Kyung Won Min1,2,Jae Ho Choi1,2,YoonSung Jung1,2,Young Min Byun1,2,Won Bin Im2,Hyeong-Jun Kim2
Hanyang University1,Korea Institute of Ceramic Engineering and Technology2
Kyung Won Min1,2,Jae Ho Choi1,2,YoonSung Jung1,2,Young Min Byun1,2,Won Bin Im2,Hyeong-Jun Kim2
Hanyang University1,Korea Institute of Ceramic Engineering and Technology2
Soda-lime glass has been used for a long time as a glass container because of its ease of melting, the abundance of raw materials, and cheapness. However, the glass container is damaged due to contact and collision between the containers, in the process of washing, filling, and capping, so the strength of the container is reduced to one-thousandths. HEC (Hot End Coating) and CEC (Cold End Coating) are applied to compensate for the decrease in the strength of glass containers. It is known that the mechanical properties of soda-lime glass can be improved using chemical strengthening. Therefore, in this study, the chemical strengthening was applied under annealing conditions to increase the strength of the container. For chemical strengthening, melted KNO<sub>3</sub> was spray-coated on a glass container. The strengthening temperature was performed at T<sub>g</sub>±50°C. for 1 hour and then the cooling rate was 5°C/min until 100°C. After washing the strengthened glass container, mechanical properties and surface changes were confirmed. After that, reliability evaluation was conducted through surface roughness change according to the presence or absence of HEC and chemical strengthening. Reliability was confirmed by measuring the impact strength value.