The commonly used glue in mica tape is silicone pressure-sensitive adhesive. Especially in the manufacture of fire-resistant mica tape, silicone pressure-sensitive adhesive has become an ideal adhesive choice due to its excellent performance. The following is a specific analysis:

Mica tape is a composite material made by bonding mica paper and glass fiber cloth and other materials with adhesives. It is widely used in the field of electrical insulation, such as the insulation layer of fire-resistant cables. In the manufacturing process of mica tape, the choice of adhesive is crucial, and it needs to meet the following requirements:

Excellent bonding strength: ensure that mica paper and glass fiber cloth are firmly bonded and not easy to delaminate.
Good flexibility: adapt to the bending and deformation of mica tape during processing and use.
High temperature resistance: maintain stable performance in high temperature environment, no softening, no failure.
Low residual carbon: after combustion, white powdery silicon dioxide (SiO₂) is generated, which has good electrical insulation properties and meets fire resistance requirements.
Electrical insulation performance: prevent current leakage and ensure electrical safety.
Silicone pressure-sensitive adhesive meets the above requirements, and its characteristics include:
Excellent temperature resistance: It can maintain stable performance in both high and low temperature environments, and is not easy to soften, deform or fail. For example, it can still maintain good bonding strength and flexibility in the temperature range of -50℃ to 260℃.
Good electrical insulation performance: It can effectively isolate current, prevent short circuit and leakage, and is suitable for the field of electrical insulation.
Low residual carbon: After combustion, it generates white powdery SiO₂, which has good electrical insulation performance and meets the requirements of refractory mica tape.
Excellent aging resistance: It can resist the erosion of environmental factors such as ultraviolet rays and ozone, and has a long service life.
Good adhesion performance: It has good adhesion to a variety of materials (including low surface energy materials), ensuring the firm bonding of mica paper and glass fiber cloth.

Due to these excellent properties of silicone pressure-sensitive adhesive, it is widely used in the manufacture of refractory mica tape. For example, in the production process of fire-resistant mica tape, silicone pressure-sensitive adhesive is used as an adhesive to bond mica paper and glass fiber cloth together to form a composite material with excellent fire resistance and electrical insulation properties.