Optimizing induction sealing for milk bottles at different conveyor speeds

Optimal sealing helps reduce milk spoilage amid rising temperatures caused by climate change. One potential solution is the use of alufo plastic on the bottle mouth with an induction sealing machine. This study aimed to evaluate the effectiveness of alufo plastic in sealing 200 mL milk bottles at different sealing speeds. The experiment used a completely randomized design with three treatments: 10, 15, and 20 rpm, each with three replications. The study was conducted at the Teaching Factory (Tefa) Milk, Jember State Polytechnic. The results showed that the average sealing time (P < 0.05) was 7.88 seconds at 10 rpm, 6.01 seconds at 15 rpm, and 5.28 seconds at 20 rpm. The physical leak test revealed that samples sealed at 10 and 15 rpm showed no leakage, whereas those sealed at 20 rpm exhibited leakage (P < 0.05). The vacuum test further confirmed that bottles sealed at 10 rpm had better sealing integrity compared to the others (P<0.05). In conclusion, sealing 200 mL milk bottles using aluminum plastic at a speed of 10 rpm for 7.88 seconds provides the most effective sealing performance. This method can help improve the safety and shelf life of milk products.