Product based on mineral fibers and process for obtaining it
AssigneeSaint-Gobain Isover
InventorsArnaud Letourmy, Eric Mangematin, Patrice Martins
Life of this patent
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Abstract
A thermal insulation product based on mineral wool, characterized in that the fibers have a micronaire of less than 10 l/min, preferably less than 7 l/min and especially between 3 and 6 l/min, and in that the material has a thermal conductivity of less than 31 mW/m·K, especially less than 30 mW/m·K. The parameters for obtaining this product are in particular the pressure of the burner, the rotation speed of the fiberizing spinner and the daily fiber output per spinner orifice.
Claims8
In an internal centrifugation fiberizing process for producing a thermal insulation product with an internal centrifugation device comprising (1) a spinner capable of rotating about an axis X which has its peripheral band drilled with a plurality of orifices for delivering filaments of a molten material, (2) a high-temperature gas attenuating unit in the form of an annular burner which attenuates the filaments into fibers, (3) a receiving belt for receiving the fibers, and (4) a conveyor for the fibers that extends the receiving belt;
- the improvement wherein the conveyor conveys the fibers at a speed greater than a speed of the receiving belt by more than 15% and the process produces a thermal insulation product having at least 80% of its fibers aligned approximately parallel to longer dimensions of planes of the thermal insulation product, meaning a parallelism to within plus or minus 30° with respect to the planes formed by the longer dimensions of the product.
Dependencies are inferred from the claim text.