1. Extruder temperature or resin temperature is too high, causing resin to decompose and produce odor.
2. The air gap is too large, the resin is oxidized excessively, and various oxygen-containing groups with peculiar smell are generated on the surface, which makes the composite film produce odor.
3. The resin itself has peculiar smell, and the composite film after extruding and compounding with it will also have peculiar smell.
4. The use of high-boiling, non-volatile solvents in the primer will cause some solvents to remain and cause peculiar smells in the film after the compounding.
1. Appropriately lower the extrusion temperature to prevent the resin from decomposing.
2. Adjust the size of the air gap to an appropriate value.
3. Use low-odor resin for extrusion compounding.
4. Increase the drying temperature of the drying tunnel and increase the amount of air blowing to ensure that the solvent is fully dried.