Glass fibre reinforced plastic (GRP)

Glass fibre reinforced plastic consists of two main components: a polymer matrix and glass fibres, which serve as reinforcement. The matrix of the GRP plastic is usually made from thermoset polymers such as epoxy, polyester resin or vinyl ester, which form a solid structure after curing.  

The glass fibres themselves, on the other hand, are extremely thin, have a high tensile strength and are either randomly distributed or inserted into the matrix in an ordered manner. The proportion and orientation of the glass fibres within the matrix are decisive for the mechanical properties of the final composite material.  

Additives such as UV stabilisers, colourants and flame retardants can also be added to optimise the functionality and performance of the GRP for specific applications.

Glass fibre reinforced plastic - high rigidity with low weight 

GRP is characterised by a range of physical and mechanical properties that offer potential for a wide variety of applications. For example, GRP is known for its high strength and rigidity, which is often greater than that of many metals at a fraction of the weight. 

GRP is also corrosion-resistant, which makes it ideal for use in aggressive environments. It also has good fatigue resistance and low thermal expansion.  

This combination of properties makes GRP an excellent choice for applications where robustness and durability are required. In addition, the material offers good sound insulation and is non-conductive, making it useful for electrotechnical applications.

Is GRP environmentally friendly? 

Although GRP is durable and versatile, its disposal is a challenge as the material is not biodegradable and recycling can be complex due to the composite nature of the material.  

Research and developments in recycling technologies aim to improve the environmental performance of GRP, but at the moment, environmental friendliness is the material's biggest weakness. It is therefore important to use glass fibre reinforced plastics in long-lasting applications rather than in short-lived disposable products. 

From construction to automotive - applications of GRP 

The applications of glass fibre reinforced plastic are wide-ranging and can be found in many industries. In the construction industry, GRP is used for the manufacture of pipes, tanks and various building components where durability and corrosion resistance are required.  

In the automotive and aviation industries, components made from glass fibre reinforced plastic are valued for their low weight and high strength. GRP is also used in boat building, where its water resistance and strength come into play. Other applications include wind turbine blades, sports equipment and in medical technology for the manufacture of prostheses and orthopaedic supports.