The history of different enameled wire(1)
1) acetal enamelled wire
Acetal enamelled wire is one of the earliest varieties in the world development, launched by Germany, the United States has 1930 respectively, the Soviet union also developing rapidly, which has two kinds of PVF and polyvinyl acetaldehyde, success is in the '60 s research in China.The enameled wire is low heat resistance level (105 ° C to 120 ° C), but because of its excellent high temperature hydrolysis resistance and extensive used in oil-immersed transformer, this feature with the notarization in countries around the world, there is still a small amount of production in our country, especially the acetal paint BaoBian line used to make transposed conductor, used in large transformer .
2) polyester
By the west developed first in the '50 s with dimethyl terephthalate for polyester paint, since it has good heat resistance and mechanical strength, wide range of coating process, the price is low, since the 50 s became master of enameled wire main products of the market.But due to poor polyester heat shock, under the condition of high temperature, high humidity is easy to hydrolysis, the late 70 s as a polyester coating enameled wire in west Germany and the United States is no longer production, and in Japan, China and southeast Asia are still a lot of the production and use.Statistics show that in 1986 China's polyester production accounted for 96.4% of total output, after 10 years of efforts, the variety of enameled wire obtained the huge development.
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