JP3524786B2 - Tobacco filter manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cigarette filter manufacturing apparatus. In particular, it is a cigarette filter manufacturing apparatus which has a good airflow resistance exhibiting the performance of the filter, and causes little fly, which is a cut piece of the fiber constituting the filter material, in the winding operation of the filter.

[0002]

2. Description of the Related Art Conventionally, as a material for a tobacco filter, a bundle of crimped fibers such as cellulose acetate or polyolefin, or a sheet of paper or pulp has been put into practical use. Generally, a filter made of cellulose acetate fiber having a better flavor and taste is preferred, and it is used for most tobacco products.

A plug hoist is usually used to manufacture a cigarette filter. In a plug hoist, by pulling a crimped fiber bundle, the single fibers are pulled apart,
After performing the fiber-opening process to a bulky state, the fiber bundle is bundled so as to have a constant diameter. The bundled fiber bundle is formed into a circular rod shape at the winding tube portion, and a winding paper is wound around the outer circumference thereof and cut into a certain length to form a cigarette smoke filter plug (hereinafter referred to as a plug). In such a plug manufacturing apparatus, usually 400 m / min, and further 600 m
High-speed production of / min is possible. A tobacco filter is obtained by further cutting this plug into a predetermined length.

As a method for opening a crimped fiber bundle, the fiber bundle is passed through a roll pair consisting of at least two metal rolls and a hard rubber roll. At this time, the most commonly used method is to stretch the fiber bundle by driving the peripheral speed of the roll pair on the more downstream side to be higher than the peripheral speed of the roll pair on the upstream side. Generally, two pairs of rolls are used to feed the more upstream roll pair,
The downstream roll pair is called a ratio roll. In addition, uneven grooves are formed on the surface of at least one of the metal rolls.

In such a fiber-spreading process, the rate at which the fiber bundle is stretched is one of the important factors that determine the quality of the wound plug, and its adjustment changes the ratio of the peripheral speeds of the two roll pairs. Done by. The ratio of the peripheral speed of the downstream roll and the peripheral speed of the upstream roll is referred to as the opening ratio.

On the other hand, as the tar tar reduction of tobacco products progresses, the demand for tobacco filters having high filtering performance for tobacco smoke is increasing. For this reason, as the material for the filter, a fiber material having a small single fiber fineness, which can further improve the ventilation resistance, which is an index of the filtration performance, has been used.

Using a fiber material having a small single fiber fineness,
In order to stably produce higher airflow resistance, it is important to sufficiently open the crimped fiber bundle in the plug hoist, and by sufficiently opening the fiber bundle, a filter with a uniform structure can be obtained. It becomes possible to obtain.

However, when the single fiber fineness is reduced, the strength of the fiber is reduced, so that the single yarn breakage is likely to occur during the opening process. Fiber pieces generated by single yarn breakage during plug winding work are called "fly" and scatter around the winding machine to contaminate the work environment.

This fly is generated in a larger amount as the monofilament fineness is smaller, and as the proportion of the fiber bundle stretched, that is, the spread ratio is increased. Further, this fly also increases due to an increase in nip pressure of the roll pair of the plug hoist and pretension rolls.

Further, in the plug hoist, a plasticizer is attached to the fiber bundle. This is to increase the hardness of the plug by the plasticizer partially dissolving the surface of the fibers and adhering the fibers to each other. The hardness of a given plug is
It is necessary in order to ensure processability in the subsequent tobacco manufacturing process, and is important from the final quality of tobacco products. When the fly generated in the plug winding operation contains the plasticizer, it is melted and becomes an aggregate. There is a problem that if this is mixed in the product plug, it becomes a defective product called "melting".

Conventionally, in order to suppress the generation of such fly, there has been a method of suppressing the single yarn breakage by lowering the opening ratio in the plug hoisting machine even if the expression of airflow resistance is slightly sacrificed. It is taken. However, a decrease in the opening ratio causes a defective opening of the filter material, which reduces the ventilation resistance of the filter and further reduces the filtering performance for tobacco smoke.

[0012]

DISCLOSURE OF THE INVENTION According to the present invention, the airflow resistance of the plug is excellent even in the work of winding a plug using a fiber material having a small single fiber fineness, and the occurrence of fly is suppressed. An object is to provide a high quality plug hoisting device.

[0013]

SUMMARY OF THE INVENTION The gist of the present invention is to manufacture a tobacco filter in which a filter material having a crimp is stretched and opened between at least two roll pairs to form a rod shape. An apparatus for producing a cigarette filter, wherein at least one roll surface of the roll has concave and convex grooves satisfying the formula (1).

(TD) × (A) / (FD) <4 × 10 ⁴ (1) However, (A) is the pitch (mm) of the concave and convex grooves on the roll surface, and (FD) is the filter material. The single fiber fineness (dtex) and (TD) of a fiber are the total fineness (dtex).

The inventors of the present invention appropriately set the concave and convex grooves in the opening roll of the plug hoisting machine according to the single fiber fineness of the fiber bundle used as the filter material, thereby exhibiting ventilation resistance. Therefore, the inventors have found that the above is favorable and the amount of fly generation is suppressed, and have completed the present invention.

The present inventors have found that in a plug hoist,
The fiber bundle that is stretched between at least two sets of opening rolls is stretched as a whole due to the difference in the peripheral speed of the roll pair. I noticed that I was blown away.

That is, in the uneven groove of the roll, the fiber bundle located in the convex portion is gripped by the roll pair, but the fiber located in the concave portion in the vicinity thereof is not gripped. Therefore, when the fiber bundle is stretched between at least two pairs of rolls, the stretched ratio is slightly different between the gripped portion and the non-grasped portion. It will be overlooked. This fine stretching is added to the fiber bundles in the course of the grooves of the roll.

On the other hand, the number of fibers constituting a fiber bundle having a small single fiber fineness, which has come to be used along with the reduction in tar content of tobacco products, is increasing.

The inventors of the present invention appropriately set the concavo-convex groove in the opening roll of the plug hoisting machine according to the single fiber fineness of the fiber bundle used as the filter material, and thereby the above-mentioned fine stretching is performed. It has been found that it is possible to more effectively express the above, the ventilation resistance of the wound plug is improved, and the amount of fly generation is suppressed.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION On the surface of the roll of the present invention, (1)
It is characterized in that there are uneven grooves that satisfy the formula. (TD) × (A) / (FD) <4 × 10 ⁴ · (1) The total fineness of the filter material (TD) and the single fiber fineness (F
The ratio with D) indicates the number of constituent fibers. That is,
Equation (1) is calculated according to the number of filter materials.
It is intended to adjust the pitch of the roll grooves.

When the number of fibers is increased, the pitch of the grooves is reduced to increase the number of finely stretched portions between the convex portions and the concave portions of the concave and convex grooves to improve the effect of fiber opening. is there.

Examples of the filter material include crimped fiber bundles made of rayon, vinylon fiber, polyolefin fiber, cellulose acetate fiber and the like, and polyolefin fiber and cellulose acetate fiber are preferably used.

Further, when a fine denier fiber bundle having a single fiber fineness of 2.5 (dtex) or less is used as the filter material, or when the number of fiber bundles is 20,000 or more, the present invention is used. The cigarette filter manufacturing device is effective.

In the present invention, examples of the fiber-opening roll through which the filter material passes include a pretension roll, a feed roll and a ratio roll.

Further, it is preferable that the roll having concave and convex grooves satisfying the expression (1) further satisfies the expression (2). 0.4 <(B) / (A) <0.95 ... (2) where (A) is the pitch (mm) of the concave and convex grooves on the roll surface, and (B) is the width of the convex portion of the roll groove. (Mm).

The roll satisfying the formula (2) is preferably an upstream roll, for example, a feed roll.
When this (B) / (A) exceeds 0.95, the fiber bundle is likely to stick to the roll under high-speed plug winding conditions. On the other hand, when it is less than 0.4, the grasping of the fiber bundle by the roll pair is reduced, and the fiber cannot be sufficiently opened.

At this time, the pitch of the concave and convex grooves on the surface of the roll is preferably 1.5 mm or less because the fiber bundle is more finely stretched.

An example of the plug hoisting device of the present invention is shown in FIG. An example of the groove shape of the opening roll is shown in FIG.

[0029]

The present invention will be described in more detail with reference to the following examples. Each measurement item in the examples was based on the following method.

<Ventilation resistance> The ventilation resistance of the plug was measured by the Cholesta method.

<Fly> Regarding the fly generated in the plug winding operation, when the plug winding was continuously performed for 1 hour, the fly attached to the periphery of the opening roll was collected and its weight was measured.

(Examples 1 and 2) High-speed plug hoist, KD
Single fiber fineness of 1.7 (dtex) and total fineness of 49,000 (d
6% (by weight) of triacetin is attached using a cellulose acetate fiber bundle of (tex) as a plasticizer, and the circumference is 24.2.
(Mm), length 120 (mm), and the filling amount of the fiber bundle is 0.
It was wound up into a 72 (g / rod) plug. At this time, A
As the roll on the upstream side of the opening roll part of F-3, which has the grooves shown in Table 1, the roll on the downstream side has a groove pitch of 1.3 (mm) and a width / pitch ratio of the protrusions. A roll having a groove of 0.3 was used. The opening ratio, which is the ratio of the peripheral speed of the opening roll, was changed from 1.3 to 1.85, the plug was wound up, and the ventilation resistance was measured. The results are shown in Table 1.

(Comparative Example 1) A plug was wound in the same manner as in Example 1 except that the roll having the groove shown in Table 1 was used as the roll on the upstream side of the opening roll portion of AF-3. The ventilation resistance of the plug is shown in Table 1.

(Examples 3 and 4) High speed plug hoist, KD
Single fiber fineness of 1.7 (dtex) and total fineness of 49,000 (d) using F-3 / AF-3 (manufactured by Hauni, Germany)
6% (by weight) of triacetin is attached using a cellulose acetate fiber bundle of (tex) as a plasticizer, and the circumference is 24.2.
(Mm), length 120 (mm), and the filling amount of the fiber bundle is 0.
It was wound up into a 72 (g / rod) plug. At this time, A
As the roll on the upstream side of the opening roll portion of F-3, the roll having the grooves shown in Table 2 was used, and as the roll on the downstream side, the groove pitch was 1.3 (mm), and the width / pitch ratio of the convex portions was A roll having a groove of 0.3 was used. The opening ratio was adjusted so that the ventilation resistance of the wound plug was 730 (mmH2O). At that time, Table 2 shows the results of evaluation of the amount of fly generated.

(Comparative Example 2) A plug was wound in the same manner as in Example 3 except that the roll having the groove shown in Table 2 was used as the roll on the upstream side of the opening roll portion of AF-3.
At that time, Table 2 shows the results of evaluation of the amount of fly generated.

(Examples 5 and 6) Single fiber fineness 2.1 (dt)
ex), a plug was prepared in the same manner as in Examples 1 and 2 except that a cellulose acetate fiber bundle having a total fineness of 49,000 (dtex) was used. The ventilation resistance of the obtained plug is shown in Table 3.

(Comparative Example 3) A plug was wound in the same manner as in Example 5 except that the roll having the groove shown in Table 3 was used as the roll on the upstream side of the opening roll portion of AF-3. Table 3 shows the ventilation resistance of the plug at this time.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

[Table 3]

[0041]

The cigarette filter manufacturing apparatus of the present invention comprises:
It is a device that can produce a high-quality plug with good airflow resistance expression of the plug and little fly generation.

[Brief description of drawings]

FIG. 1 is a diagram of an example of a plug hoisting device of the present invention.

FIG. 2 is a diagram showing an example of the groove shape of the fiber-spreading roll of the present invention.

[Explanation of symbols]

1 Filter material 2 First banding jet 3 Second Banding Jet 4 Pretension roll 5-1 Feed roll (upstream side roll of fiber opening processing section) 5-2 Ratio roll (roll on the downstream side of the fiber opening processing part) 6 third banding jet 7 Plasticizer addition device 8 feeding rolls 9 Air jet 10 Trumpet Guide 11 tongs 12 garnish 13 garniture belt 14 roll paper 15 Cutting device 16 groove pitch 17 Width of groove protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-38145 (JP, A) JP-A-48-48698 (JP, A) JP-A-56-35977 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A24D 3/02 A24D 3/04

Claims (8)

(57) [Claims] 1. Between at least two or more roll pairs,
An apparatus for producing a tobacco filter, in which a filter material having a crimp is stretched to perform a fiber-spreading process, and formed into a rod shape, and at least one roll surface of the roll is,
An apparatus for manufacturing a cigarette filter, characterized in that it has concave and convex grooves satisfying the formula (1). (TD) × (A) / (FD) <4 × 10 ⁴ ··· (1) However, (A) is the pitch (mm) of the concave and convex grooves on the roll surface, and (FD) is the fiber of the filter material. Single fiber fineness (dtex) and (TD) are total fineness (dtex). 2. The cigarette filter manufacturing apparatus according to claim 1, wherein the roll having the concave and convex grooves satisfying the formula (1) further satisfies the formula (2). 0.4 <(B) / (A) <0.95 ... (2) where (A) is the pitch (mm) of the concave and convex grooves on the roll surface, and (B) is the width of the convex portion of the roll groove. (Mm). 3. The cigarette filter manufacturing apparatus according to claim 1, wherein the roll having the concave and convex grooves satisfying the formula (1) or the formulas (1) and (2) is the roll on the upstream side. 4. The pitch of the concave and convex grooves on the surface of the roll is
The tobacco filter manufacturing apparatus according to any one of claims 1 to 3, which has a thickness of 1.5 mm or less. 5. The roll having an uneven groove is a pretension roll, a feed roll or a ratio roll.
[4] The cigarette filter manufacturing apparatus according to any one of [4]. 6. The number of components as a filter material is 200
The tobacco filter manufacturing apparatus according to any one of claims 1 to 5, which uses 00 or more fibers. 7. A filter material having a single fiber fineness of 2.
The tobacco filter manufacturing apparatus according to any one of claims 1 to 6, which uses fibers of 5 (dtex) or less. 8. A cellulose ester or polyolefin is used as the filter material.
The cigarette filter manufacturing apparatus according to any one of claims 1.