Glass composition for glass fiber, glass fiber, glass fiber fabric, and glass fiber-reinforced resin composition
AssigneeNitto Boseki Co., Ltd.
InventorsTakanobu Hosokawa, Tadashi Kurita, Takashi Nonaka
Life of this patent
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Abstract
A glass composition includes 59.00 to 65.00% by mass of SiO2, 16.00 to 26.00% by mass of B2O3, 7.00 to 14.00% by mass of Al2O3, 0 to 5.00% by mass of CaO, 0 to 4.00% by mass of MgO, 0 to 6.00% by mass of SrO, 0.10 to 5.00% by mass of TiO2, 0 to 2.00% by mass of F2 and Cl2 in total, less than 0.20% by mass of P2O5, and less than 1.00% by mass of Na2O, K2O and Li2O in total, wherein the ratio of TiO2 to the total content of CaO, MgO, and SrO (TiO2/(CaO+MgO+SrO)) is from 0.66 to 4.00, and the content SI of SiO2 and the content A of Al2O3 satisfy the following formula (1): 1.00≤1000×A/SI2≤4.65 (1).
Claims8
A glass composition for glass fiber comprising:
- SiO2 in a range of 59.00 to 65.00% by mass,
- B2O3 in a range of 16.00 to 26.00% by mass,
- Al2O3 in a range of 7.00 to 14.00 11.80% by mass,
- CaO in a range of 0 to 5.00% by mass,
- MgO in a range of 0 to 4.00% by mass,
- SrO in a range of 0 to 6.00% by mass,
- TiO2 in a range of 0.10 to 5.00% by mass, and
- F2 and Cl2 in a range of 0 to 2.00% by mass in total, with respect to the total amount of the glass composition for glass fiber, and
- having a content of P2O5 of less than 0.20% by mass and a total content of Na2O, K2O, and Li2O of less than 1.00% by mass, wherein
- a ratio of a content of TiO2 (% by mass) to a total content of CaO, MgO, and SrO (% by mass) (TiO2/(CaO+MgO+SrO)) is in a range of 0.66 to 4.00, and
- a content SI (% by mass) of SiO2 and a content A (% by mass) of Al2O3 satisfy following formula (1):
- 1.00≤1000×A/SI2≤4.65 (1).
Dependencies are inferred from the claim text.