A communication shielding cable

Abstract

The present invention discloses a communication shielding cable, which includes a PTFE core wire with several conducting cores inside. A shielding film tape is seamlessly wound around the outer periphery of the PTFE core wire, and a PVC protective sleeve is arranged on the outer periphery of the winding layer of the shielding film tape. Among them, the shielding film tape is a composite shielding film tape formed by thermocompression of copper foil and PI film, and there is a hot melt connection between the PI film and the PTFE core wire. The shielding effect of the present invention is remarkable, meeting the requirements of 5G communication shielding cables. By replacing the tinned copper metal braided sleeve with a shielding film tape, the cable cost is greatly reduced. The outer peripheral wrapping section formed by continuous overlapping splicing is used to form the winding layer, reducing the production process cost. At the same time, the insulating layer and the conductive layer of the winding layer are continuously matched, improving the transmission efficiency of the interference signal source and ensuring the insulation blocking property. With a protective layer design, it can increase the firm stability of the winding layer, meet the corrosion-resistant isolation requirement, and extend the service life of the communication shielding cable.

Description

Technical Field

[0001] The present invention relates to a communication shielding cable, belonging to the technical field of shielding cables. Background Art

[0002] The advent of 5G networks has had a significant impact on key components, especially connectors and cables used in wireless and wired infrastructures. Recently, the United States and the United Kingdom have announced the acceleration of 5G network development, which has injected vitality into the entire network industry. Nowadays, Western economies are trying to compete with the 5G technology centrally launched by China.

[0003] However, achieving this leap on a large scale will depend on the adoption of new cable technologies. Around the world, copper-based mobile backhaul architectures are being upgraded to packet transmission architectures via optical fibers. Optical cables can transmit higher bandwidths and are therefore an essential configuration for the processing speed of future 5G network products. Small cell base stations, new devices and products that match 5G networks must all be able to handle higher speeds and densities, while reducing latency, consuming less energy, generating less heat, etc. Among them, the shielding requirements for cables are very demanding.

[0004] Traditionally, communication shielding cables use PTFE core wires and PVC protective sleeves. A metal braided sleeve is designed between the PTFE core wire and the PVC protective sleeve. The metal braided sleeve is treated with tinned copper. This shielding cable has a high cost, poor shielding performance, and a large diameter, which is not conducive to cable laying. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art. Aiming at the problems of high production cost and poor shielding performance of traditional shielding cables, a communication shielding cable is proposed.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A communication shielding cable includes a PTFE core wire with several conducting cores inside. A shielding film tape is wound seamlessly around the outer periphery of the PTFE core wire. A PVC protective sleeve is provided on the outer periphery of the winding layer of the shielding film tape.

[0008] Among them, the shielding film tape is a composite shielding film tape formed by thermocompression lamination of copper foil and PI film. The PI film and the PTFE core wire are fixedly connected by hot melting.

[0009] Preferably, the shielding film tape is composed of several sequentially spliced outer peripheral wrapping segments. The copper foil and the PI film of any outer peripheral wrapping segment are misaligned. The PI films of adjacent outer peripheral wrapping segments overlap, and the copper foils overlap.

[0010] The two free ends of any outer peripheral wrapping segment overlap.

[0011] Preferably, a protective layer is provided between the outer periphery of the winding layer and the PVC protective sleeve.

[0012] Preferably, the protective layer is an acrylic protective agent sprayed on the outer periphery of the winding layer.

[0013] Preferably, the thickness of the copper foil is 7-20 μm, and the thickness of the PI film is 8 μm-25 μm.

[0014] The beneficial effects of the present invention are mainly reflected in:

[0015] 1. The shielding effect is remarkable, meeting the requirements of 5G communication shielding cables. By replacing the tinned copper metal braided sleeve with a shielding film tape, the cable cost is greatly reduced.

[0016] 2. The outer peripheral wrapping section formed by continuous overlapping splicing is used to form the winding layer, reducing the production process cost. At the same time, the insulating layer and the conductive layer of the winding layer are continuously coordinated, improving the transmission efficiency of the interference signal source and ensuring the insulation blocking property.

[0017] 3. With the protective layer design, it can increase the firm stability of the winding layer, and at the same time meet the requirements of corrosion resistance isolation, extending the service life of the communication shielding cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic cross-sectional structure diagram of a communication shielding cable of the present invention.

[0019] Figure 2 is a schematic cross-sectional structure diagram of a communication shielding cable of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention provides a communication shielding cable. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings to make it easier to understand and master.

[0021] A communication shielding cable, as Figure 1 and Figure 2 shown, includes a PTFE core wire 2 with several guide cores 1 inside. The outer periphery of the PTFE core wire 2 is seamlessly wound with a shielding film tape 3, and a PVC protective sleeve 4 is provided on the outer periphery of the winding layer of the shielding film tape 3.

[0022] Among them, the shielding film tape 3 is a composite shielding film tape formed by thermocompression of a copper foil 5 and a PI film 6, and the PI film 6 is thermally fixed to the PTFE core wire 2.

[0023] Specifically, the use of a composite shielding film tape instead of a traditional tinned copper metal braided sleeve effectively reduces the cost of the shielding layer and controls the diameter of the communication cable, and the shielding effect is better.

[0024] In addition, using a PI film as the copper foil baseband can increase the flexibility and strength of the composite shielding film tape, and it is not easy for the copper foil 5 to be damaged, ensuring the stable quality of the communication cable. It should be noted that when the copper foil and the PI film are hot-pressed and formed, there is an auxiliary adhesive between them, which belongs to the prior art and will not be elaborated here.

[0025] In a specific embodiment, the shielding film tape 3 is composed of a plurality of sequentially spliced outer peripheral wrapping segments 7. The copper foil 5 and the PI film 6 of any outer peripheral wrapping segment 7 are misaligned, the PI films 6 of adjacent outer peripheral wrapping segments overlap, the copper foils 5 overlap, and the two free ends of any outer peripheral wrapping segment 7 overlap.

[0026] Specifically, as is well known, the shielding film tape 3 is used for grounding operations, that is, external interference signals will be grounded by the shielding film tape 3 to play an anti-interference role. Traditionally, the shielding film tape 3 is processed by means such as spiral winding. On the one hand, the processing cost of spiral winding is relatively high. On the other hand, there is a small overlapping part between the shielding film tapes 3 after spiral winding. This overlapping part is formed by the overlapping of the insulating film and the conductive film, and there is a certain signal passing gap, so the shielding effect will be greatly affected. On the other hand, the conductive film of spiral winding has a long stroke, a high resistance, and a low transmission efficiency for interference signals, increasing the interference risk.

[0027] In this case, the production process of using a plurality of outer peripheral wrapping segments 7, that is, step-by-step wrapping of the outer peripheral wrapping segments 7, and there is a certain free end overlapping area in each outer peripheral wrapping segment 7, effectively reducing signal interference. The segmented wrapping process effectively reduces the production cost. In addition, the outer peripheral wrapping segments 7 are connected in a misaligned docking form, that is, the PI films 6 overlap and the copper foils 5 overlap, so that the insulating layers are connected as a whole and the conductive layers are connected as a whole. In this way, the insulation requirements can be met. At the same time, the copper foils 5 of several segments are conductively connected, which is easy to conduct away and transmit interference signals, and the shielding effect is remarkable.

[0028] In a specific embodiment, a protective layer 8 is provided between the outer periphery of the winding layer and the PVC protective sleeve 4. The protective layer 8 is an acrylic protective agent sprayed on the outer periphery of the winding layer.

[0029] Specific implementation process and principle description:

[0030] First, the PTFE material is wrapped on the guide core 1 to form the PTFE core wire 2, and this forming process belongs to the prior art.

[0031] Then, the shielding film tape 3 is heat-wrapped through a wrapping device. By adopting a step-by-step segmented wrapping method, the PI films 6 and the copper foils 5 of each outer peripheral wrapping segment 7 overlap to form a winding layer. The PI film and the PTFE are thermally compounded, and a polymer adhesive can be added.

[0032] The acrylic protective agent is sprayed on the winding layer and baked for curing. Finally, the PVC protective sleeve 4 is formed by an extruder.

[0033] On the one hand, the acrylic protective agent can increase the reinforcement effect of the outer peripheral wrapping section 7 and their mutual cooperation. On the other hand, it can protect the winding layer, playing a role in corrosion resistance and air isolation, preventing external water vapor and the like from invading and damaging the winding layer after a gap is generated between the PVC protective sleeve 4 and the inner core, and extending the service life of the communication shielding cable.

[0034] In a specific embodiment, the copper foil is rolled copper with a thickness of 7 - 20 μm, and the thickness of the PI film is 8 μm - 25 μm. The shielding film tape 3 within this size range meets the shielding requirements of the 5G communication shielding cable.

[0035] Through the above description, it can be found that the communication shielding cable of the present invention has a remarkable shielding effect, meets the requirements of the 5G communication shielding cable. By using the shielding film tape instead of the tinned copper metal braided sleeve, the cable cost is greatly reduced. The outer peripheral wrapping sections formed by continuous overlapping splicing form a winding layer, reducing the production process cost. At the same time, the insulating layer and the conductive layer of the winding layer are continuously coordinated, improving the transmission efficiency of the interference signal source and ensuring the insulation blocking property. It has a protective layer design, which can increase the firm stability of the winding layer, and at the same time meets the requirements of corrosion resistance and isolation, extending the service life of the communication shielding cable.

[0036] The technical solution of the present invention has been fully described above. It should be noted that the specific implementation manner of the present invention is not limited by the above description. All technical solutions formed by those of ordinary skill in the art through equivalent transformation or equivalent substitution in terms of structure, method or function and the like based on the spirit of the present invention fall within the protection scope of the present invention.

Claims

1. A communication shielding cable, characterized in that: it includes a PTFE core wire with several conducting cores inside, a shielding film tape is seamlessly wound around the outer periphery of the PTFE core wire, and a PVC protective sleeve is arranged on the outer periphery of the winding layer of the shielding film tape, wherein, the shielding film tape is a composite shielding film tape formed by thermocompression lamination of copper foil and PI film, and the PI film is fixedly connected by hot melting with the PTFE core wire; the shielding film tape is composed of several sequentially spliced outer peripheral wrapping segments, the copper foil and the PI film of any of the outer peripheral wrapping segments are misaligned, the PI films of adjacent outer peripheral wrapping segments overlap, and the copper foils overlap, the two free ends of any of the outer peripheral wrapping segments overlap; the thickness of the copper foil is 7-20 μm, and the thickness of the PI film is 8 μm-25 μm.

2. The communication shielding cable according to claim 1, characterized in that: a protective layer is arranged between the outer periphery of the winding layer and the PVC protective sleeve.

3. The communication shielding cable according to claim 2, characterized in that: the protective layer is an acrylic protective agent sprayed on the outer periphery of the winding layer.

Images