KR101506628B1 - air permeable filter of cigarette and method for manufacturing thereof - Google Patents

Abstract

Provided is a functional filter for effectively reducing harmful components in cigarette smoke and reducing the smell of cigarette smoke. To improve the productivity and quality of the filter, the present invention provides a method for producing an air permeable cigarette filter, wherein the method comprises a first step of preparing and elongating a filter tow; a second step of calcining the elongated tow; a third step of dispersing and feeding the calcined tow respectively to a first feeding hole formed in a circular cross section shape to constitute a core unit and a second feeding hole formed to be compartmentalized in the outside of the first feeding hole; a fourth step of respectively pressing the dispersed and fed tow in a first narrow pipe unit connected with the first feeding hole and a second narrow pipe unit connected with the second feeding hole to be divided and injected into a first discharging hole connected with the first narrow pipe unit and a second discharging hole connected with the second narrow pipe unit; a fifth step of feeding a tow injected in the second discharging hole into a mold having a concave-convex groove part formed on the inner circumference thereof to constitute a ventilation unit having a ventilation path formed along the outer circumference thereof and producing a filter by overlapping the core unit and ventilation unit in a junction unit where the mold and first discharging hole are joined; and a sixth step of adhering filter wrapping paper in a circumferential direction along the circumference of the produced filter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cigarette filter,

The present invention relates to a breathable cigarette filter and a method of manufacturing the same. More particularly, the present invention relates to a functional filter that improves harmful components in cigarette smoke and improves the flavor inherent in cigarette smoke, Permeable cigarette filter and a method of manufacturing the same.

Generally, a cigarette is wrapped around a cigarette paper, such as a tobacco cigarette, and the cigarette paper and the tobacco are burned to suck the generated smoke. A filter is installed in the suction portion to improve the taste of smoke and smoke.

In detail, the cigarette paper can be made of flax or wood pulp with paper cutting the tobacco part. A filter is provided at the rear portion of the tobacco wrapped with the cigarette paper to suck the smoker's mouth.

Here, the filter is classified into an acetate filter, a paper filter, a charcoal filter, and the like depending on the material, and a mono filter, a dual filter, , And a triple filter (triple filter).

At this time, the filter prevents the tobacco from touching the tip of the tongue of the smoker, and a filter wrapper is provided on the outer circumference of the filter. Here, the filter wrapper may be formed of a thin paper to maintain the shape of the filter.

The cigarette paper and the filter are connected by a tipping paper, and fine pores are formed in the tip papers.

In recent years, smokers' taste has been changing from high tar to low tar. In order to reduce the amount of tar absorbed by the human body, the filter is made of fine fibers to maintain the original flavor of the cigarette, I am using the method.

On the other hand, conventionally, in order to form a ventilation hole on the outer circumference side of the filter, a ventilation portion is formed by a hard paper folded in a concavo-convex shape on the outer periphery of the core filter serving as a center and a ventilation hole is formed by wrapping the filter paper on the outside of the ventilation portion .

However, the conventional ventilation portion has a problem that the ventilation hole is easily erased due to the restoring force of the filter and the flexibility of the paper itself. That is, the ventilation portion surrounding the outer periphery of the elastic filter is pressed outward due to the restoring force of the filter, and the concave / convex shape is often opened, and the ventilation hole between the ventilation portion and the filter paper becomes small or disappear.

As described above, since the vent hole formed through the vent portion is not easily manufactured in the size or shape originally designed, the vent hole is changed differently from the original design over time even in the manufactured state, The inherent flavor of the tobacco is deteriorated.

In addition, after the production of the filter, the productivity is lowered due to complicated processes such as application of the adhesive material, adhesion of the air-permeable portions formed by the irregularities, and attachment of the filter wrapping paper, and the adhesion between the filter and the air- There was a problem that could not be supported.

As a result, there has been a serious problem that the filtration performance of the filter is not exhibited properly or the smoke flows between the vent portion and the filter. In addition, there is a problem that the adhesive, applied between the filter and the vent, and between the vent and the filter wrapper is easily deteriorated and denatured due to heat and moisture in the mouth, thereby easily separating the filter, the vent and the filter wrapper.

Korean Patent Publication No. 10-2004-0097355

In order to solve the above-mentioned problems, the present invention provides a functional filter for improving harmful components in tobacco smoke and improving the flavor inherent in tobacco smoke, wherein the filter is improved in productivity and quality, And the like.

In order to solve the above problems, the present invention provides a method for preparing a tow for a filter, A second step of subjecting the drawn tow to a plasticizing treatment; A third step of dispersing and injecting the plasticized tow in each of a first injection port having a circular cross section to form a core part and a second injection port partitioned outside the first injection port; Each of the dispersed injected tows is pressurized by a first squeezing part connected to the first injection port and a second squeezing part connected to the second squeeze port and connected to the first squeezing part and the first squeezing part connected to the second squeezing part A fourth step of dividing into a second outlet and injecting; Wherein the air outlet is formed in the outer periphery of the air outlet, and the air outlet is formed along the outer periphery of the air outlet. In the merging portion where the forming die and the first outlet are merged, And a fifth step of fabricating a filter by superimposing the vent portion; And a sixth step of attaching the filter wrapper in the circumferential direction along the outer periphery of the manufactured filter.

Here, the second injection port may have a larger cross-sectional area than the first injection port so that the tow introduced into the second injection port may have a higher compression ratio in the third step, and in the fourth step, It is desirable to have a lower durability consumption than that of the narrowed portion.

The fifth step may include a step of steam-heating the forming mold so that the tow contacted with the recessed groove portion has a higher curing rate than the tow flowing to the first outlet.

The fifth step includes cooling the produced filter with compressed air, and cutting the cooled filter to a predetermined length, and the sixth step is a step of cutting the manufactured filter into a prepared functional And combining the filter with a filter.

On the other hand, the filter tow is formed at a low density by coagulation with a low compression ratio and has a core portion disposed at the center portion; Wherein the filter tow is formed at a high density so as to be aggregated at a high compression ratio and is arranged so as to surround the outside of the core portion and has a plurality of ventilation passages in the longitudinal direction along the circumferential direction; And a filter wrapping around the outside of the ventilation portion.

Through the above solution, the present invention provides the following effects.

First, since the ventilation part is formed into a shape that is formed in the recessed and recessed groove part of the molding die according to the elastic restoring force after compression, the diameter and the shape of the ventilation flow passage designed in consideration of the ventilation rate of the core part and the filter wrapping paper are accurately realized, And is pressurized at the second narrowing portion to be agglomerated at a high density, and is brought into contact with the heated mold frame and hardened, so that the ventilation channel can be firmly maintained even when the filter wrapping paper is packed.

Second, the core part is injected at a low density through the first injection port so as to maximize the contact area with the smoke, thereby improving the filtering performance. The core part can maintain a constant suction resistance through the high density vent part formed on the outside, A synergy effect of improving the flavor of the cigarette can be provided by mixing the filtered outside air with the filtering smoke.

Thirdly, since the ventilation portion is cured in a state where it is confined to the inner periphery of the ventilation portion after the ventilation portion is cured according to the shape of the molding die, the ventilation portion can have an accurate ventilation rate without changing the density due to restoration expansion of the material itself. It is possible to precisely manufacture the core portion of the filter and the filter with the standard corresponding to the diameter of the tobacco of the designed cigarette, thereby improving the quality of the product.

Fourth, since the core portion and the ventilation portion are compressed through the narrowed portion provided in each injection portion and each injection portion so as to be differentiated at a density suitable for the application, the ventilation flow path is formed in the molding die, Since the core part is formed, a filter having a multi-structure along one processing line can be manufactured accurately and easily, and productivity and quality of the product can be improved.

1 is a flow diagram illustrating a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a process for producing a breathable cigarette filter.
3 is a view illustrating an injection molding machine in which a first injection port and a second injection port are formed in a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention.
4 is a view showing an example of a mold in a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention.
FIG. 5 is an exemplary view showing a breathable cigarette filter according to an embodiment of the present invention; FIG.
FIG. 6 is an exemplary view showing a combined state of a breathable cigarette filter and another functional filter according to an embodiment of the present invention; FIG.

Hereinafter, a breathable cigarette filter according to a preferred embodiment of the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention. FIG. 2 is a view illustrating a process of applying a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention. FIG. 4 is a view illustrating a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention. FIG. 4 is a view illustrating a method of manufacturing a breathable cigarette filter according to an embodiment of the present invention. FIG. 5 is an exemplary view showing a breathable cigarette filter according to an embodiment of the present invention, and FIG. 6 is a view illustrating a state in which a breathable cigarette filter according to an embodiment of the present invention is coupled with another functional filter according to an embodiment of the present invention. Fig.

As shown in FIGS. 1 to 6, a method of manufacturing a breathable cigarette filter according to a preferred embodiment of the present invention includes a step (s10) of preparing and drawing a filter tow, a step of plasticizing the drawn tow s20), dispersing and injecting the plasticized tow into a first injection port having a circular cross-section to form a core portion and a second injection port partitioned outside the first injection port (s30) Each of the tows being pressurized by a first squeezing portion connected to the first inlet and a second squeezing portion connected to the second squeezing portion to form a first outlet connected to the first squeezing portion and a second outlet connected to the second squeezing portion, (S40), injecting the tow injected into the second outlet into a mold having a recessed groove portion formed on its inner periphery to form a vent portion having an air flow passage formed along the outer periphery thereof, (S50) of overlapping the core portion and the vent portion at a merging portion where the frame and the first outlet are merged, a step (s50) of attaching the filter paper in the circumferential direction along the outer periphery of the manufactured filter ).

First, the filter tow (t) may be a filament formed of semisynthetic fibers such as cellulose acetate, compressed and bound in the form of a bag, have.

The filter tow (t) can be taken out from the supply unit 10 and introduced into the stretching machine 11 (s10). At this time, the stretching machine 11 has a pair of first rolls arranged in a spiral or circumferential groove along the outer circumference and arranged vertically and in contact with the outer periphery thereof, and a pair of second rolls arranged in front of the first roll, Roll.

Here, the tow passes between the first rolls and between the second rolls, and may be transported aligned along the grooves of the first roll and the second roll by the short fibers. At this time, it is preferable that the rotation speed of the second roll is faster than the rotation speed of the first roll.

Thus, the tow may be stretched due to the difference in rotation speed between the first roll and the second roll, and a twist may be formed in each of the short fibers passing through the second roll, and the degree of twist of the short fibers The ventilation rate of the manufactured filter can be adjusted.

Then, the tow passing through the stretching machine 11 (s10) is spread through the band machine 12 and can be introduced into the plasticizer 13 in a state where the contact area per single fiber is maximized (s20). At this time, the tow injected into the plasticizer 13 can be plasticized through an organic ester-based plasticizer such as triacetin.

Of course, it is also possible to use dimethyl ether such as triethyl citrate, dimethyl ethyl phthalate, triethylene, tetraethylene glycol and the like as the plasticizer.

Here, the plasticizer 13 can supply a plasticizer to the tow through a spraying device, a brush, etc., and the tow is injected into the plasticizer 13 in a state where the contact area is maximized through the band device 13 Each of the short fibers can be uniformly subjected to the calcining treatment.

Then, the plasticized tow passes through the guide roller 14 and the band width can be reduced. That is, the tow is widely spread to facilitate plasticizing treatment through the band machine 13, and after the plasticizing treatment, the tow can be agglomerated through the guide roller 14 so as to be easily injected into the injector 15.

2 to 3, the plasticized tow is injected into the injector 15 (s30). The injector 15 includes a first injection port 15a and a second injection port 15b through which the tow is injected, a first narrow pipe part 15c connected to the first injection port 15a, and a second injection port 15b, A first outlet 15e connected to the first shedding part 15c and a second outlet 15f connected to the second shedding part 15d.

At this time, the injector 15 can inject the tows injected into the injection ports 15a and 15b through the pneumatic pressure toward the respective outlets 15e and 15f.

In detail, the first injection port 15a is formed in a circular cross-section so as to form a core portion 140. A second injection port 15b, which is separated from the first injection port 15a, is formed on the outer peripheral side of the first injection port 15a. . At this time, the plasticized tow may be dispersed and injected (s30) into the first injection port 15a and the second injection port 15b, respectively.

The tow t1 injected into the first injection port 15a and the tow t2 injected into the second injection port 15b are guided by narrowing portions 15c and 15d connected to the rear of the injection ports 15a and 15b, Lt; / RTI >

In detail, the narrowed portions 15c and 15d connected to the respective injection ports 15a and 15b are formed in a shape in which the diameter is narrowed along the advancing direction of the tow so that the injected tow is compressed. Here, it can be understood that the side on which the tow is injected in the tow advancing direction is forward and the side on which the tow is exhausted is rearward.

That is, the narrowed portions 15c and 15d may have a wide front portion connected to each of the injection ports 15a and 15b and a narrower front portion toward the rear portion. Each of the first and second narrow tube portions 15c and 15d is partitioned and each outlet 15e and 15f is connected to the rear of each of the narrow tube portions 15c and 15d, 15e, 15f are connected to the mold 16.

At this time, the tow t1 injected into the first injection port 15a is pushed by the first narrow pipe part 15c and is injected into the first exhaust port 15e, and the tow injected into the second injection port 15b t2 is pushed by the second shedding portion 15d and is injected into the second outlet 15f (s40).

The first and second outlets 15e and 15f are connected to the mold 16 in a state where they are partitioned from each other and the toe flowing to the outlets 15e and 15f is partitioned, (Not shown).

Accordingly, the tows t1 and t2 injected into the respective injection ports 15a and 15b can be pressurized while being separated from each other, and independently pressurized tows t1 and t2 are separated from each other, Lt; / RTI >

2 to 4, the tow injected into the second outlet 15f is injected into a mold 16 having an inner circumferential recessed groove 16a (s50).

The inner diameter of the molding die 16 is preferably larger than the inner diameter of the second outlet 15f and the toe discharged to the second outlet 15f can be easily introduced into the molding die 16 Can be injected.

The tow injected into the mold 16 may be expanded by the restoring force in a compressed state and may be closely attached to the inside of the recessed groove portion 16a. At this time, the ventilation part 130 disposed on the outer circumferential side of each tow has an outer profile that comes into contact with the recessed groove part 16a and is formed into the recessed groove part 16a.

In detail, the recessed groove portion 16a is formed along the longitudinal direction of the forming die 16, and the inner periphery of the forming die 16 is circumferentially concaved and convex. A plurality of ventilation flow paths 120 may be formed in the ventilation part 130 in the circumferential direction on the outer circumference of the ventilation part 130.

The first outlet 15e extends along the inside of the second outlet 15f and passes through a central portion of the forming die 16 to join the forming die 16 at the merging portion 16c.

Here, the merging portion 16c is preferably understood to mean a point beyond the end of the first outlet 15e extending along the inside of the second outlet 15f having a large diameter.

That is, the tow t2 flowing along the second outlet 15f is formed into the vent 130 between the recessed groove portion 16a of the forming die 16 and the outer periphery of the first outlet 15e And the core portion 140 and the vent portion 130 may be overlapped with each other at the confluence portion 16c to form a filter (s50).

Then, the manufactured filter 100 is put into the packing machine 19, and the filter wrapper 110 can be attached to the outer circumference of the filter in the circumferential direction inside the packing machine (s60).

Since the ventilation part 130 can have the ventilation passage 120 having a shape that is formed in the shape of the recessed groove part 16a in close contact with the molding die 16 in accordance with the elastic restoring force, And the filter paper wrapper 110, it is possible to provide a high-quality filter that maximizes the flavor of the cigarette.

A toe t2 flowing along the outer periphery of the first outlet 15e and between the forming molds 16 and formed into the venting portion 130 flows along the first outlet 15e, Since the tows t1 formed at the center of the base 130 and formed by the core portion 140 are manufactured in a state in which they are partitioned from each other,

3, in the step (s30) in which the plasticized tow is dispersed in the first injection port 15a and the second injection port 15b, the tow (s) introduced into the second injection port 15b it is preferable that the second injection port 15b has a larger cross-sectional area than the first injection port 15a so that the second injection port 15b has a higher compression ratio.

In addition, in step s40 of pressing the tows injected into the respective injection ports 15a and 15b, the second narrowed pipe section 15d preferably has a lower internal consumption reduction than the first narrowed pipe section 15c .

In detail, the first injection port 15a is disposed at the center of the second injection port 15b and has a circular cross-section that is partitioned from the second injection port 15b, And has a donut-shaped cross section surrounding the outer periphery of the first injection port 15a.

Since the cross-sectional area of the second injection port 15b is larger than that of the first injection port 15a, the amount of fibers of the tow t2 injected into the second injection port 15b is larger than that of the tow injected into the first injection port 15a. (t2).

The tows t1 and t2 injected into the respective injection ports 15a and 15b can be moved to the narrowed portions 15c and 15d of the respective injection ports by pneumatic pressure. At this time, each of the narrow tube portions 15c and 15d has a smaller inner diameter from the front portion to the rear portion, and the tow flowing along the inside of the narrow tube portions 15c and 15d may be compressed and agglomerated.

That is, the inner diameter of the portion where the tow is injected and the portion where the tow is exhausted is changed by each of the narrow tubular portions 15c and 15d, and the tow in the narrowed portion can be compressed by the change of the sectional area according to the inner diameter change.

Here, the term "reduction in consumption" means a ratio of the inner diameter difference between the wide portion connected to each inlet and the narrow portion connected to each outlet in each of the narrowed portions, and the higher the inner diameter reduction ratio means the larger the inner diameter difference And the higher the inner diameter reduction ratio, the more the compression ratio of the tow can be increased.

For example, if the diameter of the wide part in the second narrowed part 15d is 10, the diameter of the narrow part is 5, the reduction in consumption is 2: 1, and the diameter of the wide part in the first narrowed part 15c is 6 and the diameter of the narrow part is 4, the internal relief consumption is 1.5: 1.

A large amount of tow is injected into the second injection port 15b to aggregate at a high compression ratio to form a ventilation part 130 at a high density. A small amount of tow is injected into the first injection port 15a, So that the core portion 140 can be formed with low density.

Accordingly, a large amount of tow injected through the second injection port 15b is condensed at a high compression ratio to be formed at a high density. Since the air is hardened by contacting with the heated forming mold, the concave and convex groove portions 16a, The ventilation flow path 120 provided in a shape that is capable of being firmly held can be stably maintained without deforming the shape of the ventilation flow path 120 even when the filter wrapping paper is packed on the outside.

In addition, since the small amount of tow injected through the first injection port 15a is formed at a low density in the core portion 140 with a low compression ratio, the contact area with the cigarette smoke is maximized and the filtering performance can be improved.

Further, since the core portion 140 is precisely partitioned with the ventilation flow path 120 through the high density vent portion 130 formed on the outside, the smoke generated in the tobacco inhalation of the smoker can easily flow through the core portion 140 . That is, it is possible to prevent the suction resistance for sucking the smoke from being excessively increased due to the ventilation flow path 120.

The smoke filtered through the core 140 may be sucked into the oral cavity of the smoker together with the external air introduced through the ventilation channel 120 and mixed.

At this time, since the shape of the ventilation channel 120 can be stably maintained without being deformed by the smoking force of the smoker, the humidity in the mouth cavity, the packaging pressure by the filter wrapping paper, etc., The mixing ratio between the external air sucked in the ventilation passage 120 and the filtered smoke can be stably maintained to improve the flavor of the cigarette.

That is, since the contact area of the core 140 with the smoke is increased by the low density injection, the filtering performance is improved and the ventilation channel 120 through which the outside air is introduced is firmly maintained, It is possible to provide a synergy effect to improve it.

4, the step (s50) of injecting the tow injected to the second outlet 15f into the molding die 16 is performed by the tow which is in contact with the recessed groove portion 16a, And heating the mold frame 16 to have a higher curing rate than the tow flowing into the mold 15e.

Here, the first outlet 15e may be formed to extend to the merging portion 16c along the center of the forming die 16.

A steam supply pipe 16b is provided at an upper portion and a lower portion of the molding die 16 and the steam ejected through the steam supply pipe 16b heats the molding die 16. At this time, by heating the forming mold 16 through the steam, the forming mold 16 is not heated excessively, and a curing temperature suitable for the pretreated toe can be provided.

In detail, the tow injected into the forming mold 16 is expanded in a compressed state by a restoring force and is closely attached to the uneven groove portion 16a. Since the forming mold 16 is heated to a curing temperature suitable for the tow The tow can be brought into close contact with the uneven groove portion 16a and can be hardened.

Accordingly, the tow forming the vent portion 130 of the outer circumference of the filter 100 is expanded by the restoring force in the compressed state, is fitted into the recessed groove portion 16a, So that the ventilation flow passage 120 can be accurately formed so as to conform to the initial design.

That is, since the vent portion 130 is not directly exposed to the steam line, the vent portion 130 can be precisely cured in a shape that is not hardened during the expansion and is formed with the recessed groove portion 16a.

The tow contacted with the forming die 16 is flowed to the merging portion 16c in a state where the toe 130 is formed and is hardened to form a first outlet extending along the center of the forming die 16, The tow that flows along the air passage 15e is discharged to the center of the confluent view 16c in a plasticized state and injected into the vent portion 130 to form the core portion 140. [

That is, the vent portion 130 is formed in a toroidal shape in which the ventilation channel 120 is formed along the outer periphery, and is discharged to the confluent portion 16c and is discharged to the confluent portion 16c along the first discharge port 15e And the core 140 may be formed in the vent 130.

At this time, the tow forming the core portion 140 is discharged to the center of the vent portion 130 in a plasticized state, and can be hardened by residual heat after the vent portion 130 is cured.

That is, the tow flowing to the first outlet 15e is discharged to the confluent portion 16c while being pressed by the first narrowing portion 15c, and is expanded by the elastic restoring force in the plasticized state, The vent portion 130 is hardened by the residual heat after the vent portion 130 is cured, and the vent portion 130 and the core portion 140 are integrated.

Since the core portion 140 is injected into the formed vent portion 130 in a plasticized state and hardened and integrated with the vent portion 130, a separate bonding process is not required, Can be improved.

In addition, the core 140 can be firmly attached to the inner circumferential side of the vent 130 by the elastic restoring force of the material, and can be firmly coupled in a uniform state, so that the quality of the bonding can be remarkably improved.

The core portion 140 is formed such that the vent portion 130 disposed on the outer circumferential side is cured in correspondence with the shape of the inner diameter or the recessed groove portion 16a of the molding die 16, It is possible to have a correct venting rate without changing the density due to the restoring expansion of the material itself.

Accordingly, it is possible to prevent deterioration of the filtering performance due to the density change of the core portion 140, and to accurately measure the filter 100 and the filter inner core portion 130 with a standard corresponding to the diameter of the cigarette tobacco And the quality of the product can be improved.

On the other hand, the filter 100 manufactured in the mold 16 may be cooled with compressed air, cut to a predetermined length after cooling, and flow into the packing machine 19. The manufactured filter 100 is heated and cured inside the mold 16 and then transferred to the rear of the mold 16.

At this time, a cooler 17 may be provided on the rear side of the mold frame 16, and the cooler 17 may be provided with a spray nozzle for spraying compressed air. In detail, some of the short fibers constituting the tow may be cured in a broken state or finely broken during curing.

The short fibers cut into small pieces form fine dust on the outside of the filter 100 or inside the forming die 16. At this time, by applying compressed air to the filter 100 discharged from the mold 16, fine dust adhering to the outside of the filter can be removed along with the cooling of the cured filter.

As a result, it is possible to prevent the adhesion of the filter paper wrapper 110 due to the fine dust, and to prevent fine dust from remaining in the air flow path after the filter paper wrapper 110 is bonded, have.

The filter cooled through the compressed air is transferred to the cutter 18, moved to the packing machine 19 in a cut state in accordance with the size of the cigarette, and transferred to the subsequent cigarette manufacturing process with the filter wrapper 110 attached thereto .

The core portion 140 and the vent portion 130 are compressed to differentiate at appropriate densities through the respective injection portions 15a and 15b and the narrowed portions 15c and 15d provided in the respective injection portions, The ventilation flow path 120 is formed in the molding die 16 and the core part 140 integrated in the ventilation part 130 is formed in the confluence part 16c so that a filter having a multi structure along one processing line It can be manufactured accurately and easily, and productivity and quality of the product can be improved.

2 through 6, the step (s60) of attaching the filter wrapper 110 in the circumferential direction along the outer periphery of the manufactured filter 100 may be performed by attaching the manufactured filter 100 to the fabricated function And combining the signal with the filter (200).

Herein, the functional filter 200 is a general functional filter which can be manufactured in advance through another process line from the air permeable filter 100, and a perfume capsule is inserted into the functional filter 200 or carbon particles are inserted into the functional filter 200 desirable.

In this case, the functional filter 200 may have a diameter that is continuous with the outermost portion of the vent 130, and the functional filter 200 and the breathable filter 100 may be arranged to be continuous, The two filters 200 may be combined by attaching the functional filter 200 and the filter wrapper 110 surrounding the outer periphery of the breathable filter 100.

Of course, it is also possible to apply a separate adhesive between the functional filter 200 and the air-permeable filter 100, and then connect the two filters. The functional filter 200 may be disposed between the air- As shown in FIG.

The core 140 is connected to the central portion of the functional filter 200 and is connected to the outer portion of the functional filter 200 through the ventilation portion 130, So that the smokers can provide the outside air that flows through the filter wrapper 110 and a part of the smoke filtered by the functional filter 200.

5, the breathable filter 100 includes a core portion 140, a vent portion 130, and a filter wrapper 110. As shown in FIG.

Here, the core portion 140 is disposed at a central portion of the filter 100, and the filter tow is aggregated at a low compression ratio and formed at a low density.

In detail, the core portion 140 has a circular cross section, and a small amount of filter tow is injected into the first injection port 15a having a narrow cross-sectional area and is injected along the narrowed portion 15c of the first injection port 15a And may be injected to the center of the confluent portion 16c and disposed at the center portion of the filter 100. [

The ventilation part 130 is formed so that the filter tow coalesces at a high compression ratio and is formed at a high density. The ventilation part 130 is arranged to surround the outer surface of the core part 140, In a plurality of stages.

In detail, the ventilation part 130 is partitioned outside the first injection port 15a, and a large amount of filter tow is injected into the second injection port 15b having a wide cross-sectional area, so that the second injection port 15b And can be agglomerated at a high compression ratio as they are injected along the narrowed portion 15d.

The ventilation part 130 is injected to surround the outside of the core part 140 through the merging part 16c where the molding die 16 and the first outlet 15e are joined, As shown in Fig.

In addition, the vent portion 130 may be cured by the recessed groove portion 16a formed along the inner periphery of the steam-heated forming die 16, and the ventilation passage 120 may be provided on the outer periphery.

The filter wrapper 110 may be packed so as to surround the outside of the vent 130 formed with the ventilation flow path 120.

Accordingly, the vent 130 and the core 140 may be manufactured through a single process line based on the same material, but may also include a core 140 for removing harmful components generated from tobacco, And the ventilation part 130 for improving the flavor of the cigarette by mixing the filtered smoke with the outside air introduced into the ventilation flow path 120 can be provided.

As such, the breathable filter 100 can be manufactured to have a multi-structure through one process line and have high productivity. In addition, the ventilation part 130 and the core part 140 of the breathable filter 100 are accurately manufactured with different shapes and densities, and the suction resistance of the core part 140, the external air ratio through the vent 130, Can be stably maintained in accordance with the initial design, and thus can have high quality.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

100: breathable cigarette filter 110: filter wrapper
120: ventilation flow passage 130:
140: core part 10: supply part
11: stretching machine 12: band machine
13: plasticizer 14: guide roller
15: Injector 16: Molding frame
17: cooler 18: cutter
19: packing machine t, t1, t2: tow

Claims (5)

Preparing a tow for a filter and stretching the tow;
A second step of subjecting the drawn tow to a plasticizing treatment;
A third step of dispersing and injecting the plasticized tow in each of a first injection port having a circular cross section to form a core part and a second injection port partitioned outside the first injection port;
Each of the dispersed injected tows is pressurized by a first squeezing part connected to the first injection port and a second squeezing part connected to the second squeeze port and connected to the first squeezing part and the first squeezing part connected to the second squeezing part A fourth step of dividing into a second outlet and injecting;
Wherein the air outlet is formed in the outer periphery of the air outlet, and the air outlet is formed along the outer periphery of the air outlet. The joining portion joining the forming die and the first outlet, And a fifth step of fabricating a filter by superimposing the vent portion; And
And a sixth step of attaching the filter wrapper in the circumferential direction along the outer periphery of the manufactured filter. The method according to claim 1,
Wherein the second injection port has a larger cross-sectional area than the first injection port so that the tow introduced into the second injection port has a higher compression ratio in the third step,
Wherein the second squeezing portion has a lower internal consumption than the first squeezing portion in the fourth step. The method according to claim 1,
Wherein the fifth step includes a step of steam-heating the forming mold so that the tow contacted with the recessed groove portion has a higher hardening rate than the tow flowing to the first outlet. The method according to claim 1,
The fifth step includes cooling the produced filter with compressed air, and cutting the cooled filter to a predetermined length,
And the sixth step includes coupling the manufactured filter with the prefabricated functional filter. delete

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