Extrusion & Post
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PMMA Annealing Process Missing
Problem Phenomenon
Products crack at the client side after leaving the factory.
Cause Analysis
Residual stress is not eliminated and is released and cracks during transportation/use.
Solution
①Anneal at 70~80℃ for 2~4 hours; ②Slow cooling after annealing; ③Full inspection of stress-sensitive parts with polarized light.
Key Takeaway
Annealing = the factory insurance for transparent structural parts.
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