Processing Machinery
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Insufficient heat resistance of EVA hot melt adhesive
Fenómeno del problema
The bonded part opens in a high-temperature environment.
Análisis de la causa
EVA hot melt adhesive has a limited heat resistance upper limit; it fails as soon as the use temperature exceeds the softening point.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solución
①Evaluate the use temperature and select a heat-resistant adhesive type; ②consider reactive adhesives for high-temperature applications; ③conduct heat aging verification; ④manage customer expectations.; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
The heat resistance of hot melt adhesive has a material upper limit; high-temperature applications require upgrading the adhesive type.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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