| 摘要 |
The invention provides a method of making a mineral fibre batt comprising shell-core fibres and other fibres, the method comprising fiberising a melt to form a cloud of said other fibres, collecting said other fibres as a web by air-laying and forming the web into a batt, wherein the shell-core fibres are formed of a silicate network and comprise silicon, calcium, magnesium, iron, aluminium, oxygen and optionally alkali metal atoms and have an analysis expressed as percent by weight oxides including at least 3% FeO and 0 to 8% alkali metal oxide and at least 5% MgO, and in the shell-core fibres at least 70% of the iron is ferric and the fibres have a core surrounded by an outer surface layer less than 1 micron thick in which the peak concentration of magnesium atoms is at least 1.5 times the concentration of magnesium atoms in the total fibre, characterised in that the method comprises including the shell-core fibres in the batt by mixing the shell-core fibres with the other fibres after formation of the other fibres but before completion of formation of the batt from the web. |
