Vacuum-sealing works, but not always
In industrial packaging, vacuum packaging is often seen as the “ultimate” solution.
In reality, it is an extremely effective technology only when the product and the process are compatible with its principles.
The principle is simple: remove the air to improve shelf life and stability.
But this very compression can become a limitation in certain applications.
For an overview of the available technologies, please visit the page on automatic vertical packaging machines.
Products that warp or become damaged
One of the main limitations concerns products that are sensitive to compression.
By reducing the internal volume, vacuum packing exerts pressure on the contents, which can alter their structure.
This happens, for example, with:
- fragile items
- light, loose mixtures
- materials with an irregular structure
In such cases, the bag may appear misshapen or the product may lose some of its quality, which directly affects the final impression.
To mitigate this phenomenon, one can implement a proportional and gradual control of the desired vacuum level to limit its negative effects, which must be assessed on a case-by-case basis.
Products that release gas over time
Another critical issue concerns products that tend to release gas after packaging.
Even when the initial vacuum is correct, the bag can change over time, swelling and losing its stability.
This phenomenon is typical of:
- food products containing residual biological activity
- organic materials
- mixtures subject to fermentation or chemical reactions
The result is packaging that does not hold its intended shape, which has negative effects on logistics and aesthetics.
Aesthetic and Commercial Limitations of Vacuum Packaging in Industrial Applications
Vacuum packaging produces compact, “rigid” bags that are highly efficient from a logistical standpoint.
However, this characteristic is not always a commercial advantage.
In some industries, a bale that is too compact can be perceived as:
- less visually appealing
- less bulky
- less appealing on the shelf
This aspect is particularly important in retail settings, where the aesthetic appeal of a product directly influences purchasing decisions.
When the process becomes more complicated than necessary
Vacuum packaging requires precise control of key parameters: extraction time, pressure, and sealing.
If the product does not actually require this technology, there is a risk of introducing unnecessary complexity without any real benefit.
In such cases, a simpler solution can ensure:
- higher production speed
- lower operating costs
- less process variability
As already noted in the article on vacuum packaging for food and chemicals, the benefit exists only when it is consistent with the product.
Alternatives to industrial vacuum packaging
When vacuum packing isn't the best option, there are more suitable alternatives.
Here is a list summarizing the main points:
- standard controlled-atmosphere packaging
- optimization of the uncompressed format
The choice always depends on the product's physical properties and on storage and logistics objectives.
The real question: What does the product actually need?
The key point is not to choose the most advanced technology, but the most appropriate one.
Each product has specific characteristics: density, structure, adhesion, slip resistance, hygroscopicity, long-term performance, etc.
Implementing vacuum packaging without this analysis risks inefficiencies, waste, or suboptimal results.
The right approach always starts with:
- product analysis
- real-world tests
- simulation of the bag's behavior
Choosing the right technology means avoiding hidden costs
In industrial packaging, choosing the wrong technology can lead to hidden costs that are difficult to recoup.
Knowing when vacuum packaging isn’t the right solution is a sign of technical and design maturity.
To assess how your product performs and identify the most effective solution, you can contact the VAI team VAI the contact page.
The approach we take in developing these solutions
- MV305 — VFFS packaging line with a vacuum carousel, for bags holding up to 25 kg of powdered and granular products. This configuration is designed to ensure an extended shelf life, protection against atmospheric contamination, and pallet stability during long-distance transport.
- VS99 and TFD — alternative configurations based on the requested format and finish.
Sectors where vacuum packaging has the greatest impact: dried fruits and legumes, flour products, rice, and grains.
