CN116003903A - Porous material, preparation method and application thereof - Google Patents

Abstract

A porous substance with viscoelastic properties, the substrate of the porous substance is composed of particles, at least one viscoelastic layer is formed outside the substrate, and the particles are embedded in the viscoelastic layer. The particles are geometric bodies of no particular shape, and the size of the particles is between 0.7 mm and 1.4 mm. The particles include solid particles and liquid particles. The thickness of the viscoelastic layer is at least 0.1mm. The preparation method of the porous substance with viscoelastic properties includes the following steps: (1) fully mixing natural particles or artificial particles with polyolefin elastomer; (2) forming a viscoelastic layer under certain conditions And embedding particles in the viscoelastic layer; (3) The particles adopt the process of encapsulating the particles with an encapsulation film. The invention also discloses a method for preparing a cigarette holder by using the porous material with viscoelastic properties, which breaks the industry practice that the heated cigarette support section must be solved by a hollow member, and has the dual advantages of particle structure cooling and flexible processing.

Description

A kind of porous material, its preparation method and application

technical field

The invention belongs to the technical field of tobacco product production, and relates to cooling granules for heating cigarette holders and a preparation method thereof.

Background technique

CN 103330283 B discloses a method for forming an encapsulated porous mass, which includes continuously introducing a matrix material into a mold cavity, said matrix material comprising a plurality of active particles and a plurality of binder particles, wherein the adhesive is bonded according to ASTM D1238 The melt flow index of the agent particles at 190°C and 15kg is less than or equal to 3.5g/10min; heating at least a portion of the matrix material to a temperature between 175°C and 300°C to bond the matrix material at multiple points of contact place, thereby forming a wrapped elongated porous substance, and radially cutting the wrapped elongated porous substance, thereby obtaining a wrapped porous substance; wherein forming the wrapped porous substance includes using the packaging as an inner liner of a mold cavity , and wherein the packaging is continuously fed through the mold cavity.

CN109691697A discloses an aerosol generating product, comprising an aerosol atomization unit and a flue gas cooling unit, and the flue gas cooling unit is located downstream of the gas flow direction generated by the aerosol atomization unit. The flue gas cooling unit includes basic particles, binder particles and wrapping materials; contact points are formed between the binder particles and the binder particles, the binder particles and the base particles, and the base particles and the base particles in multiple physical locations. Adhesive, rods wrapped with wrapping material to form a porous structure.

The direct particle-to-particle bonding is the core of the above-mentioned patents, leading to the most direct result that the hardness of the particle itself is superimposed on the space network particle matrix formed by the adhesive, and the combined hardness makes the final hardness of the porous material exceed 95%. The fact that there is essentially no elastic deformation due to high hardness can lead to various adverse effects during processing and subsequent application.

Contents of the invention

The object of the present invention is to provide a porous material with viscoelastic properties, its preparation method and application. The so-called viscoelasticity means that the product sinks under pressure, but does not show strong rebound force (such as clay sinking under pressure) , when the pressure is removed, the product will gradually return to its original shape (such as spring recovery).

In order to achieve the above object, the technical scheme adopted in the present invention comprises:

A porous substance with viscoelastic properties, the matrix material of the porous substance is composed of particles, at least one viscoelastic layer is formed outside the matrix material, and the particles are embedded in the viscoelastic layer.

The structural feature of the viscoelastic layer is that there is a wrapping material on the outside of the viscoelastic layer, including but not limited to molding paper, the viscoelastic layer interface and the outer surface formed by the wrapping material are formed between the viscoelastic layer and the wrapping material, and the viscoelastic layer The inner surface that forms a viscoelastic layer interface with the matrix material. Both the adhered particles on the inner surface of the viscoelastic interface layer and the particles wrapped by the viscoelastic interface layer can move in three dimensions.

Optionally, the particles are geometric bodies of no specific shape, and the size of the particles is between 0.7 mm and 1.4 mm.

Optionally, the particles include solid particles and liquid particles.

Optionally, the viscoelastic layer has a thickness of at least 0.1 mm.

The preparation method of the porous substance with viscoelastic properties comprises the following steps:

(1) Fully mix natural particles or artificial particles with polyolefin elastomer;

(2) Under certain conditions, a viscoelastic layer is formed and particles are embedded in the viscoelastic layer;

(3) The particles adopt the process of encapsulating the particles with an encapsulation film.

Optionally, the weight ratio of the particles to the polyolefin elastomer in step (1) is 50:50 to 90:10.

Optionally, the polyolefin elastomer is a copolymer obtained by polymerizing ethylene or propylene as the main polymerized unit and α-olefin as the comonomer.

Optionally, the α-olefin is an α-olefin with 4-8 carbons.

Optionally, the certain conditions in step (2) include heat exchange.

Optionally, the process of encapsulating the particles with the encapsulation film in step (3) refers to: fully mixing the particles with the polyolefin elastomer with viscoelastic properties to prepare the substrate; On the joint interface, the polyolefin elastomer naturally forms an adhesive film after heating, and the adhesive film forms a ring-shaped packaging adhesive film under the limitation of the wrapping material; the interface between the adhesive film and the wrapping material is flat and round, and the inner surface of the interface layer adheres to particles. That is to say, the viscoelastic layer, the particles adhered to the inner surface of the interface layer of the viscoelastic layer, and the particles wrapped by the interface layer of the viscoelastic layer can all move microscopically in three dimensions.

The particles inside the base material are connected on the polyolefin elastomer to form a point-shaped or grid-shaped adhesive film; the particles in the interface layer are connected to form a ring-shaped encapsulation adhesive film.

Optionally, the preparation method of the artificial granules in step (1) includes wet granulation, spray granulation and dry granulation.

The method for preparing a cigarette holder using the porous material with viscoelastic properties includes the following steps: passing the matrix material through the feeding funnel through the feeding path by natural gravity or closed positive pressure, and entering the filter rod forming cavity; The molding paper used for wrapping also enters the filter rod forming cavity together; a heating element is arranged outside the filter rod forming cavity to heat the filter rod forming cavity; Cavity protruding end; a cutter is set to cut the continuous strip after the particle-encapsulated film to obtain a particle-encapsulated film cigarette holder with a specified length and a specified circumference.

Optionally, by adjusting the packing density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closed pressure drop of the cigarette holder is controlled within 100-600 mm of water column.

Optionally, the matrix material is heated to 150°C to 300°C, the thickness of the viscoelastic layer is 0.1-0.9mm; heated to 175°C to 250°C, the thickness of the viscoelastic layer is 0.3-0.7mm; heated to 195 °C to 220 °C, the thickness of the viscoelastic layer is 0.4-0.6mm.

The method for preparing a cigarette holder by using the porous substance with viscoelastic properties includes the following steps: the granular processing raw material is moved to the feed belt through the positive pressure applied in the positive pressure silo, and the feed belt is made of air holes. The belt-shaped object is convenient for the negative pressure generated by the negative pressure element to be applied to the raw materials for particle processing through the air holes, and a continuous strip of particle accumulation is formed on the feeding belt; the feeding belt forms a circulating particle under the action of the driving roller. Transmission movement, under the action of the leveling cutter, the continuous strips of particle accumulation formed on the feeding belt are smoothed and corrected, so that the particle accumulation formed on the feeding belt is more in line with the needs of cigarettes; after passing through the leveling cutter , the continuous strips of particle accumulation formed on the feeding belt continue to move to the left, and through the action of the paper guide roller, the forming paper and the continuous strips of particles formed on the feeding belt move toward each other, and finally the forming is completed The paper wraps the continuous strips of particles on the feeding belt, and the blocking device cleans up the particles that have not completely fallen on the feeding belt to ensure that after the feeding belt rotates through the transmission roller, the The surface of the feed belt is clean and free of particles, and the cycle negative pressure suction process is completed; the heating unit heats and shapes the continuous strips of particles on the feed belt wrapped in the molding paper, and then under the action of the cutter, A particle-encapsulated film cigarette holder with specified length and specified circumference is obtained.

Optionally, by adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closed pressure drop of the cigarette holder is controlled within 30-100 mm of water column.

To illustrate from another angle: the base material of the porous material of the present invention is composed of particles, at least one viscoelastic layer is formed and the particles are embedded in the viscoelastic layer, and the inner surface of the viscoelastic layer interface layer is adhered to the particles and the viscoelastic layer by rolling equipment. The particles wrapped by the interface layer of the viscoelastic layer form strips under the action of the wrapping material. The thickness of the viscoelastic layer is at least 0.1mm.

The particle in the present invention refers to a geometric body with no specific shape within the size range. The size mentioned here is generally 0.7 mm to 1.4 mm. The particle not only refers to solid particles, but also liquid particles such as mist and oil droplets. Granules can be divided into natural granules and artificial granules according to their sources. Artificial particle manufacturing methods can be divided into the following categories:

Wet granulation: adding a binder or wetting agent to the drug powder to make a soft material, sieving to make wet granules, drying the wet granules and then sizing. Granules produced by wet method have the advantages of good surface modification, beautiful appearance, strong wear resistance, good compression formability, etc., and are most widely used in the pharmaceutical industry.

Spray granulation: Mix the raw materials, auxiliary materials and binders, stir continuously to make a drug solution or suspension with a solid content of about 50%-60%, and then use a pump to spray it into the hot air in the drying room through a high-pressure sprayer , the method of rapidly evaporating water to directly make spherical dry fine particles.

Dry granulation: After mixing the drug powder (if necessary, adding a diluent, etc.), it is directly pressed into blocks with suitable equipment, and then crushed into particles of the required size. This method relies on the effect of compression force to generate binding force between particles.

Fully mix the particles with viscoelastic polyolefin elastomers. The polyolefin elastomer POE is mainly polymerized with ethylene or propylene, and α-olefins (mainly α-olefins with 4 to 8 carbons, such as 1- Butene, 1-hexene, 1-octene) are copolymers obtained by polymerizing comonomers. Among them, the crystalline region of the carbon-carbon main chain (resin phase) acts as a physical cross-linking point, and the introduction of a certain amount of α-olefin weakens the crystalline region of the carbon-carbon main chain, forming an amorphous region (rubber phase) that exhibits rubber elasticity. . The microstructure of the polymer determines its macroscopic properties. Compared with polymers prepared by traditional polymerization methods, on the one hand, POE has a narrow molecular weight distribution and short branched chain distribution, so it has excellent physical and mechanical properties (high elasticity, high strength, etc.) , high elongation) and good low temperature performance; at the same time, the narrow molecular weight distribution can make the material less prone to deflection during injection molding and extrusion.

On the other hand, because the POE molecular chain is saturated and contains relatively few tertiary carbon atoms, it has excellent heat aging resistance and UV resistance. Wherein according to ASTM D1238, the melt flow index of the adhesive particles at 190° C. and 2.16 kg is less than or equal to 15 g/10 min. ENGAGE ^TM 11527 1154711567 from Dow Chemical (Shanghai) Co., Ltd. was selected. Under certain conditions, a viscoelastic layer is formed and particles are embedded in the viscoelastic layer, and the viscoelastic layer and the particles embedded in the viscoelastic layer are formed into strips under the action of the wrapping material through rolling equipment. The thickness of the viscoelastic layer is at least 0.1mm. The so-called certain conditions refer to, including but not limited to, heat exchange, and heat exchange is generally accomplished in three ways: heat conduction, heat convection, and heat radiation.

The particle bonding process of the present invention adopts the process of encapsulating the particles with an encapsulation film.

The so-called encapsulation film means that the matrix material is prepared by fully mixing particles with viscoelastic polyolefin elastomer ENGAGE ^TM 11527. On the bonding interface between the wrapping material and the matrix material, the polyolefin elastomer ENGAGE ^TM 11527 naturally forms an adhesive film after heating, and the adhesive film forms a ring-shaped encapsulation adhesive film under the limitation of the wrapping material. The interface between the adhesive film and the wrapping material is flat and round, and the particles on the inner surface of the interface layer constitute the viscoelastic layer. The elastic body ENGAGE ^TM 11527 forms a dot-like or grid-like adhesive film (different from the ring-shaped packaging adhesive film formed by the interface layer) and can move in a small three-dimensional way. In other words, the particles inside the substrate are connected on the polyolefin elastomer to form a dot-shaped or grid-shaped adhesive film; the particles in the interface layer are connected to form a ring-shaped encapsulation adhesive film.

The present invention is further described from another angle below:

example 1

Polyolefin elastomer POE is based on ethylene or propylene as the main polymerization unit, with α-olefins (mainly α-olefins with 4 to 8 carbons, such as 1-butene, 1-hexene, 1-octene) as the main polymerization unit. A copolymer obtained by polymerizing comonomers. Among them, the crystalline region of the carbon-carbon main chain (resin phase) acts as a physical cross-linking point, and the introduction of a certain amount of α-olefin weakens the crystalline region of the carbon-carbon main chain, forming an amorphous region (rubber phase) that exhibits rubber elasticity. . The microstructure of the polymer determines its macroscopic properties. Compared with polymers prepared by traditional polymerization methods, on the one hand, POE has a narrow molecular weight distribution and short branched chain distribution, so it has excellent physical and mechanical properties (high elasticity, high strength, etc.) , high elongation) and good low temperature performance; at the same time, the narrow molecular weight distribution can make the material less prone to deflection during injection molding and extrusion.

On the other hand, because the POE molecular chain is saturated and contains relatively few tertiary carbon atoms, it has excellent heat aging resistance and UV resistance. Wherein according to ASTM D1238, the melt flow index of the adhesive particles at 190° C. and 2.16 kg is less than or equal to 15 g/10 min. ENGAGE ^TM 11527 from Dow Chemical (Shanghai) Co., Ltd. was selected.

The matrix material is heated to 150°C to 300°C, preferably the matrix material is heated to 175°C to 250°C, more preferably the matrix material is heated to 195°C to 220°C.

When heated to 150°C to 300°C, the thickness of the viscoelastic layer is about 0.1-0.9mm; when heated to 175°C to 250°C, the thickness of the viscoelastic layer is about 0.3-0.7mm; The thickness of the layer is about 0.4-0.6 mm.

Fully mixing the particles with viscoelastic polyolefin elastomer ENGAGE ^TM 11527 to prepare the matrix material, the matrix material contains the particles and the viscoelastic polyolefin elastomer in a weight ratio of 50:50 to 90:10 . The matrix material passes through the feed funnel 21 relying on natural gravity or closed positive pressure (not shown in the figure) through the feed path 22 and enters the filter rod forming cavity 24. When entering the filter rod forming cavity 24, the wrapping molding paper 8 is also Enter the filter rod forming cavity 24. A heating element 25 is arranged outside the filter rod forming cavity 24 to heat the filter rod forming cavity 24, and the particles are encapsulated in the filter rod forming cavity 24 to form a film; at the exit end of the filter rod forming cavity 24, there is a cutter 11 to package the particles The continuous strip after the glued film is cut to reach a particle-bonded cigarette holder with a specified length and a specified circumference.

The so-called encapsulation film means that the matrix material is prepared by fully mixing particles with viscoelastic polyolefin elastomer ENGAGE ^TM 11527. On the bonding interface between the wrapping material and the matrix material, the polyolefin elastomer ENGAGE ^TM 11527 naturally forms an adhesive film after heating, and the adhesive film forms a ring-shaped encapsulation adhesive film under the limitation of the wrapping material. The interface between the adhesive film and the wrapping material is flat and round, and the particles on the inner surface of the interface layer constitute the viscoelastic layer. The elastic body ENGAGE ^TM 11527 forms a dot-like or grid-like adhesive film (different from the ring-shaped packaging adhesive film formed by the interface layer) and can move in a small three-dimensional manner.

By adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closed pressure drop of the cigarette holder can be controlled within 300-600 mm of water column.

Wherein according to ASTM D1238, the melt flow index of the adhesive particles at 190° C. and 2.16 kg is less than or equal to 5 g/10 min. ENGAGE ^TM 11547 from Dow Chemical (Shanghai) Co., Ltd. was selected. Heating at least a part or all of the host material to 150°C to 300°C, preferably heating at least a part or all of the host material to 175°C to 250°C, more preferably heating at least a part or all of the host material to 195°C to 220°C.

Heating to 150°C to 300°C, the thickness of the viscoelastic layer is 0.1-0.8mm, heating to 175°C to 250°C, the thickness of the viscoelastic layer is 0.3-0.6mm, heating to 195°C to 220°C, The thickness is 0.4-0.5mm.

The matrix material is prepared by thoroughly mixing the particles with the viscoelastic polyolefin elastomer ENGAGE ^TM 11547. The matrix material contains the particles and the viscoelastic polyolefin elastomer at a ratio of 50:50 to 90:10. The matrix material passes through the feed funnel 21 and relies on natural gravity or closed positive pressure (not shown in the figure) to pass through the feed path 22 and enter the filter rod forming cavity 24. When entering the filter rod forming cavity 24, the molding paper 8 used for wrapping is also Enter the filter rod forming cavity 24 together. A heating element 25 is arranged outside the filter rod forming cavity 24 to heat the filter rod forming cavity 24, and the particles are encapsulated in the filter rod forming cavity 24 to form a film, and at the exit end of the filter rod forming cavity 24, there is a cutter 11 to package the particles The continuous strip after the film is cut to achieve a particle-encapsulated film cigarette holder with a specified length and a specified circumference.

By adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closed pressure drop of the cigarette holder can be controlled within 100-300 mm of water column.

The matrix material has a weight ratio of 0.7 mm particles and polyolefin elastomer at 50:50, the packing density of particles is 400-800 mg/ml, and the processing range of closed pressure drop of the cigarette holder is controlled at 150-300 mm water column. Specifically include:

(1) The weight ratio is 50:50, and the packing density of the particles is controlled at 400 mg/ml, so the closed pressure drop of the cigarette holder is 150 mm water column;

(2) The weight ratio is 50:50, and the packing density of the particles is controlled at 800 mg/ml, so the closed pressure drop of the cigarette holder is 300 mm water column;

(3) The weight ratio is 50:50, and the packing density of the particles is controlled at 680 mg/ml, so the closed pressure drop of the mouthpiece is 250 mm water column.

The matrix material has a weight ratio of 1.4 mm particles and polyolefin elastomer at 90:10, the packing density of particles is 100-400 mg/ml, and the processing range of closed pressure drop of the cigarette holder is controlled at 100-200 mm water column. Specifically include:

(1) The weight ratio is 90:10, and the packing density of the particles is controlled at 100 mg/ml, so the closed pressure drop of the cigarette holder is 100 mm water column;

(2) The weight ratio is 90:10, and the packing density of the particles is controlled at 400 mg/ml, so the closed pressure drop of the cigarette holder is 200 mm water column;

(3) The weight ratio is 90:10, and the packing density of the particles is controlled at 300 mg/ml to 160 mm water column.

Example 2

Wherein according to ASTM D1238, the melt flow index of the adhesive particles at 190° C. and 2.16 kg is less than or equal to 1 g/10 min. ENGAGE ^TM 11567 from Dow Chemical (Shanghai) Co., Ltd. was selected. Fully mixing the particles with viscoelastic polyolefin elastomer ENGAGE ^TM 11567 to prepare the matrix material, the matrix material contains the particles and the viscoelastic polyolefin elastomer in a weight ratio of 50:50 to 90:10 . The granular processing raw material 5 moves to the feed belt 1 through the positive pressure applied in the positive pressure silo 4. The feed belt 1 is usually a belt-shaped object containing air holes, so that the negative pressure generated by the negative pressure element 3 can pass through the air. The perforations are applied to the granular processing material 5 to form a continuous strip of particle packing on the feed belt 1 . The feed belt 1 forms a circular particle transmission movement under the action of the transmission roller 2, and under the action of the leveling cutter 6, the continuous strips of particle accumulation formed on the feed belt 1 are leveled and corrected, so that the feed belt 1 forms Particle accumulation is more in line with the needs of smoking. After passing through the leveling cutter 6, the continuous strips of particle accumulation formed on the feed belt 1 continue to move to the left, and through the action of the paper guide roller 7, the forming paper 8 and the continuous strips of particles formed on the feed belt 1 pass through. Finally, the molding paper 8 wraps the continuous strips of particles formed on the feed belt 1, and the blocking device 9 cleans up the particles that have not completely fallen on the feed belt 1 to ensure that the feed belt 1 After the transmission roller 2 rotates, the surface of the feeding belt 1 is clean and free of particles, and the cycle negative pressure suction process is completed. The heating unit 10 heats and shapes the continuous strips of particles on the feed belt 1 wrapped by the molding paper 8, and then under the action of the cutter 11, a particle-encapsulated film cigarette holder with a specified length and a specified circumference is formed.

By adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closing pressure drop of the cigarette holder can be controlled within 30-100 mm of water column.

The matrix material has a weight ratio of 0.7 mm particles and polyolefin elastomer at 50:50, the packing density of particles is 400-800 mg/ml, and the processing range of closed pressure drop of the cigarette holder is controlled at 70-100 mm water column. Specifically include:

(1) The weight ratio is 50:50, and the packing density of the particles is controlled at 400 mg/ml, so the closed pressure drop of the cigarette holder is 70 mm water column;

(2) The weight ratio is 50:50, and the packing density of the particles is controlled at 800 mg/ml, so the closed pressure drop of the mouthpiece is 100 mm water column.

The matrix material has a weight ratio of 1.4mm particles and polyolefin elastomer at 90:10, the packing density of particles is 100-400 mg/ml, and the processing range of closed pressure drop of the cigarette holder is controlled at 30-80 mm water column. Other embodiments:

(1) The weight ratio is 90:10, and the packing density of the particles is controlled at 100 mg/ml, so the closed pressure drop of the cigarette holder is 30 mm water column;

(2) The weight ratio is 90:10, and the packing density of the particles is controlled at 400 mg/ml, so the closed pressure drop of the cigarette holder is 80 mm water column;

(3) The weight ratio is 90:10, and the particle packing density is controlled at 300 mg/ml, so the closed pressure drop of the mouthpiece is 60 mm water column.

As shown in FIG. 3 , the matrix material 33 of the porous substance is composed of particles, and at least one viscoelastic layer 32 is formed outside the substrate, and the particles are embedded in the viscoelastic layer 32 . The particles are geometric bodies with no specific shape, and the size of the particles is between 0.7 mm and 1.4 mm. The thickness of the viscoelastic layer 32 is at least 0.1 mm. The exterior of the viscoelastic layer 32 is wrapped with molding paper 31, the viscoelastic layer interface and the outer surface 34 formed by the wrapping material are formed between the viscoelastic layer 32 and the molding paper 31, and the viscoelastic layer is formed between the viscoelastic layer 32 and the matrix material 33 The inner surface 35 of the interface.

Owing to adopting above-mentioned technical scheme, the beneficial effect that the present invention obtains comprises:

1. For porous substances with viscoelastic properties, a viscoelastic layer interface is formed between the wrapping material and the particles of the mixed polyolefin elastomer. The contact surface between the interface layer and the wrapping material is smooth and round. The particles adhered to the inner surface of the layer and the particles wrapped in the interface layer of the viscoelastic layer can move in three dimensions;

2. Porous substances with viscoelastic properties can break the industry practice that the heating smoke support section must be solved by hollow components, and create a new support structure;

3. Porous substances with viscoelastic properties can have the dual advantages of particle structure cooling and flexible processing;

4. After the particles are completely bonded, when the strips are cut, the particles are in direct contact with the cutter, and the particles are cut; the viscoelastic layer interface wraps

Coated particles can move in small three-dimensional to achieve flexible slitting, that is, the particles usually remain intact, greatly reducing damage to the blade; 5. With good resilience performance, it can be rubbed with other strips at high speed in the subsequent processing process or rolled,

Improve efficiency;

6. When the thickness of the viscoelastic layer reaches 0.1mm, the strip can have resilience; and a viscoelastic layer is formed on the contact surface of the wrapping material, that is, the outer layer of the strip has processing conditions, which is easy to achieve; It solves the problem that when the particle is directly bonded to the particle, the strip must have a slight flow from the outside to the inside of the adhesive and only a slight flow of bonding (ASTMD1238 adhesive particles at 190 ° C and 15 kg Melt flow index Less than or equal to 3.5g/10min) harsh conditions.

Description of drawings

Fig. 1 is a schematic diagram of the positive pressure process equipment for preparing the cigarette holder of the present invention.

Fig. 2 is a schematic diagram of negative pressure suction particle type process equipment for preparing the cigarette holder of the present invention.

Fig. 3 is a cross-sectional and partially enlarged schematic view of an embodiment of a cigarette holder prepared according to the present invention.

Marks in the figure: 1-feed belt; 2-transmission roller; 3-negative pressure element; 4-positive pressure silo; 5-granule processing raw material, 6-leveling cutter; 7-guiding paper roller; 8-forming paper ;9-feeding device; 10-heating unit; 11-cutter; 21-feeding funnel; 22-feeding path, 24-filter rod forming cavity; 25-heating element; 31-forming paper; 32-viscoelastic layer; 33-matrix material; 34-the outer surface formed by the viscoelastic layer interface and the wrapping material; 35-the inner surface of the viscoelastic layer interface.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The term "closed pressure drop" used herein refers to the static pressure difference between the two ends of the sample when the sample is passed by air flow under a certain atmospheric environment and the volume flow rate at the outlet port is 17.5ml/sec. In this paper, the closed pressure drop has been measured according to the recommended method 41 of CORESTA ("Cooperation Center for Scientific Research Relative to Tobacco") released in June 2007.

The packing density of conventional shredded tobacco in cigarettes is roughly 220-240 mg/ml, and the packing density of granules is 100-800 mg/ml.

The negative pressure is 6000-24000Pa, the port diameter is φ5cm, the length of the connecting member is 32cm, the width of the hollow groove is 0.8cm, and the two ends are inner arc grooves with an arc length of 0.9cm. The suction ribbon used for cigarettes with a width of 1cm is used, and it is pressed against the notch of the component through negative pressure to naturally form an arc-shaped suction end. When the microsphere silo is in an open state, the distance between the suction ribbon and the particles on the top of the microsphere silo is 5cm- 8cm, the microsphere particles can be adsorbed to the suction ribbon by negative pressure, and the microsphere particles at the suction filament end can be manually shaped by using a suitable shaping member, and the redundant particles at the edge can be scraped off to form a regular shape. The LEISTER hot air system (3400wmistral6system) is adopted, the air duct channel is 1cm, the inner frame size is 13*13*15cm U-shaped wind field, the size of the two side plates is 13*15cm, and 80 φ2mm small holes are evenly distributed on the plate surface, and the bottom plate size is 13*15cm, the board surface is divided into 3 layers with radii of 3cm, 4cm, and 4.5cm, and 26 small holes of φ2mm are distributed in a circle, and the number of holes is 8, 8, and 10 respectively. Use hot air at 200°C to heat the suction ribbon for 1-2 minutes to achieve static sticking of the adsorption particles.

From the static test, it can be seen that the continuous particle formation can be realized under the joint action of the negative pressure and the heating wind field by using the suction ribbon with dynamic circulation operation.

The above related descriptions and descriptions of the embodiments are intended to facilitate the understanding and application of the present invention by those of ordinary skill in the technical field. It is obvious that those skilled in the art can easily make various modifications to these contents, and apply the general principles described here to other embodiments without creative effort. Therefore, the present invention is not limited to the above relevant descriptions and descriptions of the embodiments. According to the disclosure of the present invention, improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims (18)

1. A porous substance with viscoelastic properties, characterized in that: the matrix material of the porous substance is made of particles, and at least one viscoelastic layer is formed outside the matrix material, and a viscoelastic layer is embedded in the viscoelastic layer. the above particles. 2. The porous substance with viscoelastic properties according to claim 1, characterized in that: there is a wrapping material outside the viscoelastic layer, and the viscoelastic layer interface and the wrapping material are formed between the viscoelastic layer and the wrapping material. The outer surface formed, the inner surface of the viscoelastic layer interface is formed between the viscoelastic layer and the matrix material; the particles adhered to the inner surface of the viscoelastic layer interface layer and the particles wrapped by the viscoelastic layer interface layer can move three-dimensionally . 3 . The porous substance with viscoelastic properties according to claim 1 , wherein the particles are geometric bodies without specific shapes, and the size of the particles is between 0.7 mm and 1.4 mm. 4 . 4. The porous substance with viscoelastic properties according to claim 1, wherein the particles include solid particles and liquid particles. 5 . The porous material with viscoelastic properties according to claim 1 , wherein the thickness of the viscoelastic layer is at least 0.1 mm. 6. The method for preparing a porous substance with viscoelastic properties according to any one of claims 1 to 5, characterized in that it comprises the following steps: (1) Fully mix natural particles or artificial particles with polyolefin elastomer; (2) Under certain conditions, a viscoelastic layer is formed and particles are embedded in the viscoelastic layer; (3) The particles adopt the process of encapsulating the particles with an encapsulation film. 7. The method for preparing a porous substance with viscoelastic properties according to claim 6, characterized in that the weight ratio of the particles and polyolefin elastomer in step (1) is 50:50 to 90:10. 8. The method for preparing a porous substance with viscoelastic properties according to claim 6, characterized in that: the polyolefin elastomer is polymerized with ethylene or propylene as the main polymerization unit and α-olefin as the comonomer obtained copolymer. 9 . The method for preparing a porous substance with viscoelastic properties according to claim 6 , wherein the α-olefin is an α-olefin with 4-8 carbons. 10 . The method for preparing a porous substance with viscoelastic properties according to claim 6 , wherein the certain conditions in step (2) include heat exchange. 11 . 11. The method for preparing a porous substance with viscoelastic properties according to claim 6, characterized in that the process of encapsulating the particles with the encapsulation film in step (3) refers to: combining the particles with viscoelastic properties The polyolefin elastomer is fully mixed to prepare the substrate; on the interface between the wrapping material and the substrate, the polyolefin elastomer naturally forms an adhesive film after heating, and the adhesive film forms a ring-shaped encapsulation glue under the limitation of the wrapping material film; the interface between the adhesive film and the wrapping material is smooth and round, and the particles adhered to the inner surface of the interface layer constitute the viscoelastic layer. . 12. The method for preparing a porous substance with viscoelastic properties according to claim 11, characterized in that: the particles inside the substrate are connected on the polyolefin elastomer to form a point-like or grid-like adhesive film; Particles in the interfacial layer form a ring-shaped encapsulation film that is connected. 13. The method for preparing porous substances with viscoelastic properties according to claim 6, characterized in that: the method for preparing artificial granules in step (1) includes wet granulation, spray granulation and dry granulation. 14. The method for preparing a cigarette holder by using the porous material with viscoelastic properties according to any one of claims 1 to 5, characterized in that it comprises the following steps: passing the matrix material through the feeding funnel relying on natural gravity or closed positive pressure. The material path enters the filter rod forming cavity; when entering the filter rod forming cavity, the molding paper used for wrapping also enters the filter rod forming cavity together; a heating element is arranged outside the filter rod forming cavity to heat the filter rod forming cavity; The sealing film is formed in the filter rod forming cavity, and at the exit end of the filter rod forming cavity; a cutter is set to cut the continuous strip after the particle sealing film, and a particle sealing film cigarette holder with a specified length and a specified circumference is obtained. . 15. The method for preparing a cigarette holder from a porous material having viscoelastic properties according to claim 14, characterized in that: By adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closed pressure drop of the cigarette holder is controlled within 100-600 mm of water column. 16. The method for preparing a cigarette holder from a porous material with viscoelastic properties according to claim 14, characterized in that: the matrix material is heated to 150°C to 300°C, and the thickness of the viscoelastic layer is 0.1-0.9mm; When heated to 175°C to 250°C, the thickness of the viscoelastic layer is 0.3-0.7mm; when heated to 195°C to 220°C, the thickness of the viscoelastic layer is 0.4-0.6mm. 17. The method for preparing a cigarette holder using the porous material with viscoelastic properties according to any one of claims 1 to 5, characterized in that it comprises the following steps: generating the particle processing raw material in a positive pressure silo by applying positive pressure Movement to the feed belt, the feed belt is a belt-shaped object with air holes, which facilitates the negative pressure generated by the negative pressure element to be applied to the raw materials for particle processing through the air holes, forming continuous strips of particle accumulation on the feed belt; The feed belt forms a circular particle transmission movement under the action of the transmission roller, and under the action of the leveling cutter, the continuous strips of particle accumulation formed on the feed belt are leveled and corrected, so that particles are formed on the feed belt. Accumulation is more in line with the needs of cigarettes; after passing through the leveling cutter, a continuous strip of particle accumulation is formed on the feeding belt and continues to move to the left. Through the action of the paper guide roller, the forming paper and the feeding belt The continuous strips of particles are formed to move forward, and finally the wrapping of the continuous strips of particles formed on the feed belt by the forming paper is completed, and the blocking device cleans up the particles that have not completely fallen on the feed belt , to ensure that after the feed belt is rotated by the transmission roller, the surface of the feed belt is clean and free of particles, and the cycle negative pressure suction process is completed; the heating unit wraps the continuous strip of particles on the feed belt after the forming paper The shape is heated and shaped, and then under the action of a cutter, a particle-encapsulated film cigarette holder with a specified length and a specified circumference is obtained. 18. The method for preparing a cigarette holder from a porous material having viscoelastic properties according to claim 17, characterized in that: By adjusting the filling density of the particles and the ratio of the particles to the polyolefin elastomer, the processing range of the closing pressure drop of the cigarette holder is controlled within 30-100 mm of water column.

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