Trial design and interpretation
Agree low-temperature tests before and after aging on the same specimen and record temperature, duration and thickness. If a freshly prepared specimen passes but hardens after aging, check both weight loss and flexibility change.
Recording Density at 20 °C
Density at 20 °C (g/cm³): ENVO published specification 0.913–0.919. Test at the same temperature and verify against ester composition and the supplier’s COA. Mass loss on heating (% by mass): ENVO published value ≤0.2. Two hours at 125 °C. Use the same test portion mass and container.
Can a part that passes initial cold bending harden after ageing?
Heat-age the same specimen as agreed, then repeat cold bending and measure weight loss to distinguish initial performance from durability. Low-temperature cable jackets: Use the current resin and test bending, impact and cracking at the intended service temperature.
What to record
- Specimen thickness
- Aging conditions
- Mass change
- Cold-bend result
Technical references
Products and processes
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