Processing Machinery
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PLA insufficient heat resistance and deformation
Problem Phenomenon
Products soften and deform in 50~60℃ environments.
Cause Analysis
PLA's glass transition temperature is about 50~60℃; conventional low-crystallinity products have poor heat resistance; high-temperature scenarios such as hot drink cups fail directly.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
① Increase crystallinity (heat setting/nucleating agents); ② select heat-resistant modified PLA grades; ③ evaluate CPLA crystallized products; ④ verify according to use temperature.
Key Takeaway
PLA heat resistance relies on increasing crystallinity; heat-set crystallization (CPLA) can significantly increase the heat resistance temperature.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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