Basalt Super Thin Fober - basic characteristics & advantages

Basalt Super thin fibers &BSTF materials

STBF primary felt

BSTF are layer staple fibers with diameter of 1~3 microns, mixed and fastened among themselves, the regular form of this product is felt (felt of basalt wool).

На основе холста БСТВ производятся тепло и звукоизоляционные материалы: маты, прошивные маты, иглопробивные холсты, картон, мягкие и жесткие плиты.

Table 1. BSTF Basic Characteristics

N	Item	Unit	Figure
1.	Filaments diameter	µm	1-3
2.	Filaments length	mm	30-60
3.	Volumetric mass	kg/m³	18-25
4.	Heat conductivity, at 300°C	Wt/m*K°	0,035-0,036
5.	Temperature of application	°C	-200. +600

Advantages of BSTF

1. It’s made only from basalts, not any other materials;

2. It has good heat-insulation qualities;

3. The material is absolutely nonflammable, it has high thermo durability.

Temperature of long application is up to 700 °C, temperature of short-term application is up to 1000 °C;

4. High chemical durability towards water, salt solutions, alkali and acids;

Table 2. **Chemical durability of BF**
N test specimen	H2O	0.5 n NaOH	2n NaOH	2 n HCl
# 1	99.6	98.3	93.1	76.7
# 2	99.7	98.9	91.3	69.6

5. High sound-proof characteristics and durability to vibration;

Table 3. Sound-proof characteristics durability to vibration of BSTF materials
Density of a material ?=15 kg / m3. Thickness of a material of 30 mm. Size of a gap between a material and insulating wall of 0.0 mm.
Range of frequencies, Hz	100 - 300	400 - 900	1200 - 7000
Normal coefficient of a sound absorption	0.05 - 0.15	0.22 - 0.75	0.85 - 0.93
Density of a material p=15 kg / m3. Thickness of a material of 30 mm. Size of a gap between a material and insulating wall of 100 mm.
Range of frequencies, Hz	100 - 200	300 - 900	1200 - 7000
Normal coefficient of a sound absorption	0.15	0.86 - 0.99	0.74 - 0.99