CN112140609A - Production method of antibacterial plastic - Google Patents
Production method of antibacterial plastic Download PDFInfo
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- CN112140609A CN112140609A CN202010672184.1A CN202010672184A CN112140609A CN 112140609 A CN112140609 A CN 112140609A CN 202010672184 A CN202010672184 A CN 202010672184A CN 112140609 A CN112140609 A CN 112140609A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0003—Producing profiled members, e.g. beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0011—Biocides
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Abstract
The invention discloses a production method of antibacterial plastic, which comprises the following steps: selecting plastic raw materials → heating preparation → mixing antibacterial master batches → heating melting → parison processing → blow molding → finished product processing → finished product inspection → packaging and warehousing; the invention realizes auxiliary processing or surface modification and processing on the plastic by using a mechanical processing mode, ensures that the antibacterial plastic can better meet the requirements of customers, avoids the generation of waste materials and stockings, and realizes targeted manufacturing on the basis of the antibacterial property of the plastic; ensuring that the plastic meets the national plastic physical and mechanical property standard and the national plastic environment safety and sanitation standard while ensuring the plastic to be antibacterial; the problem of uneven filling inside plastic caused by particle agglomeration during co-melting and working after antibacterial mother particles are added in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of production methods of antibacterial plastics, in particular to a production method of antibacterial plastics.
Background
The plastic is a high molecular compound which is polymerized by addition polymerization or polycondensation reaction by taking a monomer as a raw material, has moderate deformation resistance and is between fibers and rubber, and consists of synthetic resin, fillers, plasticizers, stabilizers, lubricants, pigments and other additives; the main component of the plastic is resin, and the resin refers to a high molecular compound which is not mixed with various additives; the plastic has the advantages of good impact resistance, light weight, good insulating property, good wear resistance and good transparency, the plastic can be divided into thermosetting plastic and thermoplastic plastic, the thermosetting plastic cannot be remodeled for use, and the thermoplastic plastic can be repeatedly produced, so the thermoplastic plastic has wider application range compared with the thermosetting plastic, but because the plastic is easy to cause bacteria accumulation in the using process, the attention of people to the physical health is increased along with the rapid development of economy and the improvement of culture level, the attention of people to the plastic which is the most frequently contacted substance in daily life is increased day by day, the plastic threatens the physical health of people after accumulating the bacteria, and the antibacterial plastic is suitable for transportation along with the market demand.
Along with the wide application of the antibacterial plastic, the antibacterial plastic is widely applied to a plurality of fields such as household appliances, food packages, cultural goods, kitchen and bathroom goods, automobile accessories and the like, and the antibacterial plastic is the antibacterial material which is the fastest in development and the most widely applied according to the development conditions of antibacterial materials at home and abroad; chinese patent publication No. CN102336331A discloses a preparation process of antibacterial plastic, which comprises the following steps: uniformly mixing the antibacterial agent, a proper amount of plastic particles and an auxiliary agent, and extruding and granulating to obtain high-concentration antibacterial master batch; mixing the antibacterial master batch with plastic resin; after mixing, performing injection molding or extrusion molding to obtain antibacterial plastic, wherein the antibacterial master batch is limited to be nano zinc oxide antibacterial particles, but the existing antibacterial plastic still has the phenomenon that the antibacterial master batch is agglomerated after being added, so that the filling uniformity of the antibacterial master batch is influenced; the single attention is paid to the antibacterial performance, the attention to the physical and mechanical properties of the processed plastic is low after the antibacterial master batch is added, and the properties of the produced plastic cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a production method of antibacterial plastic, which can solve the problem that the existing antibacterial plastic finished product can not meet the requirements of customers; the plastic is singly emphasized to resist bacteria, and the other physical and mechanical properties of the plastic cannot be ensured; the integral production of the antibacterial plastic is realized through processing, detecting and integral forming, and the comprehensiveness of the integral performance of the plastic is ensured; the problem of particle agglomeration after the antibacterial master batch is added is solved by utilizing the specific dispersibility of the silver.
In order to achieve the purpose, the invention provides the following technical scheme: a production method of antibacterial plastic comprises the following steps:
1) selecting plastic raw materials: selecting various blends of thermoplastic plastics, such as thermoplastic plastics such as polyethylene, polyvinyl fluoride, polyethylene terephthalate and the like, thermoplastic engineering plastics such as polycarbonate and the like, polymers such as thermoplastic elastomers and the like, wherein the plastic forms can be powder, granules and dispersoids;
2) heating preparation, namely preparing the thermoplastic plastics selected in the step 1 according to a plastic product to be manufactured or a customer requirement according to a proper proportion to prepare a plastic raw material, and adding the prepared plastic raw material into a processing machine, wherein the processing machine selects any one of an extruder and an injection, and the heating preparation is finished;
3) mixing the antibacterial master batch, selecting the antibacterial master batch with the effective component of 12-15% of the plastic product, and adding the antibacterial master batch into the plastic raw material to be heated in the step 2, wherein the antibacterial master batch is selected to have a long-acting antibacterial effect;
4) heating and melting, namely mechanically heating the plastic raw material added with the antibacterial master batch, determining a mechanically heated temperature value according to different used raw materials, melting the plastic raw material after heating to a preset temperature value, melting the antibacterial master batch and the plastic raw material together, filling the antibacterial master batch into the plastic raw material, and heating and melting to finish;
5) processing the parison, namely extruding the melt heated and melted in the step 4 into a storage cylinder until the melt in the storage cylinder meets the use requirement, then extruding the parison through a head die, placing the parison with the specified length into a blow molding die, and cutting the parison through a cutting edge on the die to obtain the parison which meets the blow molding operation;
6) blow molding, namely introducing compressed air into the blow mold with the parison poured in the step 5 through an air inlet on the mold, blowing up the parison in the mold, keeping the pressure of a plastic molding cavity part in the mold at a fixed value, waiting for the blow molded plastic product to be cooled and shaped, opening the mold, and taking out the plastic product to obtain a molded plastic product; if the plastic product needs to be processed into a finished product, processing preparation is carried out, and if the finished product does not have the processing requirement, sampling is carried out, and finished product detection is carried out;
7) processing a finished product, namely if the molded plastic product obtained in the step 6 does not meet the requirements of customers or the standard of the product, performing one or more of machining, joint processing and surface decoration on the molded plastic product obtained in the step 6 according to the requirements of customers or the technological requirements of the product, and manufacturing a plastic finished product meeting the requirements;
8) and (3) inspecting the finished product, namely inspecting the conventional physical and mechanical properties of the sampled finished product, wherein the conventional physical and mechanical properties comprise but are not limited to melt flow rate, tensile strength, tensile modulus, elongation at break and the like, the inspection is performed according to the national relevant plastic test standards and product standards, and the finished antibacterial plastic product is required to meet the national plastic sanitation safety regulations.
9) And (5) packaging and warehousing, namely packaging the plastic finished products qualified through the step 8, taking the plastic finished products into a warehouse and waiting for acceptance by customers.
The antibacterial master batch is a silver antibacterial master batch; the silver antibacterial master batch is prepared by forming an antibacterial master batch raw material from a silver-containing co-compatible composition, kneading and reacting the antibacterial master batch raw material at 150 +/-60 ℃ for forming, taking out the forming raw material after the thermal forming raw material is cooled to a proper temperature, crushing the thermal forming raw material by using a crushing crusher, mixing the crushed raw material with polyethylene resin according to a certain proportion, heating the mixture to a certain temperature by using an extruder, carrying out melt co-extrusion through a machine head, cooling the extruded co-molten material by one of cooling modes such as liquid cooling, surface cooling, circulating cooling or external cooling, and carrying out grain cutting by using a grain cutting machine after the co-molten material is cooled to a proper temperature to obtain the silver antibacterial master batch.
The blow molding adopts an intermittent extrusion blowing method, machines required in the blow molding process include but are not limited to an extruder, an extruder head, a blow mold, a mold closing device, a blowing device, a pressure regulating device and a cooling device, and the intermittent blow molding is suitable for manufacturing hollow container products with the volume of 1-10000ml, including but not limited to large-volume products such as various chemical reagent barrels, daily containers such as various milk bottles and the like, and industrial products such as various storage tanks and the like.
The mechanical processing in the finished product processing is a molding auxiliary process, namely a mechanical technician is used for manufacturing a plastic product with accurate size or meeting the technological requirements, the prop used in the mechanical processing is suitable for the characteristics of the current plastic product, and the problems of plastic melting, plastic adhesion to a cutter and the like are solved in the plastic processing process; the machining method includes, but is not limited to, laser cutting, drilling, polishing, thread machining, and existing machining methods such as shearing, punching, lathing, planing, and drilling.
The joint processing in the finished product processing is plastic combination processing, namely, plastic pieces are combined and processed by welding or standing and the like to form a complete plastic finished product; welding bonding methods include, but are not limited to, stick hot air welding, hot plate fusion welding, and ultrasonic welding; adhesive bonding methods include, but are not limited to, flux bonding and hot melt adhesive bonding; the surface modification in the finished product processing is plastic surface treatment, namely, burrs and sizes of the surface of a plastic product are corrected according to the requirements of customers or the requirements of the finished product; performing coating or coloring treatment on the surface of the plastic product; carrying out surface treatment such as hot stamping on the surface of the finished plastic.
Compared with the prior art, the invention has the following beneficial effects:
1. the production method of the antibacterial plastic ensures that the plastic production can meet the requirements of customers, ensures the antibacterial property of the plastic, ensures that the national plastic physical and mechanical property standard and the national plastic environment safety and sanitation standard are met, and provides a durable and antibacterial plastic product for users.
2. The production method of the antibacterial plastic disclosed by the invention has the advantages that the plastic is subjected to auxiliary processing or surface modification and processing by using a machining mode, the antibacterial plastic can be ensured to be more suitable for customer requirements, the generation of waste materials and stockings is avoided, and the targeted manufacturing is realized on the basis of the antibacterial property of the plastic.
3. According to the production method of the antibacterial plastic, the silver antibacterial master batch is used for forming actual nontoxic grade antibacterial addition, and the monomer silver antibacterial master batch does not have the phenomenon of agglomerated particles when being co-melted with the plastic, so that the problem of unstable antibacterial performance caused by uneven filling inside the plastic due to the phenomenon of agglomerated particles during co-melting manufacturing after the antibacterial master batch is added in the prior art is solved.
Drawings
FIG. 1 is a flow chart of the production method of the antibacterial plastic of the invention.
FIG. 2 is a flow chart of the production of the antibacterial masterbatch of the present invention.
FIG. 3 is a schematic view of the mechanical processing of the antibacterial plastic of the present invention.
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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A production method of antibacterial plastic comprises the following steps:
1) selecting plastic raw materials: selecting various blends of thermoplastic plastics, such as thermoplastic plastics such as polyethylene, polyvinyl fluoride, polyethylene terephthalate and the like, thermoplastic engineering plastics such as polycarbonate and the like, polymers such as thermoplastic elastomers and the like, wherein the plastic forms can be powder, granules and dispersoids;
2) heating preparation, namely preparing the thermoplastic plastics selected in the step 1 according to a plastic product to be manufactured or a customer requirement according to a proper proportion to prepare a plastic raw material, and adding the prepared plastic raw material into a processing machine, wherein the processing machine selects any one of an extruder and an injection, and the heating preparation is finished;
3) mixing the antibacterial master batch, selecting the antibacterial master batch with the effective component of 12-15% of the plastic product, and adding the antibacterial master batch into the plastic raw material to be heated in the step 2, wherein the antibacterial master batch is selected to have a long-acting antibacterial effect;
4) heating and melting, namely mechanically heating the plastic raw material added with the antibacterial master batch, determining a mechanically heated temperature value according to different used raw materials, melting the plastic raw material after heating to a preset temperature value, melting the antibacterial master batch and the plastic raw material together, filling the antibacterial master batch into the plastic raw material, and heating and melting to finish;
5) processing the parison, namely extruding the melt heated and melted in the step 4 into a storage cylinder until the melt in the storage cylinder meets the use requirement, then extruding the parison through a head die, placing the parison with the specified length into a blow molding die, and cutting the parison through a cutting edge on the die to obtain the parison which meets the blow molding operation;
6) blow molding, namely introducing compressed air into the blow mold with the parison poured in the step 5 through an air inlet on the mold, blowing up the parison in the mold, keeping the pressure of a plastic molding cavity part in the mold at a fixed value, waiting for the blow molded plastic product to be cooled and shaped, opening the mold, and taking out the plastic product to obtain a molded plastic product; if the plastic product needs to be processed into a finished product, processing preparation is carried out, and if the finished product does not have the processing requirement, sampling is carried out, and finished product detection is carried out;
7) processing a finished product, namely if the molded plastic product obtained in the step 6 does not meet the requirements of customers or the standard of the product, performing one or more of machining, joint processing and surface decoration on the molded plastic product obtained in the step 6 according to the requirements of customers or the technological requirements of the product, and manufacturing a plastic finished product meeting the requirements;
8) and (3) inspecting the finished product, namely inspecting the conventional physical and mechanical properties of the sampled finished product, wherein the conventional physical and mechanical properties comprise but are not limited to melt flow rate, tensile strength, tensile modulus, elongation at break and the like, the inspection is performed according to the national relevant plastic test standards and product standards, and the finished antibacterial plastic product is required to meet the national plastic sanitation safety regulations.
9) And (5) packaging and warehousing, namely packaging the plastic finished products qualified through the step 8, taking the plastic finished products into a warehouse and waiting for acceptance by customers.
The antibacterial master batch is a silver antibacterial master batch; the silver antibacterial master batch is prepared by forming an antibacterial master batch raw material from a silver-containing co-compatible composition, kneading and reacting the antibacterial master batch raw material at 150 +/-60 ℃ for forming, taking out the forming raw material after the thermal forming raw material is cooled to a proper temperature, crushing the thermal forming raw material by using a crushing crusher, mixing the crushed raw material with polyethylene resin according to a certain proportion, heating the mixture to a certain temperature by using an extruder, carrying out melt co-extrusion through a machine head, cooling the extruded co-molten material by one of cooling modes such as liquid cooling, surface cooling, circulating cooling or external cooling, and carrying out grain cutting by using a grain cutting machine after the co-molten material is cooled to a proper temperature to obtain the silver antibacterial master batch.
The blow molding adopts an intermittent extrusion blowing method, machines required in the blow molding process include but are not limited to an extruder, an extruder head, a blow mold, a mold closing device, a blowing device, a pressure regulating device and a cooling device, and the intermittent blow molding is suitable for manufacturing hollow container products with the volume of 1-10000ml, including but not limited to large-volume products such as various chemical reagent barrels, daily containers such as various milk bottles and the like, and industrial products such as various storage tanks and the like.
The mechanical processing in the finished product processing is a molding auxiliary process, namely a mechanical technician is used for manufacturing a plastic product with accurate size or meeting the technological requirements, the prop used in the mechanical processing is suitable for the characteristics of the current plastic product, and the problems of plastic melting, plastic adhesion to a cutter and the like are solved in the plastic processing process; the machining method includes, but is not limited to, laser cutting, drilling, polishing, thread machining, and existing machining methods such as shearing, punching, lathing, planing, and drilling.
The joint processing in the finished product processing is plastic combination processing, namely, plastic pieces are combined and processed by welding or standing and the like to form a complete plastic finished product; welding bonding methods include, but are not limited to, stick hot air welding, hot plate fusion welding, and ultrasonic welding; adhesive bonding methods include, but are not limited to, flux bonding and hot melt adhesive bonding; the surface modification in the finished product processing is plastic surface treatment, namely, burrs and sizes of the surface of a plastic product are corrected according to the requirements of customers or the requirements of the finished product; performing coating or coloring treatment on the surface of the plastic product; carrying out surface treatment such as hot stamping on the surface of the finished plastic.
All parts used in the application document are standard parts, the specific connection mode of all parts adopts conventional means such as mature bolts, welding and the like in the prior art, machinery, parts and electrical equipment adopt conventional models in the prior art, circuit connection adopts the conventional connection mode in the prior art, and detailed description is not given here.
The production method of the antibacterial plastic, which is related by the invention, realizes stable antibacterial plastic production by combining the silver antibacterial master batch with the thermoplastic plastic; antibacterial plastics meeting the requirements of customers are produced for users by utilizing a linking process, so that the overall safety and the standard of the device are improved; the whole performance of the device is combined for debugging production, and stable and efficient production experience is brought to a user.
In summary, the following steps: according to the production method of the antibacterial plastic, the silver-containing compatible composition is introduced to prepare the silver antibacterial master batch, and the generation of particle aggregation phenomenon in a co-melting state is avoided by utilizing the molecular diffusion level of silver, so that the antibacterial master batch can be uniformly mixed in the plastic raw material, and the safe, nontoxic, efficient and long-antibacterial-time antibacterial plastic is brought to a user; the use requirements of customers are met through the processing structure, the standard plastic production is formed by combining the existing national plastic physical and mechanical regulations and the national plastic safety regulations, the problem that the antibacterial property is singly emphasized and the influence on the self characteristics of the plastic is generated after the antibacterial master batch is neglected to be added into the plastic material in the prior art is avoided
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 (5)
1. The production method of the antibacterial plastic is characterized by comprising the following steps:
1) selecting plastic raw materials: selecting various blends of thermoplastic plastics, such as thermoplastic plastics such as polyethylene, polyvinyl fluoride, polyethylene terephthalate and the like, thermoplastic engineering plastics such as polycarbonate and the like, polymers such as thermoplastic elastomers and the like, wherein the plastic forms can be powder, granules and dispersoids;
2) heating preparation, namely preparing the thermoplastic plastics selected in the step 1 according to a plastic product to be manufactured or a customer requirement according to a proper proportion to prepare a plastic raw material, and adding the prepared plastic raw material into a processing machine, wherein the processing machine selects any one of an extruder and an injection, and the heating preparation is finished;
3) mixing the antibacterial master batch, selecting the antibacterial master batch with the effective component of 12-15% of the plastic product, and adding the antibacterial master batch into the plastic raw material to be heated in the step 2, wherein the antibacterial master batch is selected to have a long-acting antibacterial effect;
4) heating and melting, namely mechanically heating the plastic raw material added with the antibacterial master batch, determining a mechanically heated temperature value according to different used raw materials, melting the plastic raw material after heating to a preset temperature value, melting the antibacterial master batch and the plastic raw material together, filling the antibacterial master batch into the plastic raw material, and heating and melting to finish;
5) processing the parison, namely extruding the melt heated and melted in the step 4 into a storage cylinder until the melt in the storage cylinder meets the use requirement, then extruding the parison through a head die, placing the parison with the specified length into a blow molding die, and cutting the parison through a cutting edge on the die to obtain the parison which meets the blow molding operation;
6) blow molding, namely introducing compressed air into the blow mold with the parison poured in the step 5 through an air inlet on the mold, blowing up the parison in the mold, keeping the pressure of a plastic molding cavity part in the mold at a fixed value, waiting for the blow molded plastic product to be cooled and shaped, opening the mold, and taking out the plastic product to obtain a molded plastic product; if the plastic product needs to be processed into a finished product, processing preparation is carried out, and if the finished product does not have the processing requirement, sampling is carried out, and finished product detection is carried out;
7) processing a finished product, namely if the molded plastic product obtained in the step 6 does not meet the requirements of customers or the standard of the product, performing one or more of machining, joint processing and surface decoration on the molded plastic product obtained in the step 6 according to the requirements of customers or the technological requirements of the product, and manufacturing a plastic finished product meeting the requirements;
8) and (3) inspecting the finished product, namely inspecting the conventional physical and mechanical properties of the sampled finished product, wherein the conventional physical and mechanical properties comprise but are not limited to melt flow rate, tensile strength, tensile modulus, elongation at break and the like, the inspection is performed according to the national relevant plastic test standards and product standards, and the finished antibacterial plastic product is required to meet the national plastic sanitation safety regulations.
9) And (5) packaging and warehousing, namely packaging the plastic finished products qualified through the step 8, taking the plastic finished products into a warehouse and waiting for acceptance by customers.
2. The method for producing an antibacterial plastic according to claim 1, wherein: the antibacterial master batch is a silver antibacterial master batch; the silver antibacterial master batch is prepared by forming an antibacterial master batch raw material from a silver-containing co-compatible composition, kneading and reacting the antibacterial master batch raw material at 150 +/-60 ℃ for forming, taking out the forming raw material after the thermal forming raw material is cooled to a proper temperature, crushing the thermal forming raw material by using a crushing crusher, mixing the crushed raw material with polyethylene resin according to a certain proportion, heating the mixture to a certain temperature by using an extruder, carrying out melt co-extrusion through a machine head, cooling the extruded co-molten material by one of cooling modes such as liquid cooling, surface cooling, circulating cooling or external cooling, and carrying out grain cutting by using a grain cutting machine after the co-molten material is cooled to a proper temperature to obtain the silver antibacterial master batch.
3. The method for producing an antibacterial plastic according to claim 1, wherein: the blow molding adopts an intermittent extrusion blowing method, machines required in the blow molding process include but are not limited to an extruder, an extruder head, a blow mold, a mold closing device, a blowing device, a pressure regulating device and a cooling device, and the intermittent blow molding is suitable for manufacturing hollow container products with the volume of 1-10000ml, including but not limited to large-volume products such as various chemical reagent barrels, daily containers such as various milk bottles and the like, and industrial products such as various storage tanks and the like.
4. The method for producing an antibacterial plastic according to claim 1, wherein: the mechanical processing in the finished product processing is a molding auxiliary process, namely a mechanical technician is used for manufacturing a plastic product with accurate size or meeting the technological requirements, the prop used in the mechanical processing is suitable for the characteristics of the current plastic product, and the problems of plastic melting, plastic adhesion to a cutter and the like are solved in the plastic processing process; the machining method includes, but is not limited to, laser cutting, drilling, polishing, thread machining, and existing machining methods such as shearing, punching, lathing, planing, and drilling.
5. The method for producing an antibacterial plastic according to claim 1, wherein: the joint processing in the finished product processing is plastic combination processing, namely, plastic pieces are combined and processed by welding or standing and the like to form a complete plastic finished product; welding bonding methods include, but are not limited to, stick hot air welding, hot plate fusion welding, and ultrasonic welding; adhesive bonding methods include, but are not limited to, flux bonding and hot melt adhesive bonding; the surface modification in the finished product processing is plastic surface treatment, namely, burrs and sizes of the surface of a plastic product are corrected according to the requirements of customers or the requirements of the finished product; performing coating or coloring treatment on the surface of the plastic product; carrying out surface treatment such as hot stamping on the surface of the finished plastic.
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