FIBRES AND THEIR PRODUCTION
Continous glass filaments, and fibres obtained by comminuting the filaments and microfibres obtained by flame attenuation of the filaments, are formed o f a substantially colourless aluminosilicate glass containing 25 to 52% SiO2, 20 to 35% AL2O3 and 0 to 1.5% FeO and having good biosolubility.
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