EN
If your bag manufacturing machine runs fast but stacking becomes chaotic—bags flying, sticking together, miscounting, or jamming—static electricity is often the real cause. Static issues increase scrap and force operators to slow down, destroying your line’s effective capacity.
This guide explains:
- why static forms during film bag production
- how static damages stacking and counting
- the difference between active and passive static elimination
- a practical troubleshooting sequence for stable high-speed operation
1) Why Static Happens on Bag Forming and Stacking Lines
Static builds up due to:
- film friction over rollers and guides
- low humidity environments
- high line speed
- insulating materials (common PE films)
Static is worse with thinner films and higher slip additives.
2) Symptoms That Confirm Static Is the Problem
- bags cling to sealing jaws or knife area
- stacks lean or scatter at discharge
- miscounts on sensors
- dust attraction on film surface
- operators get frequent “shocks”
3) Solutions: Active vs Passive Static Removal
Passive (lower cost)
- antistatic tinsel
- grounded brushes
- proper machine grounding and bonding
Good for mild static but limited at high speeds.
Active (recommended for high speed)
- ionizing bars near critical points (before stacking, after cutting)
- closed-loop ionization systems (better stability)
Active systems neutralize charges faster and more consistently.
4) Where to Install Static Eliminators
High-impact locations:
- after slitting/cutting
- before stacking conveyor
- near discharge chute
- before printing (if relevant)
Also ensure all rollers and frames are correctly grounded.
5) Troubleshooting Checklist (Fast)
- Confirm grounding continuity machine-wide
- Measure humidity; raise if possible
- Clean rollers (dust increases friction)
- Add passive eliminators at discharge
- Upgrade to ionizing bar if speed is high
- Re-check sensor placement and shielding