Water-blocking powder for waterproof cable, preparation method of water-blocking powder and waterproof cable

A technology of waterproof cable and water-blocking powder, which is used in cable/conductor manufacturing, insulated cables, cables, etc., can solve the problem that polyacrylic resin cannot play a good role in blocking swelling, poor salt resistance, and poor waterproof performance of waterproof cables. To achieve good waterproof effect, improve waterproof performance, and reduce the length of water seepage

Pending Publication Date: 2021-06-29
上海上力特种电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In related technologies, polyacrylic acid resin is selected as the water-blocking powder. Polyacrylic resin has good water absorption, but its salt resistance is poor
When XLPE cables are used in environments with high salt solution concentrations such as offshore equipment or salt chemical plants, such as polyacrylic resin soaked in seawater (salinity is 35‰

Method used

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  • Water-blocking powder for waterproof cable, preparation method of water-blocking powder and waterproof cable
  • Water-blocking powder for waterproof cable, preparation method of water-blocking powder and waterproof cable
  • Water-blocking powder for waterproof cable, preparation method of water-blocking powder and waterproof cable

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Preparation 1

[0051] A purified lignozoulfonate, which is prepared according to the following method:

[0052] (1) Sodium lignin sulfate is added to the pecker water and mix, formulated into a concentration of 6 wt% lignozo sulfonate mixture;

[0053] (2) Transfer of sodium lignozoulfonate to the UF201 ultrafiltration machine (Wuxi Pujing Technology Development Co., Ltd.), filtering with ultrafiltration membranes with a total number of molecular weights of 10,000, the working pressure is 0.142MPa, The ultrafiltration of the cycle is ultrafiltrated into the ultrafiltration membrane microporous is a colorless transparent solution. This solution is a sodium lignozo sulfonate solution. The number average molecular weight of sodium ligno sulfonate in the solution is 10000, and after drying Purified lignozoulfonate.

Example Embodiment

[0054] Preparation 2

[0055] A differential point of the purified lignozoulfonate, and the preparation of Example 1 is that the interceptor number average molecular weight of the ultrafiltration membrane in step (2) is 3000.

Example Embodiment

[0056] Preparation Example 3

[0057] A differential point of the purified lignozoulfonate, and the preparation of Example 1 is that the interceptor number of ultrafiltration membranes in step (2) is 4000.

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Abstract

The invention relates to the field of cable processing, and particularly discloses water-blocking powder for a waterproof cable, a preparation method of the water-blocking powder and the waterproof cable. The water-blocking powder for the waterproof cable is prepared from the following raw materials in parts by weight: 80-130 parts of acrylic acid, 20-40 parts of lignosulfonate, 10-30 parts of urea, 10-20 parts of kaolin, 1-2 parts of an initiator and 0.3-0.7 part of a cross-linking agent. The preparation method comprises the following steps: carrying out neutralization treatment on acrylic acid, carrying out initiation treatment on acrylic acid, lignosulfonate and urea through an initiator, adding kaolin and a cross-linking agent, carrying out an ultrasonic reaction, and after the reaction is finished, carrying out dehydration, drying and crushing to prepare the water-blocking powder. The waterproof layer of the waterproof cable uses the water-blocking powder, so that a relatively good water-blocking effect can be achieved in a salt solution.

Description

Technical field [0001] The present application relates to the field of cable processing, and more specifically, it involves waterproof powder for waterproof cables and preparation methods and waterproof cables. Background technique [0002] Waterproof cables are collectively referred to as a class of cables that can be used in water, often in water or moisture. At present, my country's most commonly used cable is a crosslinked polyethylene insulated power cable (hereinafter referred to as XLPE cable), the production process of XLPE cable is simple, the mechanical physical properties are excellent, but it is prone to water tree aging, that is, the moisture invasion XLPE cable, and in XLPE The insulating layer of the cable produces a water tree branch. When the water tree branch reaches a certain degree, it transforms into electric tree branches. The electric tree branches have caused damage to the insulating layer under the influence of the operating voltage, shorten the life of X...

Claims

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Application Information

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IPC IPC(8): H01B7/288H01B13/22
CPCH01B7/288H01B13/22
Inventor 陈成州李萍
Owner 上海上力特种电缆有限公司
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