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Method for Improving the Adhesion between Submarine Cable Insulation Layer and Copper Pipe

A technology of insulating layer and cohesive force, which is applied in the direction of optical fiber/cable installation, instrumentation, optics, etc., can solve the problems of PE sheath layer pull-off, submarine cable damage, etc., achieve tight bonding, improve cohesive force, and enhance performance effect

Active Publication Date: 2018-11-20
JIANGSU HENGTONG MARINE CABLE SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the laying process of the submarine optical cable, the weight and tension of the submarine cable will cause relative slippage of the inner layers of the submarine optical cable. When the internal PE sheath layer and the copper tube layer slip too much, the PE sheath layer will be damaged. Pulled off, resulting in damage to the submarine cable

Method used

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  • Method for Improving the Adhesion between Submarine Cable Insulation Layer and Copper Pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Reference figure 1 As shown, embodiment 1 discloses a method for improving the adhesion between the submarine cable insulation layer and the copper pipe, and the method has the following steps:

[0032] Step 1: Mix the ethylene acrylic acid copolymer and polyethylene uniformly to obtain a bonding material, wherein the above ethylene acrylic acid copolymer accounts for 10% of the bonding material by mass, and the above polyethylene accounts for 90% of the bonding material by mass;

[0033] Step 2: Prepare polyethylene material as the insulating layer material;

[0034] Step 3. Dry the bonding material prepared in step 1 and the insulating material prepared in step 2 with a dryer, and dry for 2 hours, and then preheat the single screw extruder to 160°C;

[0035] Step 4. The copper pipe is laid out. Before the copper pipe enters the die of the extruder, it is cleaned with alcohol, and the preheater is used to preheat the copper pipe. After preheating, the surface temperature of th...

Embodiment 2

[0039] Embodiment 2 discloses a method for improving the adhesion between the submarine cable insulation layer and the copper pipe, which mainly includes the following steps:

[0040] Step 1: Mix the ethylene acrylic acid copolymer and polyethylene uniformly to obtain a bonding material, wherein the above-mentioned ethylene acrylic acid copolymer accounts for 55% by mass of the bonding material, and the above-mentioned polyethylene accounts for 45% by mass of the bonding material;

[0041] Step 2: Prepare polyethylene material as the insulating layer material;

[0042] Step 3: Dry the bonding material prepared in step 1 and the insulating material prepared in step 2 with a dryer, and dry for 3 hours, and then preheat the single screw extruder to 225°C;

[0043] Step 4. The copper pipe is laid out. Before the copper pipe enters the die of the extruder, it is cleaned with alcohol and the preheater is used to preheat the copper pipe. After preheating, the surface temperature of the copper...

Embodiment 3

[0047] Embodiment 3 discloses a method for improving the adhesion between the submarine cable insulation layer and the copper pipe, which mainly includes the following steps:

[0048] Step 1. Use 100% ethylene acrylic acid copolymer (EAA) as the bonding material;

[0049] Step 2: Prepare polyethylene material as the insulating layer material;

[0050] Step 3. Dry the bonding material prepared in step 1 and the insulating material prepared in step 2 with a dryer, and dry for 4 hours, and then preheat the single-screw extruder to 290°C;

[0051] Step 4. Put the copper pipe out. Before the copper pipe enters the die of the extruder, clean it with alcohol, and use a preheater to preheat the copper pipe. After preheating, the surface temperature of the copper pipe is 200℃;

[0052] Step 5. The single-screw extruder adopts a double-layer co-extrusion mode to extrude a bonding layer and an insulating layer on the surface of the copper pipe. The thickness of the bonding layer is 0.5mm and the t...

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Abstract

The invention discloses a method for improving binding power of a submarine cable insulating layer and a copper tube. The method includes the steps that ethylene acrylic acid copolymer and polyethylene are mixed to be uniform, and a binding material is obtained; a polyethylene material serves as an insulating layer material; a drying machine is utilized to dry the binding material and the insulating material, and then a single screw extruder is preheated to 160-290 DEG C; the copper tube is subjected to paying off, the copper tube is cleaned with ethyl alcohol in the first place before entering an extruder die head and preheated with a preheater, and the surface temperature of the preheated copper tube is 60-200 DEG C; a double-layer co-extrusion mode is adopted for the single screw extruder, and a binding layer and an insulating layer are arranged on the surface of the copper tube in an extrusion molding mode; gradually cooling is conducted with a cold water groove. The method is simple, operation is convenient to conduct, the binding power between the copper tube and the insulating layer is greatly improved, and the problem that the insulating layer falls off the copper tube in the laying process of a submarine cable is solved.

Description

Technical field [0001] The invention relates to the field of submarine cables, in particular to a method for improving the bonding force between the insulating layer of the submarine cable and a copper pipe. Background technique [0002] Submarine optical cables have played an important role in the field of communications, especially international communications, with their advantages of large capacity, high reliability and excellent transmission quality. [0003] During the laying process of the submarine optical cable, the weight and tension of the submarine cable will cause relative slippage of the inner layers of the submarine optical cable. When the inner PE sheath layer and the copper pipe layer slip too much, the PE sheath layer will be damaged. Pull off, resulting in damage to the submarine cable. Therefore, in the production of submarine optical cables, there are higher requirements for the adhesion between the PE sheath and the copper pipe. [0004] In order to solve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/50
CPCG02B6/506G02B6/508
Inventor 沈韦韦许人东孙贵林孙晓华叶明君张超王安亮马建林杜万尧
Owner JIANGSU HENGTONG MARINE CABLE SYST CO LTD
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