What are glass compositions, fiberglass, composite materials, and methods for preparing fiberglass?

International Composites has recently obtained an invention patent authorization, the patent name is "Glass composition, fiberglass, composite material and fiberglass preparation method", the patent application number is CN202111240519.3, and the authorization date is June 11, 2024.

Patent abstract: The present invention provides a glass composition, fiberglass, composite material and fiberglass preparation method, wherein the glass composition is used for drawing to form fiberglass, and the composition includes the following components: 56-64% SiO2; 12-20% Al2O3; 4-14% B2O3; 5-12% Na2O+K2O; 4-8% MgO; 0.5-4.5% CaO; 0-0.6% Fe2O3; 0-1% TiO2; the content of each component is mass percentage, and the content of SiO2+B2O3 is 60-70%, the content of Na2O/the content of K2O is>1, and the content of MgO/the content of CaO is>1.

The fiberglass formed from the high modulus and low refractive index glass composition of the present invention has a relatively low refractive index of 1.501-1.519 and good mechanical properties, and its tensile modulus can reach above 84.3-90.5 GPa.