Production & Quality
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PLA Heat Resistance Shortcoming
Problem Phenomenon
PLA tableware softens and deforms after holding hot food, or PLA parts deform in a car in summer
Cause Analysis
PLA heat deflection temperature is low (about 55-60℃), and it softens near the glass transition temperature; ordinary PLA products have poor heat resistance, and hot drinks, hot food and high-temperature environments all exceed the limits
Solution
①For heat resistance requirements select high-crystallization or heat-resistant modified PLA; ②Annealing crystallization after '2079851475616104458 to increase HDT; ③Evaluate alternative materials for high-temperature environments; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Heat resistance is PLA's second shortcoming; crystallization and heat-resistant modification are the two routes to increase HDT; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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