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Preparation method of polyacrylamide compound type water-blocking yarn

A technology of polyacrylamide and composites, which is applied in the field of power cables, can solve the problems of low tensile strength, poor temperature resistance of water-blocking yarn, and easy breakage, achieve good tensile strength and thermal stability, and improve comprehensive performance. Good water absorption performance and longitudinal water blocking effect

Inactive Publication Date: 2013-01-09
KUNSHAN FENFA INSULATING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional water-blocking yarn has poor temperature resistance and cannot adapt to the high-temperature production environment in the cable production process. It has low tensile strength and is easy to break, causing production accidents. The longitudinal water-blocking effect is not ideal, which affects the long-term stability of power cable transmission performance. sex can be dangerous

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Under the protection of inert gas, add 10kg of starch into water, stir and gelatinize at a constant temperature of 45°C for 35 minutes, and obtain starch gelatinization liquid;

[0016] (2) Weigh 30kg of acrylamide, 3g of N,N'-methylenebisacrylamide, 4g of ammonium cerium nitrate, and 25g of kaolin into the starch gelatinization solution, stir for 2 hours, and then add 30ml of 30% sodium hydroxide Solution, increase the system temperature to 95°C, stir and react, after the reaction is completed, the product is soaked in water, washed to make the pH value of the product 7, dehydrated with methanol, washed with ethanol, dried, ground and pulverized to obtain polyacrylamide composite powder;

[0017] (3) Dispersing the polyacrylamide composite powder into an aqueous solution, coating the aqueous solution on vinylon filaments, and drying at high temperature to obtain a polyacrylamide composite water-blocking yarn.

Embodiment 2

[0019] (1) Under the protection of inert gas, add 40kg of starch into water, stir and gelatinize at a constant temperature of 45°C for 35 minutes, and obtain starch gelatinization liquid;

[0020] (2) Weigh 120kg of acrylamide, 13g of N,N'-methylenebisacrylamide, 11g of ammonium cerium nitrate, and 100g of kaolin into the starch gelatinization solution, stir for 2 hours, and then add 120ml of 30% sodium hydroxide Solution, increase the system temperature to 95°C, stir and react, after the reaction is completed, the product is soaked in water, washed to make the pH value of the product 7, dehydrated with methanol, washed with ethanol, dried, ground and pulverized to obtain polyacrylamide composite powder;

[0021] (3) Dispersing the polyacrylamide composite powder into an aqueous solution, coating the aqueous solution on vinylon filaments, and drying at high temperature to obtain a polyacrylamide composite water-blocking yarn.

Embodiment 3

[0023] (1) Add 20kg of starch into water under the protection of inert gas, stir and gelatinize at a constant temperature of 45°C for 35 minutes to obtain starch gelatinization liquid;

[0024] (2) Weigh 60kg of acrylamide, 5g of N,N'-methylenebisacrylamide, 5g of ammonium cerium nitrate, and 55g of kaolin into the starch gelatinization solution, stir for 2 hours, and then add 60ml of 30% sodium hydroxide Solution, increase the system temperature to 95°C, stir and react, after the reaction is completed, the product is soaked in water, washed to make the pH value of the product 7, dehydrated with methanol, washed with ethanol, dried, ground and pulverized to obtain polyacrylamide composite powder;

[0025] (3) Dispersing the polyacrylamide composite powder into an aqueous solution, coating the aqueous solution on vinylon filaments, and drying at high temperature to obtain a polyacrylamide composite water-blocking yarn.

[0026] The preparation method of the polyacrylamide compo...

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Abstract

The invention discloses a preparation method of a polyacrylamide compound type water-blocking yarn. The preparation method comprises the following steps: stirring and pasting starch to obtain starch pasting liquid; adding acrylamide, N,N'-methylene diacrylamide, ammonium ceric nitrate and kaolin to the starch pasting liquid, and stirring; then adding a sodium hydroxide solution, and stirring to react, thus obtaining polyacrylamide compound powder after aftertreatment; and dispersing the polyacrylamide compound powder in a water solution, coating the water solution on a vinylon filament, and drying at high temperature to obtain the polyacrylamide compound type water-blocking yarn. The preparation method has the following beneficial effects: as a functional filler, the added kaolin improves the water absorbency, so that the obtained polyacrylamide compound type water-blocking yarn has good longitudinal water-blocking effect and good tensile strength and heat stability; and the method is simple in production process and stable in technical performance and can be widely applied.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a preparation method of a polyacrylamide composite water-blocking yarn. Background technique [0002] The water blocking of power cables is mainly divided into two types: radial water blocking and longitudinal water blocking. Generally, the radial water blocking of power cables mainly adopts polyethylene outer sheath, metal sheath or lead-plastic, aluminum-plastic composite longitudinal cladding. The longitudinal water blocking of power cables is much more complicated, and water blocking materials need to be filled in the gaps of stranded conductive cores. In the past, petroleum jelly was mainly used to fill the gaps, but it was eliminated due to the disadvantages of difficult joint construction and reduced electrical conductivity. As a new type of water-blocking material, water-blocking yarn has gradually become an alternative product after water-blocking paste and water-blocking tap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/21D06M11/79C08F251/00D06M101/24
Inventor 周巧芬
Owner KUNSHAN FENFA INSULATING MATERIALS
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