Extrusion & Post
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LLDPE recycled material utilization
Problem Phenomenon
After processing LLDPE recycled material, strength decreases, film gel particles increase, performance is unstable
Cause Analysis
The thermal history of LLDPE recycled material reduces molecular weight; performance degrades cumulatively after multiple cycles; too high a recycled material ratio dilutes virgin material performance; patented three-layer coextrusion can utilize recycled material at high ratio
Solution
①Control recycled material ratio within 30%; ②utilize recycled material at high ratio in the three-layer coextrusion inner layer; ③clean sorting and batch verification of recycled material; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
High-ratio utilization of LLDPE recycled material relies on structural design; the three-layer coextrusion inner layer is the best destination for recycled material; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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