Material Analysis
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PVC Recycling Challenge
Problem Phenomenon
Degradation intensified after processing PVC recycled material, and properties became disordered after mixing materials from different sources
Cause Analysis
The thermal history of PVC recycled material partially consumes the stabilizer, making reprocessing more prone to degradation; mixing different formulation systems makes properties uncontrollable; PVC's recycling rate is far lower than other general-purpose plastics
Solution
①Blend recycled material in limited proportions; ②supplement heat stabilizer to improve reprocessing stability; ③manage source classification to avoid formulation mixing; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
The inherent shortcoming of PVC recycling is stabilizer consumption; limiting amount, supplementing stabilizer, and classification are the three principles of recycled use; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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