Unshielded twisted pair cable and preparation method thereof

A twisted pair and unshielded technology, applied in the field of unshielded twisted pair cables and their preparation, can solve the problems of difficulty in obtaining high flame retardant properties and high mechanical properties of cable materials, small cable transmission capacity, large corona loss, etc. , to increase anti-ultraviolet and anti-aging properties, reduce corona loss, improve flame retardant properties and mechanical properties

Inactive Publication Date: 2020-08-28
MIANYANG BAOHE TAIYUE COMM CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide an unshielded twisted-pair cable, which can solve the problems of small power transmission capac

Method used

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  • Unshielded twisted pair cable and preparation method thereof
  • Unshielded twisted pair cable and preparation method thereof
  • Unshielded twisted pair cable and preparation method thereof

Examples

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preparation example Construction

[0031] A kind of preparation method of unshielded twisted pair cable, comprises the following steps:

[0032] S1. Wire drawing: select copper material, use a wire drawing machine to make core wire conductors, and wrap the outer insulation layer of each single wire conductor;

[0033] S2. Twisting: Two core wires are a set of twisted wire pairs, which are twisted together in a twisted structure;

[0034] S3. Cabling: Use a pre-twisting cable machine to form a cable, and the untwisting rate is controlled at 15-25%;

[0035] S4. Sheath: Mix the glass fiber, elastomer, carbon black, polyphosphazene, and antioxidant according to the mass and fraction ratio, mechanically stir to obtain a mixture, extrude and pelletize the mixture to obtain a sheath Cover; wrap a layer of sheath on the outside of the cable; protect the cable.

[0036] S5. Packaging: Using network analyzers, all products are packaged out of the warehouse after strict high-frequency and low-frequency tests.

Embodiment 1

[0038] This embodiment provides an unshielded twisted-pair 3 cable, including a twisted-pair layer 2 and a sheath 1 covering the twisted-pair layer 2. The twisted-pair layer 2 includes two layers arranged sequentially from the inside to the outside. Protective layer, the inner protective layer 23 is formed in a circle by 3 twisted pairs 3, and the outer protective layer 21 is formed in a circle by 7 twisted pairs 3; from the inner protective layer 23 to the outer layer In the direction of the protective layer 21, the diameter of the twisted pair 3 gradually increases, wherein the gradient of the diameter of the twisted pair 3 in the protective layer is 0.1mm, and the minimum diameter of the twisted pair 3 in the innermost protective layer is 0.1mm .

[0039] The sheath 1 includes the following components: 35 parts of glass fiber, 8 parts of SBS, 18 parts of carbon black, 4 parts of polyphosphazene, and 3 parts of antioxidant.

[0040] This embodiment also provides a method fo...

Embodiment 2

[0043] This embodiment provides an unshielded twisted-pair 3 cable, including a twisted-pair layer 2 and a sheath 1 covering the twisted-pair layer 2. The twisted-pair layer 2 includes two layers arranged sequentially from the inside to the outside. Protective layer, the inner protective layer 23 is formed in a circle by 3 twisted pairs 3, and the outer protective layer 21 is formed in a circle by 7 twisted pairs 3; from the inner protective layer 23 to the outer layer In the direction of the protective layer 21, the diameter of the twisted pair 3 gradually increases, wherein the gradient of the diameter of the twisted pair 3 in the protective layer is 0.2mm, and the minimum diameter of the twisted pair 3 in the innermost protective layer is 0.2mm .

[0044] The cable sheath 1 includes the following components: 17 parts of glass fiber, 5 parts of SBS, 15 parts of carbon black, 1 part of polyphosphazene, and 1 part of antioxidant.

[0045] This embodiment also provides a metho...

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Abstract

The invention relates to the field of cables, and discloses an unshielded twisted pair cable. The cable comprises a twisted-pair layer and a sheath coating the twisted-pair layer. The twisted-pair layer comprises a plurality of protective layers which are sequentially arranged from inside to outside, and each protective layer is formed by enclosing a plurality of twisted pairs into a circle; the diameter of the twisted pair is gradually increased from the inner protective layer to the outer protective layer; the cable can solve the problem that a cable material with high flame retardant property and high mechanical property is difficult to obtain in the prior art; the preparation method of the unshielded twisted pair cable comprises the following steps of wire drawing, pair twisting, cabling, sheathing and packaging, the preparation method is scientific, reasonable and simple in design and simple to operate, and large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an unshielded twisted-pair cable and a preparation method thereof. Background technique [0002] The cable is usually a rope-like cable twisted by several or several groups of wires. Each group of wires is insulated from each other, and is often twisted around a center, and the entire outside is covered with a highly insulating covering. Most of them are erected in the air or installed underground or underwater for telecommunications or power transmission; at the same time, they also require the advantages of small footprint, light weight, and good flexibility to ensure high-reliability signal transmission in harsh environments. [0003] However, the multiple twisted wires in the existing cables are basically the same diameter, that is, the same cross-sectional area. When outputting, the current density, transmission capacity and corona loss are not ideal, especially for high-alti...

Claims

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Application Information

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IPC IPC(8): H01B13/02H01B3/08H01B3/42H01B5/08H01B7/18H01B7/295H01B13/06H01B13/24
CPCH01B3/082H01B3/421H01B5/08H01B7/18H01B7/295H01B13/02H01B13/06H01B13/24
Inventor 范敦现
Owner MIANYANG BAOHE TAIYUE COMM CABLE
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