RevA/May 2012 www.raytek.com SUCCESS STORY 68 WEB MONITORING OF SEMI-PERMEABLE FILMS KEY FACTS Industry Consumer electronics batteries and automotive electric cars Customer’s End Product Semi-permeable film Process Temperatures 120-130°C/248-266°F How can a semi-permeable film manufacturer know if their film has the correct permeability? Situation and background Inside a NiCd or lithium ion battery is a semi

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