What is adhesive-backed copper foil?

Copper foil with adhesive backing: there are two types of copper foil: bare copper and adhesive backing, with a layer of mylar tape covering the surface of the copper foil for the adhesive backing, and vice versa for bare copper; divided into inner copper and outer copper by the different positions in the transformer. Bare copper is generally used for the outer copper of the transformer. Backing copper foil in the transformer generally plays a shielding role, mainly to reduce leakage inductance, and excitation current, in the wind through the current is too high, instead of copper wire, plays the role of conductor.

1. The test conditions for adhesive-backed copper foil are 25℃ at room temperature and 65℃ relative humidity below the results tested by ASTMD-1000.
2. The copper foil is mainly used to eliminate electromagnetic interference EMI and isolate the harm of electromagnetic waves to the human body, mainly used in computer peripheral cables, computer monitors, and transformer manufacturers.
3. Please keep the room dry and ventilated when storing the copper foil.
4. The adhesive-backed copper foil is divided into single-sided adhesive and double-sided adhesive. Single-sided adhesive-backed copper foil is also divided into single-conductor adhesive-backed copper foil and double-conductor adhesive-backed copper foil, single-conductor adhesive backed copper foil means that the adhesive-backed surface is not conductive, only the other side of the copper is conductive, so-called single-conductor that is single-sided conductive; double-conductor adhesive backed copper foil means that the adhesive-backed surface is conductive, and the other side of the copper itself is also conductive, so-called double-conductor that is double-sided conductive. There is also double-sided adhesive-backed copper foil used to process other materials into more expensive composite materials, the adhesive side of the double-sided adhesive-backed copper foil is also divided into two kinds conductive and non-conductive. Customers can choose according to their needs for conductivity.

• The coefficient of expansion of the insulation layer material is close to that of the copper conductor.
• The backing copper foil of good conductivity, thermal conductivity, and heat dissipation properties of the copper tape.
• High short-circuit strength (high melting point of copper).
• Minimal stress is added to the insulating layer material (pure copper is easy to bend and process).
• High material utilization rate.
• easy welding.
• When winding the coil, the insulator and copper tape are wound simultaneously for easy operation, less time, and high efficiency

1. Pure copper foil: has a conductive, shielding role.
2. Single-conducting copper foil: conductive (non-conductive on the adhesive side), shielding, and laminating.
3. Double-conducting copper foil: with conductive (adhesive side conductive), shielding, laminating, and fixing role.
4. Self-adhesive copper foil mylar: coated with self-adhesive adhesive on the copper foil surface (adhesive surface is not conductive) to play a shielding, insulating role.
5. Conductive copper foil mylar: in the copper foil surface coated with a conductive adhesive (adhesive surface conductive) to play a shielding, insulating, conductive role.
6. Backing copper foil: copper foil laminated mylar tape, insulation, conductive, shielding role, can be soldered.