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High-temperature resistant wire: Classification and characteristics of mica tape for fire-resistant cables

Views:0     Author:Site Editor     Publish Time: 2021-12-14      Origin:Site

Refractory mica tape  Refractory mica tape is abbreviated as mica tape, which is a refractory insulating material.

According to the purpose, it can be divided into: fire-resistant mica tape for motors and fire-resistant mica tape for fire-resistant cables.

According to the structure, it is divided into: double-sided tape, single-sided tape, three-in-one tape, double film tape, single film tape, etc.

According to mica, it can be divided into: synthetic mica tape, phlogopite tape, and muscovite tape.  

Performance at room temperature: synthetic mica tape is the best, muscovite tape is second, and phlogopite tape is inferior. Insulation performance at high temperature: synthetic mica tape is the best, phlogopite tape is second, and muscovite tape is poor.

High temperature resistance: synthetic mica tape with fluorophlogopite tape, without crystal water, melting point 1375℃, large safety margin, best high temperature resistance, phlogopite releases crystal water above 800℃, followed by high temperature resistance, white cloud The mother releases crystal water at 600°C, and its high temperature resistance is poor. Fire-resistant mica tape for fire-resistant cables    Fire-resistant mica tape for fire-resistant cables is a high-performance mica insulation product with excellent high temperature resistance and combustion resistance. The powder mica tape has good flexibility under normal conditions and is suitable for the main fire-resistant insulation layer in various fire-resistant cables. There is basically no volatilization of harmful smoke when exposed to an open flame, so this product is not only effective for cables, but also very safe.

1. Synthetic mica refractory mica tape

   Synthetic mica is an artificial mica with large size and complete crystal form synthesized under normal pressure conditions by replacing hydroxyl with fluoride ion. Synthetic mica tape is made by using mica paper made of synthetic mica as the main material, and then pasting glass cloth on one or both sides with an adhesive. The glass cloth pasted on one side of the mica paper is called "single-sided tape", and the paste on both sides is called "double-sided tape". In the manufacturing process, several structural layers are glued together, then dried in an oven, then rolled, and then cut into tapes of different specifications. Synthetic mica tape has the characteristics of natural mica tape, namely: small expansion coefficient, high dielectric strength, high resistivity and uniform dielectric constant. Its main feature is high heat resistance level, which can reach Class A fire resistance level (950-1000 ℃)

  The temperature resistance of synthetic refractory mica tape is greater than 1000℃, the thickness range is 0.08~0.15mm, and the maximum supply width is 920mm.

  A. Double-sided synthetic fire-resistant mica tape: The synthetic mica paper is used as the base material, glass fiber cloth is used as the double-sided reinforcing material, and it is bonded with a silicone resin adhesive. It is the most ideal material for the manufacture of fire-resistant wires and cables. It has the best fire resistance and is recommended for key projects.

  B. Single-sided synthetic fire-resistant mica tape: Using synthetic mica paper as the base material and glass fiber cloth as a single-sided reinforcing material, it is the most ideal material for the manufacture of fire-resistant wires and cables. It has good fire resistance and is recommended for key projects.

2. Phlogopite refractory mica tape

   phlogopite fire-resistant mica tape has good fire resistance, acid and alkali resistance, corona resistance, and radiation resistance. It also has good flexibility and tensile strength, and is suitable for high-speed winding. Fire resistance experiments show that: the wire and cable wrapped with phlogopite tape can guarantee no breakdown for 90 minutes at a temperature of 840°C and a voltage of 1000V.

Phlogopite fiberglass fire-resistant tape is widely used in high-rise buildings, underground railways, large power stations and important industrial and mining enterprises and other places related to fire safety and fire rescue, for example, power supply lines and control lines of emergency facilities such as fire fighting equipment and emergency guide lights . Because of its low price, it is the material of choice for fire-resistant cables.

  A. Double-sided phlogopite fire-resistant mica tape: Using phlogopite paper as the base material, glass fiber cloth is used as the double-sided reinforcing material, and it is mainly used as a fire-resistant insulation layer between the core wire and the outer sheath of the fire-resistant cable. The fire resistance is better, and it is recommended for general engineering use.

  B. Single-sided phlogopite refractory mica tape:  Using phlogopite paper as the base material and glass fiber cloth as a single-sided reinforcing material, it is mainly used as a refractory insulation layer for fire-resistant cables. The fire resistance is better, and it is recommended for general engineering use.

  C. Three-in-one phlogopite fire-resistant mica tape: Using phlogopite paper as the base material, glass fiber cloth and carbon-free film are used as single-sided reinforcing materials, which are mainly used for fire-resistant cables as fire-resistant insulation layers. The fire resistance is better, and it is recommended for general engineering use.

  D. Double-film phlogopite tape: Take phlogopite paper as the base material, and use plastic film as double-sided reinforcement. It is mainly used for motor insulation. The fire-resistant performance is poor, and the use of fire-resistant cables is strictly prohibited.  

E. Single-film phlogopite tape: Use phlogopite paper as the base material, and use plastic film for single-sided reinforcement, which is mainly used for motor insulation. The fire-resistant performance is poor, and the use of fire-resistant cables is strictly prohibited.

Yangzhou Fongming Cable Factory, a mid-to-high-end mica wire manufacturer, pays attention to the world situation and hot spots in the world.

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