Melt composition for the production of man-made vitreous fibres
AssigneeRockwool International A/S
InventorsMette Solvang, Svend Grove-Rasmussen, Mathilde Rosendahl Foldschack
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Abstract
The invention relates to a melt composition for the production of man-made vitreous fibres and man-made vitreous fibres comprising the following oxides, by weight of composition: SiO2 39-43 weight % Al2O3 20-23 weight % TiO2 up to 1.5 weight % Fe2O3 5-9 weight %, preferably 5-8 weight % CaO 8-18 weight % MgO 5-7 weight % Na2O up to 10 weight %, preferably 2-7 weight % K2O up to 10 weight %, preferably 3-7 weight % P2O5 up to 2% MnO up to 2% R2O up to 10 weight % wherein the proportion of Fe(2+) is greater than 80% based on total Fe and is preferably at least 90%, more preferably at least 95% and most preferably at least 97% based on total Fe.
Claims14
A melt composition for the production of man-made vitreous fibres comprising the following oxides, by weight of composition:
- SiO2
- 39-43 weight %
- Al2O3
- 20-23 weight %
- TiO2
- up to 1.5 weight %
- Fe2O3
- 5-9 weight %, preferably 5-8 weight %
- CaO
- 8-18 weight %
- MgO
- 5-7 weight %
- Na2O
- up to 10 weight %, preferably 2-7 weight %
- K2O
- up to 10 weight %, preferably 3-7 weight %
- P2O5
- up to 2%
- MnO
- up to 2%
- R2O
- up to 10 weight %
- wherein the proportion of Fe(2+) is greater than 80% based on total Fe and is preferably at least 90%, more preferably at least 95% and most preferably at least 97% based on total Fe.
Man-made vitreous fibres having a composition comprising the following oxides, by weight of composition:
- SiO2
- 39-43 weight %
- Al2O3
- 20-23 weight %
- TiO2
- up to 1.5 weight %
- Fe2O3
- 5-9 weight %, preferably 5-8 weight %
- CaO
- 8-18 weight %
- MgO
- 5-7 weight %
- Na2O
- up to 10 weight %, preferably 2-7 weight %
- K2O
- up to 10 weight %, preferably 3-7 weight %
- P2O5
- up to 2%
- MnO
- up to 2%
- R2O
- up to 10 weight %
- wherein the proportion of Fe(2+) based on total Fe is greater than 80%, preferably greater than 90%, more preferably greater than 95%, most preferably greater than 97%.
Dependencies are inferred from the claim text.