MAN-MADE VITREOUS FIBRES AND THEIR PRODUCTION

摘要

Mineral fibre products, in particular rigid bonded mineral fibre products, are provided which comprise composite mineral fibres having a coating-core configuration wherein the core provides at least 90 % by weight of the fibres and is formed of mineral melt and the coating is coated onto the core. The mineral melt is chosen so that the fibres without coating have adequate biological solubility and the coating comprises a phosphate or hydrogen phosphate of alkali metal, quaternary ammonium or ammonium in an amount of at least 0.3 % by weight of the core. The coated fibres surprisingly retain their biological solubility whilst having improved resistance to ageing in use.