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.

Excel-file

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.