There are two kinds of glass fiber production processes: two-time forming-crucible drawing method, and one-time forming-pool kiln drawing method.
The crucible drawing method has many processes. The glass raw material is first melted into glass balls at high temperature, and then the glass balls are melted twice, and high-speed wire drawing is made into glass fiber precursor. This process has various drawbacks such as high energy consumption, unstable molding process, low labor productivity, etc., which is basically eliminated by large glass fiber manufacturers.
