Injection Molding
2 views
EVA product odor
Problem Phenomenon
Foamed or injection molded products have an acetic acid odor.
Cause Analysis
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
Solution
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
Key Takeaway
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
Was this helpful?
0 people found this helpful
Thank you for your feedback!