Ceramifiable silicon rubber composite belt

A silicone rubber and composite tape technology, applied in ceramics, conductors, insulated cables, etc., can solve the problems of brittleness, limited manufacturing length, hard and unbendable cables, etc., to achieve high strength, good flexibility, good electrical properties and The effect of mechanical strength

Active Publication Date: 2013-08-07
广东安迪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

Although mineral insulated fireproof cables have good fire resistance, their manufacturing process is complicated, the production cost is high, the length of production is limited, and the cables are very hard and cannot be bent, the joints are complicated, the construction is very difficult, and it is difficult to be widely used
Although the mica tape wrapping refractory cable has a simple process and unlimited manufacturing length, there is a common disadvantage of the mica tape. After high temperature combustion, the mechanical strength of the mica tape is greatly reduced and becomes brittle. It is easy to pulverize and fall off after being subjected to severe vibration,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Preparation of high-strength silicone compound

[0016] Weigh out 120 g of vinyl-terminated methyl vinyl silicone rubber with a vinyl content of 0.28% (mass) and a molecular weight of 700,000, and 265 g of methyl vinyl silicone rubber with a vinyl content of 0.06% (mass) and a molecular weight of 800,000. 215 g of methyl vinyl silicone rubber with a vinyl content of 0.50% (mass) and a molecular weight of 600,000, 30 g of hydrogen-containing silicone oil with a hydrogen content of 0.1% (mass) and a viscosity of 100 mPa·s, and 96 g of fumed silica in the kneader After kneading the dough, add 100g of gas phase white carbon in three times. After all the dough is mixed into a dough, the temperature is increased to 90°C and the kneading is continued for 2.5 hours, and then the temperature is increased to 150°C to vacuum (vacuum degree 0.08-0.09MPa). Mix for 0.5 hours, take out and cool naturally to obtain high-strength silicone rubber compound.

[0017] The high-strength silicon...

example 2

[0019] Preparation of composite ceramic powder

[0020] Weigh 412g of silicon carbide, 136g of alumina, 120g of zirconia, 70g of boron oxide, and 276g of nano-montmorillonite, place them in a high-speed mixer, stir for 0.5h, mix uniformly, and then grind in a ball mill for 1h to obtain composite ceramic powder.

example 3

[0022] Treatment of glass cloth

[0023] Weigh 110g of silicone-acrylic emulsion with a silicon content of 8% (mass) and a solid content of 45% (mass), dilute with 890g of water, and treat the glass cloth with the diluted silicone-acrylic emulsion by dipping, and then place it in a drying tunnel for 80 Bake at ℃ for 8min.

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Abstract

The invention belongs to the technical field of a heat-conducting interface material, and discloses a ceramifiable silicon rubber composite belt, which comprises a glass cloth reinforcing layer and a silicon rubber layer, wherein the silicon rubber layer is prepared from a ceramifiable silicon rubber composition; the ceramifiable silicon rubber composition comprises organosilicon rubber compound and composite ceramic powder; the weight ratio of the organosilicon rubber compound to the composite ceramic powder is 1:1-1.2; the organosilicon rubber compound comprises vinyl terminated methyl vinyl silicon rubber, methyl vinyl silicon rubber, hydrogen containing silicone oil and fumed silica with different vinyl contents; and the composite ceramic powder comprises silicon carbide, alumina, zirconia, boron oxide and montmorillonite. The ceramifiable silicon rubber composite belt has extremely high strength and good flexibility and can be used for manufacturing a fire-resistant cable in place of a mica tape; and after a cable lapped by using the ceramifiable silicon rubber composite belt is ablated for 180 minutes in flame of 650-950 DEG C, the cable can still work normally.

Description

technical field [0001] The invention relates to an insulating material for cables, in particular to a wrapping insulating material for fire-resistant cables that can be vitrified under flame conditions to form a hard protective layer. Background technique [0002] In recent years, fire accidents in public places have occurred frequently in my country. According to relevant data, since the beginning of the 21st century, there have been about 909,000 fires in my country, 10,059 people died, and the direct economic loss was about 6.03 billion yuan. The number of fire accidents in public places has exceeded It accounts for more than 50% of the total number of fire accidents in the country. When a fire accident occurs in a public place, the safety and smoothness of the cable is very important for fire prevention and fire fighting. It can not only win the precious rescue time to the maximum extent, but also greatly reduce the casualties and property losses. Fire-resistant cables r...

Claims

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Application Information

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IPC IPC(8): H01B3/12H01B7/295H01B7/18
Inventor 丁小卫陈小丹许家琳唐建振
Owner 广东安迪新材料科技有限公司
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