High-performance data connection line and preparation method thereof

Abstract

The invention discloses a high-performance data connection 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 coating 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 coating material prepared by the invention has relatively good mechanical properties, insulation and flame retardant properties, so that the prepared data connecting line has relatively good practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of communication transmission equipment, and in particular to a high-performance data connection line and a preparation method thereof. Background Art

[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 smart phones, tablet computers, laptops, smart homes, automotive electronics and other fields. The performance of data cables directly affects the data transmission rate, stability and service life between devices. Data cables generally include a conductive core and an outer sheath wrapped around the outer surface of the core. The outer sheath can reduce damage to the core and reduce 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 on 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-swing data cable and a preparation method thereof, wherein the high-swing data cable comprises a conductive core, the conductive core is coated with a high-swing TPE material, and the high-swing TPE material is made of the following raw materials in parts by weight: 20-40 parts of SEBS elastomer, 10-20 parts of polypropylene, 5-10 parts of calcium carbonate, 5-10 parts of maleic anhydride, 2-4 parts of grafting aid, and 3-5 parts of anti-wrinkle agent; the preparation method thereof comprises: melt-extrude the high-swing TPE material, and then wrap it on the conductive core, weld the conductive core with a USB connector and a transmission connector, and then injection mold it with the high-swing TPE material to obtain the high-swing data cable, the high-swing data cable of the application has good tensile strength, elongation at break and tear strength, and is not easy to crack; in addition, the preparation method of the application is simple to operate, which helps to further reduce the breakage of the high-swing data cable; the patent only solves the mechanical properties of the data cable, and the flame retardant, thermal conductivity and insulation properties need to be further improved. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-performance data connection line and a preparation method thereof. The data connection line prepared by the present invention has good mechanical, flame retardant, thermal conductive and insulating properties.

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

[0007] Preferably, the preparation method of the composite filler is as follows:

[0008] 1) adding silicon nitride to an ethanol aqueous solution, adding a vinyl silane coupling agent, heating and stirring, cooling and filtering after the reaction is completed, collecting the solid, washing, and drying to obtain activated silicon nitride;

[0009] 2) dissolving 4,4'-diaminobenzylbenzene-disulfonic acid in chloroform, adding an initiator and mixing well, then adding activated silicon nitride, heating for reaction, filtering after the reaction is completed, collecting the solid, washing and drying to obtain flame-retardant modified silicon nitride;

[0010] 3) Dispersing the flame retardant modified silicon nitride in an ethanol aqueous solution, then adding n-butyl titanate and ammonia water thereto, stirring and reacting at room temperature, and after the reaction is completed, centrifuging, washing and drying to obtain a 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°C.

[0012] Preferably, in the 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°C, and the heating time is 6-8h.

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

[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 and zinc stearate.

[0016] Preferably, the antioxidant is a hindered phenol antioxidant and / or a phosphite antioxidant, the hindered phenol 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 preparing the high-performance data connection line, comprising the following steps:

[0018] Weigh each component according to the formula, stir and mix the polypropylene resin, SEBS (hydrogenated styrene-butadiene block copolymer), composite filler, compatibilizer, lubricant and antioxidant, add the mixture into a twin-screw extruder for extrusion to obtain a coating material, then wrap the coating material on the conductive wire core to obtain a transmission wire, cut the transmission wire to a length of 0.5-3m, install a USB connector on one end of the conductive wire core in the transmission wire, install a transmission connector on the other end of the conductive wire core to obtain a prefabricated wire, and injection mold the transmission connector and USB connector of the prefabricated wire with the coating material to obtain a high-performance data connection wire.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The present invention blends SEBS with polypropylene resin, which can significantly improve the toughness of PP, especially the impact resistance under low temperature conditions. By grafting 4,4'-diaminostilbene-disulfonic acid on silicon nitride, an efficient synergistic flame retardant system is formed, which significantly improves the flame retardant performance of the data connection line. In a fire or high temperature environment, the coating material can effectively inhibit the spread of flames and reduce safety hazards; and the introduction of 4,4'-diaminostilbene-disulfonic acid is conducive to enhancing the compatibility between the composite filler and the polypropylene resin, so that the coating material has good mechanical properties; finally, titanium dioxide is in-situ generated on the surface of the flame-retardant modified silicon nitride. Titanium dioxide has good self-cleaning and insulation properties, can reduce the pollution on the surface of the coating material, ensure the stable transmission of high-speed signals, and improve the durability of the data connection line;

[0021] (2) Preparation of the composite filler of the present invention: First, silicon nitride is activated with a vinyl silane coupling agent, carboxyl groups and vinyl groups are introduced on the surface of silicon nitride, and 4,4'-diaminobenzene-disulfonic acid reacts with the vinyl groups on silicon nitride to generate flame-retardant modified silicon nitride, and can form nitrogen, sulfur, and silicon synergistic flame retardant, thereby improving the flame retardant properties of the coating material, and can also improve the compatibility of the composite filler with the polypropylene resin matrix, so that it is evenly dispersed in the polypropylene resin. Finally, titanium dioxide is in situ generated on the surface of the flame-retardant modified silicon nitride. Titanium dioxide has good self-cleaning and insulating properties. By forming an insulating coating on the surface of silicon nitride, filling the gaps, and increasing the interface potential barrier, the charge movement between silicon nitrides is effectively prevented, ensuring that the insulating protective cover has good self-cleaning and electrical insulation properties, reducing the contamination on the surface of the coating material, ensuring the stable transmission of high-speed signals, and improving the durability of the coating material. DETAILED DESCRIPTION

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

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

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

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

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

[0027] Example 1

[0028] A method for preparing a high-performance data connection line comprises 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 were stirred and mixed evenly, and then added to a twin-screw extruder for extrusion to obtain a coating material, and then the coating material was wrapped on the conductive wire core to obtain a transmission line, and the transmission line was cut to a length of 0.8m, a USB connector was installed at one end of the conductive wire core in the transmission line, and a transmission connector was installed at the other end of the conductive wire core to obtain a prefabricated line, and the transmission connector and the USB connector of the prefabricated line were injection molded with the coating material to obtain a high-performance data connection line.

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

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

[0032] 2) 8.5 g of 4,4'-diaminobenzylbenzene-disulfonic acid was dissolved in 200 mL of chloroform, 0.8 g of benzoyl peroxide was added and mixed evenly, and then 4.5 g of activated silicon nitride was added, and the mixture was heated at 50° C. for 7 h. After the reaction was completed, the mixture was filtered, and the solid was collected, washed, and dried to obtain flame-retardant modified silicon nitride;

[0033] 3) 6.7 g of flame retardant modified silicon nitride was dispersed in 150 mL of 50 wt% ethanol aqueous solution, and then 4.2 g of n-butyl titanate and 12 g of 28 wt% ammonia water were added thereto. The mixture was stirred at 30° C. for 3 h. After the reaction was completed, the mixture was centrifuged, washed and dried to obtain a composite filler.

[0034] Example 2

[0035] A method for preparing a high-performance data connection line comprises 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 stirred and mixed evenly, and then added into a twin-screw extruder for extrusion to obtain a coating material, and then the coating material is wrapped on the conductive wire core to obtain a transmission line, and the transmission line is cut to a length of 0.5m, a USB connector is installed at one end of the conductive wire core in the transmission line, and a transmission connector is installed at the other end of the conductive wire core to obtain a prefabricated line, and the transmission connector and the USB connector of the prefabricated line are injection molded with the coating material to obtain a high-performance data connection line.

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

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

[0039] 2) 6 g of 4,4'-diaminobenzylbenzene-disulfonic acid was dissolved in 200 mL of chloroform, 0.5 g of benzoyl peroxide was added and mixed evenly, and then 3 g of activated silicon nitride was added, and the mixture was heated at 40° C. for 8 h. After the reaction was completed, the mixture was filtered, and the solid was collected, washed, and dried to obtain flame-retardant modified silicon nitride;

[0040] 3) 5 g of flame retardant modified silicon nitride was dispersed in 150 mL of 50 wt% ethanol aqueous solution, and then 3 g of n-butyl titanate and 10 g of 28 wt% ammonia water were added thereto. The mixture was stirred and reacted at 40° C. for 2 h. After the reaction was completed, the composite filler was obtained by centrifugation, washing and drying.

[0041] Example 3

[0042] A method for preparing a high-performance data connection line comprises 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 were stirred and mixed evenly, and then added to a twin-screw extruder for extrusion to obtain a coating material, and then the coating material was wrapped on the conductive wire core to obtain a transmission line, and the transmission line was cut to a length of 0.8m, a USB connector was installed at one end of the conductive wire core in the transmission line, and a transmission connector was installed at the other end of the conductive wire core to obtain a prefabricated line, and the transmission connector and USB connector of the prefabricated line were injection molded with the coating material to obtain a high-performance data connection line.

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

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

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

[0047] 3) 8 g of flame retardant modified silicon nitride was dispersed in 150 mL of 50 wt% ethanol aqueous solution, and then 5 g of n-butyl titanate and 15 g of 28 wt% ammonia water were added thereto. The mixture was stirred at 30° C. for 3 h. After the reaction was completed, the mixture was centrifuged, washed and dried to obtain a composite filler.

[0048] Comparative Example 1

[0049] A method for preparing a high-performance data connection line is similar to that of Example 1, except that the composite filler is flame-retardant modified silicon nitride, and specifically comprises 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 were stirred and mixed evenly, and then added to a twin-screw extruder for extrusion to obtain a coating material, and then the coating material was wrapped on the conductive wire core to obtain a transmission line, and the transmission line was cut to a length of 0.8m, a USB connector was installed at one end of the conductive wire core in the transmission line, and a transmission connector was installed at the other end of the conductive wire core to obtain a prefabricated line, and the transmission connector and the USB connector of the prefabricated line were injection molded with the coating material to obtain a high-performance data connection line.

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

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

[0053] 2) 8.5 g of 4,4'-diaminostilbene-disulfonic acid was dissolved in 200 mL of chloroform, 0.8 g of benzoyl peroxide was added and mixed evenly, and then 4.5 g of activated silicon nitride was added, and the mixture was heated at 50° C. for 7 h. After the reaction was completed, the mixture was filtered, and the solid was collected, washed, and dried to obtain flame-retardant modified silicon nitride, which was a composite filler.

[0054] Comparative Example 2

[0055] A method for preparing a high-performance data connection line is similar to that of Example 1, except that the filler is silicon nitride, and specifically comprises 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 were stirred and mixed evenly, and then added to a twin-screw extruder for extrusion to obtain a coating material, and then the coating material was wrapped on the conductive wire core to obtain a transmission line, and the transmission line was cut to a length of 0.8m, a USB connector was installed at one end of the conductive wire core in the transmission line, and a transmission connector was installed at the other end of the conductive wire core to obtain a prefabricated line, and the transmission connector and USB connector of the prefabricated line were injection molded with the coating material to obtain a high-performance data connection line.

[0057] Performance Testing

[0058] The coating materials prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests, wherein the tensile strength was tested in accordance with GB / T1040.2-2022, the sample was type 1A, and the test speed was 50 mm / min; the volume resistivity was tested in accordance with GB / T31838.2-2019, and the limiting oxygen index test was tested in accordance with GB / T2406.3-2022. The test results are shown in the following table:

[0059]

[0060]

[0061] It can be seen from the experimental data in the above table that the coating material prepared by the present invention has good mechanical, insulation and flame retardant properties, so that the prepared data connection line has good practicality.

[0062] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the patent protection scope of the present invention.

Claims

1. A high-performance data connection line, characterized in that: It comprises a conductive core and a coating material coated on the conductive core; the coating material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 20-40 parts of SEBS, 15-25 parts of composite filler, 2-3 parts of compatibilizer, 1-2 parts of lubricant, and 0.5-1 part of antioxidant.

2. The high performance data connection line according to claim 1, characterized in that: The preparation method of the composite filler is as follows: 1) adding silicon nitride to an ethanol aqueous solution, adding a vinyl silane coupling agent, heating and stirring, cooling and filtering after the reaction is completed, collecting the solid, washing, and drying to obtain activated silicon nitride; 2) dissolving 4,4'-diaminobenzylbenzene-disulfonic acid in chloroform, adding an initiator and mixing well, then adding activated silicon nitride, heating for reaction, filtering after the reaction is completed, collecting the solid, washing and drying to obtain flame-retardant modified silicon nitride; 3) Dispersing the flame retardant modified silicon nitride in an ethanol aqueous solution, then adding n-butyl titanate and ammonia water thereto, stirring and reacting at room temperature, and after the reaction is completed, centrifuging, washing and drying to obtain a composite filler.

3. The high performance data connection cable according to claim 2, characterized in that: In the 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°C.

4. The high performance data connection cable according to claim 2, characterized in that: In the step 2), the mass ratio of 4,4'-diaminostilbene-disulfonic acid, initiator, and activated silicon nitride is 6-10:0.5-1:3-5.

5. The high performance data connection line according to claim 4, characterized in that: The initiator is one of benzoyl peroxide and azobisisobutyronitrile.

6. The high performance data connection line according to claim 2, characterized in that: In the step 3), the mass ratio of flame retardant modified silicon nitride, n-butyl titanate and aqueous ammonia is 5-8:3-5:10-15; the concentration of aqueous ammonia is 25-28wt%.

7. The high performance data connection line 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.

8. The high performance data connection cable according to claim 1, characterized in that: The lubricant is one of zinc stearate and zinc stearate.

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

10. A method for preparing the high-performance data connection line according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: weighing each component according to a formula, stirring and mixing polypropylene resin, SEBS, composite filler, compatibilizer, lubricant and antioxidant, and then adding the mixture into a twin-screw extruder to extrude the mixture to obtain a coating material, then wrapping the coating material on a conductive wire core to obtain a transmission wire, cutting the transmission wire to a length of 0.5-3m, installing a USB connector at one end of the conductive wire core in the transmission wire, installing a transmission connector at the other end of the conductive wire core to obtain a prefabricated wire, and injection molding the transmission connector and the USB connector of the prefabricated wire with the coating material to obtain a high-performance data connection wire.

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