Glass fibres with improved biological compatibility
AssigneeBayer Aktiengesellschaft
InventorsPeter R. Nyssen, Wolfram Wagner, Geert Christoph
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Abstract
Glass fibres which are distinguished by their 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 characterized by containing the following compounds in the proportions shown in mol %: ______________________________________ SiO.sub.2 55-70 B.sub.2 O.sub.3 0-4 Al.sub.2 O.sub.3 0-1 TiO.sub.2 0-6 Iron oxides 0-2 MgO 0-5 CaO 12-20 Na.sub.2 O 10-20 K.sub.2 O 0-5 fluoride 0-2. ______________________________________
Claims3
Glass fibres with improved biological compatibility, comprising fibres having a length of from 5.mu.to 150 .mu.m, an average diameter of .ltoreq.8 .mu.m and more than 10% of which have a diameter of .ltoreq.3 .mu.m, and wherein the glasses used for producing the fibres consist essentially of the following compounds in the proportions give in mol %:
- ______________________________________ SiO.sub.2 55-70 B.sub.2 O.sub.3 0-4 Al.sub.2 O.sub.3 0-1 TiO.sub.2 0-6 Iron oxides 0-2 MgO 0-5 CaO 12-20 Na.sub.2 O 10-20 K.sub.2 O 0-5 Fluoride 0-2 ______________________________________
Dependencies are inferred from the claim text.