METHOD OF PRODUCING WATER-SOLUBLE GLASS FIBRES

摘要

There is provided a method for forming a water-soluble glass fibre or wool. The method comprises heating the glass composition above its melting point to produce a molten glass and then cooling the molten glass slowly to a pre-selected working temperature at which the fibres will be drawn. Suitable working temperature include those in a range of 400 to 1000 DEG C. The working temperature will usually be at least 200 DEG C lower than the temperature to which the molten glass is heated above its melting point and may be 50-300 DEG C above the Tg of the glass. Phosphorous pentoxide is suitable as a glass former and B203 may be present as an additive. Optionally the glass may release silver ions, e.g. by addition of silver orthophosphate during manufacture of the glass.