WO2022121480A1

WO2022121480A1 - Fully degradable cooling assembly, preparation method therefor and use thereof

Info

Publication number: WO2022121480A1
Application number: PCT/CN2021/122583
Authority: WO
Inventors: 杨俊鹏; 杨光远; 彭三文; 邓少鹏; 李世建; 王昊
Original assignee: 湖北中烟工业有限责任公司
Priority date: 2020-12-11
Filing date: 2021-10-08
Publication date: 2022-06-16
Also published as: CN113773623A

Abstract

Disclosed are a fully degradable cooling assembly, a preparation method therefor and use thereof. The fully degradable cooling assembly comprises a fully degradable cooling master batch for reducing smoke temperature. The cooling master batch is made of a plurality of fully degradable materials and a solubilizer. The preparation method for the fully degradable cooling assembly comprises the following steps: obtaining the plurality of fully degradable materials and mixing same, and adding the solubilizer during the mixing to obtain a raw material for granulation; and extruding and granulating the raw material by using an extrusion and granulation process, so as to obtain the fully degradable cooling master batch. Use of the degradable cooling assembly in a cooling filter bar for heat-not-burn cigarettes. The use comprises the use of the cooling master batch in the cooling filter bar; and/or the use of cooling pipes in the cooling filter bar. The present invention can effectively reduce the temperature of the smoke at the inlet end of cigarettes, and does not affect the suction resistance and the filtering efficiency of the cooling filter bar.

Description

Fully degradable cooling firmware and preparation method and use thereof

technical field

The invention belongs to the technical field of tobacco, and in particular relates to a fully degradable cooling firmware and a preparation method and application thereof.

Background technique

When smoking an HNB (heat not burn) product, the smoke in the filter rod is in an aerosol state (aerosol particles in the state of tiny droplets). Since the size and composition of aerosol particles are directly affected by the temperature of the smoke, the harmful components of the smoke and the sensory quality of the HNB cigarettes will also be affected by the temperature of the smoke. After the tobacco components in the heat-not-burn cigarette are heated by a heating device at about 250-350°C (degrees Celsius), nicotine and some aromatic substances will be fully released.

technical problem

However, due to the short cigarette length and poor heat exchange efficiency of heat-not-burn cigarettes, the temperature of the smoke at the entrance is usually relatively high, and the strong burning sensation and irritation will bring consumers a poor smoking experience. In order to reduce the temperature of the flue gas at the inlet end, the method of increasing the suction resistance and improving the filtration efficiency is generally adopted to realize the cooling of the flue gas. However, according to the product characteristics of heat-not-burn cigarettes, when the suction resistance is increased and the filtration efficiency is improved, the smoke components will be too much adsorbed by the filter rod, and the amount of smoke will be reduced, making the consumer experience better and better. Satisfaction deteriorates. Therefore, it is necessary to realize the cooling of the flue gas at the inlet end without affecting the suction resistance and filtration efficiency of the filter rod.

technical solutions

The purpose of the present invention is to aim at the deficiencies of the prior art, to provide a fully degradable cooling firmware and a preparation method and application thereof, which can reduce the temperature of the smoke at the inlet end of the heat-not-burn cigarette without affecting the suction resistance of the cooling filter rod. and filtration efficiency.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a fully degradable cooling firmware, including a fully degradable cooling master batch for reducing the temperature of flue gas; the cooling master batch is made of a variety of fully degradable materials and solubilizers. .

In a specific embodiment, the plurality of fully degradable materials include polylactic acid, polycaprolactone, thermoplastic polyester elastomer, copolymers of butylene adipate and butylene terephthalate, poly Various substances in butylene succinate, polypropylene, and polyethylene.

In a specific embodiment, the components of the multiple fully degradable materials and the ratio of each component are the polylactic acid: the polycaprolactone: the butylene adipate and terephthalate Copolymer of butylene formate=1:2:7, the copolymer of butylene adipate and butylene terephthalate: the thermoplastic polyester elastomer=2:8 or all The polypropylene: the polybutylene succinate: the polycaprolactone=3:3:6.

In a specific embodiment, the solubilizer includes one or more of PR023-7, ADR, 115C, isopropanol, maleic anhydride, epoxy compatibilizer, polyethylene glycol and polycaprolactone .

In a specific embodiment, the mass fraction of the solubilizer in the cooling master batch is 0.3-1.5%.

In a specific embodiment, the fully degradable cooling firmware includes a fully degradable cooling pipe for reducing flue gas; the interior of the cooling pipe is provided with an air flow that passes through both ends of the axial direction and is used for the flue gas to pass through. channel; the cooling pipe is made of the cooling master batch.

In a specific embodiment, the airflow channel includes a full-through hollow cavity, a spoked hollow cavity or a non-through hollow cavity.

The preparation method of fully degradable cooling firmware includes the following steps: obtaining the multiple fully degradable materials and mixing, and adding the solubilizer during the mixing process to obtain raw materials for granulation; extruding and granulating In the process, the raw materials are extruded and pelletized to obtain the fully degradable cooling masterbatch.

In a specific embodiment, the multiple fully degradable materials are dried; the drying temperature is 60-80 degrees Celsius; and the drying time is 2-4 hours.

In a specific embodiment, the raw material is extruded and pelletized by an extrusion and pelletizing process, and the process of obtaining the cooling masterbatch includes: determining an extruder, a first shaping device, a first cooling/ an air-drying device and a first shearing device; placing the raw material in the extruder, so that the raw material is melted, plasticized and extruded to form the cooling master batch parison; The blank is placed in the first setting device for structure, shape and size setting; the first cooling/air-drying device is used to cool and/or air-dry and solidify the shaped cooling masterbatch parison; The first shearing device cuts the solidified cooling master batch parison to obtain the cooling master batch.

In a specific embodiment, the first setting device includes a first vacuum cooling setting sleeve for setting the structure, shape and size of the cooling masterbatch parison; the first cooling/air-drying device includes a an air-cooled conveyor belt for transferring the cooling masterbatch parison and cooling and solidifying it; the first shearing device includes a pelletizer for dicing the cooling masterbatch parison.

In a specific embodiment, a first pressure sensor is provided on the screw of the extruder and/or the extrusion die, and the first pressure sensor is connected to a first servo motor.

In a specific embodiment, the raw material is extruded and granulated by an extrusion and granulation process, and the process of obtaining the cooling masterbatch further includes: determining a first feeding device for quantitatively feeding the raw material placed in the extruder.

In a specific embodiment, the cooling masterbatch is prepared into the cooling tube by an extrusion process.

In a specific embodiment, the process of using the extrusion molding process to prepare the cooling masterbatch into the cooling pipe includes: determining an extruder, a second shaping device, a second cooling/air-drying device, a dislocation traction device and The second shearing device; placing the cooling masterbatch in the extruder, so that the cooling masterbatch is melted, plasticized and extruded to form the cooling tube parison; the cooling tube parison is Place in the second shaping device for structure, shape and size shaping; use the second cooling/air-drying device to cool and/or air-dry the shaped cooling tube parison; use the dislocation traction The device displaces, twists and pulls the solidified cooling tube parison to form a cooling section product; uses the second shearing device to cut the cooling section product to obtain the cooling tube.

In a specific embodiment, the inside of the extruder is provided with a material conveying part, a material melting part, a melt conveying part, a homogenizing conveying part, a heating and heat preservation part and an extrusion die head; It is used to transport the cooling master batch to the inside of the extruder; the material melting part is used to make the cooling master batch reach the melting temperature and gradually melt into a melt; the melt conveying part is used to The melt is stirred and mixed along the screw of the extruder and conveyed to the homogenizing conveying part; the homogenizing conveying part is used to continuously melt and stabilize the melt and convey it to the heating and heat preservation part; The heating and heat preservation part is used to stabilize the temperature of the melt; the extrusion die part is used to extrude the melt and form a tubular strand.

In a specific embodiment, the material conveying part is provided with a first temperature control part for controlling the conveying temperature of the cooling masterbatch; the material melting part is provided with a second temperature control part for controlling the melting temperature of the cooling masterbatch a control part; the melt conveying part is provided with a third temperature control part for controlling the temperature of the melt being stirred, mixed and conveyed along the screw of the extruder; the homogenization conveying part is provided with a third temperature control part for controlling the temperature The melt continues to melt and stabilize and conveys the temperature of the fourth temperature control part; the heating and heat preservation part is provided with a fifth temperature control part for stabilizing the melt temperature; the extrusion die head is provided with a The melt is extruded and forms a sixth temperature control portion of the temperature of the tubular strand.

In a specific embodiment, the first temperature control part is used to keep the conveying temperature of the cooling masterbatch at 110-140 degrees Celsius; the second temperature control part is used to make the cooling masterbatch melt at a temperature of 110-140 degrees Celsius. maintained at 140-180 degrees Celsius; the third temperature control part is used to keep the temperature at which the melt is stirred, mixed and transported along the screw of the extruder at 150-180 degrees Celsius; the fourth temperature control part The fifth temperature control part is used to keep the stable temperature of the melt at 150-180 degrees Celsius; the fifth temperature control part is used to keep the stable temperature of the melt at 140-165 degrees Celsius; the sixth The temperature control part is used to keep the temperature at which the melt is extruded and formed into the tubular strand at 130-150 degrees Celsius.

In a specific embodiment, the second setting device includes a second vacuum cooling setting sleeve for setting the structure, shape and size of the cooling tube parison; the second cooling/air-drying device includes a setting sleeve for holding a cooling tank for cooling the liquid and cooling and solidifying the cooling tube parison; the dislocation traction device includes a dislocation twisting part for dislocation and twisting the solidified cooling tube parison and a dislocation twisting part for dislocation and twisting the The pulling part of the cloth tape reel of the filter rod forming machine for pulling the parison of the cooling tube; the second shearing device includes the flying scissor head for cutting the product in the cooling section.

In a specific embodiment, the cooling/air-drying device further includes a suction tape for further cooling and solidifying the cooling tube parison.

In a specific embodiment, a second pressure sensor is provided on the screw of the extruder and/or the extrusion die head, and the second pressure sensor is connected to a second servo motor.

In a specific embodiment, the process of using the extrusion molding process to prepare the cooling masterbatch into the cooling pipe further includes: determining a second feeding device for quantitatively placing the cooling masterbatch on the cooling pipe. inside the extruder.

Use of fully degradable cooling firmware in cooling filter rods for heat-not-burn cigarettes; the uses include: the use of the cooling masterbatch in the cooling filter rod; and/or the use of a cooling tube in the cooling filter rod use.

In a specific embodiment, the cooling filter rod includes a plurality of first solid filter rods, and particle segments are arranged between adjacent first solid filter rod segments; the particle segments include a hollow tube body and a the cooling masterbatch in the hollow tube body; the first solid filter rod is used to block the cooling masterbatch; the first solid filter rod adopts the first polymer fiber and plasticizer or glue The first polymer fiber comprises polylactic acid tow, polypropylene tow and/or cellulose diacetate tow.

In a specific embodiment, the cooling filter rod comprises a hollow filter rod and/or a second solid filter rod, and is connected to one end and/or both ends of the second solid filter rod and/or the hollow filter rod the cooling tube; the second solid filter rod is made of the second polymer fiber and plasticizer or adhesive; the second polymer fiber includes polylactic acid tow, polypropylene tow and/or Cellulose diacetate tow; the hollow filter rod is made of a third polymer fiber and a plasticizer or adhesive; the third polymer fiber includes polylactic acid tow, polypropylene tow and/or two Cellulose acetate tow; the hollow filter rod is provided with a hollow cavity body, and the hollow cavity body includes an axial through-type hollow cavity or an axial non-through type hollow cavity; The hardness is more than 60% of the hardness of the solid filter rod of the same material and outer diameter.

beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

1. The fully degradable cooling firmware of the present invention can effectively improve the heat absorption efficiency of the flue gas in the cooling section of the cooling filter rod, and the cooling effect is good, and simultaneously does not affect the suction resistance and the filtration efficiency of the cooling filter rod.

2. The fully degradable cooling firmware of the present invention has good thermal stability, good safety and good environmental protection.

3. The fully degradable cooling firmware of the present invention has low material consumption and good economy.

4. The fully degradable cooling firmware of the present invention includes a cooling master batch and/or a cooling tube, and has a simple structure and convenient use.

5. The cooling pipe of the present invention can increase the contact area between the flue gas and the airflow channel, and prolong the circulation and residence time of the flue gas in the airflow channel; thus, the contact collision effect between the flue gas and the material can be improved, and the cooling effect is remarkable.

6. The present invention is provided with a cooling tank and a suction ribbon, which can effectively cool and solidify the cooling tube parison, so that the spokes inside the cooling tube parison have a better cooling and shaping effect; at the same time, the cold air of the suction ribbon can also remove the cooling tube. The moisture on the blank is ready for the cutting of the cooling tube parison.

7. The present invention is provided with a dislocation traction device. The dislocation traction device includes a dislocation twisted part and a filter rod forming machine tape reel traction part. The dislocation twisted part can increase the contact area between the flue gas and the airflow channel, and improve the contact between the flue gas and the raw material. The collision effect can further improve the cooling effect of the flue gas, and the traction part of the cloth tape reel of the filter rod forming machine can increase the stability of the traction.

8. The present invention is provided with a first vacuum cooling setting sleeve and a second vacuum cooling setting sleeve, which can quickly complete the structure, shape and size setting of the cooling master batch parison and the cooling tube parison.

9. The present invention is provided with a first pressure sensor and a second pressure sensor, which can ensure that the pressure of the raw material and the cooling masterbatch is controllable and adjustable during the melting process.

10. The present invention is provided with a flying scissor head. Since the flying scissors head and the product in the cooling section are in a synchronous operation state, the cut end face of the product in the cooling section can be kept flush, and the shearing effect is good.

Description of drawings

Fig. 1 shows the structural representation of a specific embodiment of the cooling filter rod of the present invention;

Figure 2 shows a schematic cross-sectional view of a specific embodiment of the cooling pipe of the present invention;

Figure 3 shows a schematic cross-sectional view of a specific embodiment of the hollow filter rod of the present invention;

4 shows a schematic cross-sectional view of a specific embodiment of the second solid filter rod of the present invention;

Fig. 5 shows the structural schematic diagram of the extruder, the second cooling/air drying device and the second shearing device of the present invention;

Fig. 6 shows the thermogravimetric curve schematic diagram of PLA/PBAT blending series samples of the present invention;

Figure 7 shows a schematic diagram of the tensile properties of the PLA/PBAT blend series of samples of the present invention;

Figure 8 shows a DSC (differential scanning calorimetry) analysis chart of the PLA/PBAT blend series of samples of the present invention when scanned at 40 degrees Celsius/min.

Among them, 1-cooling pipe; 11-air flow channel; 2-cooling filter rod; 3-extruder; 4-second cooling/air drying device; 5-second shearing device; 6-hollow filter rod; 7-th Two solid filter rods

Embodiments of the present invention

The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

The fully degradable cooling firmware of the present invention includes: a fully degradable cooling master batch for reducing the temperature of flue gas; the cooling master batch is made of various fully degradable materials and solubilizers. The cooling masterbatch can be completely degraded and has good environmental protection; and can realize the cooling of the flue gas at the inlet end of the heat-not-burn cigarette without affecting the suction resistance and filtration efficiency of the cooling filter rod, and has good cooling effect and good stability.

In a specific embodiment, the various fully degradable materials include PLA (polylactic acid), PCL (polycaprolactone), TPEE (thermoplastic polyester elastomer), PBAT (butylene adipate and terephthalate) Copolymers of butylene formate), PBS (polybutylene succinate), PP (polypropylene), and various substances in PE (polyethylene).

In a specific embodiment, the components of various fully degradable materials and the proportions of each component are polylactic acid: polycaprolactone: copolymerization of butylene adipate and butylene terephthalate Material = 1:2:7, copolymer of butylene adipate and terephthalate: thermoplastic polyester elastomer = 2:8 or polypropylene: polybutylene succinate: Polycaprolactone = 3:3:6.

In a specific embodiment, the solubilizer includes one or more of PR023-7, ADR, 115C, isopropanol, maleic anhydride, epoxy compatibilizer, polyethylene glycol and polycaprolactone; The solubilizer can effectively improve the mixing effect of various fully degradable materials, and is convenient for obtaining raw materials for granulation.

In a specific embodiment, the mass fraction of the solubilizer in the cooling masterbatch is 0.3-1.5%.

In a specific embodiment, as shown in FIG. 1 and FIG. 2 , the fully degradable cooling firmware further includes a fully degradable cooling pipe 1 for reducing flue gas. The inside of the cooling pipe 1 is provided with an airflow channel 11 penetrating both ends in the axial direction and used for the passage of flue gas. The cooling tube 1 is made of cooling masterbatch. The cooling pipe 1 can be completely degraded, and has good environmental protection; and can realize the cooling of the smoke at the inlet end of the heat-not-burn cigarette without affecting the suction resistance and filtration efficiency of the cooling filter rod 2, and has good cooling effect and stability. it is good.

In a specific embodiment, the airflow channel 11 includes a full-through hollow cavity, a spoked hollow cavity or a non-through hollow cavity. Preferably, as shown in FIG. 2 , the air flow channel 11 is a spoke-type hollow cavity, which can increase the contact area between the flue gas and the air flow channel, prolong the circulation and residence time of the flue gas in the air flow channel, and thus can improve the efficiency of the flue gas and the flow rate. Contact collision effect of a fully degradable material.

In a specific embodiment, the spoke-type hollow cavity includes a spiral spoke-type structure, which can not only improve the contact and collision effect between the smoke and various fully degradable materials, but also has good aesthetics.

The preparation method of the fully degradable cooling firmware of the present invention comprises the following steps:

(1) Obtain a variety of fully degradable materials and mix them, and add a solubilizer during the mixing process to obtain raw materials for granulation.

(2) Extrusion and granulation are used to extrude and granulate the raw materials used for granulation to obtain fully degradable cooling masterbatches.

In a specific embodiment, drying a variety of fully degradable materials can effectively remove moisture and prevent hydrolysis and cracking of raw materials during subsequent heating and melting. Wherein, the drying temperature is 60-80 degrees Celsius. The drying time is 2 to 4 hours.

In a specific embodiment, using hot air to dry a variety of fully degradable materials is simple and efficient, and has a good drying effect.

In a specific embodiment, the raw material is extruded and granulated by extrusion and granulation process, and the process of obtaining the cooling master batch includes:

Determine the extruder, the first shaping device, the first cooling/air drying device and the first shearing device;

The raw material is placed in the extruder, so that the raw material is melted, plasticized and extruded to form a cooling masterbatch parison;

Place the cooling masterbatch parison in the first shaping device to complete the structure, shape and size setting;

Use the first cooling/air-drying device to cool and/or air-dry and solidify the shaped cooling masterbatch parison;

The solidified cooling masterbatch parison is cut into pellets by using the first shearing device to obtain the cooling masterbatch.

In a specific embodiment, the first setting device includes a first vacuum cooling setting sleeve for setting the structure, shape and size of the cooling masterbatch parison, which can quickly complete the structure and shape of the cooling masterbatch parison and sizing. Wherein, the temperature in the first vacuum cooling and shaping sleeve is 30-60 degrees Celsius, which can ensure the cooling and shaping effect of the cooling masterbatch parison, and avoid quenching shrinkage of the cooling masterbatch parison.

In a specific embodiment, the first cooling/air-drying device includes an air-cooled conveyor belt for transferring the cooling masterbatch parison and cooling and solidifying it, which can effectively cool and solidify the cooling masterbatch parison, and has a simple structure and convenient use. When in use, the cooled master batch parison is transported to the first shearing device through an air-cooled conveyor belt for dicing.

In a specific embodiment, the air-cooled conveyor belt includes a conveyor belt for conveying the cooling master batch parison, and an air cooling part for cooling and solidifying the cooling master batch parison is provided on the conveyor belt. Among them, the temperature of the air cooling part is 20 to 30 degrees Celsius.

In a specific embodiment, the first shearing device includes a pelletizer for dicing the cooled masterbatch parison, which can stably cut the cooled masterbatch parison with good uniformity.

In a specific embodiment, the cooling masterbatch is packaged by a first packaging machine.

In a specific embodiment, the screw of the extruder and/or the extrusion die is provided with a first pressure sensor, and the first pressure sensor is connected to the first servo motor, which can ensure that the pressure of the raw material is controllable during the melting process Adjustable.

In a specific embodiment, the raw materials are extruded and granulated using extrusion and granulation processes, and the process of obtaining the cooling masterbatch includes further comprising: determining a first feeding device for quantitatively placing the raw materials in the extrusion In the machine, it can improve the stability of the extruded material.

In a specific embodiment, an extrusion process is used to prepare the cooling masterbatch into a cooling tube 1 (as shown in Figures 1 and 2).

In a specific embodiment, the process of preparing the cooling masterbatch into the cooling pipe 1 (as shown in Figure 1 and Figure 2 ) by an extrusion molding process includes:

Determine the extruder 3, the second setting device, the second cooling/air drying device 4, the dislocation pulling device and the second shearing device 5 (as shown in Figure 5);

The cooling masterbatch is placed in the extruder 3, so that the cooling masterbatch is melted, plasticized and extruded to form a cooling tube parison;

Place the cooling tube parison in the second setting device to complete the structure, shape and size setting;

Use the second cooling/air-drying device 4 to cool and/or air-dry and solidify the shaped cooling tube parison;

The cured cooling tube parison is dislocated, twisted and pulled by a dislocation traction device to form a cooling section product;

Use the second shearing device 5 to cut off the product in the cooling section to obtain the cooling tube 1 (as shown in Figures 1 and 2).

In a specific embodiment, the inside of the extruder 3 is provided with a material conveying part, a material melting part, a melt conveying part, a homogenizing conveying part, a heating and heat preservation part and an extrusion die head; wherein,

The material conveying part is used to convey the cooling masterbatch to the inside of the extruder 3;

The material melting part is used to make the cooling masterbatch reach the melting temperature and gradually melt into a melt;

The melt conveying part is used for stirring and mixing the melt along the screw of the extruder 3 and conveying it to the homogenizing conveying part; wherein, the temperature of the melt conveying part is required to be close to the melting point of the raw material, which can ensure sufficient melting and plasticizing of the raw material. effect.

The homogenizing conveying part is used to continuously melt and stabilize the melt and convey it to the heating and heat preservation part;

The heating and heat preservation part is used to stabilize the temperature of the melt;

The extrusion die head is used to extrude the melt and form a tubular strand.

In a specific embodiment, the material conveying part is provided with a first temperature control part for controlling the conveying temperature of the cooling masterbatch, which can stably control the conveying temperature of the cooling masterbatch and has good reliability. The material melting part is provided with a second temperature control part for controlling the melting temperature of the cooling masterbatch, which can stably control the melting temperature of the cooling masterbatch and has good reliability. The melt conveying part is provided with a third temperature control part for controlling the mixing and conveying temperature of the melt along the screw of the extruder 3, which can stably control the mixing and conveying of the melt along the screw of the extruder 3 temperature and good reliability. The homogenizing and conveying part is provided with a fourth temperature control part for controlling the continuous melting and stable temperature of the melt and the conveying temperature, which can stably control the temperature at which the melt continues to melt, stabilize and convey, and has good reliability. The heating and heat preservation part is provided with a fifth temperature control part for stabilizing the temperature of the melt, so that the temperature of the melt can be stably controlled. The extrusion die head is provided with a sixth temperature control part for controlling the temperature of extruding the melt and forming the tubular strand, which can stably control the temperature of extruding the melt and forming the tubular strand, and has good reliability.

In a specific embodiment, the first temperature control part is used to keep the conveying temperature of the cooling masterbatch at 110-140 degrees Celsius. The second temperature control part is used to keep the melting temperature of the cooling masterbatch at 140-180 degrees Celsius. The third temperature control part is used to keep the temperature at which the melt is stirred, mixed and conveyed along the screw of the extruder 3 at 150-180 degrees Celsius. The fourth temperature control part is used to keep the temperature at which the melt continues to be melted stably and transported at 150-180 degrees Celsius. The fifth temperature control part is used to keep the stable temperature of the melt at 140-165 degrees Celsius. The sixth temperature control part is used to keep the temperature at which the melt is extruded and formed into a tubular strand at 130-150 degrees Celsius, and can be adjusted according to the extrusion state of the material.

In a specific embodiment, the second setting device includes a second vacuum cooling setting sleeve for setting the structure, shape and size of the cooling tube parison, which can quickly complete the structure, shape and size setting of the cooling tube parison. Wherein, the temperature of the second vacuum cooling and shaping sleeve is 30-60 degrees Celsius, which can ensure the cooling and shaping effect of the cooling tube parison, and avoid the rapid cooling and shrinkage of the cooling tube parison.

In a specific embodiment, the length of the second vacuum cooling setting sleeve is 0.1 cm to 1 meter, which can prolong the setting time of the cooling tube parison, and the setting effect will be better, so that the structure, shape and size of the cooling firmware parison It is more stable, and at the same time, the substantial extension of the second vacuum cooling setting sleeve can effectively improve the production efficiency.

In a specific embodiment, the second cooling/air-drying device 4 includes a cooling tank 41 for containing the cooling liquid and cooling and solidifying the cooling tube parison, which can achieve dimensional stability of the cooling tube parison. The cooling liquid includes a first cooling liquid and a second cooling liquid. The temperature of the first cooling liquid is 10-20 degrees Celsius, and the temperature of the second cooling liquid is 20-30 degrees Celsius. After the cooling tube parison comes out of the cooling tank 41, the solidification and cooling of the cooling tube parison can be quickly completed.

In a specific embodiment, the second cooling/air-drying device 4 further includes a suction tape for further cooling and solidifying the cooling tube parison, and the cooling tube parison can be further cooled and solidified by using the suction tape type cold air cooling method, The cooling and shaping effect of the spokes inside the cooling tube parison is better. At the same time, the cold air of the suction ribbon can also remove the moisture on the parison of the cooling tube, so as to prepare for the cutting of the parison of the cooling tube.

In a specific embodiment, the dislocation pulling device includes a dislocation twisting part for dislocating and twisting the cured cooling tube parison and a filter rod forming machine cloth belt for pulling the dislocation and twisting cooling tube parison The disc traction part can obtain the cooling section products that meet the requirements. Wherein, the dislocation and twisted part can increase the contact area between the flue gas and the airflow channel, and improve the contact and collision effect between the flue gas and the raw material, thereby improving the cooling effect of the flue gas. The pulling part of the cloth tape reel of the filter rod forming machine can increase the stability of the pulling.

In a specific embodiment, the second shearing device 5 includes a flying scissor head for cutting the product in the cooling section. Since the flying scissors head and the product in the cooling section are in a synchronous operation state, the cutting end surface of the product in the cooling section can be kept flush. , the cutting effect is good.

In a specific embodiment, a second pressure sensor is provided on the screw and/or the extrusion die head of the extruder 3, and the second pressure sensor is connected to the second servo motor, which can ensure that the cooling masterbatch is melted in a zoned process. The medium pressure is controllable and adjustable.

In a specific embodiment, the process of preparing the cooling masterbatch into the cooling tube 1 by the extrusion molding process further includes: determining a second feeding device for quantitatively placing the cooling masterbatch in the extruder 3, which can improve the Stability of extruded material.

In a specific embodiment, the cooling tube 1 is packaged by a second packaging machine.

The present invention provides the use of the fully degradable cooling firmware according to the present invention and the fully degraded cooling firmware prepared by the above-mentioned method of the present invention in a cooling filter rod 2 for heat-not-burn cigarettes (as shown in Figure 1 ); the uses include: Application of cooling masterbatch in cooling filter rod; and/or application of cooling tube 1 in cooling filter rod 2 (as shown in Figure 1 and Figure 2).

In a specific embodiment, the cooling filter rod 2 includes a plurality of first solid filter rods, and particle segments are arranged between adjacent first solid filter rod segments. The particle section includes a hollow tube body and a cooling masterbatch placed in the hollow tube body. The first solid filter rod is used to block the cooling masterbatch. The first solid filter rod is made of the first polymer fiber and plasticizer or adhesive, which can effectively block the cooling masterbatch and prevent the cooling masterbatch from flowing out of the particle section.

In a specific embodiment, the first polymer fibers comprise polylactic acid tow, polypropylene tow, and/or cellulose diacetate tow.

In a specific embodiment, as shown in FIGS. 1 to 4 , the cooling filter rod 2 includes a hollow filter rod 6 and/or a second solid filter rod 7 , and the second solid filter rod 7 and/or the hollow filter rod 6 One end and/or both ends of the cooling pipe 1 are connected.

In a specific embodiment, as shown in FIG. 1 , the cooling filter rod 2 includes a hollow filter rod 6 and a second solid filter rod 7 , and a cooling pipe disposed between the hollow filter rod 6 and the second solid filter rod 7 1.

In a specific embodiment, the second solid filter rod 7 is made of a second polymer fiber and a plasticizer or adhesive.

In a specific embodiment, the second polymer fibers comprise polylactic acid tow, polypropylene tow, and/or cellulose diacetate tow.

In a specific embodiment, the hollow filter rod 6 is made of a third polymer fiber and a plasticizer or adhesive.

In a specific embodiment, the third polymer fibers comprise polylactic acid tow, polypropylene tow, and/or cellulose diacetate tow.

In a specific embodiment, a hollow cavity portion 61 is provided inside the hollow filter rod 6 . The hollow cavity portion 61 includes an axial through-type hollow cavity or an axial non-through-type hollow cavity. The hardness of the hollow filter rod is more than 60% of the hardness of the solid filter rod of the same material and outer diameter.

In a specific embodiment, a filter rod ternary composite equipment (for the composite cooling tube 1 , the hollow filter rod 6 and the second solid filter rod 7 ) is used to prepare the cooling filter rod 2 for heating non-burning cigarettes.

A specific embodiment is listed below:

Embodiment 1: the preparation of cooling master batch

Select polylactic acid, polycaprolactone, thermoplastic polyester elastomer, copolymer of butylene adipate and butylene terephthalate, polybutylene succinate, polypropylene and polyethylene of 2 to 4 kinds to obtain a variety of fully degradable materials. It is blended according to a certain ratio and dried, and in the process of mixing, PR023-7, ADR, 115C, isopropanol, maleic anhydride, and epoxy with a mass fraction of 0.3% to 1.5% are added for compatibilization. As a solubilizer, one of polyethylene glycol, polyethylene glycol, and polycaprolactone is used as a solubilizer to form a raw material for granulation. The raw material is placed inside a twin-screw extruder for melt plasticization and extrusion to form a cooling masterbatch parison. Using an air-cooled conveyor belt, the cooled masterbatch parison is transported to a pelletizer for pelletizing.

Further, the drying temperature is 60-80 degrees Celsius.

Further, polylactic acid, polycaprolactone, thermoplastic polyester elastomer, copolymer of butylene adipate and butylene terephthalate, polybutylene succinate were 2 to 4 substances in polypropylene and polyethylene and the solubilizer are mixed at high speed, and the mixing speed is 3000 to 7000 rpm.

Further, the first feeding device is used to quantitatively place the raw materials inside the twin-screw extruder for melt plasticization and extrusion.

Further, the melting temperature is 170 to 210°C.

Further, the air-cooled conveyor belt includes a conveyor belt for conveying the cooling master batch parison, and an air cooling portion for cooling and solidifying the cooling master batch parison is provided on the conveyor belt.

Further, the pelletizer is provided with a pelletizing cutter head for pelletizing, which can stably pelletize the cooled masterbatch parison.

Further, the particle size of the cooling master batch is 0.1-0.4 mm.

Further, the cooling masterbatch is packaged by the first packaging machine.

Further, it is determined that the components of various fully degradable materials and the ratio of each component are polylactic acid: copolymer of butylene adipate and butylene terephthalate=7:3; its processability Stable, the product has moderate softness and hardness, and is conducive to subsequent processing. Among them, the basic characteristics of polylactic acid E-1300 are shown in Table 1.

Example 2: Preparation of Cooling Tube

Using polylactic acid (E-1300) and a copolymer of butylene adipate and terephthalate to prepare a cooling pipe, the cooling pipe includes the following steps: purchasing vacuum-packed biodegradable plastics that can be used directly after unpacking, If the package is not used up after opening, it should be sealed and stored again. The biodegradable plastic is prepared into a cooling masterbatch, and the cooling masterbatch is placed in the extruder 3 for melting, plasticizing and extrusion to form a cooling tube parison. Among them, the temperature of the material conveying part in the extruder 3 is kept at 140 degrees Celsius, the temperature of the material melting part in the extruder 3 is kept at 150 degrees Celsius, and the temperature of the melt conveying part in the extruder 3 is kept at 160 degrees Celsius, and the extrusion molding The temperature of the homogenization and conveying part in the extruder 3 is kept at 165 degrees Celsius, the temperature of the heating and heat preservation part in the extruder 3 is kept at 165 degrees Celsius, the temperature of the extrusion die head in the extruder 3 is kept at 150 degrees Celsius, and the extrusion die is kept at 150 degrees Celsius. The temperature of the head can be appropriately adjusted according to the extrusion of the cooling tube parison. If the viscosity of the extruded melt is too low, making it difficult to form the cooling tube parison, lower the temperature appropriately; if the material is not plasticized properly, raise the temperature appropriately. In addition, the rotational speed and pulling speed of the screw of the extruder 3 can be appropriately adjusted according to the wall thickness and inner diameter of the cooling pipe. Shape the cooling tube parison. The shaped cooling tube parison is cooled and solidified by the cooling liquid in the cooling tank 41 . Among them, the temperature of the cooling liquid is less than or equal to 25 degrees Celsius. If it is difficult to cure and form, the temperature of the cooling liquid should be further reduced. The cured cooling tube parison is dislocated, twisted and pulled by a dislocation traction device to form a cooling section product. Cut off the product in the cooling section to obtain the cooling pipe 1.

Further, taking the cooling tube with a circumference of 6.95mm (mm) as an example, the typical technical parameters are shown in Table 2.

Compared with the products of the same type, the cooling pipe 1 obtained in the second embodiment has the following advantages:

1) When the length of the cooling tube 1 is the same as that of the same type of product, the weight of the cooling tube 1 is only about 80% of the wrinkle form (film wrinkle), the material consumption is low, and the economy is good.

2) When the length of the cooling tube 1 is the same as that of the same type of product, the cooling area of the cooling tube 1 is 2.7 times that of the round tube with film (paper tube with polylactic acid film). Considering that the porosity is only 86% of that of the round tube with film, The actual cooling efficiency of the cooling tube 1 is 2.3 times that of the round tube with film.

Example 3: Preparation of PLA/PBAT blend series samples

The PLA/PBAT copolymer was placed in a vacuum drying oven and dried at 50 degrees Celsius for 4 hours; then PLA/PBAT was added to an internal mixer (SU-70L, Jiangsu Suyuan Rubber and Plastic Technology Co., Ltd.) in different proportions and dried at 180 °C. Different PLA/PBAT blend series samples were prepared by mixing for 3 minutes under the processing conditions of degrees Celsius/120 rpm (revolutions per minute). The code and composition of the prepared blend series samples are shown in Table 3.

Further, the thermal weight loss of PLA/PBAT blend series samples was determined. Figure 6 is the thermogravimetric curve of the PLA/PBAT blend series samples. Among them, curve 1 represents the thermal weight loss curve of pure PBAT. The temperature reaches about 400 degrees Celsius, and its mass retention rate is basically 100%, indicating that the thermal stability of PBAT is very high. The thermal decomposition temperature of the PLA/PBAT blend series samples was determined, as shown in Table 4.

It can be seen from the above table that the temperature of PLA/PBAT blends at a weight loss rate of 5% is slightly higher than that of pure PLA; the maximum temperature of PLA/PBAT blends at a weight loss rate of 50% and 90% Compared with pure PLA, the increase was 42.73 degrees Celsius and 71.21 degrees Celsius, respectively. The addition of PBAT reduces the high temperature decomposition rate of PLA, that is, increases its thermal stability and has good safety.

Further, the material mechanical properties of PLA/PBAT were determined. Specifically, the PLA/ PBAT blending series samples were prepared and tested in accordance with ASTM D-638 Type IV standard samples; all samples were hot-pressed under the conditions of 190 degrees Celsius and 10 MPa for 3 minutes, cooled and formed, and then cut with standard cutters The standard samples were taken out, and then the tensile properties were tested with a HT-9112 universal material testing machine from Hongda Instrument Company at a tensile speed of 50 mm/min at 25 degrees Celsius. The values of all mechanical properties under each composition are the average value of the test data of 5 splines, as shown in Table 5.

Further, the tensile properties of the PLA/PBAT blend series samples were determined. Figure 7 is a schematic diagram of the tensile properties of PLA/PBAT blend series samples. The tensile strength (σf) of pure PLA is as high as 48.3 MPa, while the elongation at break (εf) is only 3.7 %; in the PLAxPBATy blend series samples, with the increase of PLA content, the fracture of the PLAxPBATy blend series samples The elongation values increased significantly. For example: when the content of PBAT is only increased by 10%, the elongation at break value of PLA ₉₀ PBAT ₁₀ has increased to 132.6%, while the tensile strength has only dropped to 45.5 MPa; with the addition of PBAT, the tensile strength of PLAxPBATy It gradually decreased. When the PBAT content reached 20%, the tensile strength of PLA80PBAT20 decreased to 39.7 MPa. With the continuous decrease of PBAT content, the decreasing trend of the strength of PLA became more and more obvious. According to the above data analysis, in the process of extrusion molding of cooling tube 1, the added content of PBAT should not exceed 20%.

Further, the material thermal properties of PLA/PBAT were determined. Specifically, the prepared PLA and PLAxPBATy series samples were analyzed by TA company Q100 differential scanning calorimetry analyzer (differential scanning calorimetry). Scanning calorimeter, DSC) to analyze its melting point, crystallinity and other thermal properties. Within the detection temperature range, adjust the reference line so that its fluctuation range is less than 0.04mW (milliwatts), so that the maximum deviation of the heat of fusion is within ±3J/g (joule per gram), that is, for crystallinity, about only 1% error. The instrument is calibrated with pure indium (indium) fusion heat of 28.4 joules per gram. All thermal analysis experiments are carried out at a nitrogen flow rate of 45ml/min (milliliters per minute), and the heating rate is 40°C/min (degrees Celsius per minute). The heating temperature range is at your own risk. 80 degrees Celsius to 200 degrees Celsius. From the DSC (differential scanning calorimetry) curve, the heat of fusion ΔH and the degree of crystallinity can be known. The crystallinity is calculated according to formula (1):

in,

is the crystallinity of the sample; is the melting enthalpy of the sample; is the melting enthalpy of PLA complete crystallization 93.6Jg ^{-1 [80]} ; is the weight content of PLA in the sample.

Figure 8 shows (a) PLA, (b) PLA ₉₀ PBAT ₁₀ , (c) PLA ₈₀ PBAT ₂₀ , (d) PLA ₇₀ PBAT ₃₀ , (e) PLA ₆₀ PBAT ₄₀ , (f) PLA ₅₀ PBAT ₅₀ and (g) PLA 50 PBAT 50 ) DSC analysis of a PBAT sample scanned at 40°C/min. From Figure 8(a), it can be observed that the glass transition temperature of PLA is 60 degrees Celsius, and the melting endothermic peak temperature of PLA is 171.8 degrees Celsius. A broad endothermic peak corresponding to PBAT can be seen from Fig. 8(g), with a peak around 55°C. When PBAT was added to PLA, the crystallinity, melting temperature and recrystallization onset temperature of PLAxPBATy samples decreased gradually with the increase of PBAT content. In contrast, the glass transition temperature values of the PLAxPBATy samples increased gradually with the increase of PBAT content. For example, when the PBAT content was increased from 0 to 20 and 50 wt% (wt%), the glass transition temperature values of PLA in the PLAxPBATy blend samples increased from 62.8 degrees Celsius to 63 degrees Celsius and 63.6 degrees Celsius. During the extrusion reaction of the PLAxPBATy sample, the epoxy group on the PBAT molecule reacts with the carboxyl group at the end of the PLA molecule to form an ester group. These "lengthened" or "cross-linked" PLA molecules will crystallize during cooling or heating during scanning. Inhibit the movement of PLA segments, reduce the crystallization rate, crystallization perfection and crystallinity; so that the glass transition temperature of the PLAxPBATy sample increases gradually with the increase of PBAT content, while the melting temperature, crystallinity and recrystallization onset temperature On the contrary, it gradually decreased with the increase of PBAT content. The reduction of the melting endothermic peak value of PLA and the reduction of the recrystallization temperature are both beneficial to the endothermic efficiency of the flue gas cooling section in the cooling filter rod 2, and play a beneficial role in the cooling of the flue gas.

The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications belong to the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

A fully degradable cooling firmware is characterized in that it comprises a fully degradable cooling master batch for reducing the temperature of flue gas; the cooling master batch is made of various fully degradable materials and solubilizers.
The fully degradable cooling firmware according to claim 1, wherein the various fully degradable materials include polylactic acid, polycaprolactone, thermoplastic polyester elastomer, butylene adipate and terephthalic acid Copolymers of butylene succinate, polybutylene succinate, polypropylene and various substances in polyethylene.
The fully degradable cooling firmware according to claim 2, wherein the components of the various fully degradable materials and the ratio of each component are the polylactic acid: the polycaprolactone: the hexamethylene Copolymer of butylene terephthalate and butylene terephthalate=1:2:7, the copolymer of butylene adipate and butylene terephthalate: the thermoplastic polymer Ester elastomer = 2:8 or the polypropylene: the polybutylene succinate: the polycaprolactone = 3:3:6.
The fully degradable cooling firmware according to claim 1, wherein the solubilizer comprises PR023-7, ADR, 115C, isopropanol, maleic anhydride, epoxy compatibilizer, polyethylene glycol and polyethylene One or more of caprolactones.
The fully degradable cooling firmware according to claim 4, wherein the mass fraction of the solubilizer in the cooling master batch is 0.3-1.5%.
The fully degradable cooling fixture according to claim 1, wherein the fully degradable cooling fixture comprises a fully degradable cooling pipe for reducing smoke; The air flow channel used for the flue gas to pass through; the cooling pipe is made of the cooling master batch.
The fully degradable cooling firmware according to claim 6, wherein the airflow channel comprises a full-through hollow cavity, a spoked hollow cavity or a non-through hollow cavity.
A method for preparing the fully degraded cooling firmware according to any one of claims 1 to 7, characterized in that, comprising the following steps:

Obtaining and mixing the multiple fully degradable materials, and adding the solubilizer during the mixing process to obtain raw materials for granulation;

The raw material is extruded and granulated by an extrusion and granulation process to obtain the fully degradable cooling masterbatch.
The method for preparing a fully degradable cooling firmware according to claim 8, wherein the various fully degradable materials are dried; the drying temperature is 60-80 degrees Celsius; the drying time is 2-4 Hour.
The preparation method of the fully degradable cooling firmware according to claim 8, wherein the raw material is extruded and granulated by extrusion and granulation process, and the process of obtaining the cooling master batch comprises:

Determine the extruder, the first sizing device, the first cooling/air drying device and the first shearing device;

placing the raw material in the extruder so that the raw material is melt-plasticized and extruded to form the cooling masterbatch parison;

The cooling master batch parison is placed in the first shaping device for structure, shape and size setting;

Use the first cooling/air-drying device to cool and/or air-dry and solidify the shaped cooling masterbatch parison;

The solidified cooling master batch parison is cut into pellets by using the first shearing device to obtain the cooling master batch.
The method for preparing a fully degradable cooling firmware according to claim 10, wherein the first setting device comprises a first vacuum cooling setting sleeve for setting the structure, shape and size of the cooling masterbatch parison The first cooling/air-drying device includes an air-cooled conveyor belt for transferring the cooling master batch parison and cooling and solidifying it; Granulator.
The method for preparing a fully degradable cooling firmware according to claim 10, wherein a first pressure sensor is provided on the screw and/or the extrusion die of the extruder, and the first pressure sensor is connected to the first pressure sensor. servo motor.
The preparation method of the fully degraded cooling firmware according to claim 10, wherein the raw material is extruded and granulated by an extrusion and granulation process, and the process of obtaining the cooling master batch also comprises: determining the first a feeding device for quantitatively placing the raw material in the extruder.
The method for preparing a fully degradable cooling firmware according to claim 8, characterized in that, the cooling masterbatch is prepared into the cooling pipe by an extrusion process.
The method for preparing a fully degradable cooling firmware according to claim 14, wherein the process of preparing the cooling masterbatch into the cooling tube by the extrusion molding process comprises:

Determine the extruder, the second sizing device, the second cooling/air drying device, the offset pulling device and the second shearing device;

The cooling master batch is placed in the extruder, so that the cooling master batch is melted, plasticized and extruded to form the cooling tube parison;

placing the cooling tube parison in the second shaping device for structure, shape and size setting;

Use the second cooling/air-drying device to cool and/or air-dry and solidify the shaped cooling tube parison;

Utilize the dislocation pulling device to perform dislocation twisting and pulling on the solidified cooling tube parison to form a cooling section product;

The cooling section product is cut by the second shearing device to obtain the cooling tube.
The method for preparing a fully degradable cooling firmware according to claim 15, wherein the extruder is provided with a material conveying part, a material melting part, a melt conveying part, a homogenizing conveying part, a heating and insulating part, and a heating and insulating part. Extrusion die head;

The material conveying part is used for conveying the cooling masterbatch to the inside of the extruder;

The material melting part is used to make the cooling master batch reach the melting temperature and gradually melt into a melt;

The melt conveying part is used for stirring and mixing the melt along the screw of the extruder and conveying it to the homogenizing conveying part;

The homogenizing conveying part is used to continue melting and stabilizing the melt and convey it to the heating and heat preservation part;

The heating and heat preservation part is used for stabilizing the temperature of the melt;

The extrusion die head is used to extrude the melt and form a tubular strand.
The preparation method of the fully degradable cooling firmware according to claim 16, wherein the material conveying part is provided with a first temperature control part for controlling the conveying temperature of the cooling master batch; the material melting part is provided with a first temperature control part for a second temperature control part for controlling the melting temperature of the cooling masterbatch; the melt conveying part is provided with a third temperature control part for controlling the temperature of the melt to be stirred, mixed and conveyed along the screw of the extruder The homogenizing conveying part is provided with a fourth temperature control part for controlling the melt to continue to melt and stabilize and convey the temperature; the heating and heat preservation part is provided with a fifth temperature control part for stabilizing the temperature of the melt; The extrusion die head is provided with a sixth temperature control part for controlling the temperature of the melt extrusion and forming the tubular strand.
The method for preparing a fully degradable cooling firmware according to claim 17, wherein the first temperature control part is used to keep the conveying temperature of the cooling masterbatch at 110-140 degrees Celsius; the second temperature control The third temperature control part is used to keep the temperature at which the cooling masterbatch melts at 140-180 degrees Celsius; the third temperature control part is used to keep the temperature at which the melt is stirred, mixed and transported along the screw of the extruder. at 150-180 degrees Celsius; the fourth temperature control part is used to make the melt continue to melt and stabilize and the conveying temperature is kept at 150-180 degrees Celsius; the fifth temperature control part is used to stabilize the melt The temperature is maintained at 140-165 degrees Celsius; the sixth temperature control part is used to keep the temperature at which the melt is extruded and formed into the tubular strand at 130-150 degrees Celsius.
The method for preparing a fully degradable cooling firmware according to claim 15, wherein the second shaping device comprises a second vacuum cooling shaping sleeve for shaping the structure, shape and size of the cooling tube parison; The second cooling/air-drying device includes a cooling tank for holding cooling liquid and cooling and solidifying the cooling tube parison; the dislocation traction device includes a dislocation for dislocating and twisting the solidified cooling tube parison The twisting part and the pulling part of the tape reel of the filter rod forming machine for pulling the dislocated and twisted cooling tube parison; the second shearing device includes a flying scissor head for cutting the cooling section product.
The method for preparing a fully degradable cooling firmware according to claim 19, wherein the cooling/air-drying device further comprises a ribbon suction tape for further cooling and solidifying the cooling tube parison.
The method for preparing a fully degradable cooling firmware according to claim 16, wherein a second pressure sensor is provided on the screw of the extruder and/or the extrusion die head, and the second pressure sensor is Connect the second servo motor.
The preparation method of the fully degradable cooling firmware according to claim 15, wherein the process of preparing the cooling masterbatch into the cooling pipe by using the extrusion molding process further comprises: determining a second feeding device, using The cooling masterbatch is quantitatively placed in the extruder.
Use of the fully degradable cooling fastener according to any one of claims 1 to 7 and the fully degraded cooling fastener prepared by the method according to any one of claims 8 to 22 in a cooling filter rod for heat-not-burn cigarettes ; The uses include: the use of the cooling master batch in the cooling filter rod; and/or the use of the cooling pipe in the cooling filter rod.
The use according to claim 23, wherein the cooling filter rod comprises a plurality of first solid filter rods, and particle segments are arranged between adjacent first solid filter rod segments; the particle segments comprise A hollow tube body and the cooling master batch placed in the hollow tube body; the first solid filter rod is used to block the cooling master batch; the first solid filter rod adopts the first polymer fiber and plasticizer or adhesive; the first polymer fiber includes polylactic acid tow, polypropylene tow and/or cellulose diacetate tow.
The use according to claim 23, wherein the cooling filter rod comprises a hollow filter rod and/or a second solid filter rod, and one end of the second solid filter rod and/or the hollow filter rod and/or the cooling pipe connected at both ends; the second solid filter rod is made of second polymer fibers and plasticizers or adhesives; the second polymer fibers include polylactic acid tow, poly Propylene tow and/or cellulose diacetate tow; the hollow filter rod is made of third polymer fiber and plasticizer or adhesive; the third polymer fiber includes polylactic acid tow, polypropylene Tow and/or cellulose diacetate tow; the hollow filter rod is provided with a hollow cavity inside, and the hollow cavity includes an axial through-type hollow cavity or an axial non-through-through hollow cavity; The hardness of the hollow filter rod is more than 60% of the hardness of the solid filter rod of the same material and outer diameter.