Pre-coated conductor ribbon cotton covered wire

Abstract

The utility model relates to the technical field of wires and cables, in particular to a pre-coated conductor ribbon covered wire, which is characterized in that an inner insulating layer integrated with a conductor is tightly attached to the outer layers of the upper and lower surfaces of the conductor, an outer insulating layer is arranged between the outer side of the inner insulating layer and the conductor, a protective layer is arranged on the outer side of the outer insulating layer, and the conductor is an annealed super-soft copper strip conductor. The inner insulating layer is a silica gel film insulating layer, the outer insulating layer is a spherical silicon dioxide-polyimide insulating paint insulating layer, and the protective layer is a flexible silicon rubber film protective layer. The product is ultra-thin and ultra-soft, high in production speed and low in cost, and is suitable for current transmission and signal transmission of low-power electric appliances and weak current signal communication equipment; higher practical value is realized in the fields of military industry, electronics, aerospace, high-temperature-resistant equipment and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wires and cables, in particular to a pre-coated conductor thin strip cloth electric wire. Background Art

[0002] Flexible wiring harness is widely used in drag chain cables and elevator cables. It is usually produced with flexible rubber, polyolefin and other elastomeric materials, but these traditional materials and processes have high production costs and slow production speeds, resulting in high product prices. Its performance in terms of temperature resistance and flame retardancy is subject to the characteristics of the base material, and its temperature resistance is generally lower than 125°C. It needs to be highly dependent on flame retardants in terms of flame retardancy and is easily interfered by external electromagnetic signals.

[0003] Based on the above reasons, the utility model designs a pre-coated conductor thin strip cloth wire, which achieves good temperature and flame retardancy, higher mechanical strength and environmental protection effects by improving the material and structural composition of each insulating layer and protective layer inside the wire. Summary of the invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pre-coated conductor thin strip cloth wire, which achieves good temperature resistance and flame retardancy, higher mechanical strength and environmental protection effects by improving the material and structural composition of the insulating layers and protective layers inside the wire.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a pre-coated conductor thin strip cloth wire, comprising a conductor, an inner insulating layer, an outer insulating layer and a protective layer, wherein the upper and lower outer layers of the conductor are tightly provided with the inner insulating layer which forms a whole with the conductor, the outer side of the inner insulating layer and between the conductors are the outer insulating layer, the outer side of the outer insulating layer is the protective layer, the conductor is an annealed super-flexible copper strip conductor, the inner insulating layer is a silicone film insulating layer, the outer insulating layer is a spherical silica-polyimide insulating varnish insulating layer, and the protective layer is a flexible silicone rubber film protective layer.

[0006] The conductor is a plurality of annealed ultra-flexible copper strips arranged at equal distances, and the size of the plurality of conductors is consistent.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] It has good flexibility, can be produced in large lengths and can be bent and installed in a narrow space; the product has good structural stability, and the spherical silica-polyimide composite film used overcomes the defect of low fracture productivity of ordinary polyimide after film formation.

[0009] Good acid and oil resistance: During the production, storage and transportation process, any liquid erosion will not affect the application function of the product; the utility model has outstanding low temperature resistance, and can have the necessary mechanical strength and toughness at low temperatures of -200°C and above, and will not crack due to low temperature embrittlement. The flexible silicone rubber film outside the spherical silica-polyimide insulation composite film is a protective measure taken against the poor alkali resistance of the polyimide material, which isolates the spherical silica-polyimide insulation composite film from alkaline substances.

[0010] At the same time, the production cost of the utility model is relatively low, it is made of halogen-free, non-toxic and non-corrosive materials, and can still work normally in specific environments such as high temperature, mechanical shock, mechanical vibration, polar ultra-low temperature, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0012] Description of reference numerals:

[0013] 1 is the conductor, 2 is the inner insulation layer, 3 is the outer insulation layer, and 4 is the protective layer. DETAILED DESCRIPTION

[0014] The utility model is now further described with reference to the accompanying drawings.

[0015] See also Figure 1 The utility model provides a pre-coated conductor thin strip cloth wire, comprising a conductor 1, an inner insulating layer 2, an outer insulating layer 3 and a protective layer 4. The upper and lower outer layers of the conductor 1 are tightly provided with the inner insulating layer 2 which forms an integral part with the conductor 1. The outer side of the inner insulating layer 2 and between the conductor 1 are the outer insulating layer 3. The outer side of the outer insulating layer 3 is the protective layer 4. The conductor 1 is an annealed ultra-flexible copper strip conductor, the inner insulating layer 2 is a silicone film insulating layer, the outer insulating layer 3 is a spherical silica-polyimide insulating varnish insulating layer, and the protective layer 4 is a flexible silicone rubber film protective layer.

[0016] The conductor 1 is a plurality of annealed ultra-flexible copper strips arranged at equal distances.

[0017] The dimensions of conductor 1 remain constant.

[0018] Working principle:

[0019] In the utility model, the conductor 1 is an annealed ultra-flexible copper tape conductor with good surface finish. The inner insulating layer 2 of a silicone film with excellent insulating performance is respectively attached to the upper and lower surfaces of the conductor 1 by a hot compress process. The outer insulating layer 3 is made of spherical silica-polyimide insulating varnish, wherein when the conductor 1 passes through the spherical silica-polyimide insulating varnish continuously and quickly, it is evenly coated on the surface of the conductor 1 to form the outer insulating layer 3. The flexible silicone rubber film is used as a protective layer 4 and is pulled by a pulling roller. Then, the upper and lower surfaces of multiple conductors 1 coated with spherical silica-polyimide insulating varnish on the same plane are tightly bonded together; the wire with the flexible silicone rubber film protective layer 4 is passed through an electric heating roller to heat and cure the spherical silica-polyimide insulating varnish, and at the same time, through the extrusion of the roller, the excess spherical silica-polyimide insulating varnish is filled into the gap between the conductors 1 to form the outer insulator 3 between the conductors 1.

[0020] The dielectric constant of common polyimide insulating varnish without spherical silica hybridization is 3.4, which is larger than the dielectric constant of polyethylene material 2.3, but significantly better than the dielectric constant of traditional polyvinyl chloride insulating material 4 to 6. The dielectric constant of the spherical silica-polyimide insulating composite film of the utility model is generally less than 3.0, which is significantly better than the dielectric constant of common polyimide material.

[0021] The elongation at break of common polyimide materials is generally not less than 25%, but it is significantly lower than the elongation at break requirement of not less than 100% for wire and cable insulation materials. The elongation at break of the polyimide composite film hybridized with spherical silica in the utility model is at least 60%. When the content of nano-scale silica in the spherical silica-polyimide insulation composite film reaches 20%, its elongation at break is not less than 80%, which can meet the normal working requirements of wires and cables.

[0022] Polyimide has high radiation resistance, and its film is 5×10 9 The strength retention rate after rad fast electron irradiation is 90%.

[0023] The normal operating temperature of polyimide composite film wires and cables is -200 to 300°C, which is higher than the normal operating temperature of traditional silicone rubber, which is -60 to 250°C.

[0024] Polyimide is a self-extinguishing polymer with low smoke generation rate and a temperature resistance of 400°C, which has good flame retardant properties. In the event of a fire, the utility model will not burn due to its characteristics, so it will not produce high-density smoke that affects people's escape. The spherical silica-polyimide insulation composite film is environmentally friendly and non-toxic, and has been used in tableware and medical instruments, further improving the environmental protection effect of the utility model.

[0025] Flexible silicone rubber film has good electrical insulation properties and resistance to mechanical damage, and plays multiple roles in electrical insulation and protection.

[0026] This application has the following technical parameters:

[0027] Power cord test voltage:

[0028] Working voltage: 300 / 300V; test voltage 1500V.

[0029] Working voltage: 300 / 500V; test voltage 2000V.

[0030] Working voltage: 450 / 750V; test voltage 2500V.

[0031] Temperature range: Mobile working conditions: -100℃~300℃; Fixed working conditions: -200℃~300℃. Bending radius: Mobile working conditions: Minimum: cable diameter × 10; Fixed working conditions; Minimum: cable diameter × 6.

[0032] Torsion range: max.±450° / m.

[0033] Bending times: 500,000 times.

[0034] Core insulation resistance at room temperature: >5000MΩ.km.

[0035] The above are only preferred implementations of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0036] The utility model solves the problems in the prior art that the flexible cloth wire is subject to the high production cost of traditional materials and processes, the production speed is slow, resulting in high product prices, and the performance in terms of temperature resistance and flame retardancy is subject to the characteristics of the basic materials, the temperature resistance is generally lower than 125°C, the flame retardancy needs to be highly dependent on flame retardants, and it is easy to be interfered by external electromagnetic signals. By improving the material, structural composition and preparation process of various parts inside the wire, the defect of the existing unsheathed cloth wire products being unprotected is compensated, and the deficiency of the sheathed wire products that the insulating sheath is produced in different processes with high cost and long cycle is compensated. At the same time, the product is ultra-thin and ultra-flexible, the production speed is fast, the cost is low, and it is suitable for current transmission and signal transmission of small-power electrical appliances and weak-current signal communication equipment, and has higher practical value in the fields of military industry, electronics, aerospace, high-temperature resistant equipment, etc.

Claims

1. A pre-coated conductor thin strip cloth wire, It is characterized in that The invention comprises a conductor (1), an inner insulating layer (2), an outer insulating layer (3) and a protective layer (4); the inner insulating layer (2) is tightly arranged on the upper and lower outer layers of the conductor (1) and forms an integral body with the conductor (1); the outer side of the inner insulating layer (2) and between the conductor (1) is the outer insulating layer (3); the outer side of the outer insulating layer (3) is the protective layer (4); the conductor (1) is an annealed ultra-flexible copper tape conductor; the inner insulating layer (2) is a silicone film insulating layer; the outer insulating layer (3) is a spherical silicon dioxide-polyimide insulating varnish insulating layer; and the protective layer (4) is a flexible silicone rubber film protective layer.

2. The pre-coated conductive tape cloth electric wire according to claim 1, It is characterized in that The conductor (1) is a plurality of conductors arranged at equal distances.

3. The pre-coated conductive tape cloth electric wire according to claim 2, It is characterized in that The dimensions of the conductor (1) remain consistent.

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