Material Analysis
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PMMA and PC Comprehensive Selection
Problem Phenomenon
Transparent parts switch repeatedly between PMMA and PC, encountering problems of both materials
Cause Analysis
PMMA transmits 92% light, has good weather resistance and is easy to polish but is brittle; PC has 15-20 times the impact resistance but needs UV protection and its surface is easily scratched; the two have completely different processing windows and post-treatments
Solution
①Select materials with a four-dimensional matrix of impact, weather resistance, scratch resistance, and cost; ②clarify division of labor in mixed-use scenarios; ③create independent process parameter files by material; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PMMA and PC are complementary transparent duo; matrix-based selection plus independent process files end repeated switching; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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