Saint-gobain Technical Fabrics Europe

Sophie Creux

Emmanuel Lecomte

Anne Berthereau

Nicolas Renaud

The invention relates to glass reinforcement strands, the composition of which comprises the following constituents in the limits defined below, expressed as percentages by weight: 59 to 63% SiO; 10 to 16% AlO; 16 to 23% CaO; 1 to 3.2% MgO; 0 to 2% NaO+KO+LiO; 0 to 1% TiO; 0.1 to 1.8% BO; 0 to 0.5% LiO; 0 to 0.4% ZnO; 0 to 1% MnO; and 0 to 0.5% F. These strands have improved properties in terms of mechanical strength, acid resistance and high-temperature resistance for a low-cost composition. The invention also relates to a process for producing the said strands and to the composition allowing them to be produced.

Glass yarn for reinforcing organic and/or inorganic materials

The invention relates to glass reinforcement strands, the composition of which comprises the following constituents in the limits defined below, expressed as percentages by weight: 58 to 63% SiO; 10 to 16% AlO; 16 to 23% CaO; 0.5 to 3.5% MgO; 0 to 2% NaO+KO+LiO; 1 to 1.5% TiO; 0 to 1.5% BO; 0 to 0.4% LiO; 0 to 0.4% ZnO; 0 to 1% MnO; and 0 to 0.5% F. These strands have improved properties in terms of mechanical strength, acid resistance and high-temperature resistance for a low-cost composition. The invention also relates to a process for producing the said strands and to the composition allowing them to be produced.

Glass reinforcement strand, the composition of which comprises the following constituents, within the limits defined below, expressed as percentages by weight: The dielectric properties of such glass compositions are particularly advantageous in the MHz and GHz ranges.

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Den Haag, Netherlands

Sophie Creux