Views: 2 Author: Site Editor Publish Time: 2021-11-23 Origin: Site
Refractory mica tape Refractory mica tape is abbreviated as mica tape, which is a kind of 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 further 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 poor. Insulation performance at high temperature: synthetic mica tape is the best, phlogopite tape is second, and muscovite tape is inferior.
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 has poor high temperature resistance. 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 by replacing the hydroxyl group 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. In addition to the characteristics of natural mica tape, synthetic mica tape has the characteristics of small expansion coefficient, high dielectric strength, high resistivity and uniform dielectric constant. Its main feature is high heat resistance and can reach Class A fire resistance (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. The fire resistance is the best, and it is recommended for key projects.
B. Single-sided synthetic fire-resistant mica tape: The synthetic mica paper is used as the base material and glass fiber cloth is used 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, anti-corona, anti-radiation characteristics, and has good flexibility and tensile strength, 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 and glass fiber cloth as the double-sided reinforcing material, it is mainly used as a fire-resistant insulation layer between the core wire and the outer sheath of the fire-resistant cable. It has better fire resistance and 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. It has better fire resistance and 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. It has better fire resistance and is recommended for general engineering use.
D. Double film phlogopite tape: use phlogopite paper as the base material, and use plastic film as double-sided reinforcement, 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, mainly used for motor insulation. The fire-resistant performance is poor, and the use of fire-resistant cables is strictly prohibited.