A method for mixing and deaerating a microbead suspension and a microbead suspension

Abstract

The application discloses a kind of microbead suspension's mixing defoaming method and microbead suspension, method includes the following steps: providing m parts of viscous solution, n parts of microbead;One part of viscous solution is added to point glue pipe, each part of microbead and the rest each part of viscous solution is alternately added to point glue pipe;After pre-stirring to viscous solution and microbead in point glue pipe, it is carried out to rotate vacuum defoaming stirring, and microbead suspension is obtained.Using the way of alternate loading and pre-stirring can make the particle group of microbead quickly disintegrate, accelerate the surface of microbead solid particle to be wetted by liquid, concentrate to release heat, and microbead particle is more easily immersed in viscous solution.In the process of rotation vacuum defoaming stirring, preset vacuum degree is maintained, not only conducive to microbead uniform dispersion, but also conducive to fully defoaming.In the obtained microbead suspension, microbead is uniformly dispersed in viscous solution, and the bubble in microbead suspension is micron level and below diameter bubble.

Description

Technical Field

[0001] This invention relates to the field of mixing and degassing technology, and more particularly to a mixing and degassing method for a microbead suspension and the microbead suspension itself. Background Technology

[0002] Glass microspheres, as a novel material, can be mixed with coatings, adhesives, etc., to create composite materials. These materials can improve refractive index, increase surface strength, enhance corrosion resistance, and reduce product weight. They can be used as raw materials for electrical porcelain and other electrical insulation materials, and for maintaining a fixed distance at bonding interfaces. However, due to the significant density difference between viscous solutions like adhesives or coatings and solid particles like glass microspheres, and the fragility of glass microspheres, uneven mixing or stratification of the two substances can occur during actual mixing. Low-viscosity viscous solutions (such as low-viscosity adhesives or coatings) facilitate uniform mixing, but after a period of time, they tend to separate into layers (precipitate) with the solid particles. High-viscosity solutions, on the other hand, may leave residual air bubbles, making it difficult to meet mixing requirements.

[0003] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, a mixing and degassing method for microsphere suspension, and a microsphere suspension device, in view of the above-mentioned defects of the prior art, which aims to solve the problem of low uniformity of mixing viscous solution with solid particles such as microspheres and easy formation of bubbles in the prior art.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows:

[0006] A method for mixing and degassing a microbead suspension, comprising the steps of:

[0007] Provide m parts of viscous solution and n parts of microbeads; where m is a positive integer greater than 1, n is a positive integer, and m = n or m = n+1;

[0008] Add one part of viscous solution to the dispensing tube, and alternately add each part of microbeads and the remaining parts of viscous solution to the dispensing tube;

[0009] After pre-stirring the viscous solution and microspheres in the dispensing tube, vacuum degassing and stirring with rotation and revolution are performed to obtain a microsphere suspension; wherein, the microspheres in the microsphere suspension are uniformly dispersed, and the bubbles are bubbles with a diameter of micrometers or less.

[0010] The method for mixing and degassing the microbead suspension, wherein the dispensing tube comprises:

[0011] A dispensing tube includes a dispensing end, a connector, and a container end connected in sequence. The inner diameter of the dispensing end is smaller than the inner diameter of the container end, and the height of the connector is smaller than the inner radius of the container end.

[0012] The plug is detachably and sealingly connected to the dispensing end;

[0013] The cap is detachably connected to the end of the container, and there is a gap between the cap and the injection port for gas to pass through;

[0014] Before adding a viscous solution to the dispensing tube, the plug is connected to the dispensing end, and the cap is not connected to the container end;

[0015] During the rotation and revolution vacuum degassing and stirring process, the cover is connected to the container end.

[0016] The method for mixing and degassing the microsphere suspension, wherein the pre-stirring is performed using a stirring rod, the diameter of which is the diameter of the dispensing outlet of the dispensing tube; the rotational and revolving vacuum degassing stirring specifically includes:

[0017] Place the dispensing tube containing the viscous solution and the microbeads into the material cup of the self-rotating and revolution-rotating vacuum stirring degassing machine, and start and adjust the vacuum degree to meet the preset requirements;

[0018] The viscous solution and microbeads in the dispensing tube are stirred by the rotation and revolution of the self-rotation unit; wherein the direction of rotation is opposite to the direction of revolution, and the speed of revolution increases and then decreases in stages.

[0019] The method for mixing and degassing the microbead suspension, wherein the parameters of the revolution are as follows:

[0020] The first stage lasts 60 to 120 seconds, with a revolution speed of 800 to 1000 revolutions per minute;

[0021] The second stage lasts 60 to 120 seconds, with a revolution speed of 1100 to 1200 revolutions per minute;

[0022] The third stage lasts 60 to 120 seconds, with a revolution speed of 1250 to 1300 revolutions per minute;

[0023] The fourth stage lasts 60 to 120 seconds, with a revolution speed of 800 to 900 revolutions per minute.

[0024] The method for mixing and degassing the microbead suspension, wherein the microbeads are glass microbeads and the viscous solution is UV adhesive.

[0025] The method for mixing and degassing the microsphere suspension, wherein the mass ratio of the glass microspheres to the UV adhesive is 1:5 to 15.

[0026] In the aforementioned method for mixing and degassing the microsphere suspension, the mass of the subsequently added viscous solution is less than or equal to the mass of the previously added viscous solution.

[0027] In the aforementioned method for mixing and degassing the microbead suspension, the mass of the later-added portion of microbeads is less than or equal to the mass of the earlier-added portion of microbeads.

[0028] The method for mixing and degassing the microbead suspension, wherein m is 2 and n is 1.

[0029] A microbead suspension, wherein the microbeads are obtained by the steps described in any of the preceding methods.

[0030] Beneficial effects: The alternating loading and pre-stirring method allows for rapid disintegration of the microsphere particle clusters, accelerating the wetting of the microsphere solid particles by the liquid, concentrating heat release, and making it easier for the microsphere particles to be immersed in the viscous solution. Maintaining a preset vacuum level during the rotation-revolution vacuum degassing and stirring process not only promotes uniform dispersion of the microspheres but also facilitates thorough degassing. In the resulting microsphere suspension, the microspheres are uniformly dispersed in the viscous solution, and the bubbles in the microsphere suspension are at or below the micrometer scale. Attached Figure Description

[0031] Figure 1 This is a flowchart of the mixing and degassing method for the microsphere suspension in this invention.

[0032] Figure 2 This is a schematic diagram of the dispensing tube in this invention.

[0033] Figure 3 This is a cross-sectional view of the dispensing tube in this invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Dispensing tube; 11. Dispensing end; 12. Connector; 13. Container end; 20. Plug; 30. Cap; 40. Piston; D. Inner diameter of container end; d. Inner diameter of dispensing end; h. Height of connector. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0037] Please also refer to Figures 1-3 This invention provides some embodiments of a method for mixing and degassing a microbead suspension.

[0038] like Figures 1-2 As shown, the mixing and degassing method for the microbead suspension of the present invention employs a dispensing tube and a self-rotating and revolving vacuum stirring degassing machine.

[0039] Specifically, such as Figure 2 and Figure 3 As shown, the dispensing tube includes:

[0040] The dispensing tube 10 includes a dispensing end 11, a connector 12, and a container end 13 connected in sequence. The inner diameter d of the dispensing end is smaller than the inner diameter D of the container end, and the height h of the connector is smaller than the inner radius of the container end 13.

[0041] The plug 20 is detachably and sealingly connected to the dispensing end 11;

[0042] The cover 30 is detachably connected to the container end 13, and there is a gap between the cover 30 and the injection port for gas to pass through.

[0043] Specifically, the dispensing tube 10 is used to store viscous solutions and microbeads. Typically, the inner diameter d (specifically the diameter of the inner ring of the tube) of the dispensing end is small, which facilitates accurate control of the amount of extruded suspension. The inner diameter D of the container end is large, which facilitates the storage of more suspension and a larger rotation radius. The height h of the connector is smaller than the inner radius of the container end 13, ensuring that the capacity of the connector 12 is small. Because the space inside the dispensing end 11 and the connector 12 is small and the rotation radius is also small during the mixing and degassing process, the viscous solution has greater resistance to movement and is difficult to mix evenly. During use, the suspension in the dispensing end 11 and the connector 12 is pre-extruded and removed, and the suspension extruded from the container end 13 is used.

[0044] The dispensing tube also includes a piston 40, detachably connected to the cap 30. During the stirring and degassing process, the piston 40 is not needed; it can be removed to ensure the dispensing tube is not completely sealed. A gap exists between the cap 30 and the container end 13, allowing gas to pass through. When a vacuum is created by the rotating and revolving vacuum stirring and degassing machine, the dispensing tube will also be under vacuum. Once bubbles appear in the viscous solution, because the gas pressure inside the bubbles is higher than the pressure inside the dispensing tube, the bubbles will move to the surface of the viscous solution and burst, achieving degassing. In use, the piston 40 can be installed and sealed at the tail end of the container end 13. The dispensing machine uses compressed gas to drive the piston, achieving automatic dispensing.

[0045] The self-rotating and revolution-revolving vacuum stirring and degassing machine includes:

[0046] Vacuum cavity;

[0047] The material cup holder is rotatably positioned within the vacuum chamber;

[0048] A fixed gear is fixedly installed in the vacuum chamber;

[0049] An even number of material cups are centrally symmetrically arranged and rotatably mounted on a material cup holder. An external gear is provided outside the material cup, and the external gear meshes with a fixed gear.

[0050] The drive unit, connected to the cup holder, is used to drive the cup to revolve and rotate.

[0051] A vacuum pump is connected to a vacuum chamber and is used to extract air from the vacuum chamber to a preset vacuum level.

[0052] Specifically, an even number of material cups are arranged symmetrically around a central axis of revolution, with the cups tilted upwards towards the central axis (the tilt angle can be 40° to 60°). The vacuum chamber is equipped with a safety door, and the material cups allow for the insertion of a dispensing tube. When the drive unit rotates the material cup holder, the holder causes the cups to revolve. Because the external gear meshes with the fixed gear, and the fixed gear remains constant, the external gear continuously changes its meshing position with the fixed gear, causing the material cups to rotate. The direction of rotation is opposite to the direction of revolution. If the revolution direction is clockwise, the rotation direction is counterclockwise; if the revolution direction is counterclockwise, the rotation direction is clockwise. The ratio of the revolution speed to the rotation speed is essentially constant and is related to the tooth ratio between the external gear and the fixed gear. After opening the safety door, insert the dispensing tube into the material cup and secure it inside (the central axis of the material cup and the central axis of the dispensing tube should be close to or coincident with each other). Close the safety door, start the vacuum pump, and adjust the air pressure in the vacuum chamber to the preset vacuum level. Then, start the drive device to drive the material cup to rotate and revolve. The material cup rotates around its central axis. After mixing and degassing are complete, you can first turn off the drive device, then turn off the vacuum pump, open the safety door, and remove the dispensing tube.

[0053] like Figure 1 As shown, the mixing and degassing method for microbead suspension according to an embodiment of the present invention includes the following steps:

[0054] Step S100: Provide m parts of viscous solution and n parts of microbeads; where m is a positive integer greater than 1, n is a positive integer, and m = n or m = n+1.

[0055] Step S200: Add one part of viscous solution to the dispensing tube, and alternately add each part of microbeads and the remaining parts of viscous solution to the dispensing tube.

[0056] Step S300: After pre-stirring the viscous solution and microspheres in the dispensing tube, perform vacuum degassing stirring with rotation and revolution to obtain a microsphere suspension; wherein, the microspheres in the microsphere suspension are uniformly dispersed, and the bubbles are bubbles with a diameter of micrometers or less.

[0057] Specifically, a viscous solution refers to a solution with a viscosity greater than a preset viscosity. The viscous solution can be an adhesive or coating, such as a UV adhesive, i.e., an ultraviolet-curing adhesive. Microspheres refer to structures with a diameter on the order of micrometers. The shape of microspheres can be spherical or an irregular shape close to a sphere. Microspheres can be glass microspheres. The diameter of the microspheres is within a preset diameter range, for example, 3.0 ± 0.5 μm. The mass ratio of the glass microspheres to the UV adhesive is 1:5 to 15, where the mass of the glass microspheres refers to the sum of n parts of glass microspheres, and the mass of the UV adhesive refers to the sum of m parts of UV adhesive.

[0058] Divide the viscous solution into m portions and the microspheres into n portions. If m = 2, then n = 1 or 2; if m = 3, then n = 2 or 3; if m = 4, then n = 3 or 4. The number of portions of viscous solution is the same as the number of portions of microspheres, or the number of portions of viscous solution is one more than the number of portions of microspheres. When loading the viscous solution and microspheres, first load one portion of viscous solution into the dispensing tube, then load one portion of microspheres, and then continue loading one portion of viscous solution, alternating between loading microspheres and viscous solution until all microspheres and all viscous solution have been loaded. After pre-stirring the viscous solution and microspheres in the dispensing tube, perform a rotational-revolutionary vacuum degassing and stirring to obtain a microsphere suspension. Since the masses of each portion of viscous solution can be the same or different, and the masses of each portion of microspheres can also be the same or different, during loading, load the portion of viscous solution with the larger mass first, and then load the portion with the smaller mass, that is, the mass of the later added portion of viscous solution is less than or equal to the mass of the first added portion of viscous solution. The larger portion of microbeads is loaded first, followed by the smaller portion; that is, the mass of the later-added portion is less than or equal to the mass of the first-added portion. When m = n, the proportion of each viscous solution portion is consistent with the proportion of each microbead portion. For example, when m = n = 3, the mass proportions of each viscous solution portion to the total viscous solution are 1 / 2, 1 / 3, and 1 / 6, respectively, and the mass proportions of each microbead portion to the total microbeads are also 1 / 2, 1 / 3, and 1 / 6, respectively. When m = n + 1, the proportions of each viscous solution portion are close to the proportions of each microbead portion. For example, when m = 3 and n = 2, the mass proportions of each viscous solution portion to the total viscous solution are 1 / 2, 1 / 3, and 1 / 6, respectively, and the mass proportions of each microbead portion to the total microbeads are 3 / 5 and 2 / 5, respectively. That is, 3 / 5 is close to 1 / 2, and 2 / 5 is close to 1 / 3.

[0059] Because the containers are tilted, all containers revolve at the same angular velocity, with the linear velocity at the bottom of the container being greater than that at the top. Due to the density of the microspheres being greater than that of the viscous solution, and under the influence of centrifugal force, the microspheres tend to diffuse towards the bottom of the container, achieving sufficient linear velocity and thus becoming fully dispersed. Layered loading with different mass gradients (loading larger masses first, then smaller masses later) is beneficial for the complete dispersion of the microspheres.

[0060] The entire mixing and degassing process is divided into four stages: 1. Blending, 2. Wetting, 3. Disintegration of particle groups (agglomerates and clumps), and 4. Dispersion and degassing. When microspheres are added to the dispensing tube, they are located on the surface of the viscous solution, achieving physical blending between the viscous solution and the microspheres. Because there is viscous solution both above and below the microspheres, but the microspheres and the viscous solution are not in full contact, an air layer exists. The dispersion mechanism of microspheres in the viscous solution includes wetting and the interaction between microsphere particles within the viscous solution. The process of microspheres being wetted by the viscous solution is actually a process of competition between liquid and gas for the surface of the microspheres, i.e., the disappearance of the solid / gas interface and the formation of the solid / liquid interface. This depends crucially on the polarity difference between the microspheres and the viscous solution; this indicator is called the wettability of the particle surface. Wetting performance is usually measured by the wetting contact angle. Whether they can be wetted by the liquid depends on the particle density, particle size, and heat of wetting. If the density, particle size, and heat of wetting are sufficiently high, the microsphere particles are easily wetted into the viscous solution. Fluid dynamics conditions also play an important role in the wetting of microspheres. During different stages of rotation and revolution in vacuum degassing and stirring, different rotation speeds are used for revolution and rotation to increase the intensity of liquid turbulence and suppress temperature rise (material changes caused by temperature rise). Under the action of centrifugal force and tangential force, the viscous solution forms a funnel-shaped vortex, and the viscous solution and microspheres tumble at high speed.

[0061] Alternating loading and pre-stirring can rapidly disintegrate the microsphere clusters, accelerating the wetting of the microsphere surface by the liquid and releasing concentrated heat (this heat is called wetting heat), making it easier for the microspheres to be immersed in the viscous solution. Maintaining a preset vacuum level during the rotation-revolution vacuum degassing and stirring process not only promotes uniform dispersion of the microspheres but also facilitates thorough degassing. In the resulting microsphere suspension, the microspheres are uniformly dispersed in the viscous solution, and the bubbles in the suspension are micrometer-sized or smaller, specifically micrometer-sized (1.0 μm to 10 μm, including 1.0 μm, excluding 10 μm) or submicrometer-sized (100 nm to 1.0 μm, including 100 nm, excluding 1.0 μm) bubbles. Nanometer-sized bubbles can be disregarded.

[0062] Step S200 specifically includes:

[0063] Step S210: Connect the plug to the dispensing end, and the cover is not connected to the container end.

[0064] Step S220: Add one part of viscous solution to the dispensing tube, and alternately add each part of microbeads and the remaining parts of viscous solution to the dispensing tube.

[0065] Specifically, when loading viscous solutions and microbeads, by connecting the plug to the dispensing end and not connecting the cap to the container end, the viscous solution can be injected into the container end without leaking out from the dispensing end.

[0066] Step S300 specifically includes:

[0067] Step S310: After pre-stirring the viscous solution and microbeads in the dispensing tube using a stirring rod, connect the cap to the container end; wherein, the diameter of the stirring rod is the same as the diameter of the dispensing outlet of the dispensing tube.

[0068] Step S320: Place the dispensing tube containing the viscous solution and the microbeads into the material cup of the self-rotating and revolution-rotating vacuum stirring degassing machine, and start and adjust the vacuum degree to meet the preset requirements.

[0069] Step S330: Start the rotation and revolution to stir the viscous solution and microbeads in the dispensing tube; wherein the direction of rotation is opposite to the direction of revolution, and the speed of revolution increases and then decreases in stages.

[0070] Specifically, the viscous solution and microspheres in the dispensing tube are first pre-stirred, specifically by using a stirring rod that moves in a circular, unidirectional motion. The diameter of the stirring rod is equal to the diameter of the dispensing nozzle at the dispensing end of the tube. This facilitates the secondary degassing of any remaining adhesive in the dispensing tube containing the piston, allowing the piston to be pushed out from the dispensing nozzle in the opposite direction. After step S200, the microspheres and viscous solution form a sandwich structure, with one layer of viscous solution on one side and another layer of viscous solution on the other. After pre-stirring, the microspheres in each layer are broken down into smaller particles, and then the cap is replaced. The pre-stirred dispensing tube is placed in a material cup, and a vacuum pump is started to extract air from the vacuum chamber, bringing the pressure inside the chamber to a preset vacuum level. Then, the drive device is activated to drive the material cup to rotate and revolve, causing the viscous solution and microspheres in the dispensing tube to rotate, forming a funnel-shaped vortex. As the speed of the material cup's revolution increases, the speed of its rotation also increases. By gradually increasing the orbital speed to reach the target rotational speed and then reducing it, it is beneficial to avoid collisions between microbeads and to ensure thorough dispersion and degassing.

[0071] The parameters for revolution are as follows:

[0072] The first stage lasts 60 to 120 seconds, with a revolution speed of 800 to 1000 revolutions per minute;

[0073] The second stage lasts 60 to 120 seconds, with a revolution speed of 1100 to 1200 revolutions per minute;

[0074] The third stage lasts 60 to 120 seconds, with a revolution speed of 1250 to 1300 revolutions per minute;

[0075] The fourth stage lasts 60 to 120 seconds, with a revolution speed of 800 to 900 revolutions per minute.

[0076] Specifically, the revolution speed gradually increases from the first to the third stage; in the fourth stage, the revolution speed decreases to be close to that of the first stage.

[0077] The method for mixing and degassing microsphere suspensions described in this application can be used in industries such as electronics, chemicals, food, and ceramics. This solution is valuable for any production process that requires solid particles to be uniformly distributed in the liquid phase, or for composite materials to have a high degree of dispersion and stability of different components. Specific Implementation Example 1

[0079] 1. Tighten the plug onto the dispensing tube;

[0080] 2. Mix glass microspheres and UV adhesive at a mass ratio of 1:10; prepare a 10CC dispensing tube.

[0081] 3. Mix glass microspheres and UV glue at a ratio of 1:10. If you are preparing 5cc of glue, first inject 2.5cc of UV glue into a 10cc dispensing tube, then pour 0.5g of glass microspheres onto the surface of the glue, and then inject the remaining 2.5cc of UV glue into the dispensing tube.

[0082] 4. Use a 1.5mm diameter stainless steel stirring rod to pre-stir the prepared UV glue and glass microbeads in the dispensing tube. When stirring, you can stir in one direction, either clockwise or counterclockwise. The glass microbeads will be dispersed in the glue and will not clump together or form flocs.

[0083] 5. Cover the dispensing tube containing the prepared UV glue and glass microspheres with the lid, but do not cover the piston to avoid affecting the gas release in the glue. Then put the dispensing tube into the material cup and place it in the material cup on one side of the equipment. Place the same weight of the prepared weight on the other side. If you are stirring two dispensing tubes at the same time, the weight of the two dispensing tubes can be the same. Close the safety door and start the machine to enter the working mode.

[0084] 6. Set up a rotary vacuum degassing mixer, for example, set the parameters as follows for the above proportions:

[0085] First stage operation settings: Clockwise direction, start vacuum pump, running time 90 seconds, speed 1000 rpm;

[0086] Second stage operation settings: Clockwise direction, turn on the vacuum pump, running time 90 seconds, speed 1200 rpm;

[0087] Third stage operation settings: Clockwise direction, start vacuum pump, running time 90 seconds, speed 1300 rpm;

[0088] Fourth stage operation settings: Turn clockwise to start the vacuum pump, run for 60 seconds, speed 900 rpm.

[0089] Start the working mode to mix and degas the adhesive.

[0090] 6. After the glass microsphere suspension is prepared by mixing and degassing, the outlet of the mixing tube is very narrow and has a very small radius of revolution and rotation. This part of the glue may contain little or no glass microspheres. Therefore, the glue at the outlet of the mixing tube is not used.

[0091] Through the above operating procedure, the glass microsphere solid particles are uniformly suspended in the liquid phase of UV adhesive. The glass microspheres are not damaged during the mixing process. The diameter of the air bubbles in the UV adhesive is measured by a high-precision imaging instrument or a high-magnification microscope, and only a small number of micron-sized air bubbles with a diameter of less than 5μm are found.

[0092] Based on the mixing and degassing method for microbead suspensions according to any of the above embodiments, this application also provides an embodiment of a microbead suspension:

[0093] The microbead suspension of this application is prepared by the mixing and degassing method of the microbead suspension in any of the above embodiments.

[0094] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A method of mixing and deaerating a suspension of microbeads, characterized in that, The method comprises the steps of: providing m parts of a viscous solution and n parts of microbeads; wherein m is a positive integer greater than 1, n is a positive integer, m = n or m = n + 1; the microbeads are glass microbeads, and the viscous solution is UV glue; the mass ratio of the glass microbeads to the UV glue is 1:5-15; adding one part of the viscous solution to a dispensing tube, and alternately adding each part of the microbeads and each remaining part of the viscous solution to the dispensing tube; after pre-stirring the viscous solution and the microbeads in the dispensing tube, performing self-rotation and revolution vacuum degassing stirring to obtain a microbead suspension; wherein the microbeads are uniformly dispersed in the microbead suspension, and the bubbles are micron-level or sub-micron-level bubbles; the dispensing tube comprises: a piston; a dispensing barrel comprising a dispensing end, a connecting piece and a container end connected in sequence, the inner diameter of the dispensing end being smaller than the inner diameter of the container end, and the height of the connecting piece being smaller than the inner radius of the container end; a plug detachably and sealingly connected with the dispensing end; a cover body detachably connected with the container end; before adding one part of the viscous solution to the dispensing tube, the plug is connected with the dispensing end, and the cover body is not connected with the container end; when performing the self-rotation and revolution vacuum degassing stirring, the piston is not connected with the cover body, the cover body is connected with the container end, and a gap exists between the cover body and the container end for gas to pass through; the pre-stirring is performed by using a stirring rod, and the diameter of the stirring rod is equal to the diameter of a glue outlet of the dispensing end of the dispensing tube.

2. The method of claim 1, wherein the self-rotation and revolution vacuum degassing stirring specifically comprises: placing the dispensing tube containing the viscous solution and the microbeads in a material cup of a self-rotation and revolution vacuum stirring degassing machine, and starting to adjust the vacuum degree to meet a preset requirement; starting to stir the viscous solution and the microbeads in the dispensing tube by self-rotation and revolution; wherein the direction of the self-rotation is opposite to the direction of the revolution, and the rotation speed of the revolution is increased in stages and then decreased.

3. The method of claim 2, wherein the microbead suspension is mixed and defoamed. the parameters of the revolution are as follows: in a first stage, the time is 60-120 seconds, and the rotation speed of the revolution is 800-1000 revolutions per minute; in a second stage, the time is 60-120 seconds, and the rotation speed of the revolution is 1100-1200 revolutions per minute; in a third stage, the time is 60-120 seconds, and the rotation speed of the revolution is 1250-1300 revolutions per minute; in a fourth stage, the time is 60-120 seconds, and the rotation speed of the revolution is 800-900 revolutions per minute.

4. The method for mixing and debubbling of a suspension of microbeads according to any one of claims 1 to 3, characterized in that, the mass of the last added part of the viscous solution is less than or equal to the mass of the first added part of the viscous solution.

5. The method of claim 4, wherein the microbead suspension is mixed and defoamed. the mass of the last added part of the microbeads is less than or equal to the mass of the first added part of the microbeads.

6. The method of claim 5, wherein the microbead suspension is mixed and defoamed. m is 2, and n is 1.

7. A suspension of microbeads, characterized in that, the steps are obtained by using the method according to any one of claims 1-6. the method according to any one of claims 1-6.

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