Vertical tube film machine: how to determine film, seal and throughput for bulk products

May 1, 2026


Dust formation, torn bags or a faltering production line costs a lot of time and money. When packaging heavy bulk goods, the process always demands extreme precision. An incorrect technical setting directly leads to unwanted product loss and costly downtime. How do you set up your industrial packaging process in a truly optimal way?

The right film for your bulk product

Selecting the right packaging film is always the first crucial step. Every bulk product has specific properties and therefore requires a completely different type of protection. Sharp granulates, for example, require a thicker and very puncture-resistant film layer. Fine powders, on the other hand, benefit enormously from a high moisture barrier.

Why the seal makes the difference

A reliable seal guarantees the complete integrity of your packaging during transport. With a vertical tube film machine, the transverse weld is absolutely the most essential. Dust or product residues in the welding zone unfortunately quickly cause weak spots and leaks. Therefore, always choose an advanced sealing system that detects contamination directly and accurately.

Optimising throughput and capacity

The desired production capacity ultimately determines the final configuration of your industrial machine. A higher throughput must naturally never be at the expense of the final weld quality. Therefore, always align the dosing speed extremely precisely with the sealing time of the machine. This effectively prevents annoying bottlenecks in your complete packaging line.

Integration with your existing process

A new machine must always seamlessly connect to your already existing infrastructure. At Votech, we carefully look at your complete decision-making process and current production line. We offer an integrated portfolio of high-quality solutions for the entire industrial sector. As a total solutions provider, we guarantee an extremely efficient operation of your complete installation.

Technical precision and structural maintenance

Continuous top performance always requires regular maintenance and a very high degree of technical precision. Wear on sealing bars or cutting blades directly affects the packaging quality. Therefore, pay careful attention to the following factors for absolutely optimal and trouble-free operation:

  • Check the exact temperature of the integrated sealing bars in the machine weekly.
  • Clean the film feed regularly to minimise unwanted friction during the process.
  • Schedule preventive maintenance in good time via our extensive and professional Duravant Lifecycle Services.

Frequently asked questions about the vertical tube film machine

How do I prevent dust in the seal with powders?

Use a closed dosing system that reaches very deep into the bag. This significantly minimises the upward dust displacement during filling of the bags. In addition, a powerful extraction system at the filling spout helps to remove all residual dust.

Can I increase throughput without quality loss?

Yes, you do this by optimising the cooling time of the seal. Also, using servo-driven film transport significantly increases the processing speed of the machine. Always consult a technical expert to determine the absolute limits of your film.


Conclusion

Correctly setting the film, seal and throughput is absolutely essential for maximum return. With the right vertical packaging machine, you minimise product loss and maximise operational efficiency. Are you looking for a reliable partner for your complex industrial packaging challenges? Contact Votech directly and discover our leading and innovative solutions.