Processing Machinery
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EVA Foaming Additive Batch Fluctuation
Problem Phenomenon
The density of products produced with different batches of foaming agent differs significantly.
Cause Analysis
Differences in decomposition rate between foaming agent batches (such as AC gas yield fluctuation of ±10ml/g) directly change the foaming ratio.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Establish a supplier quality certification system; ②test the foaming agent decomposition curve for each batch; ③fine-tune the formula according to the test; ④fix qualified suppliers.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Additive batch management is the basis of foaming stability; incoming inspection is more economical than post-adjustment.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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