Flow wrapping is one of the fastest and most reliable packaging methods used across the food, medical, pharmaceutical, cosmetic and industrial sectors. When correctly set up, a flow wrap machine produces consistent, high-quality packages at high speeds with minimal waste.
However, even the most advanced machines can occasionally experience problems. Poor seals, wrinkled film, registration errors and product timing issues can all affect packaging quality and reduce production efficiency.
The good news is that many of these issues have simple causes and can often be resolved with a few adjustments. Understanding what causes common flow wrapping problems allows operators to minimise downtime, reduce waste and keep production running smoothly.
This guide explains the most common flow wrap machine problems, what causes them and how to fix them.
Flow wrappers rely on several systems working together perfectly:
When one component falls out of adjustment, packaging quality can quickly suffer.
Some of the most common causes include:
Fortunately, most issues can be identified quickly using a systematic troubleshooting process.
Operators most commonly experience:
Let’s look at each problem in more detail.
The longitudinal seal runs along the length of the package and is essential for maintaining package integrity.
If products require airtight packaging, leaking seals can lead to contamination, moisture ingress and reduced shelf life.
Film wrinkles reduce product appearance and may interfere with sealing.
Film should travel straight through the machine.
When it drifts sideways, the package may become uneven.
Printed packaging requires accurate registration.
When registration is incorrect, graphics and logos may appear in the wrong position.
The product must arrive precisely between the sealing jaws.
Incorrect timing causes damaged products and wasted packaging.
Packages should leave the machine centred and symmetrical.
Crooked packages usually indicate alignment issues.
Product jams are among the biggest causes of downtime.
Unexpected stops can interrupt production and reduce efficiency.
Preventative inspections take only a few minutes but can prevent hours of downtime.
Daily checks should include:
Once per week operators should:
Monthly inspections should include:
Before calling for technical support, check the following:
Working through this checklist often resolves common problems without lengthy downtime.
The most effective way to avoid production issues is through preventative maintenance and proper operator training.
Best practices include:
A proactive maintenance programme reduces waste, improves productivity and extends machine life.
If recurring faults continue after following standard troubleshooting procedures, professional assistance may be required.
At SA Packaging Machinery, we provide expert support, machine servicing, operator training and preventative maintenance for flow wrap machines across South Africa. Our experienced team can help diagnose packaging issues, improve machine performance and minimise costly downtime.
Contact us today to schedule a service, request technical support or discuss the best solution for your packaging operation.
Poor sealing is usually caused by incorrect sealing temperatures, worn sealing jaws, insufficient pressure, dirty sealing surfaces or unsuitable packaging film.
Film wrinkles are commonly caused by incorrect film tension, poor tracking, worn rollers or incorrect forming box adjustments.
Leaks are usually caused by weak end seals, poor longitudinal seals, damaged film or product contamination within the seal area.
Daily cleaning, weekly inspections and scheduled preventative maintenance help maintain reliable performance. The exact servicing interval depends on production volumes and operating conditions.
Routine maintenance, regular inspections, operator training, quality packaging film and replacing worn components before failure are the most effective ways to reduce downtime.
