Rockwool International A/s

Soren Lund Jensen

Vermund Rust Christensen

Marianne Guldberg

Erling Lennart Hansen

Povl Nissen

Svend Grove-Rasmussen

Anders Ulf Clausen

Jens Ranlov

The properties of mineral fibres comprising silicon, magnesium, calcium, iron, aluminium and oxygen atoms are improved by exposure to a heat treatment under oxidising conditions which causes migration of MgO, thereby creating an outer layer with increased concentrations of MgO. Batts and other fibrous products containing the fibres have increased resistance to shrinkage and sintering.

Mineral fibre products

Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400&#xb0; C. Novel fibers contain at least 18% AlO. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibers may be selected by determining solubility at pH 4.5 or in macrophage.

Man-made vitreous fibres

Rock fibres are made from a melt formed from a blend of low and high halogen waste materials. 80 to 98% are low halogen materials (containing less than 0.5 wt. % halogen) and 2 to 20% are high halogen materials (containing at least 1 wt. % halogen).

Production of vitreous fibres using high halogen mineral waste as an ingredient

Mineral fiber products, in particular rigid bonded mineral fiber products, are provided which comprise composite mineral fibers having a coating-core configuration wherein the core provides at least 90% by weight of the fibers and is formed of mineral melt and the coating is coated onto the core. The mineral melt is chosen so that the fibers 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% or by weight of the core. The coated fibers retain their biological solubility while improving resistance to ageing in use.

Man-made vitreous fibres and their production

Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400&deg; C. Novel fibers contain at least 18% Al O . Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibres may be selected by determining solubility at pH 4.5 or in macrophage.

Growing community of inventors

Holte, Denmark

Soren Lund Jensen