Mica Tubes Used in Line-frequency Furnaces

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Product Description:

 1. Introductions:

Mica tube is made of mica paper with highperformance organic silicon resin. After heating and pressing, the mica plate can be made into rigid or flexible insulating plates. The mica content is about 90% and the organic silicon resin content is 10%.

 2. Main features of Mica Parts:

Rigid mica tubes are featured with high strength, good performance, less smoke, less odor etc.

3. Applications:

This series mica plates are used mainly in household appliances (toaster ovens, microwave ovens, warm air blowers, hair dryers, electric iron etc.), metallurgy (such as line-frequency furnaces, medium frequency furnaces, electric arc furnace, etc.), medical equipment and other industries, used as the heating support, lining plate and partition plate of the electric appliances described above.

Typical applications of mica heating elements are air heaters, enclosure systems, food service equipment, process and packaging equipment.

4. Technical Parameters:


Tolerance for mica tube

Internal diameter(mm)

Tolerance of ID(mm)

Tolerance of ID(mm)

<10< span="">



10 ~ 20



21 ~ 50



51 ~ 100



101 ~ 200



201 ~ 300



       Length: 10mm to 1000mm
       Internal diameter:8-300mm
       Density:1.6g/cm3 to 1.7g/cm3




We have organized several common questions for our clients,may help you sincerely

--------What is the use of mica parts?

Mica laminate and washers made of our own high quality mica plates are used for home appliances, electro-magnets, micro-sensitive control gear etc


---------Which type of mica parts we can produce?

1. Rigid mica parts or Flexible mica parts

2. Muscovite mica parts or phlogopite mica parts

3. Thin mica parts or thick mica parts

4. All the special sized mica parts need drawing.


----------what advantages of mica parts?

1. Good high voltage insulation materials

2. Do not easily break up

3. Easily produce special size



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Q:What is the DMD insulation material?
DMD insulation paper has good mechanical strength, dielectric properties and high heat resistance (B and F), is Y series motor stereotypes insulation material, can be used as small and medium-sized motor slot insulation, turn Insulation, liner insulation and transformer insulation. Part of the thickness of the product has been widely sold to Europe and the United States and Southeast Asia market.
Q:What insulating materials do you need for power tools?
Insulation system of power tools can be divided into basic insulation, additional insulation, reinforced insulation, double insulation. Basic insulation: enameled wire and iron core between the insulating paper (paper for the green paper or DMD insulation paper) is the basic insulation, Withstand voltage is 1250V;
Q:What insulating material is used for high voltage cables
YJLV23 Aluminum core XLPE insulated steel tape armored PVC sheathed power cable YJV32 copper core XLPE insulated fine steel wire armored PVC sheathed power cable indoor, tunnel, cable trench, shaft or buried
Q:The role and definition of insulating materials
Electrical strength is the breakdown of the voltage between the voltage and the two electrodes subjected to the applied voltage under the specified conditions, that is, the breakdown voltage per unit thickness. For insulating materials, the general breakdown voltage, electrical strength of the value of the higher the better. 4, tensile strength: in the tensile test, the sample to withstand the maximum tensile stress. It is the most widely used and tested test of the mechanical properties of insulating materials. 5, Flammability: refers to the insulation material in contact with the flame to resist combustion or leave the flame to prevent the ability to continue to burn. With the increasing use of insulating materials, its flammability requirements are more important, people through various means to improve and improve the insulation
Q:What insulating material is best `?
According to their polarity is divided into weak polarity, non-polarity, polarity and strong polarity 4. According to the material source is divided into mineral insulating oil, synthetic insulating oil and vegetable oil 3. Mineral insulating oil referred to as mineral oil, The relative dielectric constant is about 2.2, and the breakdown voltage in the standard electrode is 35 to 50 kV (kV). The flash point is 125 to 135 ° C for the manufacture of transformers and cables , Capacitors, etc. Synthetic insulating oil is a synthetic liquid insulating material.As the mineral oil is a mixture of various hydrocarbons, it is difficult to remove the components of the insulation performance, and the preparation process is complex, easy to burn, low heat resistance , The dielectric constant is not high, so the research and development of the excellent performance of the synthetic insulating oil. Now have used aromatic synthetic oil, silicone oil, ester oil, ether and sulfone synthetic oil, polybutylene, etc. Vegetable oil use Castor oil, soybean oil, rapeseed oil, etc. Castor oil is an excellent dip capacitor for pulse capacitors
Q:What are the electrical insulation materials
Insulation material is electrical insulation material. According to the national standard GB2900.5 provides the definition of insulating material is: "used to make the device in the electrical insulation of the material." That is, to prevent the current through the material. Its resistivity is very high, usually in the range of 10 ^ 9 ~ 10 ^ 22Ω · m. As in the motor, the insulating material around the conductor isolates the turns and isolates it from the grounded stator core to ensure safe operation of the motor.
Q:What is the difference between insulation and pressure?
Insulation test Because the test voltage is low, it is not easy to damage the equipment under test. The voltage test is easy to damage the equipment under pressure when the test voltage is high. In some cases, although the withstand voltage test is passed, Causing damage, the test staff will have to use low-voltage insulation test, test the pressure test after the test equipment insulation. Under normal circumstances, insulation resistance qualified, withstand voltage test will be adopted.
Q:What insulating materials are used for transformers
Some of the transformer plants in the United States, such as FPT in Virginia, have developed a NOMEX® Aromatic Polyamide using DuPont as a primary insulated dry-type transformer. FPT products are available in two models: FB type 180 ℃ (H level) of the insulation system. FH type 220 ℃ (C level) of the insulation system, the coil temperature rise were 115K (China 125K) and 150K. Its low-voltage coil is foil-type or multi-layer and laminated, and NOMEX® is used for both turn insulation and interlayer insulation. The high-pressure coil is a cake, and the wire is wrapped in NOMEX® paper. The barcakes do not have a conventional stay and a pad, and the comb is used to reduce the maximum voltage of the cake by half. The high-voltage coil of the axial short-circuit resistance, but increased the coil winding system and manufacturing time. High and low voltage coil for nesting, enhanced mechanical strength.
Q:What are the commonly used insulating materials?
Mainly used for motor, electrical winding insulation, switch the bottom plate and insulators, etc. Organic insulation materials are: shellac, resin, rubber, cotton yarn, paper, linen, rayon,
Q:What is the main purpose of insulating materials?
Insulation withstand voltage: the higher the voltage applied across the insulator, the greater the electric field force received by the material, the more prone to ionization collision, resulting in insulator breakdown. The lowest voltage breakdown of the insulator is called the breakdown of this insulator Voltage. 1 mm thick insulation material breakdown, the need to add the voltage kV is called insulation material insulation voltage strength, referred to as the dielectric strength

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