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A kind of sheathed flexible cable and its preparation method

A flexible cable and sheath type technology, used in cable/conductor manufacturing, insulated cables, cables, etc., can solve the problems of water tree branches in the insulation layer, cable aging, cable breakdown, etc.

Active Publication Date: 2021-06-29
JIANGSU ZHONGTIAN TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the insulation layer and the sheath have no water blocking layer, moisture can easily penetrate into the insulation layer. Under the operation of strong electric field, the insulation layer will produce "water tree branch" phenomenon, which will accelerate the aging of the cable, and the phenomenon of premature cracking may occur before the design life of the cable. , resulting in cable breakdown

Method used

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  • A kind of sheathed flexible cable and its preparation method
  • A kind of sheathed flexible cable and its preparation method
  • A kind of sheathed flexible cable and its preparation method

Examples

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preparation example Construction

[0060] The present invention has no special limitation on the preparation method of the double-sided hot-melt polyester tape, and any method known to those skilled in the art will suffice.

[0061] In some specific embodiments of the present invention, the number of layers of the double-sided hot-melt polyester tape is two.

[0062] In the present invention, the tensile force of the hot-melt polyester tape should be greater than 100N, and the elongation at break should be greater than 60%.

[0063] The present invention also provides a method for preparing a sheathed flexible cable, comprising the following steps:

[0064] The insulated core is wrapped or dragged with a hot-melt polyester tape, and then the sheath layer is extruded, and after cooling, a sheathed flexible cable is obtained.

[0065] First, the insulated wire core is wrapped or wrapped with a hot-melt polyester tape, and the covering rate of the wrapped or dragged hot-melt polyester tape is 0% to 10%.

[0066]...

Embodiment 1

[0085] The structure of the double-sided hot-melt polyester tape includes a PET substrate film layer with a thickness of 0.017mm, an inner hot-melt adhesive layer with a thickness of 0.003mm in contact with the insulating layer and a thickness of 0.008mm in contact with the sheath layer. mm outer hot melt adhesive layer.

[0086] The inner hot melt adhesive layer is prepared from the following raw materials in parts by weight:

[0087] 98 parts by weight of polyurethane, 0.5 parts by weight of nano-calcium carbonate reinforcing agent, 0.2 parts by weight of diphenylamine, 0.2 parts by weight of polycarbodiimide, 0.05 parts by weight of dibutyl hydroxytoluene, and acetone of 0.05 parts by weight;

[0088] The outer hot melt adhesive layer is prepared from the following raw materials in parts by mass:

[0089] 90 parts by weight of polyurethane, 2 parts by weight of polyolefin, 1 part by weight of dicumyl peroxide, 1 part by weight of nanometer calcium carbonate reinforcing age...

Embodiment 2

[0092] The structure of the double-sided hot-melt polyester tape includes a PET substrate film layer with a thickness of 0.017mm, an inner hot-melt adhesive layer with a thickness of 0.003mm in contact with the insulating layer and a thickness of 0.008mm in contact with the sheath layer. mm outer hot melt adhesive layer.

[0093] The inner hot melt adhesive layer is prepared from the following raw materials in parts by weight:

[0094] 99 parts by weight of polyurethane, 0.9 parts by weight of nano-calcium carbonate reinforcing agent, 0.5 parts by weight of diphenylamine, 0.5 parts by weight of polycarbodiimide, 0.1 parts by weight of dibutyl hydroxytoluene, and 0.1 parts by weight of acetone;

[0095] The outer hot melt adhesive layer is prepared from the following raw materials in parts by mass:

[0096] 95 parts by weight of polyurethane, 4 parts by weight of polyolefin, 2 parts by weight of dicumyl peroxide, 1.9 parts by weight of nano-calcium carbonate reinforcing agent,...

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Abstract

The invention provides a sheathed flexible cable, which is prepared from a conductor, an insulating layer coated on the surface of the conductor, a hot-melt polyester tape and a sheath layer in sequence, and the hot-melt polyester tape is a double One-sided hot-melt adhesive type hot-melt polyester tape, the double-sided hot-melt adhesive type hot-melt polyester tape includes a substrate film layer, an inner hot-melt adhesive layer in contact with the insulating layer and an inner hot-melt adhesive layer in contact with the sheath layer The outer hot melt adhesive layer. According to the different coating proportions and formulations of the hot-melt adhesive layers on both sides of the hot-melt polyester tape, the invention can meet the requirement that the sheath layer and the insulating layer can be easily peeled off when the cable is laid, and at the same time play the role of blocking water vapor in practical applications. At the same time, due to the effect of the polyester layer between the insulating layer and the sheath, the cable also has a certain effect on blocking water vapor in the lateral direction.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a sheathed flexible cable and a preparation method thereof. Background technique [0002] Wires and cables, as blood vessels and nerves for power and information transmission, promote the sustainable development of the national economy and society. The application of wire and cable is closely related to the laying environment, especially in high humidity or water environment, the waterproof ability of the spacer layer between the insulating layer and the sheath layer is required to be stronger. When the insulation layer and the sheath have no water blocking layer, moisture can easily penetrate into the insulation layer. Under the operation of strong electric field, the insulation layer will produce "water tree branch" phenomenon, which will accelerate the aging of the cable, and the phenomenon of premature cracking may occur before the design life of the cable. , resu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/282H01B7/38H01B13/22C09J7/35C09J7/25C09J175/04C09J11/04C09J11/06C09J11/08
CPCC08K2003/265C08K2201/011C08L2203/202C09J11/04C09J11/06C09J11/08C09J175/04C09J2203/302C09J2423/00C09J2467/006C09J2475/00C09J7/255C09J7/35H01B7/2825H01B7/38H01B13/22C08K13/02C08K3/26C08K5/18C08K5/13C08L23/00Y02A30/14
Inventor 姜青松梁斌解向前周佳龙陈晖
Owner JIANGSU ZHONGTIAN TECH CO LTD
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