# US 11,078,109 B2 · Glass fiber composition, glass fiber and composite material thereof

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- Number: US 11,078,109 B2
- Document ID: US11078109B2
- Status: Granted
- Kind: B2
- Application number: 16/309,611
- Filed: 2018-08-24
- Published: 2020-07-16
- Granted: 2021-08-03
- Earliest claimed: 2018-06-22
- Assignees: Jushi Group Co., Ltd.
- Applicants: Jushi Group Co., Ltd.
- Inventors: Guorong Cao; Wenzhong Xing; Lin Zhang; Guijiang Gu
- Web page: https://patentgrep.com/patent/US11078109B2

## CPC

- C03C 3/118: containing aluminium
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- C03B 37/01: Manufacture of glass fibres or filaments
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/112: containing fluorine
- C03B 37/022: from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres {, undulated fibres, fibres presenting a rough surface (C03B37/025 takes precedence)}
- C03C 2213/00: Glass fibres or filaments
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES

## Abstract

A composition for producing a glass fiber, including the following components with corresponding percentage amounts by weight: 54.2-64% SiO2, 11-18% Al2O3, 20-25.5% CaO, 0.3-3.9% MgO, 0.1-2% of Na2O+K2O, 0.1-1.5% TiO2, and 0.1-1% total iron oxides including ferrous oxide (calculated as FeO). The weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53. The total content of the above components in the composition is greater than 97%. The invention also provides a glass fiber produced using the composition and a composite material including the glass fiber.

## Claims

### Claim 1

A composition for producing a glass fiber, comprising the following components with corresponding percentage amounts by weight:
SiO2
54.2-64%
Al2O3
11-18%
CaO
20-25.5%
MgO
0.3-3.9%
Na2O + K2O
0.1-2%
TiO2
0.1-1.5%
Total iron oxides
0.1-1%
wherein
the total content of the components listed above is greater than 97%;
the iron oxides include ferrous oxide (calculated as FeO);
a weight percentage of FeO is greater than or equal to 0.10%;
a weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53; and
a weight percentage ratio C2=(FeO+CaO−MgO)/SiO2 is greater than 0.33.

### Claim 2 (depends on 1)

The composition of claim 1, comprising 13.6-15 wt. % of Al2O3.

### Claim 3 (depends on 1)

The composition of claim 1, further comprising less than 0.4 wt. % of Li2O.

### Claim 4 (depends on 1)

The composition of claim 1, further comprising 0.15-0.65 wt. % of F2.

### Claim 5 (depends on 1)

The composition of claim 1, comprising 59-64 wt. % of SiO2.

### Claim 6 (depends on 1)

The composition of claim 1, being basically free of B2O3.

### Claim 7 (depends on 1)

The composition of claim 1, being basically free of P2O5.

### Claim 8 (depends on 1)

The composition of claim 1, being basically free of Li2O.

### Claim 9 (depends on 1)

The composition of claim 1, comprising the following components with corresponding percentage amounts by weight:
SiO2
57-62%
Al2O3
12-17%
CaO + MgO
21-26.5%
CaO
20.5-25%
MgO
0.3-2.7%
Na2O + K2O
0.2-2%
Na2O
0.1-1.2%
K2O
0.1-1.2%
TiO2
0.1-1.5%
Total iron oxides
0.1-0.8%
wherein
the combined weight percentage of the components listed above is greater than 99%;
the iron oxides include ferrous oxide (calculated as FeO);
a weight percentage of FeO is greater than or equal to 0.10%;
a weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53;
a weight percentage ratio C2=(FeO+CaO−MgO)/SiO2 is greater than 0.33; and
the composition is basically free of B2O3.

### Claim 10 (depends on 1)

The composition of claim 1, comprising the following components with corresponding percentage amounts by weight:
SiO2
57.5-61%
Al2O3
13-15.5%
CaO
21-24.5%
MgO
>0.4% and <1%
Na2O + K2O
0.1-2%
TiO2
0.1-1.2%
Total iron oxides
0.1-0.8%
wherein
the combined weight percentage of the components listed above is greater than or equal to 99.2%;
the iron oxides include ferrous oxide (calculated as FeO);
a weight percentage of FeO is greater than or equal to 0.10%;
a weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53; and
a weight percentage ratio C2=(FeO+CaO−MgO)/SiO2 is greater than 0.33.

### Claim 11 (depends on 1)

The composition of claim 1, comprising the following components with corresponding percentage amounts by weight:
SiO2
57.5-61%
Al2O3
13-15.5%
CaO
21-24.5%
MgO
>0.4% and <1%
Na2O + K2O
0.1-2%
TiO2
0.1-1.2%
Total iron oxides
0.1-0.8%
wherein
the combined weight percentage of the components listed above is greater than 99%;
the iron oxides include ferrous oxide (calculated as FeO);
a weight percentage of FeO is greater than or equal to 0.10%;
a weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53;
a weight percentage ratio C2=(FeO+CaO−MgO)/SiO2 is greater than 0.33; and
the composition is basically free of B2O3.

### Claim 12 (depends on 1)

The composition of claim 1, wherein the combined weight percentage of SiO2, Al2O3, CaO, MgO, Na2O, K2O, TiO2 and iron oxides is greater than 99%.

### Claim 13 (depends on 1)

The composition of claim 1, wherein a weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.66.

### Claim 14 (depends on 1)

The composition of claim 1, wherein a weight percentage ratio Na2O/K2O is greater than 0.65.

### Claim 15 (depends on 1)

The composition of claim 1, being produced using glass batch materials with a chemical oxygen demand (COD) value of 500-1200 ppm.

### Claim 16 (depends on 1)

The composition of claim 1, being produced using glass batch materials with a SO3/COD ratio of 2-10;
wherein COD refers to chemical oxygen demand.

### Claim 17 (depends on 1)

A glass fiber, being produced using the composition of claim 1.

### Claim 18 (depends on 17)

A composite material, comprising the glass fiber of claim 17.