Fibreglass is an inorganic non-metallic material with excellent performance. It has a wide variety of advantages. The advantages are good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. However, the disadvantage is that it is brittle and has relatively high wear resistance. difference. It is made of pyrophyllite, quartz sand, limestone, dolomite, boronite, and boronite as raw materials through high-temperature melting, drawing, winding, weaving and other processes. The diameter of its monofilament is how many A micrometer to more than twenty micrometers, equivalent to 1/20-1/5 of a hair strand, each fiber strand is composed of hundreds or even thousands of monofilaments. Glass fiber is usually used as a reinforcing material in composite materials, electrical insulation materials and thermal insulation materials, circuit boards and other fields of the national economy.
Production Process
There are two kinds of glass fiber production processes: two forming-crucible drawing method, and one forming-pool kiln drawing method.
The crucible drawing method has many processes. The glass material is first melted at a high temperature to form a glass ball, and then the glass ball is melted a second time, and high-speed drawing is made into a glass fiber precursor. This process has various drawbacks, such as high energy consumption, unstable molding process, and low labor productivity, and has been basically eliminated by large glass fiber manufacturers.
The pool kiln drawing method melts pyrophyllite and other raw materials in a kiln to form a glass solution, removes bubbles and transports it to the porous slat through the passage, and draws it into glass fiber strands at high speed. The kiln can be connected to hundreds of shrouds through multiple passages for simultaneous production. This process is simple, energy-saving, stable molding, high-efficiency and high-yield, and is convenient for large-scale fully automated production. It has become the international mainstream production process. The glass fiber produced by this process accounts for more than 90% of the global output.
