Preparation optimization method of special antibacterial flame-retardant master batch for polypropylene

Abstract

The invention relates to the field of high polymer material processing, in particular to a preparation optimization method of special antibacterial flame-retardant master batch for polypropylene, which comprises the following steps: acquiring a polypropylene matrix set, an antibacterial agent set, a flame retardant set, a compatilizer set, an antibacterial range and a flame-retardant range, acquiring a standard test piece by using a test master batch set, performing an external force resistance test on the standard test piece, and obtaining the antibacterial flame-retardant master batch for the polypropylene. Performing an antibacterial effect test on a qualified test piece to obtain an antibacterial index and an updated test piece, performing a flame retardant capability test on the updated test piece to obtain a flame retardant index, and marking a test proportion group corresponding to a maximum performance value as a successful proportion group; and performing supplementary preparation operation on the polypropylene matrix set, the antibacterial agent set, the flame retardant set and the compatilizer set based on the success ratio group and the external force resistance index corresponding to the success ratio group to obtain a target master batch set, thereby completing preparation optimization of the antibacterial flame-retardant master batch. The overall performance of the antibacterial flame-retardant master batch can be improved, and the application effect of the antibacterial flame-retardant master batch is improved.

Description

Technical Field

[0001] The present invention relates to the field of polymer material processing, and in particular to a method for optimizing the preparation of antibacterial and flame-retardant masterbatches specifically for polypropylene. Background Art

[0002] Polypropylene is widely used in home furnishings, automobiles, and electronic appliances due to its excellent mechanical properties, chemical resistance, and processability. However, in certain applications, polypropylene must possess both excellent antibacterial and flame retardant properties to meet higher safety and hygiene requirements. Factories typically add antibacterial and flame retardant agents to a polypropylene matrix to create antibacterial and flame retardant masterbatches, which are then used in the production of downstream products, imparting both antibacterial and flame retardant properties to the polypropylene material.

[0003] At present, the selection of ingredients and proportions when preparing antibacterial flame retardant masterbatches often depends on the factory's production experience, maintaining a fixed ratio of antibacterial agents and flame retardants, thereby producing a batch of antibacterial flame retardant masterbatches with exactly the same performance.

[0004] Although existing production methods can complete the preparation of antibacterial and flame-retardant masterbatches, due to the large number of types of antibacterial agents and flame retardants on the market, and the addition of antibacterial agents and flame retardants will also affect the mechanical properties of the raw materials, there will be large differences in the overall performance of the masterbatch under different types and addition ratios. At the same time, the effects of the produced masterbatch when added to different products of different customers will also vary greatly. Therefore, there is an urgent need for a method that can accurately test and evaluate the overall performance of the masterbatch, so as to quickly and accurately screen the optimal ratio for specific antibacterial agents, specific flame retardants and specific customer needs, and prepare polypropylene-specific antibacterial and flame-retardant masterbatches with excellent comprehensive performance and reliable application effects. Summary of the Invention

[0005] The present invention provides a preparation optimization method for polypropylene special antibacterial flame retardant masterbatch, the main purpose of which is to improve the overall performance of the antibacterial flame retardant masterbatch and enhance the application effect of the antibacterial flame retardant masterbatch.

[0006] To achieve the above objectives, the present invention provides a method for optimizing the preparation of a polypropylene-specific antibacterial flame-retardant masterbatch, comprising:

[0007] Obtain polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range;

[0008] Confirm the masterbatch testing mechanism, where the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port;

[0009] The antibacterial range and the flame retardant range were tested and sampled evenly to obtain k test ratio groups;

[0010] For each of the k test proportion groups, perform the following operations:

[0011] Based on the test proportion group and the masterbatch test mechanism, a proportion preparation operation is performed on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set;

[0012] Performing an external force resistance test on the standard test piece to obtain an external force resistance index, comparing the external force resistance index with a preset resistance threshold, and marking the standard test piece as a qualified test piece if the external force resistance index is greater than the resistance threshold;

[0013] The qualified test pieces are aggregated to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces:

[0014] Perform antibacterial effect test on qualified test pieces to obtain antibacterial index and update test pieces, perform flame retardant ability test on updated test pieces to obtain flame retardant index;

[0015] Calculate the comprehensive performance value based on the external force resistance index, flame retardant index and antibacterial index corresponding to the qualified test piece;

[0016] Summarizing the comprehensive performance values ​​to obtain multiple comprehensive performance values, determining a maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and recording the test proportion group corresponding to the maximum performance value as the success proportion group;

[0017] Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set, completing the preparation optimization of the antibacterial and flame retardant masterbatch.

[0018] Optionally, the antibacterial range and the flame retardant range are tested and uniformly sampled to obtain k test ratio groups, including:

[0019] Performing a uniform sampling operation on the antibacterial range based on a preset first sampling interval to obtain p antibacterial ratios, and obtaining q flame retardant ratios based on a preset second sampling interval and flame retardant range;

[0020] Perform binary combinations on the p antibacterial ratios and the q flame retardant ratios to obtain k test ratio groups, wherein k=p×q, and each of the k test ratio groups includes: an antibacterial ratio and a flame retardant ratio.

[0021] Optionally, the method of performing a proportional preparation operation on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set based on the test proportion group and the masterbatch testing mechanism to obtain the test masterbatch set includes:

[0022] extracting a test polypropylene matrix from the polypropylene matrix set based on a preset test mass, and calculating the antibacterial mass based on the test mass and the antibacterial ratio in the test ratio group, wherein the antibacterial mass is the product of the test mass and the antibacterial ratio;

[0023] Test antimicrobials were extracted from the antimicrobial set based on their antimicrobial quality;

[0024] Get the tested flame retardant based on the tested mass, the flame retardant ratio in the tested ratio group, and the flame retardant set;

[0025] Obtain test compatibilizers based on test quality, preset addition ratio and compatibilizer set;

[0026] Using a mixer in a masterbatch testing mechanism, a test polypropylene matrix, a test compatibilizer, and a test flame retardant are mixed to obtain preliminary test raw materials;

[0027] The preliminary test raw materials were placed into the main feed port of the twin-screw extruder in the masterbatch test mechanism, and the test antimicrobial agent was placed into the side feed port of the twin-screw extruder to obtain a test extruder;

[0028] A test strip material is obtained by using a test extruder, and the test strip material is cooled and pelletized to obtain a test masterbatch set.

[0029] Optionally, obtaining a standard test specimen using the test masterbatch set includes:

[0030] Obtaining a test substrate set, confirming the mass of the masterbatch of the test masterbatch set, calculating the mass of the substrate according to the mass of the masterbatch and a preset masterbatch ratio, and extracting an additive substrate set from the test substrate set based on the mass of the substrate;

[0031] Using a mixer to perform a mixing operation on the added base material set and the test masterbatch set to obtain a preliminary mixed raw material;

[0032] Using an injection molding machine to perform injection molding on the preliminary mixed raw materials to obtain preliminary test specimens;

[0033] The preliminary test specimens are cured to obtain standard test specimens.

[0034] Optionally, performing an external force resistance test on the standard test piece to obtain an external force resistance index includes:

[0035] Obtain a tensile testing machine and an impact testing machine, wherein the tensile testing machine includes: a tensile rod, a test fixture and a tensile force sensor, and the impact testing machine includes: a pendulum and a support;

[0036] Identify the fixed test specimen based on the standard test specimen, the test fixture of the tensile testing machine, and the tensile rod of the tensile testing machine;

[0037] The fixed test piece is stretched using a stretching rod of a tensile testing machine, and the tensile force of the fixed test piece when the stretching rod of the tensile testing machine is stretched is monitored in real time using a tensile sensor until the fixed test piece breaks, and the tensile force monitored by the tensile sensor when the fixed test piece breaks is used as the maximum resistance tensile force;

[0038] Place the standard test specimen on the support of the impact testing machine to obtain a placed test specimen;

[0039] Confirm the surface to be impacted where the test piece is placed, and confirm the impact cross-sectional area of ​​the surface to be impacted;

[0040] Using a pre-built camera to obtain an initial test image of the surface to be impacted, performing a grayscale operation on the initial test image to obtain a test grayscale image, wherein the test grayscale image includes: a plurality of test pixel points;

[0041] The test grayscale mean is calculated using multiple test pixels. The calculation formula is as follows:

[0042]

[0043] in, To test the grayscale mean, Gret i is the grayscale value of the i-th test pixel in the multiple test pixels, and n is the number of test pixels in the multiple test pixels;

[0044] Use the pendulum of the impact testing machine to perform an impact test on the test specimen to obtain the deformation of the specimen and the impact absorption energy;

[0045] The deformation specimen is placed on the support of the impact testing machine to obtain an impact test piece;

[0046] Obtain the impact grayscale mean based on the camera and the impact test piece;

[0047] The external force resistance index is calculated based on the maximum tensile resistance, impact cross-sectional area, impact absorption energy, test grayscale average, and impact grayscale average. The calculation formula is as follows:

[0048]

[0049] Among them, σ F is the external force resistance index, F max is the maximum resistance to tension, E s To absorb the impact energy, S T is the impact cross-sectional area, is the impact grayscale mean, || refers to the absolute value.

[0050] Optionally, performing an antibacterial effect test on a qualified test piece to obtain an antibacterial index and update the test piece includes:

[0051] Performing a disinfection operation on the qualified test piece to obtain a disinfected test piece;

[0052] Obtain a bacterial dispersion, a sterile dropper, and a constant temperature and humidity test chamber, wherein the bacterial concentration of the bacterial dispersion is preset;

[0053] Extracting a target suspension from the bacterial dispersion using a preset extraction volume and a sterile dropper, and dropping the target suspension onto the surface of a sterilized test piece using a sterile dropper to obtain a bacteria-coated test piece;

[0054] The pre-constructed sterile polyethylene film is used to cover and laminate the bacteria-coated test piece to obtain a closed test piece;

[0055] Placing the sealed test piece in a constant temperature and humidity test chamber to obtain a cultured test piece, taking the time of obtaining the cultured test piece as the starting point and recording the time in real time to obtain the culture time, and confirming the end of the test piece based on the culture time, a preset culture time threshold, the constant temperature and humidity test chamber, and the cultured test piece;

[0056] The finished test piece is eluted with the pre-constructed sterile water to obtain the eluted bacterial solution and the updated test piece;

[0057] Perform plate count on the eluted bacterial solution to obtain the total number of bacterial cultures;

[0058] The antibacterial index is calculated based on the bacterial solution concentration, extraction volume, total bacterial culture number and culture time threshold. The calculation formula is as follows:

[0059]

[0060] Among them, σ p is the antibacterial index, c j is the bacterial solution concentration, V j is the extraction volume, t j is the cultivation time threshold, N z is the total number of bacterial cultures.

[0061] Optionally, performing a flame retardant capability test on the updated test piece to obtain a flame retardant index includes:

[0062] Obtain a flame test stand, and fix the updated test piece on the flame test stand to obtain a fixed test piece;

[0063] Perform a bottom ignition operation on the fixed test piece to obtain a burning test piece, record the time when the burning test piece is obtained, and obtain the initial time;

[0064] Use a pre-built metal basin to collect combustion waste from the combustion specimen until the combustion specimen is extinguished, obtain combustion drips, and record the time when the combustion specimen is extinguished to obtain the end time;

[0065] Weighing the burning drips to obtain the drip mass;

[0066] The flame retardant index is calculated based on the initial time, end time and dripping mass. The calculation formula is as follows:

[0067]

[0068] Among them, σ H is the flame retardant index, t end and t start are the end time and the initial time respectively, m H is the dripping mass.

[0069] Optionally, the calculation formula of the comprehensive performance value is as follows:

[0070]

[0071] Among them, ψ cx is the comprehensive performance value, e is the natural constant, and ln is the natural logarithm.

[0072] Optionally, the method of performing a supplementary preparation operation on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set based on the success ratio group and the external force resistance index corresponding to the success ratio group to obtain a target masterbatch set includes:

[0073] The updated compatibilizer ratio is calculated based on the external force resistance index and the addition ratio. The calculation formula is as follows:

[0074]

[0075] Among them, k x is to update the compatibilizer ratio, k0 is the addition ratio, σ0 is the preset reference resistance index, and tanh is the hyperbolic tangent function;

[0076] Obtain the production polypropylene matrix based on the preset production quality and polypropylene matrix set; obtain the production antibacterial agent based on the production quality, the antibacterial ratio in the success ratio group and the antibacterial agent set; obtain the production flame retardant based on the production quality, the flame retardant ratio in the success ratio group and the flame retardant set; obtain the production compatibilizer based on the production quality, the updated compatibilizer ratio and the compatibilizer set;

[0077] The target masterbatch set is obtained based on the mixer in the masterbatch testing institution, the twin-screw extruder in the masterbatch testing institution, the production of polypropylene matrix, the production of antibacterial agent, the production of flame retardant and the production of compatibilizer.

[0078] To achieve the above object, the present invention also provides a preparation optimization system for polypropylene special antibacterial flame retardant masterbatch, comprising:

[0079] The masterbatch material preparation module is used to obtain the polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range, and confirm the masterbatch testing mechanism. The masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine. The twin-screw extruder includes: a main feed port and a side feed port.

[0080] The test masterbatch preparation module is used to uniformly sample the antibacterial range and the flame retardant range for testing to obtain k test ratio groups. The following operations are performed on each of the k test ratio groups: based on the test ratio group and the masterbatch testing mechanism, a proportional preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set;

[0081] A product test piece testing module is used to perform an external force resistance test on a standard test piece to obtain an external force resistance index, compare the external force resistance index with a preset resistance threshold, and if the external force resistance index is greater than the resistance threshold, record the standard test piece as a qualified test piece, summarize the qualified test pieces to obtain multiple qualified test pieces, and perform the following operations on each of the multiple qualified test pieces: perform an antibacterial effect test on the qualified test piece to obtain an antibacterial index and update the test piece, perform a flame retardant ability test on the updated test piece to obtain a flame retardant index, and calculate a comprehensive performance value based on the external force resistance index, flame retardant index, and antibacterial index corresponding to the qualified test piece;

[0082] The optimal masterbatch preparation module is used to summarize the comprehensive performance values, obtain multiple comprehensive performance values, and confirm the maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values. The test ratio group corresponding to the maximum performance value is recorded as the successful ratio group. Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set and complete the preparation optimization of the antibacterial and flame retardant masterbatch.

[0083] In order to solve the above problem, the present invention further provides an electronic device, comprising:

[0084] a memory storing at least one instruction;

[0085] The processor executes the instructions stored in the memory to implement the above-mentioned preparation optimization method of the antibacterial and flame-retardant masterbatch for polypropylene.

[0086] In order to solve the above problems, the present invention also provides a computer-readable storage medium, which stores at least one instruction, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned preparation optimization method of polypropylene-specific antibacterial flame retardant masterbatch.

[0087] The present invention is to solve the problems described in the background technology. The present invention obtains a polypropylene matrix set, an antimicrobial agent set, a flame retardant set, a compatibilizer set, an antimicrobial range and a flame retardant range to confirm a masterbatch testing mechanism, wherein the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port. It can be seen that the embodiment of the present invention confirms the antimicrobial range and the flame retardant range in advance, and prepares the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, the compatibilizer set and the masterbatch testing mechanism in advance, which is convenient for subsequent automated preparation and testing, and then uniformly samples the antimicrobial range and the flame retardant range to obtain k test ratio groups. It can be seen that the embodiment of the present invention uniformly samples the antimicrobial range and the flame retardant range to cover a variety of possible The ratio of antibacterial agent and flame retardant can be combined to facilitate the subsequent screening of the optimal formula. The following operations are performed on each of the k test ratio groups: based on the test ratio group and the masterbatch testing mechanism, a ratio preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set. It can be seen that the embodiment of the present invention produces a corresponding test masterbatch set through the test ratio group, and combines the test masterbatch set with the polypropylene plastic products of a specific customer to pre-produce a standard test specimen for testing, thereby facilitating the subsequent analysis of the overall performance of the test masterbatch set after being combined with the polypropylene plastic products of a specific customer according to the standard test specimen, thereby improving the application effect of the antibacterial and flame retardant masterbatch for specific customers. The standard test piece is subjected to an external force resistance test to obtain an external force resistance index, and the external force resistance index is compared with a preset resistance threshold. If the external force resistance index is greater than the resistance threshold, the standard test piece is recorded as a qualified test piece. It can be seen that the embodiment of the present invention uses the resistance threshold to pre-exclude standard test pieces whose mechanical properties are excessively reduced due to the addition of masterbatch, thereby improving the efficiency of subsequent antibacterial effect tests and flame retardant ability tests. The qualified test pieces are summarized to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces: the qualified test piece is subjected to an antibacterial effect test to obtain an antibacterial index and an updated test piece is subjected to a flame retardant ability test to obtain a flame retardant index. It can be seen that the embodiment of the present invention obtains the antibacterial effect test and the flame retardant ability test by performing the antibacterial effect test and the flame retardant ability test. The antibacterial index and flame retardant index quantify the antibacterial and flame retardant capabilities of the standard test specimens. The comprehensive performance value is calculated based on the external force resistance index, flame retardant index, and antibacterial index corresponding to the qualified test specimens. It can be seen that the embodiment of the present invention calculates the comprehensive performance value through the external force resistance index, flame retardant index, and antibacterial index, reflecting the overall performance of the antibacterial and flame retardant masterbatch. The comprehensive performance values ​​are summarized to obtain multiple comprehensive performance values. The maximum performance value is determined based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values. The test ratio group corresponding to the maximum performance value is recorded as the successful ratio group. Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, a supplementary preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set.The target masterbatch set is obtained, completing the preparation optimization of the antimicrobial flame-retardant masterbatch. This shows that the embodiments of the present invention identify the maximum performance value from multiple comprehensive performance values, screen out the optimal test ratio group, and then use the optimal test ratio group again for formal production to obtain the target masterbatch set, thereby improving the overall performance of the antimicrobial flame-retardant masterbatch used in formal production. Therefore, the present invention can improve the overall performance of the antimicrobial flame-retardant masterbatch and enhance the application effect of the antimicrobial flame-retardant masterbatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 A schematic flow chart of a method for optimizing the preparation of antibacterial and flame-retardant masterbatch for polypropylene according to one embodiment of the present invention;

[0089] Figure 2 This is a functional module diagram of a system for optimizing the preparation of antibacterial and flame-retardant masterbatches for polypropylene according to one embodiment of the present invention;

[0090] Figure 3 A schematic structural diagram of an electronic device for implementing the method for optimizing the preparation of the polypropylene-specific antibacterial and flame-retardant masterbatch provided in one embodiment of the present invention.

[0091] Description of reference numerals:

[0092] 1. Electronic device; 10. Processor; 11. Memory; 12. Bus.

[0093] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0094] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0095] The present embodiment provides a method for optimizing the preparation of antimicrobial and flame-retardant masterbatches for polypropylene. The execution entity of the method includes, but is not limited to, at least one of electronic devices such as a server and a terminal that can be configured to execute the method provided in the present embodiment. In other words, the method can be executed by software or hardware installed on a terminal device or a server device, where the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0096] Reference Figure 1 FIG. 1 is a flow chart of a method for optimizing the preparation of polypropylene antibacterial and flame-retardant masterbatches according to an embodiment of the present invention. In this embodiment, the method for optimizing the preparation of polypropylene antibacterial and flame-retardant masterbatches includes:

[0097] S1. Obtain a polypropylene matrix set, an antimicrobial agent set, a flame retardant set, a compatibilizer set, an antimicrobial range, and a flame retardant range, and identify a masterbatch testing mechanism. The masterbatch testing mechanism includes a mixer, a twin-screw extruder, and an injection molding machine. The twin-screw extruder includes a main feed port and a side feed port.

[0098] In the embodiments of the present invention, a masterbatch refers to a granular material with specific functional properties, obtained by blending polypropylene as a base resin with various functional additives (such as antimicrobial agents, flame retardants, and compatibilizers), then melt-extruding and granulating it. For example, when using the masterbatch, customers simply add the masterbatch to ordinary polypropylene resin in a specific proportion and perform injection molding to impart specific functional properties, such as antimicrobial and flame retardant properties, to the resulting product.

[0099] It should be explained that the polypropylene matrix set refers to a certain mass of polypropylene. The antimicrobial agent set refers to a certain mass of antimicrobial agents, wherein the antimicrobial agent is an adjuvant with the ability to inhibit the reproduction of bacteria, fungi and viruses, such as nanosilver, nanozinc, nanocopper or titanium dioxide. The flame retardant set refers to a certain mass of flame retardants, wherein the flame retardant is an adjuvant that can improve the flame retardant properties of polypropylene materials, such as ammonium polyphosphate, cyanuric acid trimer, aluminum hydroxide or magnesium hydroxide. The compatibilizer set refers to a certain mass of compatibilizer, wherein the compatibilizer is an adjuvant used to improve the binding ability between polypropylene and antimicrobial agents and flame retardants, such as maleic anhydride grafted polypropylene or ethylene-propylene rubber grafted maleic anhydride. The specific type of antimicrobial agent, flame retardant and compatibilizer used are all determined by the staff of the masterbatch production plant.

[0100] It should be understood that although adding antimicrobial agents and flame retardants to polypropylene masterbatch can improve the antimicrobial and flame retardant capabilities of polypropylene masterbatch, excessive addition will also have an adverse effect on the mechanical properties of the polypropylene masterbatch itself. At the same time, due to the large variety of antimicrobial agents and flame retardants on the market, there will be interactions between antimicrobial agents and flame retardants. Therefore, at different addition ratios of antimicrobial agents and flame retardants, there will be large differences in the antimicrobial and flame retardant capabilities of the masterbatch after adding antimicrobial agents and flame retardants. Finally, when the produced masterbatch is officially put into use, there will be large differences in the effect of adding it to different products of different customers. Therefore, the main purpose of the embodiment of the present invention is to identify the corresponding optimal antimicrobial agent addition ratio and flame retardant addition ratio for specific antimicrobial agents, specific flame retardants and specific user products, thereby improving the overall performance of the masterbatch.

[0101] For example, when the staff of the masterbatch production plant prepares the antibacterial and flame-retardant masterbatch, the proportion of antibacterial agent added is generally 1% to 5% of the total weight of the polypropylene masterbatch. Therefore, the optional range of the proportion of antibacterial agent added to polypropylene is [1%, 5%], and the said [1%, 5%] is the antibacterial range, while the proportion of flame retardant added is generally 20% to 50% of the total weight of the polypropylene masterbatch. The optional range of the proportion of flame retardant added to polypropylene is [20%, 50%], and the said [20%, 50%] is the flame retardant range.

[0102] It should be explained that the masterbatch testing system is a device that integrates a mixer, a twin-screw extruder, and an injection molding machine. The mixer is used to mix polypropylene, flame retardant, and compatibilizer. Optionally, a Baopin Technology BP-8177-ZB twin-screw extruder is used as the twin-screw extruder. The injection molding machine is used to inject the molten preliminary mixed raw materials into a pre-built mold, and after curing and shaping, a preliminary test specimen is obtained.

[0103] It is understandable that since the antibacterial agent is sensitive to heat, if it stays in a high temperature and high shear environment for too long, it will decompose or inactivate. Therefore, the embodiment of the present invention performs graded feeding through the main feed port and the side feed port of the twin-screw extruder. After the preliminary test raw material enters the twin-screw extruder through the main feed port and is melted and plasticized, the antibacterial agent is then fused with the melted and plasticized preliminary test raw material through the side feed port, thereby reducing the residence time of the antibacterial agent in the high temperature zone and protecting its activity. Among them, the main feed port is located at the front end of the twin-screw extruder, and the side feed port is located at the interval between the melting section and the mixing and dispersion section of the twin-screw extruder.

[0104] S2. Uniformly sample the antibacterial range and the flame retardant range to obtain k test ratio groups.

[0105] In detail, the antibacterial range and the flame retardant range are tested and uniformly sampled to obtain k test ratio groups, including:

[0106] Performing a uniform sampling operation on the antibacterial range based on a preset first sampling interval to obtain p antibacterial ratios, and obtaining q flame retardant ratios based on a preset second sampling interval and flame retardant range;

[0107] Perform binary combinations on the p antibacterial ratios and the q flame retardant ratios to obtain k test ratio groups, wherein k=p×q, and each of the k test ratio groups includes: an antibacterial ratio and a flame retardant ratio.

[0108] It should be explained that the first sampling interval and the second sampling interval are manually set by the staff of the masterbatch production plant. Optionally, the first sampling interval is 1% and the second sampling interval is 5%. The binary combination of the p antibacterial ratios and the q flame retardant ratios means that each of the p antibacterial ratios is sequentially combined with each of the q flame retardant ratios.

[0109] For example, if the antibacterial range is [1%, 5%], the first sampling interval is 1%, if the flame retardant range is [20%, 50%], the second sampling interval is 5%, then 5 antibacterial ratios are obtained: 1%, 2%...5%, and 7 flame retardant ratios are obtained: 20%, 25%...50%. The 5 antibacterial ratios and 7 flame retardant ratios are binary combined to obtain 35 test ratio groups: (1%, 20%), (1%, 25%), (1%, 30%)...(5%, 50%).

[0110] S3. Perform the following operations on each of the k test ratio groups: perform proportional preparation operations on the polypropylene matrix set, antimicrobial agent set, flame retardant set, and compatibilizer set based on the test ratio group and the masterbatch testing mechanism to obtain a test masterbatch set, and use the test masterbatch set to obtain a standard test specimen.

[0111] In detail, the test masterbatch set is obtained by performing a proportional preparation operation on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set and the compatibilizer set based on the test proportion group and the masterbatch testing mechanism, including:

[0112] extracting a test polypropylene matrix from the polypropylene matrix set based on a preset test mass, and calculating the antibacterial mass based on the test mass and the antibacterial ratio in the test ratio group, wherein the antibacterial mass is the product of the test mass and the antibacterial ratio;

[0113] Test antimicrobials were extracted from the antimicrobial set based on their antimicrobial quality;

[0114] Get the tested flame retardant based on the tested mass, the flame retardant ratio in the tested ratio group, and the flame retardant set;

[0115] Obtain test compatibilizers based on test quality, preset addition ratio and compatibilizer set;

[0116] Using a mixer in a masterbatch testing mechanism, a test polypropylene matrix, a test compatibilizer, and a test flame retardant are mixed to obtain preliminary test raw materials;

[0117] The preliminary test raw materials were placed into the main feed port of the twin-screw extruder in the masterbatch test mechanism, and the test antimicrobial agent was placed into the side feed port of the twin-screw extruder to obtain a test extruder;

[0118] A test strip material is obtained by using a test extruder, and the test strip material is cooled and pelletized to obtain a test masterbatch set.

[0119] It should be explained that the test mass and the addition ratio are manually set by the staff of the masterbatch production factory. Preferably, the test mass is 10g and the addition ratio is 3%.

[0120] It should be understood that the method of extracting a test polypropylene matrix from the polypropylene matrix based on a preset test mass means: extracting polypropylene with a mass of the test mass from the polypropylene matrix as the test polypropylene matrix, and the mass of the test polypropylene matrix is ​​the test mass. The method of extracting a test antibacterial agent from the antibacterial agent set based on the antibacterial mass means: extracting an antibacterial agent with a mass of the antibacterial mass from the antibacterial agent set as the test antibacterial agent. The method of obtaining a test flame retardant based on the test mass, the flame retardant ratio in the test ratio group and the flame retardant set and the method of obtaining a test compatibilizer based on the test mass, the preset addition ratio and the compatibilizer set are the same as the method of obtaining a test antibacterial agent using the test mass, the antibacterial ratio in the test ratio group and the antibacterial agent set, and will not be repeated here.

[0121] It is understandable that the use of the mixer in the masterbatch testing mechanism to perform a mixing operation on the test polypropylene matrix, the test compatibilizer, and the test flame retardant to obtain a preliminary test raw material refers to: adding the test polypropylene matrix, the test compatibilizer, and the test flame retardant to the mixer for mixing, wherein a first mixing time for adding the test polypropylene matrix, the test compatibilizer, and the test flame retardant to the mixer for mixing is preset, and the first mixing time is manually set by the staff of the masterbatch production plant. The use of the test extruder to obtain the test strip material refers to: heating, melting, mechanically mixing, and propelling the preliminary test raw materials and the test antibacterial agent that have been added to the test extruder through the test extruder, and finally continuously extruding a strip-shaped molten extrudate at the head mold of the test extruder, and the strip-shaped molten extrudate is the test strip material. The cooling and pelletizing of the test strip material to obtain the test masterbatch set refers to: cooling (water cooling or air cooling) the test strip material continuously extruded from the twin-screw extruder to solidify and form it, and then cutting the solidified test strip material into a plurality of granular materials of a certain size by a pelletizing device. The plurality of granular materials of a certain size together constitute the test masterbatch set, and the test masterbatches in the test masterbatch set are the granular materials.

[0122] In detail, the method of obtaining a standard test specimen using a test masterbatch set includes:

[0123] Obtaining a test substrate set, confirming the mass of the masterbatch of the test masterbatch set, calculating the mass of the substrate according to the mass of the masterbatch and a preset masterbatch ratio, and extracting an additive substrate set from the test substrate set based on the mass of the substrate;

[0124] Using a mixer to perform a mixing operation on the added base material set and the test masterbatch set to obtain a preliminary mixed raw material;

[0125] Using an injection molding machine to perform injection molding on the preliminary mixed raw materials to obtain preliminary test specimens;

[0126] The preliminary test specimens are cured to obtain standard test specimens.

[0127] For example, a masterbatch production plant needs to produce a batch of antibacterial and flame-retardant masterbatches for supply to a polypropylene plastic product manufacturer. After obtaining the antibacterial and flame-retardant masterbatches, the polypropylene plastic product manufacturer will mix them with the raw materials of the plastic products in a certain proportion to improve the antibacterial and flame-retardant properties of the final polypropylene plastic products. The raw materials of the plastic products are the test substrate set.

[0128] It should be explained that the mass of the masterbatch is the mass of the test masterbatch set, and the masterbatch ratio is determined by the staff of the polypropylene plastic product manufacturer. Optionally, the masterbatch ratio is 10%.

[0129] In detail, the calculation formula of the substrate mass is as follows:

[0130]

[0131] Among them, m l is the mass of the substrate, m d is the mass of masterbatch, k d is the masterbatch ratio.

[0132] It should be understood that the method for extracting the additive substrate set from the test substrate set based on substrate mass is the same as the method for extracting the test antimicrobial agent from the antimicrobial agent set based on antimicrobial mass, and will not be repeated here. The method of using a mixer to mix the additive substrate set and the test masterbatch set to obtain a preliminary mixed raw material refers to: adding the additive substrate set and the test masterbatch set to the mixer for mixing, wherein a second mixing time for adding the additive substrate set and the test masterbatch set to the mixer is preset, and the second mixing time is manually set by the staff of the polypropylene plastic product manufacturer. The method of using an injection molding machine to perform injection molding on the preliminary mixed raw materials to obtain a preliminary test specimen refers to: putting the preliminary mixed raw materials into the hopper of the injection molding machine, melting the preliminary mixed raw materials through the injection molding machine, and then injecting them into a pre-constructed mold under the push of the screw of the injection molding machine, and then undergoing the steps of holding pressure, cooling and demoulding to form a preliminary test specimen, wherein the specific mold is prepared in advance by the staff of the polypropylene plastic product manufacturer, the shape of the preliminary test specimen is a rectangular parallelepiped, and the method of using an injection molding machine to melt the preliminary mixed raw materials, and then injecting them into a pre-constructed mold under the push of the screw of the injection molding machine, and then undergoing the steps of holding pressure, cooling and demoulding to form a preliminary test specimen is a prior art and will not be repeated here. The method of performing curing treatment on the preliminary test specimen to obtain a standard test specimen refers to: letting the preliminary test specimen that has just been injection molded stand for a period of time under certain temperature and humidity conditions to obtain a standard test specimen, so that its internal stress is released and the structure tends to be stable, which is convenient for subsequent external force resistance testing.

[0133] S4. Perform an external force resistance test on the standard test piece to obtain an external force resistance index, compare the external force resistance index with a preset resistance threshold, and if the external force resistance index is greater than the resistance threshold, record the standard test piece as a qualified piece.

[0134] It should be explained that the resistance threshold is set by the staff of the polypropylene plastic product manufacturer based on the mechanical properties of the polypropylene plastic product. Optionally, the staff of the polypropylene plastic product manufacturer uses 80% of the external force resistance index of the polypropylene plastic product produced without adding masterbatch as the resistance threshold.

[0135] Specifically, performing an external force resistance test on a standard test piece to obtain an external force resistance index includes:

[0136] Obtain a tensile testing machine and an impact testing machine, wherein the tensile testing machine includes: a tensile rod, a test fixture and a tensile force sensor, and the impact testing machine includes: a pendulum and a support;

[0137] Identify the fixed test specimen based on the standard test specimen, the test fixture of the tensile testing machine, and the tensile rod of the tensile testing machine;

[0138] The fixed test piece is stretched using a stretching rod of a tensile testing machine, and the tensile force of the fixed test piece when the stretching rod of the tensile testing machine is stretched is monitored in real time using a tensile sensor until the fixed test piece breaks, and the tensile force monitored by the tensile sensor when the fixed test piece breaks is used as the maximum resistance tensile force;

[0139] Place the standard test specimen on the support of the impact testing machine to obtain a placed test specimen;

[0140] Confirm the surface to be impacted where the test piece is placed, and confirm the impact cross-sectional area of ​​the surface to be impacted;

[0141] Using a pre-built camera to obtain an initial test image of the surface to be impacted, performing a grayscale operation on the initial test image to obtain a test grayscale image, wherein the test grayscale image includes: a plurality of test pixel points;

[0142] The test grayscale mean is calculated using multiple test pixels. The calculation formula is as follows:

[0143]

[0144] in, To test the grayscale mean, Grey i is the grayscale value of the i-th test pixel in the multiple test pixels, and n is the number of test pixels in the multiple test pixels;

[0145] Use the pendulum of the impact testing machine to perform an impact test on the test specimen to obtain the deformation of the specimen and the impact absorption energy;

[0146] The deformation specimen is placed on the support of the impact testing machine to obtain an impact test piece;

[0147] Obtain the impact grayscale mean based on the camera and the impact test piece;

[0148] The external force resistance index is calculated based on the maximum tensile resistance, impact cross-sectional area, impact absorption energy, test grayscale average, and impact grayscale average. The calculation formula is as follows:

[0149]

[0150] Among them, σ F is the external force resistance index, F max is the maximum resistance to tension, E s To absorb the impact energy, S T is the impact cross-sectional area, is the impact grayscale mean, || refers to the absolute value.

[0151] It should be explained that the impact testing machine is a simply supported beam impact testing machine, and the impact testing machine includes: a pendulum and a support. The support is the support platform on the impact testing machine for placing standard test specimens, and the pendulum refers to the heavy hammer component in the impact testing machine used to impact the placed test specimens. Optionally, the impact testing machine for simply supported beams of pipes produced by Tengda Testing Instrument Factory can be used as the impact testing machine, and after performing the impact test, the impact testing machine can automatically measure the impact absorption energy during the impact test. The tensile testing machine is a device used to perform tensile tests on standard test specimens, and the tensile testing machine includes: a test fixture, a tensile rod, and a tensile force sensor. The test fixture is the fixture used to secure the standard test specimen in the tensile testing machine. The tensile rod is a mechanical rod in the tensile testing machine that can stretch the fixed test specimen. The tensile force sensor is used to monitor the tensile force applied by the tensile rod when stretching the fixed test specimen. Optionally, the Shanghai Sonton Instrument WDW-1 electronic universal testing machine can be used as the tensile testing machine.

[0152] It can be understood that the identification of the fixed test specimen based on the standard test specimen, the test fixture of the tensile testing machine and the tensile rod of the tensile testing machine means: when it is confirmed that one end of the standard test specimen is fixed on the test fixture and the other end of the standard test specimen is connected to the tensile rod of the tensile testing machine, the standard test specimen at this time is the fixed metal wire.

[0153] For example, when one end of a standard test specimen is confirmed to be fixed to a test fixture and the other end of the standard test specimen is connected to a stretching rod of a tensile testing machine, a fixed test specimen is obtained. The stretching rod is controlled to slowly rise, thereby pulling the fixed test specimen to deform until the fixed test specimen breaks. The tensile force applied by the stretching rod to the fixed test specimen, as monitored by the tension sensor at the time of the fixed test specimen breaking, is used as the maximum resisting tensile force. Stretching the fixed test specimen using the stretching rod of the tensile testing machine refers to controlling the stretching rod to slowly move, thereby causing the fixed test specimen to deform.

[0154] It should be explained that the use of the pendulum of the impact testing machine to perform an impact test on the placement test specimen refers to: after placing the pendulum of the impact testing machine at a certain height, releasing the pendulum and allowing it to fall freely under the action of gravity, thereby impacting the placement test specimen during the falling process. Since the placement test specimen is in the shape of a rectangular parallelepiped, the surface to be impacted is the surface of the placement test specimen that will be impacted by the pendulum during the impact test. The deformed specimen refers to the placement test specimen after being impacted by the pendulum. The impact absorption energy refers to the part of the energy consumed when the pendulum impacts the specimen, and the impact testing machine can automatically measure the impact absorption energy during the impact test. The technology for the impact testing machine to automatically measure the impact absorption energy during the impact test is existing technology and will not be repeated here. The initial test image refers to the image of the surface to be impacted captured by the camera. Grayscaling the initial test image refers to converting the color value (red, green, and blue components) of each pixel in the initial test image into a single grayscale value. The technique for converting the color value (red, green, and blue components) of each pixel in the initial test image into a single grayscale value is prior art and is not further described here. The test grayscale image is the grayscaled initial test image, and the test pixel is a pixel in the test grayscale image.

[0155] It should be understood that the method for obtaining the impact grayscale mean based on a camera and placing an impact test piece is the same as the method for obtaining the test grayscale mean using a camera and placing a test piece, and will not be repeated here.

[0156] It can be understood that the present embodiment quantifies the degree of deformation or cracking of the test specimen after the impact test by comparing the impact grayscale mean with the test grayscale mean. The external force resistance index reflects the toughness of the standard test specimen; a higher external force resistance index indicates greater toughness.

[0157] S5. Summarize the qualified test pieces to obtain multiple qualified test pieces, and perform the following operations on each of the multiple qualified test pieces: perform an antibacterial effect test on the qualified test piece to obtain an antibacterial index and update the test piece, and perform a flame retardant ability test on the updated test piece to obtain a flame retardant index.

[0158] Specifically, performing antibacterial effect testing on qualified test pieces to obtain an antibacterial index and update the test pieces includes:

[0159] Performing a disinfection operation on the qualified test piece to obtain a disinfected test piece;

[0160] Obtain a bacterial dispersion, a sterile dropper, and a constant temperature and humidity test chamber, wherein the bacterial concentration of the bacterial dispersion is preset;

[0161] Extracting a target suspension from the bacterial dispersion using a preset extraction volume and a sterile dropper, and dropping the target suspension onto the surface of a sterilized test piece using a sterile dropper to obtain a bacteria-coated test piece;

[0162] The pre-constructed sterile polyethylene film is used to cover and laminate the bacteria-coated test piece to obtain a closed test piece;

[0163] Placing the sealed test piece in a constant temperature and humidity test chamber to obtain a cultured test piece, taking the time of obtaining the cultured test piece as the starting point and recording the time in real time to obtain the culture time, and confirming the end of the test piece based on the culture time, a preset culture time threshold, the constant temperature and humidity test chamber, and the cultured test piece;

[0164] The finished test piece is eluted with the pre-constructed sterile water to obtain the eluted bacterial solution and the updated test piece;

[0165] Perform plate count on the eluted bacterial solution to obtain the total number of bacterial cultures;

[0166] The antibacterial index is calculated based on the bacterial solution concentration, extraction volume, total bacterial culture number and culture time threshold. The calculation formula is as follows:

[0167]

[0168] Among them, σ p is the antibacterial index, c j is the bacterial solution concentration, V j is the extraction volume, t j is the cultivation time threshold, N z is the total number of bacterial cultures.

[0169] It should be clarified that the term "disinfected test strip" refers to a qualified test strip that has been disinfected. A bacterial dispersion refers to a bacterial suspension containing Staphylococcus aureus. Optionally, the bacterial suspension concentration is 100,000 CFU / ml, where CFU / ml refers to colony-forming units per milliliter. A sterile dropper refers to a sterilized dropper. A constant temperature and humidity chamber refers to a chamber capable of maintaining a constant temperature and humidity. Optionally, the extraction volume is 0.5 ml.

[0170] It is understandable that the extraction of the target suspension from the bacterial dispersion based on the preset extraction volume and the sterile dropper means: using a sterile dropper to extract a bacterial dispersion with a volume equal to the extraction volume as the target suspension. The use of a pre-constructed sterile polyethylene film to cover and adhere the sterile polyethylene film to the side of the sterile test piece on which the target suspension is dropped, so that the target suspension is evenly spread between the sterile polyethylene film and the sterile test piece. The sterile polyethylene film refers to a polyethylene film that has been sterilized, and the thickness of the polyethylene film is between 0.04 mm and 0.06 mm.

[0171] For example, if the culture test piece is obtained at 11:00, 11:00 is used as the starting point and the time is recorded in real time. At 11:02, the culture time is 2 minutes, and at 11:06, the culture time is 6 minutes.

[0172] It should be understood that the identification of the finished test piece based on the incubation time, the preset incubation time threshold, the constant temperature and humidity test chamber, and the incubation test piece means that when the incubation time of the incubation test piece in the constant temperature and humidity test chamber reaches the incubation time threshold, the incubation test piece at this time is the finished test piece. Optionally, the incubation time threshold is 24 hours. The use of pre-constructed sterile water to elute the bacterial solution on the finished test piece to obtain the eluted bacterial solution and the updated test piece means that the bacterial solution on the finished test piece is eluted with sterile water, the finished test piece after the elution of the bacterial solution is used as the updated test piece, and the liquid obtained by the elution is collected as the eluted bacterial solution. The performing of a plate count operation on the eluted bacterial solution to obtain the total bacterial culture count means that the total bacterial count in the eluted bacterial solution is counted using the plate colony count method. The total bacterial culture count is the total bacterial count. The technology of counting the total bacterial count in the eluted bacterial solution using the plate colony count method is prior art and will not be described in detail here.

[0173] It is understandable that the antibacterial index reflects the antibacterial ability of the qualified test piece. The larger the antibacterial index, the stronger the antibacterial ability of the qualified test piece.

[0174] Specifically, the flame retardancy test is performed on the updated test piece to obtain the flame retardancy index, including:

[0175] Obtain a flame test stand, and fix the updated test piece on the flame test stand to obtain a fixed test piece;

[0176] Perform a bottom ignition operation on the fixed test piece to obtain a burning test piece, record the time when the burning test piece is obtained, and obtain the initial time;

[0177] Use a pre-built metal basin to collect combustion waste from the combustion specimen until the combustion specimen is extinguished, obtain combustion drips, and record the time when the combustion specimen is extinguished to obtain the end time;

[0178] Weighing the burning drips to obtain the drip mass;

[0179] The flame retardant index is calculated based on the initial time, end time and dripping mass. The calculation formula is as follows:

[0180]

[0181] Among them, σ H is the flame retardant index, t end and t start are the end time and the initial time respectively, m H is the dripping mass.

[0182] It should be explained that the flame test stand is an iron frame used to fix the updated test piece. By fixing the updated test piece on the flame test stand, the updated test piece is suspended in the air, making it easier to ignite the bottom of the updated test piece and collect dripping materials.

[0183] For example, the bottom of a fixed test piece fixed on a flame test stand is ignited to obtain a burning test piece. If the time to obtain the burning test piece is 10:00:00, the initial time is 10:00:00. At the same time, a metal basin is used to collect the drippings produced by the burning test piece during the combustion process until the burning test piece is extinguished to obtain burning drippings. If the burning test piece is extinguished at 10:00:05, the termination time is 10:00:05, and the dripping mass is the mass of the burning drippings.

[0184] It should be understood that the flame retardancy index reflects the flame retardancy of the renewed test piece. The larger the flame retardancy index, the higher the flame retardancy of the renewed test piece.

[0185] S6. Calculate the comprehensive performance value based on the external force resistance index, flame retardant index and antibacterial index corresponding to the qualified test piece.

[0186] In detail, the calculation formula of the comprehensive performance value is as follows:

[0187]

[0188] Among them, ψ cx is the comprehensive performance value, e is the natural constant, and ln is the natural logarithm.

[0189] It should be explained that the comprehensive performance value is a value used to evaluate the overall performance of the standard test specimen corresponding to the qualified specimen. The larger the comprehensive performance value, the better the overall performance of the standard test specimen.

[0190] S7. Summarize the comprehensive performance values ​​to obtain multiple comprehensive performance values, and confirm the maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and record the test ratio group corresponding to the maximum performance value as the success ratio group.

[0191] S8. Based on the success ratio group and the external force resistance index corresponding to the success ratio group, a supplementary preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set to obtain the target masterbatch set, thereby completing the preparation optimization of the antibacterial and flame retardant masterbatch.

[0192] In detail, the method of performing supplementary preparation operations on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set based on the successful ratio group and the external force resistance index corresponding to the successful ratio group to obtain the target masterbatch set includes:

[0193] The updated compatibilizer ratio is calculated based on the external force resistance index and the addition ratio. The calculation formula is as follows:

[0194]

[0195] Among them, k x is to update the compatibilizer ratio, k0 is the addition ratio, σ0 is the preset reference resistance index, and tanh is the hyperbolic tangent function;

[0196] Obtain the production polypropylene matrix based on the preset production quality and polypropylene matrix set; obtain the production antibacterial agent based on the production quality, the antibacterial ratio in the success ratio group and the antibacterial agent set; obtain the production flame retardant based on the production quality, the flame retardant ratio in the success ratio group and the flame retardant set; obtain the production compatibilizer based on the production quality, the updated compatibilizer ratio and the compatibilizer set;

[0197] The target masterbatch set is obtained based on the mixer in the masterbatch testing institution, the twin-screw extruder in the masterbatch testing institution, the production of polypropylene matrix, the production of antibacterial agent, the production of flame retardant and the production of compatibilizer.

[0198] It should be explained that the reference resistance index is a value manually set by the staff of the masterbatch production plant. Optionally, the average value of the external force resistance index corresponding to all masterbatches produced in the history is used as the reference resistance index.

[0199] It should be understood that the embodiment of the present invention calculates the updated compatibilizer ratio by the external force resistance index and the reference resistance index, thereby configuring a better compatibilizer ratio for the subsequent production of masterbatch. The method for obtaining the production polypropylene matrix based on the preset production quality and polypropylene matrix set is the same as the method for obtaining the test polypropylene matrix based on the preset test quality and polypropylene matrix set, and will not be repeated here. The method for obtaining the production antibacterial agent based on the production quality, the antibacterial ratio in the success ratio group and the antibacterial agent set, the method for obtaining the production flame retardant based on the production quality, the flame retardant ratio in the success ratio group and the flame retardant set, and the method for obtaining the production compatibilizer based on the production quality, the updated compatibilizer ratio and the compatibilizer set are all the same as obtaining the test antibacterial agent using the test quality, the antibacterial ratio in the test ratio group and the antibacterial agent set, and will not be repeated here. The method for obtaining the target masterbatch set based on the mixer in the masterbatch testing mechanism, the twin-screw extruder in the masterbatch testing mechanism, the production of polypropylene matrix, the production of antibacterial agent, the production of flame retardant and the production of compatibilizer is the same as the method for obtaining the test masterbatch set using the mixer in the masterbatch testing mechanism, the twin-screw extruder in the masterbatch testing mechanism, the testing of polypropylene matrix, the testing of antibacterial agent, the testing of flame retardant and the testing of compatibilizer, and will not be repeated here.

[0200] The present invention is to solve the problems described in the background technology. The present invention obtains a polypropylene matrix set, an antimicrobial agent set, a flame retardant set, a compatibilizer set, an antimicrobial range and a flame retardant range to confirm a masterbatch testing mechanism, wherein the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port. It can be seen that the embodiment of the present invention confirms the antimicrobial range and the flame retardant range in advance, and prepares the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, the compatibilizer set and the masterbatch testing mechanism in advance, which is convenient for subsequent automated preparation and testing, and then uniformly samples the antimicrobial range and the flame retardant range to obtain k test ratio groups. It can be seen that the embodiment of the present invention uniformly samples the antimicrobial range and the flame retardant range to cover a variety of possible The ratio of antibacterial agent and flame retardant can be combined to facilitate the subsequent screening of the optimal formula. The following operations are performed on each of the k test ratio groups: based on the test ratio group and the masterbatch testing mechanism, a ratio preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set. It can be seen that the embodiment of the present invention produces a corresponding test masterbatch set through the test ratio group, and combines the test masterbatch set with the polypropylene plastic products of a specific customer to pre-produce a standard test specimen for testing, thereby facilitating the subsequent analysis of the overall performance of the test masterbatch set after being combined with the polypropylene plastic products of a specific customer according to the standard test specimen, thereby improving the application effect of the antibacterial and flame retardant masterbatch for specific customers. The standard test piece is subjected to an external force resistance test to obtain an external force resistance index, and the external force resistance index is compared with a preset resistance threshold. If the external force resistance index is greater than the resistance threshold, the standard test piece is recorded as a qualified test piece. It can be seen that the embodiment of the present invention uses the resistance threshold to pre-exclude standard test pieces whose mechanical properties are excessively reduced due to the addition of masterbatch, thereby improving the efficiency of subsequent antibacterial effect tests and flame retardant ability tests. The qualified test pieces are summarized to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces: the qualified test piece is subjected to an antibacterial effect test to obtain an antibacterial index and an updated test piece is subjected to a flame retardant ability test to obtain a flame retardant index. It can be seen that the embodiment of the present invention obtains the antibacterial effect test and the flame retardant ability test by performing the antibacterial effect test and the flame retardant ability test. The antibacterial index and flame retardant index quantify the antibacterial and flame retardant capabilities of the standard test specimens. The comprehensive performance value is calculated based on the external force resistance index, flame retardant index, and antibacterial index corresponding to the qualified test specimens. It can be seen that the embodiment of the present invention calculates the comprehensive performance value through the external force resistance index, flame retardant index, and antibacterial index, reflecting the overall performance of the antibacterial and flame retardant masterbatch. The comprehensive performance values ​​are summarized to obtain multiple comprehensive performance values. The maximum performance value is determined based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values. The test ratio group corresponding to the maximum performance value is recorded as the successful ratio group. Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, a supplementary preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set.The target masterbatch set is obtained, completing the preparation optimization of the antimicrobial flame-retardant masterbatch. This shows that the embodiments of the present invention identify the maximum performance value from multiple comprehensive performance values, screen out the optimal test ratio group, and then use the optimal test ratio group again for formal production to obtain the target masterbatch set, thereby improving the overall performance of the antimicrobial flame-retardant masterbatch used in formal production. Therefore, the present invention can improve the overall performance of the antimicrobial flame-retardant masterbatch and enhance the application effect of the antimicrobial flame-retardant masterbatch.

[0201] like Figure 2 1 is a functional module diagram of a system for optimizing the preparation of antibacterial and flame-retardant masterbatches for polypropylene according to an embodiment of the present invention.

[0202] The system 100 for optimizing the preparation of antimicrobial and flame-retardant polypropylene masterbatches described herein can be installed in an electronic device 1. Depending on the functionality implemented, the system 100 can include a masterbatch material preparation module 101, a test masterbatch preparation module 102, a product specimen testing module 103, and an optimal masterbatch preparation module 104. A module, also referred to as a unit, refers to a series of computer program segments that can be executed by an electronic device processor and perform a fixed function. These modules are stored in the electronic device's memory.

[0203] The masterbatch material preparation module 101 is used to obtain a polypropylene matrix set, an antimicrobial agent set, a flame retardant set, a compatibilizer set, an antimicrobial range, and a flame retardant range, and to identify a masterbatch testing mechanism, wherein the masterbatch testing mechanism includes: a mixer, a twin-screw extruder, and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port;

[0204] The test masterbatch preparation module 102 is used to uniformly sample the antibacterial range and the flame retardant range for testing to obtain k test ratio groups, and perform the following operations on each of the k test ratio groups: based on the test ratio group and the masterbatch testing mechanism, perform a ratio preparation operation on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and use the test masterbatch set to obtain a standard test specimen;

[0205] The product test piece testing module 103 is used to perform an external force resistance test on the standard test piece to obtain an external force resistance index, compare the external force resistance index with a preset resistance threshold, and if the external force resistance index is greater than the resistance threshold, record the standard test piece as a qualified test piece, summarize the qualified test pieces to obtain multiple qualified test pieces, and perform the following operations on each of the multiple qualified test pieces: perform an antibacterial effect test on the qualified test piece to obtain an antibacterial index and update the test piece, perform a flame retardant ability test on the updated test piece to obtain a flame retardant index, and calculate a comprehensive performance value based on the external force resistance index, flame retardant index, and antibacterial index corresponding to the qualified test piece;

[0206] The optimal masterbatch preparation module 104 is used to summarize the comprehensive performance values ​​to obtain multiple comprehensive performance values, and confirm the maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and the test proportion group corresponding to the maximum performance value is recorded as the successful proportion group. Based on the successful proportion group and the external force resistance index corresponding to the successful proportion group, a supplementary preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set to obtain the target masterbatch set, thereby completing the preparation optimization of the antibacterial and flame retardant masterbatch.

[0207] In detail, the modules in the preparation optimization system 100 for polypropylene antibacterial flame retardant masterbatch according to the embodiment of the present invention are used in the same manner as above. Figure 1 The same technical means are used as the preparation optimization method of polypropylene special antibacterial flame retardant masterbatch described in, and can produce the same technical effects, so I will not go into details here.

[0208] like Figure 3 , which is a structural diagram of an electronic device 1 for realizing a method for optimizing the preparation of antibacterial and flame-retardant masterbatch for polypropylene provided by an embodiment of the present invention.

[0209] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a program for optimizing the preparation of antibacterial and flame-retardant masterbatch for polypropylene.

[0210] Wherein, the memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a mobile hard disk, a multimedia card, a card-type memory (for example: SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as a mobile hard disk of the electronic device 1. In other embodiments, the memory 11 can also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1. Furthermore, the memory 11 also includes an internal storage unit of the electronic device 1 and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the electronic device 1, such as the code of the preparation optimization method program for polypropylene special antibacterial flame retardant masterbatch, etc., but can also be used to temporarily store data that has been output or is to be output.

[0211] In some embodiments, the processor 10 may be composed of an integrated circuit, such as a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips. The processor 10 is the control core (Control Unit) of the electronic device, connecting the various components of the entire electronic device using various interfaces and circuits. It executes or runs programs or modules stored in the memory 11 (such as a program for optimizing the preparation of antibacterial and flame-retardant masterbatch for polypropylene) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0212] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to enable communication between the memory 11 and at least one processor 10, etc.

[0213] Figure 3 Only the electronic device with components is shown, and it can be understood by those skilled in the art that Figure 3 The structure shown does not constitute a limitation on the electronic device 1 , and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0214] For example, although not shown, the electronic device 1 may further include a power source (such as a battery) for powering the various components. Preferably, the power source may be logically connected to the at least one processor 10 via a power management device, thereby implementing functions such as charging management, discharging management, and power consumption management through the power management device. The power source may further include any components such as one or more DC or AC power sources, a recharging device, a power failure detection circuit, a power converter or inverter, a power status indicator, etc. The electronic device 1 may further include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0215] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0216] Optionally, the electronic device 1 may further include a user interface, which may be a display or an input unit (such as a keyboard). Optionally, the user interface may also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touch device. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0217] The program for optimizing the preparation method of polypropylene-specific antibacterial and flame-retardant masterbatch stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When executed in the processor 10, the following can be achieved:

[0218] Obtain polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range;

[0219] Confirm the masterbatch testing mechanism, where the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port;

[0220] The antibacterial range and the flame retardant range were tested and sampled evenly to obtain k test ratio groups;

[0221] For each of the k test proportion groups, perform the following operations:

[0222] Based on the test proportion group and the masterbatch test mechanism, a proportion preparation operation is performed on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set;

[0223] Performing an external force resistance test on the standard test piece to obtain an external force resistance index, comparing the external force resistance index with a preset resistance threshold, and marking the standard test piece as a qualified test piece if the external force resistance index is greater than the resistance threshold;

[0224] The qualified test pieces are aggregated to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces:

[0225] Perform antibacterial effect test on qualified test pieces to obtain antibacterial index and update test pieces, perform flame retardant ability test on updated test pieces to obtain flame retardant index;

[0226] Calculate the comprehensive performance value based on the external force resistance index, flame retardant index and antibacterial index corresponding to the qualified test piece;

[0227] Summarizing the comprehensive performance values ​​to obtain multiple comprehensive performance values, determining a maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and recording the test proportion group corresponding to the maximum performance value as the success proportion group;

[0228] Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set, completing the preparation optimization of the antibacterial and flame retardant masterbatch.

[0229] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0230] Furthermore, if the modules / units integrated into the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0231] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program is executed by a processor of an electronic device, the computer program can implement:

[0232] Obtain polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range;

[0233] Confirm the masterbatch testing mechanism, where the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port;

[0234] The antibacterial range and the flame retardant range were tested and sampled evenly to obtain k test ratio groups;

[0235] For each of the k test proportion groups, perform the following operations:

[0236] Based on the test proportion group and the masterbatch test mechanism, a proportion preparation operation is performed on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set;

[0237] Performing an external force resistance test on the standard test piece to obtain an external force resistance index, comparing the external force resistance index with a preset resistance threshold, and marking the standard test piece as a qualified test piece if the external force resistance index is greater than the resistance threshold;

[0238] The qualified test pieces are aggregated to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces:

[0239] Perform antibacterial effect test on qualified test pieces to obtain antibacterial index and update test pieces, perform flame retardant ability test on updated test pieces to obtain flame retardant index;

[0240] Calculate the comprehensive performance value based on the external force resistance index, flame retardant index and antibacterial index corresponding to the qualified test piece;

[0241] Summarizing the comprehensive performance values ​​to obtain multiple comprehensive performance values, determining a maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and recording the test proportion group corresponding to the maximum performance value as the success proportion group;

[0242] Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set, completing the preparation optimization of the antibacterial and flame retardant masterbatch.

[0243] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only exemplary, and actual implementations may have other division methods.

[0244] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of the modules may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0245] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or hardware plus software functional modules.

[0246] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0247] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for optimizing the preparation of antibacterial and flame-retardant masterbatch for polypropylene, characterized in that: The method comprises: Obtain polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range; Confirm the masterbatch testing mechanism, where the masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine, and the twin-screw extruder includes: a main feed port and a side feed port; The antibacterial range and the flame retardant range were tested and sampled evenly to obtain k test ratio groups; For each of the k test proportion groups, perform the following operations: Based on the test proportion group and the masterbatch test mechanism, a proportion preparation operation is performed on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set; Performing an external force resistance test on the standard test piece to obtain an external force resistance index, comparing the external force resistance index with a preset resistance threshold, and marking the standard test piece as a qualified test piece if the external force resistance index is greater than the resistance threshold; The qualified test pieces are aggregated to obtain multiple qualified test pieces, and the following operations are performed on each of the multiple qualified test pieces: Perform antibacterial effect test on qualified test pieces to obtain antibacterial index and update test pieces, perform flame retardant ability test on updated test pieces to obtain flame retardant index; Calculate the comprehensive performance value based on the external force resistance index, flame retardant index and antibacterial index corresponding to the qualified test piece; Summarizing the comprehensive performance values ​​to obtain multiple comprehensive performance values, determining a maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values, and recording the test proportion group corresponding to the maximum performance value as the success proportion group; Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set, completing the preparation optimization of the antibacterial and flame retardant masterbatch.

2. The bonding parameter optimization method for a metal oxide semiconductor field effect transistor according to claim 1, wherein: The antibacterial range and the flame retardant range are tested and uniformly sampled to obtain k test ratio groups, including: Performing a uniform sampling operation on the antibacterial range based on a preset first sampling interval to obtain p antibacterial ratios, and obtaining q flame retardant ratios based on a preset second sampling interval and flame retardant range; Perform binary combinations on the p antibacterial ratios and the q flame retardant ratios to obtain k test ratio groups, wherein k=p×q, and each of the k test ratio groups includes: an antibacterial ratio and a flame retardant ratio.

3. The bonding parameter optimization method for a metal oxide semiconductor field effect transistor according to claim 2, wherein: The method comprises performing a proportional preparation operation on the polypropylene matrix set, the antimicrobial agent set, the flame retardant set and the compatibilizer set based on the test proportion group and the masterbatch testing mechanism to obtain a test masterbatch set, including: extracting a test polypropylene matrix from the polypropylene matrix set based on a preset test mass, and calculating the antibacterial mass based on the test mass and the antibacterial ratio in the test ratio group, wherein the antibacterial mass is the product of the test mass and the antibacterial ratio; Test antimicrobials were extracted from the antimicrobial set based on their antimicrobial quality; Get the tested flame retardant based on the tested mass, the flame retardant ratio in the tested ratio group, and the flame retardant set; Obtain test compatibilizers based on test quality, preset addition ratio and compatibilizer set; Using a mixer in a masterbatch testing mechanism, a test polypropylene matrix, a test compatibilizer, and a test flame retardant are mixed to obtain preliminary test raw materials; The preliminary test raw materials were placed into the main feed port of the twin-screw extruder in the masterbatch test mechanism, and the test antimicrobial agent was placed into the side feed port of the twin-screw extruder to obtain a test extruder; A test strip material is obtained by using a test extruder, and the test strip material is cooled and pelletized to obtain a test masterbatch set.

4. The bonding parameter optimization method for a metal oxide semiconductor field effect transistor according to claim 3, wherein: The method of obtaining a standard test specimen using the test masterbatch set includes: Obtaining a test substrate set, confirming the mass of the masterbatch of the test masterbatch set, calculating the mass of the substrate according to the mass of the masterbatch and a preset masterbatch ratio, and extracting an additive substrate set from the test substrate set based on the mass of the substrate; Using a mixer to perform a mixing operation on the added base material set and the test masterbatch set to obtain a preliminary mixed raw material; Using an injection molding machine to perform injection molding on the preliminary mixed raw materials to obtain preliminary test specimens; The preliminary test specimens are cured to obtain standard test specimens.

5. The bonding parameter optimization method for a metal oxide semiconductor field effect transistor according to claim 4, wherein: The external force resistance test is performed on the standard test piece to obtain the external force resistance index, including: Obtain a tensile testing machine and an impact testing machine, wherein the tensile testing machine includes: a tensile rod, a test fixture and a tensile force sensor, and the impact testing machine includes: a pendulum and a support; Identify the fixed test specimen based on the standard test specimen, the test fixture of the tensile testing machine, and the tensile rod of the tensile testing machine; The fixed test piece is stretched using a stretching rod of a tensile testing machine, and the tensile force of the fixed test piece when the stretching rod of the tensile testing machine is stretched is monitored in real time using a tensile sensor until the fixed test piece breaks, and the tensile force monitored by the tensile sensor when the fixed test piece breaks is used as the maximum resistance tensile force; Place the standard test specimen on the support of the impact testing machine to obtain a placed test specimen; Confirm the surface to be impacted where the test piece is placed, and confirm the impact cross-sectional area of ​​the surface to be impacted; Using a pre-built camera to obtain an initial test image of the surface to be impacted, performing a grayscale operation on the initial test image to obtain a test grayscale image, wherein the test grayscale image includes: a plurality of test pixel points; The test grayscale mean is calculated using multiple test pixels. The calculation formula is as follows: in, To test the grayscale mean, Grey i is the grayscale value of the i-th test pixel in the multiple test pixels, and n is the number of test pixels in the multiple test pixels; Use the pendulum of the impact testing machine to perform an impact test on the test specimen to obtain the deformation of the specimen and the impact absorption energy; The deformation specimen is placed on the support of the impact testing machine to obtain an impact test piece; Obtain the impact grayscale mean based on the camera and the impact test piece; The external force resistance index is calculated based on the maximum tensile resistance, impact cross-sectional area, impact absorption energy, test grayscale average, and impact grayscale average. The calculation formula is as follows: Among them, σ F is the external force resistance index, F max is the maximum resistance to tension, E s To absorb the impact energy, S T is the impact cross-sectional area, is the impact grayscale mean, || refers to the absolute value.

6. The method for preparing and optimizing the antibacterial and flame-retardant masterbatch for polypropylene according to claim 5, characterized in that: The antibacterial effect test is performed on the qualified test piece to obtain the antibacterial index and update the test piece, including: Performing a disinfection operation on the qualified test piece to obtain a disinfected test piece; Obtain a bacterial dispersion, a sterile dropper, and a constant temperature and humidity test chamber, wherein the bacterial concentration of the bacterial dispersion is preset; Extracting a target suspension from the bacterial dispersion using a preset extraction volume and a sterile dropper, and dropping the target suspension onto the surface of a sterilized test piece using a sterile dropper to obtain a bacteria-coated test piece; The pre-constructed sterile polyethylene film is used to cover and laminate the bacteria-coated test piece to obtain a closed test piece; Placing the sealed test piece in a constant temperature and humidity test chamber to obtain a cultured test piece, taking the time of obtaining the cultured test piece as the starting point and recording the time in real time to obtain the culture time, and confirming the end of the test piece based on the culture time, a preset culture time threshold, the constant temperature and humidity test chamber, and the cultured test piece; The finished test piece is eluted with the pre-constructed sterile water to obtain the eluted bacterial solution and the updated test piece; Perform plate count on the eluted bacterial solution to obtain the total number of bacterial cultures; The antibacterial index is calculated based on the bacterial solution concentration, extraction volume, total bacterial culture number and culture time threshold. The calculation formula is as follows: Among them, σ p is the antibacterial index, c j is the bacterial solution concentration, V j is the extraction volume, t j is the cultivation time threshold, N z is the total number of bacterial cultures.

7. The method for preparing and optimizing the antibacterial and flame-retardant masterbatch for polypropylene according to claim 6, characterized in that: The flame retardancy test is performed on the updated test piece to obtain the flame retardancy index, including: Obtain a flame test stand, and fix the updated test piece on the flame test stand to obtain a fixed test piece; Perform a bottom ignition operation on the fixed test piece to obtain a burning test piece, record the time when the burning test piece is obtained, and obtain the initial time; Use a pre-built metal basin to collect combustion waste from the combustion specimen until the combustion specimen is extinguished, obtain combustion drips, and record the time when the combustion specimen is extinguished to obtain the end time; Weighing the burning drips to obtain the drip mass; The flame retardant index is calculated based on the initial time, end time and dripping mass. The calculation formula is as follows: Among them, σ H is the flame retardant index, t end and t start are the end time and the initial time respectively, m H is the dripping mass.

8. The method for preparing and optimizing the antibacterial and flame-retardant masterbatch for polypropylene according to claim 7, characterized in that: The calculation formula of the comprehensive performance value is as follows: Among them, ψ cx is the comprehensive performance value, e is the natural constant, and ln is the natural logarithm.

9. The method for preparing and optimizing the antibacterial and flame-retardant masterbatch for polypropylene according to claim 8, characterized in that: The method performs a supplementary preparation operation on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set based on the successful ratio group and the external force resistance index corresponding to the successful ratio group to obtain a target masterbatch set, including: The updated compatibilizer ratio is calculated based on the external force resistance index and the addition ratio. The calculation formula is as follows: Among them, k x is to update the compatibilizer ratio, k0 is the addition ratio, σ0 is the preset reference resistance index, and tanh is the hyperbolic tangent function; Obtain the production polypropylene matrix based on the preset production quality and polypropylene matrix set; obtain the production antibacterial agent based on the production quality, the antibacterial ratio in the success ratio group and the antibacterial agent set; obtain the production flame retardant based on the production quality, the flame retardant ratio in the success ratio group and the flame retardant set; obtain the production compatibilizer based on the production quality, the updated compatibilizer ratio and the compatibilizer set; The target masterbatch set is obtained based on the mixer in the masterbatch testing mechanism, the twin-screw extruder in the masterbatch testing mechanism, the production of polypropylene matrix, the production of antibacterial agent, the production of flame retardant and the production of compatibilizer.

10. A preparation optimization system for polypropylene special antibacterial flame retardant masterbatch, characterized in that: The system comprises: The masterbatch material preparation module is used to obtain the polypropylene matrix set, antimicrobial agent set, flame retardant set, compatibilizer set, antimicrobial range and flame retardant range, and confirm the masterbatch testing mechanism. The masterbatch testing mechanism includes: a mixer, a twin-screw extruder and an injection molding machine. The twin-screw extruder includes: a main feed port and a side feed port. The test masterbatch preparation module is used to uniformly sample the antibacterial range and the flame retardant range for testing to obtain k test ratio groups. The following operations are performed on each of the k test ratio groups: based on the test ratio group and the masterbatch testing mechanism, a proportional preparation operation is performed on the polypropylene matrix set, the antibacterial agent set, the flame retardant set, and the compatibilizer set to obtain a test masterbatch set, and a standard test specimen is obtained using the test masterbatch set; A product test piece testing module is used to perform an external force resistance test on a standard test piece to obtain an external force resistance index, compare the external force resistance index with a preset resistance threshold, and if the external force resistance index is greater than the resistance threshold, record the standard test piece as a qualified test piece, summarize the qualified test pieces to obtain multiple qualified test pieces, and perform the following operations on each of the multiple qualified test pieces: perform an antibacterial effect test on the qualified test piece to obtain an antibacterial index and update the test piece, perform a flame retardant ability test on the updated test piece to obtain a flame retardant index, and calculate a comprehensive performance value based on the external force resistance index, flame retardant index, and antibacterial index corresponding to the qualified test piece; The optimal masterbatch preparation module is used to summarize the comprehensive performance values, obtain multiple comprehensive performance values, and confirm the maximum performance value based on the multiple comprehensive performance values, wherein the maximum performance value is the largest comprehensive performance value among the multiple comprehensive performance values. The test ratio group corresponding to the maximum performance value is recorded as the successful ratio group. Based on the successful ratio group and the external force resistance index corresponding to the successful ratio group, supplementary preparation operations are performed on the polypropylene matrix set, antibacterial agent set, flame retardant set, and compatibilizer set to obtain the target masterbatch set and complete the preparation optimization of the antibacterial and flame retardant masterbatch.

Images