The package sealing process is designed to ensure that the contents reach the consumer in optimal conditions of safety, freshness, and preservation. However, there is one factor that is often underestimated and can seriously compromise the effectiveness of the closure: moisture.
At SM Tecnic, we know well the effects that moisture can have on the edges of the package, on the sealing film, or even in the production environment. That’s why we have developed specific solutions to guarantee reliable sealing even under demanding environmental conditions.
Why is moisture a problem in sealing?
Moisture can affect both the adhesion process of sealing and the quality of the final result. Some of the most common issues caused by its presence are:
- Lack of adhesion between the seal and the package edge.
- Partial seals or with air bubbles.
- Accidental detachment of the seal after closure.
- Microbiological contamination in critical areas of the package.
- Corrosion or alteration of metallic layers, in the case of aluminum seals.
These failures not only compromise the integrity of the package but can also lead to complaints, production losses, or even product recalls.
Where can moisture appear?
In automated packaging lines, moisture can appear at different stages of the process:
- After filling the product, if it is at high temperatures (e.g., hot sauces), condensation can form on the walls of the package.
- During handling, when working in environments with high relative humidity or without environmental control.
- During prior storage, if sealing materials are not properly protected.
Even small amounts of moisture are enough to affect the seal adhesion, especially in plastic packaging and in products that require high tightness.
Effective solutions to avoid moisture problems
From our experience in industrial projects, at SM Tecnic we apply various strategies to minimize the impact of moisture and ensure a hermetic and safe seal:
1. Choosing the right sealing system
Systems such as Inducseal or Induflex, based on induction sealing technology, offer greater resistance to adverse conditions than pressure sealing, as the generated heat ensures better adhesion even with a certain degree of moisture.
2. Use of moisture-resistant materials
We offer seals developed with multilayer structures that maintain their sealing properties even when the surface is not completely dry.
3. Control of the production environment
We recommend implementing dehumidification systems in critical areas and working within controlled relative humidity ranges. The installation of condensation detectors or air-drying stations can prevent many problems.
4. Surface treatments prior to sealing
In some cases, hot air, infrared, or vacuum cleaning systems can be applied to remove residual moisture from the edge of the package just before sealing.
5. Technical validation tests
Each production line has different particularities. That’s why at SM Tecnic we carry out real tests with packaging, products, and specific conditions of each client to validate the most effective solution before implementation.
Moisture is one of the invisible enemies of industrial sealing, but with proper process design, quality materials, and technical control, it is possible to minimize its impact. At SM Tecnic, we work closely with manufacturers from different sectors to ensure that each package fulfills its function: protecting the product until consumption.
If you are experiencing adhesion issues, micro-leaks, or problems in humid environments, our technical team can help you find an effective solution tailored to your line.
Contact us for a personalized diagnosis.
