Peninsula antibacterial elastic composite fiber and preparation method thereof

Abstract

The present application relates to the technical field of composite fibers, and discloses a peninsula antibacterial elastic composite fiber and a preparation method thereof.The fiber is composed of a base and islands semi-inlaid on the base, the base is composed of a rigid component and a porous inorganic antibacterial agent, and the islands are elastic components.The elastic components in the fiber are not subjected to antibacterial treatment, and only the base is subjected to antibacterial treatment.The porous inorganic antibacterial agent is used for antibacterial treatment, the porous inorganic antibacterial agent modifies the base to form a moisture absorption gradient between the base and the islands, so that moisture is enriched from the islands to the base after contacting the fiber, and the reproduction of microorganisms has a tendency to water, so that the microorganisms are transferred from the islands to the base and are inhibited and killed by the porous inorganic antibacterial agent.The elastic components are not affected, and the elastic performance is excellent, and meanwhile, the porous inorganic antibacterial agent can also make the whole fiber have excellent antibacterial effect, so that the peninsula fiber has excellent elasticity and antibacterial property, and in addition, the fiber also has excellent moisture absorption and sweat releasing performance.

Description

Technical Field

[0001] This invention relates to the field of composite fiber technology, and in particular to a peninsula antibacterial elastic composite fiber and its preparation method. Background Technology

[0002] Elastic composite fibers are fibers formed by combining two or more components, possessing stable high elasticity, resilience, and creep resistance. Polyethylene naphthalate (PEN) is a novel fiber, where the benzene rings on PET are replaced with rigid naphthalene rings. Compared to PET, PEN exhibits superior rigidity, heat resistance, acid and alkali resistance, and UV resistance, and is commonly used in high-end fiber products, such as the parallel-type PTT / PEN elastic composite fiber disclosed in publication number CN203256402U. During the research on antibacterial treatment of the aforementioned elastic composite fibers, this invention found that existing technologies mainly employ three methods for antibacterial treatment: antibacterial finishing agents, inorganic antibacterial agents, and resin antibacterial modification. However, antibacterial finishing agents suffer from poor antibacterial durability; their antibacterial properties significantly decrease after repeated washing. Therefore, antibacterial treatment requires antibacterial treatment of components exposed to the outside. Although inorganic antibacterial agents and resin modification have excellent antibacterial durability, adding inorganic antibacterial agents and modifiers to the elastic component will significantly reduce the elastic properties of the elastic component. At the same time, the elastic component of elastic composite fibers needs to be exposed to provide a soft and elastic feel. This means that elastic composite fibers cannot simultaneously achieve both antibacterial properties and elasticity. Summary of the Invention

[0003] The purpose of this invention is to improve rigidity while ensuring that elastic composite fibers also possess elasticity and antibacterial properties.

[0004] This invention provides a peninsula-type antibacterial composite fiber composed of a matrix and islands semi-embedded in the matrix. The matrix consists of a rigid component and a porous inorganic antibacterial agent, while the islands are elastic components. The elastic component in this fiber is not treated with antibacterial agents; only the matrix undergoes antibacterial and pore-forming treatment. The antibacterial treatment utilizes a porous inorganic antibacterial agent, which modifies the matrix to create a hygroscopic gradient between the matrix and the islands. This allows water to accumulate from the islands to the matrix upon contact with the fiber. Since microorganisms are attracted to water, they migrate from the islands to the matrix. Contact with the porous inorganic antibacterial agent triggers an antibacterial and bactericidal effect, thus achieving overall antibacterial protection of the fiber. Simultaneously, the pore-forming agent creates a pitted distribution on the surface of the matrix material, increasing the antibacterial surface area and compensating for the loss of antibacterial area due to the elastic material partially covering the matrix surface, thereby enhancing the antibacterial effect. The fiber's elastic components remain unaffected, resulting in excellent elasticity. Simultaneously, the porous, agent-free antibacterial agent provides excellent antibacterial properties throughout the fiber, giving the peninsula fiber both superior elasticity and antibacterial characteristics. Furthermore, the porous, agent-free antibacterial agent also imparts excellent moisture-wicking properties to the fiber.

[0005] The specific technical solution of this invention is as follows: A peninsula antibacterial elastic composite fiber includes a matrix and islands semi-embedded in the matrix. The matrix is ​​a rigid resin and a porous inorganic antibacterial agent, and the islands are elastomeric resins. The rigid resin is polyethylene naphthalate, and the elastomeric resin is one or more of thermoplastic polyester elastomer and thermoplastic polyurethane elastomer.

[0006] Preferably, the rigid resin is polyethylene naphthalate (PEN), and the elastomer resin is one or more of thermoplastic polyester elastomer (TPEE) and thermoplastic polyurethane elastomer (TPU).

[0007] Preferably, the porous inorganic antibacterial agent is a porous material loaded with antibacterial metal. The porous material is one or more of zeolite, mesoporous silica, porous kaolin, and mesoporous titanium dioxide, and the porosity of the porous material is 45-65%.

[0008] Preferably, the amount of inorganic antibacterial agent added to the matrix is ​​1-5%.

[0009] Preferably, the cross-sectional area of ​​the island accounts for 20-25%, and the inlay depth of the island is 1 / 3 to 1 / 2 of the island diameter.

[0010] As a preferred option, the peninsula antibacterial elastic composite fiber has a single filament fineness of 1.5~3 dtex and a length of 38~51 mm.

[0011] Preferably, the rigid resin is a porous resin, and the raw materials for the porous resin are antibacterial PEN and a porogen; the porogen includes, but is not limited to, sodium bicarbonate and aluminum hydroxide.

[0012] Because the elastic islands of the peninsula-type antibacterial elastic composite fiber occupy the circumferential surface of the matrix, reducing the antibacterial contact area of ​​the matrix, this invention further modifies the rigid matrix. A pore-forming agent and antibacterial PEN resin are used to prepare the rigid resin. When the antibacterial PEN with added pore-forming agent passes through the spinneret, the pore-forming agent decomposes to form gas, thereby creating a porous structure on the rigid resin matrix. This porous structure significantly increases the antibacterial base area. Setting the rigid matrix as a porous structure can handle scenarios with large amounts of sweat. When the amount of sweat or other liquids containing microorganisms is excessive, the liquid will encapsulate the entire fiber. The larger the area of ​​the fiber containing antibacterial components, the stronger the killing effect on microorganisms in the liquid. In addition, the porous structure can adsorb and enrich microorganisms. After microorganisms are adsorbed and enriched into the fiber pores with bactericidal effects, they can be concentrated and eliminated.

[0013] A method for preparing the above-mentioned peninsula antibacterial elastic composite fiber includes the following steps: (1) The rigid resin is mixed with an inorganic antibacterial agent and dried to prepare a matrix resin; (2) Melt extrusion of matrix resin and elastomer resin to obtain molten matrix resin and molten elastomer resin; (3) The molten matrix resin and molten elastomer resin are injected into the spinneret to form peninsula antibacterial elastic composite fiber.

[0014] Preferably, the conditions for blending and drying in step (1) include: temperature 160~170℃ and time 8~10h.

[0015] Preferably, the melt extrusion temperature of the matrix resin is 280~290℃, and the melt extrusion temperature of the elastomer resin is 180~225℃.

[0016] Preferably, the melt index matching ratio of the matrix resin and the elastomer resin is 1.5~2.2:1.

[0017] Preferably, the spinneret is a peninsula spinneret.

[0018] Existing elastic composite fibers suffer from the problem of not being able to simultaneously achieve both elasticity and antibacterial properties. This invention addresses this issue by providing a peninsula-shaped antibacterial composite fiber, which consists of a matrix and islands semi-embedded within the matrix. The matrix comprises a rigid component and an inorganic antibacterial agent, while the islands are elastic components. This invention incorporates the inorganic antibacterial agent into the matrix, forming an antibacterial layer on the matrix surface. This allows for the inhibition and elimination of microorganisms upon contact with the inorganic antibacterial agent. Furthermore, to ensure that the elastic properties of the elastic component are not affected, this invention does not subject the elastic component to antibacterial treatment. Instead, the elastic component is semi-embedded in the matrix in a peninsula-like manner, with part of the elastic component contained within the matrix and the other part exposed to the outside. This structure preserves the fiber's soft, elastic feel and maintains excellent elasticity.

[0019] Furthermore, this invention employs a porous inorganic antibacterial agent to address the antibacterial properties of peninsula fibers. Modifying the matrix with this agent significantly enhances the hydrophilic and hygroscopic properties of the matrix surface, creating a hygroscopic gradient between the matrix and the elastic component. This causes water to transfer from the elastic component to the matrix upon contact with the fiber. Since microbial growth requires water, microorganisms migrate from the elastic component to the matrix surface along with the water. The porous inorganic antibacterial agent itself is inorganic; therefore, when microorganisms transfer to the matrix and come into contact with it, the agent triggers its killing effect, resulting in excellent antibacterial properties for the peninsula fibers.

[0020] The porous inorganic antibacterial agent of the present invention uses a porous material loaded with antibacterial metal. The porous material is rich in hydrogen bonds and hydroxyl groups and has excellent hydrophilicity. After the porous inorganic antibacterial agent is added to the matrix surface, it has excellent moisture absorption and perspiration wicking effect. When sweat moisture comes into contact with the fiber, it will be enriched by the porous inorganic antibacterial agent. At the same time, the continuity of the matrix will quickly absorb and diffuse the moisture to the fiber matrix surface.

[0021] Compared with the prior art, this application has the following technical effects: The peninsula-type antibacterial composite fiber consists of a matrix and islands semi-embedded in the matrix. The matrix comprises a rigid component and a porous inorganic antibacterial agent, while the islands are elastic components. In this structure, the elastic components are not treated with antibacterial agents, but the semi-embedded structure ensures the interfacial bonding and crimp stability between the elastic components and the matrix, while also maintaining the elastic feel of the exposed elastic components. Modifying the matrix with a porous inorganic antibacterial agent creates a water absorption gradient between the matrix and the islands. This allows moisture to accumulate from the islands to the matrix upon contact with the fiber. Since microorganisms are attracted to water, they migrate from the islands to the matrix. Contact with the porous inorganic antibacterial agent triggers an antibacterial and bactericidal effect. Treating the matrix solely with a porous inorganic antibacterial agent imparts excellent antibacterial properties to the entire fiber, while also giving it excellent moisture-wicking properties, resulting in a fiber that combines superior elasticity and antibacterial activity. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the elastic composite fiber in Example 1.

[0023] Figure 2 This is a schematic cross-sectional view of the elastic composite fiber in Example 2.

[0024] Figure 3 This is a schematic cross-sectional view of the elastic composite fiber in Example 3. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments.

[0026] To better understand the content of this invention, further explanation is provided below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of this invention.

[0027] Example 1:

[0028] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is silver-loaded porous zeolite with a porosity of 50%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare the matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 280℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0029] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0030] Example 2:

[0031] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is zinc-loaded porous zeolite with a porosity of 45%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) are injected into a high-speed mixer and dried and mixed at 160~170℃ for 8~10h to prepare matrix resin; TPEE is placed in an oven at 110~120℃ and dried for 3~4h; (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 290℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 280℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0032] like Figure 2 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and four symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 20%, and the embedding depth of the islands is 1 / 2.5 of the island diameter.

[0033] Example 3:

[0034] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is copper-loaded porous zeolite with a porosity of 65%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare the matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 275~285℃, 20~25℃ ring blowing cooling, wind speed 0.45 m / s, total stretch ratio of 2.5 times, heat setting temperature 125℃.

[0035] like Figure 3As shown, the peninsula antibacterial elastic composite fiber includes a matrix and five symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 40%, and the embedding depth of the islands is 1 / 3 of the island diameter.

[0036] Example 4:

[0037] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is silver-loaded mesoporous silica with a porosity of 55%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​1%) were injected into a high-speed mixer and dried and mixed at 160°C for 10h to prepare matrix resin; TPEE was placed in an oven at 110°C and dried for 4h. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 280℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 210℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 275℃, 20℃ ring blowing cooling, wind speed 0.4 m / s, total stretch ratio of 2 times, heat setting temperature 115℃.

[0038] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0039] Example 5:

[0040] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is zinc-loaded porous kaolin with a porosity of 60%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​3%) were injected into a high-speed mixer and dried and mixed at 170°C for 8 hours to prepare matrix resin; TPEE was placed in an oven at 120°C and dried for 3 hours; (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 280℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 225℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinning plate, spinning plate working temperature 285℃, 25℃ ring blowing cooling, wind speed 0.5 m / s, total stretch ratio of 3 times, heat setting temperature 130℃.

[0041] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0042] Example 6:

[0043] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is copper-loaded mesoporous titanium dioxide with a porosity of 60%, the mass ratio of porous inorganic antibacterial agent to matrix is ​​5% PEN and nano copper, and the amount of nano copper added in the matrix is ​​5%) were injected into a high-speed mixer and dried and mixed at 170°C for 8 hours to prepare the matrix resin; TPEE was placed in an oven at 120°C and dried for 3 hours; (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 280℃, Screw speed 50 r / min. (3) Elastomer resin (TPU) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 225℃, Screw speed 50 r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinning plate, spinning plate working temperature 285℃, 25℃ ring blowing cooling, wind speed 0.5 m / s, total stretch ratio of 3 times, heat setting temperature 130℃.

[0044] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0045] Example 7:

[0046] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) Antibacterial PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is silver-loaded porous zeolite with a porosity of 50%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin and pore-forming agent (sodium bicarbonate, the amount of which is 5% of the matrix resin) are injected into a twin-screw extruder and melt extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 50r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 300℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0047] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0048] Example 8:

[0049] A method for preparing a peninsula-type antibacterial elastic composite fiber includes the following steps: (1) Antibacterial PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is silver-loaded porous zeolite with a porosity of 50%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin and pore-forming agent (aluminum hydroxide, 5% of the matrix resin) are injected into a twin-screw extruder and melt extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 50 r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 50r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 300℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0050] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0051] Comparative Example 1: The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 uses an antibacterial finishing agent to treat the fibers with antibacterial agents, but does not use a porous inorganic antibacterial agent. All other conditions are the same as in Example 1.

[0052] Comparative Example 2: The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 uses an inorganic antibacterial agent instead of a porous material; the inorganic antibacterial agent is nano-silver. The difference between Comparative Example 4 and Example 1 is that the porosity of the porous inorganic antibacterial agent is too small, and the following steps are included: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is nano silver, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 300r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 200r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 280℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0053] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0054] Comparative Example 3: The difference between Comparative Example 3 and Example 1 is that the porous inorganic antibacterial agent did not contain an antibacterial metal. The difference between Comparative Example 4 and Example 1 is that the porosity of the porous inorganic antibacterial agent is too small. The process includes the following steps: (1) PEN and antibacterial masterbatch (antibacterial masterbatch is PEN and porous zeolite with 30% porosity, and the mass ratio of porous zeolite to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 300r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 200r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 280℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0055] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0056] Comparative Example 4: The difference between Comparative Example 4 and Example 1 is that the porosity of the porous inorganic antibacterial agent is too small, including the following steps: (1) PEN and antibacterial masterbatch (the antibacterial masterbatch is PEN and porous inorganic antibacterial agent, the porous inorganic antibacterial agent is silver-loaded porous zeolite with a porosity of 30%, and the mass ratio of porous inorganic antibacterial agent to matrix is ​​2.5%) were injected into a high-speed mixer and dried and mixed at 165°C for 9 hours to prepare the matrix resin; TPEE was placed in an oven at 115°C and dried for 3.5 hours. (2) The matrix resin is injected into a twin-screw extruder and melt-extruded to produce molten matrix resin. The screw extruder conditions are: Zone 1 265℃, Zone 2 275℃, Zone 3 282℃, Zone 4 288℃, Die 285℃, Screw speed 300r / min. (3) The elastomer resin (TPEE) is injected into a twin-screw extruder and melt-extruded at 180~225℃ to produce melt elastomer resin. The screw extruder conditions are: Zone 1 185℃, Zone 2 195℃, Zone 3 205℃, Zone 4 215℃, Die 220℃, Screw speed 200r / min. (4) The molten matrix resin and molten elastomer resin are injected into the spinning device and spun into peninsula antibacterial elastic composite fiber. The parameters of the spinning device are: peninsula spinneret, spinneret working temperature 280℃, 22.5℃ ring air cooling, wind speed 0.45 m / s, total stretch ratio 2.5 times, heat setting temperature 125℃.

[0057] like Figure 1 As shown, the peninsula antibacterial elastic composite fiber includes a matrix and three symmetrical islands semi-embedded in the matrix. The total cross-sectional area of ​​the islands accounts for 22%, and the embedding depth of the islands is 1 / 2 of the island diameter.

[0058] The elastic properties and antibacterial durability of the antibacterial elastic composite fibers prepared in Examples 1-6 and Comparative Examples 1-5 were tested. The elasticity performance test method was conducted in accordance with the content published in "FZ / T 50058-2022 Test Method for Elasticity Performance of Two-Component Composite Filaments of Synthetic Fibers"; The antimicrobial durability test method was conducted in accordance with the content disclosed in GB / T 20944.3-2008 Evaluation of antimicrobial properties of textiles - Part 3: Shaking method. The test species were Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922), and Candida albicans (ATCC 10231). The moisture-wicking performance test method was conducted in accordance with the content disclosed in GB / T 21655-2023 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles - Part 1: Single-Item Combination Test Method". The test results are shown in Table 1; Table 1. Elastic properties and antibacterial durability of antibacterial elastic composite fibers As shown in Table 1, the peninsula antibacterial elastic composite fiber prepared by this invention has a crimp shrinkage rate of 29.4–34.5%, a crimp stability of 89.8–95.1%, a water droplet diffusion time of 2–3 s, a liquid water absorption rate of 93–99%, a water evaporation time of 0.58–0.62%, an initial antibacterial rate of 97.6–99.9%, and an antibacterial rate of 92.4–97.8% after 300 washes. These results indicate that the peninsula antibacterial elastic composite fiber prepared by this invention possesses excellent elasticity, durable antibacterial properties, and moisture absorption and wicking properties.

[0059] In Comparative Example 1, antibacterial finishing agents were used to treat the antibacterial elastic composite fiber of the peninsula. After 100 washes, the antibacterial rate dropped to 71.4%, and after 300 washes, the antibacterial rate was only 18.6%, indicating that the antibacterial performance was basically ineffective.

[0060] In Comparative Example 2, an antibacterial metal was directly used as an inorganic antibacterial agent without the use of porous materials. The results showed that only the matrix of Comparative Example 2 exhibited some antibacterial properties, while the elastic islands suffered from severe microbial contamination. Furthermore, its water diffusion time, liquid water absorption rate, and water evaporation rate were similar to those of Comparative Example 1, indicating that directly using an inorganic metal antibacterial agent did not significantly improve the moisture absorption and wicking properties of the fiber.

[0061] In Comparative Example 3, the porous material was not loaded with antibacterial metal. The results showed that the water diffusion time, liquid water absorption rate and water evaporation rate of Comparative Example 3 were basically the same as those of Example 1, but the antibacterial performance was significantly lower than that of Example 1. This indicates that porous materials can enable fiber materials to have excellent moisture absorption and drainage performance, but fibers without antibacterial metal loading do not have antibacterial effects.

[0062] The porous material used in Comparative Example 4 had too small a porosity, and its drip diffusion time, liquid water absorption rate, water evaporation time, and antibacterial performance were all significantly lower than those in Example 1. This result indicates that the porosity of the porous material affects the hygroscopic gradient between the matrix and the island. Too small a porosity will weaken the effect of water accumulation from the island to the matrix, thereby reducing the overall antibacterial effect.

[0063] This application describes immersing the antibacterial elastic composite fibers prepared in Examples 1, 7, and 8 in a bacterial solution (with a Staphylococcus aureus cell count of 10). 6 After culturing in CFU / mL for 12 hours, the bacterial count in the culture solution of Examples 7 and 8 was found to be 10. 4 CFU / mL, the number of bacteria in the culture solution after Example 1 was 10. 4 CFU / mL, it can be seen that the peninsula antibacterial elastic composite fibers prepared in Examples 1, 7 and 8 all have excellent antibacterial effects, and the antibacterial effect of the peninsula antibacterial elastic composite fibers after the matrix resin is treated with a pore-forming agent is further enhanced.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A peninsula-type antibacterial elastic composite fiber, characterized in that, It includes a matrix and islands semi-embedded in the matrix. The matrix is ​​a rigid resin and a porous inorganic antibacterial agent. The islands are elastomeric resins. The rigid resin is polyethylene naphthalate, and the elastomeric resin is one or more of thermoplastic polyester elastomers and thermoplastic polyurethane elastomers.

2. The peninsula antibacterial elastic composite fiber according to claim 1, characterized in that, The porous inorganic antibacterial agent is a porous material loaded with antibacterial metal. The porous material is one or more of zeolite, mesoporous silica, porous kaolin, and mesoporous titanium dioxide, and the porosity of the porous material is 45-65%.

3. The peninsula antibacterial elastic composite fiber according to claim 1 or 2, characterized in that, The amount of porous inorganic antibacterial agent added to the matrix is ​​1-5%.

4. The peninsula antibacterial elastic composite fiber according to claim 1, characterized in that, The cross-sectional area of ​​the island accounts for 20-40%, and the inlay depth of the island is 1 / 3 to 1 / 2 of the island's diameter.

5. The peninsula antibacterial elastic composite fiber according to claim 1, characterized in that, The rigid resin is a porous resin, and the raw materials for the porous resin are antibacterial polyethylene naphthalate and a porogen.

6. A method for preparing peninsula antibacterial elastic composite fiber according to any one of claims 1 to 5, characterized in that, Includes the following steps: (1) The rigid resin is mixed with an inorganic antibacterial agent and dried to prepare a matrix resin; (2) Melt extrusion of matrix resin and elastomer resin to obtain molten matrix resin and molten elastomer resin; (3) The molten matrix resin and molten elastomer resin are injected into the spinneret to form peninsula antibacterial elastic composite fiber.

7. The preparation method according to claim 6, characterized in that, The conditions for blending and drying in step (1) include: temperature 160~170℃, time 8~10h.

8. The preparation method according to claim 6, characterized in that, The melt extrusion temperature of the matrix resin is 280~290℃, and the melt extrusion temperature of the elastomer resin is 180~225℃.

9. The preparation method according to claim 6 or 8, characterized in that, The melt index matching ratio of the matrix resin and the elastomer resin is 1.5~2.2:

1.

10. The preparation method according to claim 6, characterized in that, The spinneret uses a peninsula spinneret.

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