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OTR and WVTR rates dependency on biological activity inside pouch


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#1 Zeeshan

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Posted 02 January 2018 - 05:20 AM

I would like to know whether OTR and WVTR rates have any relation with biological intrusion or biological activity inside the retort pouch?

 

Regards.

Zeeshan.



#2 David Levy

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Posted 06 January 2018 - 03:20 PM

In principal, OTR and WVTR values as specified in  the DS, are the packaging material properties. The meaning – they are measured at specific conditions as per the related standard (ASTM, ISO etc.).

 

For a specific package the OTR and the WVTR depend on the concentration difference of the oxygen or water vapor between the 2 sides of the package – as the general case of diffusion.  In case the biological activity changes those concentrations, the rate will change as well.

 

Regards,

David Levy



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