초록 ▼

The invention relates to glass fibers having a chemical composition that contains the following constituents in the limits defined hereafter and expressed in percentage by weight, namely: 38 to 49 SiO2; 15 to 25 Al2O3; 1 to 15 CaO; 0 to 4 MgO; 14 to 25 Na2O; 0 to 10 K2O; 0 to 8 B2O3; 0 to 3 Fe2O3; a

The invention relates to glass fibers having a chemical composition that contains the following constituents in the limits defined hereafter and expressed in percentage by weight, namely: 38 to 49 SiO2; 15 to 25 Al2O3; 1 to 15 CaO; 0 to 4 MgO; 14 to 25 Na2O; 0 to 10 K2O; 0 to 8 B2O3; 0 to 3 Fe2O3; and 0 to 3 P2O5.

대표청구항 ▼

What is claimed is: 1. A mineral wool, comprising a glass fiber having a chemical composition comprising the following constituents within the limits defined below, expressed as percentages by weight: SiO2 40 to 48 Al2O3 18 to 22 CaO   1 to 8.5 MgO  &#x

What is claimed is: 1. A mineral wool, comprising a glass fiber having a chemical composition comprising the following constituents within the limits defined below, expressed as percentages by weight: SiO2 40 to 48 Al2O3 18 to 22 CaO   1 to 8.5 MgO   0 to 3.5 Na2O 15 to 22 K2O 0 to 6 B2O3 0 to 6 Fe2O3 0 to 3 P2O5  0 to 3. 2. The mineral wool as claimed in claim 1, wherein a total content of alkali metal oxides in the chemical composition of the glass fiber is greater than or equal to 21%. 3. The mineral wool as claimed in claim 1, wherein the chemical composition of the glass fiber comprises the following constituents within the limits defined below, expressed as percentages by weight: SiO2   44 to 46.7 Al2O3 18 to 21 CaO 1 to 8 MgO   0 to 3.5 Na2O 15 to 21 K2O 3 to 6 B2O3 0 to 5 Fe2O3 0 to 3 P2O5  0 to 3. 4. The mineral wool as claimed in claim 3, wherein the content of Na2O is between 16 and 21%. 5. The mineral wool as claimed in claim 4, wherein the chemical composition of the glass fiber comprises the following constituents within the limits defined below, expressed as percentages by weight: SiO2 44 to 46 Al2O3 18 to 20 CaO 4 to 8 MgO   1 to 3.2 Na2O 16.5 to 18.5 K2O 4 to 5 B2O3 3 to 5 Fe2O3 0 to 3 P2O5  0 to 3. 6. The mineral wool as claimed in claim 1, wherein the chemical composition of the glass fiber comprises the following constituents within the limits defined below, expressed as percentages by weight: SiO2 46 to 48 Al2O3 18 to 20 CaO  5 to 10 MgO 0 to 1 Na2O   14 to 16.5 K2O 4 to 6 B2O3 3 to 5 Fe2O3 1 to 3 P2O5  0 to 3. 7. A structural part, comprising the mineral wool as claimed in claim 1 as an insulating core between two metal panels. 8. A thermal and/or acoustic insulation material comprising the mineral wool as claimed in claim 1. 9. A soilless culture substrate comprising the mineral wool as claimed in claim 1.