Molding Process
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PETG copolyester insufficient oil resistance
Problem Phenomenon
PETG products swell, stress crack or suffer performance decline when in contact with oils and fats.
Cause Analysis
Oil and fat molecules penetrate into the PETG matrix causing swelling and stress; PETG has limited resistance to oils and fats.
Solution
Evaluate the use environment and select a suitable material; for high oil resistance requirements, PCTG or PCTA can be selected.
Key Takeaway
PETG oil resistance is limited and needs evaluation according to the application environment.
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