Cut-resistant melt-spun multifunctional composite fiber and manufacturing method and application of the same

Abstract

To provide a cut-resistant melt-spun multifunctional composite fiber and a manufacturing method and application of the same.SOLUTION: Porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers are used as a composite functional base material, and the porous zeolite has a larger stress field due to the special crystal structure in the fiber, resulting in higher adsorption performance for water vapor molecules in the environment. The carbon nanotubes have excellent electrical conductivity, and thus can provide an antistatic effect to the fiber, and the tubular structure thereof effectively reduces the density of the material, thereby achieving weight reduction of the fiber. The ultra-high molecular weight polyethylene microfibers selected in the present invention improve the strength and performance stability of the fiber and can produce a synergistic effect with the porous zeolite and carbon nanotubes, thereby diversifying the functions of the obtained fiber product.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention belongs to the technical field of cut-resistant fibers, and particularly relates to cut-resistant melt-spun multifunctional composite fibers and their manufacturing methods and applications. [Background technology]

[0002] In the field of modern engineering and technology, the applications of cut-resistant fibers are becoming more widespread, especially in various fields such as safety protection, aerospace, automobile manufacturing, marine industry, and sporting goods. In these fields, high requirements are placed on materials with strength, durability, and light weight, and cut-resistant fibers are preferred due to their excellent physical properties. However, currently, ultra-high molecular weight fiber (UHMWF) is mainly selected as the base material for cut-resistant fibers, which not only increases costs but also makes the production process complicated and difficult to control.

[0003] Ultra-high molecular weight fibers occupy a leading position in the cut-resistant fiber market due to their excellent mechanical properties and cut resistance. However, the production costs of such fibers are very high due to the complex manufacturing process and strict production conditions. In addition, the production process of ultra-high molecular weight fibers requires high-precision equipment and technical support. Due to the special characteristics of ultra-high molecular weight fibers, the production process is difficult to control and often requires specific temperature and pressure conditions, which further increases the production costs and difficulty.

[0004] Cut-resistant textile products that rely on ultra-high molecular weight fibers have problems with cost and difficulty of production, as well as a lack of functionality. The cut-resistant fibers produced are limited by the properties of the ultra-high molecular weight fibers themselves and often only have a single cut resistance property, lacking other multifunctional properties such as antistatic properties, fire resistance, and heat resistance. This limitation limits the application of cut-resistant fibers to more fields, especially where stricter material performance requirements exist, such as industrial production and military equipment in high-temperature environments. Summary of the Invention

[0005] The purpose of this section is to generally describe some aspects of embodiments of the present invention and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section and in the abstract and title of this application so as not to obscure the purpose of this section, the abstract, and the title, and such simplifications or omissions are not intended to limit the scope of the present invention.

[0006] In view of the above and / or the problems existing in the prior art, the present invention has been proposed.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to overcome the deficiencies in the prior art and provide a cut-resistant melt-spun multi-functional bicomponent fiber.

[0008] In order to solve the above technical problems, the present invention provides the following technical solution: The melt-spun multifunctional composite fiber has a flexible network structure, (i) porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers are used as composite functional substrates, and ordinary melt-spun fibers are used as the main fiber substrate; (ii) The total content of the multifunctional substrate in the melt-spun multifunctional composite fiber is 0.5% to 10%.

[0009] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber of the present invention, the ratio of the amount of ultra-high molecular weight polyethylene microfibers to the total amount of porous zeolite and carbon nanotubes in the multifunctional substrate is 2 to 5:1.

[0010] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the ratio of the amount of porous zeolite to the amount of carbon nanotubes used in the multifunctional substrate is 1-3:1.

[0011] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber described in the present invention, the ultra-high molecular weight polyethylene microfiber has a diameter of 2 to 4 μm, a length of 20 to 40 μm, a molecular polymerization degree of 1.5 million to 3 million, and a melting point of 130 to 136°C.

[0012] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the particle size of the porous zeolite is 2000 to 2500 mesh.

[0013] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the carbon nanotubes have a diameter of 2-4 nm, a length of 20-40 μm, and a volume resistivity of ≦100Ω.

[0014] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the conventional melt-spun fiber comprises any one of polyester, polyethylene fiber, polypropylene, and nylon.

[0015] It is a further object of the present invention to provide a method for producing cut-resistant melt-spun multi-functional bicomponent fibers.

[0016] In order to solve the above technical problems, the present invention provides the following technical solution: The melt-spun multifunctional composite fiber is obtained by blending base particles A containing porous zeolite and carbon nanotubes with base particles B containing ultra-high molecular weight polyethylene microfibers, followed by melt spinning the blend; a step of uniformly mixing base particles A, base particles B, and carrier particles at 50 to 70°C to obtain blended particles, wherein the carrier particles include either PET particles or polypropylene particles, and the total amount of composite functional substrates contained in base particles A and base particles B relative to the total amount of melt-spun multifunctional composite fibers is controlled to 0.5% to 10%, and the content of ultra-high molecular weight polyethylene microfibers in base particles B relative to the total amount of composite functional substrates is controlled to 50 to 85%; The blend particles are added to a polymer hopper, extruded at 250-300°C using a twin-screw extruder, cooled, drawn, and wound up to obtain a finished filament, wherein the cooling blow temperature is 17-21°C, the cooling blow speed is 0.4-0.5 m / s, the draw ratio is 4-5 times, and the winding tension is 20-30 cN.

[0017] In a preferred embodiment of the method for producing the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the method for producing the base particles A is as follows: The method includes the steps of: stirring and heating carrier particles, porous zeolite powder, and carbon nanotube powder to mix them at 50-70°C; feeding the resulting mixed material into a twin-screw extruder, extruding it at 250-300°C, and then cooling, drying, granulating, and sieving to obtain base particles A, wherein the total content of the porous zeolite and the carbon nanotubes is 10-20% of the base particles A, and the ratio of the amount of the porous zeolite to the amount of the carbon nanotubes used is 2:1-3; The method for producing the base particles B is as follows: The method includes the steps of: stirring and heating the carrier particles and the ultra-high molecular weight polyethylene microfiber powder to mix them at 30-50°C; feeding the resulting mixed material into a twin-screw extruder and extruding it at 80-100°C; and then cooling, drying, granulating, and sieving the resulting material to obtain base particles A, wherein the total content of the ultra-high molecular weight polyethylene microfibers is 5-15% of the total content of the base particles B; The carrier particles include one of PET particles and polypropylene particles.

[0018] A further object of the present invention is to provide an application of cut-resistant melt-spun multi-functional composite fibers to the manufacture of cut-resistant fabrics. [Effects of the Invention]

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) The present invention uses ordinary melt-spun fibers as the fiber substrate, and the synergistic effect of the added multi-functional substrate realizes the cut-resistant function of the fiber, expanding the selection of cut-resistant substrates in the prior art and reducing the production cost of the product.

[0021] (2) This invention uses porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers as a composite functional substrate. Due to the special crystalline structure of the porous zeolite, the fiber has a large stress field, which enhances its ability to adsorb water vapor molecules in the environment. Carbon nanotubes have excellent conductivity, which provides the fiber with an antistatic effect, and their tubular structure effectively reduces the material density, resulting in a lightweight fiber. Finally, the ultra-high molecular weight polyethylene microfibers selected in this invention not only improve the strength and performance stability of the fiber, but also create a synergistic effect with the porous zeolite and carbon nanotubes, thereby diversifying the functions of the resulting textile product.

[0022] (3) The ultra-high molecular weight polyethylene microfibers in the present invention form a continuous network structure, and the porous zeolite and carbon nanotubes are trapped by the molecular network, forming a stable cut-resistant system, which prevents the functional substrate from being washed away and losing its functionality during subsequent washing. [Brief explanation of the drawings]

[0023] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following will briefly describe the drawings required for use in the embodiments. Of course, the drawings in the following description are only a part of the embodiments of the present invention, and those skilled in the art can further derive other drawings from these drawings without any creative efforts. [Figure 1] 1 is a structural schematic diagram of a melt-spun multifunctional composite fiber prepared in Example 1 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to make the above objects, features and advantages of the present invention more apparent and comprehensible, specific embodiments of the present invention will be described in detail below in connection with examples in the specification.

[0025] In the following description, many specific details are set forth to provide a thorough understanding of the present invention; however, the present invention may be embodied in other forms different from those described herein, and those skilled in the art may similarly develop the present invention without violating the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific examples disclosed below.

[0026] As used herein, "one embodiment" or "embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to an embodiment that is mutually exclusive of other embodiments, either singly or alternatively.

[0027] The raw materials used in the present invention are commercially available and common in the art unless otherwise specified.

[0028] The ultra-high molecular weight polyethylene microfibers used in the specific examples are obtained by ultra-high molecular weight cutting of commercially available ultra-high molecular weight polyethylene fibers using a fiber cutting device, and forming them into microfiber powder having the following characteristics: The length of the microfibers is 20-40 um, the diameter is 2-4 um, and the degree of molecular polymerization is 1.5 million-3 million.

[0029] The porous zeolite is clinoptilolite powder, purchased from Beijing Guotou Shengshi Technology Co., Ltd., with a particle size of 2000 mesh.

[0030] The carbon nanotubes were double-walled carbon nanotubes, purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., and were powders with part number XFM01, diameter 2-4 nm, length 20-40 μm, and volume resistivity ≦100Ω.

[0031] The PET particles were purchased from Changzhou Huarun Composite Material Co., Ltd., with the product number CR-8863.

[0032] Polypropylene particles were purchased from Lee Cheung Yung, Taiwan, with the product number Globalene (登録商標) The number is 6181.

[0033] The fiber filaments produced according to the present invention are knitted by a glove-making machine to produce 15-gauge functional gloves, which are then used for subsequent performance tests. The performance test method is as follows: Cut resistance testing based on ANSI / ISEA105 standard, Humidity control testing based on ASTM D2654-89a standard and Electrostatic charge test based on EN1149-1 standard, Fiber strength test based on GBT19975-2005 standard, This includes washing fastness testing in accordance with GB / T12490-2014 standard.

[0034] Example 1 This example provides a method for producing cut-resistant melt-spun multifunctional composite fibers. Specifically, 1) Using PET particles as a base particle carrier, base particles A containing porous zeolite and carbon nanotubes are produced. The PET particles, porous zeolite powder and carbon nanotube powder are added to a stirring vessel, heated to 60°C, and stirred to mix uniformly at a stirring speed of 1000 r / min to obtain a mixed material. The mixed material is put into a twin-screw extruder and extruded at an extrusion temperature of 270°C. After cooling, drying, granulation and sieving, mother particles A are obtained, in which the total content of porous zeolite and carbon nanotubes in the mother particles A is 15%, and the ratio of porous zeolite to carbon nanotubes is 1:1. 2) Using PET particles as a base particle carrier, base particles B containing ultra-high molecular weight polyethylene microfibers are produced. The PET particles and ultra-high molecular weight polyethylene microfiber powder were added to a stirring vessel, heated to 40°C, and stirred to a uniform mixture at a stirring speed of 1000 r / min to obtain a mixed material. The mixed material is fed into a twin-screw extruder and extruded at an extrusion temperature of 90°C. After cooling, drying, granulation and sieving, mother particles B are obtained, in which the total content of ultra-high molecular weight polyethylene microfibers in the mother particles B is 10%, and the melting point of the PET particles used is 85°C. 3) Producing melt-spun multifunctional composite fibers The total content of the composite functional substrate in the melt-spun multifunctional composite fiber is 2%, and the ratio of the amount of ultra-high molecular weight polyethylene microfiber to the total amount of porous zeolite and carbon nanotubes is 3:1, and the ratio of the amount of porous zeolite to the amount of carbon nanotubes is 1:1, specifically: The PET particles, mother particles A, and mother particles B were stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to achieve a uniform mixture. The blending ratio was controlled so that the total content of the composite functional substrate (porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers) in the final fiber was 2%, where the total content of the porous zeolite and carbon nanotubes was 0.5%, the ratio of the two was 1:1, and the content of the ultra-high molecular weight polyethylene microfibers was 1.5%. The uniformly mixed particles were added to a polymer hopper and extruded at 270°C using a twin-screw extruder, followed by cooling, drawing, and winding to obtain the finished filament. The cooling blow temperature was 19°C, the cooling blow air speed was 0.4 m / s, the draw ratio was 4 times, the winding tension was 20 cN, and the winding speed was 2000 m / min, and the fiber filament of this example was obtained, with a filament specification of 400D.

[0035] Example 2 This embodiment differs from Example 1 in that the content and blending ratio of the multifunctional substrate in the melt-spun multifunctional composite fiber are adjusted, and the other step processes are the same as those of Example 1, specifically: In the step of producing a melt-spun multifunctional composite fiber, The total content of the composite functional substrate in the melt-spun multifunctional composite fiber is 1%, and the ratio of the amount of ultra-high molecular weight polyethylene microfiber to the total amount of porous zeolite and carbon nanotubes is 4:1, and the ratio of the amount of porous zeolite to the amount of carbon nanotubes is 1:1, specifically: The PET particles, the base particles A containing the porous zeolite and the carbon nanotubes, and the base particles B containing the ultra-high molecular weight polyethylene microfibers were stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to be uniformly mixed. The blending ratio was controlled so that the total content of the composite functional substrate (porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers) in the final fiber was 1%, where the total content of the porous zeolite and the carbon nanotubes was 0.2%, the ratio of the two being 1:1, and the content of the ultra-high molecular weight polyethylene microfibers was 0.8%. The uniformly mixed particles are added to a polymer hopper, extruded at 270°C using a twin-screw extruder, cooled and drawn, and wound up to obtain the finished filament, where the cooling blow temperature is 20°C, the cooling blow air speed is 0.4 m / s, the draw ratio is 5 times, the winding tension is 30 cN, and the winding speed is 3000 m / min, and the fiber filament of this example is obtained.

[0036] Example 3 This embodiment differs from Example 1 in that the content and blending ratio of the multifunctional substrate in the melt-spun multifunctional composite fiber are adjusted, and the other step processes are the same as those of Example 1, specifically: Producing a melt-spun multifunctional composite fiber, comprising: The total content of the composite functional substrate in the melt-spun multifunctional composite fiber is 0.6%, and the ratio of the amount of ultra-high molecular weight polyethylene microfiber to the total amount of porous zeolite and carbon nanotubes is 5:1, and the ratio of the amount of porous zeolite to carbon nanotubes is 1:1, specifically: The PET particles, the base particles A containing the porous zeolite and the carbon nanotubes, and the base particles B containing the ultra-high molecular weight polyethylene microfibers were stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to be uniformly mixed. The blending ratio was controlled so that the total content of the composite functional substrate (porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers) in the final fiber was 0.6%, where the total content of the porous zeolite and the carbon nanotubes was 0.1%, the ratio of the two being 1:1, and the content of the ultra-high molecular weight polyethylene microfibers was 0.5%. The uniformly mixed particles are added to a polymer hopper, extruded at 270°C using a twin-screw extruder, cooled and drawn, and wound up to obtain the finished filament, where the cooling blow temperature is 20°C, the cooling blow air speed is 0.4 m / s, the draw ratio is 5 times, the winding tension is 30 cN, and the winding speed is 3000 m / min, and the fiber filament of this example is obtained.

[0037] Example 4 This embodiment differs from Example 1 in that the content and blending ratio of the multifunctional substrate in the melt-spun multifunctional composite fiber are adjusted, and the other step processes are the same as those of Example 1, specifically: Producing a melt-spun multifunctional composite fiber, comprising: The total content of the composite functional substrate in the melt-spun multifunctional composite fiber is 8%, and the ratio of the amount of ultra-high molecular weight polyethylene microfiber to the total amount of porous zeolite and carbon nanotubes is 3:1, and the ratio of the amount of porous zeolite to the amount of carbon nanotubes is 1:1, specifically: The PET particles, the base particles A containing the porous zeolite and the carbon nanotubes, and the base particles B containing the ultra-high molecular weight polyethylene microfibers were stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blending ratio was controlled so that the total content of the composite functional substrate (porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers) in the final fiber was 8%, where the total content of the porous zeolite and the carbon nanotubes was 2%, the ratio of the two was 1:1, and the content of the ultra-high molecular weight polyethylene microfibers was 6%. The uniformly mixed particles are added to a polymer hopper, extruded at 270°C using a twin-screw extruder, cooled and drawn, and wound up to obtain the finished filament, where the cooling blow temperature is 20°C, the cooling blow air speed is 0.4 m / s, the draw ratio is 5 times, the winding tension is 30 cN, and the winding speed is 3000 m / min, and the fiber filament of this example is obtained.

[0038] Example 5 This embodiment differs from Example 1 in that the content and blending ratio of the multifunctional substrate in the melt-spun multifunctional composite fiber are adjusted, and the other step processes are the same as those of Example 1, specifically: Producing a melt-spun multifunctional composite fiber, comprising: The total content of the composite functional substrate relative to the melt-spun multifunctional composite fiber is 10%, and the ratio of the amount of ultra-high molecular weight polyethylene microfibers to the total amount of porous zeolite and carbon nanotubes is 4:1, and the ratio of the amount of porous zeolite to carbon nanotubes is 1:1, specifically: The PET particles, the base particles A containing the porous zeolite and the carbon nanotubes, and the base particles B containing the ultra-high molecular weight polyethylene microfibers were stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blending ratio was controlled so that the total content of the composite functional substrate (porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers) in the final fiber was 10%, where the total content of the porous zeolite and the carbon nanotubes was 2%, the ratio of the two was 1:1, and the content of the ultra-high molecular weight polyethylene microfibers was 8%. The uniformly mixed particles are added to a polymer hopper, extruded at 270°C using a twin-screw extruder, cooled and drawn, and wound up to obtain the finished filament, where the cooling blow temperature is 20°C, the cooling blow air speed is 0.4 m / s, the draw ratio is 5 times, the winding tension is 30 cN, and the winding speed is 3000 m / min, and the fiber filament of this example is obtained.

[0039] Comparative Example 1 This comparative example differs from Example 1 in that in the step of producing melt-spun multifunctional composite fibers, only base particles B containing ultra-high molecular weight polyethylene microfibers are added, i.e., the multifunctional substrate is only ultra-high molecular weight polyethylene microfibers, with a total content of 2%. The other step processes refer to Example 1, thereby obtaining the fiber filaments of this comparative example.

[0040] Comparative Example 2 This comparative example differs from Example 1 in that only porous zeolite is added in the step of producing melt-spun multifunctional composite fibers, i.e., the multifunctional substrate is only porous zeolite, with a total content of 2%. The other step processes are the same as those of Example 1, thereby obtaining the fiber filaments of this comparative example.

[0041] Comparative Example 3 Compared with Example 1, this comparative example differs in that only carbon nanotubes are added in the step of producing melt-spun multifunctional composite fibers, i.e., the composite functional substrate is only carbon nanotubes, with a total content of 2%. The other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

[0042] Comparative Example 4 This comparative example differs from Example 1 in that only porous zeolite and carbon nanotubes are added in the step of producing melt-spun multifunctional composite fiber, i.e., the multifunctional substrate is only porous zeolite and carbon nanotubes, with a total content of 2% and a usage ratio of 1:1. The other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

[0043] The fiber filaments produced in Examples 1 to 5 and Comparative Examples 1 to 4 were manufactured into 15-gauge functional gloves, and relevant performance tests were carried out in accordance with the above standards. The results are shown in Table 1. TIFF2025178031000002.tif154170 (Note: Washing fastness is measured by the resistivity retention rate after 10 washes)

[0044] As can be seen from Table 1, with an increase in the total amount of composite functional base material, the overall performance of the fiber improves and then declines. When the functional base material is added in an appropriate amount, it can strengthen the fiber structure and form an effective stress transmission and dispersion mechanism. However, if the amount added is too high, it can increase the internal stress of the fiber and affect the original fiber structure, thereby reducing system stability and degrading fiber performance. In contrast, within the addition range of the present invention, fibers with excellent overall properties can be obtained.

[0045] In the comparative example, when only one of the ultra-high molecular weight polyethylene microfibers, porous zeolite, and carbon nanotubes was added, the overall performance of the fiber was significantly reduced. In contrast, in the solution of the present invention, the ultra-high molecular weight polyethylene microfibers provide strength and stability to the fiber due to their high molecular weight and excellent mechanical properties, and at the same time form a continuous network structure, and the porous zeolite and carbon nanotubes are captured by the molecular network to form a stable system, thereby preventing the functional substrate from being washed away during the subsequent washing process and reducing its functionality.

[0046] Example 6 This example is used to investigate the effect of the ratio of the amount of ultra-high molecular weight polyethylene microfibers to the total amount of porous zeolite and carbon nanotubes in the composite substrate on the performance of the manufactured fiber. Compared with Example 1, the difference is that the ratio of the amount of ultra-high molecular weight polyethylene microfibers to the total amount of porous zeolite and carbon nanotubes in step 3) of Example 1 is adjusted to 1:1, 5:1, and 7:1, and the other step processes refer to Example 1. The fiber filaments manufactured in this example were manufactured into 15-gauge functional gloves, and relevant performance tests were carried out in accordance with the above standards. The results are compared with the case of 3:1 in Example 1, and are shown in Table 2. TIFF2025178031000003.tif81170

[0047] As can be seen from Table 2, in the solution of the present invention, the ratio of the amount of polyethylene microfibers used to the total amount of porous zeolite and carbon nanotubes has a significant impact on the performance of the fiber. If the amount of ultra-high molecular weight polyethylene microfibers is too high, the network structure will be too dense, which may limit the uniform distribution of the porous zeolite and carbon nanotubes in the fiber. If the amount of porous zeolite and carbon nanotubes is too low, the moisture content and antistatic effect will be significantly reduced. However, if the amount of ultra-high molecular weight polyethylene microfibers is too low, a stable structure cannot be formed, which will make the functional substrate more likely to be washed away during the washing process, resulting in a decrease in functionality.

[0048] Example 7 This example was used to investigate the effect of the ratio of porous zeolite to carbon nanotubes in the composite substrate on the performance of the produced fiber, and differs from Example 1 in that the ratio of porous zeolite to carbon nanotubes used in step 1) and step 3) of Example 1 was adjusted to 3:1, 4:1, and 1:2, with the other steps referring to Example 1. The fiber filaments produced in this example were made into 15-gauge functional gloves, and relevant performance tests were carried out in accordance with the above standards. The results were compared with those of Example 1 with a 1:1 ratio, and are shown in Table 3. TIFF2025178031000004.tif81170

[0049] As can be seen from Table 3, the ratio of porous zeolite to carbon nanotubes in the composite matrix has a significant impact on the performance of the resulting fiber. The porous zeolite and carbon nanotubes have complementary effects on the fiber. The adsorption properties of the zeolite, combined with the conductive properties of the carbon nanotubes, can maintain a certain moisture content in the fiber while providing excellent antistatic properties. If the zeolite content is too high, the moisture content of the fiber will be too high, which may affect the fiber's conductivity and cut resistance. If the carbon nanotube content is too high, the fiber's conductivity will be too high, but some of the adsorption properties and strength will be sacrificed. Therefore, optimizing the ratio of porous zeolite to carbon nanotubes is one of the key factors for producing cut-resistant melt-spun multifunctional composite fibers.

[0050] Comparative Example 5 This comparative example differs from Example 1 in that the ultra-high molecular weight polyethylene microfibers in the multi-functional substrate are converted into silicon carbide whiskers, and the other step processes are the same as those in Example 1, thereby obtaining the fiber filaments of this comparative example.

[0051] Comparative Example 6 This comparative example differs from Example 1 in that the ultra-high molecular weight polyethylene microfibers in the composite functional substrate are adjusted to ceramic fibers, and the other step processes are the same as those in Example 1, thereby obtaining the fiber filaments of this comparative example.

[0052] Comparative Example 7 This comparative example differs from Example 1 in that the carbon nanotubes in the composite functional substrate are converted into graphene, and the other step processes are the same as those in Example 1, thereby obtaining the fiber filaments of this comparative example.

[0053] Comparative Example 8 This comparative example differs from Example 1 in that the porous zeolite in the multi-functional substrate is adjusted to calcium alginate, and the other step processes are the same as those in Example 1, thereby obtaining the fiber filaments of this comparative example.

[0054] The fiber filaments produced in Comparative Examples 5 to 8 were manufactured into 15-gauge functional gloves, and the relevant performance tests were carried out in accordance with the above standards. The results were compared with those of Example 1 and are shown in Table 4. TIFF2025178031000005.tif95170

[0055] As can be seen from Table 4, in the case of combining multiple types of functional substrates, the performance of the fiber obtained by using ultra-high molecular weight polyethylene microfibers, carbon nanotubes, and porous zeolite as a composite functional substrate in the present invention is optimal. If the ultra-high molecular weight polyethylene microfibers are replaced with other hard fibers, certain cut resistance and mechanical properties will be maintained, but the overall performance will be significantly reduced due to structural differences. For example, silicon carbide whiskers are likely to form stress concentration points in the fiber, which will destroy the interaction between the carbon nanotubes and the porous zeolite, further reducing the overall performance. Furthermore, silicon carbide whiskers may fall off or break from the fiber during the washing process, which will destroy the structure. However, the rigid structure of the ceramic fiber will limit the free movement and adsorption performance of the zeolite in the fiber, further affecting the overall performance.

[0056] In contrast, graphene also has good electrical conductivity, but the dispersion and interfacial bonding of its sheet structure in the substrate are inferior to those of carbon nanotubes, and stacking may occur in the fibers, which increases the fiber density, reduces toughness, and affects the water absorption and water retention of the fibers. In addition, the weak interaction between graphene and porous zeolite may be destroyed during washing, further affecting the washing durability.

[0057] Although calcium alginate itself has high water absorption and water retention properties, the overall moisture content is affected by its distribution and bonding state in the fiber. In addition, calcium alginate tends to form a loose structure in the fiber, which makes it more susceptible to deformation and breakage under the action of external forces, further affecting the overall performance.

[0058]

[0010] As described above, the present invention uses porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers as a composite functional substrate, and the synergistic effect of the three components diversifies the functions of the resulting textile products. The ultra-high molecular weight polyethylene microfibers form a continuous network structure, and the porous zeolite and carbon nanotubes are trapped by this molecular network to form a stable cut-resistant system, thereby preventing the functional substrate from being washed away and reducing its functionality.

[0011] The present invention uses ordinary melt-spun fibers as the fiber substrate, and the synergistic effect of the added composite functional substrate achieves the cut-resistant function of the fiber, expanding the options for cut-resistant substrates compared to the prior art and reducing the production costs of the product.

[0059] It should be understood that the above embodiments are intended to illustrate the technical solutions of the present invention, but not to limit the same, and the present invention has been described in detail with reference to the preferred embodiments. However, those skilled in the art can make modifications or equivalent substitutions to the technical solutions of the present invention, and without departing from the spirit and scope of the technical solutions of the present invention, all such modifications or equivalent substitutions shall be included in the scope of the claims of the present invention.

Claims

1. It has a flexible network structure, (i) Porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers are used as a composite functional substrate, and ordinary melt-spun fibers are used as a main fiber substrate; (ii) A cut-resistant melt-spun multifunctional composite fiber, characterized in that the total content of the multifunctional substrate relative to the melt-spun multifunctional composite fiber is 0.5% to 10%.

2. The cut-resistant melt-spun multifunctional composite fiber according to claim 1, characterized in that the ratio of the amount of ultra-high molecular weight polyethylene microfibers to the total amount of porous zeolite and carbon nanotubes in the composite functional substrate is 2 to 5:

1.

3. The cut-resistant melt-spun multifunctional composite fiber according to claim 1, wherein the ratio of the porous zeolite to the carbon nanotubes in the composite functional substrate is 1 to 3:

1.

4. The cut-resistant melt-spun multifunctional composite fiber according to claim 2, characterized in that the ultra-high molecular weight polyethylene microfibers have a diameter of 2 to 4 μm, a length of 20 to 40 μm, a molecular polymerization degree of 1.5 million to 3 million, and a melting point of 130 to 136°C.

5. The cut-resistant melt-spun multifunctional composite fiber according to claim 3, wherein the particle size of the porous zeolite is 2000-2500 mesh.

6. The cut-resistant melt-spun multifunctional composite fiber according to claim 3, wherein the carbon nanotubes have a diameter of 2-4 nm, a length of 20-40 μm, and a volume resistivity of ≦100Ω.

7. 2. The cut-resistant melt-spun multifunctional composite fiber of claim 1, wherein the conventional melt-spun fiber comprises one of polyester, polyethylene fiber, polypropylene, and nylon.

8. The melt-spun multifunctional composite fiber is obtained by blending base particles A containing porous zeolite and carbon nanotubes with base particles B containing ultra-high molecular weight polyethylene microfibers, and melt-spinning the blend; a step of uniformly mixing the base particles A, base particles B, and carrier particles by stirring at 50 to 70°C to obtain blended particles, wherein the carrier particles include either PET particles or polypropylene particles, and the total amount of the composite functional substrate contained in the base particles A and the base particles B relative to the total amount of the melt-spun multifunctional composite fiber is controlled to be 0.5% to 10%, and the content of the ultra-high molecular weight polyethylene microfiber in the base particles B relative to the total amount of the composite functional substrate is controlled to be 50 to 85%; 8. The method for producing the cut-resistant melt-spun multifunctional composite fiber according to claim 1, further comprising the steps of: adding the blend particles to a polymer hopper, extruding the blend particles through a twin-screw extruder at 250-300°C, cooling and drawing the extruded particles, and winding the extruded particles to obtain a finished filament; wherein the cooling blow temperature is 17-21°C, the cooling blow speed is 0.4-0.5 m / s, the draw ratio is 4-5 times, and the winding tension is 20-30 cN.

9. The method for producing the base particles A includes the steps of: the carrier particles, the porous zeolite powder, and the carbon nanotube powder are heated and stirred to be mixed at 50-70°C, and the resulting mixed material is fed into a twin-screw extruder and extruded at 250-300°C, and then cooled, dried, granulated, and sieved to obtain base particles A, wherein the total content of the porous zeolite and the carbon nanotubes is 10-20% of the base particles A, and the ratio of the amount of the porous zeolite to the amount of the carbon nanotubes used is 2:1-3; The method for producing the base particles B includes the steps of: The method includes the steps of: stirring and heating the carrier particles and the ultra-high molecular weight polyethylene microfiber powder to mix them at 30-50°C; feeding the resulting mixed material into a twin-screw extruder and extruding it at 80-100°C; and then cooling, drying, granulating, and sieving the resulting material to obtain base particles B, wherein the total content of the ultra-high molecular weight polyethylene microfibers is 5-15% of the base particles B; 9. The method for producing a cut-resistant melt-spun multifunctional composite fiber according to claim 8, wherein the carrier particles comprise one of PET particles and polypropylene particles.

10. 10. The application of the melt-spun multifunctional composite fiber of claim 1 to the manufacture of cut-resistant fabrics.

Images