Glass fiber

Patent metadata

Field	Value
Publication number	US-9227870-B2
Application number	US-201414466310-A
Country	US
Kind code	B2
Filing date	Aug 22, 2014
Priority date	Jun 8, 2010
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

There is provided a glass fiber comprising the SiO 2 content is 57.0 to 63.0% by weight; the Al 2 O 3 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 SiO 2 , Al 2 O 3 , MgO and CaO is 99.5% by weight or higher based on the total weight.

First claim

The invention claimed is:

1. A glass fiber, comprising:
a SiO 2 content of 57.0 to 60.2% by weight;
a Al 2 O 3 content of 20.1 to 23.0% by weight;
a MgO content of 10.0 to 15.0% by weight; and
a CaO content of 6.5 to 11.0% by weight, and
a total content of SiO 2 , Al 2 O 3 , MgO and CaO of 99.5% by weight or higher based on a total weight thereof,
a weight ratio of the SiO 2 content/the Al 2 O 3 content of 2.7 to 3.1, and
a weight ratio of the MgO content/the CaO content of 1.0 to 2.0.

2. The glass fiber according to claim 1 , comprising:
a total content of the SiO 2 content and the Al 2 O 3 content of 78.0 to 82.0% by weight.

3. The glass fiber according to claim 1 , comprising:
a total content of the MgO content and the CaO content of 18.0% by weight or higher.

4. The glass fiber according to claim 1 , further comprising a Fe 2 O 3 and/or an alkali metal oxide,
wherein a total content of the Fe 2 O 3 content and the alkali metal oxide content is from 0.01 to 0.4% by weight.

5. The glass fiber according to claim 1 , further comprising a Fe 2 O 3 and/or an alkali metal oxide,
wherein a total content of the Fe 2 O 3 content and the alkali metal oxide content is from 0.1 to 0.4% by weight, and a content of Fe 2 O 3 is 0.1% by weight or more and less than 0.3% by weight.

6. The glass fiber according to claim 1 , wherein the SiO 2 content is from 57.0 to 59.2% by weight.

7. The glass fiber according to claim 1 , wherein the SiO 2 content is from 57.0 to 58.2% by weight.

8. The glass fiber according to claim 1 , wherein the Al 2 O 3 content is from 20.6 to 23.0% by weight.

9. The glass fiber according to claim 1 , wherein the CaO content is from 8.5 to 9.5% by weight.

10. The glass fiber according to claim 1 , wherein the SiO 2 content is from 57.0 to 58.2% by weight, and the CaO content is from 8.5 to 9.5% by weight.

11. The glass fiber according to claim 1 , wherein
a MgO content of 11.6 to 15.0% by weight; and
a CaO content of 8.5 to 11.0% by weight.

Assignees

• Nitto Boseki Co Ltd

Inventors

• Nonaka Takashi
• Kanno Hiroshi
• Inaba Takamichi

Classifications

• C03C10/0045

  containing SiO2, Al2O3 and MgO as main constituents · CPC title

• C03C2213/00

  Glass fibres or filaments · CPC title

• C03C13/06

  Mineral fibres, e.g. slag wool, mineral wool, rock wool · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C13/006 Primary

  Glass-ceramics fibres · CPC title