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Semi-conductive EVA (Ethylene Vinyl Acetate) master batch for shielding and production mode thereof

A semi-conductive and masterbatch technology, which is applied in the field of semiconductive EVA masterbatch for shielding and its production method, can solve the problems of high price, low mechanical properties, and general shielding effectiveness, so as to improve electrical strength, increase service life, and prevent partial The effect of discharge

Pending Publication Date: 2022-05-06
浙江祥丰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The semi-conductive shielding material prevents partial discharge by uniform electric field distribution in the insulating layer, thereby improving the electric strength of the cable and improving the service life of the cable. Early electromagnetic shielding technology mainly uses metal and its composite materials, which have good shielding properties. performance, but its mechanical properties are low, the anti-aging performance is average, the price is expensive, and the shielding effect is relatively average

Method used

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  • Semi-conductive EVA (Ethylene Vinyl Acetate) master batch for shielding and production mode thereof
  • Semi-conductive EVA (Ethylene Vinyl Acetate) master batch for shielding and production mode thereof

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preparation example Construction

[0061] A preparation method for shielding semiconductive EVA masterbatch, comprising the following steps:

[0062](1) Take by weight ethylene-vinyl acetate copolymer, conductive carbon black, modified EPDM rubber, zinc oxide, coupling agent, hydroxyapatite, dicumyl peroxide, chlorinated paraffin, Antioxidant, dispersant;

[0063] (2) Put ethylene-vinyl acetate copolymer, conductive carbon black, modified EPDM rubber, zinc oxide, coupling agent, hydroxyapatite, chlorinated paraffin, antioxidant, and dispersant in the dryer Carry out drying treatment, the drying temperature is 60°C, and the drying time is 1 hour to obtain dry materials;

[0064] (3) Add the dry material obtained above into a mixer to mix evenly, and then add it to a mixer for mixing to obtain a mixed material. The mixing temperature is 138° C. and the mixing time is 30 minutes;

[0065] (4) Add the mixed material and dicumyl peroxide to the internal mixer in sequence for internal mixing treatment, and then dis...

Embodiment 1

[0068] A semi-conductive EVA masterbatch for shielding, made of the following components in parts by weight: 70 parts of ethylene-vinyl acetate copolymer, 23 parts of conductive carbon black, 20 parts of modified EPDM rubber, 2 parts of zinc oxide, 1 part of coupling agent, 8 parts of hydroxyapatite, 1 part of dicumyl peroxide, 2 parts of chlorinated paraffin, 1.5 parts of antioxidant, 3 parts of dispersant.

[0069] The vinyl acetate content in the ethylene-vinyl acetate copolymer is 12%.

[0070] The preparation method of modified EPDM rubber is as follows:

[0071] (1) adding tetramethyl orthosilicate to the ethanol solution, stirring evenly to obtain a premix;

[0072] (2) Add graphene and kaolin successively to the mixer and carry out high-speed stirring and mixing to obtain a solid mixture;

[0073] (3) Add the fixed mixture obtained above to the premix, stir at a speed of 500r / min for 2 hours, and then perform ultrasonic dispersion treatment for 10min to obtain a disp...

Embodiment 2

[0095] A semi-conductive EVA masterbatch for shielding, made of the following components in parts by weight: 74 parts of ethylene-vinyl acetate copolymer, 24 parts of conductive carbon black, 22 parts of modified EPDM rubber, 3 parts of zinc oxide, 2 parts of coupling agent, 10 parts of hydroxyapatite, 1.5 parts of dicumyl peroxide, 3 parts of chlorinated paraffin, 2 parts of antioxidant, 4 parts of dispersant.

[0096] The vinyl acetate content in the ethylene-vinyl acetate copolymer is 12%.

[0097] The preparation method of modified EPDM rubber is as follows:

[0098] (1) adding tetramethyl orthosilicate to the ethanol solution, stirring evenly to obtain a premix;

[0099] (2) Add graphene and kaolin successively to the mixer and carry out high-speed stirring and mixing to obtain a solid mixture;

[0100] (3) Add the fixed mixture obtained above to the premix, stir at a speed of 500r / min for 2 hours, and then perform ultrasonic dispersion treatment for 10min to obtain a d...

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Abstract

The invention discloses a semi-conductive EVA (Ethylene Vinyl Acetate) master batch for shielding and a production mode thereof. Relates to the technical field of new material production, and is prepared from the following components: an ethylene-vinyl acetate copolymer, conductive carbon black, modified ethylene propylene diene monomer, zinc oxide, a coupling agent, hydroxyapatite, dicumyl peroxide, chlorinated paraffin, an antioxidant and a dispersant. The semi-conductive EVA master batch for shielding prepared by the invention can uniformize electric field distribution in a cable insulation layer, prevent partial discharge, improve the electrical strength of a cable and finally prolong the service life of the cable.

Description

technical field [0001] The invention belongs to the technical field of new material production, in particular to a semi-conductive EVA masterbatch for shielding and a production method thereof. Background technique [0002] With the development of information transmission integration, broadband, intelligence, and digitization, various lines in the integrated wiring system engineering of buildings and buildings are more and more concentratedly arranged together, and high-speed data streams are interfered by the same frequency electromagnetic interference. , Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) issues are becoming more and more obvious. [0003] The semi-conductive shielding material prevents partial discharge by uniform electric field distribution in the insulating layer, thereby improving the electric strength of the cable and improving the service life of the cable. Early electromagnetic shielding technology mainly uses metal and its co...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/16C08L91/06C08K3/22C08K3/04C08K3/34C08K9/02
CPCC08L23/0853C08K2201/001C08K2003/2296C08L2203/202C08L23/16C08L91/06C08K3/22C08K3/042C08K3/346C08K9/02
Inventor 盛文龙邹明
Owner 浙江祥丰新材料科技有限公司
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