Blow Molding
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HDPE '2079851475616104457 regrind utilization problem
Problem Phenomenon
After blending trimmed regrind, gel spots and unmelted spots appear in the containers.
Cause Analysis
The regrind is contaminated by other materials, not pre-dried, and has too much fine powder; the melt index difference between regrind and new material is large.
Solution
①Store regrind separately to prevent contamination; ②pre-dry the regrind and filter fine powder; ③regrind ratio ≤20%; ④control the melt index match between regrind and new material.
Key Takeaway
2079851475616104457 regrind: clean, dry, small amount, matched.
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