JP2007000019A - Tobacco filter manufacturing method - Google Patents

Abstract

[PROBLEMS] To manufacture a cigarette filter in which, when converging the cigarette filter, the gap formed by the grooved portion is not crushed when the outer periphery of the cigarette filter is wrapped up with a grooved tape, and the forming speed is improved. Provide law.
When a filter material 3 in a core portion is opened by a filter plug machine 4 and then converged into a circular rod shape, the outer circumference thereof has an elongation in the width direction of 14 to 20% and a tensile strength in the longitudinal direction. A method for producing a cigarette filter in which the whole is wound up with a web 8 while being wrapped up with a tape 6 grooved in a paper tape 1 of 3 kN / m or more.
[Selection] Figure 1

Description

  The present invention relates to a method for producing a tobacco filter excellent in taste and design.

Tobacco filters are required to have both the ability to filter cigarette smoke and the satisfaction of smokers. In order to satisfy such requirements, the diluted air flowing in from the ventilation holes on the side of the filter and the cigarette smoke passing through the filter are separated and guided into the mouth of the smoker to prevent the taste from diminishing. Filters are known.
For example, Patent Document 1 has a core portion and a grooved tape provided around the core portion, and a winding paper provided around the tape, and a longitudinal direction of the filter is provided between the tape and the winding paper. A cigarette filter is described that includes a filter element in which a communicating void is formed.

JP 2001-120249 A

  Such a filter, after opening the filter material of the core part with a filter plug machine, winds up the entire circumference with a wrapping paper while winding the outer periphery so as to wrap it with a grooved tape when converging into a circular rod shape However, it is difficult to increase the molding speed because the gap formed by the concavo-convex shape that is grooved easily collapses, and the tape surface tears, and the separation of diluted air and tobacco smoke tends to be incomplete. Met.

  The gist of the present invention is that when the filter material of the core part is opened by a filter plug machine and then converged into a circular rod shape, the outer circumference has an elongation of 14 to 20% in the width direction and the tensile strength in the longitudinal direction. Is a cigarette filter manufacturing method in which the whole is wound up with a paper roll while being wrapped up with a tape grooved in a paper of 3 kN / m or more.

  The present invention can produce a cigarette filter excellent in taste and design properties at a molding speed of 48 to 80 m / min, without crushing the gap between the grooved tape and the web, and communicating in the longitudinal direction of the filter. Excellent tobacco filter productivity.

The method for producing the tobacco filter of the present invention will be described with reference to FIG. FIG. 1 is a process diagram showing a method for producing a cigarette filter of the present invention.
A paper tape 1 having a predetermined width is drawn out from a roll and passed through a grooved forming roll 2 to be grooved. The forming roll 2 is composed of two upper and lower nip rolls having a plurality of grooves, and the upper and lower grooves formed on the two roll surfaces mesh with each other, and the clearance can be adjusted to a groove depth of about 1 mm or less. And what is necessary is just to have the function to pressurize with predetermined pressure, and the function to heat-mold at predetermined temperature.

  In the present invention, it is necessary that the elongation in the width direction of the paper tape to be grooved is 14 to 20%. When the elongation is less than 14%, a tear occurs on the surface of the tape due to the pressure during grooving. Moreover, when elongation exceeds 20%, when it is set as a filter, it becomes difficult to focus on a circular rod shape.

  Furthermore, in the present invention, it is necessary that the tensile strength in the longitudinal direction of the paper tape is 3 kN / m or more. When the tensile strength is less than 3 kN / m, the tape may break when nipped by the forming roll as the production speed increases.

Furthermore, the paper tape used in the present invention is preferably a paper tape that can be easily thermoformed without a plasticizer.
Examples of such paper include a product name “WAVYWAVY” manufactured by Nippon Paper Industries Co., Ltd.
On the other hand, the core filter material 3 made of cellulose acetate tow is uniformly opened by the opening device 4 of the filter plug machine. More preferably, a plasticizer such as triacetin is attached and supplied into the conical tube 5. At the same time, the grooved paper tape 6 described above is supplied to the filter plug machine while converging so as to wrap the opened filter material 7.

  In the filter plug machine, an adhesive is applied to at least one edge of the web 8, and the outer periphery of the grooved paper tape 6 that wraps the opened filter material 7 is further wrapped in a rod shape while being integrated as a roll-up filter. It becomes. Then, it cut | disconnects to predetermined length with a cutter, and is set as a filter.

The following examples further illustrate the present invention. In addition, each measurement item in an Example depended on the following method.
(Basis weight)
The basis weight of the sheet (paper tape) was measured based on JIS P8124.
(thickness)
The thickness of the sheet (paper tape) was measured based on JIS P8118.
(Tensile strength, tensile elongation)
The tensile strength and tensile elongation of the sheet (paper tape) were measured based on JIS P8113.

[Examples 1 and 2]
Made by Nippon Paper Industries Co., Ltd., paper, product name “WAVYWAVY” (tensile elongation in the width direction: 17%, tensile strength in the longitudinal direction: 8 kN / m) A tape 6 with a groove pitch of 0.9 mm and a groove height of 0.5 mm was made by passing it through a heating roll, and after opening the fiber, a single fiber fineness of 2.1 dtex with triacetin attached, a total fineness of 48, After wrapping around the 400 dtex cellulose acetate fiber tow 7, a filter plug having a structure of 24.2 mm in circumference and 120 mm in length having a structure shown in FIG. Example 1) and 80 m / min (Example 2). As shown in FIG. 2, the end face of the filter obtained in this example is clearly formed with voids 9 formed by the concavo-convex shape formed by grooving, and the surface of the tape is uniform without any tears or the like. It was a proper molding state. Table 1 shows the physical properties, manufacturing conditions, and filter appearance evaluation results of the paper tape used.

(Comparative Example 1)
A crepe paper made by Nippon Paperboard Co., Ltd. (tensile elongation in the width direction: 8%, tensile strength in the longitudinal direction: 1.1 kN / m) is passed through a heating roll for groove processing and a groove pitch. Cellulose acetate fiber tow 7 having a single fiber fineness of 2.1 dtex and a total fineness of 48,400 dtex, prepared by creating a grooved tape 6 having a height of 0.9 mm and a groove height of 0.5 mm, and triacetin is applied after opening. Then, the filter plug having the structure shown in FIG. 2 and having a circumference of 24.2 mm and a length of 120 mm was manufactured at a molding speed of 48 m / min. On the end face of the obtained filter, the gap 9 formed by the concavo-convex shape formed by grooving was crushed, and a tear occurred on the tape surface, resulting in a poorly molded state. Table 1 summarizes the physical properties, production conditions, and filter appearance evaluation results of the tapes used.

(Comparative Example 2)
The conditions for using the grooved processed tape obtained in the same manner as in Comparative Example 1 in Comparative Example 1, except that an attempt was made to manufacture a filter plug at a processing speed of 80 m / min. could not. Table 1 shows the physical properties of the tapes used and the results of filter appearance evaluation.

外観評価：○は空隙部がつぶれ又は変形がないもの、×は空隙部がつぶれもしくは変形していることを示す。

Appearance evaluation: ○ indicates that the void is not crushed or deformed, and x indicates that the void is crushed or deformed.

It is process drawing which shows an example of the manufacturing method of the tobacco filter of this invention. It is sectional drawing of the tobacco filter of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tape 2 Forming roll 3 Filter material 4 Opening device 5 Conical tube 6 Grooved tape 7 Opened filter material 8 Winding paper 9 Gap

Claims (2)

  After opening the filter material of the core with a filter plug machine, when concentrating into a rod shape, the outer circumference has an elongation of 14 to 20% in the width direction and a tensile strength in the longitudinal direction of 3 kN / m or more. A method for producing a cigarette filter that is rolled up by wrapping paper while being wrapped up with tape grooved into paper. 2. The method for producing a tobacco filter according to claim 1, wherein the molding speed is 48 to 80 m / min.

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