Glass fiber
- Glass fiber is made of glass by pulling down the wire in high temperature melting state. Its diameter is generally 0.5-30μm, and its surface is treated with coupling agent, which improves the adhesion with resin. It is a reinforced material in FRP, mainly providing strength.
- Classification, performance and products are divided into alkali free, medium alkali and high alkali fiberglass according to chemical composition.
1). Twined roving
According to the production process, it can be divided into direct roving and indirect roving (composite roving),.
2). Chopped mat: it is made of 50-70mm short fiber. Common specifications: 300g / ㎡, 450g / ㎡.
3). Knitted mat: common specifications: 380g / ㎡, 450g / ㎡.
4). Glass fiber cloth: the unique production process of glass fiber surface felt determines that it has the characteristics of smooth surface, uniform fiber dispersion, smooth handle, good air permeability and fast resin penetration
It is divided into medium alkali cloth – 0.2:180 g / ㎡; 0.4:360 g / ㎡ non alkali cloth – 0.4:400 g / ㎡; 0.6:570 g / ㎡, etc.
5). Surface mat: the unique production process of glass fiber surface felt determines that it has the characteristics of smooth surface, uniform fiber dispersion, smooth hand feel, good air permeability and fast resin penetration
Resin
Resin is the matrix material in FRP, whose function is to transfer force load between fibers. It determines the heat resistance, corrosion resistance and aging resistance of FRP. Commonly used is unsaturated resin, epoxy resin, phenolic resin.
Auxiliary materials
Colorant (such as pigment paste), wear-resisting agent (quartz powder, diamond powder, etc.), flame retardant (halide), adding quartz sand and antistatic agent (graphite) to increase rigidity, etc.
