Ceramics-Silikáty 34, (2) 119 - 128 (1990)

Thermally imulating materials of mineral fibres can be regarded as a theedimensional system of originally drop-shaped formations drawn into ones with extremely low thickness-to-length ratios. The original formalions arise by dividing a liquid melt into large numbers of small particles whose dimemions and shape depend on surface tension σ of the melt, and on force F which removes the particles from the point of their formation. Force F depends cm the mass of the particle being formed and on the speed of its movement. The relationships which have been derived indicate that the calculated fibre thickness increasea with the third power of radius of the spherical part of the drop-shaped formation. To raise the yield of the melt in the manufacture of mineral fibres, one should therefore divide the melt into the largeat possible amount of small-size parlicles.