WO2002004373A1 - A fiberglass composition - Google Patents
A fiberglass composition Download PDFInfo
- Publication number
- WO2002004373A1 WO2002004373A1 PCT/IT2001/000357 IT0100357W WO0204373A1 WO 2002004373 A1 WO2002004373 A1 WO 2002004373A1 IT 0100357 W IT0100357 W IT 0100357W WO 0204373 A1 WO0204373 A1 WO 0204373A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composition
- percentage
- present
- weight
- anyone
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 57
- 239000011152 fibreglass Substances 0.000 title claims abstract description 19
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004031 devitrification Methods 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 12
- 229910052906 cristobalite Inorganic materials 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000005755 formation reaction Methods 0.000 description 11
- 239000011521 glass Substances 0.000 description 10
- 230000009467 reduction Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- NWXHSRDXUJENGJ-UHFFFAOYSA-N calcium;magnesium;dioxido(oxo)silane Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O NWXHSRDXUJENGJ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052637 diopside Inorganic materials 0.000 description 1
- 210000004177 elastic tissue Anatomy 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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
- C03C2213/00—Glass fibres or filaments
- C03C2213/02—Biodegradable glass fibres
Definitions
- the present invention relates to a new fiberglass composition.
- mineral fibers and in particular glass fibers find wide application in making felts, marketed in the form of panels or rolls for example, typically designed to make thermal and/or acoustical insulation structures in the civil field.
- fiberglass felts are manufactured following the process briefly described below.
- the material that will form the fiber is brought to a high temperature until a physical state is reached in which the glass takes a fluid consistency. Subsequently fiber formation takes place and the fibers are laid down onto appropriate conveyor belts forming felts of a predetermined thickness.
- the fiber forming step can be obtained for example by conveying the material in a fluid state within appropriate rotors provided with a great number of perimetric holes capable of carrying out a centrifugal extrusion of the material that, submitted to the action of combustion gasses from an annular burner, is reduced into extremely fine fibers.
- the last-mentioned fibers after cooling and treatment are caused to lay down on a conveyor belt forming a more or less homogeneous fiber layer.
- the felt thickness which is formed can be established by adjusting the speed of the conveyor belts depending on the fiber formation speed. Once the fiberglass felt has been formed on the conveyor belt, typically compression operations are carried out on the felt itself and the latter is packaged into panels or rolls .
- the fiberglass composition being the object of the present invention must have an optimal working or "fibering" temperature (temperature at which the viscosity of the liquid vitreous mass is of about 1000 poises) , considerably different from and higher than the temperatures to which the phenomena of formation and growing of devitrified crystals occur and propagate.
- the fiberglass composition being the object of the present invention must be able to create felts of good mechanical features, in particular in terms of elasticity, which will enable a good mechanical behavior of the final product as well as an easier packaging of same in within reduced spaces.
- the concerned fiberglass composition must be adapted to enable accomplishment of products such as panels or rolls of fibrous material having excellent features in terms of thermal and/or acoustical insulation.
- devitrification it is meant the tendency to occurrence of crystalline formations within the matrix of the vitreous mass substantially in a liquid state.
- liquidus temperature (T x ) expressed in degrees centigrade, it is indicated the temperature at which beginning of formation of devitrified crystals occurs inside the liquid vitreous matrix.
- maximum devitrification speed expressed in micron/h (Vmax) it is intended the maximum growth speed of the average sizes of the devitrified crystals inside the liquid vitreous matrix.
- temperature of maximum growth speed T v(max) expressed in degrees centigrade, it is intended the temperature at which the V max, i.e. the maximum growth speed of the average sizes of the devitrified crystals, occurs .
- fibering temperature T f
- devitrification parameters and in particular temperatures appear to be very high and lead to a glass in which, during fibering, if one wishes to operate at an optimal viscosity, marked phenomena of devitrification occur .
- Silica too was greatly reduced with respect to glasses of the standard type (such as those analyzed above in detail, for example) , thereby achieving a further advantage in terms of devitrification parameters.
- V (max) With reference to the effects of the adopted choices on the V (max) , it should be noted that, supposing the kinetics of crystal formation and in particular of ⁇ -wallastone, devitrite and diopside formation is a function of the CaO and MgO percentages, their decrease will have a value of V (max) .
- V( ma ) is also reduced due to replacement of part of Si0 2 with Na 2 0 and, to a lower extent, with K 2 0, because the greater fluidity of the vitreous mass brings to a substantial kinetic balance between the crystals (in particular devitrite) which are formed and the crystals that constantly dissolve in the vitreous liquid.
- the composition in reference gives rise to improved fibers from a mechanical point of view too.
- the invention achieves important advantages. It should be recognized in fact that all compositions of new conception, in addition to being excellent from the point of view of fibering ability, optimal from a mechanical point of view and acceptable in terms of bio-solubility, due to the low temperature at which they are able to be worked into fibers, they have greatly increased (by 30%, on the average) the mean life of the rotors used for fiberglass production.
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)
- Glass Compositions (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01954322A EP1309520A1 (en) | 2000-07-07 | 2001-07-06 | A fiberglass composition |
| AU2001276662A AU2001276662A1 (en) | 2000-07-07 | 2001-07-06 | A fiberglass composition |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2000MI001536A IT1318613B1 (it) | 2000-07-07 | 2000-07-07 | Composizione per fibra di vetro. |
| ITMI2000A001536 | 2000-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002004373A1 true WO2002004373A1 (en) | 2002-01-17 |
Family
ID=11445431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2001/000357 WO2002004373A1 (en) | 2000-07-07 | 2001-07-06 | A fiberglass composition |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1309520A1 (es) |
| AU (1) | AU2001276662A1 (es) |
| ES (1) | ES2174731B1 (es) |
| IT (1) | IT1318613B1 (es) |
| WO (1) | WO2002004373A1 (es) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973974A (en) * | 1974-03-20 | 1976-08-10 | Kanebo, Ltd. | Alkali resistant glass compositions and alkali resistant glass fibers prepared therefrom |
| US4142906A (en) * | 1977-06-06 | 1979-03-06 | Ikebukuro Horo Kogyo Co., Ltd. | Glass composition for alkali-resistant glass fiber |
| IT1212256B (it) * | 1978-03-03 | 1989-11-22 | Ikebukuro Horo Kogyo Co | Composizione vetrosa per fibre di vetro resistenti agli alcali. |
| DE4418726A1 (de) * | 1994-05-28 | 1995-11-30 | Gruenzweig & Hartmann | Glasfaserzusammensetzungen |
| WO1995032925A1 (en) * | 1994-05-28 | 1995-12-07 | Isover Saint-Gobain | Glass-fiber compositions |
| WO1995032926A1 (en) * | 1994-05-28 | 1995-12-07 | Isover Saint-Gobain | Glass-fiber compositions |
| US5523264A (en) * | 1995-03-31 | 1996-06-04 | Owens-Corning Fiberglas Technology, Inc. | Glass compositions and fibers therefrom |
| US5962355A (en) * | 1996-04-24 | 1999-10-05 | Owens Corning Fiberglas Technology, Inc. | Glass compositions having high KI values and fibers therefrom |
-
2000
- 2000-07-07 IT IT2000MI001536A patent/IT1318613B1/it active
- 2000-10-26 ES ES200002580A patent/ES2174731B1/es not_active Expired - Fee Related
-
2001
- 2001-07-06 AU AU2001276662A patent/AU2001276662A1/en not_active Abandoned
- 2001-07-06 EP EP01954322A patent/EP1309520A1/en not_active Withdrawn
- 2001-07-06 WO PCT/IT2001/000357 patent/WO2002004373A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973974A (en) * | 1974-03-20 | 1976-08-10 | Kanebo, Ltd. | Alkali resistant glass compositions and alkali resistant glass fibers prepared therefrom |
| US4142906A (en) * | 1977-06-06 | 1979-03-06 | Ikebukuro Horo Kogyo Co., Ltd. | Glass composition for alkali-resistant glass fiber |
| IT1212256B (it) * | 1978-03-03 | 1989-11-22 | Ikebukuro Horo Kogyo Co | Composizione vetrosa per fibre di vetro resistenti agli alcali. |
| DE4418726A1 (de) * | 1994-05-28 | 1995-11-30 | Gruenzweig & Hartmann | Glasfaserzusammensetzungen |
| WO1995032925A1 (en) * | 1994-05-28 | 1995-12-07 | Isover Saint-Gobain | Glass-fiber compositions |
| WO1995032926A1 (en) * | 1994-05-28 | 1995-12-07 | Isover Saint-Gobain | Glass-fiber compositions |
| US5523264A (en) * | 1995-03-31 | 1996-06-04 | Owens-Corning Fiberglas Technology, Inc. | Glass compositions and fibers therefrom |
| US5962355A (en) * | 1996-04-24 | 1999-10-05 | Owens Corning Fiberglas Technology, Inc. | Glass compositions having high KI values and fibers therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001276662A1 (en) | 2002-01-21 |
| IT1318613B1 (it) | 2003-08-27 |
| ITMI20001536A1 (it) | 2002-01-07 |
| ITMI20001536A0 (it) | 2000-07-07 |
| EP1309520A1 (en) | 2003-05-14 |
| ES2174731B1 (es) | 2004-08-16 |
| ES2174731A1 (es) | 2002-11-01 |
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