut into a cylindrical shape of a predetermined length using a rod cutting machine 30, and
We prototyped a filter plug (120mm). Furthermore, an acetate fiber bundle 31 with a single filament fiber count of 3.3 denier, a fiber cross-sectional shape Y, and a total fiber count of 46,000 denier is led to the winding device 34, where it is formed into a cylindrical shape, and its outer periphery is wound with a polyethylene film having a thickness of 50μ. , build a cylindrical rod 42.
Next, this is led to the groove forming device 43, and the hot air temperature is
After thermoforming the outer periphery of the rod 42 at 180°C with a wavy molded stainless steel belt 44 having a ridge height of 0.6 mm and 16 grooves, the belt was cooled to room temperature using a cooling device 47. After curing, the rod was cut into 120 mm pieces using a rod cutting machine 53 to fabricate a second filter plug having 16 longitudinal grooves on the outer peripheral surface of the cylindrical rod. Next, the first filter plug and the second filter plug that were trial-manufactured in this way were supplied to a commonly used dual structure filter plug manufacturing apparatus (not shown), and the first filter plug was 20 mm, and then the second filter plug is cut to a length of 30 mm, which are arranged in an alternating manner and, after wrapping its circumference with filter paper, which is itself breathable, the first filter plug and the second filter plug are cut into lengths of 30 mm. A dual-type filter chip of the present invention having a length of 25 mm was prepared by cutting the filter portion at each center. Production example 2 The material of the second filter plug in production row 1 was changed from acetate fiber to the following fiber, and the single fiber fiber density was 3.0 denier and the fiber cross-sectional shape was O.
The mold was made in the same manner as in Production Example 1, except that composite fibers made of polyethylene and polypropylene with a total fiber density of 46,000 denier were used, and the forming temperature in the groove forming device 43 was changed to 150°C.
A dual-type filter of the present invention was manufactured on a trial basis. Production Example 3 The flavoring agent to be contained in the core member of the first filter plug in Production Example 1 is the same as that in Production Example 1, but instead of directly impregnating the fiber bundle with an aqueous solution of these flavorants, a solid Production Example 1 except that the method was changed to a method in which a solid flavoring agent adsorbed on phosphoric acid and zirconium silicate powder as a carrier was attached to the fiber bundle at a ratio of 10 mg per 25 mm of filter length. A dual-type filter of the present invention was trial-manufactured in exactly the same manner as described above. Production Example 4 For the purpose of comparison with the dual-type filter of the present invention described in Production Examples 1 to 3, a filter was prepared in exactly the same manner as Production Example 1 except that no flavoring agent was added to the first filter in Production Example 1. A dual-type filter was trial-manufactured. Usage Example The filter chips sampled in Production Examples 1 to 4 were designated as Samples 1 to 4, respectively, and these filter chips and cigarette rolls were connected as follows. The cigarette rolls used were the same as those used for the product name "Highlight" manufactured by Japan Monopoly Corporation (excluding the filter part). The method of connecting the filter tip and the cigarette roll is as shown in Figure 1, by arranging the first filter part so that it is connected to the cigarette roll, and wrapping the outer periphery of the filter tip with a chip paper provided with a large number of ventilation holes. . At this time, avoid applying glue to the area of the paper where the ventilation holes are provided. If the tip paper is provided with ventilation holes, the area of the holes should be located on the circumferential surface of the second filter section and as close as possible to the first filter section. The ventilation hole is
The holes may be made by any known means, but
Here, we used holes with three rows of holes made by electrical means (air permeability: 5.000ml/ ^mm.cm2.100mm ).
_H2O ). The filtered cigarette samples 1 to 4 obtained by connecting the filter tips in this way were measured and evaluated in terms of items 1 to 2 by the methods described in 1 to d below. In addition, these samples 1 to 4
For comparison, the current product "Highlight" (17 mm with a filter, of course) was evaluated in the same way as Reference Sample 5. The results are shown in Tables 1 and 2. B. Airflow resistance Using an airflow resistance measuring device, the airflow resistance was measured in mm on a water column meter when the flow rate of air passing through the cigarette filter was 17.5ml/sec. B. Air inflow rate The measured value is expressed as a percentage when the air flow rate passing through the cigarette filter is 17.5ml/sec using an air inflow rate automatic measuring device (FAMS). C. Using an automatic smoker with a constant volume of nicotine and tar in the smoke, smoking capacity: 35 ml per puff, smoking time: 2 seconds per puff, frequency of puffs: 1 puff per minute, length of remaining smoke: 30 mm. Crude tar (TP) is collected by collecting the mainstream smoke in a Cambridge filter.
Nicotine and water were analyzed using M) and gas chromatography to determine the amount of nicotine and tar. D. Tobacco aroma and taste A panel of 10 sensory testers sampled five samples and asked them to evaluate the smell and taste and comment on the characteristics of the tobacco aroma and taste. The flavor intensity and quality of the samples were evaluated on a ±3 point system using sample 4 as a control.

【table】

[Table] Sample (Hila 115 0 1.2 18.0
)

Claims (1)

[Claims] 1 In the center of the cross section perpendicular to the length direction of the cylindrical filter, a material 1 containing a flavoring agent with low ventilation resistance is placed, and on the outer periphery, a material 2 with high ventilation resistance is placed.
A first filter part is formed by winding up the outer periphery of a two-layer annular material layer with filter paper 3, and a plurality of grooves 5 ridges in the longitudinal direction of the filter are formed on the outer peripheral surface of the cylindrical filter material 4. 6 and second filter portions provided alternately, and the outer periphery thereof is covered with breathable filter wrapping paper so that the first filter portion and the second filter portion are mutually connected in cross section. A dual-type cigarette filter that is rolled up.