Thermally insulated, abrasion-resistant nylon braided sleeve material and method of making same

Abstract

The application claims a kind of heat-insulating wear-resistant nylon braided sleeve material and its preparation method, which is characterized by comprising the following steps: (1) braiding multiple ply nylon monofilament and multiple beam twisted nylon multifilament to obtain a braided tape; (2) heat setting the braided tape formed by braiding to obtain a sheath; (3) coating a surface protection material on both sides of the sheath, and drying to obtain a braided nylon sleeve material; the surface protection material is prepared by mixing hollow MoS2, a composite material loaded with wrinkled sheet-like CeO2, a binder and a solvent in a certain mass ratio. The nylon braided sleeve material prepared by the application has excellent wear resistance, heat insulation and antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a heat-insulating and wear-resistant sheathing material for cables and its preparation method. Background Technology

[0002] In modern power systems, communication equipment, new energy vehicles, and industrial automation, cables serve as the lifeline for energy transmission and signal control, and their reliability and safety are paramount. During installation, use, and maintenance, cables constantly face complex mechanical stresses and harsh environmental challenges. On one hand, the cable sheath wears down due to continuous friction and vibration with cable trays, equipment sheet metal parts, or other cables, leading to insulation damage and the risk of short circuits and leakage. In environments such as engine compartments, near battery packs, and high-temperature equipment areas, cables must be protected from localized high-temperature burns caused by external heat sources to prevent insulation aging and melting. On the other hand, in humid and warm environments, mold, bacteria, and other microorganisms easily grow on the surface of cable conduits. The metabolic products of these microorganisms can corrode the conduit material, reducing its performance and significantly shortening its protective lifespan.

[0003] Currently, the market urgently needs a sleeve material with an innovative structure that can not only provide basic physical protection, but also integrate a variety of advanced protective functions such as wear resistance, heat insulation, and antibacterial properties, in order to meet the comprehensive requirements of modern high-end equipment and harsh application environments for cable protection systems. Summary of the Invention

[0004] To address the above technical problems, this application proposes a heat-insulating and wear-resistant sleeve material and its preparation method.

[0005] A method for preparing a heat-insulating and wear-resistant nylon braided tubing material, characterized by comprising the following steps: (1) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (2) The woven tape is heated and shaped to obtain a sheath; (3) Coat both sides of the sheath with a protective material and dry to obtain the braided nylon sheath material.

[0006] The preparation method of the surface protective material is as follows: A. Add the sulfur source and molybdenum source to a mixed solvent of isopropanol / water and mix evenly, controlling the volume ratio of isopropanol / water to be (3-5):1; transfer the mixed solvent into a high-pressure reactor and react at 150-180℃ for 12-20h to obtain hollow MoS2. B. After washing and drying MoS2, disperse it in deionized water and mix it evenly; add cerium source and triethylenetetramine and mix evenly. Transfer the mixture to a high-pressure reactor and react at 160-180℃ for 12-20h to obtain a composite material of hollow MoS2 loaded with wrinkled sheet-like CeO2. C. After mixing the composite material, binder and solvent obtained in step B in a certain mass ratio and mixing them evenly, the surface protection material can be obtained.

[0007] Optionally, the sulfur source is CH4N2S and the molybdenum source is Na2MoO4; Optionally, the cerium source is Ce(NO3)3·6H2O; Optionally, the molar ratio of cerium source to triethylenetetramine is 1:(2-3). Optionally, in step C, the mass ratio of the composite material, binder, and solvent is (50-60):(10-15):(300-500). Optionally, the nylon type may be one or more of nylon 6, nylon 66, nylon 611, and nylon 612; Optionally, the nylon monofilament is obliquely woven, and the twisted nylon multifilament is located between the two obliquely woven bundles of nylon monofilament layers, with the twisted nylon multifilament arranged in the warp direction; Optionally, the heat setting temperature for the woven tape is 140℃~180℃; Optionally, the binder is one or more of polyvinyl alcohol, polyacrylate and waterborne polyurethane, and the solvent is water.

[0008] The technical effects that this application can achieve are: (1) Nylon is used as the cable sheath material. Its high rigidity and high strength ensure that the sheath can effectively resist deformation when under pressure. Its excellent wear resistance greatly reduces the volume wear rate of the sheath during installation and use. Multi-strand nylon monofilaments and multi-bundle twisted nylon multifilaments are woven together. The nylon monofilaments provide the tensile strength and compressive strength of the sheath, while the fine fibers of the multifilaments can slide freely, absorb deformation stress, and improve the flexibility and wear resistance of the sheath. (2) A surface protective material is coated on the surface of the bushing. The hollow structure of nano-molybdenum disulfide is filled with air to form tiny heat insulation units, which can effectively block the direct conduction of heat. The wrinkled cerium oxide grows on the surface of molybdenum disulfide, which can prolong the heat flow path and reduce the heat conduction efficiency. Together, they effectively block the external heat from being transferred to the inside of the cable or reduce the loss of internal heat, thereby significantly enhancing the heat insulation performance of the bushing.

[0009] (3) Nanoscale cerium oxide has a large specific surface area, which improves its antibacterial properties. Hollow molybdenum disulfide can form a heterojunction with the cerium oxide, which promotes the separation of photogenerated electron-hole pairs. This allows for the catalytic generation of more highly reactive oxygen species under light conditions. These reactive oxygen species can oxidize and destroy the components of microorganisms, thus preventing microorganisms from corroding the casing. Attached Figure Description

[0010] Figure 1 This is a SEM image of the hollow MoS2 composite material loaded with wrinkled sheet-like CeO2 prepared in Example 1 of this application.

[0011] Figure 2 This is a flowchart illustrating the preparation process of the sleeve material in this application. Detailed Implementation

[0012] To more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with embodiments. For those skilled in the art, other equivalent alternatives can be obtained based on these embodiments without creative effort, and all of them should fall within the protection scope of the present invention.

[0013] Example 1 (1) Add 0.02 mol of CH4N2S and 0.01 mol of Na2MoO4 to a mixed solvent of isopropanol / deionized water and mix well. The volume of isopropanol is 50 ml and the volume of deionized water is 10 ml. Transfer the mixed solvent to a high-pressure reactor and react at 150 °C for 15 h to obtain hollow MoS2. (2) After washing and drying MoS2, disperse it in 60 ml of deionized water and mix it evenly; add 0.005 mol Ce(NO3)3·6H2O and 0.01 mol triethylenetetramine and mix it evenly. Transfer the mixture to a high-pressure reactor and react at 160 °C for 12 h to obtain a composite material of hollow MoS2 loaded with CeO2 nanosheets. (3) The composite material, waterborne polyurethane and water prepared in step (2) are mixed in a ratio of 60mg:10mg:300mg and mixed evenly to obtain the surface protection material; (4) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (5) The woven tape is heated and shaped at 150°C to obtain a sheath; (6) Coat the protective material from step (3) on both sides of the sheath and dry it to obtain the braided nylon sheath material.

[0014] Example 2 (1) Add 0.02 mol of CH4N2S and 0.01 mol of Na2MoO4 to a mixed solvent of isopropanol / deionized water and mix well. The volume of isopropanol is 50 ml and the volume of deionized water is 10 ml. Transfer the mixed solvent to a high-pressure reactor and react at 170 °C for 18 h to obtain hollow MoS2. (2) After washing and drying MoS2, disperse it in 60 ml of deionized water and mix it evenly; add 0.005 mol Ce(NO3)3·6H2O and 0.01 mol triethylenetetramine and mix it evenly. Transfer the mixture to a high-pressure reactor and react at 160 °C for 12 h to obtain a composite material of hollow MoS2 loaded with CeO2 nanosheets. (3) The composite material, waterborne polyurethane and water prepared in step (2) are mixed in a ratio of 60mg:10mg:300mg and mixed evenly to obtain the surface protection material; (4) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (5) The woven tape is heated and shaped at 150°C to obtain a sheath; (6) Coat the protective material from step (3) on both sides of the sheath and dry it to obtain the braided nylon sheath material.

[0015] Example 3 (1) Add 0.02 mol of CH4N2S and 0.01 mol of Na2MoO4 to a mixed solvent of isopropanol / deionized water and mix well. The volume of isopropanol is 50 ml and the volume of deionized water is 10 ml. Transfer the mixed solvent to a high-pressure reactor and react at 170 °C for 18 h to obtain hollow MoS2. (2) After washing and drying MoS2, disperse it in 60 ml of deionized water and mix it evenly; add 0.005 mol Ce(NO3)3·6H2O and 0.01 mol triethylenetetramine and mix it evenly. Transfer the mixture to a high-pressure reactor and react at 180 °C for 12 h to obtain a composite material of hollow MoS2 loaded with CeO2 nanosheets. (3) The composite material, waterborne polyurethane and water prepared in step (2) are mixed in a ratio of 50mg:15mg:300mg and mixed evenly to obtain the surface protection material. (4) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (5) The woven tape is heated and shaped at 160°C to obtain a sheath; (6) Coat the protective material from step (3) on both sides of the sheath and dry it to obtain the braided nylon sheath material.

[0016] Comparative Example 1 (1) Add 0.02 mol of CH4N2S and 0.01 mol of Na2MoO4 to a mixed solvent of isopropanol / deionized water and mix well. The volume of isopropanol is 50 ml and the volume of deionized water is 10 ml. Transfer the mixed solvent to a high-pressure reactor and react at 150 °C for 15 h to obtain hollow MoS2. (2) The hollow MoS2, waterborne polyurethane and water prepared in step (1) are mixed in a ratio of 60mg:10mg:300mg and mixed evenly to obtain the surface protection material. (3) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (4) The woven tape is heated and shaped at 150°C to obtain a sheath; (5) Coat both sides of the sheath with a protective material and dry to obtain the braided nylon sheath material.

[0017] Comparative Example 2 (1) Add 0.005 mol Ce(NO3)3·6H2O and 0.01 mol triethylenetetramine to 60 ml of deionized water, mix well, transfer the mixture to a high-pressure reactor, and react at 160 °C for 12 h to obtain CeO2 material. (2) The CeO2 material, waterborne polyurethane and water prepared in step (1) are mixed in a ratio of 60mg:10mg:300mg and mixed evenly to obtain the surface protection material. (3) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (4) The woven tape is heated and shaped at 150°C to obtain a sheath; (5) Coat the protective material from step (2) on both sides of the sheath and dry it to obtain the braided nylon sheath material.

[0018] Comparative Example 3 The difference between it and Comparative Example 1 is that it was not coated with a surface protective material.

[0019] The following performance tests were conducted on the nylon sleeves of Examples 1-3 and Comparative Examples 1-3: The mold resistance test conditions are as follows: The test is conducted in a high and low temperature humidity mold test chamber with a test temperature of 30℃, a relative humidity of 95%, and a test period of 28 days; the test species are: Aspergillus flavus, Aspergillus versicolor, Penicillium flosii, Chaetomium globosum, Aspergillus niger, Aspergillus terreus, and Aspergillus brevis.

[0020] The test conditions for high and low temperature impact test are as follows: (1) Test temperature: low temperature -55℃, high temperature 150℃; (2) Test time: high and low temperatures are maintained for 10h each; (3) Switching time: less than 5min; (4) Number of cycles: 10 times.

[0021] Thermal aging performance test conditions: (1) Test temperature is 150℃; (2) Holding time: 168h; (3) After cooling for 24h, test the tensile strength and elongation at break of the material; The test conditions for tensile strength and elongation at break are as follows: The CMT4303 microcomputer-controlled electronic universal testing machine is used for testing, the initial distance of the tensile clamp is set to 25mm, and the test speed is 500mm / min.

[0022] Wear resistance was tested according to GB / T3960-2016.

[0023]

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a heat-insulating and wear-resistant nylon braided tubing material, characterized in that, Includes the following steps: (1) Weave multiple strands of twisted nylon monofilament and multiple bundles of twisted nylon multifilament to obtain a braided tape; (2) The woven tape is heated and shaped to obtain a sheath; (3) Coat both sides of the sheath with a protective material and dry to obtain the braided nylon tubing material. The preparation method of the surface protective material is as follows: A. Add the sulfur source and molybdenum source to a mixed solvent of isopropanol / water and mix evenly, controlling the volume ratio of isopropanol / water to be (3-5):1; transfer the mixed solvent into a high-pressure reactor and react at 150-180℃ for 12-20h to obtain hollow MoS2. B. After washing and drying MoS2, disperse it in deionized water and mix it evenly; add cerium source and triethylenetetramine and mix evenly. Transfer the mixture to a high-pressure reactor and react at 160-180℃ for 12-20h to obtain a composite material of hollow MoS2 loaded with wrinkled sheet-like CeO2. C. Mix the composite material, binder, and solvent obtained in step B evenly to obtain the surface protection material.

2. The method for preparing a heat-insulating and wear-resistant nylon braided tubing material according to claim 1, wherein the sulfur source is CH4N2S and the molybdenum source is Na2MoO4.

3. The method for preparing a heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, wherein the cerium source is Ce(NO3)3·6H2O.

4. In the method for preparing a heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, the molar ratio of cerium source to triethylenetetramine is 1:(2-3).

5. In the preparation method of the heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, in step C, the mass ratio of the composite material, the binder and the solvent is (50-60):(10-15):(300-500).

6. The method for preparing a heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, wherein the nylon type is one or more of nylon 6, nylon 66, nylon 611, and nylon 612.

7. The method for preparing a heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, wherein the twisted nylon monofilament is obliquely braided, and the twisted nylon multifilament is located between two layers of obliquely braided twisted nylon monofilament, wherein the twisted nylon multifilament is arranged in the warp direction.

8. The method for preparing a heat-insulating and wear-resistant nylon braided sleeve material according to claim 1, wherein the temperature for heating and shaping the braided strip is 140℃~180℃.

9. The method for preparing a heat-insulating and wear-resistant nylon braided tubing material according to claim 1, wherein the binder is one or more of polyvinyl alcohol, polyacrylate and waterborne polyurethane, and the solvent is water.

10. A heat-insulating and wear-resistant nylon braided sleeve material, characterized in that, It is prepared by any one of the methods of claims 1-9.

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