Insulating silicone gasket and preparation method and equipment thereof

A technology of insulating silica gel and gasket, applied in chemical instruments and methods, lamination, coating, etc., can solve the problems of inability to meet the heat dissipation requirements of electronic equipment, structural damage, and inability to form, achieving good thermal conductivity and high production efficiency , The effect of convenient processing and molding

Pending Publication Date: 2018-11-23
东莞市博恩复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing thermal conductive materials for insulating silicone gaskets usually use alumina as thermal conductive filler. When the thickness is less than 0.5mm and the breakdown voltage is greater than 3KV, the thermal conductivity is usually lower than 2W/m*K, which cannot meet the hea

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  • Insulating silicone gasket and preparation method and equipment thereof
  • Insulating silicone gasket and preparation method and equipment thereof
  • Insulating silicone gasket and preparation method and equipment thereof

Examples

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preparation example Construction

[0025] The preparation method of the insulating silicone rubber gasket is as follows: first dissolve the silicone rubber in a solvent, stir evenly, add boron nitride and other thermally conductive powders, vulcanizing agents and coupling agents, stir evenly and then stand for 1 to 3 hours. Get thermally conductive silica gel. The stirred thermally conductive silica gel is then coated on the release film by the coating device 30, wherein the thickness of the coated thermally conductive silica gel is controlled by a doctor blade. Then the thermal silica gel is combined with the alkali-free glass fiber cloth in the middle, and it is dried at a temperature of 60~80℃ for 3-8 minutes, and then the thermal silica gel is coated on the alkali-free glass fiber cloth and placed at a temperature of 60~80℃ After drying for 3-8 minutes, it is shaped to obtain a semi-finished product. The semi-finished product is cut into sheets, and then the surface is covered with a release film, and then ...

Embodiment 1

[0031] Put 5 kg of methyl vinyl silicone rubber in 10 kg of xylene solvent and stir for 2 hours to fully dissolve the silicone rubber, then add 0.1 kg of silane coupling agent A-151, 12 kg of boron nitride, 2 One kilogram of alumina and 0.1 kilogram of bis-tetradichlorobenzoyl peroxide (trade name bis-two-four) were stirred for 1 hour to make them uniform, and then stirred for 15 minutes to obtain thermally conductive silica gel. Let the thermally conductive silica gel stand for 1 hour, and apply the thermally conductive silica gel on the coating device 30 at the first coating head 32 on the PTFE fiberglass cloth with a width of 300 mm, and control the coating width to 200 mm , The thickness is 0.2 mm, and then the alkali-free glass fiber cloth with a thickness of 0.1 mm (commodity model 1080) is composited through the composite roller 34, and the composite alkali-free glass fiber is placed in the first drying equipment 35 at a temperature of 70 ℃ Dry in medium for 5 minutes. ...

Embodiment 2

[0034] Put 5 kg of methyl vinyl silicone rubber in 10 kg of xylene solvent and stir for 2 hours to fully dissolve the silicone rubber, then add 0.1 kg of silane coupling agent A-151, 15 kg of boron nitride, 2 One kilogram of magnesium oxide and 0.1 kilogram of bis-tetradichlorobenzoyl peroxide (trade name bis-two-four) were stirred for 1 hour to make them uniform, and then stirred for 15 minutes to obtain thermally conductive silica gel. Let the thermal silica gel stand for 1 hour, and coat the thermal silica gel on the PTFE glass cloth with a width of 400 mm at the first coating head 32 on the coating device 30, and control the coating width to 300 mm , The thickness is 0.3 mm, and then the alkali-free glass fiber cloth with a thickness of 0.05 mm (commodity model 104) is composited by the composite roller 34, and the composite alkali-free glass fiber is placed in the first drying equipment 35 at a temperature of 70 ℃ Dry in medium for 5 minutes. Then through the second coati...

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Abstract

The invention discloses an insulating silicone gasket. The insulating silicone gasket is composed of an upper thermal conductive adhesive layer, an intermediate alkali-free glass fiber cloth layer anda lower thermal conductive adhesive layer, wherein the upper and lower thermal conductive adhesive layers are composed of silicone rubber, boron nitride and an auxiliary agent, the thickness of the upper and lower thermal conductive adhesive layers is 0.02-0.4 mm respectively, and the thickness of the intermediate alkali-free glass fiber cloth layer is 0.01-0.2 mm. The invention also discloses apreparation method and equipment of the insulating silicone gasket. The insulating silicone gasket disclosed by the invention uses the boron nitride as a main filler, has an intermediate composite alkali-free glass fiber cloth layer and has a thickness of 0.1-0.5 mm; and when the breakdown voltage is greater than or equal to 3KV, the insulating silicone gasket has good heat conduction effect, highheat dissipation efficiency and no need of addition of a large amount of high heat conductive filler, the polymer structure of organosilicon cannot be damaged, so the insulating silicone gasket is convenient to process and mold. In addition, the insulating silicone gasket can be directly prepared by a two-stage double coating head coating device, is hot pressed by a molding machine, and has a simple structure and high production efficiency.

Description

【Technical Field】 [0001] The invention relates to an insulating silica gel material, in particular to an insulating silica gel gasket with high heat dissipation efficiency, easy forming, and applicable to thermal interface materials of electronic equipment, and a preparation method and equipment thereof. 【Background technique】 [0002] With the development of electronic information technology, electronic equipment is becoming more and more miniaturized, and electronic equipment will generate heat more or less during use. If the excess heat cannot be dissipated in time, it will not only affect the product performance of electronic equipment, but also Its service life is also seriously threatened. As a component of electronic equipment, insulating silicone gasket not only plays a role in insulation, but also requires a good heat dissipation effect. The existing insulating silicone gasket thermal conductive material usually uses alumina as the thermal conductive filler. When its th...

Claims

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Application Information

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IPC IPC(8): B32B17/02B32B17/06B32B17/10B32B27/12B32B27/36B32B7/06B32B37/10B32B37/06B32B38/16C08K13/02C08K3/38C08K3/22C08K3/24C08L83/07C08L83/05B29C69/02
CPCB29C69/02B32B5/02B32B7/06B32B17/067B32B17/10B32B27/12B32B27/36B32B37/06B32B37/10B32B38/164B32B2255/26B32B2262/101C08K3/22C08K3/38C08K13/02C08K2003/222C08K2003/2227C08K2003/385C08L83/04C08L2205/025C08K3/24
Inventor 刘治林唐正阳陆冬华
Owner 东莞市博恩复合材料有限公司
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