EP0714381A1 - A mineral-fiber composition - Google Patents

A mineral-fiber composition

Info

Publication number
EP0714381A1
EP0714381A1 EP95920813A EP95920813A EP0714381A1 EP 0714381 A1 EP0714381 A1 EP 0714381A1 EP 95920813 A EP95920813 A EP 95920813A EP 95920813 A EP95920813 A EP 95920813A EP 0714381 A1 EP0714381 A1 EP 0714381A1
Authority
EP
European Patent Office
Prior art keywords
mineral
less
weight
percent
fiber composition
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.)
Ceased
Application number
EP95920813A
Other languages
German (de)
French (fr)
Inventor
Peter Lohe
Wolfgang Holstein
Wolfgang Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE4417231A external-priority patent/DE4417231C3/en
Priority claimed from DE1995103172 external-priority patent/DE19503172A1/en
Application filed by Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Publication of EP0714381A1 publication Critical patent/EP0714381A1/en
Ceased legal-status Critical Current

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
    • 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

Definitions

  • a mineral-fiber composition 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.
  • 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.
  • the object of the invention is a mineral-fiber composition that is biologically degradable, characterized by the following constituents in percent by weight:
  • the inventive mineral-fiber compositions are drawable by the jet process or the rotary process.
  • the obtained fibers have good temperature stability.
  • 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.
  • inventive mineral-fiber compositions preferably have the following constituents in percent by weight:
  • inventive mineral-fiber compositions have the following constituents in percent by weight: SiO 2 55 to 59
  • 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.
  • the temperature behavior of the mineral fibers was determined by the Swedish 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.
  • 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/ ⁇ .3.
  • the temperature increase is 5 K/min.
  • the change in test sample height is determined continuously with a reading optic.
  • a mineral wool of the following composition in percent by weight was produced:
  • This composition could be processed well to mineral fibers with a mean diameter of 2.5 microns by the jet process at a drawing temperamre of 1330°C.
  • a mineral wool with the following composition in percent by weight was produced: % bv weight Mole %
  • This composition could be processed well to mineral fibers with a mean diameter of 2.7 microns by the jet process at a drawing temperamre of 1310°C.

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 therefrom, 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
AI2O3 less than 2
CaO 16 to 30
MgO 4 to 15
Na2θ 8 to 20 K2O 0 to 2
B2O3 0 to 10
TiO2, Fe2O3, Cr2O3, BaO, MnO, P2O5 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:
S1O2 55 to 60
AI2O3 less than 1.5
CaO 16 to 25
MgO 5 to 15
Na2θ 9 to 15
K2O less than 2
B2O3 0 to 8
Tiθ2, Fe2θ3, Cr2U3, BaO, MnO, P2O5 0 to 5
In particular, the inventive mineral-fiber compositions have the following constituents in percent by weight: SiO2 55 to 59
AI2O3 less than 1.5
CaO 18 to 23
MgO 8 to 12
Na2θ 9 to 13
K2O less than 1
B2O3 0 to 3
TiO2, Fe2θ3, Cr2O3, BaO, MnO, P2O5 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 conducted 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/π.3. The temperature 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
Al2O3 0.5
CaO 20
MgO 10
Na2θ 10
B2O3 2.7
This composition could be processed well to mineral fibers with a mean diameter of 2.5 microns by the jet process at a drawing temperamre of 1330°C.
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 temperamre stability at 5% reduction in height of 620°C, 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: % bv 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 temperamre of 1310°C.
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 temperamre behavior by the Swedish method yielded a temperamre stability at 5% reduction in height of 600°C.

Claims

Claims
1. A mineral-fiber composition that is biologically degradable, characterized by the following constituents in percent by weight:
SiO2 50 to 65
Al O3 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:
Siθ2 55 to 60
AI2O3 less than 1.5
CaO 16 to 25
MgO 5 to 15
Na O 9 to 15
K O less than 2
B2O3 0 to 8
Tiθ2, Fe2O3, O^, BaO, MnO, P2O5 0 to 5
3. The mineral-fiber composition of claim 1, characterized by the following constituents in percent by weight:
Siθ2 55 to 59 AI2O3 less than 1.5
CaO 18 to 23
MgO 8 to 12
Na2θ 9 to 13
K2O less than 1
B2O3 0 to 3
Tiθ2, Fe2θ3, Cr2U3, 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.
EP95920813A 1994-05-17 1995-05-16 A mineral-fiber composition Ceased EP0714381A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4417231 1994-05-17
DE4417231A DE4417231C3 (en) 1994-05-17 1994-05-17 Use of a composition as a material for biodegradable mineral fibers
DE1995103172 DE19503172A1 (en) 1995-02-01 1995-02-01 Biologically degradable mineral fibre composition
DE19503172 1995-02-01
PCT/EP1995/001843 WO1995031411A1 (en) 1994-05-17 1995-05-16 A mineral-fiber composition

Publications (1)

Publication Number Publication Date
EP0714381A1 true EP0714381A1 (en) 1996-06-05

Family

ID=25936642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95920813A Ceased EP0714381A1 (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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HRP950325A2 (en) * 1994-06-19 1997-08-31 Saint Gobain Isover Mineral-fiber compositions
HRP950332A2 (en) * 1994-08-02 1997-04-30 Saint Gobain Isover Mineral-fiber composition
GB9508683D0 (en) * 1994-08-02 1995-06-14 Morgan Crucible Co Inorganic fibres
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)

* Cited by examiner, † Cited by third party
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.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9531411A1 *

Also Published As

Publication number Publication date
IS4283A (en) 1995-11-18
FI955417A (en) 1995-11-18
CZ312095A3 (en) 1997-04-16
AU2612995A (en) 1995-12-05
BR9506227A (en) 1997-08-12
PL312575A1 (en) 1996-04-29
JPH08511761A (en) 1996-12-10
HU9600085D0 (en) 1996-03-28
NO960190D0 (en) 1996-01-16
WO1995031411A1 (en) 1995-11-23
NO960190L (en) 1996-01-16
CA2162890A1 (en) 1995-11-23
SK149695A3 (en) 1996-04-03
FI955417A0 (en) 1995-11-10
KR960703815A (en) 1996-08-31
CN1128529A (en) 1996-08-07

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