Glass fiber glass as raw material, in the molten state with a variety of different molding methods. Generally divided into continuous glass fiber and discontinuous glass fiber. And the market more for the continuous glass fiber. According to the current standard of our country, there are two kinds of continuous glass fiber products. One is the medium alkali glass fiber, code named C; one is the alkali free glass fiber, code named E. The main difference between them is the content of alkali metal oxide. Medium alkali glass fiber is (12 + 0.5)%, alkali free glass fiber is <0.5%.
There is a market for non standard products of glass fiber. Commonly referred to as high alkali glass fiber. Alkali metal oxide was more than 14%. Raw materials for the production of flat glass or broken glass bottles. The glass fiber with poor water resistance, low mechanical strength, low electrical insulation, for the state does not allow the production of products.
General qualified in alkali, non alkali glass fiber yarn products, must be tightly wound on the bobbin, each bobbin are marked with number, number of shares and grade, the packing box products should have the certificate of inspection. Product inspection certificate includes:
1.Name of manufacturer；
2.Code and grade of products；
3.This standard number；
4.Special seal for quality inspection；
5.Net weight；
6.There should be a factory name, product code and grade, standard number, net weight, production date, batch number and so on.。
