Membrane envelope line, also known as Mela line. The insulation voltage of enamelled wire is increased by adding one or more layers of polyester film to the stranded wire. Electromagnetic wire is one of the main raw materials of motor. Winding: There are many kinds of winding or winding lines, which can be divided into round, flat and banded lines according to their cross section shapes. The breakdown voltage of spicy silk can be as high as 400~1000V. It is suitable for the special environment with high working frequency and loss of skin effect and adjacent effect of single strand conductor.

Add one or two layers of Merah film on LITZ wire or coated strand wire to improve the insulation voltage of wire and also play a shielding role. Can replace silk-covered wire. It can be used as the insulating sheath of wire, winding high frequency inductors, transformers, etc., which are used in frequency converter, communication equipment, ultrasonic equipment, sonar equipment, video equipment, radio equipment, thermal inductance equipment, etc. The development of electric appliances also promotes the development of enamelled wire varieties, the rise of frequency conversion motor promotes the development of special enamelled wire, induction ovens and microwave ovens promote the development of heat-resistant and self-adhesive enamelled wire, electric bicycles need self-adhesive enamelled wire.