# US 12,006,256 B2 · Glass compositions, fiberizable glass compositions, and glass fibers made therefrom

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- Number: US 12,006,256 B2
- Document ID: US12006256B2
- Status: Granted
- Kind: B2
- Application number: 17/357,214
- Filed: 2021-06-24
- Published: 2021-12-30
- Granted: 2024-06-11
- Earliest claimed: 2020-06-25
- Assignees: Electric Glass Fiber America, LLC
- Applicants: Electric Glass Fiber America, LLC
- Inventors: Hong Li
- Web page: https://patentgrep.com/patent/US12006256B2

## CPC

- C03C 3/095: containing rare earths
- D04H 1/4218: Glass fibres
- C03B 37/01: Manufacture of glass fibres or filaments
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/093: containing zinc or zirconium
- C03C 3/112: containing fluorine
- C03C 3/118: containing aluminium
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- C08J 5/043: {with glass fibres}
- D03D 15/267: Glass
- D04H 3/004: Glass yarns or filaments
- D10B 2101/06: Glass
- D10B 2501/04: Outerwear; Protective garments
- 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
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

Glass compositions suitable for fiber forming having rare earth oxides (RE2O3) and glass fibers having a high modulus are disclosed. The glass composition may include SiO2 from about 44.5 to about 64 weight percent, Al2O3 from about 12 to about 32 weight percent, CaO from about 0.1 to about 15.5 weight percent, MgO from about 5 to about 22 weight percent, Fe2O3 less than 1 weight percent, TiO2 less than 2 weight percent, Na2O less than 3 weight percent, Y2O3 up to 12 weight percent, CeO2 up to 6 weight percent, ZnO up to 4 weight percent, and B2O3 less than 4.5 weight percent. The glass compositions can be used to form glass fibers and incorporated into various composites.

## Claims

### Claim 1

A glass composition suitable for fiber forming comprising:
SiO2 from 44.5 to 64 weight percent;
Al2O3 from 12 to 32 weight percent;
CaO from 0.1 to 15.5 weight percent;
MgO from 5 to 22 weight percent;
Fe2O3 less than 1 weight percent;
TiO2 less than 2 weight percent;
Na2O less than 3 weight percent;
ZnO up to 4 weight percent;
Li2O less than 0.1 weight percent;
F2 is present in an amount up to 0.02 weight percent;
RE2O3 up to 12 weight percent; and
B2O3 less than 4.5 weight percent.

### Claim 2 (depends on 1)

The glass composition of claim 1, wherein RE2O3 comprises at least one of Y2O3 or CeO2.

### Claim 3 (depends on 2)

The glass composition of claim 2, wherein CeO2 is present in an amount up to 6 weight percent.

### Claim 4 (depends on 1)

The glass composition of claim 1, wherein a total (SiO2+Al2O3) content is greater than 70 weight percent.

### Claim 5 (depends on 1)

The glass composition of claim 1, wherein a ratio of Al2O3 to RO (Al2O3/RO) is less than 5, wherein RO is a total (CaO+MgO+ZnO) content.

### Claim 6 (depends on 1)

The glass composition of claim 1, wherein a total (MgO+CaO) content ranges from 6 to 24 weight percent.

### Claim 7 (depends on 1)

The glass composition of claim 1, wherein a ratio of CaO to MgO, (CaO/MgO), is less than 2.0.

### Claim 8 (depends on 1)

The glass composition of claim 1, wherein a ratio of RE2O3 to MgO (RE2O3/MgO) is less than 1.5.

### Claim 9 (depends on 1)

The glass composition of claim 1, wherein the composition is substantially free of B2O3.

### Claim 10 (depends on 1)

A plurality of glass fibers formed from the glass composition of claim 1.

### Claim 11 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a Young's modulus greater than 86 GPa.

### Claim 12 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a density less than 2.8 g/cm3.

### Claim 13 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a Specific modulus of greater than 3.2×106 m.

### Claim 14 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a Specific modulus greater than 3.40 (106 m).

### Claim 15 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers can be drawn at a fiber actual drawing temperature (TFactual) of at least 60° C. above a liquidus temperature (TL) of the glass fibers.

### Claim 16 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a liquidus temperature (TL) of less than 1380° C.

### Claim 17 (depends on 10)

The plurality of glass fibers of claim 10, wherein the glass fibers have a melting temperature (TM) of less than 1550° C.

### Claim 18 (depends on 10)

A fiber glass strand comprising the plurality of glass fibers of claim 10.

### Claim 19 (depends on 10)

A roving comprising the plurality of glass fibers of claim 10.

### Claim 20 (depends on 10)

A yarn comprising the plurality of glass fibers of claim 10.

### Claim 21 (depends on 10)

A woven fabric comprising the plurality of glass fibers of claim 10.

### Claim 22 (depends on 10)

A non-woven fabric comprising the plurality of glass fibers of claim 10.

### Claim 23 (depends on 10)

A chopped fiber glass strand comprising the plurality of glass fibers of claim 10.

### Claim 24 (depends on 1)

A polymeric composite comprising:
a polymeric material; and
a plurality of glass fibers formed from the glass composition of claim 1.

### Claim 25 (depends on 24)

The polymeric composite of claim 24, wherein the plurality of glass fibers are in the form of a non-woven fabric or a unidirectional fabric.

### Claim 26 (depends on 24)

The polymeric composite of claim 24, wherein the plurality of glass fibers are in the form of a woven fabric.

### Claim 27 (depends on 24)

The polymeric composite of claim 24, wherein the polymeric material comprises a thermoplastic polymer.

### Claim 28 (depends on 24)

The polymeric composite of claim 24, wherein the polymeric material comprises a thermosetting polymer.

### Claim 29 (depends on 1)

An article of manufacture comprising a plurality of glass fibers formed from the glass composition of claim 1.