JPH06169744A - Tobacco filter of double concentric circle complex structure and its production - Google Patents

Abstract

PURPOSE:To obtain the subject filter having high elimination ratio of particulate components in a smoke flow, an excellent feeling of smoking and flavor by opening a fiber material consisting essentially of crimped filament tow, uniformly attaching a plasticizer, treating the tow under a specific condition and integrating the treated tow into a sheath-core type. CONSTITUTION:A fiber material consisting essentially of crimped filament tow is uniformly opened, evenly coated with a plasticizer, preferably triacetin, fed to an outer pipe of a double conical pipe and bundled in a cylindrical state. A tow-like fiber bundle as a fiber material 1 of core part is uniformly opened in the cylindrical material, preferably a plasticizer is uniformly applied to the fiber material to give a fiber sheetlike material. Or, a pulp fiber material is molded into a corrugated sheet by a grooved thermally forming roll, passed through a central circular tubular part of a double conical pipe and integrated into a sheath-core shape to give the objective filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double concentric circular structure tobacco filter and a method for producing the same, and more specifically to a sheath portion made of a long fiber crimped tow cylinder, the core portion of which is corrugated. The present invention relates to a concentric double-structured tobacco filter composed of a sheet of a woven fiber material.By using a tobacco filter with such a structure, it is possible to remove tar and nicotine contained in tobacco smoke during smoking. Despite its high rate, it has a good flavor and taste and has a small suction resistance, so that it does not require an excessive suction force during smoking, and a cigarette filter having a good smoking feeling is provided.

[0002]

2. Description of the Related Art Conventionally, in order to solve the problem of bad health caused by smoking cigarettes, the removal efficiency of harmful components contained in cigarette smoke is high, and the suction resistance when smoking is not great. Tobacco filters are being developed to obtain tobacco with a good taste. To increase the efficiency of removing harmful components contained in tobacco smoke, increase the filling amount of the filter material filled in the tobacco filter, lengthen the tobacco filter, or make the filter material finer or have an irregular cross section. Although methods for increasing the contact area between the smoke particle component and the filter material during smoking have been proposed, the cigarette filters produced by these methods have the drawback that the suction resistance during smoking increases and the smoking sensation is impaired. There is. As a cigarette filter that does not impair the smoking sensation, it diminishes the flow of cigarette smoke with ventilation air to reduce the amount of particulate matter that is sucked into the smoker's mouth, giving a so-called ventilation effect. The method is being developed.

However, in any case, reducing harmful components contained in tobacco smoke leads to impairing aroma and flavor at the time of smoking, and thus development of a tobacco filter having few harmful components and having a good flavor and aroma. Has not been done yet. As a tobacco filter with less difficulty as described above, for example, Japanese Patent Publication No. 63-60991 discloses a corrugated sheet in which a crushed pulp mainly containing cellulose is added to a uniformly opened tow-shaped fiber bundle and a corrugated thermoforming device is used. Tobacco filters are shown in Japanese Patent Publication No. 58-6467. One of them is an outer tube of a double conical tube, and the other is a cylindrical filter. Is shown in a central circular tubular section to focus the tobacco filter into a sheath core structure.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 63-6099
The invention described in Japanese Patent Publication No. 1 discloses a sheet-shaped product obtained by corrugating a tow-shaped fiber bundle, thereby increasing the filling amount of the tow-shaped fiber bundle serving as a filter material in the sheet. Although it is intended to enhance the filtration efficiency of the particulate component, there is a drawback in that the filtration efficiency cannot be enhanced despite the large amount of the tow-shaped fiber bundle used.

Further, by using two kinds of different fiber materials having a double concentric circular structure disclosed in Japanese Patent Publication No. 58-6467,
Although it is intended to enhance the efficiency of removing particulate components in tobacco smoke without lowering the flavor and taste of cigarettes,
It is still inadequate to make a cigarette filter that keeps both characteristics well balanced.

[0006]

Therefore, the present inventors have studied to obtain a tobacco filter which has a small reduction in smoking sensation during smoking and a high removal efficiency of the particulate components in the tobacco smoke. The present invention has been completed. The gist of the present invention is a double concentric circular structure tobacco filter, in which the sheath portion is composed of a hollow cylindrical body made of a fiber material mainly containing long fiber crimp tow, and the core portion is long fiber crimp. A double concentric circular composite structure tobacco filter characterized by being constituted by a corrugated sheet-like material composed mainly of tow or pulp fiber material, and a method for producing the same.

A cross-sectional view of the double concentric tobacco filter of the present invention is shown in FIG. 1, and a vertical cross-sectional view is shown in FIG. In these figures, 1 is a core portion of a double concentric circular structure tobacco filter of the present invention, and this core portion has a cross-sectional structure as shown in FIG. 3, which is a fiber material mainly composed of long-fiber crimp tow or a pulp fiber material. Depth d of 0.2 to 2 mm, pitch between waves 0.5 to 3
It is composed of a corrugated sheet having a groove of mm. Wave pitch p of corrugated sheet is 0.5 to 3 mm
The corrugated sheet-like material having a depth d of 0.2 to 2 mm outside of the above range must be folded into a cylindrical shape to form a core. The mixing ratio of the flavor and taste component and the particulate matter in the smoke flow filtered by the corrugated sheet-like material deviates from an appropriate value, and the cigarette filter having a good flavor and taste and capable of appropriately removing the particulate component cannot be obtained.

In FIGS. 1 and 2, reference numeral 2 denotes a cylindrical sheath portion which constitutes the cigarette filter of the present invention. This cylindrical portion opens a fiber material mainly composed of long-fiber crimped tow, and a plasticizer. After spraying an adhesive or an adhesive, it is formed into a cylindrical shape by focusing. In these figures, 3 is a wrapping paper that surrounds the outer circumference of the filter, and 4 is an aperture that has a ventilation effect for taking in the outer air into the filter, if necessary.

The double concentric circular structure composite tobacco filter of the present invention has a good flavor and taste during smoking and an appropriate effect of removing particulate matter in a smoke stream by providing the structure as described above. It has a large first characteristic. First, the core part has a structure in which corrugated fiber material is bundled, so it has a fairly large void despite the large amount of filter fiber material used in the core part. Therefore, the suction resistance of the core part is extremely small, and a cigarette filter with a feeling of smoke can be obtained, and at the same time, the filtering efficiency of particulate components in smoke is considerably high.

Second feature of the cigarette filter of the present invention
Is that the particulate component in the smoke stream can be formed while suppressing the degree of deterioration of the flavor and taste of cigarettes. That is, the smoke flow that has flowed into the sheath of the tobacco filter is first sucked,
Filtering is performed in the axial direction of the filter, and subsequently, by changing the smoke flow in the cross-sectional direction of the sheath portion where the suction resistance of the core portion is low, further filtration is performed, and then it reaches the mouth,
It was possible to improve the filtration efficiency of the particulate component in the smoke stream as compared with the conventionally developed plain filter.

The corrugated molded sheet forming the core portion of the double concentric circular structure tobacco filter of the present invention is made of polyolefin fiber, polyester fiber,
A sheet-like material made of polyamide fiber, cellulose acetate fiber, pulp, etc., as the sheet-like material, which is an opened sheet of long-fiber crimp tow, or a sheet-like material composed of an aggregate of short fibers. A non-woven fabric or the like can be used. In particular, in order to obtain a tobacco filter having a good flavor and taste, it is preferable to use a corrugated molded sheet made of cellulose acetate fiber tow or crepe paper.

The sheath fiber material 2 that surrounds the corrugated sheet fiber material 1 that serves as the core is rayon,
A long fiber crimped tow made of vinylon, polyolefin, cellulose acetate or the like can be used. Considering the flavor and taste which is the object of the present invention, it is preferable to use cellulose acetate fibers. INDUSTRIAL APPLICABILITY The present invention provides a cigarette material for a sheath portion and a core portion by changing the fiber type, changing the fiber thickness, or changing the filling density. It is possible to appropriately adjust the feeling and flavor and taste, and to make a filter that can efficiently remove harmful components contained in cigarette smoke.

A preferred method for producing a tobacco filter of the present invention is to uniformly open a fiber material mainly composed of long-fiber crimped tow, and preferably after uniformly impregnating a plasticizer with the double-cone tube. It is supplied to the outer tube and bundled into a cylindrical shape, the tow-shaped fiber bundle is uniformly opened as a core fiber material in the cylindrical material, and preferably a plastic sheet is uniformly attached with a plasticizer, Alternatively, the pulp fiber molded into a corrugated sheet with a grooved thermoforming roll is fed through the central circular tubular portion of the double conical tube, and can be made by integrating it into a sheath core type, This manufacturing method will be described with reference to FIG.

First, the fiber material 2 for the sheath portion is delivered to the delivery roll 6 in a state where it is uniformly opened by the opening device 5.
With this, preferably, a plasticizer such as triacetin is evenly applied, and thereafter the first ring guide 7 and the second ring guide 8 are passed to gradually expand the cross section into an arc shape and form a tubular shape. It is supplied to the outer tube of the double conical tube 15 and is focused into a cylindrical shape. This ring-shaped guide 7,
By arranging 8 so that the radius becomes gradually smaller, the thickness of the sheath layer of the filter can be made uniform and the shape of the cylindrical body can be made uniform, which is preferable.

On the other hand, when the core fiber material is a material that does not need to be opened, for example, a non-woven fabric or crepe paper, the state as shown in 9 is used.
After passing through 10, the corrugated thermoforming device 13 forms a corrugated sheet. The corrugated thermoforming device 13 is composed of two upper and lower rolls having a large number of processing grooves,
Any device may be used as long as the upper and lower grooves mesh with each other and can be adjusted with a clearance of about 1 mm or less, and can be thermoformed under a predetermined pressure and temperature. The corrugated sheet may be pulled out by the extra roll 14, passed through the ring guides 7 and 8, and then fed to the central circular tubular portion of the double conical tube 15.

When the fiber material for the core portion requires opening like tow, it becomes like 21, and when it is evenly opened by the opening device 11, the deliberry roll 12 is used, preferably a plastic such as triacetin. After the agent is uniformly applied, it is sent to a corrugated thermoforming device 13 and molded into a corrugated sheet. The corrugated sheet is pulled out by the extra roll 14, passed through the ring guides 7 and 8, and then supplied to the central circular tubular portion of the double conical tube 15, and is fed to the central portion of the cylindrical sheath fiber material. Focused and integrated.

At the same time, the wrapping paper 3 supplied to the filter plug machine is coated with an adhesive on at least one end edge thereof, is wrapped around the outer periphery of the sheath core type filter material, and is joined at the end thereof, and then the cutter The double concentric composite tobacco filter of the present invention can be obtained by cutting the tobacco filter into a predetermined length with.

In the manufacturing method of the present invention, the amount of the plasticizer attached to the fiber material, the fiber types of the sheath fiber material and the core fiber material, the fiber thickness, the clearance between rolls of the corrugated thermoforming device 13, the pressure and The temperature, the groove pitch p and the groove depth d of the corrugated sheet shown in FIG. 3 have a great influence on the characteristics of the obtained tobacco filter. It is preferable that the clearance between corrugated rolls is 0.5 mm or less, the pressure between rolls is in the range of 0.5 to 0.6 Kg / cm ² G, and the temperature is in the range of 60 to 180 ° C. The groove pitch p of the corrugated sheet is
It is preferable that the groove depth is 0.5 to 3 mm and the groove depth d is 0.2 to 2 mm. Clearance between rolls of corrugated thermoforming machine
If it exceeds 0.5 mm or if the temperature is lower than 60 ° C, it is difficult to make a corrugated sheet.
On the contrary, when the temperature of the corrugated thermoforming machine exceeds 180 ° C, the sheet is made too much, which makes it difficult to make a filter material with sufficient suction resistance and the manufacturing stability of the corrugated sheet deteriorates. As a result, the performance as a filter material deteriorates, which is not preferable. Further, when the groove pitch p of the corrugated sheet is out of the range of 0.5 to 3 mm and the groove depth d is out of the range of 0.2 to 2 mm, the formability of the fibrous material into the corrugated sheet and the converging property into the rod shape are deteriorated. It is not preferable.

The double concentric circular structure composite filter of the present invention has the characteristic that the flavor and taste can change the taste sensation according to the type of cigarette, and the removal efficiency of the particulate components in the smoke stream is high. Due to the effect of the core member, a cigarette filter having a smoke amount can be obtained.

Hereinafter, the present invention will be described in more detail with reference to Examples.

[0021]

Examples 1 to 4 Using the fiber materials shown in Table 1, the double concentric circular structure composite filter of the present invention was manufactured by the method shown in FIG. The cross section of the corrugated sheet forming the core has a cross section as shown in FIG.
Was 1.0 mm and the depth d was 0.5 mm. The obtained filter had a filter length of 20 mm and a circumference of 24.7 mm, and its cross-sectional shape and vertical section had the structure shown in FIGS. 1 and 3. The cigarette filter produced as described above was connected to one end of a cigarette with an adhesive tape having a width of 18 mm, and a smoking test was conducted under the following smoking conditions. [Smoking conditions] Smoking equipment: Constant flow type Smoking time: 2 seconds / time Smoking interval: 58 seconds Smoking flow rate: 17.5 ml / second Number of smoking times: 7 times / main Mainstream smoke collection method: Cambridge filter CM-113 Number of smoking: 20 analytical methods: Nicotine; UV spectrophotometric method Other compounds; Gas chromatographic method

[Table 1]

From the results shown in Table 1, the double concentric circular structure tobacco filter of the present invention has a high ability to remove harmful components in the tobacco smoke despite having a low ventilation resistance.
Moreover, it can be seen that the aroma and flavor are significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cigarette filter of the present invention.

FIG. 2 is a vertical sectional view of the cigarette filter of the present invention.

FIG. 3 is an enlarged cross-sectional view of a corrugated sheet-like material that constitutes the tobacco filter of the present invention.

FIG. 4 is a schematic view showing a process of making a cigarette filter of the present invention.

[Explanation of symbols] 1 ………… Core fiber material 2 ………… Sheath fiber material 3 ………… Wrapping paper 4 ………… Hole 5 ………… Opening device 6 ………… Deli Berry roll 7 ………… Ring guide 8 ………… Ring guide 9 ………… Pulp fiber material 10 ………… Guide 11 ………… Opening device 12 ………… Deli berry roll 13 ……… Corrugated thermoforming machine 14 ………… Extra roll 15 ………… Double conical tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kitayama 3 Kaigan Dori, Toyama City, Toyama Prefecture Mitsubishi Rayon Co., Ltd. Toyama Plant (72) Inventor Eiichi Takase 3 Kaigan Dori, Toyama City, Toyama Prefecture Mitsubishi Rayon Co., Ltd. Toyama Office

Claims (2)

[Claims] 1. A double concentric tobacco filter, wherein the sheath portion is formed of a long fiber crimped tow in a cylindrical shape.
A double concentric circular structure tobacco filter, wherein the core portion is composed of a fiber material mainly composed of long-fiber crimp tow or a corrugated sheet-like material mainly composed of pulp fiber material. 2. A fiber material mainly consisting of long-fiber crimped tows is uniformly opened, and preferably a plasticizer is evenly attached thereto, and then supplied to an outer tube of a double conical tube to be bundled into a cylindrical shape. Then, a tow-shaped fiber bundle is uniformly opened as a core fiber material in this cylindrical material, preferably a fiber sheet material in which a plasticizer is evenly attached, or a pulp fiber material is thermoformed with a groove. A method for producing a double concentric circular structure tobacco filter, characterized in that a corrugated sheet formed by rolls is fed through a central circular tubular portion of a double conical tube to be integrated into a sheath core type.