Claims
- 1. Glass fibers which have been flame attenuated and comprise an outer shell, and have been prepared from a composition consisting essentially of, in mol percent:SiO266-69.7Al2O3 0- 2.2RO 7-18R2O 9-20B2O3 0- 7.1the glass fibers exhibiting biodissolution in excess of 150 ng/cm2/hr.
- 2. The glass fibers of claim 1, wherein said composition consists essentially of, in mol percent:SiO266- 69.0Al2O3 0- 2.2RO 7-16R2O 9-19B2O3 0- 7.1.
- 3. The glass fibers of claim 1, wherein said composition consists essentially of, in mol percent:SiO266- 68.25Al2O3 0- 2.2RO 7-13R2O 9- 18B2O3 0- 7.1.
- 4. The glass fibers of claim 1, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 5. The glass fibers of claim 2, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2hr.
- 6. The glass fibers of claim 3, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 7. The glass fibers of claim 1, wherein the measured biodissolution of the fibers is greater than about 400 ng/cm2hr.
- 8. The glass fibers of claim 2, wherein the measured biodissolution of the fibers is greater than about 400 ng/cm2/hr.
- 9. The glass fibers of claim 3, wherein the measured biodissolution of the fibers is greater than about 400 ng/cm2/hr.
- 10. The glass fibers of claim 1, wherein the fibers exhibit C(acid) ≧2.00, C(bio) ≦2.23 and C(moist) ≧2.50.
- 11. The glass fibers of claim 1, wherein the fibers exhibit C(acid) ≧2.00, C(bio) ≦2.20 and C(moist) ≧2.60.
- 12. The glass fibers of claim 1, wherein the fibers have been prepared by the rod process.
- 13. Flame attenuated glass fibers, said fibers having an outer shell depleted at least some volatile oxides, said fibers prepared from a glass composition comprising, in mol percent:SiO266- 69.0Al2O3 0- 2.2RO 7-16R2O 9-19B2O3 0- 7.1characterized by a C (acid) ≧ 2.00, a C(bio) ≦ 2.23, a C(moist) ≧ 2.50, and a biodissolution of greater than about 150 ng/cm2/hr.
- 14. The fibers of claim 13, wherein said fibers exhibit biodissolution ≧300 ng/cm2/hr.
- 15. The fibers of claim 13, wherein said glass composition comprises, in mol percent:SiO266- 68.25Al2O3 0- 2.2RO 7-13R2O 9- 18B2O3 0- 7.1said C(acid) ≧2.00, said C(bio) ≦2.20, said C(moist) ≧2.60, and said fibers exhibiting biodissolution ≧300 ng/cm2.
- 16. A glass fiber prepared by flame attenuation and comprises an outer shell, said fiber being prepared from a glass composition consisting essentially of, in mol percent:SiO266.5-67.8Al2O3 0.5-1.5B2O3 5.0-7.0CaO 3.0-7.0MgO 3.0-7.0Na2O14.0-17.0K2O 0.1-0.4wherein the sum of CaO and MgO is between about 8.0 and 12.0, said glass fiber exhibiting biodissolution greater or equal to about 350 ng/cm2/hr.
- 17. Flame attenuated glass fibers having an outer shell, prepared from a glass composition comprising, in mol percent:SiO266-69.7Al2O32.2RO18 R2O20 B2O37.1where R2O is an alkali metal oxide and RO is an alkaline earth metal oxide, the glass composition having a C(acid) ≧ 1.95, a C(bio) ≦ 2.30, a C(moist) ≧ 2.46, and with the glass fibers exhibiting biodissolution in excess of 150 ng/cm2/hr.
- 18. The glass fibers of claim 7, wherein said glass composition from which the fibers are prepared comprise, in mol percent:SiO266-69.0Al2O30-2.2RO7-16 R2O9-19 B2O3 0-7.1.
- 19. The glass fibers of claim 17, wherein said glass composition from which the fibers are prepared comprise, in mol percent:SiO2 66-68.25Al2O30-2.2RO7-13 R2O9-18 B2O3 0-7.1.
- 20. The glass fibers of claim 17, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 21. The glass fibers of claim 18, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 22. The glass fibers of claim 18, wherein said fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 23. The glass fibers of claim 17, wherein said fibers have a measured biodissolution rate of greater than 400 ng/cm2/hr.
- 24. The glass fibers of claim 18, wherein said fibers have a measured biodissolution rate of greater than 400 ng/cm2/hr.
- 25. The glass fibers of claim 19, wherein said fibers have a measured biodissolution rate of greater than 400 ng/cm2/hr.
- 26. The glass of claim 17, wherein the fibers exhibit C(acid) ≧ 2.00, C(bio) ≦ 2.23 and C(moist ) ≧ 2.50.
- 27. The glass fibers of claim 26, wherein the fibers have a measured biodissolution rate of greater than 300 ng/cm2/hr.
- 28. The glass fibers of claim 26, wherein the fibers have a measured biodissolution rate of greater than 400 ng/cm2/hr.
- 29. A method for preparing glass fibers, which comprises contacting a primary with sufficient high temperature to create a loss of at least some volatile compounds of the primaries to thereby create an outside shell which has a different composition than the fiber interior, where the primaries are prepared from a composition comprised of, in mol percent:SiO266-69.7Al2O30-2.2RO7-18 R2O9-20 B2O30-7.1the glass fibers exhibiting biodissolution in excess of 150 ng/cm2/hr.
- 30. The method of claim 29, wherein a pot and marble technique is employed to prepare the glass fibers.
- 31. The method of claim 29, wherein a direct melt method is employed to prepare the glass fibers.
RELATED APPLICATIONS
This application is a continuation of application Ser. No. 09/313,635, filed on May 18, 1999, now abandoned; which in turn is a continuation-in-part of U.S. Ser. No. 08/827,571, filed Mar. 28, 1997, now U.S. Pat. No. 5,945,360.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5108957 |
Cohen et al. |
Apr 1992 |
A |
5401693 |
Bauer et al. |
Mar 1995 |
A |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/313635 |
May 1999 |
US |
Child |
09/902590 |
|
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/827571 |
Mar 1997 |
US |
Child |
09/313635 |
|
US |