Views:1 Author:Site Editor Publish Time: 2021-05-01 Origin:Site
Fibreglass reinforced plastic (FRP), commonly known as fibreglass, is a thermoset plastic resin that is reinforced with glass fibres. A plastic resin comes in two different classes: thermosets and thermoplastics. The plastic resin system determines chemical, electrical, and thermal properties. Fibre provides strength, dimensional stability, and heat resistance. Additive provide colour and determine surface finish, and affect many other properties like weathering and flame retardancy. Processing of FRP composites involves complex chemical action. Final properties are determined by many factors, including the type, amount and composition of the resin systems and reinforcements. In addition, the use of an additive can greatly affect the FRP composite properties.
Benefits and features of FRP composites?
2）High strength, light weight
4）Parts consolidation and tooling minimisations
5）High dielectric strength and low moisture absorption
6）Minimum finishing required
7）Low moderate tooling cost
Glass fibres are among the most versatile industrial materials known today. They are available in virtually unlimited supply. All glass derived from compositions contain silica. They exhibit useful bulk properties like hardness, transparency, resistance to chemical attack, stability and inertness as well as desirable fibre properties like strength, flexibility and stiffness. Glass fibres are used in the manufacture of structural composites, printed circuit boards and a wide range of special purpose product.
Reusing and recycling of glass fibres
The use of FRP composites as high-performance material is increasing in aerospace, military, automobile and sports industries. It is very difficult to separate the fibre, filler polymer and resin if we are using glass fibre from a landfill without recycling, which is very dangerous. So recycling of the FRP composite is essential. Although researchers have developed new technologies to recycle FRP, fibres obtained from these technologies are short and fluffy, and are not treated after recycling. Longer fibres are more valuable, and for producing these, a new technology, called the steam system, was developed. Initially superheated steam system was used, but the fibres produced had lower tensile strength.
High-value recycled reinforced fibre with high performance can be re-manufactured into FRP. For that the surface modification of the fibre is necessary after recycling. Resin, which is over the surface of the fibre, is removed. Treated glass fibre and recycled carbon fibres can be re-manufactured by vacuum-assisted resin transfer molding (VARTM).