Polyamide enameled round copper wire,class 220

Basic type:QY/220; PIW/220

Size range: 0.060-0.6mm

Material requirement: quality polyimide

Standard in accordance with: GB/T6109.6-2008; IEC 60317-7:1997

Product characteristics and application: Enameled round copper wire can be in 220c environment work continuously, in addition to heat resistant performance as a class 240 polyimide outside, in resistance to cold, resistant to radiation frozen agents, chemical resistance is the precious has outstanding performance. So widely used in atomic response, aerospace, coal mine motor, nuclear energy, military industry etc special field.

Enameled Wire Insulation

Although described as "enameled", enameled wire is not, in fact, coated with either a layer of enamel paint nor with vitreous enamel made of fused glass powder. Modern magnet wire typically uses one to four layers (in the case of quad-film type wire) of polymer film insulation, often of two different compositions, to provide a tough, continuous insulating layer. Magnet wire insulating films use (in order of increasing temperature range) polyvinyl formal (Formvar), polyurethane, polyamide, polyester, polyester-polyimide, polyamide-polyimide (or amide-imide), and polyimide. Polyimide insulated magnet wire is capable of operation at up to 250 °C. 

The insulation of thicker square or rectangular magnet wire is often augmented by wrapping it with a high-temperature polyimide or fiberglass tape, and completed windings are often vacuum impregnated with an insulating varnish to improve insulation strength and long-term reliability of the winding.

Self-supporting coils are wound with wire coated with at least two layers, the outermost being a thermoplastic that bonds the turns together when heated.

Other types of insulation such as fiberglass yarn with varnish, aramid paper, kraft paper, mica, and polyester film are also widely used across the world for various applications like transformers and reactors. In the audio sector, a wire of silver construction, and various other insulators, such as cotton (sometimes permeated with some kind of coagulating agent/thickener, such as beeswax) and polytetrafluoroethylene (Teflon) can be found. Older insulation materials included cotton, paper, or silk, but these are only useful for low-temperature applications (up to 105°C).

For ease of manufacturing, some low-temperature-grade magnet wire has insulation that can be removed by the heat of soldering.This means that electrical connections at the ends can be made without stripping off the insulation first.

The first International Women’s Day

Today is International Women's Day. Do you know the date of the first Women's day? Now let me tell you.

In 1869 British MP John Stuart Mill was the first person in Parliament to call for women’s right to vote. On 19 September 1893 New Zealand became the first country in the world to give women the right to vote. Women in other countries did not enjoy this equality and campaigned for justice for many years.

In 1910 a second International Conference of Working Women was held in Copenhagen. A woman named Clara Zetkin (Leader of the ‘Women’s Office’ for the Social Democratic Party in Germany) tabled the idea of an International Women’s Day. She proposed that every year in every country there should be a celebration on the same day - a Women’s Day - to press for their demands. The conference of over 100 women from 17 countries, representing unions, socialist parties, working women’s clubs, and including the first three women elected to the Finnish parliament, greeted Zetkin’s suggestion with unanimous approval and thus International Women’s Day was the result.