초록 ▼

There is provided a glass fiber comprising the SiO2 content is 57.0 to 63.0% by weight; the Al2O3 content is 19.0 to 23.0% by weight; the MgO content is 10.0 to 15.0% by weight; the CaO content is 4.0 to 11.0% by weight; and the total content of SiO2, Al2O3, MgO and CaO is 99.5% by weight or higher

There is provided a glass fiber comprising the SiO2 content is 57.0 to 63.0% by weight; the Al2O3 content is 19.0 to 23.0% by weight; the MgO content is 10.0 to 15.0% by weight; the CaO content is 4.0 to 11.0% by weight; and the total content of SiO2, Al2O3, MgO and CaO is 99.5% by weight or higher based on the total weight.

대표청구항 ▼

1. A glass fiber, comprising: a SiO2 content of 57.0 to 63.0% by weight;a Al2O3 content of 19.0 to 23.0% by weight;a MgO content of 10.0 to 15.0% by weight; anda CaO content of 5.5 to 11.0% by weight, anda total content of SiO2, Al2O3, MgO and CaO of 99.5% by weight or higher based on a total weight

1. A glass fiber, comprising: a SiO2 content of 57.0 to 63.0% by weight;a Al2O3 content of 19.0 to 23.0% by weight;a MgO content of 10.0 to 15.0% by weight; anda CaO content of 5.5 to 11.0% by weight, anda total content of SiO2, Al2O3, MgO and CaO of 99.5% by weight or higher based on a total weight thereof,a weight ratio of the SiO2 content/the Al2O3 content of 2.7 to 3.2, anda weight ratio of the MgO content/the CaO content of 0.8 to 2.0, wherein wherein the SiO2 content/(the SiO2 content+the MgO content+the CaO content)×100 is 71.0 or more and 81.0 or less, a devitrification primary phase of the glass is a cordierite crystal or a mixed crystal of cordierite and anorthite, and the glass fiber has an elastic modulus of 95 GPa or higher. 2. The glass fiber according to claim 1, comprising: a total content of the SiO2 content and the Al2O3 content of 77.0 to 85.0% by weight. 3. The glass fiber according to claim 1, comprising: a total content of the MgO content and the CaO content of 16.0% by weight or higher. 4. The glass fiber according to claim 1, comprising: a SiO2 content of 57.0 to 62.0% by weight. 5. The glass fiber according to claim 4, comprising: a weight ratio of the SiO2 content/the Al2O3 content of 2.7 to 3.1. 6. The glass fiber according to claim 5, comprising: a total content of the SiO2 content and the Al2O3 content of 77.0 to 85.0% by weight. 7. The glass fiber according to claim 5, comprising: a total content of the MgO content and the CaO content of 16.0% by weight or higher. 8. The glass fiber according to claim 5, further comprising a Fe2O3 and an alkali metal oxide, and a total content of the Fe2O3 content and the alkali metal oxide content of 0.4% by weight or less. 9. The glass fiber according to claim 4, comprising: a total content of the SiO2 content and the Al2O3 content of 77.0 to 85.0% by weight. 10. The glass fiber according to claim 9, comprising: a total content of the MgO content and the CaO content of 16.0% by weight or higher. 11. The glass fiber according to claim 9, further comprising a Fe2O3 and an alkali metal oxide, and a total content of the Fe2O3 content and the alkali metal oxide content of 0.4% by weight or less. 12. The glass fiber according to claim 4, comprising: a total content of the MgO content and the CaO content of 16.0% by weight or higher. 13. The glass fiber according to claim 12, further comprising a Fe2O3 and an alkali metal oxide, and a total content of the Fe2O3 content and the alkali metal oxide content of 0.4% by weight or less. 14. The glass fiber according to claim 4, further comprising a Fe2O3 and an alkali metal oxide, and a total content of the Fe2O3 content and the alkali metal oxide content of 0.4% by weight or less. 15. The glass fiber according to claim 1, comprising: a weight ratio of the SiO2 content/the Al2O3 content of 2.7 to 3.1. 16. The glass fiber according to claim 1, further comprising a Fe2O3 and an alkali metal oxide, and a total content of the Fe2O3 content and the alkali metal oxide content of 0.4% by weight or less. 17. The glass fiber according to claim 1, further comprising a Fe2O3 and an alkali metal oxide, and the glass fiber comprises a SiO2 content of 57.0 to 60.2% by weight;a weight ratio of the SiO2 content/the Al2O3 content of 2.7 to 3.1;a weight ratio of the MgO content/the CaO content of 1.0 to 1.8; anda total content of the Fe2O3 content and the alkali metal oxide content of 0.01% by weight or more and 0.4% by weight or less. 18. The glass fiber according to claim 17, comprising a Al2O3 content of 20.1 to 23.0% by weight. 19. The glass fiber according to claim 1, wherein the total content of SiO2, Al2O3, MgO and CaO is 99.7% by weight or higher based on a total weight thereof. 20. The glass fiber according to claim 1, wherein the total content of SiO2, Al2O3, MgO and CaO is 99.8% by weight or higher based on a total weight thereof. 21. The glass fiber according to claim 1, wherein the MgO content/(the SiO2 content+the MgO content+the CaO content)×100 is 11.9 or more and 19.4 or less. 22. The glass fiber according to claim 1, wherein the CaO content/(the SiO2 content+the MgO content+the CaO content)×100 is 6.59 or more and 14.0 or less. 23. The glass fiber according to claim 1, wherein the glass fiber has an elastic modulus of 96 GPa or higher. 24. The glass fiber according to claim 1, wherein the glass fiber has an elastic modulus from 97 GPa to 98 GPa.