Flame-treatment-free sprayable modified PP

Abstract

The invention belongs to the technical field of plastic particle processing, and particularly relates to flame-treatment-free sprayable modified PP (polypropylene) which comprises the following raw materials in parts: 30-50 parts of PP plastic, 2-5 parts of maleic anhydride, 1-2 parts of an antioxidant, 5-10 parts of talcum powder, 1-10 parts of a flame retardant, 1-10 parts of a stabilizer and 1-10 parts of a dispersing agent. The stabilizer comprises one or more of calcium zinc, an organic tin compound and magnesium or zinc salt, the flame retardant is aluminum hydroxide, the antioxidant is butylated hydroxytoluene, and the dispersant is sodium polyacrylate. The preparation method comprises the following specific steps that a treatment box is included, and a discharging door is hinged to the front side of the treatment box; quantitative feeding of an antioxidant, a flame retardant, a stabilizer and a dispersing agent is achieved through a simple structure, accurate matching of the antioxidant, the flame retardant, the stabilizer and the dispersing agent to polypropylene can be achieved, the modification effect of the polypropylene can be guaranteed, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle processing, in particular to a flame-free sprayable modified PP. Background Art

[0002] Modified PP (polypropylene) refers to the modification of polypropylene materials to improve their performance and application range. Polypropylene is a lightweight, chemically and heat-resistant thermoplastic, but it may be deficient in some aspects, such as impact resistance, low temperature resistance, fluidity, etc. These properties can be improved through modification, making it more suitable for specific applications.

[0003] In the prior art, based on flame-free sprayable modified PP, the treatment of PP (polypropylene) plastic is not comprehensive enough, which easily affects the spraying performance of the modified PP. Therefore, we proposed flame-free sprayable modified PP to solve the above problems. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a flame-free sprayable modified PP.

[0005] The flame-treatment-free sprayable modified PP provided by the present invention comprises the following raw materials: 30-50 parts of PP plastic, 2-5 parts of maleic anhydride, 1-2 parts of antioxidant, 5-10 parts of talc, 1-10 parts of flame retardant, 1-10 parts of stabilizer and 1-10 parts of dispersant.

[0006] Preferably, the stabilizer includes one or more of calcium zinc, organic tin compounds, magnesium or zinc salts, the flame retardant is aluminum hydroxide, the antioxidant is butylated hydroxytoluene, and the dispersant is sodium polyacrylate.

[0007] Preferably, the specific preparation method / steps are as follows: comprising a processing box, wherein a discharge door is hingedly connected to the front side of the processing box; A box cover, the bottom of which contacts the top of the processing box, the top of which is fixedly connected to a feed pipe, and a sealing cover is hinged on the top of the feed pipe; Two baffle bars are provided, and ends of the two baffle bars close to each other are fixedly installed on the left and right sides of the processing box respectively; Two card-mounted components are provided, and the card-mounted components are provided on one side of the box cover, and the card-mounted components cooperate with corresponding blocking rods; There are multiple heating plates, and the processing box has multiple installation cavities inside, and the heating plates are fixedly installed in the corresponding installation cavities; A quantitative feeding component, which is arranged on the top of the box cover and is used for quantitatively feeding antioxidant, flame retardant, stabilizer and dispersant; A stirring assembly, the stirring assembly includes: a motor, a hexagonal prism, a spiral feed shaft, a fixed ring, two L-shaped scrapers and multiple stirring rods, the motor is fixedly installed on the top of the box cover, the output shaft of the motor passes through the box cover and is rotatably connected to the box cover, the hexagonal prism is fixedly installed on the output shaft of the motor, the bottom end of the spiral feed shaft is rotatably connected to the bottom inner wall of the processing box, the top of the spiral feed shaft is provided with a hexagonal groove, the bottom end of the hexagonal prism can be detached and inserted into the inside of the hexagonal groove, the fixed ring is fixedly sleeved on the spiral feed shaft, the ends of the two L-shaped scrapers close to each other are fixedly installed on the fixed ring, one side of the two L-shaped scrapers is in sliding contact with the inner wall of the processing box, and one end of the stirring rod is fixedly installed on the corresponding L-shaped scraper.

[0008] By means of the above structure, the hexagonal prism can be driven to rotate by starting the motor. At this time, the plug-in limit between the hexagonal prism and the hexagonal groove can drive the spiral feed shaft to rotate. When the spiral feed shaft rotates, the antioxidant, flame retardant, stabilizer and dispersant in the processing box and the polypropylene can be fully blended and stirred. Here, the spiral feed shaft can transport the material at the bottom of the processing box upward to achieve the upper and lower mixing of the material, improve the mixing effect and efficiency, so that the polypropylene can be modified to improve the adhesion. At the same time, the spiral feed shaft drives the fixed ring and the two L-shaped scrapers to rotate, and the inner wall of the processing box can be scraped and cleaned to avoid the polypropylene adhering to the inner wall of the processing box and being inconvenient for subsequent processing. When the two L-shaped scrapers rotate, they can drive multiple stirring rods to rotate and realize the stirring and mixing between polypropylene and antioxidants, flame retardants, stabilizers and dispersants. In this way, rapid blending and stirring between polypropylene and antioxidants, flame retardants, stabilizers and dispersants can be achieved, and the inner wall of the processing box can be cleaned during the stirring process, which is highly practical.

[0009] Preferably, a mounting hole is opened on the front side of the processing box, an observation window is fixedly mounted on the inner wall of the mounting hole, the material of the observation window is tempered glass, and the rear side of the observation window is at the same level as the inner wall of the processing box.

[0010] Furthermore, by providing an observation window, personnel can conveniently check the reaction between polypropylene and the antioxidant, flame retardant, stabilizer and dispersant.

[0011] Preferably, a cylindrical block is fixedly mounted on the bottom end of the spiral feed shaft, a cylindrical groove is provided on the bottom inner wall of the processing box, and the bottom end of the cylindrical block can be detachably inserted into the cylindrical groove.

[0012] Furthermore, by means of the plug-in limit between the cylindrical block and the cylindrical groove, the spiral feed shaft can be stably supported for rotation, and the spiral feed shaft can be easily disassembled and cleaned from the inside of the processing box.

[0013] Preferably, the clamping assembly includes a rotating shaft, a bearing, a screw and a U-shaped rod, one end of the rotating shaft is rotatably connected to one side of the box cover, and the other end of the rotating shaft is fixedly installed on the outside of the bearing. The bearing is fixedly sleeved on the screw, and the bottom end of the screw passes through the top of the U-shaped rod and extends to the inside of the U-shaped rod, and the screw and the U-shaped rod are threadedly connected, and the bottom inner wall of the U-shaped rod cooperates with the corresponding stop rod.

[0014] Furthermore, by rotating the screw rod and cooperating with the threaded connection between the screw rod and the U-shaped rod, the U-shaped rod can be driven to move downward and the extrusion limit between the U-shaped rod and the stop rod can be released. At this time, the bearing and the U-shaped rod are supported by the rotating shaft, and then the U-shaped rod is rotated to make the U-shaped rod and the stop rod move away, thereby realizing the disassembly operation between the box cover and the treatment box. Here, the reverse operation of the above-mentioned structure can realize the rapid installation between the box cover and the treatment box, and in this way, the box cover and the treatment box can be easily disassembled and assembled, thereby facilitating the subsequent cleaning operation of the interior of the treatment box and facilitating maintenance by personnel.

[0015] Preferably, a rubber pad is fixedly bonded to the inner wall of the bottom of the U-shaped rod, and the top of the rubber pad is in contact with the bottom of the corresponding blocking rod.

[0016] Furthermore, by providing the high friction characteristics of the rubber pad, the connection stability between the U-shaped rod and the barrier rod can be improved, thereby ensuring the extrusion stability between the U-shaped rod and the barrier rod.

[0017] Preferably, the quantitative feeding assembly includes a feeding pipe, a quantitative box, a feeding pipe, a piston plate, a screw and a nut. The bottom end of the feeding pipe is fixedly connected to the top of the box cover, the top end of the feeding pipe is fixedly connected to the bottom of the quantitative box, an electric control valve is fixedly installed on the inner wall of the feeding pipe, and scale lines are provided on the front side of the quantitative box. The bottom end of the feeding pipe is fixed to the top of the quantitative box, the piston plate is slidably connected to the inside of the quantitative box, the left end of the screw is rotatably connected to the right side of the piston plate, the bottom of the nut is fixedly installed on the top of the box cover, and the nut is threadedly sleeved on the screw.

[0018] Furthermore, by rotating the screw and cooperating with the threaded connection between the screw and the nut, the piston plate can be driven to move laterally, thereby changing the internal volume of the left side of the metering box. Here, when the adjustment of the cavity formed between the left side of the piston plate and the metering box is completed, the antioxidant, flame retardant, stabilizer and dispersant are added from the feeding pipe to the interior of the metering box. Then, when the antioxidant, flame retardant, stabilizer and dispersant are added, by rotating the screw again and pushing the piston plate to the left, the antioxidant, flame retardant, stabilizer and dispersant can be moved to the left and fed to the interior of the treatment box through the feeding pipe. In this way, the quantitative addition of antioxidants, flame retardants, stabilizers and dispersants can be achieved, the precise ratio between antioxidants, flame retardants, stabilizers and dispersants and polypropylene can be achieved, and the modification effect of polypropylene can be guaranteed. Preferably, PP plastic, maleic anhydride and talcum powder are placed in a processing box, the heating plate heats the temperature inside the processing box to 50-70 degrees Celsius, the rotation speed is 100-120 revolutions per minute, and after stirring for 10-15 minutes, antioxidants, flame retardants, stabilizers and dispersants are added to the inside of the processing box, the temperature is increased to 80-120 degrees Celsius, the rotation speed is increased to 100-180 revolutions per minute, and after stirring for 20-25 minutes, the modified PP plastic is obtained.

[0019] The beneficial effects of the present invention are: 1. The hexagonal prism can be driven to rotate by starting the motor. At this time, the hexagonal prism and the hexagonal groove can be used to drive the spiral feed shaft to rotate. When the spiral feed shaft rotates, the antioxidant, flame retardant, stabilizer and dispersant in the treatment box can be fully blended and stirred with the polypropylene. Here, the spiral feed shaft can transport the material at the bottom of the treatment box upward to achieve the upper and lower mixing of the material, improve the mixing effect and efficiency, so that the polypropylene can be modified to improve the adhesion. At the same time, the spiral feed shaft drives the fixed ring and the two L-shaped scrapers to rotate, and the inner wall of the treatment box can be scraped and cleaned to avoid the polypropylene adhering to the inner wall of the treatment box, which is inconvenient for subsequent treatment. When the two L-shaped scrapers rotate, they can drive multiple stirring rods to rotate and realize the stirring and mixing of polypropylene and antioxidants, flame retardants, stabilizers and dispersants. In this way, rapid blending and stirring of polypropylene and antioxidants, flame retardants, stabilizers and dispersants can be achieved, and the inner wall of the treatment box can be cleaned during the stirring process, which is highly practical. 2. By rotating the screw rod and the threaded connection between the screw rod and the U-shaped rod, the U-shaped rod can be driven to move downward and the extrusion limit between the U-shaped rod and the stop rod can be released. At this time, the bearing and the U-shaped rod are supported by the rotating shaft, and then the U-shaped rod is rotated to make the U-shaped rod and the stop rod move away, so that the box cover and the treatment box can be disassembled. Here, the reverse operation of the above structure can be used to achieve rapid installation between the box cover and the treatment box, and in this way, the box cover and the treatment box can be easily disassembled and assembled, so as to facilitate the subsequent cleaning operation of the interior of the treatment box and facilitate maintenance by personnel; 3. By rotating the screw and through the threaded connection between the screw and the nut, the piston plate can be driven to move horizontally, so that the internal volume of the left side of the quantitative box can be changed. Here, when the volume cavity formed between the left side of the piston plate and the quantitative box is adjusted, the antioxidant, flame retardant, stabilizer and dispersant are added from the feeding pipe to the inside of the quantitative box. Then, when the antioxidant, flame retardant, stabilizer and dispersant are added, the antioxidant, flame retardant, stabilizer and dispersant are moved to the left by rotating the screw again and pushing the piston plate to move left, and the antioxidant, flame retardant, stabilizer and dispersant are added to the inside of the treatment box through the feeding pipe; The invention realizes quantitative addition of antioxidant, flame retardant, stabilizer and dispersant through a simple structure, can realize accurate proportion between antioxidant, flame retardant, stabilizer and dispersant and polypropylene, can ensure the modification effect of polypropylene, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural front view of the flame-free sprayable modified PP proposed by the present invention; Figure 2 This is a main cross-sectional view of the structure of the flame-treatment-free sprayable modified PP proposed by the present invention; Figure 3 The invention provides a flame-free sprayable modified PP. Figure 1 The structural diagram of part A in the figure; Figure 4 This is a structural side view of the rotating shaft, bearing, screw, U-shaped rod and rubber pad of the flame-free sprayable modified PP proposed by the present invention; Figure 5 This is a three-dimensional structural diagram of the motor, hexagonal prism, spiral feed shaft and hexagonal groove of the flame-treatment-free sprayable modified PP proposed in the present invention.

[0021] In the figure: 1. processing box; 2. box cover; 3. stopper; 4. rotating shaft; 5. bearing; 6. screw; 7. U-shaped rod; 8. rubber pad; 9. feed pipe; 10. sealing cover; 11. discharge door; 12. observation window; 13. motor; 14. hexagonal prism; 15. spiral feed shaft; 16. hexagonal groove; 17. cylindrical block; 18. cylindrical groove; 19. fixing ring; 20. L-shaped scraper; 21. stirring rod; 22. heating plate; 23. feed pipe; 24. quantitative box; 25. feeding pipe; 26. piston plate; 27. screw; 28. nut; 29. ​​scale line; 30. electric control valve. DETAILED DESCRIPTION

[0022] The present invention will be further explained below in conjunction with specific embodiments.

[0023] refer to Figure 1-Figure 5 In this embodiment, a flame-free sprayable modified PP is proposed, which includes the following raw materials: 30-50 parts of PP plastic, 2-5 parts of maleic anhydride, 1-2 parts of antioxidant, 5-10 parts of talc, 1-10 parts of flame retardant, 1-10 parts of stabilizer and 1-10 parts of dispersant.

[0024] In this embodiment, the stabilizer includes one or more of calcium zinc, organic tin compounds, magnesium or zinc salts, the flame retardant is aluminum hydroxide, the antioxidant is butylated hydroxytoluene, and the dispersant is sodium polyacrylate.

[0025] In this embodiment, the specific preparation method / steps are as follows: comprising a processing box 1, a discharge door 11 is hingedly connected to the front side of the processing box 1; A box cover 2, the bottom of which is in contact with the top of the processing box 1, the top of which is fixedly connected with a feed pipe 9, and the top of which is hinged with a sealing cover 10; The blocking rods 3 are provided in pairs, and the ends of the two blocking rods 3 close to each other are fixedly installed on the left and right sides of the processing box 1 respectively; Two card-mounted components are provided, and the card-mounted components are provided on one side of the box cover 2, and the card-mounted components cooperate with the corresponding blocking rod 3; There are multiple heating plates 22, and the processing box 1 has multiple installation cavities inside, and the heating plates 22 are fixedly installed in the corresponding installation cavities; A quantitative feeding component is arranged on the top of the box cover 2, and is used for quantitative feeding of antioxidant, flame retardant, stabilizer and dispersant; A stirring assembly, the stirring assembly includes: a motor 13, a hexagonal prism 14, a spiral feed shaft 15, a fixing ring 19, two L-shaped scrapers 20 and a plurality of stirring rods 21, the motor 13 is fixedly mounted on the top of the box cover 2, the output shaft of the motor 13 passes through the box cover 2 and is rotatably connected to the box cover 2, the hexagonal prism 14 is fixedly mounted on the output shaft of the motor 13, the bottom end of the spiral feed shaft 15 is rotatably connected to the bottom inner wall of the processing box 1, the top of the spiral feed shaft 15 is provided with a hexagonal groove 16, the bottom end of the hexagonal prism 14 can be detached and inserted into the inside of the hexagonal groove 16, the fixing ring 19 is fixedly sleeved on the spiral feed shaft 15, the ends of the two L-shaped scrapers 20 close to each other are fixedly mounted on the fixing ring 19, one side of the two L-shaped scrapers 20 is in sliding contact with the inner wall of the processing box 1, and one end of the stirring rod 21 is fixedly mounted on the corresponding L-shaped scraper 20.

[0026] By means of the above structure, the hexagonal prism can be driven to rotate by starting the motor. At this time, the plug-in limit between the hexagonal prism and the hexagonal groove can drive the spiral feed shaft to rotate. When the spiral feed shaft rotates, the antioxidant, flame retardant, stabilizer and dispersant in the processing box and the polypropylene can be fully blended and stirred. Here, the spiral feed shaft can transport the material at the bottom of the processing box upward to achieve the upper and lower mixing of the material, improve the mixing effect and efficiency, so that the polypropylene can be modified to improve the adhesion. At the same time, the spiral feed shaft drives the fixed ring and the two L-shaped scrapers to rotate, and the inner wall of the processing box can be scraped and cleaned to avoid the polypropylene adhering to the inner wall of the processing box and being inconvenient for subsequent processing. When the two L-shaped scrapers rotate, they can drive multiple stirring rods to rotate and realize the stirring and mixing between polypropylene and antioxidants, flame retardants, stabilizers and dispersants. In this way, rapid blending and stirring between polypropylene and antioxidants, flame retardants, stabilizers and dispersants can be achieved, and the inner wall of the processing box can be cleaned during the stirring process, which is highly practical.

[0027] In this embodiment, a mounting hole is opened on the front side of the processing box 1, and an observation window 12 is fixedly installed on the inner wall of the mounting hole. The material of the observation window 12 is tempered glass, and the rear side of the observation window 12 is at the same horizontal height as the inner wall of the processing box 1. By setting the observation window, personnel can conveniently check the reaction between polypropylene and antioxidants, flame retardants, stabilizers and dispersants.

[0028] In this embodiment, a cylindrical block 17 is fixedly installed on the bottom end of the spiral feed shaft 15, and a cylindrical groove 18 is opened on the bottom inner wall of the processing box 1. The bottom end of the cylindrical block 17 can be detached and inserted into the cylindrical groove 18. Through the insertion limit between the cylindrical block and the cylindrical groove, the spiral feed shaft can be stably supported for rotation, and the spiral feed shaft can be easily disassembled and cleaned from the inside of the processing box.

[0029] The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6. The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6. The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6. The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6. The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6. The U-shaped rod 7 is a kind of U-shaped rod with a plurality of cams 4, 5 and 6.

[0030] In this embodiment, a rubber pad 8 is fixedly bonded to the inner wall of the bottom of the U-shaped rod 7, and the top of the rubber pad 8 is in contact with the bottom of the corresponding baffle rod 3. By setting the high friction characteristics of the rubber pad, the connection stability between the U-shaped rod and the baffle rod can be improved, and the extrusion stability between the U-shaped rod and the baffle rod can be ensured.

[0031] In this embodiment, the quantitative feeding assembly includes a feeding pipe 23, a quantitative box 24, a feeding pipe 25, a piston plate 26, a screw rod 27 and a nut 28. The bottom end of the feeding pipe 23 is fixedly connected to the top of the box cover 2, and the top end of the feeding pipe 23 is fixedly connected to the bottom of the quantitative box 24. An electric control valve 30 is fixedly installed on the inner wall of the feeding pipe 23. A scale line 29 is provided on the front side of the quantitative box 24. The bottom end of the feeding pipe 25 is fixedly connected to the top of the quantitative box 24. The piston plate 26 is slidably connected to the inside of the quantitative box 24. The left end of the screw rod 27 is rotatably connected to the right side of the piston plate 26. The bottom of the nut 28 is fixedly installed on the top of the box cover 2. The nut 28 is threadedly sleeved on the screw rod 27. By rotating the screw rod and through the threaded connection between the screw rod and the nut, the movable The plug plate moves laterally, thereby being able to change the internal volume of the left side of the metering box. Here, when the volume cavity formed between the left side of the piston plate and the metering box is adjusted, the antioxidant, flame retardant, stabilizer and dispersant are added from the feeding pipe to the interior of the metering box. Then, when the antioxidant, flame retardant, stabilizer and dispersant are added, by rotating the screw rod again and pushing the piston plate to the left, the antioxidant, flame retardant, stabilizer and dispersant can be moved to the left and added to the interior of the treatment box through the feeding pipe. In this way, quantitative addition of antioxidants, flame retardants, stabilizers and dispersants can be achieved, and the precise ratio between antioxidants, flame retardants, stabilizers and dispersants and polypropylene can be achieved, which can ensure the modification effect of polypropylene. In this embodiment, PP plastic, maleic anhydride and talcum powder are placed in a processing box 1, and the heating plate 22 heats the temperature inside the processing box 1 to 50-70 degrees Celsius, the rotation speed is 100-120 revolutions per minute, and after stirring for 10-15 minutes, an antioxidant, a flame retardant, a stabilizer and a dispersant are added to the interior of the processing box 1, the temperature is increased to 80-120 degrees Celsius, the rotation speed is increased to 100-180 revolutions per minute, and after stirring for 20-25 minutes, a modified PP plastic is obtained.

[0032] It should be noted that the specific types of motor 13, heating plate 22 and electric control valve 30 to be used are selected by relevant technical personnel familiar with the field, and the above motor 13, heating plate 22 and electric control valve 30 are all existing technologies and will not be elaborated in this solution.

[0033] Working principle: When in use, first connect the motor 13, the heating plate 22 and the electric control valve 30 to the external power supply, then open the sealing cover 10 and put the PP plastic, maleic anhydride and talcum powder into the processing box 1, the heating plate 22 heats the temperature inside the processing box 1 to 50-70 degrees Celsius, then close the sealing cover 10, and then start the motor 13 (speed 100-120 revolutions per minute) to drive the hexagonal prism 14 to rotate, at this time, through the plug-in limit between the hexagonal prism 14 and the hexagonal groove 16, it can drive the spiral feed shaft 15 to rotate, and when the spiral feed shaft 15 rotates, it can PP plastic, maleic anhydride and talcum powder inside the processing box 1 Mix and stir. After stirring for 10-15 minutes, add the antioxidant, flame retardant, stabilizer and dispersant into the interior of the treatment box 1. Here, by rotating the screw 27 and the threaded connection between the screw 27 and the nut 28, the piston plate 26 can be driven to move horizontally, so as to change the internal volume of the left side of the quantitative box 24. Here, when the adjustment of the cavity formed between the left side of the piston plate 26 and the quantitative box 24 is completed, the antioxidant, flame retardant, stabilizer and dispersant are added to the interior of the quantitative box 24 from the feeding pipe 25 in turn. Then, when the antioxidant, flame retardant, stabilizer and dispersant are added, the screw 27 is rotated again and the piston plate 26 is pushed to the left. The antioxidant, flame retardant, stabilizer and dispersant are moved to the left in turn and added to the inside of the processing box 1 through the feed pipe 23. In this way, the quantitative addition of the antioxidant, flame retardant, stabilizer and dispersant can be achieved, and the precise ratio between the antioxidant, flame retardant, stabilizer and dispersant and polypropylene can be achieved, which can ensure the modification effect of polypropylene. Then, after the antioxidant, flame retardant, stabilizer and dispersant are added to the polypropylene, the temperature is increased to 80-120 degrees Celsius, the speed is increased to 100-180 revolutions per minute, and the modified PP plastic is obtained after stirring for 20-25 minutes. Then, the discharge door 11 is opened and the polypropylene is discharged and collected. Finally, by rotating the screw 6 and the threaded connection between the screw 6 and the U-shaped rod 7, the U-shaped rod 7 can be driven to move downward and the extrusion limit between the U-shaped rod 7 and the stop rod 3 can be released. At this time, the bearing 5 and the U-shaped rod 7 are supported by the rotating shaft 4, and then the U-shaped rod 7 is rotated to make the U-shaped rod 7 and the stop rod 3 move away, so that the disassembly operation between the box cover 2 and the treatment box 1 can be realized. Here, the reverse operation of the above-mentioned structure can realize the rapid installation of the box cover 2 and the treatment box 1, and in this way, the box cover 2 and the treatment box 1 can be easily disassembled and assembled, thereby facilitating the subsequent cleaning operation of the interior of the treatment box 1 and facilitating maintenance by personnel.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Flame-free sprayable modified PP, characterized in that: The raw materials include the following parts: 30-50 parts of PP plastic, 2-5 parts of maleic anhydride, 1-2 parts of antioxidant, 5-10 parts of talc, 1-10 parts of flame retardant, 1-10 parts of stabilizer and 1-10 parts of dispersant.

2. The flame-free sprayable modified PP according to claim 1, characterized in that The stabilizer includes one or more of calcium zinc, organic tin compounds, magnesium or zinc salts, the flame retardant is aluminum hydroxide, the antioxidant is butylated hydroxytoluene, and the dispersant is sodium polyacrylate.

3. The flame-free sprayable modified PP according to claims 1-2, characterized in that: The specific preparation method is as follows: comprising a processing box (1), wherein a discharge door (11) is hingedly connected to the front side of the processing box (1); A box cover (2), the bottom of the box cover (2) being in contact with the top of the processing box (1), the top of the box cover (2) being fixedly connected to a feed pipe (9), and the top of the feed pipe (9) being hingedly connected to a sealing cover (10); Two baffle bars (3) are provided, and ends of the two baffle bars (3) close to each other are respectively fixedly mounted on the left and right sides of the processing box (1); Two card-mounted components are provided, the card-mounted components are provided on one side of the box cover (2), and the card-mounted components cooperate with corresponding blocking rods (3); A plurality of heating plates (22) are provided, a plurality of installation cavities are provided inside the processing box (1), and the heating plates (22) are fixedly installed in corresponding installation cavities; A quantitative feeding component, the quantitative feeding component is arranged on the top of the box cover (2), and is used for quantitatively feeding the antioxidant, the flame retardant, the stabilizer and the dispersant; A stirring assembly, the stirring assembly comprising: a motor (13), a hexagonal prism (14), a spiral feed shaft (15), a fixing ring (19), two L-shaped scrapers (20) and a plurality of stirring rods (21), the motor (13) being fixedly mounted on the top of a box cover (2), the output shaft of the motor (13) passing through the box cover (2) and being rotatably connected to the box cover (2), the hexagonal prism (14) being fixedly mounted on the output shaft of the motor (13), the bottom end of the spiral feed shaft (15) being rotatably connected to the bottom of a processing box (1) On the inner wall of the bottom, a hexagonal groove (16) is formed at the top of the spiral feed shaft (15), and the bottom end of the hexagonal column (14) can be detachably inserted into the inside of the hexagonal groove (16). A fixing ring (19) is fixedly sleeved on the spiral feed shaft (15), and the ends of the two L-shaped scrapers (20) close to each other are fixedly mounted on the fixing ring (19), one side of the two L-shaped scrapers (20) is in sliding contact with the inner wall of the processing box (1), and one end of the stirring rod (21) is fixedly mounted on the corresponding L-shaped scraper (20).

4. The flame-free sprayable modified PP according to claim 3, characterized in that: The front side of the processing box (1) is provided with a mounting hole, and an observation window (12) is fixedly mounted on the inner wall of the mounting hole. The material of the observation window (12) is tempered glass, and the rear side of the observation window (12) is at the same level as the inner wall of the processing box (1).

5. The flame-free sprayable modified PP according to claim 3, characterized in that: A cylindrical block (17) is fixedly mounted on the bottom end of the spiral feed shaft (15), and a cylindrical groove (18) is provided on the inner wall of the bottom of the processing box (1). The bottom end of the cylindrical block (17) can be detachably inserted into the cylindrical groove (18).

6. The flame-free sprayable modified PP according to claim 3, characterized in that: The clamping assembly comprises a rotating shaft (4), a bearing (5), a screw rod (6) and a U-shaped rod (7); one end of the rotating shaft (4) is rotatably connected to one side of the box cover (2); the other end of the rotating shaft (4) is fixedly mounted on the outer side of the bearing (5); the bearing (5) is fixedly sleeved on the screw rod (6); the bottom end of the screw rod (6) passes through the top of the U-shaped rod (7) and extends to the inside of the U-shaped rod (7); the screw rod (6) and the U-shaped rod (7) are threadedly connected; the bottom inner wall of the U-shaped rod (7) is matched with the corresponding stop rod (3).

7. The flame-free sprayable modified PP according to claim 6, characterized in that: A rubber pad (8) is fixedly bonded to the inner wall of the bottom of the U-shaped rod (7), and the top of the rubber pad (8) is in contact with the bottom of the corresponding blocking rod (3).

8. The flame-treatment-free sprayable modified PP according to claim 3, characterized in that: The quantitative feeding assembly comprises a feeding pipe (23), a quantitative box (24), a feeding pipe (25), a piston plate (26), a screw rod (27) and a nut (28). The bottom end of the feeding pipe (23) is fixedly connected to the top of the box cover (2), the top end of the feeding pipe (23) is fixedly connected to the bottom of the quantitative box (24), an electric control valve (30) is fixedly mounted on the inner wall of the feeding pipe (23), a scale mark (29) is arranged on the front side of the quantitative box (24), the bottom end of the feeding pipe (25) is fixedly mounted on the top of the quantitative box (24), the piston plate (26) is slidably connected to the inside of the quantitative box (24), the left end of the screw rod (27) is rotatably connected to the right side of the piston plate (26), the bottom end of the nut (28) is fixedly mounted on the top of the box cover (2), and the nut (28) is threadedly sleeved on the screw rod (27).

9. The flame-free sprayable modified PP according to claim 3, characterized in that: PP plastic, maleic anhydride and talcum powder are placed in a treatment box (1), and the temperature inside the treatment box (1) is heated to 50-70 degrees Celsius by a heating plate (22) at a rotation speed of 100-120 revolutions per minute. After stirring for 10-15 minutes, an antioxidant, a flame retardant, a stabilizer and a dispersant are added to the inside of the treatment box 1, and the temperature is increased to 80-120 degrees Celsius, the rotation speed is increased to 100-180 revolutions per minute, and after stirring for 20-25 minutes, a modified PP plastic is obtained.

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