Apart mechanical superiority, basalt fiber has other merits such as better chemical resistance, better sound insulation, extended operating temperature range and better environmental friendliness and recyclability.

 

Basalt fiber laminate shows 45-50% higher tensile strength and 20-25% higher modulus compared to regular E-glass product. The following table presents some reference data:
 
  Units Basalt BCF-13-1200-KV12 Glass P 139 13.1200

Fiber density

g/cm3

2.67

2.55

Linear density

Tex

1200

1237

Laminates

Fiber Content (ISO 1172)

Weight %

78

79

Tensile Strength (ISO 9163)

MPa

3000

2050

Tensile Modulus (ISO 9163)

GPa

93

76

Tensile Elongation (ISO 9163)

%

3.5

3.02

 

Basalt fiber is excellent substitute to E-glass mainly in wind power generator blades and boat hulls production.
 

Thermal properties comparison

 
Products Basalt E-glass

Application temperature, °C

-260 up to +560

-60 up to +460

Short-term maximum operation temp. °C

Up to +700

Up to +550

Heat conductivity (W/m. °K)

0.031 - 0.038

0.034 - 0.04


After exposition under 400°C, basalt fibers lose only 20% of their initial strength, compared to more than 50% in the case of E-glass fibers.
 

Basalt fiber products and applications

 
Products Processes Applications

Roving

Filament winding; Pultrusion; SMC

High pressure vessels; Tanks & cylinders; Pipes

Chopped strand

BMC; Premix

Automotive parts; Friction materials; Fiber reinforced concrete

Non-woven & woven fabrics

Wet Hand Lay-up; RTM; Infusion; Prepregs

Boat hulls; Wind power blades; Fire protection; Heat & sound insulation; Ballistic protection

Geogrids & nets

-

Pavement reinforcement; Construction