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Preparation method for acrylonitrile copolymer type water blocking yarns

A technology of acrylonitrile and copolymer, which is applied in the field of preparation of acrylonitrile copolymer water-blocking yarn, which can solve the problems of long-term stability of power cable transmission performance, inability to adapt to high-temperature production environment, and unsatisfactory longitudinal water-blocking effect. Achieve good water blocking effect, good water absorption rate, and good longitudinal effect

Inactive Publication Date: 2013-01-02
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

[0014] (1) Add 50g of starch and 0.8g of sodium chloride into a mixed solution of 84ml of water and epichlorohydrin and stir, add dropwise 20ml of potassium hydroxide solution with a mass fraction of 10% and react, neutralize the reaction solution with hydrochloric acid, Filter, wash with water and absolute ethanol, and dry to obtain cross-linked starch;

[0015] (2) Add 6ml of ferrous sulfate solution with a mass fraction of 2%, 30ml of acrylonitrile and 5ml of hydrogen peroxide with a mass fraction of 6% in sequence to 150ml of aqueous solution containing 25g of cross-linked starch, and react at 35°C for 1 hour, Aftertreatment obtains powdery acrylonitrile copolymer;

[0016] (3) Dip synthetic fiber filaments in water dispersed with acrylonitrile copolymers, take them out and dry them to obtain acrylonitrile copolymer water-blocking yarns.

Embodiment 2

[0018] (1) Add 23g of starch and 0.5% sodium chloride into a mixed solution of 90ml of water and epichlorohydrin and stir, add dropwise 17ml of potassium hydroxide solution with a mass fraction of 10% and react, neutralize the reaction solution with hydrochloric acid, and filter , washed with water and absolute ethanol, and dried to obtain cross-linked starch;

[0019] (2) Add 6ml of ferrous sulfate solution with a mass fraction of 2%, 28ml of acrylonitrile and 4ml of hydrogen peroxide with a mass fraction of 6% to 150ml of aqueous solution containing 27g of cross-linked starch, and react at 40°C for 1.5 hours. Aftertreatment obtains powdery acrylonitrile copolymer;

[0020] (3) Dip synthetic fiber filaments in water dispersed with acrylonitrile copolymers, take them out and dry them to obtain acrylonitrile copolymer water-blocking yarns.

Embodiment 3

[0022] (1) Add 78g of starch and 1.5g of sodium chloride into a mixed solution of 134ml of water and epichlorohydrin and stir, add dropwise 32ml of potassium hydroxide solution with a mass fraction of 10% and react, neutralize the reaction solution with hydrochloric acid, Filter, wash with water and absolute ethanol, and dry to obtain cross-linked starch;

[0023] (2) Add 7ml of ferrous sulfate solution with a mass fraction of 2%, 33ml of acrylonitrile and 7ml of hydrogen peroxide with a mass fraction of 6% to 150ml of aqueous solution containing 27g of cross-linked starch, and react at 45°C for 2 hours. Aftertreatment obtains powdery acrylonitrile copolymer;

[0024] (3) Dip synthetic fiber filaments in water dispersed with acrylonitrile copolymers, take them out and dry them to obtain acrylonitrile copolymer water-blocking yarns.

[0025] According to the preparation method of the acrylonitrile copolymer water-blocking yarn disclosed in the present invention, the obtained a...

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Abstract

The invention discloses a preparation method for acrylonitrile copolymer type water blocking yarns. The preparation method comprises the following steps: adding starch and sodium chloride to a mixed solution of water and epichlorohydrin, stirring, adding a potassium hydroxide solution in a dropwise manner, carrying out a reaction, and carrying out a post-treatment to obtain cross-linked starch; sequentially adding a ferrous sulfate solution, acrylonitrile and hydrogen peroxide to the cross-linked starch aqueous solution, carrying out a heating reaction, and carrying out a post-treatment to obtain powdery acrylonitrile copolymer; impregnating synthetic fiber filaments in water in which the acrylonitrile copolymer is dispersed; and taking the obtained material, and drying to obtain the acrylonitrile copolymer type water blocking yarns. With the technical scheme, the invention provides the preparation method for the acrylonitrile copolymer type water blocking yarns, and the obtained acrylonitrile copolymer type water blocking yarns have the following characteristics that: a longitudinal water blocking effect is good; a high rate water absorption resin is firmly combined with the synthetic fiber filaments, such that powder shedding is not easily generated during use, no adhesion is generated, and a service life is long. In addition, the preparation method of the present invention has characteristics of simple production process, stable technology performance, strong practicability, and wide application.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a method for preparing an acrylonitrile copolymer water-blocking yarn. Background technique [0002] In the past ten years, with the rapid development of communication technology, the application field of power cables is also expanding. At the same time, the environmental requirements for power cables are constantly increasing, so the quality requirements for power cables are also increasing. Water-blocking yarn is a water-blocking material commonly used in the power cable industry. Its sealing, buffer protection, moisture-proof and waterproof functions have been widely recognized by people, and its performance and varieties have been continuously improved and improved with the development of power cables. Complete. [0003] The traditional water-blocking yarn is made of a blend of water-absorbing fiber and polyester fiber, and is finished by combing. However, the traditional water-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/31C08F251/00C08B31/00
Inventor 周巧芬
Owner KUNSHAN FENFA INSULATING MATERIALS
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