Glass fiber insulating sleeve
  • Air ProGlass fiber insulating sleeve
  • Air ProGlass fiber insulating sleeve
  • Air ProGlass fiber insulating sleeve
  • Air ProGlass fiber insulating sleeve
  • Air ProGlass fiber insulating sleeve

Glass fiber insulating sleeve

The glass fiber insulating sleeve is made of high-purity alkali-free glass fiber woven into a tube, and then the outer wall of the tube is coated with organic silica gel and then vulcanized.

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Product Description

Brief introduction of fiberglass insulating sleeve:

The glass fiber insulating sleeve is made of high-purity alkali-free glass fiber woven into a tube, and then the outer wall of the tube is coated with organic silica gel and then vulcanized.

Glass fiber insulating sleeve


The synthesis of special high temperature resistant materials for glass fiber insulating sleeves determines that high temperature sleeves have many other similar materials that are difficult to replace: high temperature resistance, thermal insulation, flame retardancy, electrical insulation, chemical stability, and weathering resistance. Performance, cold resistance, water resistance, oil resistance, ozone resistance, voltage resistance, arc resistance, corona resistance, etc., especially safety and environmental protection performance, is a substitute for other hazardous products.


1. Safety and environmental protection, protect the health of workers
The alkali-free glass fiber in the glass fiber insulation sleeve has the characteristics of strong tensile force, no wrinkle or break, resistance to vulcanization, smoke-free, halogen-free, non-toxic, non-flammable with pure oxygen, and good insulation. After curing with organic silicone, it will be strengthened. The safety and environmental protection performance effectively protects the human health of workers and reduces the incidence of occupational diseases. Unlike other products, which are extremely harmful to the human body and the environment.
2. Superior high temperature resistance
The organic silicon structure on the surface of the glass fiber insulating sleeve contains both "organic groups" and "inorganic structures". This special composition and molecular structure make it integrate the characteristics of organic substances and the functions of inorganic substances. Compared with other polymer materials, its outstanding performance is high temperature resistance. With silicon-oxygen (Si-O) as the main chain structure, the energy of C-C is 82.6 kcal/mole, and the energy of Si-O in organic silicon is 121 kcal/mole, so its thermal stability is high , Under high temperature (or radiation exposure), the chemistry of molecules will not break or decompose. Silicone is not only resistant to high temperature, but also resistant to low temperature, and can be used in a wide temperature range. Whether it is chemical properties or physical mechanical properties, the change with temperature is very small.
3. Splash-proof, multiple protection
In the smelting industry, the temperature of the medium in the electric furnace is extremely high, and it is easy to form high-temperature splash (the same is true in the electric welding industry). After cooling and solidification, slag is formed on the pipe or cable, which will harden the rubber on the outer layer of the pipe or cable. Ultimately embrittlement and crack. Furthermore, unprotected equipment and cables will be damaged. The glass fiber insulation sleeves coated with multiple silica gels can achieve multiple safety protections. The temperature resistance can be as high as 600 degrees Celsius. It can effectively block the high temperature melting of molten iron, molten copper, and molten aluminum. Splashing of objects to prevent damage to surrounding cables and equipment.
4. Thermal insulation, energy saving and consumption reduction, radiation resistance
In high-temperature workshops, many pipelines, valves or equipment have very high internal temperatures. If they are not covered with protective materials, it is easy to cause burns or heat loss. In particular, the glass fiber insulating sleeve has better thermal stability than other polymer materials, as well as radiation resistance and thermal insulation, preventing accidents, reducing energy consumption, and preventing the heat of the medium in the pipeline from being directly transferred to the surroundings. The environment makes the temperature of the workshop too high, saving the cost of cooling.
5. Anti-moisture, anti-oil, anti-climatic aging, anti-pollution, and prolong the service life of equipment
The glass fiber insulating sleeve has strong chemical stability, and the organic silicon does not react to oil, water, acid and alkali. It can be used for a long time without aging within 200 ℃, and the service life under natural environment can reach several decades. , Can greatly protect the pipelines, cables and equipment in these occasions, and greatly extend their service life.
6. Ozone resistance, voltage resistance, arc resistance and corona resistance
Because the outer surface of the glass fiber insulating sleeve is coated with organic silica gel, its main chain is -Si-O-, which exists, so it is not easy to be decomposed by ultraviolet light and ozone. High temperature bushings have good electrical insulation properties. Their dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best in insulating materials, and their electrical properties are affected by temperature and frequency. The impact is small. Therefore, they are a kind of stable electrical insulating materials, which are widely used in the electronics and electrical industries.
7. Flame retardant, reduce the incidence and spread of fire
If the pipeline conveys flammable or toxic media, it is easy to cause fire or casualties when leakage occurs; cables often burn due to local high temperatures; glass fiber insulation sleeves are woven with extremely high temperature resistant glass fibers, and the surface is silica gel Special raw materials such as appropriate flame retardants are added to make it have excellent flame retardancy. Even if a fire occurs, it can prevent the fire from spreading, and can still protect the internal pipelines from damage for a long time, providing sufficient time for the rescue of important information such as data and materials.

Application Scope of Fiberglass Insulating Sleeve:

Wire harness, hot runner, steel, smelting, shipbuilding and chemical industry and other high-temperature areas, industrial electronic wiring, coil wrapping, electromechanical matching, terminal connection, pipeline anti-corrosion, computer peripherals, electrical meters, power communications, heating area cables, fluids Pipelines, rolling mill cables, oil pipes, sawing edge cables, generator sets, electrical voltage equipment, oxygen sensors, large buildings, hydraulic systems, automobile wiring harnesses and exhaust pipes, etc.

Glass fiber insulating sleeve:

Characteristic items

Characteristic parameter

experiment method


Smooth surface, uniform thickness covered with silicone resin coating, weaving patterns are clearly visible


Continuous use temperature (℃)


UL standard test

Temperature resistance

200±2℃ 24h≥1/2 original voltage value

UL standard test

Heat aging

200℃, 12 hours, no cracks

The test temperature is 200℃, 24 hours. Take it out and put it at room temperature for testing. The average damage is not less than half of the failure voltage before aging, and there is no crack on the surface.

Cold bending

Test temperature -10℃, no cracks in 1 hour

Test temperature -10℃, 1 hour, rewind the test tube on the casing of this specification and rewind 6 times, the casing surface coating has no cracks or peeling phenomenon

Horizontal combustion


Burn with a flame of 1000±50Btu/ft, and put the horizontally placed casing in contact with the outer flame of the flame and burn for 15 seconds at a time, 2 times in a row, any one of the 2 tests spreads the flame cannot exceed 30 seconds and automatically extinguishes



UL1441 test

Volume resistivity (Ω.CM)

1014 Ωcm or more

UL1441 test

Hydrolytic stability

No sticky, no deformation, no softening

After putting the casing in the water for 24 hours, the surface of the casing will not be sticky, deformed, or soft


For each of our products, we will design a dedicated test equipment, and each product is an empirical test, not a random test

Product quality certification:

Our company adheres to the concept of continuous innovation and advancement with the times, combined with the development of the 5G era, and the development and manufacturing of supporting smart equipment related products. A core R&D team with more than 20 years of experience has established a quality inspection room and an engineering research and development room. The related quality detectors ensure the quality of the products, so that our company has a number of invention patents, interprets the craftsmanship spirit with our own actions, and has successively passed ISO9001 certification, TS16949, UL, SGS, and other certifications. The company insists on product research and development to drive market sales and market sales to drive enterprise development. Adhering to the four-in-one business philosophy of "integrity, quality, efficiency, and innovation", we will continue to serve domestic and foreign customers with high-quality products, reasonable prices, perfect after-sales services, and the principle of mutual benefit.

Service Introduction:

Pre-sales: Pre-sales will actively communicate with customers detailed information, customer needs, product parameters, quality standards, provide consultation, accept telephone orders and mail orders, provide a variety of convenience and financial services, etc.

In-sale: In-sale provides customers with solutions with the best performance-to-price ratio, proactively track contract signing, delivery of goods, and help customers solve problems.


1. Dissatisfaction caused by the quality of the product itself. We will help the customer to solve the problem as soon as possible within the agreed period.

2. If the product cannot be used normally due to man-made reasons. We explain the cause of the problem to the customer, indicating that this type of problem is beyond our responsibility, and then provide other solutions to the customer based on the customer's problem.


Q: Is it high temperature resistant? Will cracks occur after high temperature resistance?

A: The glass fiber insulating sleeve is woven with extremely high temperature resistant glass fiber, and the surface silica gel is added with special materials such as appropriate flame retardants to make it have excellent temperature resistance and long-term continuous use temperature range, -10℃~200℃, with or without cracks and cracks.

Q: What are your withstand voltage ratings?

A: Our conventional glass fiber insulating sleeves are divided into 4 kinds of withstand voltage grades for average voltage, DBN-1500V, DBN-2500V, DBN-4000V, DBN-7000V, DBN-10000V.

Q: Are your products flame retardant?

A: Our fiberglass insulating sleeve products are flame-retardant and meet the American UL testing standards.

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