Granted Patent B2

US 12,722,998 · App. 18/030,326 · Granted Sep 1, 2026

Inventors: Takanobu Hosokawa (Fukushima, JP); Tadashi Kurita (Fukushima, JP); Takashi Nonaka (Fukushima, JP)

Assignee: Nitto Boseki Co., Ltd.

C03C3/091C03C13/00C03C2213/00

Abstract

Claims (24)

1 . A glass composition for glass fiber comprising:

SiO 2 in a range of 59.00 to 65.00% by mass,

B 2 O 3 in a range of 16.00 to 26.00% by mass,

Al 2 O 3 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,

TiO 2 in a range of 0.10 to 5.00% by mass, and

F 2 and Cl 2 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 P 2 O 5 of less than 0.20% by mass and a total content of Na 2 O, K 2 O, and Li 2 O of less than 1.00% by mass, wherein

a ratio of a content of TiO 2 (% by mass) to a total content of CaO, MgO, and SrO (% by mass) (TiO 2 /(CaO+MgO+SrO)) is in a range of 0.66 to 4.00, and

a content SI (% by mass) of SiO 2 and a content A (% by mass) of Al 2 O 3 satisfy following formula (1):

1.00≤1000×A/SI 2 ≤4.65  (1).

2 . The glass composition for glass fiber according to claim 1 , wherein the content SI (% by mass) of SiO 2 , a content B (% by mass) of B 2 O 3 , the content A (% by mass) of Al 2 O 3 , a content C (% by mass) of CaO, a content M (% by mass) of MgO, a content SR (% by mass) of SrO, a content T (% by mass) of TiO 2 , and a total content F (% by mass) of F 2 and Cl 2 satisfy following formula (2):

204.00≤SI×B 2 ×T 2 /[{C+(40.1/87.6)×SR−(40.1/24.3)×M−F} 1/2 ×A 3 ]≤422.40   (2).

3 . The glass composition for glass fiber according to claim 1 , wherein the content SI (% by mass) of SiO 2 , a content B (% by mass) of B 2 O 3 , the content A (% by mass) of Al 2 O 3 , a content C (% by mass) of CaO, a content M (% by mass) of MgO, a content SR (% by mass) of SrO, a content T (% by mass) of TiO 2 , and a total content F (% by mass) of F 2 and Cl 2 satisfy following formula (3):

244.00≤SI×B 2 ×T 2 /[{C+(40.1/87.6)×SR−(40.1/24.3)×M−F} 1/2 ×A 3 ]≤410.00   (3).

4 . The glass composition for glass fiber according to claim 1 , wherein the content SI (% by mass) of SiO 2 , a content B (% by mass) of B 2 O 3 , the content A (% by mass) of Al 2 O 3 , a content C (% by mass) of CaO, a content M (% by mass) of MgO, a content SR (% by mass) of SrO, a content T (% by mass) of TiO 2 , and a total content F (% by mass) of F 2 and Cl 2 satisfy following formula (4):

308.50≤SI×B 2 ×T 2 /[{C+(40.1/87.6)×SR−(40.1/24.3)×M−F} 1/2 ×A 3 ]≤400.50   (4).

5 . The glass composition for glass fiber according to claim 1 , wherein the content SI (% by mass) of SiO 2 , a content B (% by mass) of B 2 O 3 , the content A (% by mass) of Al 2 O 3 , a content C (% by mass) of CaO, a content M (% by mass) of MgO, a content SR (% by mass) of SrO, a content T (% by mass) of TiO 2 , and a total content F (% by mass) of F 2 and Cl 2 satisfy following formula (5):

339.60≤SI×B 2 ×T 2 /[{C+(40.1/87.6)×SR−(40.1/24.3)×M−F} 1/2 ×A 3 ]≤377.80   (5).

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

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

8 . A glass fiber-reinforced resin composition comprising the glass fiber according to claim 6 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (23)