Glass fiber is a kind of excellent inorganic non-metallic materials with a great variety. It has many advantages such as good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantage is brittle and poor wear resistance. It uses glass ball or waste glass as raw materials and is formed by high temperature melting, wire drawing, winding and weaving. The filament diameter is from several microns to over twenty micron which is equal to 1/20-1/5 of a hair with each bundle is formed by hundreds or even thousands of monofilament. Glass fiber is often used as the reinforced material in the composite material, electrical insulating materials and heat or thermal insulation materials. It is widely used in national economy field such as circuit board. Twistless roving is composed of parallel raw silk or parallel filaments. According to glass composition, twistless roving glass can be divided into good or better resin permeability. alkali free glass twistless roving and medium alkali glass twistless roving The diameter of glass fiber used in the production of glass roving is from 12 to 23 μm . The number of twistless roving is from 150 to 9600 (tex). Twistless roving can be directly used for producing some composite material with high content of glass?fiber. (6) In the preform process, twistless roving is widely used; Twistless roving has a good property of degradation and each bundle fibers is formed by hundreds or even thousands of monofilament. Twistless roving used for pultrusion can be formed by combined multiple strands or twistless roving. The diameter of glass fiber used in the production of glass roving is from 12 to 23 μm .
It is an excellent inorganic non-metallic materials with good insulation, good corrosion resistance and poor abrasion resistance. It have a great variety and produced by high temperature melting with glass ball or waste glass. It has high mechanical strength and can be used as electrical insulating materials and heat or thermal insulation. Each bundle fibers is formed by hundreds or even thousands of filaments with its diameter is from several microns to over twenty micron.
