Injection Molding
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Decomposition and discoloration of ETFE in '2079851475616104452
Problem Phenomenon
ETFE injection molded parts become darker in color and appear brown
Cause Analysis
Processing temperature too high (>330°C); residence time too long; screw shear overheating
Solution
Control maximum temperature ≤320°C; shorten the cycle; use low-shear screw
Key Takeaway
ETFE has a narrow processing window and requires precise control of temperature and time
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