A PE drainage pipe containing a natural antibacterial agent and its manufacturing method

Abstract

The present invention relates to the technical field of drainage pipes, and discloses a PE drainage pipe containing a natural antibacterial agent and a manufacturing method thereof. This PE drainage pipe is prepared by mixing components such as polyethylene, a natural functional antibacterial agent, and a fiber additive component, and then subjecting the mixture to melt extrusion and shaping. The natural functional antibacterial agent is polybutadiene grafted with the natural antibacterial agent thymol in its structure, which can not only improve the toughness of the drainage pipe but also endow the drainage pipe with excellent long-term antibacterial performance. By modifying the surface of quartz fibers with hyperbranched polymer molecular chains, the prepared fiber additive component can be intertwined with the polyethylene molecular chains during the subsequent melting process, enabling the quartz fibers to effectively exert their own strengthening effect, improving the mechanical strength of the drainage pipe, and enabling it to adapt to more complex application environments.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipes, and in particular to a PE drainage pipe containing a natural antibacterial agent and a manufacturing method thereof. Background Art

[0002] Polyethylene (PE for short) is a high-performance plastic material that has been widely used in the field of drainage pipe manufacturing because of its unique properties such as wear resistance, high temperature resistance, light weight and easy installation.

[0003] Although PE drainage pipes have many advantages, there are still some areas that need to be improved in practical applications. Among them, antibacterial performance is an important aspect, because the sewage in the drainage system is contaminated by bacteria, which will not only affect the water quality safety, but also may cause harm to the environment and human health. In addition, the growth and reproduction of bacteria in the pipe will produce a large amount of biofilm and dirt. These substances will adhere to the inner wall of the pipe, affecting the drainage capacity and service life of the pipe. Through antibacterial modification, the growth and reproduction of bacteria in the pipe can be effectively reduced, thereby reducing the formation of biofilm and dirt and extending the service life of the pipe. Polyethylene itself does not have good antibacterial properties, which makes it impossible to avoid the above problems. In addition, the mechanical strength of polyethylene drainage pipes is gradually unable to meet the increasingly harsh use environment. Therefore, functional improvements such as antibacterial properties of polyethylene are of great significance for its application in the field of drainage pipe manufacturing.

[0004] At present, it is common to improve the antibacterial properties of polyethylene by adding antibacterial agents. Generally, silver or organic antibacterial agents are used as additives. However, silver is a heavy metal. Once it falls off from the drain pipe, it may cause harm to the environment. Small molecule organic antibacterial agents have the problem of easy precipitation. Not only can the long-term antibacterial effect not be guaranteed, but it is also easy to cause pollution. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology, the object of the present invention is to provide a PE drainage pipe containing a natural antibacterial agent and a manufacturing method thereof.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A method for manufacturing a PE drainage pipe containing a natural antibacterial agent, wherein the PE drainage pipe comprises the following raw materials measured in parts by weight:

[0008] High density polyethylene 75-83 parts;

[0009] 5-9 parts of natural functional antibacterial agent;

[0010] 3-4.5 parts of fiber added ingredients;

[0011] 0.5-1.5 parts of antioxidant;

[0012] 1-2.5 parts of lubricant;

[0013] 2-4 parts of heat stabilizer;

[0014] 6-10 parts of inorganic filler;

[0015] The manufacturing method comprises the following steps:

[0016] The first step is to weigh each raw material according to the weight portion for use;

[0017] Step 2: Add high-density polyethylene, natural functional antibacterial agent, fiber additive, antioxidant, lubricant, heat stabilizer and inorganic filler into the mixer, control the mixing temperature to 100-120°C, stir at a rate of 500-1000r / min, stir for 20-40min to form a mixture;

[0018] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 60-80°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 180-200°C, and extrude and shape it to obtain a PE drainage pipe.

[0019] As a further embodiment of the present invention, the preparation method of the natural functional antibacterial agent comprises the following steps:

[0020] Step S1, polybutadiene, 3-isocyanate propylene and toluene solvent are mixed, the temperature is controlled to 40-50° C., after stirring and mixing, the temperature is increased to 80-100° C., and an initiator is added to the formed mixed solution, after keeping the temperature for 4-8 hours, the heating is stopped, and the functionalized polybutadiene is formed through precipitation, filtration, washing and vacuum drying processes;

[0021] Step S2, functionalized polybutadiene and N,N-dimethylformamide solvent are mixed, stirred evenly, and then thymol and a catalyst are added. After the addition is completed, the temperature is raised to 70-80° C., and the mixture is stirred for 3-6 hours at the same temperature, and then the temperature is lowered and the material is discharged to obtain a natural functional antibacterial agent.

[0022] As a further embodiment of the present invention, in step S1, the initiator is selected from benzoyl peroxide or dicumyl peroxide.

[0023] As a further embodiment of the present invention, in step S2, the catalyst is selected from dibutyltin dilaurate or stannous octoate.

[0024] In the above technical scheme, firstly, under the action of a peroxide initiator, polybutadiene and 3-isocyanate propylene can undergo a free radical polymerization reaction, thereby introducing an active isocyanate substituent into the polybutadiene molecular chain, and then, under the action of a catalyst, the isocyanate substituent can react with the hydroxyl substituent in the thymol structure to produce an amine esterification reaction, thereby introducing the natural antibacterial agent thymol into the polybutadiene molecular chain to prepare a natural functional antibacterial agent.

[0025] As a further embodiment of the present invention, the method for preparing the fiber additive component comprises the following steps:

[0026] Step SS1, using a silane coupling agent to perform surface modification on quartz fiber to obtain modified quartz fiber;

[0027] Step SS2, adding the modified quartz fiber to the 1,4-dioxane solvent, ultrasonically dispersing for 20-30 minutes, adding the bridging agent to the formed dispersion, after the addition, keeping warm at 60-70°C for 2-4 hours, lowering the temperature to 40-50°C, continuing to add 1,4,5,8-naphthalenetetracarboxylic acid and phase transfer catalyst, after the addition, raising the temperature to 90-100°C, keeping warm and stirring for 8-12 hours, stopping heating, separating the solid material, and obtaining the fiber addition component.

[0028] As a further embodiment of the present invention, in step SS1, the silane coupling agent is selected from 3-glycidyloxypropyltrimethoxysilane or 3-glycidyloxypropyltriethoxysilane.

[0029] As a further embodiment of the present invention, in step SS2, the bridging agent is selected from 2-[2-(2-aminoethoxy)ethoxy]ethanol or 1,8-diamino-3,6-dioxaoctane.

[0030] As a further embodiment of the present invention, in step SS2, the phase transfer catalyst is p-toluenesulfonic acid.

[0031] In the above technical scheme, the surface of quartz fiber is first modified by using a glycidyl silane coupling agent to obtain epoxy-modified quartz fiber, and then the epoxy group is used as the active initiation site, and under the action of a phase transfer catalyst, the bridging agent and the 1,4,5,8-naphthalenetetracarboxylic acid structure are initiated to undergo in-situ branched polymerization on the surface of the quartz fiber to obtain quartz fiber with a surface modified with a branched macromolecular chain, i.e., a fiber additive.

[0032] As a further embodiment of the present invention, the antioxidant is selected from antioxidant 168 or antioxidant 1010; the lubricant is paraffin, polyethylene wax or calcium stearate; the heat stabilizer is calcium zinc stabilizer; and the inorganic filler is selected from talc, calcium carbonate, fumed silica or titanium dioxide.

[0033] A PE drainage pipe containing a natural antibacterial agent is produced by adopting the above-mentioned manufacturing method.

[0034] Beneficial effects of the present invention:

[0035] (1) The natural functional antimicrobial agent prepared by the present invention is polybutadiene with the natural antimicrobial agent thymol grafted into its structure. Since polybutadiene and polyethylene have good compatibility, the natural functional antimicrobial agent can exist in the polyethylene matrix for a long time, and the broad-spectrum antimicrobial effect of thymol is utilized to endow the drainage pipe with excellent long-term antimicrobial performance. Moreover, since the natural functional antimicrobial agent structure contains highly active isocyanate groups that do not participate in the reaction, it can be used as a compatibilizer to improve the compatibility between polyethylene and other auxiliary materials. In addition, polybutadiene has a certain toughening effect, which can improve the toughness of the PE drainage pipe.

[0036] (2) The present invention modifies the surface of quartz fiber with hyperbranched polymer molecular chains and utilizes the special structure of the hyperbranched molecular chains to intertwine with polyethylene molecular chains during the subsequent melting process, so that the quartz fiber is firmly embedded in the polymer molecular chains to form a strong "mortise and tenon" structure. This structure can greatly improve the interfacial bonding between the quartz fiber and polyethylene, so that the quartz fiber can effectively exert its own reinforcement effect, improve the mechanical strength of the drainage pipe, and enable it to adapt to more complex application environments.

[0037] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0039] Figure 1 The scanning electron microscope images of quartz fiber and fiber additives, where (1) is quartz fiber and (2) is fiber additives. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0041] Preparation Example 1

[0042] Preparation of natural functional antibacterial agents:

[0043] Step S1, 10g of polybutadiene, 1.5g of 3-isocyanate propylene and toluene solvent are mixed, the temperature is controlled to 40°C, and after stirring and mixing, the temperature is increased to 100°C, and 0.1g of benzoyl peroxide is added to the formed mixed solution, and after keeping the temperature for 8h, the heating is stopped, and the functionalized polybutadiene is formed through precipitation, filtration, washing and vacuum drying processes;

[0044] 0.3 g of functionalized polybutadiene was taken as the test object, and the percentage content of isocyanate groups in the functionalized polybutadiene structure was tested by hydrochloric acid-di-n-butylamine titration test method. The test result was 7.014%.

[0045] Step S2, 3.5 g of functionalized polybutadiene is mixed with N,N-dimethylformamide solvent, and after stirring evenly, 0.4 g of thymol and 0.1 g of dibutyltin dilaurate are added. After the addition is completed, the temperature is raised to 75° C., and after stirring for 4 hours, the temperature is lowered and the material is discharged to obtain a natural functional antibacterial agent.

[0046] The same mass of natural functional antibacterial agent was taken, and the isocyanate group percentage content was tested using the same titration experimental method as step S1. The test result was 1.251%. Therefore, the natural functional antibacterial agent is a polybutadiene containing both thymol and active isocyanate groups in its structure, and can act as a compatibilizer.

[0047] Preparation Example 2

[0048] Preparation of fiber added ingredients:

[0049] Step SS1, dispersing 2.4 g of quartz fiber in an ethanol aqueous solution with a volume fraction of 70%, then adding 3.8 g of 3-glycidyloxypropyltriethoxysilane to the formed dispersion, then raising the temperature to 70° C., and stirring while keeping warm to obtain modified quartz fiber;

[0050] Step SS2, add 1.8g of modified quartz fiber to 1,4-dioxane solvent, ultrasonically disperse for 30 minutes, then add 3g of 1,8-diamino-3,6-dioxaoctane to the formed dispersion, after the addition is completed, keep warm at 65°C for 3h, then lower the temperature to 45°C, continue to add 6.5g of 1,4,5,8-naphthalenetetracarboxylic acid and 0.2g of p-toluenesulfonic acid, after the addition is completed, raise the temperature to 100°C, keep warm and stir for 9h, stop heating, separate the solid material, and the fiber added component can be obtained.

[0051] Figure 1The scanning electron microscope images of quartz fiber and fiber additives, where (1) is quartz fiber and (2) is fiber additives. It can be observed that the surface of quartz fiber is smooth without obvious traces of organic coating, while the surface of fiber additives presents a special uneven morphology and has a micro three-dimensional structure. Therefore, it can be inserted into the polyethylene matrix, forming a "mortise and tenon" structure between the quartz fiber and the polyethylene matrix, thereby improving the interface bonding between them. Example 1

[0052] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0053] High density polyethylene 75 parts;

[0054] 5 parts of natural functional antibacterial agent;

[0055] 3 servings of fiber added ingredients;

[0056] Antioxidant 168 0.5 parts;

[0057] 1 part of polyethylene wax;

[0058] Calcium zinc stabilizer 2 parts;

[0059] 6 parts of talcum powder;

[0060] The manufacturing method comprises the following steps:

[0061] The first step is to weigh each raw material according to the weight portion for use;

[0062] Step 2: Add high-density polyethylene, natural functional antibacterial agent, fiber additive, antioxidant 168, polyethylene wax, calcium zinc stabilizer and talcum powder into a mixer, control the mixing temperature to 100°C, the stirring rate to 500r / min, and stir for 40 minutes to form a mixture;

[0063] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 60°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 180°C, and extrude and shape it to obtain a PE drainage pipe.

[0064] The natural functional antibacterial agent is the natural functional antibacterial agent prepared in Preparation Example 1; the fiber additive component is the fiber additive component prepared in Preparation Example 2, and the rest are the same. Example 2

[0065] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0066] 80 parts of high density polyethylene;

[0067] 5 parts of natural functional antibacterial agent;

[0068] 4 servings of fiber added ingredients;

[0069] 1 part of antioxidant 1010;

[0070] Calcium stearate 2 parts;

[0071] 3 parts of calcium zinc stabilizer;

[0072] 8 parts of calcium carbonate;

[0073] The manufacturing method comprises the following steps:

[0074] The first step is to weigh each raw material according to the weight portion for use;

[0075] Step 2: Add high-density polyethylene, natural functional antibacterial agent, fiber additive, antioxidant 1010, calcium stearate, calcium zinc stabilizer and calcium carbonate into a mixer, control the mixing temperature to 110°C, stir at a rate of 800r / min, and stir for 30 minutes to form a mixture;

[0076] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 70°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 190°C, and extrude and shape it to obtain a PE drainage pipe. Example 3

[0077] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0078] 83 parts of high density polyethylene;

[0079] 9 parts of natural functional antibacterial agent;

[0080] 4.5 parts of fiber added ingredients;

[0081] 1.5 parts of antioxidant 1010;

[0082] Calcium stearate 2.5 parts;

[0083] Calcium zinc stabilizer 4 parts;

[0084] Titanium dioxide 10 parts;

[0085] The manufacturing method comprises the following steps:

[0086] The first step is to weigh each raw material according to the weight portion for use;

[0087] Step 2: Add high-density polyethylene, natural functional antibacterial agent, fiber additive, antioxidant 1010, calcium stearate, calcium zinc stabilizer, and titanium dioxide into a mixer, control the mixing temperature to 120°C, the stirring rate to 1000r / min, and stir for 20 minutes to form a mixture;

[0088] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 80°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 200°C, and extrude and shape it to obtain a PE drainage pipe.

[0089] Comparative Example 1

[0090] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0091] 80 parts of high density polyethylene;

[0092] 5 parts of thymol;

[0093] 4 servings of fiber added ingredients;

[0094] 1 part of antioxidant 1010;

[0095] Calcium stearate 2 parts;

[0096] 3 parts of calcium zinc stabilizer;

[0097] 8 parts of calcium carbonate;

[0098] The manufacturing method comprises the following steps:

[0099] The first step is to weigh each raw material according to the weight portion for use;

[0100] Step 2: Add high-density polyethylene, thymol, fiber additives, antioxidant 1010, calcium stearate, calcium zinc stabilizer, and calcium carbonate into a mixer, control the mixing temperature to 110° C., and the stirring rate to 800 r / min. After stirring for 30 minutes, a mixture is formed;

[0101] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 70°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 190°C, and extrude and shape it to obtain a PE drainage pipe.

[0102] Comparative Example 2

[0103] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0104] 80 parts of high density polyethylene;

[0105] 4 servings of fiber added ingredients;

[0106] 1 part of antioxidant 1010;

[0107] Calcium stearate 2 parts;

[0108] 3 parts of calcium zinc stabilizer;

[0109] 8 parts of calcium carbonate;

[0110] The manufacturing method comprises the following steps:

[0111] The first step is to weigh each raw material according to the weight portion for use;

[0112] Step 2: Add high-density polyethylene, fiber additives, antioxidant 1010, calcium stearate, calcium zinc stabilizer, and calcium carbonate into a mixer, control the mixing temperature to 110°C, and the stirring rate to 800r / min. After stirring for 30 minutes, a mixture is formed.

[0113] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 70°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 190°C, and extrude and shape it to obtain a PE drainage pipe.

[0114] Comparative Example 3

[0115] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0116] 80 parts of high density polyethylene;

[0117] 5 parts of natural functional antibacterial agent;

[0118] 4 parts of quartz fiber;

[0119] 1 part of antioxidant 1010;

[0120] Calcium stearate 2 parts;

[0121] 3 parts of calcium zinc stabilizer;

[0122] 8 parts of calcium carbonate;

[0123] The manufacturing method comprises the following steps:

[0124] The first step is to weigh each raw material according to the weight portion for use;

[0125] Step 2: Add high-density polyethylene, natural functional antibacterial agent, quartz fiber, antioxidant 1010, calcium stearate, calcium zinc stabilizer and calcium carbonate into a mixer, control the mixing temperature to 110°C, the stirring rate to 800r / min, and stir for 30 minutes to form a mixture;

[0126] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 70°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 190°C, and extrude and shape it to obtain a PE drainage pipe.

[0127] Comparative Example 4

[0128] A PE drainage pipe containing a natural antibacterial agent, comprising the following raw materials measured in parts by weight:

[0129] 80 parts of high density polyethylene;

[0130] 5 parts of natural functional antibacterial agent;

[0131] 1 part of antioxidant 1010;

[0132] Calcium stearate 2 parts;

[0133] 3 parts of calcium zinc stabilizer;

[0134] 8 parts of calcium carbonate;

[0135] The manufacturing method comprises the following steps:

[0136] The first step is to weigh each raw material according to the weight portion for use;

[0137] Step 2: Add high-density polyethylene, natural functional antibacterial agent, antioxidant 1010, calcium stearate, calcium zinc stabilizer and calcium carbonate into the mixer, control the mixing temperature to 110°C, the stirring rate to 800r / min, and stir for 30 minutes to form a mixture;

[0138] The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 70°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 190°C, and extrude and shape it to obtain a PE drainage pipe.

[0139] Test Case

[0140] Various performance tests were performed on the PE drainage pipes in the embodiments and comparative examples, and the results are recorded in Table 1:

[0141] Table 1 - Test results

[0142]

[0143] Note: The tensile strength test reference standard is GB / T 1040.3-2006; the impact strength test reference standard is GB / T14152-2001; the antibacterial rate test reference standard is QB / T 2591-2003, the test bacteria species is Staphylococcus aureus, and the test time is 2 months after the sample is placed at room temperature.

[0144] From the analysis of the test results, it can be seen that the use of the natural functional antibacterial agent in Preparation Example 1 and the fiber added component in Preparation Example 2 as additives can make the prepared drainage pipe exhibit good strength, toughness and antibacterial properties, and can meet the application requirements of different environments.

[0145] After the natural functional antimicrobial agent was replaced with thymol, the antimicrobial performance of the drain pipe was significantly reduced, probably due to volatilization and migration during long-term storage, resulting in a lower content of thymol in the drain pipe. In addition, the toughness of the drain pipe also decreased to a certain extent due to the loss of the toughening effect of polybutadiene. After the natural functional antimicrobial agent was directly removed, the antimicrobial performance of the drain pipe was further reduced.

[0146] After replacing the fiber additives with quartz fibers without surface modification, the quartz fibers could not effectively exert their advantages due to interface problems, so the reinforcement effect on polyethylene was poor, resulting in a decrease in the strength of the drainage pipe. After directly removing the fiber additives, the mechanical strength of the drainage pipe was further reduced.

[0147] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

[0148] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a PE drainage pipe containing a natural antibacterial agent, characterized in that: The PE drainage pipe comprises the following raw materials measured by weight: High density polyethylene 75-83 parts; 5-9 parts of natural functional antibacterial agent; 3-4.5 parts of fiber added ingredients; 0.5-1.5 parts of antioxidant; 1-2.5 parts of lubricant; 2-4 parts of heat stabilizer; 6-10 parts of inorganic filler; The manufacturing method comprises the following steps: The first step is to weigh each raw material according to the weight portion for use; Step 2: Add high-density polyethylene, natural functional antibacterial agent, fiber additive, antioxidant, lubricant, heat stabilizer and inorganic filler into the mixer, control the mixing temperature to 100-120°C, stir at a rate of 500-1000r / min, stir for 20-40min to form a mixture; The third step is to feed the mixed material into a kneading machine for kneading, set the temperature to 60-80°C, then feed the formed material into a twin-screw extruder, control the extrusion temperature to 180-200°C, and extrude and shape it to obtain a PE drainage pipe; The preparation method of the natural functional antibacterial agent comprises the following steps: Step S1, polybutadiene, 3-isocyanate propylene and toluene solvent are mixed, the temperature is controlled to 40-50° C., after stirring and mixing, the temperature is increased to 80-100° C., and an initiator is added to the formed mixed solution, after keeping the temperature for 4-8 hours, the heating is stopped, and the functionalized polybutadiene is formed through precipitation, filtration, washing and vacuum drying processes; Step S2, mixing the functionalized polybutadiene with the N,N-dimethylformamide solvent, stirring evenly, then adding thymol and the catalyst, raising the temperature to 70-80° C., keeping the temperature and stirring for 3-6 hours, cooling and discharging the material, and thus obtaining a natural functional antibacterial agent; The preparation method of the fiber addition component comprises the following steps: Step SS1, using a silane coupling agent to perform surface modification on quartz fiber to obtain modified quartz fiber; Step SS2, adding the modified quartz fiber to the 1,4-dioxane solvent, ultrasonically dispersing for 20-30 minutes, adding the bridging agent to the formed dispersion, after the addition is completed, keeping warm at 60-70°C for 2-4 hours, lowering the temperature to 40-50°C, and continuing to add 1,4,5,8-naphthalenetetracarboxylic acid and a phase transfer catalyst. After the addition is completed, the temperature is increased to 90-100°C, and the stirring is continued for 8-12 hours, and then the heating is stopped, and the solid material is separated to obtain the fiber addition component.

2. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: In step S1, the initiator is selected from benzoyl peroxide or dicumyl peroxide.

3. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: In step S2, the catalyst is selected from dibutyltin dilaurate or stannous octoate.

4. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: In step SS1, the silane coupling agent is selected from 3-glycidyloxypropyltrimethoxysilane or 3-glycidyloxypropyltriethoxysilane.

5. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: In step SS2, the bridging agent is selected from 2-[2-(2-aminoethoxy)ethoxy]ethanol or 1,8-diamino-3,6-dioxaoctane.

6. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: In step SS2, the phase transfer catalyst is p-toluenesulfonic acid.

7. The method for manufacturing a PE drainage pipe containing a natural antibacterial agent according to claim 1, characterized in that: The antioxidant is selected from antioxidant 168 or antioxidant 1010; the lubricant is paraffin, polyethylene wax or calcium stearate; the heat stabilizer is calcium zinc stabilizer; the inorganic filler is selected from talc, calcium carbonate, fumed silica or titanium dioxide.

8. A PE drainage pipe containing a natural antibacterial agent, characterized in that: The method is prepared by the manufacturing method according to any one of claims 1 to 7.

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