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Felt
| Product Description |
Kreca felt is a needle-puched felt made from Kreeca Tow. It is uniform in thickness, with a bulk density of 0.1g/cm3 and porosity of 95%. It is widely used as heat insulation such as for vacuum metallizing and vacuum sintering furnaces in which the temperature may rise beyond 1000 ℃. It is also suitable for corrsion-resistant filters, high heat-resistant protecive material, etc. Kureha offers two grades of Kreca Felt, carbon and graphite. Each grade is 5.0mm (500g/m2) and 10.0mm (1000g/m2).
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| Product Specifications |
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KRECA FELT
C |
KRECA FELT
G |
KRECA G
FELT |
| F-105 |
F-110 |
F-205 |
F-210 |
F-205G |
F-210G |
| Raw material |
PITCH |
PITCH |
RAYON |
| Area Weight (g/m2) |
500 |
1000 |
500 |
1000 |
500 |
1000 |
| Thickness (mm) |
8 |
16 |
8 |
16 |
5 |
10 |
| Bulk Density (g/cm3) |
0.06 |
0.06 |
0.10 |
| Carbon contents (wt %) |
> 95 |
> 99 |
> 99 |
| Ash contents (ppm) |
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standard (F-2XX) |
< 200 |
< 200 |
< 1000 |
| purified (F-3XX) |
- |
ave. 15 |
ave. 15 |
| ultra-purified (F-5XX) |
- |
ave. 2 |
ave. 2 |
| Electrical resistivity (Ω.m) |
10～15×10-3 |
4～5×10-3 |
6～8×10-3 |
| Average thermal conductivity *1 (W/m/K) |
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in Vac. |
0.27 |
0.27 |
0.30 |
| in N2 |
0.46 |
0.46 |
0.50 |
| Moisture regain (wt %) |
< 1.0 |
< 1.0 |
< 1.0 |
< 1.0 |
< 1.0 |
< 1.0 |
*1: Hot face temp. at 1000℃, insulator thickness 50mm Other grade of KRECA G FELT ; F-203G (3mmt), F-207G (7mmt) Contents.
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Carbon Products
