Glass wool, and vacuum heat insulation material using same

Patent metadata

Field	Value
Publication number	US-11078110-B2
Application number	US-201716333352-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 16, 2016
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

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: SiO 2 : 60.0 to 65.0% by mass inclusive, Al 2 O 3 : 0.5 to 2.0% by mass inclusive, Na 2 O and K 2 O: 13.0 to 17.0% by mass inclusive, MgO and CaO: 8.0 to 12.0% by mass inclusive, B 2 O 3 : 5.0 to 12.0% by mass inclusive, and others: a remainder.

First claim

The invention claimed is:

1. Glass wool having the following glass composition consisting of:
SiO 2 : 60.0 wt % to 65.0 wt %,
Al 2 O 3 : more than 1.0 wt % to 2.0 wt %,
Na 2 O and K 2 O: 13.0 wt % to 17.0 wt %,
MgO and CaO: 8.0 wt % to 12.0 wt %,
B 2 O 3 : 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 S 2 O 3 , Fe 2 O 3 , MnO, BaO, TiO 2 , SrO, PbO, Cr 2 O 3 , ZnO, Rb 2 O and Cs 2 O.

2. The glass wool according to claim 1 , wherein the glass composition has
Al 2 O 3 : 1.2 wt % to 2.0 wt %.

3. The glass wool according to claim 1 having the following glass composition:
Na 2 O and K 2 O: 13.0 wt % to 16.5 wt %,
MgO and CaO: 9.0 wt % to 11.5 wt %, and
B 2 O 3 : 5.0 wt % to 8.0 wt %.

4. The glass wool according to claim 1 having the following glass composition:
SiO 2 : 62.0 wt % to 64.0 wt %
Al 2 O 3 : 1.2 wt % to 1.8 wt %,
Na 2 O: 14.0 wt % to 16.0 wt %,
K 2 O: 0.5 wt % to 2.0 wt %,
MgO: 2.0 wt % to 4.0 wt %,
CaO: 6.0 wt % to 8.0 wt %, and
B 2 O 3 : 6.0 wt % to 8.0 wt %.

5. 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.

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

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

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

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

10. 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.

Assignees

• Saint Gobain Isover

Inventors

• Endo Shinji

Classifications

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title

• F16L59/02

  Shape or form of insulating materials, with or without coverings integral with the insulating materials · CPC title

• B32B2262/101

  Glass fibres · CPC title

• B32B2307/31

  Heat sealable · CPC title