High-flexibility TPEE material and preparation device thereof

Abstract

The invention discloses a high-flexibility TPEE material and a preparation device thereof. The high-flexibility TPEE material comprises a TPEE base material and a toughening agent, wherein the TPEE base material accounts for 80-90% of the total weight, the hardness of the TPEE base material is 40D, and the toughening agent accounts for 10-20% of the total weight. The preparation device comprises a material mixing barrel, a multi-shaft mixing assembly, a stirring shaft and a granulator, the multi-shaft mixing assembly is composed of a fixed seat, a swing box and a transmission shaft, the transmission shaft is connected with a second driving motor through transmission teeth, the swing box is made to deflect in a reciprocating mode on the surface of the fixed seat, and then the stirring shaft is driven to achieve synchronous control over rotation and reciprocating swing. The stirring shaft is provided with a plurality of paddle plate rods and helical ribbons, so that disturbance and shearing force in the mixing process are enhanced, and the toughening agent and the lubricating agent are ensured to be uniformly dispersed in the TPEE base material. The high-flexibility TPEE material has excellent flexibility and impact toughness, and is suitable for a plurality of high-requirement application fields such as automobile parts, electronic equipment shells, medical apparatuses and instruments and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of TPEE material preparation, in particular to a high-flexibility TPEE material and a preparation device thereof. BACKGROUND

[0002] Thermoplastic polyether ether ketone (TPEE) material is widely used in automotive parts, electronic device housings, medical devices and other fields due to its excellent mechanical properties, heat resistance and chemical stability. However, traditional TPEE materials have obvious shortcomings in flexibility, which limits their further development in some high-demand applications. In the prior art, TPEE materials are usually characterized by high hardness, which can provide good rigidity and strength, but perform poorly in applications requiring high flexibility and impact toughness, leading to brittle fracture of the material under dynamic load or severe impact, affecting the service life and reliability of the product.

[0003] To address the problem of insufficient flexibility of existing TPEE materials, traditional modification methods mainly rely on the addition of a single toughening agent. This method can improve the flexibility of the material to some extent, but it is often difficult to significantly improve the flexibility and impact toughness of the TPEE while maintaining its basic properties. In addition, traditional mixing processes mostly use single-axis stirring or simple double-screw extrusion, resulting in uneven dispersion of the toughening agent and lubricant in the TPEE base material, affecting the overall performance consistency of the material. The high-viscosity TPEE base material has low mixing efficiency under single-axis stirring, and the toughening agent and lubricant are difficult to fully disperse, resulting in the presence of aggregates or uneven regions within the material, further reducing the flexibility and mechanical properties of the material.

[0004] In addition, traditional mixing equipment often cannot accurately control parameters such as stirring speed, swing amplitude and frequency when processing high-viscosity materials, and the mixing process lacks flexibility and detailed adjustment, making it difficult to meet high-quality requirements under different formulations and production demands. Due to the single stirring method, the equipment is prone to uneven load during long-term operation, increasing mechanical vibration and wear, shortening the service life of the equipment and increasing maintenance costs. At the same time, traditional stirring processes are prone to generating bubbles and cavities during mixing, affecting the density and stability of the material, and thus reducing the reliability and service life of the product.

[0005] In summary, existing TPEE materials have many shortcomings in flexibility, mixing uniformity, production efficiency and equipment stability, and it is necessary to optimize the material formulation and innovate the mixing process to overcome these technical bottlenecks to meet the needs of high-flexibility TPEE materials in a wider range of applications. SUMMARY

[0006] The present application aims to solve the problem of insufficient flexibility of TPEE (thermoplastic polyether ether ketone) material in the prior art. Although traditional TPEE materials have excellent mechanical strength, heat resistance and chemical stability, they perform poorly in flexibility and impact toughness, limiting their widespread application in certain high-demand application fields. The prior art usually improves the flexibility of TPEE by adding a single toughening agent, but this method is difficult to significantly improve the flexibility and impact toughness of TPEE while maintaining its basic properties. In addition, traditional mixing processes mostly use single-axis stirring or simple double-screw extrusion, resulting in uneven dispersion of the toughening agent and lubricant in the TPEE base material, affecting the overall performance consistency of the material.

[0007] To overcome the above-mentioned defects, the present application provides a high-flexibility TPEE material and a preparation device thereof, which effectively improves the flexibility and impact toughness of TPEE material by optimizing the material formula and innovative multi-axis stirring mixing device, while ensuring uniform dispersion of each component, improving production efficiency and product quality.

[0008] To achieve the above-mentioned purposes, the present application adopts the following technical solutions: A high-flexibility TPEE material, comprising the following components: Base material: TPEE with a hardness of 40D, accounting for 80%-90% of the total weight; Toughening agent: selected from polybutadiene (BR), polyvinyl alcohol (PEO), polyacrylonitrile (PAN) and their blends, accounting for 10%-20% of the total weight; Lubricant: selected from paraffin, polyethylene wax, fatty acid esters and their blends, accounting for 1%-5% of the total weight.

[0009] After weighing the above components according to the proportion, add them to the mixing and stirring device for thorough mixing, melt and extrude the mixture through a double-screw extruder, then cool and granulate to obtain the high-flexibility TPEE material.

[0010] A preparation device for a high-flexibility TPEE material, comprising: A mixing cylinder, a multi-axis mixing assembly, a stirring shaft and a granulator fixed to one end of the mixing cylinder; The top surface of the mixing cylinder is rotatably installed with a cover plate, and the surface is movably installed with a driving rod for driving the cover plate to open and close; The multi-axis mixing assembly is composed of a fixed seat, a swing box and a transmission shaft, and the fixed seat is fixed to the bottom of the cover plate. When the cover plate is closed, the stirring shaft enters the inside of the mixing cylinder; A plurality of toothed sleeve rings are installed inside the swing box, and each toothed sleeve ring is connected to a worm gear drive through a transmission belt, and the worm gear drive is driven by a first driving motor to control the rotational movement of the stirring shaft; The transmission shaft is in transmission connection with the output end of the second driving motor fixed at one end of the fixed seat through a transmission gear, so that the swing box performs reciprocating deflection on the surface of the fixed seat, and then the reciprocating swing of the stirring shaft is realized. The stirring shaft is provided with a plurality of paddle rods and helical belts, the paddle rods are used for increasing disturbance and shear force in the mixing process, and the helical belts help to promote the flow of materials. A linear driver is fixedly installed on one side of the mixing cylinder, a material pushing plate is slidably installed on the inner side of the linear driver, and the material pushing plate is driven by a gear shaft to slide linearly on the inner side of the mixing cylinder, thereby assisting the promotion and mixing of the materials.

[0011] In a preferred embodiment, the present application can be further configured as: The toughening agent is specifically selected from polybutadiene (BR), polyvinyl alcohol (PEO), polyacrylonitrile (PAN) and blends thereof, and the lubricant is specifically selected from paraffin, polyethylene wax, fatty acid esters and blends thereof to meet the material formula of different performance requirements.

[0012] The temperature of the double-screw extrusion granulation is controlled between 200-240°C, which ensures that the materials are fully mixed in a molten state and avoids thermal degradation, further improving the stability and quality of the materials.

[0013] The paddle rod and helical belt design on the surface of the stirring shaft enhances the disturbance and shear force during the mixing process, and improves the dispersion effect of the toughening agent and the lubricant.

[0014] The present application has the following beneficial effects: 1. In the present application, by optimizing the composition and preparation process of TPEE (thermoplastic polyether ether ketone) material, high flexibility characteristics are realized, the flexibility and impact toughness of the material are effectively improved, and by selecting different types of toughening agents, the flexibility of the material can be significantly improved while maintaining the basic properties of TPEE, meeting the needs of different application scenarios.

[0015] 2. In the present application, by controlling the rotation and swing respectively, the reciprocating swing is realized during the rotation, and this multi-dimensional mixing method can more comprehensively act on the materials and apply shear force in different directions to ensure more uniform dispersion of the toughening agent and the lubricant in the TPEE base material.

[0016] 3. In the present application, high flexibility TPEE material generally has high viscosity, and single-axis stirring cannot effectively mix. Multi-axis stirring can more effectively handle high viscosity materials by multi-directional shear and disturbance, ensuring the thorough mixing of each component, and through multi-axis stirring, the stirring speed, swing amplitude and frequency parameters can be more accurately controlled to finely adjust the mixing process, ensuring the performance consistency and high quality of each batch of materials.

[0017] The application realizes uniform dispersion of toughening agent and lubricant by optimizing the formula proportion of TPEE material and adopting innovative multi-axis stirring mixing device, and significantly improves the flexibility and impact toughness of the material. The high flexibility TPEE material meets the needs of various high requirement application scenarios on the basis of maintaining the excellent performance of TPEE base material. At the same time, the multi-axis stirring design of the preparation device improves the mixing efficiency and production stability, ensures the consistency of product quality and long-term stable operation of the equipment, and has significant technical advantages and broad application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the application. Figure 2 It is a schematic diagram of the internal structure of a mixing cylinder of an embodiment of the application. Figure 3 It is a schematic diagram of the structure of a multi-axis mixing assembly of an embodiment of the application. Figure 4 It is a schematic diagram of the internal structure of a swing box of an embodiment of the application. Figure 5 It is a schematic diagram of the transmission structure of a gear sleeve ring and a first driving motor of an embodiment of the application. Figure 6 It is a schematic diagram of the transmission structure of a swing box and a second driving motor of an embodiment of the application. Figure 7 It is a schematic diagram of the surface structure of a stirring shaft of an embodiment of the application.

[0019] Reference signs: 100, mixing cylinder; 110, linear driver; 120, straight toothed rod; 130, pushing plate; 101, cover plate; 102, driving rod; 200, multi-axis mixing assembly; 210, fixed seat; 220, swing box; 230, first driving motor; 240, second driving motor; 250, transmission shaft; 221, gear sleeve ring; 222, transmission belt; 223, worm drive; 224, rudder tooth ring; 251, transmission tooth; 300, stirring shaft; 310, paddle rod; 320, spiral belt; 400, double screw extrusion granulator. DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the application clearer and more explicit, the application will be further described in detail below with reference to specific embodiments and drawings. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict. These descriptions are only exemplary and are not intended to limit the scope of the application.

[0021] The application will be further described below with reference to the drawings. Figures 1-7As shown, the detailed description of the present application provides a high flexibility TPEE material and its preparation device. Example 1

[0022] Referring to Figure 1 As shown, the present embodiment provides a high flexibility TPEE material and its preparation device. The preparation device includes a mixing cylinder 100, a multi-axis mixing assembly 200, a stirring shaft 300 and a granulator 400 fixed to one end of the mixing cylinder. The specific structure and working process are as follows: As Figure 1 The mixing cylinder 100 is the main part of the whole device, and the top surface is provided with a cover plate 101 which is rotatably installed on the top surface of the mixing cylinder 100.

[0023] The surface of the cover plate 101 is movably installed with a driving rod 102, which is used to drive the cover plate 101 to open and close, so as to control the addition of materials and the mixing process.

[0024] The multi-axis mixing assembly 200 is composed of a fixed seat 210, a swing box 220 and a transmission shaft 250.

[0025] The fixed seat 210 is fixed to the bottom of the cover plate 101. When the cover plate 101 is closed, the stirring shaft 300 enters the inside of the mixing cylinder 100.

[0026] The inside of the swing box 220 is installed with a plurality of tooth sleeve rings 221, each of which is connected to a worm gear driver 223 through a transmission belt 222, and the worm gear driver 223 is driven by a first driving motor 230, thereby controlling the rotary motion of the stirring shaft 300.

[0027] The transmission shaft 250 is in transmission connection with the output end of the second driving motor 240 fixed to one end of the fixed seat 210 through a transmission tooth 251. During the rotation of the transmission shaft 250, the end of the swing box 220 is driven by the transmission tooth 251, so that the swing box 220 performs reciprocating deflection motion on the surface of the fixed seat 210, thereby realizing the reciprocating swing of the stirring shaft 300.

[0028] The stirring shaft 300 is provided with a plurality of paddle rods 310 and spiral belts 320. The paddle rods 310 are used to increase the disturbance and shear force in the mixing process, and the spiral belts 320 help to promote the flow of materials. Through the synchronous control of the first driving motor 230 and the second driving motor 240, the stirring shaft 300 not only rotates continuously, but also realizes reciprocating swing during rotation, thereby enhancing the mixing uniformity.

[0029] Linear driver 110 and push plate 130: One side of the mixing cylinder 100 is fixedly installed with a linear driver 110, and the inner side is slidably installed with a push plate 130. One side of the push plate 130 is fixedly connected with a gear shaft 120, the gear shaft 120 is driven by a motor, and the push plate 130 is pushed to slide linearly along the inner side of the mixing cylinder, assisting the advancement and mixing of the material.

[0030] Granulator 400: After mixing, the molten material enters the granulator 400 through the bottom of the mixing cylinder 100. In this process, the material is cooled and granulated, and finally a high- flexibility TPEE material is obtained.

[0031] This embodiment further illustrates the structure of the multi-shaft mixing assembly 200 and the stirring shaft 300 and its working principle.

[0032] The multi-shaft mixing assembly 200 is composed of a fixed seat 210, a swing box 220 and a transmission shaft 250. The fixed seat 210 is fixed at the bottom of the mixing cylinder 100, and the swing box 220 and the transmission shaft 250 are supported by the fixed seat 210. The inner side of the swing box 220 is provided with a plurality of gear sleeve rings 221, each gear sleeve ring 221 is connected to a worm gear driver 223 through a transmission belt 222, the worm gear driver 223 is driven by a first driving motor 230 to control the rotary motion of the stirring shaft 300. The transmission shaft 250 is in transmission connection with the output end of the second driving motor 240 fixed at one end of the fixed seat 210 through a transmission gear 251, so that the swing box 220 performs reciprocating deflection motion on the surface of the fixed seat 210, and then the reciprocating swing of the stirring shaft 300 is realized.

[0033] The stirring shaft 300 is provided with a plurality of paddle rods 310 and spiral belts 320. The paddle rods 310 are arranged in a ring shape, which can effectively disturb the material during stirring and promote the uniform dispersion of the toughening agent and lubricant. The spiral belts 320 are arranged along the length direction of the stirring shaft 300, which helps the material to flow uniformly in the mixing cylinder 100 and prevents the material from accumulating in a certain area. Through the synchronous control of the first driving motor 230 and the second driving motor 240, the stirring shaft 300 not only rotates continuously, but also realizes reciprocating swing during rotation, which enhances the mixing uniformity.

[0034] The surface of the stirring shaft 300 is provided with paddle rods 310 and spiral belts 320. The paddle rods 310 are arranged in a ring shape, which can effectively disturb the material during stirring and promote the uniform dispersion of the toughening agent and lubricant. The spiral belts 320 are arranged along the length direction of the stirring shaft 300, which helps the material to flow uniformly in the mixing cylinder 100 and prevents the material from accumulating in a certain area. Example 2

[0035] In combination with the components of the present application, the working process is further illustrated as follows: Raw material preparation: According to claim 2, each component is weighed in proportion: TPEE base accounts for 85%-90%, toughening agent accounts for 10%-15%, lubricant accounts for 2%-5%.

[0036] Mixing process: The weighed TPEE, toughening agent and lubricant are sequentially added into the mixing cylinder 100. The cover plate 101 is driven by the driving rod 102 to open and close, ensuring that the materials are uniformly entered into the mixing cylinder.

[0037] Start the first drive motor 230 and the second drive motor 240 to drive the stirring shaft 300 to rotate and reciprocate, generating multi-dimensional shear force to promote uniform dispersion of each component.

[0038] Transportation process: Start the linear actuator 110 to drive the push plate 130 to slide linearly along the inside of the mixing cylinder through the gear shaft 120, pushing the material to one side and into the double screw extruder granulator 400.

[0039] Melt extrusion and granulation: In the double screw extruder granulator 400, the temperature is controlled between 200-240°C to ensure that the material is fully melted but avoid thermal degradation. After the melt mixture is cooled by the cooling system, it is granulated to obtain high flexibility TPEE material.

[0040] Finished product output: The high flexibility TPEE material after granulation is output in the form of particles, which can be used for subsequent injection molding, extrusion and other processing processes to produce various high flexibility TPEE products. Example 3

[0041] Combination Figures 1 to 7 As shown in the embodiment, the working process of the entire preparation device and the synergistic effect of each component are comprehensively explained: Material input: According to the formula proportion, the TPEE base, toughening agent and lubricant are sequentially input into the mixing cylinder 100.

[0042] Mixing and stirring: Start the driving rod 102 to drive the cover plate 101 to open and close, ensuring that the materials are uniformly entered into the mixing cylinder. Start the first drive motor 230 and the second drive motor 240 to drive the stirring shaft 300 to rotate and reciprocate, generating multi-dimensional shear force to promote uniform dispersion of each component.

[0043] The paddle rod 310 and the screw belt 320 of the stirring shaft 300 generate shear force and disturbance force during the mixing process, ensuring uniform dispersion of each component and improving the flexibility and impact toughness of the material.

[0044] Transportation and extrusion: Start the linear actuator 110 to drive the push plate 130 to slide linearly along the inside of the mixing cylinder, pushing the material to one side and into the double screw extruder granulator 400.

[0045] Cooling and Pelletizing: In the twin-screw extruder pelletizer 400, by controlling the temperature between 200-240°C, ensure that the material is fully melted but avoid thermal degradation.

[0046] After the molten mixture is cooled by the cooling system, it is fed into the pelletizer 400 for pelletization, obtaining high flexibility TPEE material.

[0047] Finished Product Output: The high flexibility TPEE material after pelletization is output in the form of particles for subsequent injection molding, extrusion and other processing processes, producing various high flexibility TPEE products.

[0048] In combination with the overall structure and workflow of the present application, the application effect of the present application in actual production is further explained: Material Performance: By optimizing the formula ratio of TPEE base material 85%-90%, toughening agent 10%-15%, lubricant 2%-5% and using multi-axis stirring mixing device, the TPEE material prepared by the present application has significant high flexibility and excellent impact toughness.

[0049] Uniformly dispersed toughening agent and lubricant ensure that the material maintains high strength and heat resistance while effectively improving flexibility and impact toughness, meeting the needs of various high-demand application scenarios.

[0050] Production Efficiency and Equipment Stability: The multi-axis mixing device significantly improves mixing efficiency, shortens mixing time, and improves the overall production capacity of the production line through multi-directional stirring motion.

[0051] Balanced mechanical load distribution reduces equipment vibration and wear, prolongs equipment service life, reduces maintenance costs, and ensures long-term stable operation of the production process.

[0052] Product Quality: Optimized mixing process and uniform component dispersion ensure the performance consistency and high quality of each batch of material, improving product reliability and market competitiveness.

[0053] The high flexibility TPEE material after pelletization has excellent impact resistance, wear resistance and elastic modulus, suitable for automotive parts, electronic device housings, medical devices and other fields, meeting the needs of different application scenarios.

[0054] As can be seen from the detailed description of the foregoing specific embodiments, the high-flexibility TPEE material and its preparation device provided by the present application achieve uniform dispersion of the toughening agent and lubricant by optimizing the material formula and using a multi-shaft stirring mixing device, significantly improving the flexibility and impact toughness of the material. At the same time, the multi-shaft stirring design of the preparation device improves the mixing efficiency and production stability, ensuring the consistency of product quality and long-term stable operation of the equipment. These specific embodiments fully demonstrate the effectiveness and superiority of the present application in solving the problems of insufficient flexibility and uneven mixing in the prior art.

[0055] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A high-flexibility TPEE material, characterized in that, Includes the following components: Base material: TPEE with a hardness of 40D, accounting for 80%-90% of the total weight; Toughening agent: selected from polybutadiene (BR), polyvinyl alcohol (PEO), polyacrylonitrile (PAN) and their blends, accounting for 10%-20% of the total weight; Lubricant: Selected from paraffin wax, polyethylene wax, fatty acid esters and their blends, accounting for 1%-5% of the total weight; Weigh the TPEE, toughening agent, and lubricant according to the above proportions, add each component to a mixing and stirring device and mix thoroughly. Then, melt and extrude the mixture through a twin-screw extruder. Cool and granulate to obtain a high-flexibility TPEE material.

2. The high-flexibility TPEE material according to claim 1, characterized in that, The specific weight percentages of each component are as follows: TPEE: 85%-90%; toughening agent: 10%-15%; lubricant: 2%-5%.

3. The high-flexibility TPEE material according to claim 1, characterized in that, The toughening agent is selected from any one or more of the following: polybutadiene (BR), polyvinyl alcohol (PEO), polyacrylonitrile (PAN), and blends thereof; the lubricant is selected from any one or more of the following: paraffin wax, polyethylene wax, fatty acid esters, and blends thereof.

4. The high-flexibility TPEE material according to claim 1, characterized in that, The hardness of the TPEE is in the range of 30D-50D, the amount of toughening agent added is 10%-20%, and the amount of lubricant added is 2%-5%.

5. The high-flexibility TPEE material according to claim 1, characterized in that, The temperature of the twin-screw extrusion granulation is controlled between 200-240°C to ensure that the material is fully melted but avoids thermal degradation.

6. An apparatus for preparing a highly flexible TPEE material, characterized in that, The mixing cylinder (100), multi-shaft mixing assembly (200), stirring shaft (300), and twin-screw extruder (400) fixed to one end of the mixing cylinder (100) are provided. A cover plate (101) is rotatably mounted on the top surface of the mixing cylinder (100). Drive rods (102) connected to both sides of the cover plate (101) are movably mounted on the surface of the mixing cylinder (100). The drive rods (102) are used to drive the cover plate (101) to open and close. The multi-shaft mixing assembly (200) is fixed to the bottom surface of the cover plate (101). The multi-shaft mixing assembly (200) includes a fixed base (210), a swing box (220), and a transmission shaft (250), as well as a first drive motor (230) and a second drive motor (240) respectively fixed to the ends of the swing box (220) and the fixed base (210). Several... A gear sleeve (221) is fixedly connected to each of the gear sleeves (221) in a corresponding manner. A transmission belt (222) is sleeved on the surface of each gear sleeve (221). A worm gear drive (223) is connected to the output end of the first drive motor (230). The worm gear drive (223) and the transmission belt (222) are used for the transmission connection between the first drive motor (230) and each gear sleeve (221). A rudder gear ring (224) is fixedly installed on the surface of the fixed seat (210) at both ends of the swing box (220). The transmission shaft (250) is rotatably installed on one side of the fixed seat (210), and the end of the transmission shaft (250) is fixedly connected to a transmission tooth (251) that drives the output end of the second drive motor (240). The surface of the transmission shaft (250) and the surface of the rudder gear ring (224) are connected in a transmission connection.

7. The apparatus for preparing a high-flexibility TPEE material according to claim 6, characterized in that, A linear actuator (110) is fixedly installed on one side of the mixing cylinder (100), and a pusher plate (130) is slidably installed on the inner side of the mixing cylinder (100). A spur gear (120) is fixedly connected to one side of the pusher plate (130). The linear actuator (110) is used to drive the spur gear (120) and the pusher plate (130) to slide linearly along the inner side of the mixing cylinder (100). One end of the twin-screw extruder (400) is connected to the interior of the mixing cylinder (100). The spur gear (120) includes a motor and a gear shaft fixed to the output end of the motor for meshing and transmission with the surface of the spur gear (120).

8. The apparatus for preparing a high-flexibility TPEE material according to claim 6, characterized in that, Several stirring shafts (300) are arranged in a straight line along the surface of the swing box (220) and are synchronously driven by a toothed collar (221) and a first drive motor (230). The surface of the stirring shaft (300) is provided with a paddle rod (310) and a screw ribbon (320).

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