Anti-electromagnetic wave interference data line and preparation method thereof

Abstract

The invention discloses an anti-electromagnetic wave interference data line and a preparation method thereof, relates to the technical field of data lines, and aims to solve the problems that the data transmission quality is reduced and even data errors or communication faults are caused due to the fact that a traditional flexible flat cable in the prior art is prone to being interfered by electromagnetic waves. The data line main body comprises a wire core, a hot melt adhesive film and a reinforcing plate, the wire core is composed of a metal conductor, a wave absorbing layer, an insulating layer and an anti-electromagnetic wave interference layer, the wave absorbing layer is arranged on the outer side of the metal conductor, the insulating layer is arranged on the outer side of the wave absorbing layer, the anti-electromagnetic wave interference layer is arranged on the outer side of the insulating layer, and the reinforcing plate is arranged on the outer side of the insulating layer. The wave-absorbing layer is made of unsaturated polyester resin, a curing agent, a flame retardant, an additive, a stabilizer and wave-absorbing powder, and the insulating layer is made of a high-performance polyimide film material.

Description

Technical Field

[0001] The present invention relates to the technical field of data lines, and in particular to a data line resistant to electromagnetic wave interference and a preparation method thereof. Background Art

[0002] FFC data cable is a kind of data cable. FFC data cable is also called flexible flat cable. It is a new type of data cable made of PET insulating material and extremely thin flat copper wire substrate conductor. It is soft, can be bent and folded at will, thin, small, simple to connect, easy to disassemble, easy to solve electromagnetic interference and other advantages. Flexible flat cable can arbitrarily choose the number and spacing of wires, making wiring more convenient, greatly reducing the size of electronic products, reducing production costs, and improving production efficiency. It is most suitable for data transmission cables between mobile parts and motherboards, between printed circuit boards (PCB boards), and in miniaturized electrical equipment. It can be widely used in the connection between various printer print heads and motherboards, plotters, scanners, copiers, audio, mobile phones, cars, LCD appliances, fax machines, various DVD players and other products for signal transmission and board-to-board connection. It is an indispensable component in modern electrical equipment.

[0003] For example, the authorized patent with announcement number CN220137958U (a flexible flat cable): includes a cable housing, a cable core is installed in the cable housing, both sides of the cable housing surface are sleeved with fixed sleeves, both ends of the cable housing are sleeved with protective structures, the protective structure includes a protective shell, an adjustment structure and a fixed structure, and movable shells are installed on both sides of the protective shell through the adjustment structure;

[0004] Although the above-mentioned prior art is convenient for protecting the cable core exposed at the end of the cable casing, in a complex electromagnetic environment, traditional flexible flat cables are often easily interfered by electromagnetic waves, resulting in a decrease in data transmission quality and even causing data errors or communication failures; therefore, the market urgently needs to develop a data cable that is resistant to electromagnetic interference and a preparation method thereof to help people solve existing problems. Summary of the invention

[0005] The purpose of the present invention is to provide a data cable resistant to electromagnetic interference and a preparation method thereof, so as to solve the problem that the traditional flexible flat cable mentioned in the above background technology is often easily interfered by electromagnetic waves, resulting in reduced data transmission quality and even causing data errors or communication failures.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a data cable that is resistant to electromagnetic interference, comprising a data cable body, wherein the data cable body comprises a wire core, a hot-melt adhesive film and a reinforcing plate, wherein the wire core is composed of a metal conductor, an absorbing layer, an insulating layer and an anti-electromagnetic interference layer, wherein the absorbing layer is arranged on the outside of the metal conductor, the insulating layer is arranged on the outside of the absorbing layer, and the anti-electromagnetic interference layer is arranged on the outside of the insulating layer.

[0007] Preferably, the wave-absorbing layer is made of unsaturated polyester resin, curing agent, flame retardant, additive, stabilizer and wave-absorbing powder material.

[0008] Preferably, the insulating layer is made of high-performance polyimide film material.

[0009] Preferably, the anti-electromagnetic wave interference layer is made of a nano-composite material, and the nano-composite material is made of nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive.

[0010] Preferably, the nano-scale metal oxide particles include ferrite and titanate.

[0011] Preferably, the high molecular polymer matrix is ​​a thermoplastic or thermosetting polymer.

[0012] Preferably, the hot melt adhesive film covers the outside of the wire core, and the reinforcing plates are arranged at both ends below the hot melt adhesive film.

[0013] Preferably, the hot melt adhesive film is composed of a PET film, ink and a hot melt type flame retardant polyester, and the ink and the hot melt type flame retardant polyester are coated on the PET film.

[0014] Preferably, the metal conductor is a flat copper wire substrate conductor that is nickel-plated or gold-plated to enhance its electrical conductivity and corrosion resistance.

[0015] A method for preparing a data line resistant to electromagnetic wave interference comprises the following steps:

[0016] S1: Prepare the conductor, select flat copper wire as the metal conductor material, nickel-plate the copper wire as a whole and then plate gold at both ends;

[0017] S2: preparing an absorbing layer, mixing an unsaturated polyester resin, a curing agent, a flame retardant, an additive, a stabilizer and an absorbing powder in a ratio of 55:20:10:3:1:11 to form an absorbing material, and then uniformly coating the absorbing material on the surface of the metal conductor by extrusion, coating or spraying to form an absorbing layer;

[0018] S3: Wrapping the insulation layer, through the hot pressing process, the high-performance polyimide film material is evenly coated on the outside of the metal conductor to form an insulation layer;

[0019] S4: preparing an anti-electromagnetic interference layer, mixing nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive in a ratio of 60:36:4 to form an anti-electromagnetic interference composite material, and then uniformly coating the anti-electromagnetic interference composite material on the outside of the insulating layer by extrusion, coating or spraying to form an anti-electromagnetic interference layer to obtain a wire core;

[0020] S5: Wrapping with hot melt adhesive film, arranging a certain number of wire cores neatly at predetermined intervals, and evenly coating them with hot melt adhesive film, and closely combining the hot melt adhesive film and the wire cores through a hot pressing process to form a data cable;

[0021] S6: Install a reinforcement plate at both ends of the data cable, and fix the reinforcement plate and the data cable together through a hot pressing process.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The invention integrates a metal conductor, an absorbing layer, an insulating layer and an anti-electromagnetic interference layer through the provision of a wire core structure, thereby forming a solid electromagnetic protection barrier. The absorbing layer can absorb and dissipate most electromagnetic waves, significantly reducing the interference intensity. The insulating layer ensures electrical isolation and prevents current leakage. The anti-electromagnetic interference layer further enhances the anti-interference ability of the data line, ensuring the stability and accuracy of data transmission even in a strong electromagnetic environment. Furthermore, this anti-electromagnetic interference data line has advantages in complex electromagnetic environments, can improve the quality of data transmission, reduce the occurrence of data errors and communication failures, and provide a strong guarantee for the reliability and stability of data transmission.

[0024] (2) The invention has an absorbing layer made of unsaturated polyester resin, curing agent, flame retardant, additive, stabilizer and absorbing powder. It can efficiently absorb the electromagnetic wave energy projected onto its surface and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material, thereby achieving the purpose of resisting electromagnetic wave interference. The use of this absorbing material also improves the overall protection performance of the data line, so that it can still maintain stable transmission performance when facing strong electromagnetic interference.

[0025] (3) The invention adopts a nano-composite material to make the anti-electromagnetic interference layer, and the nano-composite material is a mixture of nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive. The metal oxide particles have good electromagnetic wave absorption performance and can absorb and consume the electromagnetic waves incident on the cable. The conductive additive is used to improve the conductivity of the material. At the same time, the addition of the high molecular polymer matrix also provides sufficient flexibility and mechanical strength, further enhancing its anti-electromagnetic interference effect. The use of nano-composite materials can improve the anti-electromagnetic interference ability of the data line, so that it can still maintain stable transmission performance in the face of complex electromagnetic environments, so that the data line can maintain excellent anti-electromagnetic interference ability while still having good bending performance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a data line resistant to electromagnetic interference according to the present invention;

[0027] Figure 2 A cross-sectional view of a data line resistant to electromagnetic interference according to the present invention;

[0028] Figure 3 It is a schematic structural diagram of the hot melt adhesive film of the present invention;

[0029] Figure 4 is a cross-sectional view of the wire core of the present invention;

[0030] Figure 5 It is a schematic diagram of the process of the present invention.

[0031] In the figure: 1. Wire core; 2. Hot melt adhesive film; 3. Reinforcement plate; 4. PET film; 5. Ink; 6. Hot melt flame retardant polyester; 7. Metal conductor; 8. Absorbing layer; 9. Insulating layer; 10. Anti-electromagnetic interference layer. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figure 1-5 An embodiment of the present invention provides: an electromagnetic interference-resistant data line, comprising a data line body, the data line body comprising a wire core 1, a hot melt adhesive film 2 and a reinforcing plate 3, the wire core 1 is composed of a metal conductor 7, an absorbing layer 8, an insulating layer 9 and an electromagnetic interference-resistant layer 10, the absorbing layer 8 is arranged on the outside of the metal conductor 7, the insulating layer 9 is arranged on the outside of the absorbing layer 8, and the electromagnetic interference-resistant layer 10 is arranged on the outside of the insulating layer 9.

[0034] When in use, the wire core structure is set up to integrate the metal conductor 7, the absorbing layer 8, the insulating layer 9 and the anti-electromagnetic interference layer 10 to form a solid electromagnetic protection barrier. The absorbing layer 8 can absorb and dissipate most of the electromagnetic waves, significantly reducing the interference intensity. The insulating layer 9 ensures electrical isolation and prevents current leakage, while the anti-electromagnetic interference layer 10 further enhances the anti-interference ability of the data line, ensuring the stability and accuracy of data transmission even in a strong electromagnetic environment. Furthermore, this data line that is resistant to electromagnetic interference has advantages in complex electromagnetic environments, can improve the quality of data transmission, reduce the occurrence of data errors and communication failures, and provide a strong guarantee for the reliability and stability of data transmission.

[0035] See also Figure 4 The wave-absorbing layer 8 is made of unsaturated polyester resin, curing agent, flame retardant, additive, stabilizer and wave-absorbing powder material to form a material layer with wave-absorbing function.

[0036] The setting of the absorbing layer 8 can efficiently absorb the electromagnetic wave energy projected onto its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material, thereby achieving the purpose of resisting electromagnetic wave interference. The use of this absorbing material also improves the overall protection performance of the data line, so that it can still maintain stable transmission performance when facing strong electromagnetic interference.

[0037] See also Figure 4 The insulating layer 9 is made of high-performance polyimide film material, which not only ensures insulation performance but also has certain flexibility.

[0038] The high-performance polyimide film material has excellent insulation and heat resistance, and can effectively prevent current leakage and short circuit. At the same time, the material also has a certain flexibility, which makes the data line less likely to be damaged when bent and folded, thereby improving the durability and reliability of the data line.

[0039] See also Figure 4 The anti-electromagnetic interference layer 10 is made of a nano-composite material, and the nano-composite material is made of nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive. The metal oxide particles have good electromagnetic wave absorption performance and can absorb and consume the electromagnetic waves incident on the cable. The conductive additive is used to improve the conductivity of the material and further enhance its anti-electromagnetic interference effect.

[0040] The use of nano-composite materials can improve the data line's ability to resist electromagnetic interference, allowing it to maintain stable transmission performance in the face of complex electromagnetic environments. At the same time, the addition of a high molecular polymer matrix also provides sufficient flexibility and mechanical strength, allowing the data line to maintain excellent anti-electromagnetic interference capabilities while still having good bending performance and durability.

[0041] See also Figure 4 , nano-scale metal oxide particles include ferrite and titanate, materials with excellent electromagnetic wave absorption and reflection capabilities.

[0042] Nanoscale metal oxide particles such as ferrite and titanate have high efficiency in electromagnetic wave absorption and reflection capabilities, which can further enhance the data line's resistance to electromagnetic interference. The use of this material also improves the overall protection performance of the data line, enabling it to maintain stable transmission performance even in the face of strong electromagnetic interference.

[0043] See also Figure 4 , the polymer matrix is ​​a thermoplastic or thermosetting polymer with good processing properties and thermal stability.

[0044] Thermoplastic or thermosetting polymers as high molecular polymer matrices can provide good processing performance and thermal stability, making the preparation process of data cables simpler and more efficient. At the same time, the use of this material also improves the overall performance and durability of the data cables.

[0045] See also Figure 2 The hot melt adhesive film 2 covers the outside of the wire core 1 , and the hot melt adhesive film 2 exposes the metal conductors at both ends of the cable as needed, and the reinforcing plates 3 are arranged at both ends below the hot melt adhesive film 2 .

[0046] The use of hot-melt adhesive film can enhance the overall structural strength of the data cable and improve the durability and reliability of the data cable. At the same time, the addition of the reinforcement plate further enhances the protection performance of the data cable, so that both ends of the data cable can still maintain stable transmission performance when facing external impact and extrusion.

[0047] See also Figure 3 The hot melt adhesive film 2 is composed of a PET film 4, ink 5 and a hot melt type flame retardant polyester 6, and the ink 5 and the hot melt type flame retardant polyester 6 are coated on the PET film 4.

[0048] The combined use of PET film, ink and hot-melt flame-retardant polyester can significantly improve the overall performance of the hot-melt adhesive film, making the hot-melt adhesive film have good insulation, flame retardancy, high temperature resistance, low temperature resistance, high voltage resistance and other properties. This high-performance hot-melt adhesive film can further improve the overall protection performance and durability of the data cable.

[0049] See also Figure 4 The metal conductor 7 is a flat copper wire substrate conductor that is nickel-plated and gold-plated to enhance its conductivity and corrosion resistance.

[0050] As a metal conductor material, flat copper wire has excellent conductivity and mechanical strength, which can meet the requirements of data lines for transmission speed and stability. At the same time, nickel plating and gold plating can further enhance the corrosion resistance of metal conductors and improve the overall durability and reliability of data lines.

[0051] A method for preparing a data line resistant to electromagnetic wave interference comprises the following steps:

[0052] S1: Prepare the conductor, select flat copper wire as the metal conductor material, nickel-plate the copper wire as a whole and then plate gold at both ends;

[0053] S2: preparing an absorbing layer, mixing an unsaturated polyester resin, a curing agent, a flame retardant, an additive, a stabilizer and an absorbing powder in a ratio of 55:20:10:3:1:11 to form an absorbing material, and then uniformly coating the absorbing material on the surface of the metal conductor by extrusion, coating or spraying to form an absorbing layer;

[0054] S3: Wrapping the insulation layer, through the hot pressing process, the high-performance polyimide film material is evenly coated on the outside of the metal conductor to form an insulation layer;

[0055] S4: preparing an anti-electromagnetic interference layer, mixing nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive in a ratio of 60:36:4 to form an anti-electromagnetic interference composite material, and then uniformly coating the anti-electromagnetic interference composite material on the outside of the insulating layer by extrusion, coating or spraying to form an anti-electromagnetic interference layer to obtain a wire core;

[0056] S5: Wrapping with hot melt adhesive film, arranging a certain number of wire cores neatly at predetermined intervals, and evenly coating them with hot melt adhesive film, and closely combining the hot melt adhesive film and the wire cores through a hot pressing process to form a data cable;

[0057] S6: Install a reinforcement plate at both ends of the data cable, and fix the reinforcement plate and the data cable together through a hot pressing process.

[0058] Working principle: When in use, flat copper wire is selected as the metal conductor material, the copper wire is nickel-plated as a whole and then gold-plated at both ends, and then unsaturated polyester resin, curing agent, flame retardant, additive, stabilizer and absorbing powder are mixed in proportion to form an absorbing material, and then the absorbing material is evenly coated on the surface of the metal conductor by extrusion, coating or spraying to form an absorbing layer, and then the high-performance polyimide film material is evenly coated on the outside of the metal conductor by hot pressing to form an insulating layer, and then nano-scale metal oxide particles, high molecular polymer matrix and conductive additives are mixed in proportion to form an anti-electromagnetic interference composite material, and then the anti-electromagnetic interference composite material is evenly coated on the outside of the insulating layer by extrusion, coating or spraying to form an anti-electromagnetic interference layer to obtain a wire core, and then a certain number of wire cores are neatly arranged at predetermined intervals and evenly coated with hot melt adhesive film, and the hot melt adhesive film is tightly combined with the wire core by hot pressing to form a data cable, and finally reinforcing plates are installed at both ends of the data cable, and the reinforcing plates and the data cable are fixed together by hot pressing.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A data line resistant to electromagnetic interference, comprising a data line body, characterized in that: The data cable body comprises a wire core (1), a hot melt adhesive film (2) and a reinforcing plate (3); the wire core (1) is composed of a metal conductor (7), an absorbing layer (8), an insulating layer (9) and an anti-electromagnetic interference layer (10); the absorbing layer (8) is arranged on the outside of the metal conductor (7), the insulating layer (9) is arranged on the outside of the absorbing layer (8), and the anti-electromagnetic interference layer (10) is arranged on the outside of the insulating layer (9).

2. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The wave absorbing layer (8) is made of unsaturated polyester resin, curing agent, flame retardant, additive, stabilizer and wave absorbing powder material.

3. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The insulating layer (9) is made of high-performance polyimide film material.

4. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The anti-electromagnetic wave interference layer (10) is made of a nano-composite material, and the nano-composite material is made of nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive.

5. The data line resistant to electromagnetic interference according to claim 4, characterized in that: The nano-scale metal oxide particles include ferrite and titanate.

6. The data line resistant to electromagnetic interference according to claim 5, characterized in that: The high molecular polymer matrix is ​​a thermoplastic or thermosetting polymer.

7. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The hot melt adhesive film (2) covers the outside of the wire core (1), and the reinforcing plates (3) are arranged at two ends below the hot melt adhesive film (2).

8. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The hot melt adhesive film (2) is composed of a PET film (4), ink (5) and hot melt flame retardant polyester (6), and the ink (5) and the hot melt flame retardant polyester (6) are coated on the PET film (4).

9. The data line resistant to electromagnetic interference according to claim 1, characterized in that: The metal conductor (7) is a flat copper wire substrate conductor that has been nickel-plated and gold-plated to enhance its electrical conductivity and corrosion resistance.

10. A method for preparing a data line resistant to electromagnetic wave interference, based on the data line resistant to electromagnetic wave interference according to claims 1-9, characterized in that: The steps include: S1: Prepare the conductor, select flat copper wire as the metal conductor material, nickel-plate the copper wire as a whole and then plate gold at both ends; S2: preparing an absorbing layer, mixing an unsaturated polyester resin, a curing agent, a flame retardant, an additive, a stabilizer and an absorbing powder in a ratio of 55:20:10:3:1:11 to form an absorbing material, and then uniformly coating the absorbing material on the surface of the metal conductor by extrusion, coating or spraying to form an absorbing layer; S3: Wrapping the insulation layer, through the hot pressing process, the high-performance polyimide film material is evenly coated on the outside of the metal conductor to form an insulation layer; S4: preparing an anti-electromagnetic interference layer, mixing nano-scale metal oxide particles, a high molecular polymer matrix and a conductive additive in a ratio of 60:36:4 to form an anti-electromagnetic interference composite material, and then uniformly coating the anti-electromagnetic interference composite material on the outside of the insulating layer by extrusion, coating or spraying to form an anti-electromagnetic interference layer to obtain a wire core; S5: Wrapping with hot melt adhesive film, arranging a certain number of wire cores neatly at predetermined intervals, and evenly coating them with hot melt adhesive film, and closely combining the hot melt adhesive film and the wire cores through a hot pressing process to form a data cable; S6: Install a reinforcement plate at both ends of the data cable, and fix the reinforcement plate and the data cable together through a hot pressing process.

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