CA2162890A1 - A mineral-fiber composition - Google Patents
A mineral-fiber compositionInfo
- Publication number
- CA2162890A1 CA2162890A1 CA002162890A CA2162890A CA2162890A1 CA 2162890 A1 CA2162890 A1 CA 2162890A1 CA 002162890 A CA002162890 A CA 002162890A CA 2162890 A CA2162890 A CA 2162890A CA 2162890 A1 CA2162890 A1 CA 2162890A1
- Authority
- CA
- Canada
- Prior art keywords
- mineral
- weight
- less
- fiber composition
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- 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
- C03C13/00—Fibre or filament compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- 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
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- 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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- 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
- C03C2213/00—Glass fibres or filaments
- C03C2213/02—Biodegradable glass fibres
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Glass Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
A biologically degradable mineral-fiber composition characterized by the following constituents in percent by weight: SiO2 50 to 65, Al2O3 less than 2, CaO 16 to 30, MgO 4 to 15, Na2O 8 to 20, K2O 0 to 2, B2O3 0 to 10, TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5.
Description
A mineral-fiber composition The present invention relates to a mineral-fiber composition that is biologically degradable.
The prior art describes some mineral-fiber compositions which are said to be biologically degradable.
The biological degradability of mineral-fiber compositions is of great importance because various studies point out that mineral fibers with very small diameters in the range of less than 3 microns are suspected to be carcinogenic, while biologically degradable mineral fibers of such dimensions show lower or no carcinogenicity.
However not only the biological degradability is of crucial importance but also the mechanical and thermal properties of the mineral fibers, or the products produced thelcfiolll, and the processibility of the mineral-fiber composition. For example mineral fibers are used to a great extent for insulation purposes. In particular for this application in the industrial area sufficient temperature stability of the mineral fibers is necessary.
Also, the mineral-fiber composition must permit processibility by known methods for producing mineral fibers with a small diameter, for example the jet process.
The invention is based on the problem of providing a novel mineral-fiber composition that is characterized by biological degradability, has good temperature stability and is easy to process:
The invention is based on the finding that this problem can be solved by a mineral-fiber composition that is built up substantially from silicon oxide, calcium oxide, magnesium oxide and sodium oxide.
It has turned out that such a mineral-fiber composition fulfills the combination of the necessary properties, namely biological degradability, temperature stability and good processibility.
The object of the invention is a mineral-fiber composition that is biologically degradable, characterized by the following constituents in percent by weight:
SiO2 50 to 65 Al2O3 less than 2 CaO 16 to 30 MgO 4 to 15 Na2O 8 to 20 K2O 0 to 2 B2O3 0 to 10 Ti2, Fe23, Cr2O3, BaO, MnO, P2Os 0 to 5 The inventive mineral-fiber compositions are drawable by the jet process or the rotary process. The obtained fibers have good temperature stability. Surprisingly enough, the mineral-fiber compositions show biological degradability. The mean fiber diameter is preferably 10 microns or less, and especially between 2.5 and 5 microns.
The inventive mineral-fiber compositions preferably have the following constituents in percent by weight:
SiO2 55 to 60 A12O3 less than 1.5 CaO 16 to 25 MgO 5 to 15 Na2O 9 to 15 K20 less than 2 B2O3 0 to 8 TiO2~ Fe23, Cr2O3, BaO, MnO, P2Os 0 to 5 In particular, the inventive mineral-fiber compositions have the following constituents in percènt by weight:
The prior art describes some mineral-fiber compositions which are said to be biologically degradable.
The biological degradability of mineral-fiber compositions is of great importance because various studies point out that mineral fibers with very small diameters in the range of less than 3 microns are suspected to be carcinogenic, while biologically degradable mineral fibers of such dimensions show lower or no carcinogenicity.
However not only the biological degradability is of crucial importance but also the mechanical and thermal properties of the mineral fibers, or the products produced thelcfiolll, and the processibility of the mineral-fiber composition. For example mineral fibers are used to a great extent for insulation purposes. In particular for this application in the industrial area sufficient temperature stability of the mineral fibers is necessary.
Also, the mineral-fiber composition must permit processibility by known methods for producing mineral fibers with a small diameter, for example the jet process.
The invention is based on the problem of providing a novel mineral-fiber composition that is characterized by biological degradability, has good temperature stability and is easy to process:
The invention is based on the finding that this problem can be solved by a mineral-fiber composition that is built up substantially from silicon oxide, calcium oxide, magnesium oxide and sodium oxide.
It has turned out that such a mineral-fiber composition fulfills the combination of the necessary properties, namely biological degradability, temperature stability and good processibility.
The object of the invention is a mineral-fiber composition that is biologically degradable, characterized by the following constituents in percent by weight:
SiO2 50 to 65 Al2O3 less than 2 CaO 16 to 30 MgO 4 to 15 Na2O 8 to 20 K2O 0 to 2 B2O3 0 to 10 Ti2, Fe23, Cr2O3, BaO, MnO, P2Os 0 to 5 The inventive mineral-fiber compositions are drawable by the jet process or the rotary process. The obtained fibers have good temperature stability. Surprisingly enough, the mineral-fiber compositions show biological degradability. The mean fiber diameter is preferably 10 microns or less, and especially between 2.5 and 5 microns.
The inventive mineral-fiber compositions preferably have the following constituents in percent by weight:
SiO2 55 to 60 A12O3 less than 1.5 CaO 16 to 25 MgO 5 to 15 Na2O 9 to 15 K20 less than 2 B2O3 0 to 8 TiO2~ Fe23, Cr2O3, BaO, MnO, P2Os 0 to 5 In particular, the inventive mineral-fiber compositions have the following constituents in percènt by weight:
SiO2 55 to59 A12O3 less than 1.5 CaO 18 to 23 MgO 8 to 12 Na2O 9 to 13 K2O less than 1 B2O3 0 to 3 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2Os 0 to 3 The content of magnesium oxide is preferably 6 to 12 percent by weight and in particular 8 to 12 percent by weight.
The content of chromium oxide is preferably less than 1.5 percent by weight and in particular less than 1.0 percent by weight.
The content of boron oxide is preferably less than 4 percent by weight.
To assess biological degradability the standard powder test of the German Glass Society was used. This is an easily con~ cte~ method and gives a sufficient measure of biological degradability. The method is described in L.
Springer, "Laboratoriumsbuch fur die Glasindustrie", 3rd edition, 1950, Halle/S: W. Knapp Verlag.
The temperature behavior of the mineral fibers was determined by the Swedish method. In this method a silit tube furnace is used with a horizontal working tube open on both sides having a length of 350 mm and an inside diameter of 27 mm. In the center of the furnace there is a small ceramic supporting plate (30 X 20 X 3 mm) for holding the test sample. The test sample has dimensions of 12 X 12 X 12 mm or 12 mm C X 12 mm height. The bulk density is normally 100 kg/m3. The lelllpelature increase is 5 K/min. The change in test sample height is determined continuously with a reading optic.
The invention shall be described in more detail in the following with reference to examples.
The content of chromium oxide is preferably less than 1.5 percent by weight and in particular less than 1.0 percent by weight.
The content of boron oxide is preferably less than 4 percent by weight.
To assess biological degradability the standard powder test of the German Glass Society was used. This is an easily con~ cte~ method and gives a sufficient measure of biological degradability. The method is described in L.
Springer, "Laboratoriumsbuch fur die Glasindustrie", 3rd edition, 1950, Halle/S: W. Knapp Verlag.
The temperature behavior of the mineral fibers was determined by the Swedish method. In this method a silit tube furnace is used with a horizontal working tube open on both sides having a length of 350 mm and an inside diameter of 27 mm. In the center of the furnace there is a small ceramic supporting plate (30 X 20 X 3 mm) for holding the test sample. The test sample has dimensions of 12 X 12 X 12 mm or 12 mm C X 12 mm height. The bulk density is normally 100 kg/m3. The lelllpelature increase is 5 K/min. The change in test sample height is determined continuously with a reading optic.
The invention shall be described in more detail in the following with reference to examples.
Example 1 A mineral wool of the following composition in percent by weight was produced:
SiO2 56 CaO 20 - MgO 10 Na20 10 B2O3 - 2.7 This composition could be processed well to mineral fibers with a mean m~ter of 2.5 microns by the jet process at a drawing temperature of 1330C.
An investigation according to the standard powder test of the German Glass Society yielded a value of 35 mg/kg and thus a value for high biological degradability.
Determination of temperature behavior by the Swedish method yielded a temperature stability at 5% reduction in height of 620C, which can be clearly seen from the corresponding diagram shown by way of example in the single drawing.
Example 2 A mineral wool with the following composition in percent by weight was produced:
SiO2 56 CaO 20 - MgO 10 Na20 10 B2O3 - 2.7 This composition could be processed well to mineral fibers with a mean m~ter of 2.5 microns by the jet process at a drawing temperature of 1330C.
An investigation according to the standard powder test of the German Glass Society yielded a value of 35 mg/kg and thus a value for high biological degradability.
Determination of temperature behavior by the Swedish method yielded a temperature stability at 5% reduction in height of 620C, which can be clearly seen from the corresponding diagram shown by way of example in the single drawing.
Example 2 A mineral wool with the following composition in percent by weight was produced:
-% by weight Mole %
SiO2 56 52.75 Al2O3 1.0 0.55 CaO 21 21.20 MgO 11 15.45 Na2O 11 10.05 This composition could be processed well to mineral fibers with a mean diameter of 2.7 microns by the jet process at a drawing temperature of 1310C.
An investigation according to the standard powder test of the German Glass Society yielded a value of 37 mg/kg and thus a value for high biological degradability.
Determination of temperature behavior by the Swedish method yielded a temperature stability at 5% reduction in height of 600C.
SiO2 56 52.75 Al2O3 1.0 0.55 CaO 21 21.20 MgO 11 15.45 Na2O 11 10.05 This composition could be processed well to mineral fibers with a mean diameter of 2.7 microns by the jet process at a drawing temperature of 1310C.
An investigation according to the standard powder test of the German Glass Society yielded a value of 37 mg/kg and thus a value for high biological degradability.
Determination of temperature behavior by the Swedish method yielded a temperature stability at 5% reduction in height of 600C.
Claims (4)
1. A mineral-fiber composition that is biologically degradable, characterized by the following constituents in percent by weight:
SiO2 50 to 65 Al2O3 less than 2 CaO 16 to 30 MgO 4 to 15 Na2O 8 to 20 K2O 0 to 2 B2O3 0 to 10 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5
SiO2 50 to 65 Al2O3 less than 2 CaO 16 to 30 MgO 4 to 15 Na2O 8 to 20 K2O 0 to 2 B2O3 0 to 10 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5
2. The mineral-fiber composition of claim 1, characterized by the following constituents in percent by weight:
SiO2 55 to 60 Al2O3 less than 1.5 CaO 16 to 25 MgO 5 to 15 Na2O 9 to 15 K2O less than 2 B2O3 0 to 8 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5
SiO2 55 to 60 Al2O3 less than 1.5 CaO 16 to 25 MgO 5 to 15 Na2O 9 to 15 K2O less than 2 B2O3 0 to 8 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 5
3. The mineral-fiber composition of claim 1, characterized by the following constituents in percent by weight:
SiO2 55 to 59 Al2O3 less than 1.5 CaO 18 to 23 MgO 8 to 12 Na2O 9 to 13 K2O less than 1 B2O3 0 to 3 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 3
SiO2 55 to 59 Al2O3 less than 1.5 CaO 18 to 23 MgO 8 to 12 Na2O 9 to 13 K2O less than 1 B2O3 0 to 3 TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 0 to 3
4. The mineral-fiber composition of any of claims 1 to 3, characterized in that the content of boron oxide is less than 4 percent by weight.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4417231.1 | 1994-05-17 | ||
| DE4417231A DE4417231C3 (en) | 1994-05-17 | 1994-05-17 | Use of a composition as a material for biodegradable mineral fibers |
| DE19503172.5 | 1995-02-01 | ||
| DE1995103172 DE19503172A1 (en) | 1995-02-01 | 1995-02-01 | Biologically degradable mineral fibre composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2162890A1 true CA2162890A1 (en) | 1995-11-23 |
Family
ID=25936642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002162890A Abandoned CA2162890A1 (en) | 1994-05-17 | 1995-05-16 | A mineral-fiber composition |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0714381A1 (en) |
| JP (1) | JPH08511761A (en) |
| KR (1) | KR960703815A (en) |
| CN (1) | CN1128529A (en) |
| AU (1) | AU2612995A (en) |
| BR (1) | BR9506227A (en) |
| CA (1) | CA2162890A1 (en) |
| CZ (1) | CZ312095A3 (en) |
| FI (1) | FI955417A (en) |
| HU (1) | HU9600085D0 (en) |
| IS (1) | IS4283A (en) |
| NO (1) | NO960190L (en) |
| PL (1) | PL312575A1 (en) |
| SK (1) | SK149695A3 (en) |
| WO (1) | WO1995031411A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HRP950325A2 (en) * | 1994-06-19 | 1997-08-31 | Saint Gobain Isover | Mineral-fiber compositions |
| GB9508683D0 (en) * | 1994-08-02 | 1995-06-14 | Morgan Crucible Co | Inorganic fibres |
| HRP950332A2 (en) * | 1994-08-02 | 1997-04-30 | Saint Gobain Isover | Mineral-fiber composition |
| US6077798A (en) * | 1996-08-02 | 2000-06-20 | Owens Corning Fiberglas Technology, Inc. | Biosoluble, high temperature mineral wools |
| US5932347A (en) * | 1996-10-31 | 1999-08-03 | Owens Corning Fiberglas Technology, Inc. | Mineral fiber compositions |
| KR100460526B1 (en) * | 2002-03-07 | 2004-12-08 | 이 흥 권 | High functional composition having action on minus ion and far infrared ray |
| KR100789469B1 (en) * | 2004-04-29 | 2007-12-31 | 주식회사 케이씨씨 | Composition of biosoluble glass fiber |
| FR2883865B1 (en) * | 2005-04-01 | 2007-05-18 | Saint Gobain Isover Sa | MINERAL WOOL, INSULATING PRODUCT AND PROCESS FOR PRODUCING THE SAME |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3765789A (en) * | 1988-06-01 | 1990-01-05 | Manville Sales Corporation | Process for decomposing an inorganic fiber |
| FI93346C (en) * | 1990-11-23 | 1998-03-07 | Partek Ab | Mineral Fiber Composition |
| FR2690438A1 (en) * | 1992-04-23 | 1993-10-29 | Saint Gobain Isover | Mineral fibers capable of dissolving in a physiological medium. |
-
1995
- 1995-05-08 IS IS4283A patent/IS4283A/en unknown
- 1995-05-16 CZ CZ953120A patent/CZ312095A3/en unknown
- 1995-05-16 BR BR9506227A patent/BR9506227A/en not_active Application Discontinuation
- 1995-05-16 CN CN95190437A patent/CN1128529A/en active Pending
- 1995-05-16 SK SK1496-95A patent/SK149695A3/en unknown
- 1995-05-16 KR KR1019960700200A patent/KR960703815A/en not_active Application Discontinuation
- 1995-05-16 JP JP7529367A patent/JPH08511761A/en active Pending
- 1995-05-16 PL PL95312575A patent/PL312575A1/en unknown
- 1995-05-16 EP EP95920813A patent/EP0714381A1/en not_active Ceased
- 1995-05-16 WO PCT/EP1995/001843 patent/WO1995031411A1/en not_active Application Discontinuation
- 1995-05-16 AU AU26129/95A patent/AU2612995A/en not_active Abandoned
- 1995-05-16 CA CA002162890A patent/CA2162890A1/en not_active Abandoned
- 1995-05-16 HU HU9600085A patent/HU9600085D0/en unknown
- 1995-11-10 FI FI955417A patent/FI955417A/en not_active Application Discontinuation
-
1996
- 1996-01-16 NO NO960190A patent/NO960190L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SK149695A3 (en) | 1996-04-03 |
| BR9506227A (en) | 1997-08-12 |
| FI955417A (en) | 1995-11-18 |
| AU2612995A (en) | 1995-12-05 |
| HU9600085D0 (en) | 1996-03-28 |
| PL312575A1 (en) | 1996-04-29 |
| JPH08511761A (en) | 1996-12-10 |
| EP0714381A1 (en) | 1996-06-05 |
| NO960190D0 (en) | 1996-01-16 |
| CZ312095A3 (en) | 1997-04-16 |
| NO960190L (en) | 1996-01-16 |
| CN1128529A (en) | 1996-08-07 |
| KR960703815A (en) | 1996-08-31 |
| WO1995031411A1 (en) | 1995-11-23 |
| FI955417A0 (en) | 1995-11-10 |
| IS4283A (en) | 1995-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |