High performance fiberglass composition
AssigneeOCV Intellectual Capital, LLC
InventorsPeter Bernard McGinnis, Michelle Korwin-Edson
Life of this patent
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Abstract
A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.
Claims20
A glass composition comprising:
- SiO2 in an amount from 55.0 to 60.4% by weight;
- Al2O3 in an amount from 19.0 to 25.0% by weight;
- CaO in an amount from 7 to 12.0% by weight;
- MgO in an amount from 8.0 to 15.0% by weight;
- Na2O in an amount from 0 to 1.0% by weight;
- Li2O in an amount less than 0.5% by weight;
- and
- TiO2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the weight percent ratio of Al2O3/MgO is less than 2.0, and wherein said glass composition has a fiberizing temperature no greater than 2,500° F.
A glass composition comprising:
- SiO2 in an amount from 55.0 to 65.0% by weight;
- Al2O3 in an amount from 19.0 to 25.0% by weight;
- CaO in an amount from 7 to 12.0% by weight;
- MgO in an amount from 8.0 to 15.0% by weight;
- Na2O in an amount from 0 to 1.0% by weight;
- Li2O in an amount less than 0.5% by weight;
- and
- TiO2 in an amount from 0.0 to 1.5% by weight, wherein the total weight percentage of CaO and MgO is greater than 20% by weight and the weight percent ratio of Al2O3/MgO is less than 2.0, and wherein said glass composition has a fiberizing temperature no greater than 2,500° F.
A glass fiber formed from a glass composition comprising:
- SiO2 in an amount from 55.0 to 60.4% by weight;
- Al2O3 in an amount from 19.0 to 25.0% by weight;
- CaO in an amount from 7 to 12.0% by weight;
- MgO in an amount from 8.0 to 15.0% by weight;
- Na2O in an amount from 0 to 1.0% by weight;
- Li2O in an amount less than 0.5% by weight;
- and
- TiO2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the weight percent ratio of Al2O3/MgO is less than 2.0, and wherein said glass fiber has a tensile strength of at least 4,800 MPa.
A reinforced composite product comprising;
- a polymer matrix;
- and
- a plurality of glass fibers formed from a glass composition comprising:
- SiO2 in an amount from 55.0 to 60.4% by weight;
- Al2O3 in an amount from 19.0 to 25.0% by weight;
- CaO in an amount from 7 to 12.0% by weight;
- MgO in an amount from 8.0 to 15.0% by weight;
- Na2O in an amount from 0 to 1.0% by weight;
- Li2O in an amount less than 0.5% by weight;
- and
- TiO2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the weight percent ratio of Al2O3/MgO is less than 2.0, and wherein said glass fibers have tensile strengths of at least 4,800 MPa.
Dependencies are inferred from the claim text.