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Cable sheath and preparation method thereof

A cable sheath and sheath technology, which is applied in the field of cable sheath and its preparation, can solve problems such as damage, poor aesthetics, time-consuming and labor-intensive problems, and achieve the effects of avoiding potential safety hazards, good high temperature resistance, and good flame retardancy

Active Publication Date: 2019-06-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of sheath is cumbersome to operate, time-consuming and laborious, and has poor aesthetics, and even directly affects the shape and outer contour volume of the cable, affecting the passability of the cable. Moreover, the screw and the insulating sheath are not integrated, which is easy to cause damage.

Method used

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  • Cable sheath and preparation method thereof
  • Cable sheath and preparation method thereof
  • Cable sheath and preparation method thereof

Examples

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preparation example Construction

[0054] The present invention provides the preparation method of above-mentioned cable jacket, and the steps are as follows:

[0055] Step 1, preparing thermoplastic polyurethane Ⅰ, weighing the composition and parts by weight of each component of thermoplastic polyurethane Ⅰ, stirring and mixing evenly, adding to a twin-screw extruder to melt and extrude, cooling, granulating and drying to obtain thermoplastic polyurethane Ⅰ; extruding The outlet temperature is 135-170°C;

[0056] Step 2, preparing thermoplastic polyurethane II, weighing the composition and parts by weight of each component of thermoplastic polyurethane I, stirring and mixing evenly, adding to a twin-screw extruder to melt and extrude, cooling, granulating and drying to obtain thermoplastic polyurethane I; extruding The outlet temperature is 120-155°C;

[0057] Step 3. Co-extrude or co-inject thermoplastic polyurethane I and thermoplastic polyurethane II to obtain surface layer 1 (a co-extruder die or injecti...

Embodiment 1

[0067] Thermoplastic polyurethane I, composed of 100 parts by weight of thermoplastic polyurethane with a hardness of 91A, 2.5 parts by weight of polyester fiber, 2 parts by weight of expandable graphite, 0.35 parts by weight of ultraviolet light absorber UV326, 7 parts by weight of zinc stearate, 4 parts by weight Aluminum hydroxide, 5 parts by weight of antimony trioxide, 0.6 parts by weight of oxidant 1010, 3.5 parts by weight of silicon carbide powder, 2 parts by weight of thermoplastic styrene-butadiene rubber-maleic anhydride grafts, 4 parts by weight of chlorinated paraffin, 2 parts by weight Parts of organic nano-montmorillonite, 2.8 parts by weight of graphite powder.

[0068] Thermoplastic polyurethane II, composed of: 100 parts by weight of thermoplastic polyurethane with a hardness of 82A, 1.5 parts by weight of antioxidant 2-mercaptobenzimidazole, 1 part by weight of coumarone resin, 1.5 parts by weight of boron nitride powder, 0.8 parts by weight of silane Joint ...

Embodiment 2

[0070] Thermoplastic polyurethane I, composed of 100 parts by weight of thermoplastic polyurethane with a hardness of 88A, 1 part by weight of polyester fiber, 1 part by weight of expandable graphite, 0.1 part by weight of ultraviolet light absorber UV326, 5 parts by weight of zinc stearate, 3 parts by weight Aluminum hydroxide, 4 parts by weight of antimony trioxide, 0.1 parts by weight of oxidizing agent 1010, 2 parts by weight of silicon carbide powder, 1 part by weight of thermoplastic styrene-butadiene rubber-maleic anhydride graft, 3 parts by weight of chlorinated paraffin, 1 part by weight Parts of organic nano-montmorillonite, 2 parts by weight of graphite powder.

[0071] Thermoplastic polyurethane II, composed of: 100 parts by weight of thermoplastic polyurethane with a hardness of 80A, 1 part by weight of antioxidant 2-mercaptobenzimidazole, 0.5 part by weight of coumarone resin, 1 part by weight of boron nitride powder, 0.5 part by weight of silane Joint agent KH55...

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Abstract

The invention relates to a cable sheath and a preparation method thereof, belongs to the technical field of cable sheaths, and solves the technical problem that the insulating sheath in the prior artis generally directly attached outside the taped covering by means of co-extrusion and cannot be used alone, especially for a cable requiring partial package or partial repair, which is not applicable. The cable sheath provided by the invention comprises a sheath body and a closing material, wherein the sheath body is composed of a surface layer, a substrate layer, a pressure resistant layer and an insulating layer which are arranged in order from top to bottom; the surface layer is composed of integrally formed convex strips and concave strips, a first occlusion tooth and a second occlusion tooth; and the closing material is a polyurethane adhesive. The cable sheath provided by the invention is not integrally formed with the cable and can be used alone, is especially suitable for cables requiring partial package or partial repair, has the advantages of high strength, good toughness, bending resistance, good flame retardancy, good high temperature resistance performance and the abilityto meet the weathering and corrosion resistance of the cables to provide effective protection against the cables.

Description

technical field [0001] The invention belongs to the technical field of cable sheaths, and in particular relates to a cable sheath and a preparation method thereof. Background technique [0002] Cables are manufactured from cable sheaths, wrappings and live conductors. The cable jacket is the outermost layer of the cable that insulates and protects the cable. [0003] The commonly used material for cable sheaths is insulating polyvinyl chloride. Although this material has good insulation properties, it has poor wear resistance, temperature resistance, and aging resistance. Thermoplastic polyurethane (also known as TPU) material is called "an epoch-making new polymer material" and is one of the six most promising synthetic materials in the world. Generally, TPU has good mechanical properties (such as high wear resistance), high elasticity and formability, and has been used in many industrial fields, such as automobiles, electric wires, pneumatic hoses, etc. However, TPU has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/02H01B7/295H01B7/04H01B7/28H01B13/24H01B13/22H01B13/06C08L75/04C08L67/00C08L51/04C08L45/02C08K13/06C08K3/34C08K7/24C08K5/098C08K3/22C08K3/04C08K13/02C08K3/38C08K3/02
Inventor 孙俊邦吴志伟朱晓锋李春哲李昌奇王春建肖辉旭宋寒张传刚牛忠成王晓强夏志杨鼎康
Owner STATE GRID CORP OF CHINA