Glass composition for glass fibers, glass fibers, glass fiber fabric, and glass fiber-reinforced resin composition

Patent metadata

Field	Value
Publication number	US-11565967-B2
Application number	US-202017623068-A
Country	US
Kind code	B2
Filing date	Dec 24, 2020
Priority date	Apr 10, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A glass composition for glass fiber includes SiO2 in the range of 52.0% by mass or more and 56.0% by mass or less; B2O3 in the range of 21.0% by mass or more and 24.5% by mass or less; Al2O3 in the range of 9.5% by mass or more and 13.0% by mass or less; MgO in the range of 0% by mass or more and less than 1.0% by mass; CaO in the range of 0.5% by mass or more and 5.5% by mass or less; SrO in the range of 0.5% by mass or more and 6.0% by mass or less; and TiO2 in the range of 0.1% by mass or more and 3.0% by mass or less; and includes F2 and Cl2 in the range of 0.1% by mass or more and 2.0% by mass or less in total, with respect to the total amount.

First claim

The invention claimed is:

1. A glass composition for glass fiber comprising:
SiO 2 in a range of 52.0% by mass or more and 56.0% by mass or less;
B 2 O 3 in a range of 21.0% by mass or more and 24.5% by mass or less;
Al 2 O 3 in a range of 9.5% by mass or more and 13.0% by mass or less;
MgO in a range of 0% by mass or more and less than 1.0% by mass;
CaO in a range of 0.5% by mass or more and 4.8% by mass or less;
SrO in a range of 0.5% by mass or more and 6.0% by mass or less;
ZrO in a range of 0.0% by mass or more and 0.5% by mass or less; and
TiO 2 in a range of 0.1% by mass or more and 3.0% by mass or less; and comprising
at least one of F 2 and Cl 2 , wherein a collective amount of F 2 and Cl 2 is in a range of 0.1% by mass or more and 2.0% by mass or less.

2. The glass composition for glass fiber according to claim 1 , wherein a content M (% by mass) of MgO, a content C (% by mass) of CaO, a content S (% by mass) of SrO, and a content T (% by mass) of TiO 2 satisfy following formula (1):
0.60 ≤S 3/2 /{( M+S+T )× C 1/2 }≤1.07  (1).

3. The glass composition for glass fiber according to claim 2 , wherein the M, C, S, and T satisfy following formula (2):
0.66 ≤S 3/2 /{( M+S+T )× C 1/2 }≤1.07  (2).

4. The glass composition for glass fiber according to claim 3 , wherein the M, C, S, and T satisfy following formula (3):
0.66 ≤S 3/2 /{( M+S+T )× C 1/2 }≤0.78  (3).

5. Glass fiber formed from the glass composition for glass fiber according to claim 1 .

6. A glass fiber woven fabric comprising the glass fiber according to claim 5 .

7. A glass fiber-reinforced resin composition comprising the glass fiber according to claim 5 .

Assignees

• Nitto Boseki Co Ltd

Inventors

• URUSHIZAKI Masaru
• Hosokawa Takanobu
• Nonaka Takashi

Classifications

• C03C13/045

  Silica-containing oxide glass compositions · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C3/118

  containing aluminium · CPC title

• C03C13/00 Primary

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title

• D03D15/267

  Glass · CPC title