CN113021673A - Production equipment and preparation method of degradable polypropylene plastic - Google Patents
Production equipment and preparation method of degradable polypropylene plastic Download PDFInfo
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- CN113021673A CN113021673A CN202110187332.5A CN202110187332A CN113021673A CN 113021673 A CN113021673 A CN 113021673A CN 202110187332 A CN202110187332 A CN 202110187332A CN 113021673 A CN113021673 A CN 113021673A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a production device and a preparation method of degradable polypropylene plastic, and the key points of the technical scheme are as follows: the improved mixing box comprises a base plate, fixed mounting has the mixing box on the upper surface of bottom plate, be equipped with mixing mechanism in the mixing box, mixing mechanism installs through the bearing the mixing box is on the surface, one side of mixing box is equipped with defeated material mechanism, defeated material mechanism fixed mounting is in on the upper surface of bottom plate, the below fixed mounting of mixing box has first discharging pipe, first discharging pipe with defeated material mechanism is connected, one side of defeated material mechanism is equipped with the mounting bracket, fixed mounting has reation kettle on the mounting bracket, and the mixing box that is equipped with is convenient for place degradation polypropylene raw and other materials, makes each raw and other materials intensive mixing through mixing mechanism, is convenient for improve the quality of degradable polypropylene plastics, and defeated material mechanism that is equipped with is convenient for inhale the raw and other materials after mixing mechanism mixes and gets reation kettle in and heat and melt.
Description
Technical Field
The invention relates to the technical field of plastic production, in particular to production equipment of degradable polypropylene plastic and a preparation method thereof.
Background
The disposable plastic products are widely applied to daily life of people due to the advantages of light weight, low price, convenient use and the like. The main components of common disposable plastic products are organic high molecular materials such as polyethylene and the like, which are difficult to decompose in natural environment, resulting in serious 'white pollution' problem. With the progress of science and the increase of environmental awareness, research and development of biodegradable plastics have been receiving more and more attention.
Chinese patent with publication number CN 108518937 a discloses a plastic particle processing equipment for engineering plastic production, which comprises a bottom plate, a drying device located above the bottom plate, a frame device, a lifting device contained in the frame device, an electric cylinder device arranged above the bottom plate, and a cover plate device arranged on the frame device, wherein the bottom plate is provided with a plurality of universal wheels located below the bottom plate and a support located above the bottom plate, the drying device comprises a support plate arranged above the support, a light slider located on the support plate, a first positioning frame, a first spring arranged on the first positioning frame, a heat dissipation frame arranged above the support plate, and a heating rod contained in the heat dissipation frame.
The processing equipment has the advantage of uniform heating; however, the above-mentioned processing equipment still has some disadvantages, such as: the mixing and stirring of various raw materials cannot be carried out, so that the raw materials are fully mixed, and the quality of the degradable polypropylene plastic is not improved.
Disclosure of Invention
The invention aims to provide production equipment of degradable polypropylene plastic and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a production device of degradable polypropylene plastic comprises a bottom plate, a mixing box is fixedly mounted on the upper surface of the bottom plate, a mixing mechanism is arranged in the mixing box, the mixing mechanism is mounted on the surface of the mixing box through a bearing, a material conveying mechanism is arranged on one side of the mixing box, the material conveying mechanism is fixedly mounted on the upper surface of the bottom plate, a first discharging pipe is fixedly mounted below the mixing box and connected with the material conveying mechanism, a mounting frame is arranged on one side of the material conveying mechanism, a reaction kettle is fixedly mounted on the mounting frame, a heating tank is arranged in the reaction kettle, a mounting cavity is formed in the inner side of the reaction kettle and the outer side of the reaction kettle, a heater is arranged in the mounting cavity, a stirring mechanism is arranged in the heating tank, and a first sealing cover is mounted on the upper surface of the heating tank, the rabbling mechanism is installed on the first sealed cover, the below of heating jar is equipped with the second discharging pipe, fixed mounting has the feeder hopper on the first sealed cover.
Preferably, the mixing mechanism includes mixing shaft, mixing rod and first servo motor, the mixing shaft passes through the bearing and rotates and install on the internal surface of mixing box, mixing rod fixed mounting be in on the mixing shaft, first servo motor pass through the shaft coupling with mixing shaft transmission connects, first servo motor fixed mounting be in on the mixing box.
Preferably, the upper hinge of mixing box has the case lid, be equipped with visual window on the upper surface of mixing box.
Preferably, the feeding mechanism comprises a feeding pump and a feeding pipe, a feeding hole of the feeding pump is connected with the first discharging pipe, the feeding pump is installed on the upper surface of the bottom plate, one end of the feeding pipe is connected with a discharging hole of the feeding pump, and the other end of the feeding pipe is installed on the feeding hopper.
Preferably, the stirring mechanism comprises a stirring shaft, a stirring paddle and a second servo motor, the stirring shaft is rotatably installed on the lower surface of the first sealing cover through a bearing, the stirring paddle is fixedly installed on the stirring shaft, the second servo motor is in transmission connection with the stirring shaft through a coupler, and the second servo motor is fixedly installed on the upper surface of the first sealing cover.
Preferably, the stirring paddle is provided with a plurality of stirring paddles, and a plurality of equidistant circulation holes are formed in the surface of each stirring paddle.
Preferably, a control valve is fixedly mounted on the second discharge pipe.
The preparation method of the degradable polypropylene plastic specifically comprises the following steps:
step one, preparing raw materials: taking 40-52 parts of polypropylene, 20-22 parts of starch, 6-9 parts of lignin fiber, 2.5-3.5 parts of coupling agent, 4-6 parts of methyl silicone oil and 6-8 parts of talcum powder according to the mass parts;
step two, mixing primary materials: respectively putting polypropylene, starch, lignin fiber and talcum powder into a mixing box for full mixing, and conveying the mixture into a reaction kettle through a conveying mechanism;
step three, heating and stirring: heating to 70-85 ℃ by a heater to increase the temperature in the reaction kettle, starting a stirring mechanism to stir and heat for 10-15 minutes to obtain a mixture;
step four, mixing secondary materials: adding the coupling agent and the methyl silicone oil into a reaction kettle 7 to be mixed with the mixture, stirring for 40-50 minutes, heating the temperature in the reaction kettle to 190 ℃ at 180 ℃, and preserving the temperature for 50-70 minutes to obtain the degradable polypropylene plastic;
step five, forming: extruding the degradable polypropylene plastic obtained in the step four through a double-screw extruder to form plastic particles.
Preferably, the starch is a modified corn starch.
Preferably, the size of the talcum powder is 500-800 meshes.
Compared with the prior art, the invention has the beneficial effects that:
in this production facility of degradable polypropylene plastics and preparation method thereof, the mixing box that is equipped with is convenient for place degradation polypropylene raw and other materials, make each raw and other materials carry out the intensive mixing through the mixing mechanism, be convenient for improve the quality of degradable polypropylene plastics, the defeated material mechanism that is equipped with is convenient for inhale the reation kettle with the raw and other materials after the mixing mechanism mixes and heats and melt, the rabbling mechanism and the heater that are equipped with are convenient for heat the stirring to the raw and other materials in the heating tank and make, the intensive reaction between each raw and other materials, improve the quality of preparing degradation polypropylene plastics.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a structural cross-sectional view of the present invention;
FIG. 4 is a block flow diagram of the present invention.
In the figure: 1. a base plate; 2. a mixing box; 3. a mixing mechanism; 31. a mixing shaft; 32. a mixing rod; 33. a first servo motor; 4. a material conveying mechanism; 41. a delivery pump; 42. a delivery pipe; 5. a first discharge pipe; 6. a mounting frame; 7. a reaction kettle; 8. a heating tank; 9. installing a cavity; 10. a heater; 11. a stirring mechanism; 111. a stirring shaft; 112. a stirring paddle; 113. a second servo motor; 12. a first sealing cover; 13. a second discharge pipe; 14. a box cover; 15. a visible window; 16. a feed hopper; 17. a flow-through hole; 18. and controlling the valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A production device of degradable polypropylene plastics comprises a bottom plate 1, a mixing box 2 is fixedly installed on the upper surface of the bottom plate 1, a mixing mechanism 3 is arranged in the mixing box 2, the mixing mechanism 3 is installed on the surface of the mixing box 2 through a bearing, a material conveying mechanism 4 is arranged on one side of the mixing box 2, the material conveying mechanism 4 is fixedly installed on the upper surface of the bottom plate 1, a first discharging pipe 5 is fixedly installed below the mixing box 2, the first discharging pipe 5 is connected with the material conveying mechanism 4, an installation frame 6 is arranged on one side of the material conveying mechanism 4, a reaction kettle 7 is fixedly installed on the installation frame 6, a heating tank 8 is arranged in the reaction kettle 7, an installation cavity 9 is arranged on the inner side of the reaction kettle 7 and the outer side of the reaction kettle 7, a heater 10 is arranged in the installation cavity 9, a stirring mechanism 11 is arranged in the heating tank 8, a first sealing cover 12 is installed on the upper surface of the heating tank 8, a second discharge pipe 13 is arranged below the heating tank 8, a feed hopper 16 is fixedly installed on a first sealing cover 12, a mixing box 2 is arranged to facilitate placing of degraded polypropylene raw materials, the raw materials are fully mixed through a mixing mechanism 3 to facilitate improvement of the quality of the degradable polypropylene plastics, a material conveying mechanism 4 is arranged to facilitate sucking of the raw materials mixed by the mixing mechanism 3 into a reaction kettle 7 for heating and melting, a stirring mechanism 11 and a heater 10 are arranged to facilitate heating and stirring of the raw materials in the heating tank 8, so that the raw materials are fully reacted to improve the quality of the prepared degradable polypropylene plastics, the heater 10 is in the prior art and adopts a WDF-IM-3 type heater, the WDF-IM-3 type heater adopts PTC as a heating element, and no open flame exists in the heating process; energy is saved, and the heat conversion efficiency is more than 99%.
In this embodiment, it is preferred, mixing mechanism 3 includes mixing shaft 31, mixing rod 32 and first servo motor 33, mixing shaft 31 passes through the bearing and rotates the installation on the internal surface of mixing box 2, mixing rod 32 fixed mounting is on mixing shaft 31, first servo motor 33 passes through the shaft coupling and is connected with mixing shaft 31 transmission, first servo motor 33 fixed mounting is on mixing box 2, first servo motor 33 passes through the shaft coupling and drives mixing shaft 31 and rotate, it is rotatory to have driven mixing rod 32, be convenient for carry out intensive mixing to each raw and other materials in the mixing box 2.
In this embodiment, it is preferable that the upper part of the mixing box 2 is hinged to a box cover 14, a visible window 15 is provided on the upper surface of the mixing box 2, the box cover 14 is provided to prevent the raw materials in the mixing box 2 from scattering, and the visible window 15 is provided to facilitate observation of the mixing condition of the raw materials.
In this embodiment, it is preferable that the feeding mechanism 4 includes a feeding pump 41 and a feeding pipe 42, a feeding port of the feeding pump 41 is connected to the first discharging pipe 5, the feeding pump 41 is installed on the upper surface of the base plate 1, one end of the feeding pipe 42 is connected to a discharging port of the feeding pump 41, the other end of the feeding pipe 42 is installed on the feeding hopper 16, and the mixed raw material in the mixing box 2 is sucked into the feeding pipe 42 by the feeding pump 41 to flow into the heating tank 8.
In this embodiment, preferably, the stirring mechanism 11 includes a stirring shaft 111, a stirring paddle 112 and a second servo motor 113, the stirring shaft 111 is rotatably installed on the lower surface of the first sealing cover 12 through a bearing, the stirring paddle 112 is fixedly installed on the stirring shaft 111, the second servo motor 113 is in transmission connection with the stirring shaft 111 through a coupler, the second servo motor 113 is fixedly installed on the upper surface of the first sealing cover 12, the second servo motor 113 drives the stirring shaft 111 to rotate through the coupler, and thus the stirring paddle 112 is driven to rotate to fully stir the heated raw material.
In this embodiment, preferably, the stirring paddles 112 are provided with a plurality of stirring paddles, the surfaces of the plurality of stirring paddles 112 are provided with a plurality of equidistant circulation holes 17, and the plurality of equidistant circulation holes 17 improve the circulation of the melted raw materials, thereby improving the quality of the degradable polypropylene plastic.
In this embodiment, a control valve 18 is preferably fixedly mounted on the second discharge pipe 13, and the control valve 18 has the functions of diversion, interception, regulation and throttling.
The preparation method of the degradable polypropylene plastic comprises the following steps:
step one, preparing raw materials: taking 40 parts of polypropylene, 20 parts of starch, 6 parts of lignin fiber, 2.5 parts of coupling agent, 4 parts of methyl silicone oil and 6 parts of talcum powder according to the mass parts;
step two, mixing primary materials: respectively putting polypropylene, starch, lignin fiber and talcum powder into a mixing box 2 for full mixing, and conveying the mixture into a reaction kettle 7 through a conveying mechanism 4;
step three, heating and stirring: heating to 70 ℃ by a heater 10 to increase the temperature in the reaction kettle 7, and starting a stirring mechanism 11 to stir and heat for 10 minutes to obtain a mixture;
step four, mixing secondary materials: adding the coupling agent and the methyl silicone oil into a reaction kettle 7, mixing with the mixture, stirring for 40 minutes, heating the temperature in the reaction kettle 7 to 180 ℃, and preserving the temperature for 50 minutes to obtain the degradable polypropylene plastic;
step five, forming: extruding the degradable polypropylene plastic obtained in the step four through a double-screw extruder to form plastic particles.
In this embodiment, the starch is preferably a modified corn starch.
In this embodiment, the talc powder is preferably 500 mesh.
Example 2
The preparation method of the degradable polypropylene plastic comprises the following steps:
step one, preparing raw materials: taking 52 parts of polypropylene, 22 parts of starch, 9 parts of lignin fiber, 3.5 parts of coupling agent, 6 parts of methyl silicone oil and 8 parts of talcum powder according to the mass parts;
step two, mixing primary materials: respectively putting polypropylene, starch, lignin fiber and talcum powder into a mixing box 2 for full mixing, and conveying the mixture into a reaction kettle 7 through a conveying mechanism 4;
step three, heating and stirring: heating to 85 ℃ by a heater 10 to increase the temperature in the reaction kettle 7, and starting a stirring mechanism 11 to stir and heat for 15 minutes to obtain a mixture;
step four, mixing secondary materials: adding the coupling agent and the methyl silicone oil into a reaction kettle 7, mixing with the mixture, stirring for 50 minutes, heating the temperature in the reaction kettle 7 to 190 ℃, and preserving the temperature for 70 minutes to obtain the degradable polypropylene plastic;
step five, forming: extruding the degradable polypropylene plastic obtained in the step four through a double-screw extruder to form plastic particles.
In this embodiment, the starch is preferably a modified corn starch.
In this embodiment, the talc powder is preferably 800 mesh.
The working principle and the using process of the invention are as follows:
production facility of degradable polypropylene plastics is in the practicality, in throwing in each raw and other materials mixing box 2, start first servo motor 33, first servo motor 33 passes through the shaft coupling and drives mixing shaft 31 and rotate, it is rotatory to have driven mixing arm 32, be convenient for carry out the intensive mixing to each raw and other materials in the mixing box 2, start delivery pump 41, absorb the conveying pipeline 42 through the raw and other materials that conveying pump 41 mixes in with mixing box 2 in, thereby flow into in the heating tank 8, start heater 10 heats heating tank 8, start second servo motor 113, second servo motor 113 drives (mixing) shaft 111 through the shaft coupling and rotates, thereby driven stirring rake 112 to revolve the form and carry out the intensive mixing to the raw and other materials after the heating.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A production facility of degradable polypropylene plastics, includes bottom plate (1), its characterized in that: the mixing box is characterized in that a mixing box (2) is fixedly mounted on the upper surface of the base plate (1), a mixing mechanism (3) is arranged in the mixing box (2), the mixing mechanism (3) is mounted on the surface of the mixing box (2) through a bearing, a material conveying mechanism (4) is arranged on one side of the mixing box (2), the material conveying mechanism (4) is fixedly mounted on the upper surface of the base plate (1), a first discharging pipe (5) is fixedly mounted below the mixing box (2), the first discharging pipe (5) is connected with the material conveying mechanism (4), a mounting frame (6) is arranged on one side of the material conveying mechanism (4), a reaction kettle (7) is fixedly mounted on the mounting frame (6), a heating tank (8) is arranged in the reaction kettle (7), an installation cavity (9) is arranged on the inner side of the reaction kettle (7) and on the outer side of the reaction kettle (7), be equipped with heater (10) in installation cavity (9), be equipped with rabbling mechanism (11) in heating jar (8), install first sealed lid (12) on the upper surface of heating jar (8), rabbling mechanism (11) are installed on first sealed lid (12), the below of heating jar (8) is equipped with second discharging pipe (13), fixed mounting has feeder hopper (16) on first sealed lid (12).
2. The production equipment of degradable polypropylene plastic according to claim 1, wherein: mixing mechanism (3) are including mixing axle (31), hybrid rod (32) and first servo motor (33), mix axle (31) and rotate through the bearing and install on the internal surface of mixing box (2), hybrid rod (32) fixed mounting be in on mixing axle (31), first servo motor (33) pass through the shaft coupling with mixing axle (31) transmission is connected, first servo motor (33) fixed mounting be in on mixing box (2).
3. The production equipment of degradable polypropylene plastic according to claim 1, wherein: the upper hinge of mixing box (2) has case lid (14), be equipped with visual window (15) on the upper surface of mixing box (2).
4. The production equipment of degradable polypropylene plastic according to claim 1, wherein: defeated material mechanism (4) are including defeated material pump (41) and conveying pipeline (42), the feed inlet of defeated material pump (41) with first discharging pipe (5) are connected, install defeated material pump (41) on the upper surface of bottom plate (1), the one end of conveying pipeline (42) with the discharge gate of defeated material pump (41) is connected, install the other end of conveying pipeline (42) on feeder hopper (16).
5. The production equipment of degradable polypropylene plastic according to claim 1, wherein: rabbling mechanism (11) include (mixing) shaft (111), stirring rake (112) and second servo motor (113), stirring shaft (111) are rotated through the bearing and are installed on the lower surface of first sealed lid (12), stirring rake (112) fixed mounting be in on the (mixing) shaft (111), second servo motor (113) pass through the shaft coupling with (mixing) shaft (111) transmission is connected, second servo motor (113) fixed mounting be in on the upper surface of first sealed lid (12).
6. The production equipment of degradable polypropylene plastic according to claim 5, wherein: the stirring paddle (112) is provided with a plurality of, a plurality of all be equipped with a plurality of equidistant circulation hole (17) on the surface of stirring paddle (112).
7. The production equipment of degradable polypropylene plastic according to claim 1, wherein: and a control valve (18) is fixedly arranged on the second discharge pipe (13).
8. A preparation method of degradable polypropylene plastic is characterized by comprising the following steps: the preparation method of the degradable polypropylene plastic specifically comprises the following steps:
step one, preparing raw materials: taking 40-52 parts of polypropylene, 20-22 parts of starch, 6-9 parts of lignin fiber, 2.5-3.5 parts of coupling agent, 4-6 parts of methyl silicone oil and 6-8 parts of talcum powder according to the mass parts;
step two, mixing primary materials: respectively putting polypropylene, starch, lignin fiber and talcum powder into a mixing box (2) for full mixing, and conveying the mixture into a reaction kettle (7) through a conveying mechanism (4);
step three, heating and stirring: heating to 70-85 ℃ by a heater (10), increasing the temperature in the reaction kettle (7), starting a stirring mechanism (11) to stir and heat for 10-15 minutes to obtain a mixture;
step four, mixing secondary materials: adding the coupling agent and the methyl silicone oil into the reaction kettle (7) to be mixed with the mixture, stirring for 40-50 minutes, heating the temperature in the reaction kettle (7) to 190 ℃ at 180 ℃, and preserving the heat for 50-70 minutes to obtain the degradable polypropylene plastic;
step five, forming: extruding the degradable polypropylene plastic obtained in the step four through a double-screw extruder to form plastic particles.
9. The method for preparing degradable polypropylene plastic according to claim 8, wherein the method comprises the following steps: the starch is modified corn starch.
10. The method for preparing degradable polypropylene plastic according to claim 8, wherein the method comprises the following steps: the specification of the talcum powder is 500-800 meshes.
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| CN202110187332.5A CN113021673A (en) | 2021-02-18 | 2021-02-18 | Production equipment and preparation method of degradable polypropylene plastic |
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| CN202110187332.5A CN113021673A (en) | 2021-02-18 | 2021-02-18 | Production equipment and preparation method of degradable polypropylene plastic |
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| CN113403705A (en) * | 2021-07-09 | 2021-09-17 | 江苏柯能新材料有限公司 | Skin-core composite polyester thermal fuse device and process thereof |
| CN115536940A (en) * | 2022-10-25 | 2022-12-30 | 湖南安福环保科技股份有限公司 | Recycling production process of waste polypropylene plastic |
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