Antibacterial and odor-removing master batch and preparation method thereof, antibacterial and odor-removing fiber and preparation method thereof

Abstract

The application discloses an antibacterial and peculiar smell removing master batch and a preparation method thereof, and antibacterial and peculiar smell removing fibers and a preparation method thereof, and belongs to the technical field of functional fibers. The mass percentage of components of the antibacterial and peculiar smell removing master batch comprises the following: 0.4-10% of an antibacterial agent, 2-20% of a whitening agent, 0.2-10% of a peculiar smell removing agent, 0.2-1.5% of a lubricant, 0.2-1.5% of an antioxidant, 0.2-5% of a surface modifier, and the balance of a base resin, wherein the lubricant, the antioxidant and the surface modifier do not contain ions that can chemically react with the antibacterial agent, the titanium whitening agent and the peculiar smell removing agent. The antibacterial and peculiar smell removing master batch can be prepared by using the preparation method. The antibacterial and peculiar smell removing fibers are obtained by sequentially drying, spinning and adding elasticity to the master batch. The fibers prepared by using the master batch can effectively improve the uniformity of color while maintaining the antibacterial property, can eliminate peculiar smell, can widen the dyeable range, can reduce the color matching difficulty and cost, and can increase the application range of the fibers.

Description

Technical Field

[0001] This invention relates to the field of functional fiber technology, and in particular to an antibacterial and deodorizing masterbatch and its preparation method, as well as an antibacterial and deodorizing fiber and its preparation method. Background Technology

[0002] Antibacterial and deodorizing fibers are made by adding antibacterial agents to fibers that do not have antibacterial properties, thus giving them antibacterial effects. This effectively kills and inhibits bacteria, fungi, and other microorganisms, blocking the spread of diseases and protecting human health. However, the antibacterial and deodorizing effects of existing fibers are very limited, restricting their promotion and application. Summary of the Invention

[0003] In view of this, the present invention provides an antibacterial and deodorizing masterbatch and its preparation method, and an antibacterial and deodorizing fiber and its preparation method. The antibacterial and deodorizing fiber prepared by the masterbatch can effectively improve the uniformity of color while maintaining antibacterial properties, eliminate odors, broaden the dyeable range, reduce the difficulty and cost of color matching, and increase the application range of the fiber, thus making it more suitable for practical use.

[0004] To achieve the first objective mentioned above, the technical solution of the antibacterial and deodorizing masterbatch provided by the present invention is as follows: This invention provides an antibacterial and odor-removing masterbatch, wherein the mass percentage of each component includes: 0.4%-10% antibacterial agent, 2%-20% whitening agent, 0.2%-10% odor remover, 0.2%-1.5% lubricant, 0.2%-1.5% antioxidant, 0.2%-5% surface modifier, and the balance being matrix resin. The lubricant, antioxidant, and surface modifier do not contain ions that would chemically react with the antibacterial agent, titanium whitening agent, or odor remover.

[0005] The antibacterial and deodorizing masterbatch provided by this invention can be further implemented using the following technical measures.

[0006] Preferably, the antibacterial agent is a copper-based alloy nanoparticle antibacterial agent, wherein the average particle size of the copper-based alloy nanoparticle antibacterial agent is 200nm-700nm and the sphericity is 0.5-1.0.

[0007] Preferably, the cupronickel alloy nanoparticle antibacterial agent is selected from one or a mixture of several of the following: nano copper-nickel alloy antibacterial agent, nano iron copper-nickel alloy antibacterial agent, nano zinc copper-nickel alloy antibacterial agent, nano manganese copper-nickel alloy antibacterial agent, and nano aluminum copper-nickel alloy antibacterial agent.

[0008] Preferably, the preparation method of the copper-based alloy nanopowder antibacterial agent includes the following steps: Copper ingots and corresponding metal ingots are synthesized in the gas phase, or, corresponding alloying elements that are dissolved in the copper ingots are added to the copper ingots to obtain copper alloy powder of the corresponding metal, wherein the corresponding metal is selected from one or a mixture of several of nickel, iron, zinc, manganese and aluminum. Based on the copper alloy powder of the corresponding metal, alloy nanopowder was prepared; The alloy nanopowder is subjected to oleophilic surface modification to obtain surface-modified alloy nanopowder, wherein the water contact angle of the surface-modified alloy nanopowder is 90°-150°. The surface-modified alloy nanoparticles were coated and dispersed to obtain a cupronickel alloy nanoparticle antibacterial agent.

[0009] Preferably, the brightener is a titanium dioxide brightener, the titanium dioxide brightener having an average particle size of 200nm-700nm and a sphericity of 0.5-1.0.

[0010] Preferably, the preparation method of the titanium dioxide brightener includes the following steps: Surface modification of titanium dioxide to make it more oleophilic is performed to obtain surface-modified titanium dioxide, wherein the water contact angle of the surface-modified titanium dioxide is 90°-150°. A titanium dioxide whitening agent was obtained by coating and dispersing surface-modified titanium dioxide.

[0011] Preferably, the odor remover is an ammonia odor remover, and the effective components of the ammonia odor remover are selected from one or a mixture of several of the following: sodium bisulfate, potassium hydrogen phthalate, sodium hexametaphosphate, zirconium phosphate, aluminum phosphate, zirconium hydrogen phosphate, cerium oxide, zirconium oxide, nano zeolite, and silver nitrate.

[0012] Preferably, the preparation method of the ammonia odor remover includes the following steps: The effective component of an ammonia odor remover is subjected to lipophilic surface modification to obtain a surface-modified effective component of the ammonia odor remover. The surface-modified effective component of the ammonia odor remover has a water contact angle of 90°-150°. The effective components of the surface-modified ammonia odor remover are coated and dispersed to obtain the ammonia odor remover.

[0013] Preferably, the surface-modifying agent is selected from one or a mixture of several of the following: oleic acid, stearic acid, alkylamine, fatty acid, citric acid, sodium citrate, sodium stearate, sodium oleate, calcium stearate, magnesium stearate, zinc stearate, lithium stearate, silane coupling agent, phthalate coupling agent, silicone grease, phosphate ester, and sodium hexametaphosphate.

[0014] Preferably, the matrix resin is selected from one or a mixture of several of PP, PET, PA6, PA66, PBT, and PLA.

[0015] Preferably, the lubricant is selected from one or a mixture of several of the following: low molecular weight wax, modified low molecular weight polyethylene, pentaerythritol stearate, silicate ester, phosphate ester, white oil, turpentine, mineral oil, silicone oil, hydroxyl silicone oil, isopropanol, stearic acid and its salts, and amide polymers.

[0016] Preferably, the antioxidant is selected from one or a mixture of several of antioxidants 1010, 1024, 1076, 1098, 168, and DNP.

[0017] To achieve the second objective mentioned above, the technical solution for preparing antibacterial and deodorizing masterbatch provided by this invention is as follows: The method for preparing the antibacterial and deodorizing masterbatch provided by the present invention includes the following steps: Take matrix resin slices, grind them into powder to obtain matrix resin powder; An antibacterial agent, a whitening agent, an odor remover, a surface modifier, and the matrix resin powder are mixed to obtain a first mixture. The lubricant, antioxidant, and the first mixture are mixed and granulated to obtain the antibacterial and deodorizing masterbatch. The antibacterial and odor-removing masterbatch contains the following components in terms of mass percentage: antibacterial agent 0.4%-10%, whitening agent 2%-20%, odor remover 0.2%-10%, lubricant 0.2%-1.5%, antioxidant 0.2%-1.5%, surface modifier 0.2%-5%, and the balance being matrix resin. The lubricant, antioxidant, and surface modifier do not contain ions that would chemically react with the antibacterial agent, titanium whitening agent, or odor remover.

[0018] To achieve the third objective mentioned above, the technical solution for the preparation method of antibacterial and deodorizing fibers provided by this invention is as follows: The method for preparing antibacterial and deodorizing fibers provided by the present invention includes the following steps: The antibacterial and deodorizing masterbatch provided by the present invention is subjected to drying, spinning and texturing in sequence to obtain the antibacterial and deodorizing fiber.

[0019] To achieve the fourth objective mentioned above, the technical solution for antibacterial and deodorizing fibers provided by this invention is as follows: The antibacterial and deodorizing fiber provided by this invention is prepared by the method for preparing antibacterial and deodorizing fiber provided by this invention.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The white antibacterial and deodorizing fiber provided by this invention uses a white copper-based alloy nanoparticle antibacterial agent as a raw material to prepare an antibacterial and deodorizing masterbatch. While maintaining the antibacterial properties of the masterbatch, it effectively improves the uniformity of the masterbatch color and eliminates acetic acid and isovaleric acid odor components in human sweat. Simultaneously, titanium dioxide whitening agent is used to adjust the color of the masterbatch, improve whiteness, broaden the dyeable range of the masterbatch, reduce the difficulty and cost of color matching, and increase the application range of the fiber. In addition, an ammonia odor remover is used to enhance the elimination effect of acetic acid and isovaleric acid ammonia odor components in human sweat.

[0021] Large particle size of functional powders reduces fiber mechanical properties and fiber yield, while small particle size leads to agglomeration, difficulty in uniform dispersion, and increased cost. Functional powders within the average particle size range can simultaneously achieve good fiber yield, fiber mechanical properties, and manufacturing cost.

[0022] Sphericity affects the dispersibility of functional powders in the matrix resin and the flow properties of the mixed melt, which in turn affects fiber yield and fiber mechanical properties. Functional powders within a certain sphericity range can simultaneously achieve good fiber yield, fiber mechanical properties, and manufacturing cost.

[0023] The functional powders within the water contact angle range exhibit good interfacial compatibility with the matrix resin, good dispersibility in the matrix resin, and high dispersion uniformity.

[0024] The main component of the copper-based alloy nanoparticle antibacterial agent is copper. Copper can simultaneously inhibit the growth of bacteria, viruses, and fungi, exhibiting excellent broad-spectrum antibacterial properties. Copper is also one of the trace elements required by the human body, is safe and non-toxic, and environmentally friendly. Furthermore, copper has a significant effect on eliminating isovaleric acid and acetic acid, components of human sweat odor.

[0025] Nano-sized white copper alloy powder is produced by gas-phase synthesis of copper and nickel ingots. Elements such as zinc, iron, manganese, and aluminum, which can be dissolved in copper and nickel, can also be added to produce complex white copper alloys such as iron-copper-nickel alloys, zinc-copper-nickel alloys, manganese-copper-nickel alloys, and aluminum-copper-nickel alloys. The purpose is to ensure the antibacterial properties of copper while making the fibers formed from the prepared masterbatch light-colored through the preparation of white copper alloys, thus broadening the range of dyeable materials, reducing the difficulty and cost of color matching, and increasing the application range of fibers.

[0026] The antibacterial agent of copper-based alloy nanoparticles within the specified content range can ensure the production of fibers and the antibacterial and deodorizing effects, while also taking into account the fiber production rate and preparation cost.

[0027] Titanium dioxide brighteners can adjust the color of masterbatches, improve their whiteness, broaden the dyeable range of masterbatches, reduce the difficulty and cost of color matching, and increase the application range of fibers. Within a certain content range, titanium dioxide brighteners can ensure fiber production and whiteness while also considering fiber yield and production costs.

[0028] Ammonia odor removers have a significant effect on eliminating ammonia, a component of human sweat odor. Furthermore, these removers are typically white or light yellow, which helps broaden the dyeable range of masterbatches. Ammonia odor removers within a specific content range can ensure fiber production and odor removal while also considering fiber yield and manufacturing costs.

[0029] Lubricants, antioxidants, and surface modifiers can effectively coat the antibacterial agent, titanium dioxide whitening agent, and ammonia odor remover in the copper alloy nanoparticles, thereby improving the interfacial compatibility between the three functional nanoparticles and the matrix resin, reducing their agglomeration, and effectively improving the dispersibility of the three functional powders in the matrix resin.

[0030] By using surface modifiers to modify the antibacterial agent, titanium dioxide whitening agent, and ammonia odor remover of copper alloy nanoparticles through lipophilic modification and coating dispersion treatment, the three functional powders are uniformly dispersed in the masterbatch. This reduces the tendency of the functional powders to agglomerate due to their small particle size, improves the uniformity and consistency of the masterbatch color, and at the same time, coating the antibacterial agent of copper alloy nanoparticles also has a certain antioxidant effect.

[0031] This invention also provides a method for preparing antibacterial and deodorizing masterbatch, which uses a step-by-step high- and low-speed mixing method to mix the raw materials, which can effectively improve the adhesion of the surface modifier to the surface of the three functional powders, improve the mixing degree between the raw materials, and make the dispersibility between the raw materials better.

[0032] This invention also provides a method for preparing white antibacterial and deodorizing fibers. The white copper-based antibacterial and deodorizing fibers prepared by this method are white, with good color consistency and uniformity, high antibacterial activity, broad-spectrum antibacterial activity, good deodorizing effect, high yield, and good washability.

[0033] The preparation method is characterized by simple and efficient preparation equipment, high repeatability, and broad application prospects. Detailed Implementation

[0034] In view of this, the present invention provides an antibacterial and deodorizing masterbatch and its preparation method, and an antibacterial and deodorizing fiber and its preparation method. The antibacterial and deodorizing fiber prepared by the masterbatch can effectively improve the uniformity of color while maintaining antibacterial properties, eliminate odors, broaden the dyeable range, reduce the difficulty and cost of color matching, and increase the application range of the fiber, thus making it more suitable for practical use.

[0035] Through arduous and persistent efforts, the inventor discovered that Antibacterial and odor-eliminating fibers, by adding antibacterial agents to fibers that lack antibacterial properties, impart antibacterial characteristics. This effectively kills and inhibits bacteria, fungi, and other microorganisms, blocking the spread of diseases and protecting human health. Copper possesses excellent broad-spectrum antibacterial properties and is also an essential trace element for the human body. Compared to commonly used antibacterial agents such as silver and zinc, it has unique advantages and is therefore receiving increasing attention, with huge market potential. Furthermore, considering that the main odor components of human sweat are acetic acid, isovaleric acid, and ammonia, copper has a significant elimination effect on isovaleric acid and acetic acid, making it highly valuable in applications where sweating is likely, such as sports, training, and extreme working conditions.

[0036] The existing technology has the following drawbacks: 1. Copper atoms and copper ions are inherently colored, making them difficult to dye when used in fibers; 2. Existing antibacterial and deodorizing fibers generally achieve their functionality through fiber or fabric post-processing, but they have poor water resistance, and their functionality weakens or disappears after washing. 3. Current copper-based antibacterial and deodorizing fibers have limited effectiveness in removing ammonia odor from human sweat; Therefore, developing a fiber material with good antibacterial properties, dyeability, and the ability to effectively remove the odors of acetic acid, isovaleric acid, and ammonia has become a key research focus. Simultaneously, how to precisely control the interfacial morphology of the composite modified powder and its high dispersibility in the matrix resin while ensuring antibacterial effects, and balancing fiber yield, mechanical properties, and durability, are also urgent problems to be solved.

[0037] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with preferred embodiments, details the specific implementation methods, structures, features, and effects of an antibacterial and deodorizing masterbatch and its preparation method, and an antibacterial and deodorizing fiber and its preparation method according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0038] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships, such as A and / or B. Specifically, it can mean that A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0039] Example 1 Example 1 of this invention provides a white antibacterial and deodorizing fiber, composed of 0.4% nano-copper-nickel alloy antibacterial agent, 5% titanium dioxide, 1% sodium hexametaphosphate, 92.2% PA6, 0.5% phosphate ester, 0.2% stearic acid, 0.2% antioxidant 1024, and 0.5% antioxidant 168. The average particle size of the nano-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 200 nm. The water contact angle after phosphate ester coating treatment is 130°, and the sphericity is 0.6.

[0040] The preparation method of antibacterial and deodorizing masterbatch includes the following steps: (1) Grinding: Add PA6 to a grinding mill and grind it into PA6 powder; (2) Weighing: Nano copper-nickel alloy antibacterial agent, titanium dioxide, zirconium hydrogen phosphate, PA6, low molecular weight wax, oleic acid, antioxidant 1024, antioxidant 168; (3) Modification: Nano copper-nickel alloy antibacterial agent, titanium dioxide, zirconium hydrogen phosphate and oleic acid are added to a high-speed mixer for high and low speed mixing. The low speed mixing speed is 700 rpm and the mixing time is 2 minutes. The high speed mixing speed is 1400 rpm and the mixing time is 30 seconds. The high and low speed mixing are alternated and each is mixed twice. (4) Mixing: Add PA6, low molecular weight wax, antioxidant 1024 and antioxidant 168 to a high-speed mixer containing modified raw materials and continue to mix at high and low speeds. The low speed mixing speed is 700 rpm and the mixing time is 2 minutes. The high speed mixing speed is 1400 rpm and the mixing time is 30 seconds. The high and low speed mixing are alternated and each is mixed twice. (5) Extrusion: The mixed raw materials are added to the screw extruder and extruded at a temperature of 255°C. The extruded filaments are cooled and solidified by cooling water. (6) Granulation: After the solidified filaments are dried by a blower, they are cut into granules by a pelletizer, which are called masterbatches.

[0041] The preparation method of antibacterial and deodorizing fibers includes the following steps: 1) Drying: The antibacterial masterbatch prepared above was dried in a vacuum drying oven for 48 hours; 2) Spinning: The dried antibacterial masterbatch is added to the spinning machine. The spinning temperature is 270℃. The melt is formed by high-temperature extrusion by the screw. After being metered by the metering pump, the melt is transported to the spinning assembly. It is then sprayed out through the spinneret to form filaments. The filaments are cooled by the side blowing device, oiled, and finally wound to obtain pre-oriented fibers. 3) Texturing: The texturing machine performs false twisting and texturing to obtain white copper-based antibacterial and deodorizing fibers with tensile deformation.

[0042] Example 2 Referring to the implementation scheme of Example 1, only the content of antibacterial agent was changed to 1%, while other conditions remained unchanged, to obtain Example 2.

[0043] Example 3 Referring to the implementation scheme of Example 1, only the content of antibacterial agent was changed to 3%, while other conditions remained unchanged, to obtain Example 4.

[0044] Example 4 Referring to the implementation scheme of Example 1, only the content of antibacterial agent was changed to 10%, while other conditions remained unchanged, to obtain Example 5.

[0045] Comparative Example 1 Referring to the implementation scheme of Example 1, only the content of antibacterial agent was changed to 0.2%, while other conditions remained unchanged, to obtain Comparative Example 1.

[0046] Comparative Example 2 Referring to the implementation scheme of Example 1, only the content of antibacterial agent was changed to 20%, while other conditions remained unchanged, to obtain Comparative Example 2.

[0047] Example 5 The white antibacterial and deodorizing fiber provided in Example 5 of this invention is composed of 2% nano-copper-nickel alloy antibacterial agent, 10% titanium dioxide, 1% zirconium hydrogen phosphate, 84% PA6, 1% low molecular weight wax, 1% oleic acid, 0.5% antioxidant 1024, and 0.5% antioxidant 168. The average particle size of the nano-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 500 nm. The water contact angle after oleic acid coating treatment is 90°, and the sphericity is 0.85. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0048] Example 6 Referring to the implementation scheme of Example 5, only the content of titanium dioxide whitening agent was changed to 2%, while other conditions remained unchanged, to obtain Example 6.

[0049] Example 7 Referring to the implementation scheme of Example 5, only the content of titanium dioxide brightener was changed to 5%, while other conditions remained unchanged, to obtain Example 7.

[0050] Example 8 Referring to the implementation scheme of Example 5, only the content of titanium dioxide whitening agent was changed to 20%, while other conditions remained unchanged, to obtain Example 8.

[0051] Comparative Example 3 Referring to the implementation scheme of Example 5, only the content of titanium dioxide brightener was changed to 1%, while other conditions remained unchanged, to obtain Comparative Example 3.

[0052] Comparative Example 4 Referring to the implementation scheme of Example 5, only the content of titanium dioxide whitening agent was changed to 25%, while other conditions remained unchanged, to obtain Comparative Example 4.

[0053] Example 9 The white antibacterial and deodorizing fiber provided in Example 9 of this invention is composed of 3% nano-copper-nickel alloy antibacterial agent, 10% titanium dioxide, 2% zirconium hydrogen phosphate, 82% PET, 1% pentaerythritol stearate, 1% silicone grease, and 1% antioxidant 1010. The average particle size of the nano-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 400 nm. The water contact angle after silicone grease coating is 100°, and the sphericity is 0.7. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0054] Example 10 Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed to 0.2%, while other conditions remained unchanged, to obtain Example 10.

[0055] Example 11 Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed to 0.5%, while other conditions remained unchanged, resulting in Example 11.

[0056] Example 12 Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed to 10%, while other conditions remained unchanged, resulting in Example 12.

[0057] Comparative Example 5 Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed to 0.1%, while other conditions remained unchanged, to obtain Comparative Example 5.

[0058] Comparative Example 6 Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed to 15%, while other conditions remained unchanged, to obtain Comparative Example 6.

[0059] Example 13 The white antibacterial and deodorizing fiber provided in Example 13 of this invention is composed of 1% nano-zinc-copper-nickel alloy antibacterial agent, 5% titanium dioxide, 1% zirconium oxide, 91% PA6, 0.5% low molecular weight wax, 0.5% sodium oleate, 0.5% antioxidant 1024, and 0.5% antioxidant 168. The average particle size of the nano-zinc-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 300 nm. The water contact angle after sodium oleate coating treatment is 110°, and the sphericity is 0.9. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0060] Example 14 Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 200 nm to obtain Example 14.

[0061] Example 15 Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 500 nm to obtain Example 14.

[0062] Example 16 Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 700 nm to obtain Example 14.

[0063] Comparative Example 7 Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 50 nm to obtain Comparative Example 7.

[0064] Comparative Example 8 Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 1000 nm to obtain Comparative Example 8.

[0065] Example 17 The white antibacterial and deodorizing fiber provided in Example 17 of this invention is composed of 4% nano-zinc-copper-nickel alloy antibacterial agent, 10% titanium dioxide, 1.5% cerium oxide, 80.5% PA66, 1.5% silicone oil, 1.5% silane coupling agent, 0.5% antioxidant 1024, and 0.5% antioxidant 168. The average particle size of the nano-zinc-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 300 nm. The water contact angle after silane coupling agent coating treatment is 120°, and the sphericity is 0.95. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0066] Example 18 Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed to 90°, resulting in Example 18.

[0067] Example 19 Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed to 130°, Example 19 was obtained.

[0068] Example 20 Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed to 150°, Example 20 was obtained.

[0069] Comparative Example 9 Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed to 170° to obtain Comparative Example 9.

[0070] Comparative Example 10 Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed, and no modification coating treatment was performed, to obtain Comparative Example 10.

[0071] Example 21 The white antibacterial and deodorizing fiber provided in Example 21 of this invention is composed of 0.8% nano-zinc-copper-nickel alloy antibacterial agent, 4% titanium dioxide, 1.5% sodium bisulfate, 90.7% PBT, 1% silicone oil, 1% titanate coupling agent, and 1% antioxidant 1076. The average particle size of the nano-zinc-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 350 nm. The water contact angle after oleic acid coating treatment with the titanate coupling agent is 105°, and the sphericity is 0.9. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0072] Example 22 Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 0.5 to obtain Example 22.

[0073] Example 23 Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 0.8, resulting in Example 23.

[0074] Example 24 Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 0.95, resulting in Example 24.

[0075] Example 25 Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 1, resulting in Example 25.

[0076] Comparative Example 11 Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 0.2 to obtain Comparative Example 11.

[0077] Example 26 The white antibacterial and deodorizing fiber provided by this invention is composed of 1.5% nano-iron-copper-nickel alloy antibacterial agent, 4.5% titanium dioxide, 1.5% nano-zeolite, 88.9% PP, 1.2% sodium hexametaphosphate, 1.2% magnesium stearate, and 1.2% antioxidant DNP. The average particle size of the nano-copper-nickel alloy antibacterial agent, titanium dioxide, and zirconium hydrogen phosphate is 250 nm. The water contact angle after magnesium stearate coating treatment is 95°, and the sphericity is 0.75. The preparation methods and steps of the antibacterial and deodorizing masterbatch and fiber are the same as in Example 1.

[0078] Comparative Example 12 Referring to the implementation scheme of Example 26, with other conditions unchanged, only the type of antibacterial agent was changed, and cuprous oxide powder was selected for comparison to obtain Comparative Example 12.

[0079] Comparative Example 13 Referring to the implementation scheme of Example 26, with other conditions unchanged, only the type of antibacterial agent was changed, and copper powder was selected for comparison to obtain Comparative Example 13.

[0080] Comparative Example 14 Referring to the implementation scheme of Example 26, with other conditions unchanged, only the type of antibacterial agent was changed, and zinc oxide powder was selected for comparison to obtain Comparative Example 14.

[0081] The effect of antibacterial agent content on beneficial effects Referring to the implementation scheme of Example 1, only the content of the antibacterial agent was changed while other conditions remained unchanged, resulting in Examples 2 to 4, Comparative Example 1 and Comparative Example 2.

[0082] The antibacterial and deodorizing fibers prepared in Examples 1 to 4, Comparative Examples 1 and 2 were tested, and the test results are shown in Table 1: Table 1. Control Experiment of Antibacterial Agent Content

[0083] The test results from the above examples and comparative examples show that, within the range of 0.4% to 10% antibacterial agent content in the raw materials, fibers can be prepared with increasing antibacterial agent content, and the antibacterial rate of the fibers increases to 99%. Staphylococcus aureus and Escherichia coli are bacteria, while Candida albicans is a fungus. The broad-spectrum advantage of the antibacterial and deodorizing fibers prepared by this invention is mainly reflected in their excellent antibacterial and antifungal properties. Furthermore, with increasing antibacterial agent content, the removal rate of components such as acetic acid and isovaleric acid also gradually increases.

[0084] However, samples exceeding this content range, such as Comparative Example 1 with an antibacterial agent content of 0.2%, show a significant decrease in the antibacterial rate and odor removal rate of the fiber when the antibacterial agent content is too low, resulting in insufficient antibacterial and odor removal properties. But when the antibacterial agent content is too high, such as Comparative Example 2 with an antibacterial agent content of 20%, issues such as slivering, inability to wind, and excessive breakage occur, making it impossible to prepare stretch deformable fibers.

[0085] The effect of titanium dioxide content on beneficial effects Referring to the implementation scheme of Example 5, only the content of titanium dioxide brightener was changed while other conditions remained unchanged, resulting in Examples 6 to 8, and Comparative Examples 3 to 4.

[0086] The color and yield of the antibacterial and deodorizing fibers prepared in Examples 5 to 8 and Comparative Examples 3 to 4 were tested, and the test results are shown in Table 2. Table 2. Comparison Experiment of Titanium Dioxide Content

[0087] The test results from the above examples and comparative examples show that when the titanium dioxide content in the raw materials is in the range of 2% to 20%, the fiber yield decreases and the fiber whiteness increases with the increase of titanium dioxide content. When the addition exceeds 20%, the increase in whiteness is not significant, but the fiber yield decreases considerably. When the titanium dioxide addition is 1%, the fiber appears gray, the whiteness is only 80, and the dyeability decreases.

[0088] The effect of ammonia odor remover content on beneficial effects Referring to the implementation scheme of Example 9, only the content of the ammonia odor remover zirconium hydrogen phosphate was changed, while other conditions remained unchanged, to obtain Examples 10 to 12.

[0089] The deodorizing fibers prepared in Examples 9 to 12 and Comparative Examples 5 to 6 were tested for their properties and fiber yield. The test results are shown in Table 3. Table 3. Comparison Experiment of Ammonia Odor Remover Content

[0090] The test results from the above examples and comparative examples show that when the ammonia odor remover content in the raw materials is within the range of 0.2% to 10%, fibers can be prepared as the content of the ammonia odor remover increases, and the ammonia odor removal rate of the fibers gradually increases. However, when the ammonia odor remover content is too low, such as in Comparative Example 5 where the ammonia odor remover content is 0.1%, the ammonia odor removal rate is too low. Conversely, when the ammonia odor remover content is too high, such as in Comparative Example 6 where the ammonia odor remover content is 15%, issues such as filament shedding, inability to wind, and excessive breakage occur, making it impossible to prepare stretch deformable fibers.

[0091] The effect of functional powder particle size on beneficial effects Referring to the implementation scheme of Example 13, with other conditions unchanged, only the average particle size of the three functional powders was changed to 200nm, 500nm, 700nm, 50nm, and 1000nm respectively, resulting in Examples 14 to 16.

[0092] The mechanical properties and yield of the antibacterial and deodorizing fibers prepared in Examples 13 to 16 and Comparative Examples 7 to 8 were compared, and the results are shown in Table 4.

[0093] Table 4 Functional Powder Particle Size Control Experiment

[0094] Comparing the antibacterial and deodorizing fibers prepared in the above embodiments and comparative examples, it was found that when the average particle size of the three functional powders was in the range of 200–700 nm, the fiber yield was relatively high, all above 80%, while controlling the preparation cost. However, when the average particle size was below this range, such as in Comparative Example 17 where the average particle size was 50 nm, the preparation cost increased significantly, and the fibers were prone to agglomeration, causing the yield to no longer increase. When the average particle size was above this range, such as in Comparative Example 18 where the average particle size was 1000 nm, problems such as filament drift, inability to wind, and excessive breakage occurred, making it impossible to prepare tensile deformable fibers.

[0095] As the particle size increases, under the premise of keeping the fiber fineness roughly the same, the spinnability of the prepared masterbatch decreases, the fiber yield decreases, the mechanical properties of the formed fiber deteriorate, and the tensile strength and tensile strain gradually decrease. However, when the particle size is less than 700 nm, the decrease in mechanical properties is not obvious.

[0096] In summary, the overall effect is better when the average particle size of the copper-based alloy nanoparticle antibacterial agent is in the range of 200–500 nm.

[0097] The effect of water contact angle on beneficial effects after functional powder modification Referring to the implementation scheme of Example 17, with other conditions unchanged, only the water contact angle of the three functional powders after modification was changed to 90°, 130°, 150°, 170°, respectively. Unmodified coating treatment was used to obtain Examples 18 to 20 and Comparative Examples 9 to 10.

[0098] The antibacterial and deodorizing fibers prepared in Examples 17 to 20 and Comparative Examples 9 to 10 were compared, and the results are shown in Table 5.

[0099] Table 5. Water Contact Angle Control Experiment of Functional Powders

[0100] Comparing the antibacterial and deodorizing fibers prepared in the above examples and comparative examples, it was found that when the water contact angle of the three functional powders was in the range of 90-150°, the fiber production rate was relatively high, all above 85%, while controlling the preparation cost. For samples without coating modification, such as Comparative Example 9, the fiber production rate was only 60%. When the water contact angle was higher than this range, such as 170° in Comparative Example 10, the fiber production rate no longer increased, and the antibacterial rate and odor removal rate began to decrease. This is because a large amount of modifier coating is required to achieve a water contact angle of 170°, and an excessively thick surface coating layer affects the functionality of the functional powders.

[0101] In summary, the overall effect is better when the water contact angle of the three functional powders after modification is in the range of 90~130°.

[0102] The effect of sphericity of functional powders on beneficial effects Referring to the implementation scheme of Example 21, with other conditions unchanged, only the sphericity of the three functional powders was changed to 0.5, 0.8, 0.95, 1, and 0.2 respectively to obtain Examples 22 to 25 and Comparative Example 11.

[0103] This experiment compares the antibacterial and deodorizing fibers prepared in Examples 21 to 25 and Comparative Example 11. The results are shown in Table 6.

[0104] Table 6. Comparison Experiment of Sphericity of Functional Powders

[0105] Comparing the antibacterial and deodorizing fibers prepared in the above embodiments and comparative examples, it was found that when the sphericity of the three functional powders was in the range of 0.5 to 1, the fiber production rate was relatively high, all above 80%, while controlling the preparation cost. However, when the sphericity was below the range, such as when the sphericity was 0.2 in Comparative Example 11, issues such as filament slippage, inability to wind, and excessive breakage occurred, making it impossible to prepare tensile deformable fibers.

[0106] With increasing sphericity, under the premise of controlling the fiber fineness to be approximately the same, the spinnability of the prepared masterbatch improves, the fiber yield increases, and the mechanical properties of the formed fiber improve, with tensile strength and tensile strain gradually increasing. However, when the sphericity is above 0.95, the improvement in yield and fiber mechanical properties is not significant, but the powder cost increases significantly. In summary, a sphericity range of 0.8~0.95 yields better overall results.

[0107] The Influence of Antibacterial Agent Type on Beneficial Effects Referring to the implementation scheme of Example 26, with other conditions unchanged, only the type of antibacterial agent was changed. Cuprous oxide powder, pure copper powder, and zinc oxide powder were selected for comparison to obtain Comparative Examples 12 to 14.

[0108] This experiment tested the properties of the fibers prepared in Example 26 and Comparative Examples 12 to 14 above. The test results are shown in Table 7. Table 7. Comparison Experiment of Antibacterial Agent Types

[0109] The test results from the above examples and comparative examples show that, for instance, in Comparative Example 12, replacing the antibacterial agent of the copper-based alloy nanoparticles with cuprous oxide, which has antibacterial properties, resulted in a purplish-red fiber because copper oxide is reddish-brown. Similarly, in Comparative Example 13, replacing the antibacterial agent of the copper-based alloy nanoparticles with pure copper powder, which has antibacterial properties, resulted in a pinkish-purple fiber, narrowing the application range of the fiber. In Comparative Example 14, replacing the antibacterial agent of the copper-based alloy nanoparticles with zinc oxide, which has antibacterial properties, resulted in a white fiber, but the antifungal inhibition rate was significantly reduced.

[0110] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0111] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An antibacterial and deodorizing masterbatch, characterized in that, The mass percentage of each component includes: antibacterial agent 0.4%-10%, whitening agent 2%-20%, odor remover 0.2%-10%, lubricant 0.2%-1.5%, antioxidant 0.2%-1.5%, surface modifier 0.2%-5%, and the balance is matrix resin. The lubricant, antioxidant, and surface modifier do not contain ions that can chemically react with the antibacterial agent, titanium whitening agent, and odor remover.

2. The antibacterial and deodorizing masterbatch according to claim 1, characterized in that, The antibacterial agent is a copper-based alloy nanoparticle antibacterial agent, with an average particle size of 200nm-700nm and a sphericity of 0.5-1.

0.

3. The antibacterial and deodorizing masterbatch according to claim 2, characterized in that, The copper-based alloy nanoparticle antibacterial agent is selected from one or a mixture of several of the following: nano copper-nickel alloy antibacterial agent, nano iron copper-nickel alloy antibacterial agent, nano zinc copper-nickel alloy antibacterial agent, nano manganese copper-nickel alloy antibacterial agent, and nano aluminum copper-nickel alloy antibacterial agent.

4. The antibacterial and deodorizing masterbatch according to claim 2, characterized in that, The preparation method of the copper-based alloy nanopowder antibacterial agent includes the following steps: Copper ingots and corresponding metal ingots are synthesized in the gas phase, or, corresponding alloying elements that are dissolved in the copper ingots are added to the copper ingots to obtain copper alloy powder of the corresponding metal, wherein the corresponding metal is selected from one or a mixture of several of nickel, iron, zinc, manganese and aluminum. Based on the copper alloy powder of the corresponding metal, alloy nanopowder was prepared; The alloy nanopowder is subjected to oleophilic surface modification to obtain surface-modified alloy nanopowder, wherein the water contact angle of the surface-modified alloy nanopowder is 90°-150°. The surface-modified alloy nanoparticles were coated and dispersed to obtain a copper-based alloy nanoparticle antibacterial agent.

5. The antibacterial and deodorizing masterbatch according to claim 1, characterized in that, The brightening agent is a titanium dioxide brightening agent, and the average particle size of the titanium dioxide brightening agent is 200nm-700nm, and the sphericity is 0.5-1.

0.

6. The antibacterial and deodorizing masterbatch according to claim 5, characterized in that, The preparation method of the titanium dioxide brightener includes the following steps: Titanium dioxide is subjected to lipophilic surface modification to obtain surface-modified titanium dioxide, wherein the water contact angle of the surface-modified titanium dioxide is 90°-150°; A titanium dioxide whitening agent was obtained by coating and dispersing surface-modified titanium dioxide.

7. The antibacterial and deodorizing masterbatch according to claim 1, characterized in that, The odor remover is an ammonia odor remover, and the effective components of the ammonia odor remover are selected from one or a mixture of several of the following: sodium bisulfate, potassium hydrogen phthalate, sodium hexametaphosphate, zirconium phosphate, aluminum phosphate, zirconium hydrogen phosphate, cerium oxide, zirconium oxide, nano zeolite, and silver nitrate. Preferably, the preparation method of the ammonia odor remover includes the following steps: The effective component of an ammonia odor remover is subjected to lipophilic surface modification to obtain a surface-modified effective component of the ammonia odor remover. The surface-modified effective component of the ammonia odor remover has a water contact angle of 90°-150°. The effective components of the surface-modified ammonia odor remover are coated and dispersed to obtain the ammonia odor remover. Preferably, the surface-modifying agent is selected from one or a mixture of several of the following: oleic acid, stearic acid, alkylamine, fatty acid, citric acid, sodium citrate, sodium stearate, sodium oleate, calcium stearate, magnesium stearate, zinc stearate, lithium stearate, silane coupling agent, phthalate coupling agent, silicone grease, phosphate ester, and sodium hexametaphosphate. Preferably, the matrix resin is selected from one or a mixture of several of PP, PET, PA6, PA66, PBT, and PLA. Preferably, the lubricant is selected from one or a mixture of several of the following: low molecular weight wax, modified low molecular weight polyethylene, pentaerythritol stearate, silicate ester, phosphate ester, white oil, turpentine, mineral oil, silicone oil, hydroxyl silicone oil, isopropanol, stearic acid and its salts, and amide polymers. Preferably, the antioxidant is selected from one or a mixture of several of antioxidants 1010, 1024, 1076, 1098, 168, and DNP.

8. The method for preparing the antibacterial and deodorizing masterbatch according to any one of claims 1-7, characterized in that, Includes the following steps: Take matrix resin slices, grind them into powder to obtain matrix resin powder; An antibacterial agent, a whitening agent, an odor remover, a surface modifier, and the matrix resin powder are mixed to obtain a first mixture. The lubricant, antioxidant, and the first mixture are mixed and granulated to obtain the antibacterial and deodorizing masterbatch. The antibacterial and odor-removing masterbatch contains the following components in terms of mass percentage: antibacterial agent 0.4%-10%, whitening agent 2%-20%, odor remover 0.2%-10%, lubricant 0.2%-1.5%, antioxidant 0.2%-1.5%, surface modifier 0.2%-5%, and the balance being matrix resin. The lubricant, antioxidant, and surface modifier do not contain ions that would chemically react with the antibacterial agent, titanium whitening agent, or odor remover.

9. A method for preparing an antibacterial and deodorizing fiber, characterized in that, Includes the following steps: The antibacterial and deodorizing masterbatch according to any one of claims 1-7 is sequentially dried, spun, and texturized to obtain the antibacterial and deodorizing fiber.

10. An antibacterial and deodorizing fiber, characterized in that, The antibacterial and deodorizing fiber is prepared by the method for preparing the antibacterial and deodorizing fiber according to claim 9.

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