METHOD FOR PRODUCING MINERAL FIBRES
The present invention relates to a method for producing mineral fibres by internal spinning using a device comprising a basket and a fibre spinner suitable for turning jointly about a rotating axis, the basket comprising an annular wall perforated with a plurality of orifices and the fibre spinner comprising an annular wall perforated with a plurality of orifices, said method comprising: - supplying the basket with material to be turned into fibre at a temperature Ta; - and spinning the material to be turned into fibre by jointly rotating the basket and the fibre spinner, characterised in that the factor F is greater than 2000, the factor F being defined by (formula I) in which µa is the viscosity of the material to turn into fibre at the temperature Ta; d is the distance between the annular wall of the basket and the annular wall of the fibre spinner; N is the number of orifices of the basket; and Q is the supply rate of the material to be turned into fibre.