 |
| Problem |
|
Possible Cause |
|
Possible Solution |
|
| Film Thickness not uniform |
|
Non uniform lip setting |
|
Adjust die gap |
|
| |
|
Die temperature variation |
|
Modify die temperature profile |
|
| |
|
Uneven air flow from air ring assembly |
|
Adjust air flow |
|
| Seams or streaks |
|
Melt temp too low |
|
Increase melt temp |
|
| Wrinkling during collapsing |
|
Tube too cold and rigid |
|
Increase barrel/die temperature |
|
| |
|
|
|
Increase line speed |
|
| |
|
Uneven cooling through air ring |
|
Adjust air gap and velocity |
|
| |
|
Stabilizer system not properly balanced |
|
Adjust bubble stabilizer system |
|
| Variable lay flat width |
|
Unbalanced roll speed |
|
Adjust roll speed |
|
| |
|
Stabilizer system not set properly |
|
Adjust stabilizer system |
|
| |
|
Extrusion rate too high |
|
Reduce through put rate |
|
| |
|
Frost line not positioned properly |
|
Adjust processing temps and line speed |
|
