PMA-EVAL high-strength cable sealing sheath and preparation method thereof

A cable sealing and high-strength technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of cracking, mechanical properties of the sealing sheath, and plummeting performance of the sealing sheath.

Inactive Publication Date: 2016-03-23
WUHU HANGTIAN SPECIAL CABLE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the passage of time, the mechanical properties of the sealing sheath will decline due to aging or corrosion, and even cracks will occur.
This situation occurs extremely frequently in submarine cables, because submarine cables not only have to withstand huge pressure, but also are eroded by seawater, which makes the performance of the sealing sheath plummet, thereby reducing the performance of the cable

Method used

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  • PMA-EVAL high-strength cable sealing sheath and preparation method thereof
  • PMA-EVAL high-strength cable sealing sheath and preparation method thereof
  • PMA-EVAL high-strength cable sealing sheath and preparation method thereof

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preparation example Construction

[0014] The invention provides a kind of preparation method of PMA-EVAL high-strength cable sealing sheath, and this preparation method comprises:

[0015] 1) water glass is mixed with sulfuric acid solution to form hydrogel;

[0016] 2) Soak bentonite in hydrochloric acid solution for activation treatment, then filter to get filter cake to make modifier;

[0017] 3) PMA (polymethyl acrylate), EVAL (ethylene-vinyl alcohol copolymer), the complex shown in formula (I), limestone, butylene phthalate, hydrazine, sinigrin, diborane Alkanes, glycerol, triallyl cyanurate, 2-thiol benzothiazole, hydrogel and modifier mixing, cooling molding to make PMA-EVAL high-strength cable sealing sheath;

[0018]

[0019] In step 1) of the present invention, the consumption of each material can be selected in a wide range, but in order to make the obtained cable sealing sheath have more excellent mechanical properties, corrosion resistance and pressure resistance performance, preferably, in I...

Embodiment 1

[0031] 1) At 40° C., water glass and sulfuric acid solution (concentration: 18% by weight) were mixed according to the weight ratio of 400 for 2.5 hours to form a hydrogel;

[0032] 2) At 80°C, mix bentonite and hydrochloric acid solution (concentration: 27% by weight) according to the weight ratio of 100:230 for 4 hours to activate the bentonite, and then filter the filter cake to obtain the modifier;

[0033] 3) PMA (weight-average molecular weight is 10000), EVAL (weight-average molecular weight is 7000), the complex compound shown in formula (I), limestone, butylene phthalate, hydrazine, sinigrin, ethyl boron Alkanes, glycerol, triallyl cyanurate, 2-mercaptobenzothiazole, hydrogels and modifiers according to 100:40:2.5:50:18:7:9:5:17: 22:13:24:25 mixing and kneading at 218°C for 70mim, cooling and molding at 13°C to obtain PMA-EVAL high-strength cable sealing sheath A1.

Embodiment 2

[0035] 1) At 35° C., water glass and sulfuric acid solution (concentration: 15% by weight) were mixed according to a weight ratio of 300 for 2 hours to form a hydrogel;

[0036] 2) At 78°C, mix bentonite and hydrochloric acid solution (concentration: 25% by weight) for 3 hours according to the weight ratio of 100:200 to activate the bentonite, and then filter the filter cake to obtain the modifier;

[0037] 3) PMA (weight-average molecular weight is 9000), EVAL (weight-average molecular weight is 5000), complex compound shown in formula (I), limestone, butylene phthalate, hydrazine, sinigrin, diborane Alkane, glycerol, triallyl cyanurate, 2-mercaptobenzothiazole, hydrogel and modifier according to 100:35:1.5:35:12:5:7:3:14: 15:10:20:20 mixing and kneading at 215°C for 60mim, cooling and molding at 10°C to obtain PMA-EVAL high-strength cable sealing sheath A2.

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Abstract

The invention discloses a PMA-EVAL high-strength cable sealing sheath and a preparation method thereof. The preparation method comprises the steps that (1), sodium silicate and a sulfuric acid solution are mixed to form hydrogel; (2) bentonite is soaked in a hydrochloric acid solution for activating treatment, and then filtration is performed to get a filter cake so as to prepare a modifier; (3) PMA (polymethyl acrylate), EVAL (ethylene-vinyl alcohol copolymer), a complex shown in the formula (I), limestone, dibutyl phthalate, hydrazine, sinigrin, diborane, glycerol, triallyl cyanurate, 2-benzothiazolethiol, the hydrogel and the modifier are mixed, cooled and shaped to prepare the PMA-EVAL high-strength cable sealing sheath. The PMA-EVAL high-strength cable sealing sheath prepared through the method has excellent mechanical properties, corrosion resistance and pressure resistance.

Description

technical field [0001] The invention relates to a cable sealing sheath, in particular to a preparation method of a PMA-EVAL high-strength cable sealing sheath. 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. The cable is mainly composed of the following 4 parts: ① Conductive wire core, made of high conductivity material (copper or aluminum). ②Insulation layer, the insulation material used for cables should have high insulation resistance, high breakdown electric field strength, low dielectric loss and low dielectric constant. Commonly used insulating materials in cables are oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber, etc. ③Seal the sheath to protect the insulated wire core from mechanical damage, moisture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08L23/08C08K13/02C08K3/34C08K5/3477C08K5/053H01B7/17
CPCC08L33/08C08L2203/20H01B7/17C08L23/0861C08K13/02C08K3/34C08K5/3477C08K3/346C08K5/053
Inventor 张小伟王徐惠何想想朱文玲
Owner WUHU HANGTIAN SPECIAL CABLE FACTORY
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