Vacuum Sealer Vs. Impulse Sealer: Understanding The Differences

As technology advances, the variety of tools available for preserving and packaging goods increases. Two common devices used for sealing are vacuum sealers and impulse sealers. These appliances, although similar in purpose, serve very different functions and are ideal for different situations.

A vacuum sealer removes air from a package before sealing it, while an impulse sealer uses heat to create an airtight seal without removing the air. This fundamental difference dictates the suitability of each tool for various applications, particularly in food preservation and industrial packaging.

Functionality and Mechanisms

Vacuum Sealers: Vacuum sealers primarily serve the function of extending the shelf life of food products by removing oxygen, which bacteria need to grow. The mechanism involves placing the food item in a specially designed vacuum bag, inserting the open end into the machine, and allowing the sealer to extract the air. Once the air is evacuated, the machine uses heat to seal the bag, creating an airtight environment. These sealers come in two main types: external vacuum sealers and chamber vacuum sealers. External sealers are typically used for home applications and smaller batches, while chamber sealers are more robust and suitable for commercial use.

Impulse Sealers: Impulse sealers, on the other hand, create seals using brief bursts of heat. They do not evacuate the air from the packaging but instead rely on heating elements to melt and bond the overlapping layers of plastic or other thermoplastic materials. This method is quick and efficient for sealing bags containing items that don't require vacuum preservation, such as snacks, powders, and non-perishable goods. Impulse sealers come in various sizes and typically include a timer to ensure consistent sealing.

Applications and Use Cases

Foods and Perishables: When it comes to food preservation, vacuum sealers are unmatched. They are particularly effective for perishable items such as meats, cheeses, and fresh produce. By removing air and sealing the bag, the food's freshness is prolonged, flavors are locked in, and freezer burn is prevented. This is especially beneficial for sous-vide cooking, where food is cooked in airtight bags in water baths at precise temperatures.

Non-Food Items: Impulse sealers are versatile tools used for a wide range of packaging needs. They excel in applications where the integrity of the bag's seal needs to be ensured without removing air, such as packaging small parts, crafting materials, documents, and products for retail. Their ability to create strong, consistent seals makes them ideal for industries like electronics, pharmaceuticals, and hardware, where the contents must be protected from dust, moisture, and contamination.

Cost and Maintenance

Cost Considerations: In terms of cost, impulse sealers are generally less expensive than vacuum sealers. The simpler design and fewer moving parts result in lower prices and fewer maintenance requirements. Vacuum sealers, particularly chamber models, can be a significant investment due to their complex mechanisms and the need for special vacuum bags designed to withstand the vacuum process.

Maintenance: Maintenance for vacuum sealers can be more intensive due to their regular use and the potential for food residue buildup in gaskets and seals, which may require cleaning and replacement over time. Impulse sealers, being simpler and more straightforward, often require less maintenance. Occasional replacement of heating elements and Teflon covers is usually sufficient to keep an impulse sealer in good working condition.

Longevity and Efficiency

Longevity: Both vacuum and impulse sealers, when properly maintained, can offer many years of reliable service. The longevity of a vacuum sealer largely depends on the quality of the machine, the frequency of use, and adherence to maintenance protocols. High-end models tend to last longer and handle more intensive use.

Efficiency: Efficiency is another key difference. Vacuum sealers, due to their more complex operation, take longer to seal products compared to impulse sealers, which can create a sealed package in a matter of seconds. However, the time investment in vacuum sealing is often justified by the extended shelf life of vacuum-sealed products, particularly food.

Conclusion

In conclusion, the choice between a vacuum sealer and an impulse sealer hinges on your needs and intended applications. If your primary goal is to preserve perishable food items and extend their shelf life, a vacuum sealer is the optimal choice. For tasks that require quick, efficient sealing without the need to remove air, an impulse sealer is the more practical solution. Both tools offer unique benefits and understanding their differences can help you make an informed decision suited to your specific requirements.

FAQ

Can I use an impulse sealer for food preservation? 

Yes, but it won't remove air from the package, which is essential for extending the shelf life of perishable items.

Are special bags required for vacuum sealers? 

Yes, vacuum sealers often require specific types of bags designed to withstand the vacuum process.

Is it possible to seal liquids with a vacuum sealer? 

Yes, especially with chamber vacuum sealers, which are designed to handle liquid or moist foods more effectively than external sealers.

Do impulse sealers only work with plastic? 

Impulse sealers work primarily with thermoplastic materials, but they can also seal other materials like foil or Mylar with the appropriate settings.

Are vacuum sealers worth the investment for home use? 

Absolutely, especially if you frequently store perishable items or enjoy sous-vide cooking, as they significantly extend the shelf life and quality of food.