Processing Machinery
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Insufficient Heat Seal Strength of LDPE Film
Fenómeno del problema
The heat seal area of bag making has low strength and fails the peel test.
Análisis de la causa
Improper heat seal layer resin selection or mismatched heat seal temperature, time and pressure parameters; film surface contamination also affects sealing.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solución
①Optimize the three parameters of heat seal temperature, pressure and time; ②select a suitable heat seal layer resin; ③keep the film surface clean; ④do heat seal curve verification.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Heat seal performance is jointly determined by material and process window; systematically making heat seal curves can find the optimal parameter zone.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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