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Preparation method of silicone rubber electromagnetic shielding composite material with three-layer structure

An electromagnetic shielding and composite material technology, which is applied in the fields of magnetic field/electric field shielding, rubber layered products, chemical instruments and methods, etc., can solve the problems of complex preparation process, large amount of chemical solvents, and high cost, and achieves simple process and simple preparation method. Effective, cost-saving effect

Inactive Publication Date: 2022-03-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is complex, requires the use of a large amount of chemical solvents, and the cost is high

Method used

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  • Preparation method of silicone rubber electromagnetic shielding composite material with three-layer structure
  • Preparation method of silicone rubber electromagnetic shielding composite material with three-layer structure

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preparation example Construction

[0022] A kind of silicone rubber electromagnetic shielding composite material with three-layer structure and preparation method thereof of the present invention, specifically comprise the following steps:

[0023] A magnetic shielding composite comprising the steps of:

[0024] Step 1, mix 100 parts by weight of raw silicone rubber (MVQ) with 3-10 parts by weight of 2,5-dimethyl-2,5-bis-hexane (DBPH), 3-7 parts by weight of zinc oxide, 3-5 parts by weight of stearic acid and 30-80 parts by weight of white carbon black (WCB) are fully mixed in an internal mixer to obtain a mixed rubber;

[0025] Step 2, use the open mill to roll the mixed rubber to discharge the air bubbles in the mixed rubber, divide the mixed rubber into 60-80g according to the mass, and cut it into 9cm×13cm sheets, put the sheets on the plastic wrap Upper spare, marked as insulating layer;

[0026] Step 3, mix 100 parts by weight of silicone rubber (MVQ) raw rubber MVQ with 3-10 parts by weight of 2,5-dime...

Embodiment 1

[0032] 100 mass parts of MVQ raw rubber, 3 mass parts of DBPH, 3 mass parts of zinc oxide, 3 mass parts of stearic acid, and 30 mass parts of WCB are placed in the internal mixer, and the roller speed is adjusted to 30r / min mixing for 35 minutes; use the open mill to press the mixing rubber roller to discharge the air bubbles in the mixing rubber, cut it into a 9cm×13cm sheet with a mass of 60g, put the sheet on a plastic wrap for later use, and mark it as insulation Floor. Put 100 parts by mass of MVQ raw rubber, 3 parts by mass of DBPH, 3 parts by mass of zinc oxide, 3 parts by mass of stearic acid, 20 parts by mass of CB, and 1 part by mass of GR in an internal mixer, and roll the Adjust the speed to 30r / min and knead for 35min; use the open mill to press the mixed rubber roller to discharge the air bubbles in the mixed rubber, cut it into a 9cm×13cm sheet with a mass of 50g, and mark the sheet as a conductive layer ;Lay the sheets according to the order of conductive lay...

Embodiment 2

[0034] 100 mass parts of MVQ raw rubber, 6 mass parts of DBPH, 5 mass parts of zinc oxide, 4 mass parts of stearic acid, and 50 mass parts of WCB are placed in the mixer, and the roller speed is adjusted to 30r / min mixing 35min. Use an open mill to roll the mixed rubber to discharge the air bubbles in the mixed rubber, cut it into a 9cm×13cm sheet with a mass of 80g, put the sheet on a plastic wrap and mark it as an insulating layer. Put 100 parts by mass of MVQ raw rubber, 5 parts by mass of DBPH, 5 parts by mass of zinc oxide, 4 parts by mass of stearic acid, 45 parts by mass of CB, and 5 parts by mass of GR in a mixer, and roll the Adjust the speed to 30r / min and knead for 35min. Use an open mill to roll the mixed rubber to discharge the air bubbles in the mixed rubber, cut it into a 9cm×13cm sheet with a mass of 50g, and mark the sheet as a conductive layer. Laminate the sheets sequentially according to the conductive layer-insulating layer-conductive layer, and roll th...

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Abstract

A preparation method of a silicone rubber electromagnetic shielding composite material with a three-layer structure comprises the following steps: adding raw silicone rubber, 2, 5-dimethyl-2, 5-dihexane, zinc oxide, stearic acid and white carbon black into an internal mixer, uniformly mixing the raw silicone rubber, the 2, 5-dimethyl-2, 5-dihexane, the zinc oxide, the stearic acid and the white carbon black in the internal mixer, and internally mixing the obtained rubber compound to obtain MVQ rubber compound; discharging bubbles in the rubber compound by using an open mill, cutting the rubber compound into sheets, placing the sheets on a preservative film for later use, and marking the sheets as an insulating layer; adding the silicone rubber, the conductive filler, the cross-linking agent and the auxiliary sulfurizing agent into an internal mixer for internal mixing to obtain an MVQ rubber compound; discharging bubbles in the rubber compound by using an open mill, cutting the rubber compound into sheets, and marking the sheets as conductive layers; the conducting layer, the insulating layer and the conducting layer of all the sheets are attached in sequence; the attached sheet material is rolled and pressed; and performing high-temperature hot-pressing curing on the laminated sheets to obtain the efficient silicone rubber electromagnetic shielding composite material with a three-layer structure. The composite material has the characteristics of adjustability, easiness in processing, low filling and high electromagnetic shielding performance.

Description

technical field [0001] The invention belongs to the technical field of polymer-based electromagnetic shielding composite materials, and in particular relates to a preparation method of a silicon rubber electromagnetic shielding composite material with a three-layer structure. Background technique [0002] Methyl vinyl silicone rubber is an organic group rubber whose main chain is alternately formed by silicon-oxygen bonds. The highly saturated main chain structure endows silicone rubber with excellent chemical resistance, such as a wide temperature range and corrosion resistance. Ability and excellent anti-ultraviolet and anti-ozone properties, etc., because of its low toxicity, good thermal oxidation and mechanical stability, it is a kind of silicone rubber base commonly used in industrial preparation. [0003] With the increasing development of modern technology, high-frequency electromagnetic waves and electronic products can bring great convenience to people's lives, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B32B25/04B32B25/20B32B33/00C08L83/07C08K5/14C08K3/22C08K5/09C08K7/26C08J5/18C08K3/04B29C43/24B29C69/00
CPCH05K9/0081B32B25/042B32B25/20B32B33/00C08J5/18B29C43/24B29C69/00C08J2383/07C08K5/14C08K2003/2296C08K5/09C08K7/26C08K3/04C08K3/042C08K2201/001B32B2307/212B32B2307/558B32B2307/206B32B2307/202B32B2250/248
Inventor 邵亮张涛黎星马建中张梦辉姬占有
Owner SHAANXI UNIV OF SCI & TECH
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