They are different in uses.
1. Rock wool board is mainly used in plane, such as roof or wall;
2. Rock wool felt is mainly used in arc or slope areas.
3. The length of the board is limited, and the length of the felt can be about 6M, which is more suitable for wrapping tubular or boiler.
4. Another difference is that the bulk density is different, the greater the bulk density, the greater the strength, the less easy to bend; the smaller the bulk density, the smaller the strength, the easier to roll;
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