Glass fiber composition

C - Chemistry – Metallurgy – 03 – C

Patent

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C03C 13/02 (2006.01)

Patent

CA 2745050

A glass fibre composition comprises (wt.%) SiO2 58-65%, CaO 20-26%, Al2O3 9- 17%, MgO 0.5-1%, B2O3 0-5%, F2 0-1%, TiO2 0.1-1%, K2O+Na2O 0-0.8%, Fe2 O3 0.1-0.5%, SO3 0-0.6%, and CaO+MgO 21-27%. Contents of components are based on the following mathematical relationship, 21<(CaO+MgO)/MgO<43. The composition improves mechanical strength, high temperature resistance and chemical stability of the glass fibre; and the glass fibre has fine drawing performance. The materi-als of the composition have low cost and meet the environmental protection requirements.

La présente invention concerne une composition de fibre de verre comprenant (% en poids) 58 à 65 % de SiO2, 20 à 26 % de CaO, 9 à 17 % de Al2O3, 0,5 à 1 % de MgO, 0 à 5 % de B2O3, 0 à 1 % de F2, 0,1 à 1 % de TiO2, 0 à 0,8 % de K2O+Na2O, 0,1 à 0,5 % de Fe2 O3, 0 à 0,6 % de SO3, et 21 à 27 % de CaO+MgO. Les proportions des composants sont basées sur la relation mathématique suivante 21<(CaO+MgO)/MgO<43. La composition améliore la résistance mécanique, la résistance aux températures élevées et la stabilité chimique de la fibre de verre, et la fibre de verre présente de bonnes performances à l'étirage. Les substances de la composition sont peu coûteuses et satisfont les conditions de protection de l'environnement.

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