Sealing Process

Making sure you have a repeatable and reproducible heat-sealing process is key to ensuring proper sealing, maintaining the sterile barrier, and passing testing. By understanding how to address and control sealing variables, you can achieve a proper seal. Below are the major factors that could affect your heat-sealing process.


Temperature has the greatest impact on your sealing process. Are your heat-sealing temperatures high enough to activate the sealant layer, while not over sealing the package?

Dwell Time

Dwell time has the second biggest influence on your sealing process. Does your dwell time allow for adhesives to properly activate and bond to the packaging materials?


The proper amount of pressure paired with dwell time and temperature is crucial to achieving a proper seal. More pressure is not always better. Instead of adding more pressure, can you adjust your dwell time or temperature to achieve a desired seal?

Material Choice

Based on your material choice, the sealing window can vary. Have you adjusted the sealing parameters for your chosen materials?


Does your sealing system have a consistent temperature that is evenly distributed? Are there monitoring/notification systems in place to prevent an operator from sealing a package in an invalid temperature range?
No matter what your healthcare packaging requirements or needs are, Oliver offers a wide variety of innovative and cost-effective solutions that provide high-value and superior performance.
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Whether you need pouches for testing and validation, are starting a new project, or simply require pouches to help cover inventory, we can help you meet your goals with our DuPont™ Tyvek® Pouches. Available in various sizes.

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Need to understand the root cause for sealing failure?

If your packaging fails testing, it's important to consider the full process to identify the root cause of failure.
Download this checklist to get started.

What should your seal strength be?

Seal strength in medical device packaging is critical, and must stand up to the real-world stress of sterilization, distribution and product load. For more than 40 years, industry professionals have been asking: What should my minimum value be, and how do I meet the 1.0 lb. seal strength standard?
Learn more about seal strength here.
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Still not sure where to start?

From design, testing, and shipping, to storage and usability, it can be a challenge knowing where to start a packaging project. If you are unsure how to begin, contact our experienced packaging development team for assistance.
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