Basalt fibre has properties that are far superior to glass fibre. For example, basalt fabric subjected to the flame of a bunsen burner will redden and could withstand for several hours compared to a few seconds for a fibreglass fabric of the same density.
Basalt products resist flame, continuous temperatures of up to 815°C, chemicals (acids and bases), are very good acoustic and electrical insulators and have good mechanical properties. Because basalt remains functional down to -260°C, it can be used for high-temperature as well as cryogenic applications.
Basalt fibre products are particularly popular in the automotive sector, as building materials in the form of non-woven needled felts, or as insulation materials for exhaust pipes, for example in the form of sheaths, strips or fabrics. In addition, basalt fibre is the most environmentally friendly high temperature resistant material when it comes to both manufacturing and recycling it.
Basalt Fibre characteristics
Basalt fibre is made by the pultrusion of volcanic rocks, melted in blast furnaces. The fibre is drawn, as opposed to extrusion. This process makes it possible to create a continuous fibre, reinforced with a polymer.
Basalt fibre products withstand temperatures from -260°C to 815°C and have a thermal conductivity close to that of glass fibre and silica (0.031-0.038 W/m.K). The vitrification temperature of the basalt is 1050°C for a melting temperature of 1450°C.
Mechanical and physical properties
Basalt fibre has better physical and mechanical properties than fibreglass or silica fibre, particularly when it comes to tensile strength (4840 MPa), compression (550,000 psi), elongation at break (3.15%, superior only to silica fibre) and elastic modulus (89 GPa), for a fibre of about 9μm.
Basalt fibres are highly resistant to UV rays, chemicals (acids and bases), weather constraints (especially moisture), are rot-proof and remain sterile.
- Good tensile strength
- Non-toxic and inert, it produces no gas or smoke
- Resistant UV, chemicals and remains sterile
- Excellent dielectric insulator
- Excellent impact resistance
- Excellent thermal and acoustic insulation
- Withstands temperatures from -260°C to 815°C
- Cheaper than carbon, Kevlar® and fibreglass
Basalt Fibre applications
- Manufacture of composites and reinforcements
- Insulation of cables and pipes
- Thermal and dielectric insulation
Our range of Basalt Fibre products
Needled Basalt Fibre Felts
Made from basalt fibres, basalt felts do not burn, do not melt, produce neither smoke nor toxic gases, and are environmentally friendly and recyclable.
Basalt Fibre Sheaths
The basalt fibres sheaths have thermal and mechanical properties superior to those of fibreglass and can be used in the manufacture of composites.
Z-Rock®basalt fibre strips are mainly used in the automotive industry for the insulation of exhaust systems. They withstand a continuous temperature of 815°C.
Basalt Fibre Fabrics
Made from continuous basalt fibres, basalt fabrics are used for protective purposes such as fire barriers. They remain flexible and easy to handle, even if they lose their mechanical properties and become rigid under excessive tension.