High performance data connector and method of making same

Abstract

The application discloses a high-performance data connecting line and a preparation method thereof, and belongs to the technical field of communication transmission equipment. The high-performance data connecting line comprises a conductive wire core and a coating material covering the conductive wire core. The coating material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 20-40 parts of SEBS, 5-10 parts of composite filler, 2-3 parts of a compatilizer, 1-2 parts of a lubricant, and 0.5-1 part of an antioxidant. The prepared coating material has good mechanical properties, insulation and flame-retardant properties, so that the prepared data connecting line has good practicability.

Description

Technical Field

[0001] This invention relates to the field of communication transmission equipment technology, and specifically to a high-performance data connection cable and its manufacturing method. Background Technology

[0002] With the rapid development of modern electronic devices, data cables, as an important medium for transmitting data and power between electronic devices, are widely used in smartphones, tablets, laptops, smart homes, automotive electronics, and other fields. The performance of data cables directly affects the data transmission rate, stability, and lifespan between devices. Data cables generally consist of conductive wires and an outer sheath covering the outer surface of the wires. The outer sheath reduces damage to the wires and also reduces the risk of electric shock to users.

[0003] In recent years, with the popularization of 5G communication technology, the Internet of Things and high-performance computing devices, users have put forward higher requirements for the performance of data connection cables, including faster transmission rates, higher durability, stronger anti-interference capabilities and better compatibility.

[0004] Chinese patent document CN11297989A discloses a high-sway data cable and its preparation method. The high-sway data cable includes a conductive core coated with a high-sway TPE material. The high-sway TPE material is made from the following raw materials in parts by weight: 20-40 parts SEBS elastomer, 10-20 parts polypropylene, 5-10 parts calcium carbonate, 5-10 parts maleic anhydride, 2-4 parts grafting agent, and 3-5 parts anti-wrinkle agent. The preparation method involves melting and extruding the high-sway TPE material, then wrapping it around the conductive core, welding the conductive core to a USB connector and a transmission connector, and then injection molding it with the high-sway TPE material to obtain the high-sway data cable. The high-sway data cable of this application has good tensile strength, elongation at break, and tear resistance, and is not easy to crack. In addition, the preparation method of this application is simple to operate, which helps to further reduce the breakage of the high-sway data cable. This patent only solves the mechanical properties of the data cable; the flame retardant, thermal conductivity, and insulation properties need to be further improved. Summary of the Invention

[0005] The main objective of this invention is to propose a high-performance data cable and its preparation method. The data cable prepared by this invention has good mechanical, flame-retardant, thermal conductivity and insulation properties.

[0006] To achieve the above objectives, the present invention proposes a high-performance data connection cable, comprising a conductive core and a coating material covering the conductive core; the coating material comprises the following components in parts by weight: 60-80 parts polypropylene resin, 20-40 parts SEBS, 15-25 parts composite filler, 2-3 parts compatibilizer, 1-2 parts lubricant, and 0.5-1 part antioxidant.

[0007] Preferably, the composite filler is prepared by the following method:

[0008] 1) Add silicon nitride to an aqueous ethanol solution, add vinylsilane coupling agent, heat and stir, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride;

[0009] 2) Dissolve 4,4'-diaminostilbene-disulfonic acid in chloroform, add an initiator and mix well, then add activated silicon nitride, heat to react, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride.

[0010] 3) Disperse flame-retardant modified silicon nitride in an aqueous ethanol solution, then add tetrabutyl titanate and ammonia, stir and react at room temperature. After the reaction is complete, centrifuge, wash and dry to obtain the composite filler.

[0011] Preferably, in step 1), the mass ratio of silicon nitride to vinyl silane coupling agent is 10-20:3-5; and the heating temperature is 40-60℃.

[0012] Preferably, in step 2), the mass ratio of 4,4'-diaminostilbene-disulfonic acid, initiator, and activated silicon nitride is 6-10:0.5-1:3-5; the initiator is one of benzoyl peroxide and azobisisobutyronitrile; the heating temperature is 40-60℃, and the heating time is 6-8h.

[0013] Preferably, in step 3), the mass ratio of flame-retardant modified silicon nitride, tetrabutyl titanate, and ammonia is 5-8:3-5:10-15; and the concentration of ammonia is 25-28 wt%.

[0014] Preferably, the compatibilizer is at least one of PE-g-MAH, PP-g-MA, EVA-g-MAH, POE-g-MAH, and EPDM-g-MA.

[0015] Preferably, the lubricant is one of zinc stearate or zinc stearate.

[0016] Preferably, the antioxidant is a hindered phenolic antioxidant and / or a phosphite antioxidant, wherein the hindered phenolic antioxidant is at least one of antioxidant-1010, antioxidant-736, antioxidant-264, antioxidant-1098, and antioxidant-300, and the phosphite antioxidant is at least one of antioxidant-168, antioxidant-618, and antioxidant-626.

[0017] The present invention also discloses a method for manufacturing the high-performance data connection cable, comprising the following steps:

[0018] Weigh each component according to the formula, mix polypropylene resin, SEBS (hydrogenated styrene-butadiene block copolymer), composite filler, compatibilizer, lubricant, and antioxidant evenly, and then extrude them into a twin-screw extruder to obtain a coating material. Then wrap the coating material around the conductive core to obtain a transmission line. Cut the transmission line to a length of 0.5-3m, install a USB connector on one end of the conductive core inside the transmission line, and install a transmission connector on the other end of the conductive core to obtain a pre-made line. Inject mold the transmission connector and USB connector of the pre-made line with the coating material to obtain a high-performance data connection line.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1) This invention blends SEBS with polypropylene resin, which can significantly improve the toughness of PP, especially its impact resistance under low-temperature conditions. By grafting 4,4'-diaminostilbene-disulfonic acid onto silicon nitride, a highly efficient synergistic flame-retardant system is formed, which significantly improves the flame-retardant performance of the data cable. In fire or high-temperature environments, the coating material can effectively suppress flame propagation and reduce safety hazards. Furthermore, the introduction of 4,4'-diaminostilbene-disulfonic acid helps to enhance the compatibility between the composite filler and polypropylene resin, giving the coating material good mechanical properties. Finally, titanium dioxide is generated in situ on the surface of the flame-retardant modified silicon nitride. Titanium dioxide has good self-cleaning and insulation properties, which can reduce contamination on the surface of the coating material, ensure stable transmission of high-speed signals, and improve the durability of the data cable.

[0021] (2) The preparation of the composite filler of the present invention firstly activates silicon nitride with a vinyl silane coupling agent, introduces carboxyl groups and vinyl groups on the surface of silicon nitride, and 4,4'-diaminostilbene-disulfonic acid reacts with the vinyl groups on silicon nitride to generate flame-retardant modified silicon nitride, and can form a nitrogen, sulfur and silicon synergistic flame retardant, which improves the flame retardant performance of the coating material, and also improves the compatibility of the composite filler with the polypropylene resin matrix, so that it is uniformly dispersed in the polypropylene resin. Finally, titanium dioxide is generated in situ on the surface of the flame-retardant modified silicon nitride. Titanium dioxide has good self-cleaning and insulation properties. By forming an insulating coating on the surface of silicon nitride, filling gaps and increasing the interfacial barrier, it effectively prevents the charge movement between silicon nitrides, ensures that the insulating protective sleeve has good self-cleaning and electrical insulation properties, reduces the contamination on the surface of the coating material, ensures the stable transmission of high-speed signals, and improves the durability of the coating material. Detailed Implementation

[0022] To avoid unnecessary details, unless otherwise specified, all items used in the following examples are commercially available products, and all methods used are conventional methods unless otherwise specified.

[0023] The sources of some of the raw materials used in this invention are as follows:

[0024] Polypropylene resin, Lanzhou Petrochemical, melt flow rate of plastic is 16-20g / 10min, tensile yield strength ≥31.5MPa.

[0025] SEBS, brand name Sinopec Baling, grade YH-533, melt flow rate of 16g / 10min, purchased from Foshan Ruisheng Plastics Co., Ltd.

[0026] Silicon nitride, 800 mesh, purchased from Hebei Teng Shuang Metal Materials Co., Ltd.

[0027] Example 1

[0028] A method for fabricating a high-performance data cable includes the following steps:

[0029] 70g of polypropylene resin, 30g of SEBS, 20g of composite filler, 2.5g of PE-g-MAH, 1.5g of zinc stearate, and 0.8g of antioxidant-1010 are mixed evenly and then extruded in a twin-screw extruder to obtain a coating material. The coating material is then wrapped around a conductive core to obtain a transmission line. The transmission line is cut to a length of 0.8m. A USB connector is installed at one end of the conductive core inside the transmission line, and a transmission connector is installed at the other end of the conductive core to obtain a prefabricated line. The transmission connector and USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection cable.

[0030] The preparation method of the composite filler is as follows:

[0031] 1) Add 15g of silicon nitride to 200mL of 50wt% ethanol aqueous solution, add 4.2g of vinyltrimethoxysilane, heat and stir at 60℃ for 2h, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride.

[0032] 2) Dissolve 8.5g of 4,4'-diaminostilbene-disulfonic acid in 200mL of chloroform, add 0.8g of benzoyl peroxide and mix well, then add 4.5g of activated silicon nitride, heat at 50℃ for 7h, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride.

[0033] 3) Disperse 6.7g of flame-retardant modified silicon nitride in 150mL of 50wt% ethanol aqueous solution, then add 4.2g of tetrabutyl titanate and 12g of 28wt% ammonia water, stir and react at 30℃ for 3h. After the reaction is completed, centrifuge, wash and dry to obtain the composite filler.

[0034] Example 2

[0035] A method for fabricating a high-performance data cable includes the following steps:

[0036] 60g of polypropylene resin, 20g of SEBS, 15g of composite filler, 2g of PP-g-MA, 1g of zinc stearate, and 0.5g of antioxidant-168 are mixed evenly and then extruded in a twin-screw extruder to obtain a coating material. The coating material is then wrapped around a conductive core to obtain a transmission line. The transmission line is cut to a length of 0.5m. A USB connector is installed at one end of the conductive core inside the transmission line, and a transmission connector is installed at the other end of the conductive core to obtain a prefabricated line. The transmission connector and USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection cable.

[0037] The preparation method of the composite filler is as follows:

[0038] 1) Add 10g of silicon nitride to 200mL of 50wt% ethanol aqueous solution, add 3g of vinyltrimethoxysilane, heat and stir at 40℃ for 2h, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride.

[0039] 2) Dissolve 6g of 4,4'-diaminostilbene-disulfonic acid in 200mL of chloroform, add 0.5g of benzoyl peroxide and mix well, then add 3g of activated silicon nitride, heat at 40℃ for 8h, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride.

[0040] 3) Disperse 5g of flame-retardant modified silicon nitride in 150mL of 50wt% ethanol aqueous solution, then add 3g of tetrabutyl titanate and 10g of 28wt% ammonia water, stir and react at 40℃ for 2h. After the reaction is completed, centrifuge, wash and dry to obtain the composite filler.

[0041] Example 3

[0042] A method for fabricating a high-performance data cable includes the following steps:

[0043] 70g of polypropylene resin, 30g of SEBS, 25g of composite filler, 2.5g of PE-g-MAH, 1.5g of calcium stearate, and 0.8g of antioxidant-1010 are mixed evenly and then extruded in a twin-screw extruder to obtain a coating material. The coating material is then wrapped around a conductive core to obtain a transmission line. The transmission line is cut to a length of 0.8m. A USB connector is installed at one end of the conductive core inside the transmission line, and a transmission connector is installed at the other end of the conductive core to obtain a prefabricated line. The transmission connector and USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection cable.

[0044] The preparation method of the composite filler is as follows:

[0045] 1) Add 20g of silicon nitride to 200mL of 50wt% ethanol aqueous solution, add 5g of vinyltrimethoxysilane, heat and stir at 40℃ for 4h, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride.

[0046] 2) Dissolve 10g of 4,4'-diaminostilbene-disulfonic acid in 200mL of chloroform, add 1g of azobisisobutyronitrile and mix well, then add 5g of activated silicon nitride, heat at 60℃ for 6h, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride.

[0047] 3) Disperse 8g of flame-retardant modified silicon nitride in 150mL of 50wt% ethanol aqueous solution, then add 5g of tetrabutyl titanate and 15g of 28wt% ammonia water, stir and react at 30℃ for 3h. After the reaction is completed, centrifuge, wash and dry to obtain the composite filler.

[0048] Comparative Example 1

[0049] A method for preparing a high-performance data connection cable, similar to Example 1, except that the composite filler is flame-retardant modified silicon nitride, specifically includes the following steps:

[0050] 70g of polypropylene resin, 30g of SEBS, 20g of composite filler, 2.5g of PE-g-MAH, 1.5g of zinc stearate, and 0.8g of antioxidant-1010 are mixed evenly and then extruded in a twin-screw extruder to obtain a coating material. The coating material is then wrapped around a conductive core to obtain a transmission line. The transmission line is cut to a length of 0.8m. A USB connector is installed at one end of the conductive core inside the transmission line, and a transmission connector is installed at the other end of the conductive core to obtain a prefabricated line. The transmission connector and USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection cable.

[0051] The preparation method of the composite filler is as follows:

[0052] 1) Add 15g of silicon nitride to 200mL of 50wt% ethanol aqueous solution, add 4.2g of vinyltrimethoxysilane, heat and stir at 60℃ for 2h, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride.

[0053] 2) Dissolve 8.5g of 4,4'-diaminostilbene-disulfonic acid in 200mL of chloroform, add 0.8g of benzoyl peroxide and mix well, then add 4.5g of activated silicon nitride, heat at 50℃ for 7h, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride, which is the composite filler.

[0054] Comparative Example 2

[0055] A method for fabricating a high-performance data connection cable, similar to Example 1, except that the filler is silicon nitride, specifically includes the following steps:

[0056] 70g of polypropylene resin, 30g of SEBS, 20g of silicon nitride, 2.5g of PE-g-MAH, 1.5g of zinc stearate, and 0.8g of antioxidant-1010 are mixed evenly and then extruded in a twin-screw extruder to obtain a coating material. The coating material is then wrapped around a conductive core to obtain a transmission line. The transmission line is cut to a length of 0.8m. A USB connector is installed at one end of the conductive core inside the transmission line, and a transmission connector is installed at the other end of the conductive core to obtain a prefabricated line. The transmission connector and USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection cable.

[0057] Performance testing

[0058] The coating materials prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests. Tensile strength was tested according to GB / T1040.2-2022, using type 1A specimens at a test speed of 50 mm / min. Volume resistivity was tested according to GB / T31838.2-2019, and limiting oxygen index was tested according to GB / T2406.3-2022. The test results are shown in the table below:

[0059]

[0060]

[0061] As can be seen from the experimental data in the table above, the coating material prepared by this invention has good mechanical, insulating and flame-retardant properties, making the data connection cable prepared by this invention more practical.

[0062] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the patent protection scope of the present invention.

Claims

1. A high-performance data connection cable, characterized in that, It includes a conductive wire core and a coating material covering the conductive wire core; the coating material includes the following components in parts by weight: 60-80 parts polypropylene resin, 20-40 parts SEBS, 15-25 parts composite filler, 2-3 parts compatibilizer, 1-2 parts lubricant, and 0.5-1 part antioxidant. The preparation method of the composite filler is as follows: 1) Add silicon nitride to an aqueous ethanol solution, add vinylsilane coupling agent, heat and stir, cool and filter after the reaction is complete, collect the solid, wash and dry to obtain activated silicon nitride; 2) Dissolve 4,4'-diaminostilbene-disulfonic acid in chloroform, add an initiator and mix well, then add activated silicon nitride, heat to react, filter after the reaction is complete, collect the solid, wash and dry to obtain flame-retardant modified silicon nitride. 3) Disperse flame-retardant modified silicon nitride in an aqueous ethanol solution, then add tetrabutyl titanate and ammonia, stir the reaction at room temperature, and after the reaction is complete, centrifuge, wash and dry to obtain the composite filler; In step 1), the mass ratio of silicon nitride to vinyl silane coupling agent is 10-20:3-5; the heating temperature is 40-60℃. In step 2), the mass ratio of 4,4'-diaminostilbene-disulfonic acid, initiator, and activated silicon nitride is 6-10:0.5-1:3-5. In step 3), the mass ratio of flame-retardant modified silicon nitride, tetrabutyl titanate, and ammonia is 5-8:3-5:10-15; and the concentration of ammonia is 25-28 wt%.

2. The high-performance data connection cable according to claim 1, characterized in that: The initiator is one of benzoyl peroxide and azobisisobutyronitrile.

3. The high-performance data connection cable according to claim 1, characterized in that: The compatibilizer is at least one of PE-g-MAH, PP-g-MA, EVA-g-MAH, POE-g-MAH, and EPDM-g-MA.

4. The high-performance data connection cable according to claim 1, characterized in that: The lubricant is zinc stearate.

5. The high-performance data connection cable according to claim 1, characterized in that: The antioxidant is a hindered phenolic antioxidant and / or a phosphite antioxidant.

6. A method for manufacturing a high-performance data connection cable according to any one of claims 1-5, characterized in that, The process includes the following steps: Weigh each component according to the formula, mix polypropylene resin, SEBS, composite filler, compatibilizer, lubricant, and antioxidant evenly, and then add them to a twin-screw extruder to extrude and obtain a coating material. Then, wrap the coating material around a conductive core to obtain a transmission line. Cut the transmission line to a length of 0.5-3m, install a USB connector on one end of the conductive core inside the transmission line, and install a transmission connector on the other end of the conductive core to obtain a prefabricated line. Inject the transmission connector and USB connector of the prefabricated line with the coating material to obtain a high-performance data connection line.

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