Abstract:

Permeation measurements are crucial to targeting a package’s sweet spot. This sweet spot is defined as the intersection between effective marketing, product protection and cost. When all three areas combine, a functional, cost-effective package that meets its shelf life requirements is developed. However, the product protection segment is often overlooked and can have a significant impact on the other segments, especially the cost.

In this article we make a review of Most common techniques for transmission rate measurement of sheets include challenging one side of the material with the permeant (test gas) while the other side is swept with a carrier gas. The material is placed in a diffusion cell, separating it into two chambers. The inner chamber is flushed with nitrogen carrier gas and the outer chamber contains the permeant. Molecules of permeant diffuse through the film to the inside chamber and are carried to the sensor by the carrier gas.