What is Polyimide Tape?
Polyimide tape is an adhesive tape that uses polyimide film as the tape base material.
Polyimide has excellent heat resistance and insulation properties due to its high thermal decomposition temperature. Its main applications are heat-resistant masking of electronic substrates and heat-resistant insulation.
Polyimide is a general term for polymers that are polymerized by imide bonds. The first industrial application of polyimide film was commercialized by DuPont of the United States, which used aromatic polyimide.
Many polyimide tape products use a silicone adhesive, which has the advantage of leaving no adhesive residue after removal.
Applications of Polyimide Tape
Polyimide tape is mainly used under high temperatures and high voltages due to the ultra-high and ultra-low temperature resistance of the polyimide film used as the base material. It can be applied in a variety of places, from repairing railroad and aircraft parts that require heat resistance to insulating circuits.
Many of them are thin and translucent, making them suitable for repairing small parts and fine electronic circuits. Since it is removable again, it can also be used in situations where repeated fine adjustments are required. Common uses include masking electronic circuits during soldering operations and insulating and insulating printed circuit boards.
In addition, since many products have high chemical resistance, they are often used for fixing when applying strong acidic chemicals or for protection during partial etching.
Polyimide Tape Principle
The majority of polyimide tapes consist of a polyimide film coated with a silicone adhesive. Some rubber-based adhesive products and acrylic adhesive products are also available for applications where silicone residue is to be prevented.
The characteristics of polyimide tape are due to the properties of the polyimide film and the adhesive. Polyimide has a higher heat resistance temperature than the adhesive, so the heat resistance temperature of the product is generally determined by the type of adhesive.
Properties of Polyimide
Polyimide is a general term for high-molecular compounds that are polymerized by imide bonds. Polyimide tape is made of aromatic polyimide, which is an aromatic compound polymerized by imide bonds. Because of the extremely strong bonding, polyimide tape has high strength and excellent heat resistance and insulation properties. The thermal decomposition temperature is 500°C or higher.