초록

A glass composition useful in preparing fiberglass comprises 12 to 25 weight % CaO; 12 to 16 weight % Al2O3; 52 to 62 weight % SiO2; 0.05 to 0.8 Fe2O3; and greater than 2 up to about 8 weight % alkali metal oxide.

대표청구항 ▼

1. A method of making fiberglass, the method comprising: providing a combination of recycled glass cullet and minerals,heating the combination to a melting temperature for the recycled glass cullet and minerals to form a molten material;forming the molten material into fiberglass, wherein the fiberg

1. A method of making fiberglass, the method comprising: providing a combination of recycled glass cullet and minerals,heating the combination to a melting temperature for the recycled glass cullet and minerals to form a molten material;forming the molten material into fiberglass, wherein the fiberglass comprises12 to 25 weight % CaO,12 to 16 weight % Al2O3,52 to 62 weight % SiO2,0.05 to 0.8 weight % Fe2O3, and3 to about 8 weight % alkali metal oxide, wherein the alkali metal oxide comprises at least 3 weight percent sodium oxide. 2. The method of claim 1, wherein the fiberglass comprises 16 to 25 weight % CaO. 3. The method of claim 1, wherein the fiberglass comprises 12 to 1.6 weight % CaO. 4. The method of claim 1, wherein the fiberglass further comprises B2O3 in an amount up to 10 weight %. 5. The method of claim 4, wherein the fiberglass comprises about 3.5 to about 5.5 weight % B2O3. 6. The method of claim 1, wherein the fiberglass further comprises MgO in an amount up to 5 weight %. 7. The method of claim 1 wherein the fiberglass further comprises TiO2 in an amount up to 1.5 weight %. 8. The method of claim 1, wherein the fiberglass further comprises fluorine in an amount up to 1.0 weight %. 9. The method of claim 1, wherein the method provides greater than 5 weight % recycled glass. 10. The method of claim 9, wherein the method provides up to 55 weight % recycled glass. 11. The method of claim 1, wherein the method provides up to 55 weight % recycled glass. 12. The method of claim 1, wherein the alkali metal oxide further comprises one or more alkali metal oxides selected from the group consisting of K2O and Li2O. 13. The method of claim 1, wherein the fiberglass comprises Li2O in an amount up to 5 weight %. 14. The method of claim 1, wherein the fiberglass has a Tlog3 temperature of less than 2300° F. 15. The method of claim 1, Wherein the fiberglass has temperature of less than 2220° F. 16. The method of claim 1, wherein the fiberglass has a Tlog3 temperature of less than 2160° F. 17. The method of claim 1, wherein the fiberglass has a liquidus temperature at least 100° F. less than the Tlog3 temperature of the fiberglass. 18. The method of claim l, wherein the fiberglass has a liquidus temperature at least 140° F. less than the Tlog3 temperature of the fiberglass. 19. The method of claim 1, wherein the fiberglass has as liquidus temperature at least 160° F. less than the Tlog3 temperature of fiberglass. 20. The method of claim 1 wherein the fiberglass is formed using a non-Pt/Rh bushing.