# US 11,078,110 B2 · Glass wool, and vacuum heat insulation material using same

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- Number: US 11,078,110 B2
- Document ID: US11078110B2
- Status: Granted
- Kind: B2
- Application number: 16/333,352
- Filed: 2017-09-19
- Published: 2019-08-15
- Granted: 2021-08-03
- Earliest claimed: 2016-09-16
- Assignees: Saint-Gobain Isover
- Applicants: Saint-Gobain Isover
- Inventors: Shinji Endo
- Web page: https://patentgrep.com/patent/US11078110B2

## CPC

- C03C 13/06: Mineral fibres, e.g. slag wool, mineral wool, rock wool
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 5/022: {Non-woven fabric}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- C03B 37/04: by using centrifugal force {, e.g. spinning through radial orifices; Construction of the spinner cups therefor (bonder application C03C25/00)}
- C03C 1/002: {Use of waste materials, e.g. slags}
- C03C 3/091: containing aluminium
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- F16L 59/02: Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L 59/028: {Compositions for or methods of fixing a thermally insulating material}
- F16L 59/04: Arrangements using dry fillers, e.g. using slag wool
- F16L 59/065: using vacuum (F16L59/075 takes precedence)
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/046: Synthetic resin
- B32B 2262/101: Glass fibres
- B32B 2307/304: Insulating
- B32B 2307/31: Heat sealable
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/72: Density
- B32B 2307/732: Dimensional properties
- B32B 2419/00: Buildings or parts thereof
- B32B 2509/10: Refrigerators or refrigerating equipment
- B32B 2605/00: Vehicles
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

A glass wool which has physical properties required for a heat insulation material, can be produced industrially, can have reduced hygroscopicity, and has a novel compounding composition. The glass wool having the following glass composition: SiO2: 60.0 to 65.0% by mass inclusive, Al2O3: 0.5 to 2.0% by mass inclusive, Na2O and K2O: 13.0 to 17.0% by mass inclusive, MgO and CaO: 8.0 to 12.0% by mass inclusive, B2O3: 5.0 to 12.0% by mass inclusive, and others: a remainder.

## Claims

### Claim 1

Glass wool having the following glass composition consisting of:
SiO2: 60.0 wt % to 65.0 wt %,
Al2O3: more than 1.0 wt % to 2.0 wt %,
Na2O and K2O: 13.0 wt % to 17.0 wt %,
MgO and CaO: 8.0 wt % to 12.0 wt %,
B2O3: 5.0 wt % to 12.0 wt %, and
one or more other components: balance,
wherein the one or more other components are selected from the group consisting of S2O3, Fe2O3, MnO, BaO, TiO2, SrO, PbO, Cr2O3, ZnO, Rb2O and Cs2O.

### Claim 2 (depends on 1)

The glass wool according to claim 1, wherein the glass composition has
Al2O3: 1.2 wt % to 2.0 wt %.

### Claim 3 (depends on 1)

The glass wool according to claim 1 having the following glass composition:
Na2O and K2O: 13.0 wt % to 16.5 wt %,
MgO and CaO: 9.0 wt % to 11.5 wt %, and
B2O3: 5.0 wt % to 8.0 wt %.

### Claim 4 (depends on 1)

The glass wool according to claim 1 having the following glass composition:
SiO2: 62.0 wt % to 64.0 wt %
Al2O3: 1.2 wt % to 1.8 wt %,
Na2O: 14.0 wt % to 16.0 wt %,
K2O: 0.5 wt % to 2.0 wt %,
MgO: 2.0 wt % to 4.0 wt %,
CaO: 6.0 wt % to 8.0 wt %, and
B2O3: 6.0 wt % to 8.0 wt %.

### Claim 5 (depends on 1)

The glass wool according to claim 1, wherein equilibrium moisture content on day 7 in the case of having measured in compliance with the chamber method defined in JIS A 1475 is 1.0 wt % or less.

### Claim 6 (depends on 1)

The glass wool according to claim 1, wherein a mean filament diameter is 0.5 μm or more to 20 μm or less.

### Claim 7 (depends on 1)

The glass wool according to claim 1, which does not contain a resin binder.

### Claim 8 (depends on 1)

The glass wool according to claim 1, which is a sheet-like compact.

### Claim 9 (depends on 1)

A vacuum insulation material comprising the glass wool according to claim 1 and an envelope that encloses the glass wool.

### Claim 10 (depends on 1)

A method for producing the glass wool according to claim 1, comprising:
obtaining a glass melt by melting glass raw materials comprising cullet and an additive for adjusting glass composition, and
forming the glass melt into filaments.