Bottle glass formula

Abstract

The invention relates to a bottle glass formula, wherein the bottle glass comprises, by weight, 69.5-72.5% of SiO2, 1.9-3.1% of AlO3, 10.2-10.6% of CaO, 2.0-2.5% of MgO, 12.8-13.0% of Na2O, 0.3-0.7% of K2O, less than or equal to 0.3% of Fe2O3, and less than or equal to 0.3+ / -0.1%. According to the bottle glass formula of the present invention, in the high calcium formula, the total content of CaO+MgO is increased, the Na2O amount is reduced, and the appropriate MgO content is maintained, such that the material performance of the glass is adjusted, the molding performance of the glass is improved, and the relative machine speed is increased and the water resistance (HGB) of the glass product is substantially increased in the case of the same mold cooling air flow. In addition, the soda ash consumption is reduced so as to easily achieve energy saving and reduce cost.

Description

technical field [0001] The invention relates to a bottle glass formulation, in particular to a low-magnesium, low-alkali, and high-calcium bottle glass formulation. Background technique [0002] Glass composition can have a significant impact on both glass performance and cost. With the improvement of the molding speed of the bottle making machine, the glass composition of bottles and jars generally adopts high-calcium glass formula. In the chemical composition of high-calcium glass formula: the total content of CaO+MgO is 10-11%, of which the content of MgO is 0.2-2.0%, Na 2 The O content is above 14%. But there is following defect in existing high-calcium glass formula, Ca ++ The ions are more active at high temperature, which can reduce the viscosity of the glass and promote the melting and clarification of the glass. But if there is more CaO content in the glass, when the glass temperature decreases, the viscosity of the glass will increase rapidly, which will shorte...

AI Technical Summary

Problems solved by technology

But there is following defect in existing high-calcium glass formula, Ca ++ The ions are more active at high temperature, which can reduce the viscosity of the glass and promote the melting and clarification of the glass

But if there is more CaO content in the glass, when the glass temperature decreases, the viscosity of the glass will increase rapidly, which will shorten the material properties and increase the brittleness of the glass.

And the Na in the original formula 2 The O content is too large, that is, the amount of soda ash used is large and the cost is high

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