 Corey Hensel DDL Inc. Director of Operations Visit Website |
Corey Hensel has more than 14 years of experience in the package and product testing industry. As Director of Operations, he is responsible for DDL’s processes and operational efficiency across all three of DDL’s facilities. He is also responsible for ensuring all tests are performed in accordance with the most current industry standards and meets the quality standards established through DDL’s ISO 9001 certification. Hensel is Chair of the ASTM D10.23 committee, a member of the Institute of Packaging Professionals (IOPP) and TAPPI.
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Package Testing Q&A
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Asked April 28th, 2009
I am not aware of any industry accepted procedures or best demonstrated practices for measuring finished packages internal vacuum or pressure. I contacted Mr. Heinz Wolf, general manager, at PTI Industries, Packaging Technologies and Inspection, for some suggested measurement insight, as they are leaders in non destructive leak testing Depending on your starting package vacuum, their nondestructive leak testing equipment can be utilized to derive an internal package vacuum by observing the pressure value on their equipment at the moment that the evacuated package starts to “expand” as additional vacuum is pulled on the already evacuated package.
The greatest vacuum that can be applied to the evacuated package is absolute vacuum at 29.93 in Hg. If your packages are very close to absolute vacuum (resulting from your vacuum sealing process) then no method is viable for determining internal package vacuum as insufficient pressure differential exists in order to measure vacuum.
This method requires PTI Industries equipment or similar equipment with sophisticated pressure transducer systems for accurate pressure and negative pressure generation and measurement.
