Material Analysis
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PLA Toughening Modification Route
Problem Phenomenon
Pure PLA is too brittle for daily-use products, and after toughening the transparency and degradability are damaged
Cause Analysis
PLA toughening routes: blending with flexible polymers such as PCL, PEG, natural rubber, PBAT, PBSA; PBSA-toughened PLA blending can significantly improve toughness but sacrifices part of the transparency
Solution
①Select PCL/PBAT/PBSA blending according to toughness requirements; ②Evaluate modification losses for transparency requirements; ③The blend ratio is verified by both mechanical and degradation tests; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PLA toughening is a trilemma of toughness, transparency and degradation; the blending route is the most mature, and the ratio needs dual verification; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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