WO1996030314A1 - A mineral fiber composition - Google Patents
A mineral fiber composition Download PDFInfo
- Publication number
- WO1996030314A1 WO1996030314A1 PCT/EP1996/001181 EP9601181W WO9630314A1 WO 1996030314 A1 WO1996030314 A1 WO 1996030314A1 EP 9601181 W EP9601181 W EP 9601181W WO 9630314 A1 WO9630314 A1 WO 9630314A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mineral fiber
- mineral
- fiber composition
- cao
- mgo
- Prior art date
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
- 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
- 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
- C03C2213/00—Glass fibres or filaments
- C03C2213/02—Biodegradable glass fibres
Definitions
- This invention relates to a mineral fiber composition which is biodegradable.
- Biodegradability of mineral fiber compositions is of great importance since various studies indicate that mineral fibers with very small diameters in the range of less than 3 microns are suspected to be carcinogenic, while biodegradable mineral fibers with such dimensions show no carcinogenicity.
- mineral fiber compositions must also have good workability by known methods for producing mineral wool with a small diameter, in particular the jet process. This in ⁇ volves in particular a sufficient processing range of for ex ⁇ ample 80°C and suitable viscosity of the glass melt.
- the mechanical and thermal properties of mineral fibers, or the products made therefrom, are also of crucial impor ⁇ tance.
- Mineral fibers are used for example for insulating purposes to a great extent. Sufficient temperature resistance of the mineral fibers is necessary in particular for use in the industrial sector.
- the problem of the invention is to provide a novel min ⁇ eral fiber composition which is distinguished by biodegrad ⁇ ability, has good temperature resistance and can be processed well.
- the invention is based on the finding that this problem can be solved by a mineral fiber composition which consists substantially of silicon dioxide and alkaline-earth oxides, and further contains substantially potassium oxide as a melt ⁇ ing accelerator and a considerable proportion of aluminum ox- ide for increasing temperature resistance.
- Such mineral fiber compositions fulfill the combination of necessary properties, namely bio- degradability, sufficient temperature resistance for insula ⁇ tion objects in industry, as well as good workability in the production of the mineral wool as such and the products.
- the upper devitrification tempera ⁇ ture of the melt is preferably under 1320°C.
- the mean fiber diameter is preferably 3 microns or less.
- the inventive glass fiber compositions have considerable amounts of potassium oxide but only small amounts of sodium oxide.
- the presence of potassium oxide produces a clear in ⁇ crease in glass viscosity and improves temperature resistance by around 40 to 50°C as compared to sodium-containing glass.
- the subject of the invention is a mineral fiber composi ⁇ tion which is biodegradable, characterized by the following constituents in percent by weight:
- inventive mineral fiber compositions are readily drawable in particular by the jet process, i.e. one obtains a fine, low-shot mineral wool.
- the mineral wool reaches a high temperature resistance of at least 740°C and shows good biodegradability.
- the inventive mineral fiber compositions can preferably be melted in melting chambers fueled with fossile fuels, in particular natural gas, at melting temperatures from 1350 to 1450°C.
- Such melting chambers can produce a homogeneous melt, which is a prerequisite for constant product quality. Homoge ⁇ neity of the glass melt also facilitates the reproducibility of the fiberizing process and thus of the thermal and me ⁇ chanical product properties. Furthermore, the constant chemi ⁇ cal composition of the thus produced mineral wool leads to controllable biodegradability.
- inventive mineral fiber compositions preferably have the following constituents in percent by weight:
- Mineral fiber compositions are especially preferred with the following constituents in percent by weight: Si0 2 52 to 57
- the thermal behavior of the mineral fibers was deter ⁇ mined by the so-called "Swedish method".
- This method uses a silit pipe furnace with a horizontal working pipe open on both sides with a length of 350 mm and an inside diameter of 27 mm.
- a ceramic sup ⁇ porting plate with dimensions of 30 x 20 x 3 mm for position ⁇ ing the test sample.
- the test sample has dimensions of 12 x 12 x 12 mm or 12 mm 0 x 12 mm height.
- the gross density is normally 100 kg/m 3 .
- the temperature increase is 5 K/min.
- the change in test sample height is determined continuously with a reading optic.
- a mineral wool was produced with the following composi ⁇ tion in percent by weight:
- This composition could be readily fiberized by the jet process at a drawing temperature between 1340 and 1400°C into mineral fibers with a mean diameter of 2.0 to 10 microns.
- a mineral wool was produced with the following composi ⁇ tion in percent by weight: Si0 2 53.4
- This composition could be readily processed by the jet process at a drawing temperature between 1340 and 1400°C into mineral fibers with a mean diameter of 2.0 to 10 microns.
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)
Abstract
A biodegradable mineral fiber composition, characterized by the following constituents in percent by weight: SiO2 45 to 60; Al2O3 0 to 3; CaO 20 to 40; MgO 3 to 15; Na2O 0 to 2; K2O 1 to 10; Na2O + K2O 1 to 12; TiO2 0 to 3; Fe2O3 0 to 3; others 0 to 5.
Description
A mineral fiber composition
This invention relates to a mineral fiber composition which is biodegradable.
The prior art describes some mineral fiber compositions which are said to be biodegradable.
Biodegradability of mineral fiber compositions is of great importance since various studies indicate that mineral fibers with very small diameters in the range of less than 3 microns are suspected to be carcinogenic, while biodegradable mineral fibers with such dimensions show no carcinogenicity.
However, mineral fiber compositions must also have good workability by known methods for producing mineral wool with a small diameter, in particular the jet process. This in¬ volves in particular a sufficient processing range of for ex¬ ample 80°C and suitable viscosity of the glass melt.
The mechanical and thermal properties of mineral fibers, or the products made therefrom, are also of crucial impor¬ tance. Mineral fibers are used for example for insulating purposes to a great extent. Sufficient temperature resistance of the mineral fibers is necessary in particular for use in the industrial sector.
The problem of the invention is to provide a novel min¬ eral fiber composition which is distinguished by biodegrad¬ ability, has good temperature resistance and can be processed well.
The invention is based on the finding that this problem can be solved by a mineral fiber composition which consists substantially of silicon dioxide and alkaline-earth oxides, and further contains substantially potassium oxide as a melt¬ ing accelerator and a considerable proportion of aluminum ox-
ide for increasing temperature resistance.
It has turned out that such mineral fiber compositions fulfill the combination of necessary properties, namely bio- degradability, sufficient temperature resistance for insula¬ tion objects in industry, as well as good workability in the production of the mineral wool as such and the products. This simultaneously means that the upper devitrification tempera¬ ture of the melt is preferably under 1320°C. The mean fiber diameter is preferably 3 microns or less.
The inventive glass fiber compositions have considerable amounts of potassium oxide but only small amounts of sodium oxide. The presence of potassium oxide produces a clear in¬ crease in glass viscosity and improves temperature resistance by around 40 to 50°C as compared to sodium-containing glass.
The subject of the invention is a mineral fiber composi¬ tion which is biodegradable, characterized by the following constituents in percent by weight:
Si02 45 to 60
Al203 0 to 3
CaO 20 to 40
MgO 3 to 15
Na20 0 to 2
K20 1 to 10
Na20 + K20 1 to 12
Ti02 0 to 3
Fe203 0 to 3
Others 0 to 5.
The inventive mineral fiber compositions are readily drawable in particular by the jet process, i.e. one obtains a
fine, low-shot mineral wool.
The mineral wool reaches a high temperature resistance of at least 740°C and shows good biodegradability.
The inventive mineral fiber compositions can preferably be melted in melting chambers fueled with fossile fuels, in particular natural gas, at melting temperatures from 1350 to 1450°C. Such melting chambers can produce a homogeneous melt, which is a prerequisite for constant product quality. Homoge¬ neity of the glass melt also facilitates the reproducibility of the fiberizing process and thus of the thermal and me¬ chanical product properties. Furthermore, the constant chemi¬ cal composition of the thus produced mineral wool leads to controllable biodegradability.
In particular the addition of aluminum oxide increases the temperature resistance of the mineral wool.
The inventive mineral fiber compositions preferably have the following constituents in percent by weight:
Si02 50 to 58
A1203 0.2 to 2.5
CaO 25 to 35
MgO 5 to 10
Na20 < 1
K20 2 to 8
Na 0 + K20 2 to 8
Ti02 0 to 1
Fe203 0 to 1
Others 0 to 5.
Mineral fiber compositions are especially preferred with the following constituents in percent by weight:
Si02 52 to 57
A1203 < 2
CaO 28 to 34
MgO 6 to 9
Na20 < 1
K20 2 to 6
Na20 + K20 2 to 6
Ti02 0 to 1
Fe203 0 to 1
Others 0 to 5.
For assessment of biodegradability the standard powder test of the Deutsche Glasgesellschaft was used. This is an easily performed method and gives a sufficient measure of biodegradability. The method is described in L. Springer, "Laboratoriumsbuch f r die Glasindustrie", 3rd ed. 1950, Halle/S, W. Knapp Verlag.
The thermal behavior of the mineral fibers was deter¬ mined by the so-called "Swedish method". This method uses a silit pipe furnace with a horizontal working pipe open on both sides with a length of 350 mm and an inside diameter of 27 mm. In the center of the furnace there is a ceramic sup¬ porting plate with dimensions of 30 x 20 x 3 mm for position¬ ing the test sample. The test sample has dimensions of 12 x 12 x 12 mm or 12 mm 0 x 12 mm height. The gross density is normally 100 kg/m3. The temperature increase is 5 K/min. The change in test sample height is determined continuously with a reading optic.
The invention will be described more closely in the fol¬ lowing using examples.
Example 1
A mineral wool was produced with the following composi¬ tion in percent by weight:
Si02 55.6
A1203 0.4
Fe203 0.5
CaO 30.5
MgO 7.0
Na20 0.2
K20 5.6
This composition could be readily fiberized by the jet process at a drawing temperature between 1340 and 1400°C into mineral fibers with a mean diameter of 2.0 to 10 microns.
An investigation by the standard powder test of the Deutsche Glasgesellschaft yielded a value of 40 mg/kg and thus a value for high biodegradability.
Determination of thermal behavior by the "Swedish method" yielded a temperature resistance of 740°C with 5% height reduction.
Example 2
A mineral wool was produced with the following composi¬ tion in percent by weight:
Si02 53.4
A1203 2.0
Fe203 0.3
CaO 32.4
MgO 8.2
Na20 0.4
K20 2.6
This composition could be readily processed by the jet process at a drawing temperature between 1340 and 1400°C into mineral fibers with a mean diameter of 2.0 to 10 microns.
An investigation by the standard powder test of the Deutsche Glasgesellschaft yielded a value of 48 mg/kg and thus a value for high biodegradability.
Determination of thermal behavior by the "Swedish method" yielded a temperature resistance of 750°C with 5% height reduction.
Claims
1. A mineral fiber composition which is biodegradable, characterized by the following constituents in percent by weight :
Si02 45 to 60
A1203 0 to 3
CaO 20 to 40
MgO 3 to 15
Na20 0 to 2
K20 1 to 10
Na20 + K20 1 to 12
Ti02 0 to 3
Fe203 0 to 3
Others 0 to 5.
2. The mineral fiber composition of claim 1, character¬ ized by the following constituents in percent by weight :
Si02 50 to 58
A1203 0.2 to 2.5
CaO 25 to 35
MgO 5 to 10
Na20 < 1
K20 2 to 8
Na 0 + K20 2 to 8 Ti02 0 to 1 Fe203 0 to 1
Others 0 to 5.
3. The mineral fiber composition of claim 1 or 2, char¬ acterized by the following constituents in percent by weight
Si02 52 to 57
A1203 < 2
CaO 28 to 34
MgO 6 to 9
Na20 < 1
K20 2 to 6
Na 0 + K20 2 to 6
Ti02 0 to 1
Fe203 0 to 1
Others 0 to 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU50045/96A AU5004596A (en) | 1995-03-31 | 1996-03-19 | A mineral fiber composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19512145.7 | 1995-03-31 | ||
DE1995112145 DE19512145C2 (en) | 1995-03-31 | 1995-03-31 | Mineral fiber composition |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996030314A1 true WO1996030314A1 (en) | 1996-10-03 |
Family
ID=7758469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/001181 WO1996030314A1 (en) | 1995-03-31 | 1996-03-19 | A mineral fiber composition |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU5004596A (en) |
DE (1) | DE19512145C2 (en) |
WO (1) | WO1996030314A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0872458A1 (en) * | 1997-04-19 | 1998-10-21 | Grünzweig + Hartmann AG | Mineral fibre composition |
EP1678386B2 (en) † | 2003-10-06 | 2020-11-18 | Saint-Gobain Isover | Insulating mat of mineral fibre wound in a roll for press fitting between beams |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100676167B1 (en) * | 2006-01-25 | 2007-02-01 | 주식회사 케이씨씨 | A biodegradable ceramic fiber composition for a heat insulating material |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0459897A1 (en) * | 1990-06-01 | 1991-12-04 | Isover Saint-Gobain | Mineral fibres degradable in physiological medium |
WO1992009536A1 (en) * | 1990-11-23 | 1992-06-11 | Paroc Oy Ab | Mineral fibre composition |
FR2690438A1 (en) * | 1992-04-23 | 1993-10-29 | Saint Gobain Isover | Mineral fibers capable of dissolving in a physiological medium. |
DE4427368A1 (en) * | 1994-08-02 | 1996-02-08 | Gruenzweig & Hartmann | Mineral fibre compsn. used as insulating material |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417230A1 (en) * | 1994-05-17 | 1995-11-23 | Gruenzweig & Hartmann | Biologically degradable mineral fibre compsn. |
-
1995
- 1995-03-31 DE DE1995112145 patent/DE19512145C2/en not_active Revoked
-
1996
- 1996-03-19 WO PCT/EP1996/001181 patent/WO1996030314A1/en active Application Filing
- 1996-03-19 AU AU50045/96A patent/AU5004596A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0459897A1 (en) * | 1990-06-01 | 1991-12-04 | Isover Saint-Gobain | Mineral fibres degradable in physiological medium |
WO1992009536A1 (en) * | 1990-11-23 | 1992-06-11 | Paroc Oy Ab | Mineral fibre composition |
FR2690438A1 (en) * | 1992-04-23 | 1993-10-29 | Saint Gobain Isover | Mineral fibers capable of dissolving in a physiological medium. |
DE4427368A1 (en) * | 1994-08-02 | 1996-02-08 | Gruenzweig & Hartmann | Mineral fibre compsn. used as insulating material |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0872458A1 (en) * | 1997-04-19 | 1998-10-21 | Grünzweig + Hartmann AG | Mineral fibre composition |
WO1998047831A1 (en) * | 1997-04-19 | 1998-10-29 | Isover Saint-Gobain | A biodegradable mineral-fiber composition |
EP1678386B2 (en) † | 2003-10-06 | 2020-11-18 | Saint-Gobain Isover | Insulating mat of mineral fibre wound in a roll for press fitting between beams |
Also Published As
Publication number | Publication date |
---|---|
AU5004596A (en) | 1996-10-16 |
DE19512145A1 (en) | 1996-10-02 |
DE19512145C2 (en) | 1997-06-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3929497A (en) | Crystallizable glass suitable for fiber production | |
US4461840A (en) | Heat resistant glass fiber composition | |
IE66323B1 (en) | Glass fibres capable of decomposing in a physiological mediam | |
US4607015A (en) | Glass composition, its method of formation and products made therefrom | |
EP0710220B1 (en) | A mineral-fiber composition | |
AU721117B2 (en) | Mineral fiber composition | |
KR20000064588A (en) | Artificial light surface composition | |
US3600205A (en) | Boric oxide-free glass fibers and compositions for making them | |
WO1996030314A1 (en) | A mineral fiber composition | |
CA2162890A1 (en) | A mineral-fiber composition | |
WO1996016913A1 (en) | A mineral fiber composition | |
EP0721432B1 (en) | A mineral-fiber composition | |
KR890000726B1 (en) | Glass composition suitable for manufacture of fibres | |
JPH02504320A (en) | Oxide coating for fluoride glass | |
US10787383B2 (en) | Mineral fibres | |
HUT77856A (en) | Mineral fiber composition | |
SK4896A3 (en) | Mineral fibre composition | |
DE19503168A1 (en) | Biodegradable mineral fibre for thermal insulation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR CA CN CZ FI HU IS JP KR NO NZ PL SI SK TR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: CA |