Glass strands with low alumina content capable of reinforcing organic and/or inorganic materials
AssigneeSaint-Gobain Technical Fabrics Europe
InventorsAnne Berthereau, Emmanuelle Picard, Jerome Lalande
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Abstract
The invention relates to reinforcing glass strands, the composition of which comprises the following constituents within the limits defined below expressed as percentages by weight: SiO2 62-72% Al2O3 2-10% CaO 7-20% MgO 1-7% Na2O + K2O + Li2O 10-14.5% Li2O 0-2% BaO + SrO + ZnO 0-4% B2O3 0-4% F2 0-2% As2O3 0-0.15% These strands are composed of a low-cost glass offering an excellent compromise between the mechanical properties represented by the tensile strength and the fiberizing conditions. The invention also relates to the composites based on organic and/or inorganic material(s) and the aforementioned glass strands.
Claims16
A reinforcing glass strand, having a composition comprising the following constituents expressed as percentages by weight:
- SiO2:
- 62-72%
- Al2O3:
- 2-10%
- CaO:
- 7-20%
- MgO:
- 1-7%
- Na2O+K2O+Li2O:
- 10-14.5%
- Li2O:
- 0-2%
- BaO+SrO+ZnO:
- 0-4%
- B2O3:
- 0-4%
- F2:
- 0-2%, and
- AS2O3:
- 0-0.15%
Dependencies are inferred from the claim text.