Processing Machinery
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PLA film brittle tearing
Problem Phenomenon
PLA film has poor tensile and tear properties.
Cause Analysis
PLA's inherent brittleness makes the film poorly ductile; the crystalline state also affects toughness.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
① Add plasticizers to improve flexibility; ② blend with PBSA/PHB etc.; ③ optimize the biaxial stretching process; ④ control crystallinity.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PLA film relies on plasticization and blending to improve toughness; bio-based toughening agents maintain degradability.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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