| Fiberglass Noise Reduction Cotton
When applying the glassfiber Noise Reduction Cotton to the car exhaust pipe, engine cover or electronics, they have special features including in below:
1. It contain numerous microcellulars, porosity, when noise absorb into the cotton will create a friction layer with the microcellular. It can absorb almost 90% of the noise. It is a good design for noise protection and has reached NRC standard.
2. glassfiber Noise Reduction Cotton have advanced heat-resistance at 7000C, advanced toughness and anti-corrosion.
3. It has advanced tensile strength and maintain stability of length.
4. It won’t change size use to the high heat, long lasting used
It can be widely used for any mechanic that contain motor engine such as car, motor-cycle, vessels and air-planes.
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Fiberglass Chemical Composition（Weight％）
|
|
SiO2
|
Al2O3
|
CaO
|
MgO
|
B2O3
|
Impurity
|
|
R2O
|
Fe2O3
|
Other
|
|
54.1±0.5
|
14.6±0.4
|
16.6±0.3
|
4.6±0.3
|
8.8±0.5
|
＜0.8
|
＜0.5
|
Allowance
|
Fiberglass Thermal Conductivity：
|
Temperature（℃）
|
25°
|
100°
|
200°
|
300°
|
400°
|
500°
|
600°
|
700°
|
|
Thermal Conductivity
（kcal/mhr℃）
|
0.030
|
0.037
|
0.048
|
0.058
|
0.076
|
0.094
|
0.112
|
0.16
|
Fibreglass Absorption and Vibration Property：
|
（Hz）
|
125
|
250
|
500
|
1000
|
2000
|
4000
|
|
sound absorption coefficient
|
0.32
|
0.76
|
0.94
|
0.96
|
0.95
|
0.98
|
|
