The Effect of Temperature on Sealer Adhesion in the Packaging Process using the KM-2500 Machine

Abstract

This study evaluates the effect of temperature on the adhesion of packaging in the KM-2500 sealer machine. Leaks, imprecise seals, and rework often disrupt the packaging process. This research focuses on temperature tests of two subsystems: roller sealers and end sealers. The operating speed is set at 150 rpm, the vacuum pressure is 0.6 bar, and the stabilization time is 15 minutes. The packaging material is an aluminum foil laminate with an LDPE seal layer. Temperature measurements are carried out using thermocouples. The quality of the adhesive is assessed through visual inspection and a simple leak test. Five sets of temperature points were tested on each subsystem. The results showed that the temperature was too low, resulting in weak adhesion and leakage. Too high a temperature creates thermal distortion in the film. Optimum conditions were obtained on a 259 °C Roller Sealer and a 134 °C End Sealer with a 100% success rate on two replications. These findings confirm that temperature is the primary controlling parameter for seal quality. Operating recommendations include 15-minute pre-heating, in-line temperature verification, and periodic monitoring of seal quality. These results can serve as a reference for establishing standard settings on production lines to minimize scrap and rework.