Composite fiber, antibacterial fabric and car seat back storage bag

Abstract

The invention discloses a composite fiber, an antibacterial fabric and a car seat back storage bag, the composite fiber adopts a twisted yarn structure, and the composite fiber is formed by twisting one strand of antibacterial fiber filament, one strand of mudar floss filament and three strands of polyethylene fiber filament on an aramid fiber filament in the same direction. According to the invention, the addition of the antibacterial fiber filaments provides an antibacterial function for the composite fiber, and cooperates with the antibacterial performance of the calotropis gigantean fiber filaments, so that the antibacterial effect of the composite fiber is synergistically enhanced, and the breeding of bacteria and molds is reduced. The ultra-high molecular weight polyethylene fiber (UHMWPE) has extremely high wear resistance and low friction coefficient, and the wear resistance of the ultra-high molecular weight polyethylene fiber is superior to that of many traditional fibers. The twisting process is combined with the aramid fiber filaments, so that the wear resistance of the composite fiber is further enhanced. The aramid fiber filaments have high strength and high modulus and can provide stable structural support for the composite fiber, and the overall wear resistance is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of high-performance composite fibers, and in particular to a composite fiber, an antibacterial fabric, and a vehicle seat back storage bag. Background Art

[0002] Car storage bags: usually used in the sun visor, behind the backrest, on the side of the door, and in the trunk of the car. According to the subdivision, they are usually called differently, such as: car storage bag, car storage box, storage hanging bag, car storage bag, car storage bag.

[0003] The utility model with announcement number CN218805541U discloses a non-woven storage bag for a car seat back, including a storage bag body and straps. There are multiple groups of straps, which are respectively arranged on the upper and lower parts of the storage bag body. A support plate is provided on the upper part of the storage bag body, a water cup storage bag is provided on the lower part of the support plate, and a tissue storage bag is provided on one side of the water cup storage bag.

[0004] However, with the popularity of vehicles, people enjoy the fun of driving, but long-term driving will inevitably lead to thirst, hunger, etc., especially the passengers in the back row are in a state of mental relaxation for a long time, so they will carry some tea, snacks, etc. The storage bag on the back of the car seat provides a good storage function.

[0005] However, there are many problems with the storage bags made of non-woven fabrics in the prior art. Although non-woven fabrics have good moisture absorption, air permeability and softness, they have poor antibacterial properties and are prone to breeding bacteria. During use, bacteria on the surface of non-woven fabrics will adhere for a long time. The problem of bacterial breeding not only affects the service life of the storage bag, but also poses a potential threat to the health of people in the car. Summary of the invention

[0006] In order to overcome the above technical defects, the present invention provides a composite fiber, an antibacterial fabric, and a vehicle seat back storage bag.

[0007] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0008] In a first aspect, the present invention provides a composite fiber, which adopts a twisted yarn structure, and the composite fiber is one strand of antibacterial fiber filament, one strand of melon fiber filament, and three strands of polyethylene fiber filament twisted in the same direction on an aramid fiber filament.

[0009] Preferably, the product specification of the kiwano fiber filament is 20tex / 150f.

[0010] Preferably, the product specification of the antibacterial fiber filament is 50tex / 48f, and the antibacterial fiber filament is made by spinning polyacrylonitrile fiber containing nano copper and zinc oxide.

[0011] Preferably, the product specification of the polyethylene fiber filament is 22.22tex / 198f.

[0012] Preferably, the product specification of the aramid fiber filament is 131.11tex / 667f.

[0013] Preferably, the aramid fiber filaments are CNT-modified aramid fiber filaments, and the aramid fiber filaments are prepared by the following modification method:

[0014] (1) Cleaning:

[0015] The aramid fiber filaments were immersed in an acetone solution and subjected to ultrasonic treatment for 30 minutes; then rinsed with deionized water for 3-5 times, placed in a vacuum oven, vacuum dried at 60°C for 4 hours, taken out, and sealed for storage;

[0016] (2) Preparation of modified solution:

[0017] A Tris buffer reagent is prepared by using a dilute hydrochloric acid solution and tris(hydroxymethyl)aminomethane particles, and the Tris buffer is slowly added to a dopamine-HCL solution with a concentration of 2 g / L for multiple times, and the pH is adjusted to 8.5 to obtain a dopamine solution; then, 0.13% by mass of hydroxy carbon nanotube powder CNT is dissolved in anhydrous ethanol solution, and the mass ratio of the hydroxy carbon nanotube powder CNT to ethanol is 5:95, and after ultrasonic dispersion for 1-2 hours, the mixture is added to the dopamine solution, and the mixture is fully stirred and mixed to obtain a modified solution;

[0018] (3) Modification treatment:

[0019] The washed aramid fiber filaments are completely immersed in the modification solution, immersed at room temperature for 24 hours, and then rinsed with deionized water for 3-5 times; finally, dried in a vacuum oven at 60°C for 2 hours to obtain CNT-modified aramid fiber filaments.

[0020] In a second aspect, the present invention further provides an antibacterial fabric, which is woven from the composite fiber described in the first aspect.

[0021] Preferably, the antibacterial fabric adopts a warp knitted structure.

[0022] In a third aspect, the present invention further provides a vehicle seat back storage bag, which is made of textile fabrics, and the textile fabrics include the antibacterial fabrics described in the second aspect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The invention provides a composite fiber, which adopts a twisted yarn structure. The composite fiber comprises one strand of antibacterial fiber filament, one strand of kiwano fiber filament and three strands of polyethylene fiber filament, which are twisted in the same direction on aramid fiber filament.

[0025] In the present invention, the addition of antibacterial fiber filaments provides antibacterial function for the composite fiber, synergizes with the antibacterial properties of the kiwano fiber filaments, synergistically enhances the antibacterial effect of the composite fiber, and reduces the growth of bacteria and mold. Ultra-high molecular weight polyethylene fiber (UHMWPE) has extremely high wear resistance and low friction coefficient, and its wear resistance is better than many traditional fibers. The wear resistance of the composite fiber is further enhanced by combining it with aramid fiber filaments through a twisting process. The aramid fiber filaments themselves have high strength and high modulus, which can provide stable structural support for the composite fiber and enhance the overall wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 The warp knitted structure of the antibacterial fabric of the present invention;

[0028] Figure 2 The present invention is a three-dimensional view of a baby seat cushion of a car seat back storage bag when it is opened.

[0029] 1-computer bag, 2-storage box, 3-infant seat cushion, 31-flange, 32-infant seat cushion fixing belt. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] like Figure 1 As shown, the preferred structure of the composite fiber, antibacterial fabric, and car seat back storage bag described in the present invention.

[0032] The invention provides a composite fiber, which adopts a twisted yarn structure. The composite fiber comprises one strand of antibacterial fiber filament, one strand of kiwano fiber filament and three strands of polyethylene fiber filament, which are twisted in the same direction on aramid fiber filament.

[0033] In the present invention, the addition of antibacterial fiber filaments provides antibacterial function for the composite fiber, synergizes with the antibacterial properties of the kiwano fiber filaments, synergistically enhances the antibacterial effect of the composite fiber, and reduces the growth of bacteria and mold. Ultra-high molecular weight polyethylene fiber (UHMWPE) has extremely high wear resistance and low friction coefficient, and its wear resistance is better than many traditional fibers. The wear resistance of the composite fiber is further enhanced by combining it with aramid fiber filaments through a twisting process. The aramid fiber filaments themselves have high strength and high modulus, which can provide stable structural support for the composite fiber and enhance the overall wear resistance.

[0034] Antibacterial fiber filaments are an important component of composite fibers, and their antibacterial properties mainly come from the antibacterial agents on the fiber surface or inside. These antibacterial agents can contact with bacterial cell membranes, destroy the integrity of the cell membrane, and thus inhibit the growth and reproduction of bacteria. The kiwano fiber itself has certain antibacterial properties, and its antibacterial mechanism may be related to the chemical composition of the fiber surface. The natural antibacterial components in the kiwano fiber can synergize with the antibacterial agents in the antibacterial fiber filaments to further enhance the antibacterial effect of the composite fiber. This synergistic effect can effectively reduce the growth of bacteria and mold and improve the overall antibacterial properties of the composite fiber. UHMWPE fiber has a hydrophobic and smooth surface, which makes it difficult for bacteria to attach and grow on its surface. In addition, the high wear resistance and low friction coefficient of UHMWPE fiber can reduce the wear of the fiber during use, thereby extending its service life.

[0035] On the other hand, common natural fibers or single fibers have poor wear resistance, so some synthetic fibers with better performance can be introduced to improve the performance of fabrics by combining the strengths of both fibers. To this end, the composite fiber of the present invention combines the excellent wear resistance and impact resistance of polyethylene fibers and aramid fibers, can effectively resist external friction and impact, extend the service life of the composite fiber, and achieve excellent wear resistance. At the same time, the softness and comfort of the composite fiber will not be affected by high performance requirements.

[0036] In this field, twisting is a common yarn processing method. By twisting multiple fiber filaments in the same direction, the fibers can be tightly bound together. This structure can significantly improve the strength, wear resistance and fatigue resistance of the fiber. At the same time, twisting can also give the fiber a certain elasticity, so that it can better disperse stress when subjected to force and reduce local damage. This structure makes the arrangement between fibers more compact, enhancing the integrity and consistency of the fibers. The synergistic effect of multiple fibers can improve the comprehensive performance of the composite fiber.

[0037] The twisting process not only enhances the mechanical properties of the yarn, but also optimizes the antibacterial properties. Through twisting, the antibacterial fiber filaments and the kiwano fiber filaments are tightly wound around the aramid fiber filaments, making the antibacterial fibers more evenly distributed on the surface.

[0038] In a specific implementation, the product specification of the kiwano fiber filament is 20tex / 150f.

[0039] In the present invention, the kiwano fiber filaments are obtained by spinning the seed pappus fibers in the fruit. The cross-section has a high hollowness (80% to 90%), a smooth longitudinal surface, a breaking strength of 4.45 cN / dtex, an elongation at break of 3.40%, and a moisture regain of 11.90%, and has good hygroscopicity and warmth retention. Specifically, the pretreated kiwano fibers are opened and combed to form uniform fiber strips. The fiber strips are spun into yarns through spinning processes such as ring spinning or air spinning. The hollow structure and soft properties of kiwano fibers require special attention to tension control during the spinning process. The spun kiwano fiber filaments can be further twisted, shaped, and other treatments to improve the strength and stability of the yarn.

[0040] In the present invention, the product specification of the antibacterial fiber filament is 50tex / 48f, and the antibacterial fiber filament is made by spinning polyacrylonitrile fiber with nano copper and zinc oxide. The present invention disperses Cu-ZnO NPs on polyacrylonitrile PAN through centrifugal-electrospinning technology to prepare antibacterial fiber Cu-ZnO / PAN. The specific implementation method is as follows:

[0041] (1) Preparation and synthesis of 5 wt% Cu-ZnO NPs by in situ reduction method: ZnO NPs (2.00 g) were ultrasonically dispersed in 50 ml of deionized water for 30 min to obtain a uniform ZnO NPs suspension, and CuCl2·2H2O (0.27 g) was weighed and dissolved in 50 ml of deionized water to obtain a CuCl2·2H2O solution. The three-necked flask containing ZnO NPs and CuCl2·2H2O solution was heated to 80°C in a magnetically stirred oil bath, and 50 mL of L-ascorbic acid aqueous solution (the molar ratio of CuCl2·2H2O: L-ascorbic acid was 1:4) was added dropwise into the flask while stirring. The mixed solution was refluxed and condensed at 80°C for 20 h to obtain a dark brown solution. The obtained product was washed several times with anhydrous ethanol and deionized water, then centrifuged and freeze-dried to obtain a 5 wt% Cu-ZnONPs composite antibacterial agent.

[0042] (2) Preparation of 10% PAN solution: Weigh 1.57 g PAN into a 20 ml sample bottle, add 15 ml DMF, and disperse by ultrasonic in an ultrasonic disperser. Finally, seal and stir magnetically for 24 h to obtain a transparent and uniform viscous solution.

[0043] (3) Weigh different masses of Cu-ZnO NPs composite antibacterial agent (the mass fraction of Cu-ZnO NPs is 3.8%), add them into a sample bottle containing 15 ml of DMF solution, seal it, and ultrasonically disperse it in an ultrasonic disperser for 30 min to obtain a uniformly dispersed solution. Pour 1.57 g of PAN into the above Cu-ZnO / DMF mixed solution, seal it with a sealing film and stir it magnetically for 24 h at room temperature to obtain a light yellow spinning solution.

[0044] (4) The spinning solution was spun by centrifugal-electrospinning technology, and the spinning parameters were as follows: spinning voltage was 12 kV, spinning speed was 3000 rpm, receiving distance was 11 cm, and spinning needle was 27 G. Cu-ZnO / PAN fiber was obtained. After spinning, cooling, oiling, drawing and shaping were performed, and finally the antibacterial fiber filament was wound.

[0045] Antibacterial fiber filament product experiment

[0046] (I) According to the antibacterial test method specified in GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", the antibacterial properties of antibacterial fiber filaments were evaluated by measuring the proliferation of bacterial colonies using the plate counting method.

[0047] After the antibacterial fiber filaments and bacteria were co-cultured for 18 hours, most of the bacteria had died, and the inhibition rate still reached more than 98%, indicating that the fiber has excellent antibacterial properties.

[0048] (ii) Refer to the simplified washing conditions and procedures in Appendix C of FZ / T 73023-2006 “Antibacterial Knitwear” and perform standard washing on the antibacterial fiber filament samples.

[0049] The bacterial proliferation before and after washing, the number of bacterial colonies in the sample did not increase significantly, and the antibacterial performance of the fiber did not show a significant downward trend with the increase in the number of washings. According to the colony counting method, the corresponding antibacterial rate was calculated. After the fiber was washed 50 times, the antibacterial rate still reached 97% and above, indicating that the antibacterial fiber filament has good washability.

[0050] In a preferred embodiment, the product specification of the polyethylene fiber filament is 22.22tex / 198f. The polyethylene fiber filament of the present invention belongs to ultra-high molecular weight polyethylene fiber (UHMWPE), which has extremely high strength and modulus. It has excellent impact resistance, cut resistance, high wear resistance, chemical corrosion resistance, good flexibility and low density. The flexibility of polyethylene fiber makes the composite fiber have good flexibility and fatigue resistance, can maintain integrity during repeated bending and stretching, and is suitable for application scenarios of textile products that require frequent deformation.

[0051] In the present invention, the product specification of the aramid fiber filament is 131.11tex / 667f. 131.11tex means that the weight of each 1000 meters of fiber is 131.11 grams. 667f means that the fiber is composed of 667 single filaments. This structure with a high number of single filaments can improve the overall strength and wear resistance of the fiber.

[0052] In a preferred implementation, the aramid fiber filaments are CNT-modified aramid fiber filaments.

[0053] CNT has extremely high strength and modulus. By combining with aramid fiber, the mechanical properties of the fiber can be significantly improved. For example, studies have shown that after CNT is combined with aramid nanofibers, the composite structure formed can effectively disperse stress and prevent premature fracture caused by stress concentration. In addition, the modified aramid fiber exhibits higher fracture strength and modulus during stretching. At the same time, the surface of aramid fiber originally lacks chemically active groups, resulting in low interfacial bonding strength with the matrix material. CNT modification can improve the overall performance of the composite material by increasing the active sites on the fiber surface and improving its wettability and interfacial bonding strength with the matrix material. The high aspect ratio and excellent mechanical properties of CNT enable it to be evenly dispersed in the composite fiber and effectively dissipate energy when subjected to external force. This modification method significantly improves the impact resistance and wear resistance of aramid fiber, making it more durable in high stress and high wear environments.

[0054] In a specific implementation, the aramid fiber filament is prepared by the following modification method:

[0055] (1) Cleaning:

[0056] The aramid fiber filaments were immersed in an acetone solution and subjected to ultrasonic treatment for 30 minutes; then rinsed with deionized water for 3-5 times, placed in a vacuum oven, vacuum dried at 60°C for 4 hours, taken out, and sealed for storage;

[0057] (2) Preparation of modified solution:

[0058] A Tris buffer reagent is prepared by using a dilute hydrochloric acid solution and tris(hydroxymethyl)aminomethane particles, and the Tris buffer is slowly added to a dopamine-HCL solution with a concentration of 2 g / L for multiple times, and the pH is adjusted to 8.5 to obtain a dopamine solution; then, 0.13% by mass of hydroxy carbon nanotube powder CNT is dissolved in anhydrous ethanol solution, and the mass ratio of the hydroxy carbon nanotube powder CNT to ethanol is 5:95, and after ultrasonic dispersion for 1-2 hours, the mixture is added to the dopamine solution, and the mixture is fully stirred and mixed to obtain a modified solution;

[0059] (3) Modification treatment:

[0060] The washed aramid fiber filaments are completely immersed in the modification solution, immersed at room temperature for 24 hours, and then rinsed with deionized water for 3-5 times; finally, dried in a vacuum oven at 60°C for 2 hours to obtain CNT-modified aramid fiber filaments.

[0061] 1. Experiment of aramid fiber filament

[0062] (1) Fiber surface morphology analysis: A Phenom desktop scanning electron microscope (SEM) was used to characterize the microscopic surface changes of a single aramid fiber before and after modification.

[0063] The dopamine solution is added with 0.13% CNT to modify the aramid fiber filaments. The carbon nanotubes doped in the dopamine coating on the fiber surface make the polydopamine coating densely cover the fiber, and the granular protrusions are reduced. Due to the addition of nanofillers, the oxidation self-polymerization of dopamine on the fiber surface is assisted and guided, so that the original polydopamine polymerization points are dispersed, and the coating is more uniform and dense.

[0064] (2) Yarn strength test: The yarn strength test refers to GB / T19975-2005 Test method for tensile properties of high-strength filament yarns, and the strength test is carried out on the aramid yarn before and after modification.

[0065] The tensile load of the modified aramid fiber is significantly higher than that of the unmodified aramid fiber. This is because the aramid fiber has a skin-core structure, and the main load-bearing part is the core layer. The dopamine coating is attached to the fiber surface, which does not affect the original mechanical structure of the aramid fiber, and forms a protective layer on the fiber surface, which disperses part of the load when tensile force is applied, thereby improving the fiber's load-bearing capacity. After CNT doping, the density of the coating is increased, and the coating area applied on the fiber surface is increased, so the tensile load that can be carried is significantly increased, and the overall strength of the aramid filament is increased. The maximum tensile load is increased by 38.57%.

[0066] (4) Fiber surface hydrophilicity test

[0067] The contact angle test was carried out using the insertion method. The fiber was suspended vertically and slowly inserted into a horizontal liquid surface to obtain the fiber surface contact angle and calculate the fiber surface free energy.

[0068] The surface contact angle of the unmodified aramid fiber is 95°, which is hydrophobic, the fiber surface is smooth and flat, and the surface free energy is low. After adding CNT, the contact angle of the fiber is significantly reduced and the surface free energy is increased, which proves that after doping with CNT, it is more conducive to the adhesion of the PDA coating on the fiber surface, the coating is more uniform and dense, the density of active groups is increased, and the wetting performance is significantly enhanced.

[0069] (5) Fiber extraction force test

[0070] Epoxy resin (GCC-135) and curing agent (GCC137) were mixed at a mass fraction of 100:30. The aramid fiber was inserted into a cylindrical tubular mold with a length of 1 mm, and the mixed resin was injected into the mold and cured for 24 hours to complete the single-filament extraction test sample of the aramid fiber.

[0071] Compared with the unmodified aramid fiber, the interface shear strength of the modified aramid fiber increased by 2.95%. The interfacial bonding performance between the fiber and the resin was significantly improved. This is because after the carbon nanotubes were introduced into dopamine, they acted as nanofillers to guide the dopamine to polymerize into a denser coating on the surface of the aramid fiber. The fiber surface was evenly coated, the active groups increased, and the connection sites between the fiber and the resin increased, forming a strong connection.

[0072] On the other hand, the same-direction twisting method has higher breaking strength and breaking elongation in terms of mechanical properties. The product performance of the composite fiber is shown in the following table.

[0073]

[0074] Based on the above composite fiber, the present invention also provides an antibacterial fabric, which is woven from the composite fiber. The antibacterial fabric has the properties of the above composite fiber. The antibacterial fabric has the excellent properties of the composite fiber, has a significant antibacterial effect (the antibacterial rate against Staphylococcus aureus and Escherichia coli can reach more than 99%, and has good water washability), and has a high breaking strength (5.33cN / tex) and good comfort and breathability.

[0075] On the other hand, due to the excellent antibacterial properties, high strength and wear resistance of the composite fiber, the fabric is not easy to wear in a high friction environment, and the service life is significantly extended. The synergistic effect of the polyethylene fiber and the CNT modified layer allows the fabric to be used repeatedly for a long time, extending its service life.

[0076] In a preferred embodiment, the antibacterial fabric adopts a warp knitted structure. Figure 1 As shown in the figure, the warp knitted structure can increase the contact points between fibers through high-density coil arrangement, thereby improving the wear resistance of the fabric. Warp knitted fabrics have good elasticity and can adapt to complex movements and deformations while maintaining high wear resistance. On the other hand, the surface of the warp knitted structure is more uniform, which can better disperse friction and reduce local wear. Through the combination of specific organizational structures and yarns, the wear resistance of the fabric is synergistically improved.

[0077] In a preferred embodiment, the antibacterial fabric is treated with a wear-resistant coating, and the thickness of the antibacterial fabric is 0.13-0.2 mm. Coating a layer of wear-resistant resin on the surface of the fabric is the simplest and most effective method to improve wear resistance. Adding wear-resistant fillers to the resin and coating it on the surface of the fabric protects the fabric during friction, thereby significantly improving the wear resistance of the fabric.

[0078] Specifically, the wear-resistant coating treatment includes the following steps:

[0079] 100g of titanium boride particles and 12.5g of ethanol thickener were added to 5000g of silicone resin solution, and stirred at room temperature with a magnetic stirrer at a stirring speed of 2000rpm for 30min. After stopping stirring, the solution was coated on the antibacterial fabric and dried at 80℃ for 6h.

[0080] In this technology, titanium boride particles have excellent performance, high hardness and excellent wear resistance. Silicone resin is a polymer material that combines good film-forming properties, hydrophobic properties, gloss properties, weather resistance, scratch resistance and corrosion resistance. Titanium boride particles are well dispersed in silicone resin, and a coating with excellent performance can be obtained.

[0081] Product experiment: test antibacterial fabric, antibacterial fabric treated with pure silicone resin coating, and antibacterial fabric treated with wear-resistant coating. The experimental method and results are as follows.

[0082] 1. The wear resistance of the fabric surface is mainly measured by measuring the wear of the fabric surface. First, cut the coated fabric into a circle with a radius of 12 cm, leaving a small hole in the middle, clean it, and the mass after drying is m0. After coating and drying, the mass is m1. The wear resistance test is carried out. The mass after 100, 300, 500, 1000, 1500 and 2000 times of wear is m2. The wear amount is calculated as:

[0083]

[0084] The calculation formula for the coating amount is: m=m1-m0. The friction times when the first yarn breaks are recorded as the wear times.

[0085] The two coated fabrics have the best wear resistance, which is because the organic silicon resin itself is a resin with excellent wear resistance. The coating contains resin, so the lower the wear rate, the better the wear resistance. The wear resistance of the fabric coated with the organic silicon resin with titanium boride particles is better than that of the pure organic silicon resin coating. This is because titanium boride itself has excellent wear resistance. When it is added to the organic silicon resin system, it can be used as an auxiliary reinforcement, which greatly improves the wear resistance of the entire system. When an appropriate amount of titanium boride particles is added, the wear rate of the coated fabric is higher than that of the pure organic silicon resin coated fabric. This is because the presence of titanium boride particles destroys the good film-forming properties of the organic silicon resin. When the grinding wheel is strongly rubbed, due to poor film formation, the wear probability of the film increases, and the wear rate increases accordingly. Under the same number of frictions, the wear resistance of the antibacterial fabric is lower than that of the antibacterial fabric treated with pure organic silicon resin coating and the antibacterial fabric treated with wear-resistant coating.

[0086] 2. According to national standards, cut the fabric samples into the specified size and use the HD026N electronic fabric strength tester to test the breaking strength of the fabric. Before testing, calibrate the instrument and test the warp strength of the fabric.

[0087] The experimental results show that the tensile breaking strength of antibacterial fabrics treated with pure silicone resin coating and antibacterial fabrics treated with wear-resistant coating are far superior to that of ordinary antibacterial fabrics.

[0088] Due to the presence of resin, the coating viscosity increases, the coating thickness increases, the thickness of the coated fabric increases, and the tensile breaking strength increases. The tensile breaking strength of the coated fabric with titanium boride is less than that of pure silicone resin, and the tensile breaking strength of the coated fabric with titanium boride is not much different from that of pure silicone resin.

[0089] At the same time, as the content of silicone resin increases, the tensile strength at break increases. This is because the presence of the resin increases the viscosity of the coating, the thickness of the coating increases, the thickness of the coated fabric increases, and the tensile strength at break increases.

[0090] The present invention also provides a storage bag for the back of a vehicle seat. The storage bag for the back of a vehicle seat is made of textile fabric, and the textile fabric is the antibacterial fabric mentioned above.

[0091] In a specific implementation, the car seat back storage bag includes a storage bag body, which is made of the above-mentioned antibacterial fabric and is in a plate shape, and has good antibacterial and durability. A plastic plate can be provided inside the storage bag body to enhance hardness. A plurality of functional storage pockets are provided on one side of the storage bag body, including:

[0092] Tablet pocket: One side is transparent for easy viewing of the screen, the opening is hidden at the back, and there is a rib at the opening to prevent items from slipping out.

[0093] Mesh bag: used to place small items, with an elastic band at the top opening to adjust the opening size.

[0094] Sundry bag: Flat design, with an opening on the upper front side and a zipper or Velcro at the opening for easy removal and cleaning.

[0095] The storage bag body has a fixing device and is firmly installed on the back of the car seat through the following fixing devices:

[0096] Headrest fixing strap: includes two fixing straps, which are respectively connected to the left and right ends of the top of the storage bag body, and are fixed between the seat headrest and the seat back through buckles or Velcro.

[0097] Seat fixing straps: including two fixing straps, which are respectively connected to the left and right lower ends of the storage bag body, and are fixed between the seat back and the seat through buckles or Velcro.

[0098] In a specific implementation, Figure 2 As shown, the car seat back storage bag of the present invention includes a main body, and a plurality of storage bags are arranged on the main body. Among them, a computer bag 1 is arranged at the bottom of the main body. Two storage boxes 2 are arranged above the computer bag. In the main innovation of this technology, the main body is provided with a baby cushion 3, and a flange 31 is arranged on the edge of the inner surface of the baby cushion 3, and a baby cushion fixing belt 32 is arranged next to the flange 31. When the baby cushion 3 needs to be used, the buckle is opened and the length of the baby cushion fixing belt 32 is adjusted to make the angle of the baby cushion 3 suitable.

[0099] In a preferred embodiment, a tissue box and a net bag are arranged on the back of the baby cushion 3, and the tissue box and the net bag are arranged side by side and at intervals.

[0100] For other structures of the composite fiber, antibacterial fabric, and car seat back storage bag described in this embodiment, refer to the prior art.

[0101] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A composite fiber, characterized in that: The composite fiber adopts a twisted yarn structure, and the composite fiber is composed of one strand of antibacterial fiber filament, one strand of kiwano fiber filament, and three strands of polyethylene fiber filament twisted in the same direction on the aramid fiber filament.

2. A composite fiber according to claim 1, characterized in that: The product specification of the kiwano fiber filament is 20tex / 150f.

3. A composite fiber according to claim 1, characterized in that: The product specification of the antibacterial fiber filament is 50tex / 48f, and the antibacterial fiber filament is made by spinning polyacrylonitrile fiber containing nano copper and zinc oxide.

4. A composite fiber according to claim 1, characterized in that: The product specification of the polyethylene fiber filament is 22.22tex / 198f.

5. A composite fiber according to claim 1, characterized in that: The product specification of the aramid fiber filament is 131.11tex / 667f.

6. A composite fiber according to claim 5, characterized in that: The aramid fiber filaments are CNT-modified aramid fiber filaments, and the aramid fiber filaments are prepared by the following modification method: (1) Cleaning: The aramid fiber filaments were immersed in an acetone solution and subjected to ultrasonic treatment for 30 minutes; then rinsed with deionized water for 3-5 times, placed in a vacuum oven, vacuum dried at 60°C for 4 hours, taken out, and sealed for storage; (2) Preparation of modified solution: A Tris buffer reagent is prepared by using a dilute hydrochloric acid solution and tris(hydroxymethyl)aminomethane particles, and the Tris buffer is slowly added to a dopamine-HCL solution with a concentration of 2 g / L for multiple times, and the pH is adjusted to 8.5 to obtain a dopamine solution; then, 0.13% by mass of hydroxy carbon nanotube powder CNT is dissolved in anhydrous ethanol solution, and the mass ratio of the hydroxy carbon nanotube powder CNT to ethanol is 5:95, and after ultrasonic dispersion for 1-2 hours, the mixture is added to the dopamine solution, and the mixture is fully stirred and mixed to obtain a modified solution; (3) Modification treatment: The washed aramid fiber filaments are completely immersed in the modification solution, immersed at room temperature for 24 hours, and then rinsed with deionized water for 3-5 times; finally, dried in a vacuum oven at 60°C for 2 hours to obtain CNT-modified aramid fiber filaments.

7. An antibacterial fabric, characterized in that: The antibacterial fabric is woven from the composite fiber described in claim 6.

8. The antibacterial fabric according to claim 7, characterized in that: The antibacterial fabric adopts a warp knitted structure.

9. A storage bag for the back of a car seat, characterized in that: The car seat back storage bag is made of textile fabric, and the textile fabric includes the antibacterial fabric described in claim 8.

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