Processing Machinery
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PCL plasticizer migration
Problem Phenomenon
After PCL is added with plasticizer to improve fluidity, the plasticizer migrates to the surface, causing decreased mechanical properties and yellowing.
Cause Analysis
PCL has limited compatibility with plasticizers; plasticizers easily migrate to the material surface; mechanical properties are reduced; yellowing and whiteness decline are triggered; long-term use problems.；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
①Selection of plasticizer types with good compatibility; ②Minimization of addition amount; ③Surface treatment to prevent migration; ④Long-term performance tracking; ⑤Alternative modification methods.；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PCL plasticizer migration is a side effect of modification; compatibility selection is the key; tracking evaluates long-term effects.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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