| 摘要 |
Glass fibres which are distinguished by either greatly reduced carcinogenicity have an average fibre diameter of <8 .mu.m, preferably ,3.mu.m, with more than 10% of the fibres having a diameter of ,3.mu.m. The types of glass used for producing these fibres are characterised by containing the following compounds in the proportions shown in mol-%: 55-70 % SiO2, 0-5 % B2O3, 0-3 % Al2O3, 0-6 % TiO2, 0-2 % iron oxides 0-5 % MgO, 8-24 % CaO, 10-20 % Na2O, 0-5 % K2O and 0-2 % fluoride.
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