Thermoforming
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PLA Crystallization Improving Heat Resistance
Problem Phenomenon
PLA thermoformed cups have insufficient heat resistance; annealing crystallization improves heat resistance but transparency decreases
Cause Analysis
Increasing crystallinity can significantly improve PLA heat resistance; '2079851475616104458 mold heating or annealing treatment promotes crystallization; but crystallization makes transparent products opaque, and transparency and heat resistance require a trade-off
Solution
①Heat-resistant parts are thermoformed with a heated mold to promote crystallization; ②Or annealing crystallization after forming; ③Transparent parts accept low heat resistance or switch to heat-resistant transparent grades; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Crystallization is the key to PLA heat resistance and also the enemy of transparency; choose the crystallization strategy according to product positioning; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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