CN109123772B - Cigarette filter rod with aromatizing function, preparation method and application thereof - Google Patents

Abstract

The invention discloses a preparation method of cigarette filter sticks with flavoring function and application thereof, which is characterized in that edible essence materials are loaded on natural plant particles, then an adhesive is applied on the particles, and the particles are molded into loose and breathable round sticks with proper size by a mold, the round sticks can be compounded with conventional cigarette sticks and then used for cigarettes, and can also be directly used for cigarettes.

Description

Cigarette filter rod with aromatizing function, preparation method and application thereof

technical field

The invention relates to a preparation method and application of a cigarette filter rod with aromatizing function, and belongs to the technical field of cigarette production.

Background technique

As a filter system for cigarette smoke, cigarette filter rods play an important role in improving the quality and safety of cigarette smoking. However, the current cigarette filter rods have a single form and simple functions, and the trend of cigarette homogenization is becoming more and more serious. Therefore, the new cigarette filter Great research and development has reached an unprecedented height in the industry.

At present, most of the ordinary acetate fiber filter rods used in the tobacco industry are very simple in form and function. The new filter rods developed by many enterprises, such as particle composite rods, paper composite rods, hollow composite rods, etc., are cost-effective, safe and environmentally friendly. It is difficult to be popularized and applied due to the existence of many aspects of , efficacy, odor absorption and process. Due to the amount of particles applied, the particle flavoring filter rods that have been studied more in the tobacco industry recently have insignificant flavoring effects, and it is difficult to achieve the expected effect.

SUMMARY OF THE INVENTION

Aiming at the defects of common acetate fiber filter rods in the prior art, the purpose of the present invention is to provide a flavored cigarette filter rod with low cost, low harm, certain adsorption and retention function, flavoring performance and unique appearance.

Another object of the present invention is to provide a method for preparing the flavored cigarette filter rod with low equipment requirements, simple operation and low cost.

The third object of the present invention is to provide an application of the flavored cigarette filter rod in cigarettes, which can be used as a single rod for cigarette production, or can be combined with a conventional cigarette filter rod for cigarette production.

The existing flavored filter rods, including bead filter rods, flavored particle rods, flavored threads, etc., have limited flavoring capabilities, and are not separated from the main body of the acetate fiber filter rod. The molding equipment, raw materials and processing costs are high, and the acetate fiber Difficult to degrade and cause serious environmental pollution.

In order to overcome the problems of the existing cigarette filter rods, the present invention provides a method for preparing a cigarette filter rod with an aromatizing function. After the plant particles are applied with a binder, the round rods of plant particles are prepared by a tobacco particle round rod forming device;

The tobacco particle round rod forming device includes a single-screw extrusion system and a cooling and shaping system;

The single-screw extrusion system includes a feeder and an extruder; the feeder is arranged on the extruder; the extruder includes a barrel, a heater is provided outside the barrel, and a screw is provided inside, One end of the barrel is provided with a die;

The cooling and shaping system includes a circular tube and a cooler; the cooler is arranged outside the circular tube; one end of the circular tube is butted with the die of the extruder; Axial-parallel grooves;

The mixed material is continuously fed into the barrel of the extruder through the feeder, extruded from the die into the circular tube of the cooling and shaping system under the action of screw extrusion, and then extruded after cooling and shaping to obtain plant particles. Round rod (the present invention is also referred to as tobacco particle round rod, fragrant natural plant particle round rod, also referred to as round rod);

The cigarette filter rod can be obtained by directly cutting and forming the plant particle round rod, or wrapping it with a forming paper and then cutting and forming.

The technical solution of the present invention is to design a special cigarette filter rod forming device, which can realize the preparation of the cigarette filter rod with the aroma supplement function by one-step molding of natural tobacco particles, and can realize continuous production, which greatly simplifies the existing The preparation process of the cigarette filter rod has the advantages of simple equipment and low cost, which is favorable for realizing industrialized production.

According to the technical scheme of the present invention, the filter rod is formed by one-step bonding and molding of scented natural plant materials through the special molding device, and the used filter rod raw materials are derived from edible flavors and natural plant materials, and the safety is more guaranteed; The material not only has good degradation performance, but the filter rod will be decomposed into organic fertilizer to feed back to nature after being discarded, so it has better environmental protection performance; the filter rod is fundamentally different from the existing cigarette filter rod in terms of structure and appearance, and its aromatizing ability Outstanding as a perfect replacement for existing cigarette filters.

Preferably, the screw comprises equidistant threads, and the threads are rectangular, trapezoidal or toothed threads with a height of 3-5 mm.

The distance of the threads is 10-30mm.

The helical protrusions provided on the surface of the screw are the threads. The cross section of the thread along the axial direction of the screw is preferably rectangular, trapezoidal or toothed.

Preferably, the depth of the groove on the thread of the head of the screw is consistent with the height of the thread, and the width is 2-4 mm.

A plurality of groups of grooves are formed on the head thread of the screw rod; the connecting lines of each group of grooves are parallel to the axial direction of the screw rod.

Preferably, there are 3-5 groups of grooves parallel to the axis of the screw on the head thread of the screw.

The grooves of each group are evenly distributed on the outer circumference of the screw.

In the present invention, the circular tube is butted with the die. Warmer tobacco round rods used to receive the output of the die.

Preferably, the inner diameter of the circular tube is 0.3-1.0 mm larger than the inner diameter of the die. After being extruded by the die, the material has a certain expansion and deformation, and it is sent into a glass tube with a slightly larger inner diameter.

That is, the inner diameter of the circular tube is 0.3-1.0 mm larger than the inner diameter of the output end of the die.

The circular tube is tightly connected with the die.

Preferably, the cooler is a water-cooled cooler or an air-cooled cooler, and conventional coolers in the prior art that are cooled in an air-cooled or water-cooled manner can be selected.

Preferably, the screw is a 20 equidistant screw.

Preferably, the round tube is a glass round tube.

In a preferred solution, the natural plant material is selected from at least one of the shells of commercial crops, the slag of commercial crops, the cores of commercial crops, the peel of melons, and wood.

For example, the natural plant material is selected from or can be in contact with a food material.

Further preferably, the natural plant material is selected from at least one of rice husk, bagasse, corncob, walnut husk, coffee husk, peanut husk, cork, coconut husk, orange peel, and grapefruit peel.

In a preferred solution, the plant material is pulverized into particles with a particle size of 10-100 meshes, preferably 20-80 meshes. Appropriate particle size can ensure that the prepared filter rod maintains a suitable suction resistance.

In the present invention, the different types of natural plant materials can be separately crushed to the stated particle size and then mixed; or the different types of raw materials can be mixed and then crushed together to the stated particle size.

In a preferred solution, the edible flavors are citrus flavors, fruit flavors, mint flavors, bean flavors, spicy flavors, milk flavors, meat flavors, and nut flavors. At least one of flavors, wine-type flavors, and vegetable-type flavors. Different flavoring types can be selected according to different consumer needs.

For example, the edible flavors are edible flavors such as bean flavor, peppermint essential oil, strawberry flavor, milk flavor and the like.

In a preferred solution, the fragrance-enhancing plant granules are formed by spraying the edible flavor solution on the granules of natural plant materials and then drying them in a vacuum microwave oven.

In a preferred solution, in the fragrance plant particles, the edible flavor material is 0.01wt% to 5wt% of the weight of the natural plant material.

Further preferably, in the fragrance plant particles, the edible flavor material is 0.1wt% to 3wt% of the weight of the natural plant material. That is, the loading amount of the flavoring material on the particles of the natural plant material is 0.1 wt % to 3 wt % (based on the weight of the natural plant material). Appropriate amount of flavorings can ensure the effectiveness of flavoring, and at the same time will not mask the original flavor of tobacco.

Preferably, the moisture content of the fragrance plant particles is 5-12%.

After the edible flavor solution is sprayed on the particles of the natural plant material, it is dried by vacuum microwave irradiation. Vacuum microwave drying to the stated moisture content helps to maximize aroma retention without loss.

In a preferred solution, the mass of the fragrance plant particles and the binder is 100:(1-30). Appropriate binder ratio is beneficial to improve the performance of the prepared cigarette filter rod.

Further preferably, the mass of the fragrance plant particles and the binder is 100:(5-20).

In a preferred solution, the adhesive is at least one of a water-based adhesive and a hot melt adhesive. Appropriate binders can make the aroma plant granular materials bond and shape while ensuring the cutability of the pellets.

In a preferred solution, the water-based binder refers to at least one of white latex for cigarettes, modified starch, gum arabic, polyvinyl alcohol, and sodium hydroxypropyl cellulose. Appropriate water-based binders can quickly bond and form the fragrance plant particulate materials.

In a preferred solution, the hot melt adhesive refers to one of polyethylene, microcrystalline wax, vinyl acetate, polyolefin, polyisobutylene, ethylene-vinyl acetate copolymer, and polymerized rosin. Using the characteristics of hot melt adhesive melting at higher temperature and curing at lower temperature, it can be used for bonding and molding of natural plant particles for fragrance, and the particle round rods will be more flexible.

In a preferred solution, the water-based adhesive is directly sprayed on the surface of the fragrance plant particles. For example, the aqueous binder and/or its solution can be sprayed directly onto the aroma-scenting plant particles.

After the hot melt adhesive is melted, it is sprayed on the surface of the fragrance plant particles.

After spraying the adhesive on the surface of the fragrance plant particles, the existing conventional methods can be used to stir and mix evenly.

In the present invention, the moisture content of the plant particle round rod is 8-12wt%. Appropriate moisture ensures that the fragrant plant granular material does not become moldy and does not feel dry when sucked.

In a preferred solution, the density of the plant particle round rod is 0.3-5 g/mL, preferably 0.5-3 g/mL. Appropriate round rod density can ensure that the suction resistance of the filter rod is maintained within the allowable range.

The present invention also provides a cigarette filter rod with aromatizing function, which is prepared by the preparation method.

Preferably, in the cigarette filter rod with flavoring function, the moisture content of the cigarette filter rod is 8-12wt%.

Preferably, in the cigarette filter rod with flavoring function, the density of the cigarette filter rod is 0.3-5 g/mL; more preferably, it is 0.5-3 g/mL.

In addition, the present invention also provides an application of the cigarette filter rod, and the cigarette filter rod is used for cigarette preparation directly or after being compounded with other cigarette filter material rods.

Preferably, other cigarette filter material rods can be existing common filter rods, such as at least one of acetate fiber filter rods, propionate fiber filter rods, and paper filter rods.

The cigarette filter rod is obtained by cutting and shaping the plant particle round rod; or, wrapping with a shaping paper and then cutting and shaping the cigarette filter rod.

In the present invention, a kind of preferred preparation method comprises the following steps:

1) after the natural plant material is removed impurities, dried, sterilized, pulverized and screened to obtain particle diameter of 20-80 purpose particles; Described natural plant material is selected from rice husk, bagasse, corncob, walnut shell, coffee husk, peanut At least one of shell, cork, coconut shell, orange peel, grapefruit peel;

2) spraying the edible essence solution on the granules of the above-mentioned natural plant material, stirring evenly, the aroma-smelling plant granules of vacuum microwave drying; wherein, the moisture content of the aroma-bearing plant granules is 5-12%;

The edible flavors are citrus flavors, fruit flavors, mint flavors, bean flavors, spicy flavors, milk flavors, meat flavors, and nut flavors. At least one of seasonings, wine-type flavors, and vegetable-type flavors;

3) Mix the fragrance plant particles and the binder evenly in a ratio of 100:(5-20) by mass;

4) the material after the sizing in the step (3) adopts the tobacco particle round rod forming device to prepare the aroma plant particle round rod;

5) The round bar of the scented natural plant particles is directly cut into shape, or is wrapped with molding paper and then cut into shape to obtain the final product.

The present invention also includes a cigarette filter rod prepared by the preparation method, wherein the moisture content of the cigarette filter rod is 8-12 wt %, and the density is 0.3-5 g/mL.

Preferably, the moisture content of the cigarette filter rod is 9-10wt%; the density is 1.0-2.5g/mL.

The present invention also provides the application of the cigarette filter rod prepared by the preparation method, and the cigarette filter rod is used for cigarette preparation directly or after being compounded with other cigarette filter material rods.

In the present invention, the prepared cigarette filter rod can be directly used as a filter rod and a cut tobacco rod to be compounded to make a cigarette; it can also be compounded with other cigarette filter material rods and then compounded with a cut tobacco stick to make a cigarette.

The single-screw extruder in the prior art is mainly used for plastic extrusion molding, and its screw is divided into three sections in effective length. ) and metering section (L3); the solid material in the L1 section gradually becomes dense from the feed port to the head direction, the solid material in the L2 section gradually melts as the temperature gradually increases, and the L3 section material is in a molten high temperature state. After the die, it is cooled and formed in different ways. In order to ensure the smooth melt extrusion of the material, in general, the L1 and L2 sections are heating sections, and the L3 section is heated or cooled depending on the specific situation. The screw with this setting cannot be directly used for the non-melting tobacco powder bonding molding of the present invention. The main reason is that the material from the L1 section to the L3 section is a process of rapid pressurization and heating. Due to high temperature and high pressure, it becomes very dense and gelatinized, which cannot meet the preparation of hollow rods. On the one hand, the technical solution of the present invention is provided with a longitudinal groove on the head of the screw (as shown in Figure 1), and the groove can ensure that a certain degree of looseness is maintained when the pellets are extruded, so that the flow can be divided into the die; on the other hand There is a cooling device at the die of the screw extruder to rapidly cool and solidify the material extruded from the screw; the pellets are initially formed after being extruded through the die, and will have a certain expansion and deformation, and they will be fed into a slightly larger inner diameter. After rapid cooling and shaping, it is output from the other end of the round tube to obtain a loose and air-permeable particle filter rod.

Compared with the prior art, the technical effect brought by the technical solution of the present invention:

1) The raw material of the filter rod of the present invention is derived from or can be in contact with the food material, which is widely sourced, safe and cheap; the existing raw material of the filter rod is acetate fiber, which is a chemical fiber material, which is expensive and has controversial safety.

2) After the filter rod material of the present invention is discarded, it can be degraded and decomposed into organic fertilizer to feed back to nature, which is friendly to the environment; the existing filter rod acetate fiber material is extremely difficult to degrade, and will cause serious pollution and damage the environment after discarding.

3) The filter rod of the present invention is more round and plump, has high hardness, and maintains the same shape before and after smoking; the existing cigarette filter rod has low hardness, and thermal collapse cannot be avoided during smoking, and the filter tip is seriously deformed after smoking, which affects the appearance.

4) The filter rod of the present invention is formed by bonding and molding of plant particles, the color is natural color, and the appearance is very distinctive; the existing acetate fiber filter rod is a wire mesh structure, and the color is almost all white with inorganic fillers, and the appearance is uniform. feature.

5) The filter rod production equipment of the present invention is simple, and the preparation method is simple, and the use of raw materials can be regarded as waste recycling; the existing acetate fiber filter rod production equipment is complicated, and the price is extremely expensive, and the preparation of raw material acetate fiber and its tedious and complicated. Huge consumption.

6) The filter rod of the present invention can be composed entirely of fragrance plant particles, which can ensure sufficient fragrance imparting amount under the condition of low load, and the fragrance effect is more prominent.

Description of drawings

[Fig. 1] is a schematic diagram of the tobacco particle round rod forming device according to the present invention;

[Fig. 2] is a photo of the head of the screw of the tobacco particle round rod forming device according to the present invention;

Among them, 1 is the feeder, 2 is the extruder, 3 is the heater, 4 is the screw, 4-1 is the thread on the screw surface; 4-2 is the groove of the screw head; 5 is the die, and 6 is the cooling device, 7 is a glass round tube.

Detailed ways

The following examples are intended to illustrate the content of the present invention, rather than to further limit the protection scope of the present invention.

As shown in Figures 1 and 2, the tobacco particle round rod forming device used in the following examples includes a single-screw extrusion system and a cooling and sizing system;

The single screw extrusion system includes a feeder 1 and an extruder 2; the feeder 1 is arranged on the extruder 2; the extruder 1 includes a barrel, a heater 3 is provided outside the barrel, and a heater 3 is provided inside the barrel. A screw 4 is provided, and a die 5 is provided at one end of the barrel;

The cooling and shaping system includes a round pipe 7 and a cooler 6; the cooler 6 is arranged outside the round pipe 7; one end of the round pipe 6 is butted with the die 5 of the extruder 2; There are multiple groups of grooves 4-2 parallel to the axis of the screw 4 on the thread 4-1;

The mixed material is continuously fed into the barrel of the extruder 2 through the feeder, and extruded from the die 5 into the circular tube 7 of the cooling and shaping system under the extrusion action of the screw 4. After cooling and shaping, the extruded material is extruded. , to obtain round rods of tobacco particles;

The specific preparation method refers to the following specific examples:

Example 1

In this example, an improved single-screw extruder is used for the preparation of cigarette filter rods, and the following improvements are made on the basis of a conventional single-screw extruder (such as Leicester ZSE MAXX): 1) Screw 4 is 20 Equidistant screw, the thread 4-1 is a toothed thread with a height of 4mm; the head of the screw 4 is provided with 4 groups of equidistant grooves 4-2; the grooves 4-2 are evenly arranged along the outer circumference of the screw 4; The depth of the groove 4-2 on the head thread of the screw 4 is consistent with the height of the thread 4-1, and the width is 3mm; 2) the die 5 with an inner diameter of 7.0mm is followed by a glass tube 7 with an inner diameter of 7.5mm, The round pipe 7 surrounds the air-cooled cooler 6 .

1) Sterilize and sterilize the corn cob by high-temperature cooking after removing impurities; 2) Mechanically pulverize and screen out 20-80 purpose corn cob particles, and balance the moisture to 8% for use; 3) The bean essence is mass ratio 1% is sprayed on the above-mentioned corncob particles, stirred evenly, and dried in a vacuum microwave oven to 6% moisture to obtain flavored corncob particles; 4) The white latex for tobacco, which accounts for 10% of the weight of the flavored corncob particles, is sprayed on the flavored corncob. 5) The above-mentioned sizing-flavored corncob granules are extruded using an improved single-screw extruder, and the material preliminarily formed by the die enters the glass tube for further fine cooling and shaping, and then extrudes from the other end. Then, loose and breathable round sticks of fragrant corncob particles were obtained, the density of the round sticks was 1.0 g/mL, and the water content was 11%. 6) The round stick of flavored corncob particles is extruded and cut into a length of 100 mm to obtain the desired flavored corncob particle cigarette filter rod. The filter rod can be directly used for rolling cigarettes.

Example 2

In this example, an improved single-screw extruder is used for the preparation of cigarette filter rods, and the following improvements are made on the basis of a conventional single-screw extruder (such as Leicester ZSE MAXX): 1) Screw 4 is 20 Equidistant screw, the thread 4-1 is a toothed thread 4-1 with a height of 4mm; the head of the screw 4 is provided with 3 groups of equidistant grooves 4-2; the grooves 4-2 are along the outer circumference of the screw 4 Evenly arranged; the depth of the groove 4-2 on the head thread of the screw 4 is consistent with the height of the thread 4-1, and the width is 3mm; 2) the die 5 with an inner diameter of 7.2mm is followed by a glass circle with an inner diameter of 7.5mm The tube 7, the round tube 7 is surrounded by the air-cooled cooler 6.

1) After removing impurities from the walnut shell bar, high-temperature cooking, disinfection, sterilization, and drying; 2) Mechanically pulverized and screened out 20-80 purpose walnut shell particles, and the equilibrium moisture is 8% for use; 3) The peppermint essential oil is mass ratio 0.5 % spray on the above-mentioned walnut shell particles, stir evenly, vacuum microwave drying to 6% moisture to obtain flavored walnut shell particles; 4) spray polyvinyl alcohol accounting for 15% of the weight of the walnut shell particles on the walnut shell particles, and stir evenly 5) The walnut shell granules of above-mentioned sizing are extruded using an improved single-screw extruder, and the material preliminarily formed through the die enters the glass circular tube for further fine cooling and shaping, and extrudes from the other end to obtain loose and breathable walnut shells Particle round bar, the round bar density is 1.5g/mL; the water content is 9%. 6) The round rod of walnut shell particles is extruded and wrapped with forming paper, and cut into a length of 120 mm to obtain the desired degradable walnut shell particle cigarette filter rod. The filter rod and the ordinary acetate fiber rod are compounded in a ratio of 15:10 in length and are used for rolling cigarettes.

Example 3

In this example, an improved single-screw extruder is used for the preparation of cigarette filter rods, and the following improvements are made on the basis of a conventional single-screw extruder (such as Leicester ZSE MAXX): 1) Screw 4 is 20 Equidistant screw, the thread 4-1 is a toothed thread with a height of 4mm; the head of the screw 4 is provided with 5 groups of equidistant grooves 4-2; the grooves 4-2 are evenly arranged along the outer circumference of the screw 4; The depth of the groove 4-2 on the head thread of the screw 4 is consistent with the height of the thread 4-1, and the width is 3mm; 2) the die 5 with an inner diameter of 6.8mm is followed by a glass tube 7 with an inner diameter of 7.5mm, The round pipe 7 surrounds the air-cooled cooler 6 .

1) After removing impurities from the coffee husk and coconut husk, retort, sterilize and dry at high temperature respectively; 2) Mechanically pulverize and screen out 20-80 mesh coffee husk and coconut husk powder, and balance the moisture to 10% for later use; 3) The above-mentioned coffee husk and coconut husk powder are mixed uniformly by mass ratio 2:1 to obtain mixed powder; 4) strawberry essence is sprayed on above-mentioned mixed powder by mass ratio of 0.3%, stirred evenly, and dried in vacuum microwave to moisture 6% to obtain 5) The modified starch and gum arabic mixed glue (mass ratio 3:1) accounting for 18% by weight of the mixed powder are sprayed on the jade mixed powder, and stirred evenly; 6) the above-mentioned sizing The mixed powder is extruded by an improved single-screw extruder, and the material preliminarily formed by the die enters the glass round tube for further fine cooling and shaping, and then extrudes from the other end to obtain a loose and breathable mixed particle round rod, with a round rod density of 2.5g /mL; water content is 10%. 7) The mixed particle round rod is extruded and cut into a length of 100mm to obtain the desired degradable mixed particle cigarette filter rod. The filter rod can be directly used for rolling cigarettes.

Example 4

In this example, an improved single-screw extruder is used for the preparation of cigarette filter rods, and the following improvements are made on the basis of a conventional single-screw extruder (such as Leicester ZSE MAXX): 1) Screw 4 is 20 Equidistant screw, the thread 4-1 is a toothed thread with a height of 4mm; the head of the screw 4 is provided with 4 groups of equidistant grooves 4-2; the grooves 4-2 are evenly arranged along the outer circumference of the screw 4; The depth of the groove 4-2 on the head thread of the screw 4 is consistent with the height of the thread, and the width is 3mm; 2) the die 5 with an inner diameter of 6.5mm is followed by a glass round tube 7 with an inner diameter of 7.5mm, and the round tube 7 The air-cooled cooler 6 is surrounded on all sides.

1) After removing impurities from the cork, high-temperature cooking, disinfection, sterilization and drying; 2) Mechanically pulverizing and screening out 20-80 mesh cork particles, and balancing the moisture to 10% for use; On the above-mentioned cork particles, stir evenly, and vacuum microwave drying to moisture 6% to obtain perfumed cork particles; 4) Weigh 15% polyethylene hot-melt adhesive by weight of cork particles, and evenly spray it on the surface of the above-mentioned cork particles after dissolving, and use the modified cork particles. The material preliminarily formed by the die enters the glass round tube for further fine cooling and shaping, and then extrudes from the other end to obtain a cork particle round rod with a density of 0.5g/ml and a moisture content of 9%; 5) The cork particle round rod is extruded and wrapped with molding paper, and then cut into a length of 100 mm to obtain the desired degradable cork particle cigarette filter rod. The filter rod can be directly used for rolling cigarettes.

Sample smoke assessment:

The cigarette filter rods made in Examples 1-4 were respectively rolled with cigarettes of the same brand and compared with conventional cigarettes. The results are shown in Table 1.

Table 1

It can be seen from the above evaluation results that the filter rod prepared by the present invention has obvious aromatizing effect, and the smoke interception effect is comparable to that of acetate fiber. The filter rod of the invention has controllable suction resistance, greatly improved hardness and distinctive appearance.

Claims (23)

1. The preparation method of the cigarette filter stick with the flavoring function is characterized in that edible essence and particles of natural plant materials are mixed to obtain flavoring plant particles, the flavoring plant particles are added with an adhesive and then are uniformly stirred and mixed to obtain a mixed material, and then the plant particle round stick is prepared by a tobacco particle round stick forming device;

   the tobacco particle round bar forming device comprises a single-screw extrusion system and a cooling and shaping system;

   the single-screw extrusion system comprises a feeder and an extruder, wherein the feeder is arranged on the extruder, the extruder comprises a machine barrel, a heater is arranged outside the machine barrel, a screw is arranged inside the machine barrel, and a mouth die is arranged at the end of the machine barrel;

   the cooling and shaping system comprises a circular tube and a cooler, wherein the cooler is arranged outside the circular tube, the end of the circular tube is in butt joint with a die of an extruder, and a plurality of groups of grooves parallel to the axis of the screw are formed in the head thread of the screw;

   continuously feeding the mixed material into a machine barrel of an extruder through a feeder, extruding the mixed material into a circular tube of a cooling and shaping system from a neck mold under the extrusion action of a screw, cooling and shaping the mixed material, and extruding the mixed material to obtain a plant particle circular rod;

   and directly cutting and molding the plant particle round bar, or cutting and molding after wrapping by using molding paper to obtain the cigarette filter stick.
2. 2. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, characterized in that: the connecting line of each group of grooves is parallel to the axial direction of the screw; and all the groups of grooves are evenly distributed on the periphery of the screw.
3. 3. The method for preparing a cigarette filter stick with a flavoring function according to claim 2, characterized in that: and 3-5 groups of grooves parallel to the axis of the screw are formed in the head thread of the screw.
4. 4. The preparation method of the cigarette filter stick with the flavoring function according to claim 3, wherein the depth of the groove on the head thread of the screw is equal to the height of the thread, and the width is 2-4 mm.
5. 5. The method for preparing a cigarette filter stick with a flavoring function according to claim 4, characterized in that: the screw rod contains the equidistance screw thread, the screw thread is the rectangle, trapezoidal or profile of tooth screw thread that highly is 3~5 mm.
6. 6. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, characterized in that: the inner diameter of the circular tube is 0.3-1.0 mm larger than that of the neck ring mold.
7. 7. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, characterized in that: the cooler is a water cooling cooler or an air cooling cooler.
8. 8. The method for preparing a cigarette filter stick with a flavoring function according to any one of claims 1 to 7 to , wherein the natural plant material is at least selected from the group consisting of a shell of a cash crop, a residue of a cash crop, a core of a cash crop, a peel of a melon and a fruit, and wood.
9. 9. The method for preparing a cigarette filter stick with a flavoring function according to claim 8, wherein the natural plant material is at least selected from rice hull, bagasse, corn cob, walnut shell, coffee shell, peanut shell, cork, coconut shell, orange peel and shaddock peel.
10. 10. The method for preparing a cigarette filter stick with a flavoring function according to claim 8, wherein the particle size of the natural plant material is 10-100 meshes.
11. 11. The method for preparing a cigarette filter stick with a flavoring function according to any one of , 9 or 10 of claims 1 to 7, wherein the edible essence is at least selected from citrus type essence, fruit type essence, mint type essence, bean type essence, spice type essence, milk type essence, meat type essence, nut type essence, wine type essence and vegetable type essence.
12. 12. The method for preparing a cigarette filter stick with a flavoring function according to claim 11, wherein the edible essence is 0.01-5 wt% of the natural plant material in the flavoring plant particles.
13. 13. The method for preparing a cigarette filter stick with a flavoring function according to claim 11, wherein the edible essence is 0.1-3 wt% of the natural plant material in the flavoring plant particles.
14. 14. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, wherein the flavoring plant particles are prepared by spraying edible essence material solution on particles of natural plant materials and then performing vacuum microwave drying, and the moisture content of the flavoring plant particles is 5-12%.
15. 15. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, wherein the adhesive is at least of water-based adhesive and hot melt adhesive.
16. 16. The method for preparing a cigarette filter stick with a flavoring function according to claim 15, wherein the water-based binder is at least kinds of white latex, modified starch, acacia, polyvinyl alcohol and hydroxypropyl cellulose sodium for cigarettes.
17. 17. The method for preparing a cigarette filter stick with a flavoring function according to claim 15, wherein the hot melt adhesive is at least selected from polyethylene, microcrystalline wax, vinyl acetate, polyolefin, polyisobutylene, ethylene-vinyl acetate copolymer and polymerized rosin.
18. 18. The method for preparing a cigarette filter stick with a flavoring function according to any one of claims 15 to 17 to , wherein the aqueous adhesive is directly sprayed on the surfaces of the flavoring plant particles, and the hot melt adhesive is sprayed on the surfaces of the flavoring plant particles after being melted.
19. 19. The method for preparing a cigarette filter stick with a flavoring function according to claim 18, wherein the mass ratio of the flavoring plant particles to the adhesive is 100: (1-30).
20. 20. The method for preparing a cigarette filter stick with a flavoring function according to claim 1, wherein the moisture content of the plant particle round stick is 8-12 wt%.
21. 21. The preparation method of the cigarette filter stick with the flavoring function according to claim 1, wherein the density of the plant particle round stick is 0.3-5 g/mL.
22. 22, cigarette filter stick with perfuming function, characterized in that, it is made by the preparation method of any of claims 1-21.
23. 23, use of the cigarette filter stick with perfuming function of claim 22, wherein the cigarette filter stick is used for cigarette preparation directly or after being compounded with other cigarette filter sticks.

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