Troubleshooting guide for Stretch Cling Wrap Film Applications
Stretch Cling Wrap Film Troubleshooting
Problem
Probable Cause
Suggested Remedy
Temperature Setting
Temperature setting are crucial parameter for proper plastic processing ,hence one should check temperature controller, thermocouple and solid state relay(SSR)
- when you cold start the machine ,wait for 2hours.
Uneven tack or cling
Uneven dispersion of PIB in the film
No tack or cling effect
- PIB addition insufficient
- PIB getting degraded due to high barrel temperatures
- Poor PIB migration to the surface due to higher crystallinity
- Increase PIB addition
- Decrease barrel temperatures
- Increase cooling or chilling of the film immediately
Variable tack
- Rate of cooling of film not uniform due to frost line moving up or down, dimension of bubble changing leading to change in bubble diameter
- Film is not used under similar conditions prior to testing
- Maintain uniform cooling rate by controlling frost line height and by uniform film dimensions
- Maintain similar aging conditions
Telescoping of rolls during storage
- High or uneven reeling tension of rolls
- Incorrect storage conditions
- Uneven film thickness
- Poor quality of cores
- Optimise the reeling tension
- Store the rolls at 20–30°C
- Maintain uniform film thickness
- Use good quality cores
Noise during unwinding
- High peel adhesion
- High stiffness modulus and crystallisation characteristics of the film
- Careful control of cooling of the film immediately after extrusion
- Use of blends of LLDPE with LDPE, selection of more flexible, lower stiffness polyethylene
Film breaking in wrapping machine
Poor mechanical strength
| Improve the mechanical strength by modifying the raw material combination suitably |
