Glassfibre-reinforced plastic (GRP)
Mechanical and thermal properties
Fibre-reinforced plastic (FRP) is a corrosion-resistant construction material with the same physical properties as steel, but without the limited resistance to heat and cold often found with thermoplastics.
By varying the volume and type of plastic and glassfibre, the glassfibre orientation and any filler, it is possible to optimise the mechanical and chemical properties of laminate to suit a wide range of applications.
Fibre-reinforced plastic has low thermal conductivity compared to conventional construction materials. It is also much more resistant to heat and cold than non-reinforced plastic materials. With this combination, FRP provides excellent fire safety properties.
Example of properties for various standard laminates
Laminate I | Laminate II | Laminate III | Laminate IV | |
Axial tensile strength (initial): N/mm² | 80 | 125 | 125 | 50 |
Tangential tensile strength (initial): N/mm² | 160 | 250 | 125 | 400 |
Axial bending strength (initial): N/mm² | 160 | 175 | 200 | 100 |
Tangential bending strength (initial): N/mm² | 250 | 350 | 200 | 500 |
Axial E-module (bend, initial): N/mm² | 7 000 | 10 000 | 8 500 | 8 000 |
Tangential E-module (bend, initial): N/mm² | 9 000 | 12 000 | 8 500 | 25 000 |
Density: Kg/m³ | 1 500 | 1 500 | 1 500 | 1 780 |
Coefficient of linear thermal expansion: 10 ? 6/K | 30 | 30 | 30 | 30 |
Thermal conductivity: W/(m x K) | 0,3 | 0,3 | 0,3 | 0,3 |
Thermal capacity: Kj/(Kg x K) | 1,26 | 1,26 | 1,26 | 1,26 |
We also produce special laminates for various applications. Thanks to their low weight, FRP products are easy to transport and assemble. When carrying out cost comparisons with other materials, it is important to remember that FRP is practically a maintenance-free material.