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Basalt sound-absorbing and heat-insulating cotton
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Basalt sound-absorbing and heat-insulating cotton

Basalt sound-absorbing and heat-insulating cotton is a kind of finished cotton with sound-absorbing and heat-insulating effects, which is formed by mixing basalt fiber and low melting point fiber through loosening, carding, mesh laying, high-temperature box, and finally through acupuncture or hot air process.
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Product introduction
  Basalt sound-absorbing and heat-insulating cotton is a kind of finished cotton with sound-absorbing and heat-insulating effects, which is formed by mixing basalt fiber and low melting point fiber through loosening, carding, mesh laying, high-temperature box, and finally through acupuncture or hot air process.
 
Product performance
 
  ■Hydrophobicity: ≥ 98%
 
  ■Bulk density: (10-50) kg / M ³
 
  ■ thickness: (5-100) mm
 
  ■ moisture content: ≤ 0.7%
 
  ■ flame retardancy: class V-0
 
  ■ thermal conductivity: ≤ 0.035w / (m · K)
 
  ■ noise reduction coefficient: 40mm ≥ 0.75
Applicable fields
 
  ● sound absorption and thermal insulation materials for aircraft, high-speed rail, rail vehicles, etc
 
  ● sound absorbing soft bags for airports, stations, theaters, cinemas and other places
 
  ● acoustic decoration and decoration of recording studio, listening room, interrogation room and other places;
 
  ● sound absorption and heat insulation of the front cover of the vehicle, and sound absorption and heat insulation between the top cover of the vehicle and the side and the door, etc.

Basalt fiber characteristics

Serial number

Product features

performance index

1

Outstanding mechanical properties

The density is 2.65 ~ 3.00g/cm3 and the tensile strength is 3300 ~ 4840mpa; The tensile strength, elastic modulus and elongation at break are higher than those of glass fiber, which has excellent wear resistance.

2

Excellent temperature resistance

The service temperature range of basalt fiber is: - 269 ℃ ~ 700 ℃; When working at 400 ℃ and 600 ℃, the fracture strength retention rate is ≥ 85% and ≥ 80% respectively; After 780 ~ 820 ℃ pretreatment, it can work at 860 ℃ without shrinkage.

3

Good chemical stability, acid and alkali corrosion resistance

K2O, MgO and TiO2 in the fiber significantly improve the chemical corrosion resistance and waterproof performance. The acidity coefficient of fiber is 4.86,    pH=0.34; At 2mol / L   After boiling in NaOH solution for 3 hours, the mass loss fraction was 0.0275%.

4

Good thermal shock resistance and stability

It can be used in 500 ℃ thermal vibration environment for a long time, and the mass loss is less than 0.02%,   At 900 ℃, the mass loss is only 0.03%.

5

Wave absorption and magnetic permeability

It has excellent microwave absorption performance, and the microwave absorption performance can be further improved after surface modification of magnetic materials.

6

Excellent dielectric properties

The dielectric loss tangent of basalt fiber with volume resistivity greater than 1012 Ω· m and treated with special wetting agent is 50% lower than that of glass fiber, which can be used to manufacture new heat-resistant dielectric materials.

7

Sound absorption and heat insulation

It has excellent sound absorption and sound insulation performance, and its low frequency absorption coefficient and peak absorption coefficient are all higher than traditional sound absorbing foam, preoxygenation wire and so on. The thermal conductivity is more than 20% lower than that of glass fiber, which is much lower than that of rock wool and other thermal insulation materials.

  Chongqing zhidu New Material Technology Co., Ltd. took the lead in mass production of ultra-fine basalt fiber (≤ 5um) in China. A series of high-strength and high modulus basalt fibers have been developed. The single fiber strength has exceeded 5800mpa and the fiber modulus has exceeded 100GPa. Compared with conventional basalt fibers, the properties have been greatly improved and have a wide application prospect.

Mechanical properties of high strength and high modulus basalt fiber

Fiber model

fiber diameter,um

Fiber monofilament strength,MPa

Fiber modulus,MPa

5-23

5

5730±80

104300±1500

7-46

7

5120±100

95100±1500

9-76

9

4800±80

91600±1400

Keyword:
Sound absorption
Thermal insulation
Basalt
Place
Products
last
between
40mm
automobile
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Time of issue:2018-08-27 00:00:00
Tel:+86-023-47289666 / +86-023-47221750  Add.:Tuanjiehu Big Data Intelligent Industrial Park, Jiangjin District, Chongqing.
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Time of issue:2021-05-10 18:07:22
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