Formula and manufacturing process of environment-friendly electric appliance injection molding part

Abstract

The environment-friendly electric appliance injection molding part formula comprises the following components in parts by weight: 40 to 60 parts of polylactic acid, 10 to 20 parts of bamboo fiber, 5 to 15 parts of nano calcium carbonate, 3 to 8 parts of a plasticizer, 0.5 to 2 parts of an antioxidant, 2 to 6 parts of a compatilizer and 0.5 to 2 parts of a hindered amine light stabilizer. The invention has the following beneficial effects: polylactic acid is adopted as a main raw material, polylactic acid has good biodegradability, and added bamboo fiber also belongs to a natural environment-friendly material, so pollution to the environment is greatly reduced; bamboo fibers and nano calcium carbonate are added, so that the mechanical property of the injection molded part is effectively enhanced, and the injection molded part can meet the requirements of the electric appliance injection molded part on the aspects of structural support, function realization and the like; through reasonable selection of a plasticizer, a compatilizer and other assistants and optimization of manufacturing process parameters, the processing performance of the material is improved, and the injection molding efficiency and the product quality are improved; the raw materials are wide in source, and the production cost is reduced while the performance is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical appliance injection molding parts, and in particular relates to a formula and a manufacturing process for an environmentally friendly electrical appliance injection molding part. Background Art

[0002] Electrical injection molded parts are key components of various electrical products, and play an irreplaceable role in the structural support, function realization, and appearance shaping of electrical appliances. They usually use high molecular polymers as the main raw materials. After heating and melting, they are injected into a specific mold cavity under the pressure of an injection molding machine, and cooled and solidified to form parts with specific shapes, sizes and performances. With the increasing requirements for environmental protection and the continuous increase in demand for product performance, the development of electrical injection molded parts that are environmentally friendly, have good mechanical properties and high processing efficiency has become an important direction for the development of the industry.

[0003] Patent publication number CN110564148B discloses an injection-molding-grade nylon engineering plastic for household appliance housings and a preparation method. The patent discloses that the nylon engineering plastic is prepared by grinding bismuth sol, flaky inorganic powder, and fluorinated carboxylic acid into a slurry, spray drying, and high-temperature calcination to form a modified filler, which is finally mixed with nylon 6 and nylon 66 composite resin, plasticizer, ABS resin, and processing aids, and then melt-extruded and granulated. Through a complex modified filler preparation process and specific raw material mixing and extrusion steps, a high-flowability injection-molding-grade nylon engineering plastic for household appliance housings is obtained. However, this solution mainly focuses on improving the material's fluidity and does not fully consider the material's degradability, making it difficult to meet the current urgent demand for environmentally friendly materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a formula and a production process for environmentally friendly electrical appliance injection molding parts, achieving a balance between material degradability, mechanical properties and processing efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a formula for environmentally friendly electrical injection molding parts, comprising the following components, by weight: 40-60 parts of polylactic acid, 10-20 parts of bamboo fiber, 5-15 parts of nano-calcium carbonate, 3-8 parts of plasticizer, 0.5-2 parts of antioxidant, 2-6 parts of compatibilizer, and 0.5-2 parts of hindered amine light stabilizer.

[0006] As a preferred technical solution of the present invention, the plasticizer is one of tributyl citrate, acetyl tributyl citrate, and dioctyl phthalate.

[0007] As a preferred technical solution of the present invention, the antioxidant is one of 2,6-di-tert-butyl-p-cresol, dilauryl thiodipropionate, and tris(2,4-di-tert-butylphenyl) phosphite.

[0008] As a preferred technical solution of the present invention, the compatibilizer is one of maleic anhydride grafted polypropylene and ethylene-butyl acrylate-glycidyl methacrylate copolymer.

[0009] The present invention also discloses a process for manufacturing an environmentally friendly electrical appliance injection molded part, comprising the following steps:

[0010] Raw material pretreatment: Soak the bamboo fiber in sodium hydroxide solution, then take it out and rinse it with clean water until it is neutral, and dry it for later use; dry the nano calcium carbonate at 100-120℃ for 2-3h;

[0011] Mixing: Add polylactic acid, pretreated bamboo fiber, dried nano calcium carbonate, plasticizer, antioxidant, compatibilizer and hindered amine light stabilizer into a high-speed mixer;

[0012] Melt extrusion: The mixed materials are put into a twin-screw extruder for melt extrusion. The temperature of the first zone of the twin-screw extruder is set to 160-180°C, the temperature of the second zone is set to 180-200°C, the temperature of the third zone is set to 200-220°C, the temperature of the fourth zone is set to 220-240°C, and the temperature of the fifth zone is set to 230-250°C. The screw speed is 200-300r / min. After extrusion, it is water-cooled and pelletized;

[0013] Injection molding: The obtained pellets are put into an injection molding machine for injection molding.

[0014] As a preferred technical solution of the present invention, the bamboo fiber is immersed in a sodium hydroxide solution with a mass fraction of 5-10% for 1-2 hours, and then taken out and rinsed with clean water until it becomes neutral.

[0015] As a preferred technical solution of the present invention, in the mixing step, the mixing temperature is 80-100° C. and the mixing time is 10-20 minutes.

[0016] As a preferred technical solution of the present invention, in the injection molding step, the barrel temperature of the injection molding machine is set to 180-220°C, the mold temperature is set to 40-60°C, the injection pressure is 80-120MPa, the holding pressure is 40-60MPa, the holding time is 10-20s, and the cooling time is 15-30s.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses polylactic acid as the main raw material, which has good biodegradability. At the same time, the added bamboo fiber is also a natural and environmentally friendly material, which greatly reduces pollution to the environment.

[0019] The addition of bamboo fiber and nano-calcium carbonate effectively enhances the mechanical properties of injection molded parts, enabling them to meet the requirements of electrical injection molded parts in terms of structural support and functional realization;

[0020] By rationally selecting additives such as plasticizers and compatibilizers and optimizing production process parameters, the processing performance of the material is improved, and the efficiency of injection molding and product quality are improved;

[0021] Raw materials are widely available, and natural materials such as bamboo fiber are relatively low in cost, which reduces production costs while ensuring performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a process flow chart for manufacturing the environmentally friendly electrical appliance injection molded parts of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1, which is the first embodiment of the present invention, provides a formula for environmentally friendly electrical appliance injection molding parts, comprising the following components by weight: 40 parts of polylactic acid, 10 parts of bamboo fiber, 5 parts of nano-calcium carbonate, 3 parts of plasticizer, 0.5 parts of antioxidant, 2 parts of compatibilizer, and 0.5 parts of hindered amine light stabilizer; the plasticizer is tributyl citrate; the antioxidant is 2,6-di-tert-butyl-p-cresol; the compatibilizer is maleic anhydride grafted polypropylene; polylactic acid is a biodegradable thermoplastic polyester made from renewable resources such as corn and cassava, providing basic mechanical properties and degradability for injection molding parts; bamboo fiber has the characteristics of high strength and high modulus, which can enhance the mechanical properties of injection molding parts. At the same time, it is widely available and is a natural and environmentally friendly material; nano-calcium carbonate can improve the processing performance of the material and enhance the dimensional stability and surface finish of the product; the plasticizer is used to lower the glass transition temperature of polylactic acid, Improve the flexibility and processing properties of the material; antioxidants prevent polylactic acid from oxidative degradation during processing and use, extending the service life of the product; compatibilizers improve the compatibility between polylactic acid and bamboo fiber, and enhance the comprehensive performance of the composite material; hindered amine light stabilizers (HALS) are a new type of high-efficiency stabilizer that appeared in the mid-1970s. They are used for anti-aging of polymer materials such as plastics and rubber. Their light stabilization effect is more outstanding, and they have good compatibility with many resins. They are currently the fastest-growing type of stabilizer; hindered amine light stabilizers (HALS) are a class of organic amine compounds with steric hindrance effects. Because they have the ability to decompose hydroperoxides, quench excited oxygen, capture free radicals, and the effective groups have recyclable functions, the light stabilization efficiency of HALS is very high, making it the largest type of light stabilizer used in plastic products at home and abroad.

[0026] A process for producing environmentally friendly electrical appliance injection molded parts comprises the following steps:

[0027] Raw material pretreatment: Soak the bamboo fiber in a 5% sodium hydroxide solution for 2 hours, then rinse with clean water until neutral, and dry for later use; dry the nano-calcium carbonate at 100°C for 3 hours;

[0028] Mixing: Add polylactic acid, pretreated bamboo fiber, dried nano calcium carbonate, plasticizer, antioxidant, compatibilizer and hindered amine light stabilizer into a high-speed mixer at a mixing temperature of 80°C for 20 minutes;

[0029] Melt extrusion: The mixed materials are put into a twin-screw extruder for melt extrusion. The temperature of the first zone of the twin-screw extruder is set to 160°C, the temperature of the second zone is set to 180°C, the temperature of the third zone is set to 200°C, the temperature of the fourth zone is set to 220°C, the temperature of the fifth zone is set to 230°C, the screw speed is 200r / min, and the extruder is water-cooled and pelletized after extrusion;

[0030] Injection molding: The obtained pellets were put into an injection molding machine for injection molding. The barrel temperature of the injection molding machine was set to 180°C, the mold temperature was set to 40°C, the injection pressure was 80 MPa, the holding pressure was 40 MPa, the holding time was 10 s, and the cooling time was 15 s.

[0031] Example 2

[0032] See also Figure 1 , which is the second embodiment of the present invention, provides a formula for an environmentally friendly electrical injection molded part, comprising the following components in parts by weight: 50 parts of polylactic acid, 15 parts of bamboo fiber, 10 parts of nano calcium carbonate, 5 parts of plasticizer, 1.2 parts of antioxidant, 4 parts of compatibilizer, and 1.2 parts of hindered amine light stabilizer; the plasticizer is acetyl tributyl citrate; the antioxidant is dilauryl thiodipropionate; the compatibilizer is ethylene-butyl acrylate-glycidyl methacrylate copolymer; polylactic acid is a biodegradable thermoplastic polyester made from renewable resources such as corn and cassava, which provides basic mechanical properties and degradability for injection molded parts; bamboo fiber has the characteristics of high strength and high modulus, which can enhance the mechanical properties of injection molded parts. At the same time, it is widely available and is a natural and environmentally friendly material; nano calcium carbonate can improve the processing performance of the material, improve the dimensional stability and surface finish of the product; the plasticizer is used to reduce the glassiness of polylactic acid Glass transition temperature, improve the flexibility and processing performance of the material; antioxidants prevent polylactic acid from oxidative degradation during processing and use, extending the service life of the product; compatibilizers improve the compatibility between polylactic acid and bamboo fiber, and enhance the comprehensive performance of the composite material; hindered amine light stabilizers (HALS) are a new type of high-efficiency stabilizer that appeared in the mid-1970s. They are used for anti-aging of polymer materials such as plastics and rubber. Their light stabilization effect is more outstanding, and they have good compatibility with many resins. They are currently the fastest-growing type of stabilizer; hindered amine light stabilizers (HALS) are a type of organic amine compound with steric hindrance effect. Because they have the ability to decompose hydroperoxides, quench excited oxygen, capture free radicals, and the effective groups have recyclable functions, the light stabilization efficiency of HALS is very high, making it the largest type of light stabilizer used in plastic products at home and abroad.

[0033] The preparation method of ethylene-butyl acrylate-glycidyl methacrylate copolymer is as follows:

[0034] Raw material preparation

[0035] Ethylene: High-purity ethylene gas, as a basic monomer, is generally required to have a purity of more than 99% to reduce the impact of impurities on the polymerization reaction;

[0036] Butyl acrylate: Chemically pure grade, ensuring that the butyl acrylate content meets the standards, avoiding the increase of reaction by-products or incomplete reaction due to impurities;

[0037] Glycidyl methacrylate: analytically pure, ensuring its quality to accurately participate in the polymerization reaction and provide the required epoxy groups in the copolymer;

[0038] Initiator: commonly used organic peroxide initiators, such as dibenzoyl peroxide (BPO) or azobisisobutyronitrile (AIBN);

[0039] Solvent: Aromatic hydrocarbon solvents such as toluene and xylene are selected. They have good solubility for monomers and initiators and are chemically stable at the polymerization temperature. Their function is to dissolve monomers and initiators, mix the reaction system evenly, and help control the reaction temperature.

[0040] Reaction equipment

[0041] Polymerization reactor: A high-pressure reactor with a stirring device is used. The material is usually stainless steel with good pressure resistance and corrosion resistance. The reactor must be equipped with a precise temperature control system to control the reaction temperature within the set value range. At the same time, a reliable pressure monitoring and regulation device is required to ensure that the reaction is carried out under the required pressure conditions.

[0042] Gas introduction and metering device: used to accurately control the amount and rate of ethylene gas introduced; generally a mass flow meter is used to measure the flow of ethylene to ensure the stability and accuracy of the gas flow;

[0043] Stirring device: The design of the stirring blade should ensure that the reaction system is mixed evenly under high pressure and high speed stirring conditions;

[0044] Reaction steps

[0045] Prepare the reaction system: Add butyl acrylate, glycidyl methacrylate, and solvent to a polymerization reactor and start stirring to mix thoroughly. Then, seal the reactor and replace the air with nitrogen to remove impurities such as oxygen and prevent them from negatively affecting the polymerization reaction.

[0046] Adding initiator: While stirring, slowly add the initiator pre-dissolved in a small amount of solvent to the reaction system; be careful to control the speed when adding the initiator to prevent excessive reaction due to excessive local initiator concentration;

[0047] Ethylene introduction and reaction start-up: Slowly introduce ethylene gas into the reactor through the gas introduction device, and gradually increase the reaction temperature to the predetermined reaction temperature. During the temperature increase process, continuously stir the reaction system to ensure that all components are fully mixed. As ethylene is introduced, the reaction pressure gradually increases. When the reaction temperature and pressure reach the set values, maintain these conditions to carry out the polymerization reaction. During the reaction process, the changes in the reaction temperature and pressure must be closely monitored. If any abnormal fluctuations occur, timely take appropriate measures to adjust them.

[0048] Reaction termination and product treatment: After the reaction is completed, stop introducing ethylene gas and cool the reactor to room temperature; then slowly release the pressure in the reactor, open the reactor, and transfer the reaction product to a separatory funnel; first wash the product with an appropriate amount of dilute hydrochloric acid solution to remove unreacted initiator and possible alkaline impurities, and then wash it multiple times with deionized water until the washing solution is neutral; transfer the washed product to a rotary evaporator to remove the solvent to obtain crude ethylene-butyl acrylate-glycidyl methacrylate copolymer; to further improve the purity of the product, a precipitation method can be used for purification: dissolve the crude product in an appropriate amount of tetrahydrofuran, and then slowly add it dropwise to a large amount of methanol to precipitate the copolymer, filter and collect the precipitate, and dry it in a vacuum drying oven to constant weight to obtain a pure ethylene-butyl acrylate-glycidyl methacrylate copolymer product.

[0049] A process for producing environmentally friendly electrical appliance injection molded parts comprises the following steps:

[0050] Raw material pretreatment: Soak the bamboo fiber in 8% sodium hydroxide solution by mass for 1.5 hours, then take it out and rinse it with clean water until it is neutral, and dry it for later use; dry the nano calcium carbonate at 110℃ for 2.5 hours;

[0051] Mixing: Add polylactic acid, pretreated bamboo fiber, dried nano calcium carbonate, plasticizer, antioxidant, compatibilizer and hindered amine light stabilizer into a high-speed mixer at a mixing temperature of 90°C for 15 minutes;

[0052] Melt extrusion: The mixed materials are put into a twin-screw extruder for melt extrusion. The temperature of the first zone of the twin-screw extruder is set to 170°C, the temperature of the second zone is set to 190°C, the temperature of the third zone is set to 210°C, the temperature of the fourth zone is set to 230°C, the temperature of the fifth zone is set to 240°C, the screw speed is 250r / min, and the extruder is water-cooled and pelletized after extrusion;

[0053] Injection molding: The obtained pellets were put into an injection molding machine for injection molding. The barrel temperature of the injection molding machine was set to 200°C, the mold temperature was set to 50°C, the injection pressure was 100 MPa, the holding pressure was 50 MPa, the holding time was 15 s, and the cooling time was 22 s.

[0054] Example 3

[0055] See also Figure 1 , which is the third embodiment of the present invention, provides a formula for environmentally friendly electrical injection molding parts, which includes the following components in parts by weight: 60 parts of polylactic acid, 20 parts of bamboo fiber, 15 parts of nano-calcium carbonate, 8 parts of plasticizer, 2 parts of antioxidant, 6 parts of compatibilizer, and 2 parts of hindered amine light stabilizer; the plasticizer is dioctyl phthalate; the antioxidant is tris(2,4-di-tert-butylphenyl) phosphite; the compatibilizer is maleic anhydride grafted polypropylene; polylactic acid is a biodegradable thermoplastic polyester made from renewable resources such as corn and cassava, which provides basic mechanical properties and degradability for injection molding parts; bamboo fiber has the characteristics of high strength and high modulus, which can enhance the mechanical properties of injection molding parts. At the same time, it is widely available and is a natural and environmentally friendly material; nano-calcium carbonate can improve the processing performance of the material, improve the dimensional stability and surface finish of the product; the plasticizer is used to lower the glass transition temperature of polylactic acid. degree, improving the flexibility and processing performance of the material; antioxidants prevent polylactic acid from oxidative degradation during processing and use, extending the service life of the product; compatibilizers improve the compatibility between polylactic acid and bamboo fiber, and enhance the comprehensive performance of the composite material; hindered amine light stabilizers (HALS) are a new type of high-efficiency stabilizer that appeared in the mid-1970s. They are used for anti-aging of polymer materials such as plastics and rubber. Their light stabilization effect is more outstanding, and they have good compatibility with many resins. They are currently the fastest-growing type of stabilizer; hindered amine light stabilizers (HALS) are a type of organic amine compound with steric hindrance effect. Because they have the ability to decompose hydroperoxides, quench excited oxygen, capture free radicals, and the effective groups have recyclable functions, the light stabilization efficiency of HALS is very high, making it the largest type of light stabilizer used in plastic products at home and abroad.

[0056] A process for producing environmentally friendly electrical appliance injection molded parts comprises the following steps:

[0057] Raw material pretreatment: Soak the bamboo fiber in a 10% sodium hydroxide solution for 1 hour, then take it out and rinse it with clean water until it is neutral, and dry it for later use; dry the nano calcium carbonate at 120℃ for 2 hours;

[0058] Mixing: Add polylactic acid, pretreated bamboo fiber, dried nano calcium carbonate, plasticizer, antioxidant, compatibilizer and hindered amine light stabilizer into a high-speed mixer at a mixing temperature of 100°C for 10 minutes;

[0059] Melt extrusion: The mixed materials are put into a twin-screw extruder for melt extrusion. The temperature of the first zone of the twin-screw extruder is set to 180°C, the temperature of the second zone is set to 200°C, the temperature of the third zone is set to 220°C, the temperature of the fourth zone is set to 240°C, the temperature of the fifth zone is set to 250°C, the screw speed is 300r / min, and the extruder is water-cooled and pelletized after extrusion;

[0060] Injection molding: The obtained pellets were put into an injection molding machine for injection molding. The barrel temperature of the injection molding machine was set to 220°C, the mold temperature was set to 60°C, the injection pressure was 120 MPa, the holding pressure was 60 MPa, the holding time was 20 s, and the cooling time was 30 s.

[0061] The following are supplementary comparative experimental data and charts to verify the performance differences between the environmentally friendly electrical appliance injection molding formula of the present invention and the background art patent CN110564148B:

[0062] 1. Experimental Design

[0063] Test samples

[0064] The present invention: take the formula of Example 2 (50 parts of polylactic acid + 15 parts of bamboo fiber + 10 parts of nano-calcium carbonate + 5 parts of plasticizer + 1.2 parts of antioxidant + 4 parts of compatibilizer + 1.2 parts of hindered amine light stabilizer);

[0065] Comparative Example: prepared according to the formula of Example CN110564148B (nylon 6 / 66 composite resin + modified filler);

[0066] Test items

[0067] Environmental protection: biodegradation rate (180 days soil burial, ASTM D5338);

[0068] Mechanical properties: tensile strength (ISO 527), flexural modulus (ISO 178), notched impact strength (ISO 179);

[0069] Processing properties: melt flow rate (MFR, ISO 1133, 220℃ / 2.16kg);

[0070] Thermal stability: heat deflection temperature (HDT, ISO 75);

[0071] 2. Comparison of experimental results

[0072] Environmental protection (biodegradation rate)

[0073] Time (days) Degradation rate of the present invention (%) Comparative example degradation rate (%) 30 28.5 1.2 60 52.3 2.1 90 78.6 3.0 180 95.2 5.4

[0074] Conclusion: The degradation rate of the polylactic acid / bamboo fiber system of the present invention is greater than 95% within 180 days, while the nylon-based material of the comparative example is almost non-degradable.

[0075] Comparison of mechanical properties

[0076] Performance indicators The present invention Comparative Example Test standards Tensile strength (MPa) 58.3 62.1 ISO 527 Flexural modulus (GPa) 3.8 3.5 ISO 178 Notched impact strength (kJ / m²) 9.2 8.5 ISO 179

[0077] Conclusion: The synergistic reinforcement of bamboo fiber and nano-calcium carbonate makes the flexural modulus and notched impact strength better than the control, and the tensile strength is slightly lower, but meets the requirements of electrical devices.

[0078] Processing performance and thermal stability

[0079] parameter The present invention Comparative Example MFR (g / 10min) 25.4 32.7 Heat deformation temperature (℃) 125 155 Injection cycle (s) 40 38

[0080] Conclusion: The MFR of the present invention is moderate (25.4 g / 10min); the heat deformation temperature of 125°C can meet the operating environment of most electrical devices.

[0081] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A formula for environmentally friendly electrical appliance injection molding, characterized by: The invention comprises the following components by weight: 40-60 parts of polylactic acid, 10-20 parts of bamboo fiber, 5-15 parts of nano calcium carbonate, 3-8 parts of plasticizer, 0.5-2 parts of antioxidant, 2-6 parts of compatibilizer and 0.5-2 parts of hindered amine light stabilizer.

2. The environmentally friendly electrical appliance injection molding formula according to claim 1, characterized in that: The plasticizer is one of tributyl citrate, acetyl tributyl citrate and dioctyl phthalate.

3. The environmentally friendly electrical appliance injection molding formula according to claim 1, characterized in that: The antioxidant is one of 2,6-di-tert-butyl-p-cresol, dilauryl thiodipropionate, and tris(2,4-di-tert-butylphenyl) phosphite.

4. The environmentally friendly electrical appliance injection molding formula according to claim 1, characterized in that: The compatibilizer is one of maleic anhydride grafted polypropylene and ethylene-butyl acrylate-glycidyl methacrylate copolymer.

5. The process for producing an environmentally friendly electrical appliance injection molded part according to any one of claims 1 to 4, characterized in that: The steps include: Raw material pretreatment: Soak the bamboo fiber in sodium hydroxide solution, then take it out and rinse it with clean water until it is neutral, and dry it for later use; dry the nano calcium carbonate at 100-120℃ for 2-3h; Mixing: Add polylactic acid, pretreated bamboo fiber, dried nano calcium carbonate, plasticizer, antioxidant, compatibilizer and hindered amine light stabilizer into a high-speed mixer; Melt extrusion: The mixed materials are put into a twin-screw extruder for melt extrusion. The temperature of the first zone of the twin-screw extruder is set to 160-180°C, the temperature of the second zone is set to 180-200°C, the temperature of the third zone is set to 200-220°C, the temperature of the fourth zone is set to 220-240°C, and the temperature of the fifth zone is set to 230-250°C. The screw speed is 200-300r / min. After extrusion, it is water-cooled and pelletized; Injection molding: The obtained pellets are put into an injection molding machine for injection molding.

6. The process for producing an environmentally friendly electrical appliance injection molded part according to claim 5, characterized in that: Soak the bamboo fiber in a 5-10% by mass sodium hydroxide solution for 1-2 hours, then take it out and rinse it with clean water until it becomes neutral.

7. The process for producing an environmentally friendly electrical appliance injection molded part according to claim 5, characterized in that: In the mixing step, the mixing temperature is 80-100° C. and the mixing time is 10-20 minutes.

8. The process for producing an environmentally friendly electrical appliance injection molded part according to claim 5, characterized in that: In the injection molding step, the barrel temperature of the injection molding machine is set to 180-220° C., the mold temperature is set to 40-60° C., the injection pressure is 80-120 MPa, the holding pressure is 40-60 MPa, the holding time is 10-20 s, and the cooling time is 15-30 s.

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