Injection Molding
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EVA product odor
Problembeschreibung
Foamed or injection molded products have an acetic acid odor.
Ursachenanalyse
Overheating during EVA processing causes the vinyl acetate segments to decompose and release acetic acid; excessively long residence time also produces it.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Lösung
①Control the processing temperature; ②shorten the residence time; ③clean the equipment; ④strengthen workshop ventilation.; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
The acetic acid odor is a characteristic signal of EVA thermal degradation; temperature management can control it.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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