Copper wire offset prevention type water-blocking flat cable

Abstract

The utility model discloses a copper wire offset prevention type water-blocking flat cable, which comprises a conductor layer formed by six oxygen-free copper monofilament conductors arranged in a straight line, and a copper-zinc alloy electroplated layer formed by electroplating on the outer surface of each oxygen-free copper monofilament conductor, the two nylon resin gaskets are symmetrically arranged on the upper side face and the lower side face of the conductor layer and cover the six oxygen-free copper monofilament conductors on the same side to form a cable core which is filled with petroleum jelly. The cable core is sequentially coated with a foamed polyethylene inner insulating layer, a para-position type wholly aromatic copolyamide stretching fiber yarn woven layer and an irradiation crosslinking linear high-density polyethylene outer insulating layer. The flat cable effectively prevents the copper wire conductor from position offset, ensures firm press-fitting connection with the wiring terminal, has better electrical connection reliability, effectively prevents the surface oxidation of the copper wire conductor, has better moisture-proof and waterproof performance, reduces faults, and improves durability.

Description

Technical Field

[0001] The present application belongs to the field of cable technology, and in particular relates to a water-blocking flat cable that prevents copper wire deviation. Background Art

[0002] When the end of the communication equipment cable needs to be wired, a terminal block is required. During the crimping and installation process of the communication cable with the terminal block, the cable is bent under force, and the copper wire conductors arranged in a row inside the cable core are prone to position displacement, so that the axes of each copper wire are no longer in the same plane, resulting in poor contact between the terminal block and each copper wire, and the connection is not firm enough, resulting in poor electrical connectivity, and does not have good moisture-proof and water-resistant properties. The copper wire conductor is easily oxidized and deteriorates such as surface discoloration, has poor durability, and is prone to failure. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide a water-blocking flat cable with an anti-copper wire deviation function, which can effectively prevent the position deviation of the copper wire conductor, ensure a firm press-fit connection with the wiring terminal, improve the reliability of the electrical connection, effectively prevent the surface oxidation of the copper wire conductor, improve moisture-proof and waterproof performance, reduce the occurrence of faults, and improve durability.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The anti-copper wire deviation type water-blocking flat cable comprises six oxygen-free copper monofilament conductors arranged in a straight line to form a conductor layer, the outer surface of the oxygen-free copper monofilament conductor is electroplated to form a copper-zinc alloy electroplating layer, two nylon resin gaskets are symmetrically arranged on the upper and lower sides of the conductor layer and cover the six oxygen-free copper monofilament conductors on the same side to form a cable core, the thickness of the nylon resin gasket is not less than 150 μm, the cable core is filled with petroleum jelly, and the outside of the cable core is sequentially coated with a foamed polyethylene inner insulation layer, a para-type wholly aromatic copolyamide stretched fiber filament braided layer and an irradiation cross-linked linear high-density polyethylene outer insulation layer, the outer surface of the nylon resin gasket is provided with an EVA water-blocking inner bonding layer, the outer surface of the foamed polyethylene inner insulation layer is provided with an EVA water-blocking intermediate bonding layer, and the inner surface of the irradiation cross-linked linear high-density polyethylene outer insulation layer is provided with an EVA water-blocking outer bonding layer.

[0006] Preferably, the thickness of the nylon resin gasket is not greater than 250 μm.

[0007] Preferably, the thickness of the EVA water-blocking inner adhesive layer, the EVA water-blocking middle adhesive layer and the EVA water-blocking outer adhesive layer are all 3 μm to 25 μm.

[0008] Preferably, the outer diameter of the copper monofilament conductor is not less than 1 mm.

[0009] Preferably, the foamed polyethylene inner insulation layer is a foamed polyethylene resin layer with a foaming rate of 70% to 85%.

[0010] Preferably, the thickness ratio of the foamed polyethylene inner insulation layer to the radiation cross-linked linear high-density polyethylene outer insulation layer is 1:1 to 2:1.

[0011] Preferably, the copper-zinc alloy electroplating layer has a thickness of no more than 2 μm.

[0012] Preferably, the para-type wholly aromatic copolyamide stretched fiber yarn braided layer is composed of inner and outer double layers of para-type wholly aromatic copolyamide stretched fiber yarns braided in counter-rotating spirals with a braiding density of not less than 85%.

[0013] Preferably, the winding pitches of the inner and outer double layers of para-type wholly aromatic copolyamide stretched fiber filaments are the same.

[0014] Beneficial effects of this application:

[0015] 1. By adding a nylon resin gasket to the upper and lower sides of the conductor layer formed by six oxygen-free copper monofilament conductors, the nylon resin layer has high hardness, a thickness of 150μm to 250μm, and flexibility, and forms an effective clamping limit for the six oxygen-free copper monofilament conductors. The external foamed polyethylene inner insulation layer is extruded, and the nylon resin gasket is bonded and fixed to the foamed polyethylene inner insulation layer through the EVA water-blocking inner bonding layer, which effectively prevents the six copper monofilament conductors from loosening and position displacement, ensures a firm connection when pressed with the terminal, has better electrical connectivity, reduces failures, and is durable.

[0016] 2. Electroplating the outer surface of the existing oxygen-free copper monofilament conductor to form a copper-zinc alloy electroplating layer inhibits the oxidation of the oxygen-free copper wire and eliminates the discoloration and other degradation caused by oxidation. In addition, by filling petroleum jelly in the gap of the cable core to prevent longitudinal water seepage, and adding EVA water-blocking inner, middle and outer bonding layers, the water vapor diffusion barrier performance is enhanced, the moisture-proof and water-blocking properties of the cable are improved, the electrical insulation properties of the cable are protected, faults are reduced, the cable life is extended, and it is more durable.

[0017] 3. A para-type wholly aromatic copolyamide stretched fiber woven layer is added between the foamed polyethylene inner insulation layer and the irradiated cross-linked linear high-density polyethylene outer insulation layer. The para-type wholly aromatic copolyamide stretched fiber core material has a large tensile elastic modulus and is bonded together through an EVA water-blocking adhesive layer, which helps to improve the mechanical strength, tensile strength and electrical insulation of the insulation layer, and has better durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0019] Description of reference numerals:

[0020] 1- oxygen-free copper monofilament conductor, 2- conductor layer, 3- copper-zinc alloy electroplating layer, 4- nylon resin gasket, 5- petroleum jelly, 6- foamed polyethylene inner insulation layer, 7- para-type fully aromatic copolyamide stretched fiber woven layer, 8- irradiated cross-linked linear high-density polyethylene outer insulation layer, 9- EVA water-blocking inner bonding layer, 10- EVA water-blocking middle bonding layer, 11- EVA water-blocking outer bonding layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0022] See also Figure 1 The anti-copper wire deviation type water-blocking flat cable of the embodiment of the present application comprises six oxygen-free copper monofilament conductors 1 arranged in a straight line to form a conductor layer 2, the outer surface of the oxygen-free copper monofilament conductor 1 is electroplated to form a copper-zinc alloy electroplating layer 3, the outer diameter of the copper monofilament conductor 1 is not less than 1mm, and the thickness of the copper-zinc alloy electroplating layer 3 is not more than 2μm. Two nylon resin gaskets 4 are symmetrically arranged on the upper and lower sides of the conductor layer 2 and cover the six oxygen-free copper monofilament conductors 1 on the same side to form a cable core, and the thickness of the nylon resin gasket 4 is not less than 150μm and not more than 250μm. The cable core is filled with petroleum jelly 5.

[0023] The cable core is coated with a foamed polyethylene inner insulation layer 6, a para-type fully aromatic copolyamide stretched fiber filament braided layer 7 and an irradiated cross-linked linear high-density polyethylene outer insulation layer 8 in sequence. Specifically, the foamed polyethylene inner insulation layer 6 is a foamed polyethylene resin layer with a foaming rate of 70% to 85%. The thickness ratio of the foamed polyethylene inner insulation layer 6 and the irradiated cross-linked linear high-density polyethylene outer insulation layer 8 is 1:1 to 2:1. The outer surface of the nylon resin gasket 4 is provided with an EVA water-blocking inner adhesive layer 9, the outer surface of the foamed polyethylene inner insulation layer 6 is provided with an EVA water-blocking intermediate adhesive layer 10, and the inner surface of the irradiated cross-linked linear high-density polyethylene outer insulation layer 8 is provided with an EVA water-blocking outer adhesive layer 11. The thickness of the EVA water-blocking inner adhesive layer 9, the EVA water-blocking intermediate adhesive layer 10 and the EVA water-blocking outer adhesive layer 11 are all 3μm to 25μm. In one embodiment, the para-type wholly aromatic copolyamide stretched fiber yarn braided layer 7 is composed of an inner and outer double layer of para-type wholly aromatic copolyamide stretched fiber yarns that are woven in counter-rotating spirals with a braiding density of not less than 85%. Furthermore, the inner and outer double layers of para-type wholly aromatic copolyamide stretched fiber yarns have the same winding pitch.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. Anti-copper wire deviation type water-blocking flat cable, its characteristics are: The cable comprises six oxygen-free copper monofilament conductors (1) arranged in a straight line to form a conductor layer (2), the outer surface of the oxygen-free copper monofilament conductor (1) being electroplated to form a copper-zinc alloy electroplating layer (3), two nylon resin gaskets (4) being symmetrically arranged on the upper and lower sides of the conductor layer (2) and covering the six oxygen-free copper monofilament conductors (1) on the same side to form a cable core, the thickness of the nylon resin gaskets (4) being not less than 150 μm, the cable core being filled with petroleum jelly (5), the outer surface of the cable core being sequentially coated with a foamed polyethylene inner insulation layer (6), a para-type fully aromatic copolyamide stretched fiber filament braided layer (7) and an irradiated cross-linked linear high-density polyethylene outer insulation layer (8), the outer surface of the nylon resin gasket (4) being provided with an EVA water-blocking inner bonding layer (9), the outer surface of the foamed polyethylene inner insulation layer (6) being provided with an EVA water-blocking intermediate bonding layer (10), and the inner surface of the irradiated cross-linked linear high-density polyethylene outer insulation layer (8) being provided with an EVA water-blocking outer bonding layer (11).

2. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The thickness of the nylon resin gasket (4) is not greater than 250 μm.

3. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The thickness of the EVA water-blocking inner adhesive layer (9), the EVA water-blocking middle adhesive layer (10) and the EVA water-blocking outer adhesive layer (11) are all between 3 μm and 25 μm.

4. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The outer diameter of the copper monofilament conductor (1) is not less than 1 mm.

5. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The foamed polyethylene inner insulating layer (6) is a foamed polyethylene resin layer with a foaming rate of 70% to 85%.

6. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The thickness ratio of the foamed polyethylene inner insulation layer (6) to the radiation cross-linked linear high-density polyethylene outer insulation layer (8) is 1:1 to 2:

1.

7. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The copper-zinc alloy electroplating layer (3) has a thickness of no more than 2 μm.

8. The anti-copper wire deviation type water-blocking flat cable according to claim 1, characterized in that: The para-type wholly aromatic copolyamide stretched fiber yarn braided layer (7) is composed of inner and outer double layers of para-type wholly aromatic copolyamide stretched fiber yarns that are mutually reversely spirally wound and braided, and the braiding density is not less than 85%.

9. The anti-copper wire deviation type water-blocking flat cable according to claim 8, characterized in that: The winding pitches of the inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber filaments are the same.

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