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US 2013/0210602 A1Published application
Glass Fiber
AssigneeNitto Boseki Co., Ltd.
InventorsTakashi Nonaka, Hiroshi Kanno, Takamichi Inaba
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Abstract
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.
Claims20
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;
- and
- a CaO content of 5.5 to 11.0% by weight, and
- a 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, and
- a weight ratio of the MgO content/the CaO content of 0.8 to 2.0.
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Dependencies are inferred from the claim text.