Processing Machinery
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PLA and PBAT Blending
Problem Phenomenon
The toughness of PLA/PBAT blend film is improved, but phase separation causes uneven performance
Cause Analysis
PLA is brittle and PBAT is flexible, and blending can balance rigidity and toughness; but the two have poor compatibility and easy phase separation; a compatibilizer is needed to improve the interface; the blend ratio determines the performance orientation; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
①Add compatibilizer in blending to improve compatibility; ②Optimize the ratio per rigidity-toughness requirements; ③The blending process ensures uniform dispersion; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PLA/PBAT blending is the mainstream formula for degradable films; the compatibilizer is the key to performance uniformity; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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