Glass fibres with improved biological compatibility

US5332698A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter-Roger Nyssen · Dormagen, DE
• Wolfram Wagner · Dormagen, DE
• Geert Christoph · Dormagen, DE

Key dates

• Filing date: Jul 30, 1993
• Grant date: Jul 26, 1994
• Expiry date: Jul 30, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2213/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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. ______________________________________