Basalt Fiber Felt

From Chopped Fiber to Felt Structure

A nonwoven product manufactured from basalt fibre, basalt fibre felt is appropriate for uses requiring insulation, fire resistance, and fibre reinforcement but not a continuous fabric surface. According to available product data, one use for chopped basalt fibre is the manufacture of felt or felting; other uses include passive fire-resistant materials and high-temperature insulation.

Depending on what is needed for further processing, the raw fibres can be chopped into different diameters and lengths. The technical standards need monofilament fibre sizes of 9, 13, and 17 micrometres, with a tolerance of ±1.5 micrometres; the specified cut lengths are 3, 6, 13, 15, 18, 25, 27, and 50 millimetres, with a tolerance of ±1.5 millimetres. The product moisture content standard is less than 2.0%, the heat conductivity is between 0.013 and 0.038 W/m Kelvin, and the elastic modulus is from 9100 to 11000 kg/mm².

Thermal and Fire-Protection Applications

Applications where the final material depends on a fibre barrier layer for reinforcement instead of within a concrete or polymer matrix are especially well suited for felt constructions. The application data now available includes thermal insulation baffles for machinery and metallurgical equipment, passive fire barriers, high-temperature filter felt products, and high-temperature industrial insulation panels.

Other qualities of basalt fibre include insulation, sound absorption, chemical resistance, high temperature resistance, and non-flammability. Because of these qualities, basalt fibre felt is more appropriate for industrial products where environmental and temperature endurance are crucial than the fabric's aesthetic appeal.

The necessary fibre diameter, cut length, density, and downstream forming procedure should be considered when choosing basalt fibre felt for customers creating thermal insulation or fireproofing goods. Depending on the intended structure and functionality of the final felt, several fibre sizes may be taken into consideration.