CN111564241A - High-speed communication cable - Google Patents

High-speed communication cable Download PDF

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Publication number
CN111564241A
CN111564241A CN202010437311.XA CN202010437311A CN111564241A CN 111564241 A CN111564241 A CN 111564241A CN 202010437311 A CN202010437311 A CN 202010437311A CN 111564241 A CN111564241 A CN 111564241A
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communication cable
speed communication
insulating material
shielding film
high speed
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CN111564241B (en
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刘雅樑
方新春
杨吉
杨凤泉
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Huaxun Industrial Suzhou Co ltd
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Huaxun Industrial Suzhou Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/002—Pair constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0098—Shielding materials for shielding electrical cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation

Abstract

The invention relates to a high-speed communication cable, and belongs to the technical field of high-speed data transmission. The high-speed communication cable comprises a pair of parallel conductors, wherein the conductors are arranged side by side, the periphery of each conductor is coated or coated with an insulating material, and the periphery of the insulating material is sequentially coated with a composite shielding film and an outer shield; the composite shielding film comprises a plastic substrate and aluminum layers which are sputtered and deposited on the upper surface and the lower surface of the plastic substrate. The high-speed communication cable provided by the invention not only has low time delay difference, but also has high cut-off frequency and excellent shielding attenuation performance.

Description

High-speed communication cable
Technical Field
The present invention relates to the field of high-speed data transmission, and more particularly, to a high-speed communication cable.
Background
A communication cable is a cable for transmitting telephone, telegraph, facsimile documents, television and radio programs, data and other electrical signals, has the advantages of large communication capacity, high transmission stability, good confidentiality, little influence from natural conditions and external interference, and the like, and provides a reliable data transmission medium. Communication cables are known for use in high frequency carrier and digital communications and signal transmission for near audio communications and for long distances.
With the development of 5G technology, cloud technology, and the internet of things, a high-speed communication cable capable of transmitting data at a faster speed is required. It is known that optical fiber communication cables can provide data transmission with low attenuation and low error rate, and can provide optimal data rate and stability for long-distance and high data rate transmission, but the optical fiber communication cables are active systems and need to be equipped with transceivers, resulting in high cost, and therefore passive high-speed communication cables are generally adopted as an alternative in the prior art in short-distance applications. The high-speed communication cable end adopts a connector which is the same as an optical module interface, but a connector module of a passive high-speed communication cable does not have an expensive optical laser and other electronic elements, so that the cost and the power consumption are greatly saved in short-distance application, and the high-speed communication cable end serving as a substitute low-cost high-speed data communication solution is widely applied to scenes of interconnection of data centers such as a high-speed memory, a core router, a high-speed Ethernet and the like.
In the prior art, two separate insulated conductors (e.g. solid silver-plated copper) are provided in a parallel relationship, and a shielding structure is provided outside the conductors, and in order to improve the shielding effect, a composite shielding structure of aluminum foil + aluminum wire weaving is generally adopted in the prior art, but this also increases the attenuation of the electrical signal, resulting in a low cut-off frequency (pick out).
Disclosure of Invention
To solve the above technical problems in the prior art, an object of the present invention is to provide a high-speed communication cable.
The high-speed communication cable comprises a pair of parallel conductors, wherein the conductors are arranged side by side, the periphery of each conductor is coated or coated with an insulating material, and the periphery of the insulating material is sequentially coated with a composite shielding film and an outer shield; the method is characterized in that: the composite shielding film comprises a plastic substrate and aluminum layers which are sputtered and deposited on the upper surface and the lower surface of the plastic substrate.
Wherein the thickness of the single-side aluminum layer is 3-30 μm, preferably 3-10 μm.
Wherein a NiAl alloy layer is sputter deposited between the plastic substrate 31 and the aluminum layer 32.
Wherein the thickness of the NiAl alloy layer is 0.1-2.0 μm, preferably 0.2-1.0 μm.
Wherein, in the NiAl alloy layer, the content of Ni is 30 wt% -50 wt%.
Wherein a tin layer with the thickness of 0.1-2.0 mu m is sputtered and deposited on the outer surface of the aluminum layer, and the thickness of the tin layer is preferably 0.2-1.0 mu m.
Wherein two parallel drainage lines are arranged between the composite shielding film and the outer protective layer.
The conductor is a tinned soft round copper wire, a silvered soft round copper wire or a nickelled soft round copper wire, and preferably is a silvered soft round copper wire.
The insulating material is polyvinyl chloride, polyethylene, cross-linked polyethylene, foamed polyethylene, polypropylene, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride or polyimide.
The outer protective layer is made of polyvinyl chloride, cross-linked polyvinyl chloride, flame-retardant polyvinyl chloride, low-density polyethylene, high-density polyethylene, medium-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-methacrylate copolymer, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or polyester, and preferably hot-melt polyester.
Compared with the prior art, the high-speed communication cable has the following beneficial effects:
the high-speed communication cable provided by the invention not only has low time delay difference, but also has high cut-off frequency and excellent shielding attenuation performance.
Drawings
Fig. 1 is a schematic 3D structure diagram of a high-speed communication cable according to the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of a high-speed communication cable according to the present invention.
FIG. 3 is a schematic view of a vacuum coating system for preparing a composite shielding film.
Fig. 4 is a schematic cross-sectional view of a composite shielding film used in example 1.
Fig. 5 is a schematic cross-sectional view of a composite shielding film used in example 2.
Fig. 6 is a schematic cross-sectional view of a composite shielding film used in example 3.
Fig. 7 is a schematic cross-sectional view of a composite barrier film used in example 3.
Fig. 8 is a graph of shielding attenuation versus frequency using a composite shielding film.
Figure 9 is a graph of shielding attenuation versus frequency using rolled aluminum foil.
Detailed Description
The present invention is further described with reference to specific embodiments thereof to assist those skilled in the art in providing a more complete, accurate and thorough understanding of the present invention.
As shown in fig. 1-2, the high-speed communication cable of the present invention includes a pair of parallel conductors 10 arranged side by side, each conductor 10 is coated or coated with an insulating material 20 on the periphery thereof, the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50 on the periphery thereof, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive.
In the present invention, the conductor 10 may be selected from a tin-plated soft round copper wire, a silver-plated soft round copper wire, a nickel-plated soft round copper wire, or the like. The tin is extremely stable in the atmospheric environment, and the corrosion resistance of the copper can be improved by tinning the copper wire; silver has excellent electrical and thermal conductivity, oxidation resistance, and good ductility; the nickel-plated soft copper wire can improve the high-temperature resistance. In the present invention, the conductor 10 is preferably a silver-plated soft round copper wire. The drain wire 40 may be a tinned soft round copper wire.
In the present invention, the insulating material 20 may be selected from polyvinyl chloride (PVC), Polyethylene (PE), cross-linked polyethylene (XLPE), foamed Polyethylene (PEF), polypropylene (PP), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), polyimide, or the like. The insulating material 20 may be selected according to application scenarios or requirements, for example, PEF may be selected to achieve small dielectric loss, and crosslinking with radiation may improve heat resistance and mechanical strength. For high frequency communication cables, PP may be selected, but inhibitors and flame retardants, etc. need to be added. In order to improve the bending resistance and the heat resistance, ETFE can be selected, and in a special application scene, PI materials with high temperature resistance and radiation resistance can be selected, but the price is high.
In the present invention, the outer sheath 50 may be formed of a synthetic resin material, such as polyvinyl chloride, cross-linked polyvinyl chloride, flame retardant polyvinyl chloride, low density polyethylene, high density polyethylene, medium density polyethylene, ethylene vinyl acetate copolymer (EVA), ethylene-methyl acrylate copolymer (EMA), polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer (ETFE), or polyester (e.g., polyethylene terephthalate PET, polybutylene terephthalate PBT, etc.). In the present invention, a hot-melt polyester material is preferably used.
In the prior art, in order to meet the requirement of the electromagnetic shielding performance of the cable, an aluminum foil is generally adopted, or further, in order to meet the requirement of the electromagnetic shielding performance under a high-frequency condition, a composite shielding structure woven by the aluminum foil and an aluminum wire is generally adopted, so that the material cost is obviously increased, and meanwhile, the weight of the cable is also obviously increased. In addition, the aluminum foil used in the prior art is a rolled aluminum foil, but the rolled aluminum foil is used as a shielding material, and the shielding attenuation effect is not ideal.
For this purpose, as shown in fig. 4-7, the composite shielding film 30 used in the present invention includes a plastic substrate 31 and aluminum layers 32 vacuum-sputter-deposited on the upper and lower surfaces of the plastic substrate 31, the thickness of the single-sided aluminum layer 32 may be in the range of 3 to 30 μm, preferably in the range of 3 to 10 μm, depending on the shielding performance requirement, in order to ensure the durable shielding performance requirement of the composite shielding film 30, a tin layer 35 may be further vacuum-deposited on the outer surface of the aluminum layer 32, the thickness of the tin layer 35 may be in the range of 0.1 to 2.0 μm, preferably in the range of 0.2 to 1.0 μm, and particularly, the NiAl alloy layer 33 preferably formed between the plastic substrate 31 and the aluminum layer 32 may maintain the excellent shielding attenuation effect. The thickness of the NiAl alloy layer is 0.1-2.0 μm, preferably 0.2-1.0 μm. In the NiAl alloy layer, the Ni content is 30 wt% to 50 wt%, and when the Ni content is less than 30 wt%, the shielding attenuation maintaining effect is significantly reduced, whereas when the Ni content is more than 50 wt%, the shielding attenuation effect of the composite shielding film 30 is not favorable. In the present invention, the plastic substrate 31 may be selected from polyester, polyethylene, polyvinyl chloride, or the like.
The composite shielding film 30 of the present invention can be mass-produced using a roll-to-roll vacuum coating system as shown in fig. 3. The sputtering device generally comprises an unwinding chamber 1 with an unwinding mechanism, a winding chamber 2 with a winding mechanism, and at least one vacuum sputtering chamber 3, wherein a deposition roller 4 is arranged in the sputtering chamber 3, one or more cathodes 6 can be arranged on the periphery of the deposition roller 4, the cathode 6 can be a mounted target to be sputtered or an ion source for pretreatment, and the cathodes (targets) can be different according to different processes, and different cathodes 6 are spaced apart to maintain independent working atmospheres. The substrate enters the vacuum sputtering chamber 3 through the vacuum maintaining valve 7 after being released from the unwinding roller through the transmission mechanism to be coated according to the process, then enters the winding chamber 2 through the vacuum maintaining valve 7 to be wound, and then the same film layer can be coated on the other surface of the substrate by repeating the coating process. Of course, if two deposition rollers 4 are provided in the vacuum deposition chamber, it is possible to deposit the film layer on both surfaces of the plastic substrate at the same time. The deposition of a metal film, such as aluminum, tin or alloys thereof, on the surface of a plastic substrate is well known in the art and will not be described herein.
Fig. 8 and 9 show the results of the shielding attenuation of high-speed communication cables using the composite shielding film 30 of the present invention (5 mm for each of the upper and lower surfaces of the plastic substrate) and a conventional rolled aluminum foil (10 μm in thickness) of the prior art as the cable length of 1.0m tested at different frequencies. It can be seen that the composite shielding film 30 of the present invention not only shows a higher shielding attenuation effect, but also is significantly different in characteristics from the rolled aluminum foil due to the sputter-deposited layer structure of the composite shielding film 30 of the present invention. The cut-off frequency of the high-speed communication cable is greater than 16GHz, and the time delay difference is less than or equal to 10 ps/m.
Example 1
The present embodiment provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type of solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. In the present embodiment, referring to fig. 4, the composite barrier film 30 includes a polyethylene base 31 having a thickness of 50 μm and aluminum layers 32 vacuum sputter deposited on the upper and lower surfaces of the polyethylene base 31 and each having a thickness of about 5 μm.
Example 2
The present embodiment provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type of solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. In the present embodiment, referring to fig. 6, the composite barrier film 30 includes a polyethylene base 31 having a thickness of 50 μm, aluminum layers 32 vacuum sputter deposited on upper and lower surfaces of the polyethylene base 31 and having a thickness of about 5 μm each, and a tin layer 35 vacuum sputter deposited on the aluminum layers 32 and having a thickness of about 0.2 μm.
Example 3
The present embodiment provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type of solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. In the present embodiment, referring to fig. 7, the composite barrier film 30 comprises a polyethylene base material 31 having a thickness of 50 μm, NiAl alloy layers 33 vacuum sputter deposited on the upper and lower surfaces of the polyethylene base material 31 and having a thickness of about 0.5 μm each (Ni content is about 30 wt% of the alloy layer), an aluminum layer 32 vacuum sputter deposited on the NiAl alloy layers 33 and having a thickness of about 5 μm, and a tin layer 35 vacuum sputter deposited on the aluminum layer 32 and having a thickness of about 0.2 μm, in this order.
Example 4
The present embodiment provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type of solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. In the present embodiment, as shown in fig. 7, the composite barrier film 30 comprises a polyethylene base material 31 having a thickness of 50 μm, a NiAl alloy layer 33 vacuum sputter deposited on the upper and lower surfaces of the polyethylene base material 31 and having a thickness of about 0.5 μm each (Ni content is about 50 wt% of the alloy layer), an aluminum layer 32 vacuum sputter deposited on the NiAl alloy layer 33 and having a thickness of about 5 μm, and a tin layer 35 vacuum sputter deposited on the aluminum layer 32 and having a thickness of about 0.2 μm, in this order.
Example 5
The present embodiment provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type of solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. In the present embodiment, referring to fig. 5, the composite barrier film 30 comprises, in order, a 50 μm thick polyethylene base 31, a NiAl alloy layer 33 vacuum sputter deposited on the upper and lower surfaces of the polyethylene base 31 and having a thickness of about 0.5 μm each (Ni content is about 30 wt% of the alloy layer), and an aluminum layer 32 vacuum sputter deposited on the NiAl alloy layer 33 and having a thickness of about 5 μm.
Comparative example 1
The comparative example provides a high-speed communication cable, which comprises a pair of conductors 10 arranged in parallel side by side, wherein the type of the conductor 10 is solid silver-plated copper, and the outer diameter of the conductor is 0.285 +/-0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a shielding aluminum foil 30 and an outer sheath 50, and two parallel drainage wires 40 are arranged between the shielding aluminum foil 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the shielding aluminum foil 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. The shielding aluminum foil was a rolled aluminum foil and had a thickness of about 10 μm.
Comparative example 2
The comparative example provides a high-speed communication cable, which comprises a pair of conductors 10 arranged in parallel side by side, wherein the type of the conductor 10 is solid silver-plated copper, and the outer diameter of the conductor is 0.285 +/-0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a shielding aluminum foil 30 and an outer sheath 50, and two parallel drainage wires 40 are arranged between the shielding aluminum foil 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the shielding aluminum foil 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. The shielding aluminum foil was a rolled aluminum foil and had a thickness of about 12 μm.
Comparative example 3
The comparative example provides a high-speed communication cable, which comprises a pair of conductors 10 arranged in parallel side by side, wherein the type of the conductor 10 is solid silver-plated copper, and the outer diameter of the conductor is 0.285 +/-0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a shielding aluminum foil 30 and an outer sheath 50, and two parallel drainage wires 40 are arranged between the shielding aluminum foil 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the shielding aluminum foil 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. The shielding aluminum foil is a rolled aluminum foil with tin plated on the surface, the thickness of the rolled aluminum foil is about 10 μm, and the thickness of the tin plated layer is about 0.2 μm.
Comparative example 4
The present comparative example provides a high-speed communication cable having the structure shown in fig. 1-2, comprising a pair of conductors 10 arranged in parallel side by side, the conductors 10 being of the type solid silver-plated copper and having an outer diameter of 0.285 ± 0.02 mm; the periphery of each conductor 10 is coated with an insulating material 20, the insulating material 20 is polyethylene, and the outer diameter of the insulating material is 0.80 +/-0.02 mm; the periphery of the insulating material 20 is sequentially coated with a composite shielding film 30 and an outer sheath 50, and two parallel drain wires (drain wires) 40 are arranged between the composite shielding film 30 and the outer sheath 50. The composite shielding film 30 wraps the insulating material 20 along the length direction of the insulating material 20, and end portions of the composite shielding film 30 are overlapped and bonded by a conductive adhesive. The outer sheath is made of hot-melt polyester tapes, the height of the outer sheath is 0.99 +/-0.3 mm, and the width of the outer sheath is 1.79 +/-0.3 mm; the material of the drainage wire is solid tin-plated copper. The composite barrier film 30 sequentially includes a polyethylene base 31 having a thickness of 50 μm, metallic nickel layers 33 vacuum sputter-deposited on upper and lower surfaces of the polyethylene base 31 and having a thickness of about 0.5 μm each, an aluminum layer 32 vacuum sputter-deposited on the metallic nickel layers 33 and having a thickness of about 5 μm, and a tin layer 35 vacuum sputter-deposited on the aluminum layer 32 and having a thickness of about 0.2 μm.
The high-speed communication cables (length 1.0m) prepared in the examples and comparative examples were tested for their shielding attenuation results at different frequencies, and the results are shown in table 1. The high-speed communication cables prepared in the examples and comparative examples were aged for 200 hours at 50 ℃ and 90% relative humidity, and then the shielding attenuation results (lower limit) at different frequencies were measured, and the results are shown in table 2.
TABLE 1
Figure BDA0002502769500000081
TABLE 2
Figure BDA0002502769500000091
For those skilled in the art, the specific embodiments are only exemplary descriptions of the present invention, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and various insubstantial modifications made by the technical solution of the present invention are within the protection scope of the present invention.

Claims (10)

1. A high-speed communication cable comprises a pair of conductors arranged in parallel side by side, wherein the periphery of each conductor is coated or coated with an insulating material, and the periphery of the insulating material is sequentially coated with a composite shielding film and an outer shield; the method is characterized in that: the composite shielding film comprises a plastic substrate and aluminum layers which are sputtered and deposited on the upper surface and the lower surface of the plastic substrate.
2. A high speed communication cable according to claim 1, wherein: the thickness of the single-side aluminum layer is 3-30 mu m.
3. A high speed communication cable according to claim 1, wherein: and a NiAl alloy layer is sputtered and deposited between the plastic substrate and the aluminum layer.
4. A high speed telecommunications cable according to claim 3, wherein: the thickness of the NiAl alloy layer is 0.1-2.0 mu m.
5. A high speed telecommunications cable according to claim 3, wherein: in the NiAl alloy layer, the Ni content is 30 wt% -50 wt%.
6. A high speed communication cable according to claim 1, wherein: and a tin layer with the thickness of 0.1-2.0 mu m is sputtered and deposited on the outer surface of the aluminum layer.
7. A high speed communication cable according to claim 1, wherein: two parallel drainage lines are arranged between the composite shielding film and the outer protective layer.
8. A high speed communication cable according to claim 1, wherein: the conductor is a tinned soft round copper wire, a silvered soft round copper wire or a nickelled soft round copper wire.
9. A high speed communication cable according to claim 1, wherein: the insulating material is polyvinyl chloride, polyethylene, cross-linked polyethylene, foamed polyethylene, polypropylene, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride or polyimide.
10. A high speed communication cable according to claim 1, wherein: the outer protective layer is made of polyvinyl chloride, cross-linked polyvinyl chloride, flame-retardant polyvinyl chloride, low-density polyethylene, high-density polyethylene, medium-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-methacrylate copolymer, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or polyester, and preferably hot-melt polyester.
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CN103413614A (en) * 2013-08-21 2013-11-27 浙江万马集团特种电子电缆有限公司 Outer layer hot-melt aluminum foil for three-screened coaxial cable
CN103871591A (en) * 2014-02-23 2014-06-18 安徽华海特种电缆集团有限公司 Flat cable for mobile frequency converter
CN104350117A (en) * 2012-06-04 2015-02-11 阿莫绿色技术有限公司 Conductive adhesive tape and method for manufacturing same
CN105578851A (en) * 2014-10-15 2016-05-11 昆山雅森电子材料科技有限公司 Thin-type high-transmission electromagnetic-absorbing screened film and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
CN202003728U (en) * 2011-04-23 2011-10-05 安徽华津电缆集团有限公司 Intrinsic safe computer cable for oil platform
CN104350117A (en) * 2012-06-04 2015-02-11 阿莫绿色技术有限公司 Conductive adhesive tape and method for manufacturing same
CN202736551U (en) * 2012-07-30 2013-02-13 安徽复兴电缆集团有限公司 Computer cable for offshore oil platform
CN103413614A (en) * 2013-08-21 2013-11-27 浙江万马集团特种电子电缆有限公司 Outer layer hot-melt aluminum foil for three-screened coaxial cable
CN103871591A (en) * 2014-02-23 2014-06-18 安徽华海特种电缆集团有限公司 Flat cable for mobile frequency converter
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