Glass fiber forming compositions
AssigneePPG Industries Ohio, Inc.
InventorFrederick T Wallenberger
Life of this patent
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Abstract
A glass fiber composition has 52 to 62 percent by weight SiO2, 0 to 2 percent by weight NaO2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2, 1 to 5 percent by weight MgO, 0 to 5 percent by weight B2O3, to 0 to 2 percent by weight TiO2, and 0 to 1 percent by weight F, and further has a log 3 forming temperature of no greater than 1240° C. based on an NIST 714 relerence standard, a ΔT of at least 50° C., and a SiO2/RO ratio of no greater than 2.35.
Claims42
A glass fiber composition comprising:
- 13 SiO2 52 to 62 percent by weight;
- Na2O 0 to 2 percent by weight;
- CaO 16 to 25 percent by weight;
- Al2O3 8 to 16 percent by weight;
- Fe2O3 0.05 to 0.80 percent by weight;
- K2O 0 to 2 percent by weight;
- MgO 1 to 5 percent by weight;
- B2O3 0 to 5 percent by weight;
- TiO2 0 to 2 percent by weight;
- and F 0 to 1 percent by weight;
- wherein the glass composition has a log 3 forming temperature of no greater than 1240° C. based on an NIST 714 reference standard, a ΔT of at least 50° C., and a SiO2/RO ratio of no greater than 2.35.
The glass fiber composition according to claim 35, wherein the SiO2/RO ratio is in the ranges from 2.05 to 2.29.
A glass fiber composition comprising:
- 16 SiO2 53 to 59 percent by weight;
- Na2O 0 to 2 percent by weight;
- CaO 16 to 25 percent by weight;
- Al2O3 8 to 16 percent by weight;
- Fe2O3 0.05 to 0.80 percent by weight;
- K2O 0 to 2 percent by weight;
- MgO 1 to 4 percent by weight;
- B2O3 0 to 5 percent by weight;
- TiO2 0 to 2 percent by weight;
- and F 0 to 1 percent by weight;
- Li2O 0 to 1.5 percent by weight;
- ZnO 0 to 1.5 percent by weight;
- MnO 0 to 3 percent by weight;
- and MnO2 0 to 3 percent by weight.
- wherein the glass composition has a log 3 forming temperature of no greater than 1240° C. based on an NIST 714 reference standard, a ΔT in the range from 50 to 100° C., and a SiO2/RO ratio is in the range from 1.9 to 2.30.
Dependencies are inferred from the claim text.