Man-made vitreous fiber wool
AssigneeRockwool International
InventorsSoren Lund Jensen, Vermund Rust Christensen
Life of this patent
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Abstract
The production and physiological dissolution rate of mineral wool formed of MMV fibers containing 35-66% SiO.sub.2, up to 10% A1.sub.2 O.sub.3, 10-45% CaO, 2-30% MgO, up to 10% FeO, 0-7% Na.sub.2 O+K.sub.2 O and 0-10% TiO.sub.2 is improved by including both P.sub.2 O.sub.5 and B.sub.2 O.sub.3 in the composition.
Claims16
Mineral wool formed of MMV fibres having a composition, expressed as oxides by weight of total composition, which comprises
- SiO.sub.2 45 to 60%
- Al.sub.2 O.sub.3 0.5 to 4%
- CaO 10 to 30%
- MgO 7 to 20%
- FeO 1 to 9%
- Na.sub.2 O+K20 0 to 6%
- Na.sub.2 O 0 to 4%
- K.sub.2 O 0 to 2%
- TiO.sub.2 0.1 to 2%
- and which comprises both P.sub.2 O.sub.5 and B.sub.2 O.sub.3.
A process of production of MMVF wool formed of MMV fibres having a composition, expressed as oxides by weight of total composition, which comprises
- SiO.sub.2 45 to 60%
- Al.sub.2 O.sub.3 0.5 to 4%
- CaO 10 to 30%
- MgO 7 to 20%
- FeO 1 to 9%
- Na.sub.2 O+K.sub.2 O 0.1 to 2%
- P.sub.2 O.sub.5 +B.sub.2 O.sub.3 up to 20%
- and which includes both P.sub.2 O.sub.5 and B.sub.2 O.sub.3
- the process comprising
- providing raw materials to give the composition,
- providing a furnace,
- heating the raw materials in the furnace to a temperature between 1,400.degree. C. and 1,600.degree. C. to provide a melt, fiberising the melt, and collecting the fibres as wool.
Mineral wool formed of MMV fibres having a composition, expressed as oxides by weight of total composition, which comprises
- Sio.sub.2 45 to 60%
- Al.sub.2 O.sub.3 0.5 to 4%
- CaO 10 to 30%
- MgO 7 to 20%
- FeO 6.5 to 9%
- Na.sub.2 O+K.sub.2 O 0 to 6%
- Na.sub.2 O 0 to 4%
- K.sub.2 O 0 to 2%
- TiO.sub.2 0.1 to 2%
- P.sub.2 O.sub.5 +B.sub.2 O.sub.3 up to 20%
- and which includes both P.sub.2 O.sub.5 and B.sub.2 O.sub.3.
A process of production of MMVF wool formed of MKV fibres having a composition, expressed as oxides by weight of total composition, which comprises
- SiO.sub.2 45 to 60%
- Al.sub.2 O.sub.3 0.5 to 4%
- CaO 10 to 30%
- MgO 7 to 20%
- FeO 6.5 to 9%
- Na.sub.2 O+K.sub.2 O 0 to 6%
- Na.sub.2 O 0 to 4%
- K.sub.2 O 0 to 2%
- TiO.sub.2 0.1 to 2%
- P.sub.2 O.sub.5 +B.sub.2 O.sub.3 up to 20%
- and which includes both P.sub.2 O.sub.5 and B.sub.2 O.sub.3 the process comprising
- providing raw materials to give the composition,
- providing a furnace,
- heating the raw materials in the furnace to a temperature between 1,400.degree. C. and 1,600.degree. C. to provide a melt, fiberising the melt, and collecting the fibres as wool.
Dependencies are inferred from the claim text.