Composite shielding tape and cable

Abstract

The utility model discloses a composite shielding tape, which comprises an aluminum tape layer, a copper wire layer and a polyester tape layer which are sequentially and tightly arranged, the copper wire layer comprises a plurality of copper wires which are flatly arranged along the winding direction of the composite shielding tape, and the adjacent copper wires are mutually contacted and are not crossed. According to the utility model, the structure of a traditional aluminum-plastic composite shielding tape is changed, the drainage wire is optimized into a plurality of parallel single fine copper wires from a traditional large-diameter single copper wire or multi-strand copper wire bundle, and the single fine copper wires are embedded between the aluminum tape layer and the polyester tape layer to form an integral structure, so that an excellent anti-interference effect can be maintained, and the service life of the shielding tape is prolonged. Meanwhile, the aluminum tape layer and the polyester tape layer are copper wires which isolate air, so that the copper wires are not easy to oxidize, the drainage effect of the copper wires is guaranteed, the copper wires are not in direct contact with the insulating layer and cannot damage insulation when the copper wires are applied to the cable, and the copper wires are laid between the aluminum tape layer and the polyester tape layer in parallel and are in mutual contact but not crossed. And the outer diameter of the cable is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a composite shielding tape and a cable. Background Art

[0002] As an outer protective shell of a cable core, a composite shielding tape has the functions of protecting the core from moisture, corrosion and anti-interference. Since cables are mostly installed in outdoor environments, they are vulnerable to external harsh environments and are subject to communication interference. Most of the existing composite shielding tapes are aluminum-plastic composite shielding tapes. When used for cable shielding, a drainage wire that is continuously in contact with the aluminum surface in the aluminum-plastic composite tape is required to timely drain the current accumulated in the electric field to avoid damage to the cable and equipment. For example, a CAN-applied halogen-free low-smoke polypropylene hydrocarbon bus cable disclosed in the authorized announcement number CN202363151U. The drainage wire of this cable is generally made of a single thick copper wire or a stranded copper wire with a large diameter, which will have the following effects on the cable:

[0003] 1. Its outer diameter is large, affecting the roundness of the cable;

[0004] 2. Stranding with the wire core into a cable will squeeze the insulating layer, causing insulation damage and potential safety hazards.

[0005] Therefore, it is necessary to improve the structure of the existing aluminum-plastic composite shielding tape to solve the above technical problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a composite shielding tape and a cable for the deficiencies of the prior art, which can effectively reduce the outer diameter of the cable, improve the roundness of the cable, and at the same time will not damage the insulation and improve the safety of cable use.

[0007] The technical solution to achieve the purpose of the utility model is:

[0008] A composite shielding tape includes an aluminum tape layer, a copper wire layer and a polyester tape layer that are closely arranged in sequence. The copper wire layer includes multiple copper wires that are laid flat along the winding direction of the composite shielding tape, and adjacent copper wires are in contact with each other and do not cross.

[0009] Further, an arc-shaped notch that is connected and adapted to the outer peripheral surface of the copper wire is provided on one side of the aluminum tape layer in contact with the copper wire layer, and the copper wire is embedded in the arc-shaped notch.

[0010] Further, the aluminum tape layer, the copper wire layer and the polyester tape layer are bonded into a whole by hot melt adhesive.

[0011] Further, the aluminum tape layer is made of industrial pure aluminum foil with the brand number 1060.

[0012] Furthermore, the thickness of the aluminum strip layer is 0.02 - 0.03 mm, the copper wire is a round copper wire with a diameter of 0.01 mm, and the polyester tape layer uses PET non-bonding resin OPE with a thickness of 0.03 ± 0.01 mm.

[0013] A cable includes the composite shielding tape as described above.

[0014] Adopting the above technical solution, the utility model has the following beneficial effects:

[0015] (1) The utility model changes the structure of the traditional aluminum-plastic composite shielding tape, optimizes the drainage wire from the traditional single thick copper wire or multi-strand copper wire bundle with a larger diameter into multiple single thin copper wires arranged in parallel, and embeds them between the aluminum strip layer and the polyester tape layer to form an integral structure. It can not only maintain excellent anti-interference effect, but also the aluminum strip layer and the polyester tape layer isolate air for the copper wire, making the copper wire not easy to oxidize, ensuring the drainage effect of the copper wire. When applied in the cable, the copper wire does not directly contact the insulating layer and will not damage the insulation. And the copper wires are laid parallel between the aluminum strip layer and the polyester tape layer, and the copper wires contact each other but do not cross, greatly reducing the outer diameter size of the cable.

[0016] (2) By setting the arc-shaped groove in the utility model, the entire area of the aluminum strip layer is in contact with the copper wire, expanding the contact area, which is beneficial for the copper wire to more efficiently lead away the charge attached to the aluminum surface.

[0017] (3) In the utility model, the aluminum strip layer, the copper wire layer and the polyester tape layer are bonded into a whole by hot melt adhesive, which is convenient for production and processing. It is not only firmly bonded and not easy to delaminate, but also does not change the mechanical properties of the composite shielding tape layer.

[0018] (4) The aluminum strip layer of the utility model is made of industrial pure aluminum foil with the grade of 1060, which has low hardness and good toughness, achieving better mechanical properties.

[0019] (5) The utility model uses round copper wires with a diameter of 0.01 mm to form the copper wire layer. When using the adhesive to bond the aluminum strip layer, the copper wire layer and the polyester tape layer together, the bonding is closer. And the thicknesses of the aluminum strip layer and the polyester tape layer are strictly controlled to form an ultra-thin composite shielding tape layer, ensuring excellent mechanical properties.

[0020] (6) The cable of the utility model adopts the composite shielding tape with an optimized structure, which not only has excellent anti-interference effect, but also has a smaller overall outer diameter and better flexibility. The copper wire layer used as the drainage wire does not directly contact the insulating layer, avoiding scratching the insulation and improving the use safety of the cable. Description of the Drawings

[0021] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is provided according to specific embodiments in conjunction with the accompanying drawings, where:

[0022] Figure 1 is a structural schematic diagram of the present utility model;

[0023] Figure 2 is a cross-sectional structural schematic diagram of the present utility model.

[0024] The reference numerals in the accompanying drawings are:

[0025] aluminum tape layer 1, arc notch 1-1, copper wire layer 2, copper wire 2-1, polyester tape layer 3. Specific embodiments

[0026] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific embodiments.

[0027] (Embodiment 1)

[0028] The cable of this embodiment uses a composite shielding tape as shown in Figures 1 to 2 , which includes an aluminum tape layer 1, a copper wire layer 2, and a polyester tape layer 3 arranged in sequence and tightly. The copper wire layer 2 includes multiple copper wires 2-1 arranged flatly along the winding direction of the composite shielding tape. Adjacent copper wires 2-1 are in contact with each other and do not cross. By changing the structure of the traditional aluminum-plastic composite shielding tape, the drainage wire is optimized from a single thick copper wire or a multi-strand copper wire bundle with a large diameter in the traditional one into multiple single thin copper wires arranged in parallel, and is embedded between the aluminum tape layer 1 and the polyester tape layer 3 to form an integral structure. It can not only maintain excellent anti-interference effects, but also the aluminum tape layer 1 and the polyester tape layer 2 isolate air for the copper wires, making the copper wires not easy to oxidize, ensuring the drainage effect of the copper wires. When applied in a cable, the copper wires do not directly contact the insulating layer and will not damage the insulation. And the copper wires are laid parallel between the aluminum tape layer 1 and the polyester tape layer 2, and the copper wires 2-1 are in contact with each other but do not cross, greatly reducing the outer diameter size of the cable.

[0029] Specifically, the aluminum tape layer 1, the copper wire layer 2, and the polyester tape layer 3 are bonded into a whole by hot melt adhesive, which is convenient for production and processing. It is not only firmly bonded and not easy to delaminate, but also does not change the mechanical properties of the composite shielding tape layer. The thickness of the aluminum tape layer 1 is 0.02 - 0.03 mm, the polyester tape layer 3 uses PET non-bonding resin OPE, and the thickness is 0.03 ± 0.01 mm. In order to ensure closer bonding, the copper wires in this embodiment are round copper wires with a diameter of 0.01 mm. By strictly controlling the thickness of the aluminum tape layer 1 and the polyester tape layer 3, an ultra-thin composite shielding tape layer is formed to ensure excellent mechanical properties. In order to achieve better mechanical properties, the aluminum tape layer 1 is made of industrial pure aluminum foil with the grade of 1060, which has low hardness and good toughness.

[0030] To achieve better anti-interference performance, on the side of the aluminum strip layer 1 in contact with the copper wire layer 2, there are arc-shaped notches 1-1 which are connected and adapted to the outer peripheral surface of the copper wire 2-1. Each copper wire 2-1 is embedded in the corresponding arc-shaped notch 1-1, so that the entire area of the aluminum strip layer 1 is in contact with the copper wire 2-1, expanding the contact area and facilitating the copper wire 2-1 to more efficiently draw away the charges attached to the aluminum surface.

[0031] The utility model changes the structure of the traditional aluminum-plastic composite shielding tape. The drainage wire is optimized from the traditional single thick copper wire or multi-strand copper wire bundle with a larger diameter into multiple single thin copper wires arranged in parallel and embedded between the aluminum strip layer 1 and the polyester tape layer 3 to form an integral structure. It can not only maintain excellent anti-interference effect, but also the aluminum strip layer 1 and the polyester tape layer 3 isolate the air from the copper wire 2-1, making the copper wire 2-1 not easy to oxidize and ensuring the drainage effect of the copper wire. When applied in a cable, the copper wire is not in direct contact with the insulating layer and will not damage the insulation. And the copper wires 2-1 are laid in parallel between the aluminum strip layer 1 and the polyester tape layer 3, and the copper wires 2-1 are in contact with each other but not crossed, greatly reducing the outer diameter size of the cable.

[0032] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the utility model. It should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A composite shielding tape, characterized in that: It comprises an aluminum tape layer (1), a copper wire layer (2) and a polyester tape layer (3) which are closely arranged in sequence, wherein the copper wire layer (2) comprises a plurality of copper wires (2-1) which are laid flat along the winding direction of the composite shielding tape, and adjacent copper wires (2-1) are in contact with each other and do not cross each other.

2. A composite shielding tape according to claim 1, characterized in that: The side of the aluminum strip layer (1) in contact with the copper wire layer (2) is provided with an arc-shaped notch (1-1) which is connected and matched with the outer peripheral surface of the copper wire (2-1), and the copper wire (2-1) is embedded in the arc-shaped notch (1-1).

3. A composite shielding tape according to claim 1, characterized in that: The aluminum tape layer (1), the copper wire layer (2) and the polyester tape layer (3) are bonded into a whole by hot-melt adhesive.

4. A composite shielding tape according to claim 1, characterized in that: The aluminum strip layer (1) is made of industrial pure aluminum foil with a grade of 1060.

5. A composite shielding tape according to claim 1, characterized in that: The thickness of the aluminum tape layer (1) is 0.02-0.03 mm, the copper wire (2-1) is a round copper wire with a diameter of 0.01 mm, and the polyester tape layer (3) is PET non-adhesive resin OPE with a thickness of 0.03±0.01 mm.

6. A cable, characterized in that: Comprising the composite shielding tape according to any one of claims 1 to 5.

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