Cut-resistant melt-spun multifunctional composite fiber and its manufacturing method and application

Abstract

To provide a cut-resistant melt-spun multifunctional composite fiber and its manufacturing method and application. [Solution] Porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers are used as a composite functional substrate. Due to the special crystal structure of the fiber, the porous zeolite has a large stress field, which improves the adsorption performance of water vapor molecules in the environment. The carbon nanotubes have excellent electrical conductivity, which can provide the fiber with an antistatic effect, and the tubular structure can effectively reduce the density of the material, thereby realizing the weight reduction of the fiber. Finally, the ultra-high molecular weight polyethylene microfibers selected in the present invention can improve the strength and performance stability of the fiber, and can create a synergistic effect with the porous zeolite and carbon nanotubes, thereby diversifying the functions of the obtained fiber product.

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 preparation method and application. [Background technology]

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

[0003] Ultra-high molecular weight fiber occupies a leading position in the cut-resistant fiber market due to its excellent mechanical properties and cut resistance. However, the production cost of such fibers is very high due to the complex manufacturing process and strict production conditions. In addition, the production process of ultra-high molecular weight fiber also requires high-precision equipment and technical support. Due to the special characteristics of ultra-high molecular weight fiber, the production process is difficult to control and often needs to be carried out under certain temperature and pressure, which further increases the production cost and difficulty.

[0004] Cut-resistant textile products that rely on ultra-high molecular weight fibers have problems in terms of cost and difficulty of production, as well as a problem of uniformity in terms of function. The cut-resistant textiles produced are limited by the properties of the ultra-high molecular weight fibers themselves, and often only have a single cut resistance, and lack other multifunctional properties, such as antistatic, fireproof, heat resistance, etc. This uniformity limits the application of cut-resistant textiles to more fields, especially when the performance requirements of the material are more stringent, 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 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 PRESENT EMBODIMENT 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 conjugate fiber.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: 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 composite functional 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 according to 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 composite functional 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 the porous zeolite to the amount of the carbon nanotubes in the multifunctional substrate is 1-3:1.

[0011] In a preferred embodiment of the cut-resistant melt-spun multifunctional composite fiber according to the present invention, the ultra-high molecular weight polyethylene microfiber has a diameter of 2 to 4. μ m, length 20-40 μm, molecular polymerization degree is 1.5 million to 3 million, and melting point is 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 and a length of 20-40 nm. μ m, volume resistivity ≦ 100Ω ·cm It is.

[0014] In the preferred embodiment of the cut-resistant melt-spun multi-functional composite fiber according to the present invention, the conventional melt-spun fiber includes 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 and 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 at 50 to 70°C to obtain blend particles, the carrier particles including one of PET particles and polypropylene particles, the total amount of composite functional substrates included in the base particles A and the base particles B relative to the total amount of the melt-spun multifunctional composite fiber being controlled to 0.5% to 10%, and the content of ultra-high molecular weight polyethylene microfibers in the base particles B relative to the total amount of the composite functional substrate being controlled to 50 to 85%; and adding the blended particles to a polymer hopper, extruding the blended particles at 250-300°C using a twin-screw extruder, and cooling, drawing, and winding to obtain a finished filament, in which 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] As 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 includes the steps of: The method includes the steps of: stirring and heating the carrier particles, the porous zeolite powder and the carbon nanotube powder so as to mix them at 50-70°C; feeding the resulting mixed material into a twin-screw extruder and extruding it at 250-300°C; and obtaining base particles A through cooling, drying, granulation and sieving; the total content of the porous zeolite and the carbon nanotubes is 10-20% of the base particles A, and the usage ratio of the porous zeolite and the carbon nanotubes is 2:1-3; The method for producing the base particles B includes the steps of: The carrier particles and the ultra-high molecular weight polyethylene microfiber powder are mixed and heated at 30-50°C, and the mixed material is fed into a twin-screw extruder and extruded at 80-100°C, and then cooled, dried, granulated, and sieved to obtain base particles A, in which the total content of the ultra-high molecular weight polyethylene microfibers is 5-15% of the base particles B; The carrier particles include one of PET particles and polypropylene particles.

[0018] It is a further object of the present invention to provide an application of the cut resistant melt spun multifunctional composite fibers in the manufacture of cut resistant fabrics. Effect 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 between the added composite 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 costs of the product.

[0021] (2) The present invention uses porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers as a composite functional substrate. Due to the special crystal structure of the fiber, the porous zeolite has a large stress field, which improves the adsorption performance of water vapor molecules in the environment. The carbon nanotubes have excellent electrical conductivity, which can provide antistatic effect to the fiber, and the tubular structure can effectively reduce the density of the material, thereby realizing the weight reduction of the fiber. Finally, the ultra-high molecular weight polyethylene microfibers selected in the present invention can improve the strength and performance stability of the fiber, and can create a synergistic effect with the porous zeolite and carbon nanotubes, thereby diversifying the functions of the obtained fiber products.

[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 captured by the molecular network to form a stable cut-resistant system, which prevents the functional substrate from being washed away in the subsequent washing process and reducing its functionality. [Brief description 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

[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 conjunction with examples in the specification.

[0025] In the following description, many specific details are described in order to fully understand the present invention, but the present invention can be embodied in other forms different from the description, and those skilled in the art can develop the present invention in a similar manner without violating the spirit and scope of the present invention, and therefore the present invention is not limited to the specific examples disclosed below.

[0026] In the following, "one embodiment" or "embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one realization 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 with other embodiments, either alone or in the alternative.

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

[0028] The ultra-high molecular weight polyethylene microfibers used in the specific examples are obtained by cutting commercially available ultra-high molecular weight polyethylene fibers with a fiber cutting device, and forming them into microfiber powder having the following characteristics: Microfibril length: 20-40 μ m, diameter: 2~4 μ m, 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 are double-walled carbon nanotubes, purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., part number XFM01, diameter 2-4 nm, length 20-40 mm. μ m, volume resistivity ≦ 100Ω·cm It is a powder.

[0031] The PET particles were purchased from Changzhou Huarun Composite Materials Co., Ltd., with the part 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 for subsequent performance tests. The performance test method is as follows: Cut resistance testing based on the ANSI / ISEA105 standard, Humidity control test based on ASTM D2654-89a standard, Electrostatic test based on EN1149-1 standard, Fiber strength test based on GBT19975-2005 standard, This includes washing fastness test based on GB / T12490-2014 standard.

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

[0035] Example 2 This embodiment is different from Example 1 in that the content and compounding ratio of the composite functional substrate in the melt-spun multifunctional composite fiber is adjusted, and the other step process refers to Example 1, specifically: The step of producing a melt spun multifunctional composite fiber includes: 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 are stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blend ratio is controlled so that the total content of the composite functional base material (porous zeolite, carbon nanotubes and ultra-high molecular weight polyethylene microfibers) in the final fiber is 1%, where the total content of the porous zeolite and the carbon nanotubes is 0.2%, the ratio of the two is 1:1, and the content of the ultra-high molecular weight polyethylene microfibers is 0.8%. The uniformly mixed particles are added to a polymer hopper, extruded by a twin-screw extruder at 270°C, 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 0.4m / s, the draw ratio is 5 times, the winding tension is 30cN, and the winding speed is 3000m / min, to obtain the fiber filament of this embodiment.

[0036] Example 3 This embodiment is different from Example 1 in that the content and compounding ratio of the composite functional substrate in the melt-spun multifunctional composite fiber is adjusted, and the other step process refers to Example 1, specifically: Producing a melt spun multi-functional 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 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 are stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blend ratio is controlled so that the total content of the composite functional base material (porous zeolite, carbon nanotubes and ultra-high molecular weight polyethylene microfibers) in the final fiber is 0.6%, where the total content of the porous zeolite and the carbon nanotubes is 0.1%, the ratio of the two is 1:1, and the content of the ultra-high molecular weight polyethylene microfibers is 0.5%. The uniformly mixed particles are added to a polymer hopper, extruded by a twin-screw extruder at 270°C, 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 0.4m / s, the draw ratio is 5 times, the winding tension is 30cN, and the winding speed is 3000m / min, to obtain the fiber filament of this embodiment.

[0037] Example 4 This embodiment is different from Example 1 in that the content and compounding ratio of the composite functional substrate in the melt-spun multifunctional composite fiber is adjusted, and the other step process refers to Example 1, specifically: Producing a melt spun multi-functional 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 are stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blend ratio is controlled so that the total content of the composite functional base material (porous zeolite, carbon nanotubes and ultra-high molecular weight polyethylene microfibers) in the final fiber is 8%, where the total content of the porous zeolite and the carbon nanotubes is 2%, the ratio of the two is 1:1, and the content of the ultra-high molecular weight polyethylene microfibers is 6%. The uniformly mixed particles are added to a polymer hopper, extruded by a twin-screw extruder at 270°C, 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 0.4m / s, the draw ratio is 5 times, the winding tension is 30cN, and the winding speed is 3000m / min, to obtain the fiber filament of this embodiment.

[0038] Example 5 This embodiment is different from Example 1 in that the content and compounding ratio of the composite functional substrate in the melt-spun multifunctional composite fiber is adjusted, and the other step process refers to Example 1, specifically: Producing a melt spun multi-functional composite fiber, comprising: The total content of the composite functional substrate in the melt-spun multifunctional composite fiber is 10%, 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 are stirred at a temperature of 60°C for 15 minutes at a stirring speed of 500 r / min to mix uniformly. The blend ratio is controlled so that the total content of the composite functional base material (porous zeolite, carbon nanotubes and ultra-high molecular weight polyethylene microfibers) in the final fiber is 10%, where the total content of the porous zeolite and the carbon nanotubes is 2%, the ratio of the two is 1:1, and the content of the ultra-high molecular weight polyethylene microfibers is 8%. The uniformly mixed particles are added to a polymer hopper, extruded by a twin-screw extruder at 270°C, 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 0.4m / s, the draw ratio is 5 times, the winding tension is 30cN, and the winding speed is 3000m / min, to obtain the fiber filament of this embodiment.

[0039] Comparative Example 1 Compared with Example 1, this comparative example has the difference that in the step of producing melt-spun multifunctional composite fiber, only base particles B containing ultra-high molecular weight polyethylene microfibers are added, that is, the composite functional substrate is only ultra-high molecular weight polyethylene microfibers, with a total content of 2%, and the other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

[0040] Comparative Example 2 The difference between this comparative example and Example 1 is that in the step of preparing the melt-spun multifunctional composite fiber, only porous zeolite is added, that is, the composite functional substrate is only porous zeolite, with a total content of 2%, and the other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

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

[0042] Comparative Example 4 Compared with Example 1, this comparative example has the difference that only porous zeolite and carbon nanotubes are added in the step of producing melt-spun multifunctional composite fiber, that is, the composite functional substrate is only porous zeolite and carbon nanotubes, with a total content of 2% and a usage ratio of 1:1, and 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 with reference to the above standards. The results are shown in Table 1. TIFF0007655602000002.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 the composite functional base material, the overall performance of the fiber improves and then deteriorates. 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, when the amount of the functional base material is too high, it can increase the internal stress of the fiber and affect the original fiber structure, thereby reducing the system stability and degrading the fiber performance. On the other hand, within the addition range of the present invention, a fiber with excellent overall properties can be obtained.

[0045] In the comparative example, when only one of the ultra-high molecular weight polyethylene microfibers, the porous zeolite and the carbon nanotubes was added, the overall performance of the fiber was obviously 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 the 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 study the performance effect of the manufactured fiber according to the ratio of the amount of ultra-high molecular weight polyethylene microfibers used in the composite substrate to the total amount of porous zeolite and carbon nanotubes, and compared with Example 1, the difference is that the ratio of the amount of ultra-high molecular weight polyethylene microfibers used in step 3) of Example 1 to the total amount of porous zeolite and carbon nanotubes used 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 are manufactured into 15 gauge functional gloves, and the relevant performance tests are carried out with reference to the above standards, compared with the case of 3:1 in Example 1, and the results are shown in Table 2. TIFF0007655602000003.tif81170

[0047] As can be seen from Table 2, in the solution of the present invention, the ratio of the amount of polyethylene microfibers 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 makes the functional substrate easy to be washed away during the washing process, leading to a decrease in functionality.

[0048] Example 7 This example is used to study the effect of the ratio of porous zeolite to carbon nanotubes in the composite substrate on the performance of the produced fiber, and is different from Example 1 in that the ratio of the amount of porous zeolite to carbon nanotubes in step 1) and step 3) of Example 1 is adjusted to 3:1, 4:1, and 1:2, and the other step processes refer to Example 1. The fiber filament produced in this example is manufactured into a 15-gauge functional glove, and the relevant performance tests are carried out with reference to the above standards, and compared with the case of 1:1 in Example 1, and the results are shown in Table 3. TIFF0007655602000004.tif81170

[0049] As can be seen from Table 3, the ratio of the porous zeolite and the carbon nanotubes in the composite substrate has a significant effect on the performance of the produced fiber, and the porous zeolite and the carbon nanotubes can produce a complementary effect in the fiber, and the adsorption performance of the zeolite can cooperate with the conductive performance of the carbon nanotubes to maintain the fiber at a certain moisture content and have a good antistatic effect. If the content of the zeolite is too high, the moisture content of the fiber will be too high, which may affect the conductivity and cut resistance of the fiber, and if the content of the carbon nanotubes is too high, the conductivity of the fiber may be too high, but some of the adsorption performance and strength will be sacrificed. Therefore, optimizing the ratio of the porous zeolite and the carbon nanotubes is one of the key points for the production of cut-resistant melt-spun multifunctional composite fibers.

[0050] Comparative Example 5 The difference between this comparative example and Example 1 is that the ultra-high molecular weight polyethylene microfibers in the composite functional substrate are adjusted to silicon carbide whiskers, and the other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

[0051] Comparative Example 6 The difference between this comparative example and Example 1 is that the ultra-high molecular weight polyethylene microfibers in the composite functional substrate are adjusted to ceramic fibers, and the other step processes refer to Example 1, thereby obtaining the fiber filaments of this comparative example.

[0052] Comparative Example 7 The difference between this comparative example and Example 1 is that the carbon nanotubes in the composite functional substrate are adjusted to graphene, and the other step processes refer to Example 1, thereby obtaining the fiber filament of this comparative example.

[0053] Comparative Example 8 The difference between this comparative example and Example 1 is that the porous zeolite in the composite functional substrate is adjusted to calcium alginate, and the other step processes refer to Example 1, thereby obtaining the fiber filament 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. TIFF0007655602000005.tif95170

[0055] As can be seen from Table 4, in the embodiment in which multiple types of functional substrates are combined, 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. When the ultra-high molecular weight polyethylene microfibers are replaced with other hard fibers, the fiber still has a certain cut resistance and mechanical properties, but the overall performance is significantly reduced due to structural differences. For example, silicon carbide whiskers are prone to form stress concentration points in the fiber, which destroys the interaction between the carbon nanotubes and the porous zeolite, further reducing the overall performance. In addition, silicon carbide whiskers may fall off or break from the fiber during the washing process, which destroys the structure. However, the rigid structure of the ceramic fiber may 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 dispersibility 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 the 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, which may further affect the washability.

[0057] Although calcium alginate itself has high water absorption and water retention, the overall moisture content is affected by its distribution and bonding state in the fiber. Moreover, calcium alginate tends to form a loose structure in the fiber, so deformation and breakage occur more easily under the action of external force, further affecting the overall performance.

[0058] In view of the above, the present invention uses porous zeolite, carbon nanotubes and ultra-high molecular weight polyethylene microfibers as the composite functional substrate, and the three elements create a synergistic effect, thereby diversifying the functions of the resulting textile product, and the ultra-high molecular weight polyethylene microfibers form a continuous network structure, while the porous zeolite and carbon nanotubes are captured by the molecular network to form a stable cut-resistant system, thereby preventing the functional substrate from being washed away in the subsequent washing process and reducing its functionality. The present invention uses ordinary melt-spun fibers as the textile substrate, and the synergistic effect between the added composite functional substrates 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.

[0059] It should be understood that the above embodiments are for illustrating the technical solutions of the present invention, not for limiting 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 replacements to the technical solutions of the present invention, and all such modifications or equivalent replacements shall be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. It has a flexible network structure, (i) using porous zeolite, carbon nanotubes, and ultra-high molecular weight polyethylene microfibers as a composite functional substrate, and using ordinary melt-spun fibers as a main fiber substrate; (ii) A cut-resistant melt-spun multifunctional composite fiber, comprising: a total content of the composite functional substrate in the melt-spun multifunctional composite fiber of 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 microfiber has a diameter of 2-4 μm, a length of 20-40 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 ≦100 Ω·cm.

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

8. A method for producing a cut-resistant melt-spun multifunctional composite fiber according to any one of claims 1 to 7, comprising the steps of: The melt-spun multifunctional composite fiber is obtained by blending base particles A containing porous zeolite and carbon nanotubes and base particles B containing ultra-high molecular weight polyethylene microfibers, followed by melt spinning the blend, and the production method is a step of uniformly mixing the base particles A, base particles B and carrier particles at 50-70°C to obtain blend particles, the carrier particles including one of PET particles and polypropylene particles, the total amount of the composite functional substrate included in the base particles A and the base particles B relative to the total amount of the melt-spun multifunctional composite fiber being controlled to 0.5%-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 being controlled to 50-85%; adding the blend particles to a polymer hopper, extruding the blend particles through a twin screw extruder at 250-300°C, and cooling and drawing the extruded particles to obtain a finished filament, wherein the cooling blow temperature is 17-21°C, the cooling blow speed is 0.4-0.5m / s, the draw ratio is 4-5 times, and the winding tension is 20-30cN. A method for producing cut-resistant melt-spun multi-functional composite fibers.

9. The method for producing the base particles A includes the steps of: The method includes the steps of: stirring and heating the carrier particles, the porous zeolite powder and the carbon nanotube powder so as to mix them at 50-70°C; feeding the resulting mixed material into a twin-screw extruder and extruding it at 250-300°C; and cooling, drying, granulating and sieving the resulting mother particles A, in which the total content of the porous zeolite and the carbon nanotubes is 10-20% of the mother 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 so as 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 cooling, drying, granulating and screening to obtain base particles B, in which the total content of the ultra-high molecular weight polyethylene microfibers is 5-15% of the base particles B; 9. The method of claim 8, wherein the carrier particles include one of PET particles and polypropylene particles.

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

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