Different Types of Tape Used in High Frequency Transformer

Label:High Frequency Transformer, Mara Tape, Margin Tape, Copper Foil Tape, Polyimide Tape

Sep 1, 202210920

Different Types of Tape Used in High Frequency Transformer

Hi guys, glad to see you here again! In previous JRPanel videos, you must have found that the high frequency transformer is always wapped in yellow tape.


In this blog, JRPanel would like to introduce you the different types of tape used in High Frequency Transformer.

1. Mara Tape


Mara tape, also known as polyester tape, uses polyester film as the base material and the adhesive is acrylic flame retardant adhesive.

This kind of tape has excellent resistance to chemicals and moisture, and can resist cuts and abrasions. Because of its flame retardant and insulating characteristics, mara tape is often used as insulation between windings of high and low frequency transformers and as a core fixing material for transformers.

There are many colors of Mara Tape, usually red, blue, yellow, white, etc. It has certain elasticity and stretchability, and one side is coated with adhesive.

It is widely used in transformers, motors, capacitors and other types of electronic components for insulation wrapping, and can also be used for high-voltage isolation in the switching power supply.


2. Margin Tape


Margin tape, also known as non-woven tape, is made by bonding a non-woven fabric to a polyester film substrate and coating one side of the non-woven fabric with an acrylic adhesive with excellent performance.


Margin tape is mainly used for insulation of uninterruptible power supplies, dry-type transformers, high temperature industrial frequency transformers, high temperature gaskets and microwave oven transformers.


3. Polyimide Tape


Polyimide tape, which is based on polyimide film with imported silicone pressure-sensitive adhesive, is resistant to high and low temperatures, acids and alkalis, solvents, electrical insulation (class H), and radiation.


In the electronic and electrical industry, it can be used for H-class motor and transformer coil insulation wrapping, high temperature resistant coil end fixing, temperature measuring RTD protection, capacitor and wire wrapping and other bonding insulation under high temperature working conditions.

In the circuit board manufacturing industry, it can be used for electronic protection paste, especially for SMT temperature resistance protection, PCB gold finger protection, electronic transformers and other high temperature and moisture protection.


4. Copper Foil Tape

Copper foil tape, a metal tape, is mainly used for electromagnetic shielding applications.


It has strong adhesion and good electrical conductivity, and can be easily wrapped and attached to the wire, and can be cut to various specifications according to customer requirements.

Its purity is higher than 99.95%, eliminating electromagnetic interference (EMI), isolating the harm of electromagnetic waves to human body, and avoiding unwanted voltage and current.

In addition, this type of tape has a good effect for static discharge after grounding. It is generally applied to transformers, cell phones, computers, PDAs, PDPs, LED screens and other various electronic products where electromagnetic shielding is required.


If you are still confused about High Frequency Transformer, please do not hesitate to contact us !




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