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The term OTR related to packaging films stands for ________

(a) Overall Thermal Resistance

(b) Outer Tear Resistance

(c) Oxygen Transmission Rate

(d) Odour Transfer Rate

This question was posed to me by my school teacher while I was bunking the class.

This intriguing question comes from Diffusivity and Permeability in Plastics in division Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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Correct choice is (c) Oxygen Transmission Rate

The explanation: The term OTR related to packaging films stands for oxygen transmission rate. It is the rate by which oxygen permeates through a plastic film. The plastic films having a greater oxygen transmission rate are a poor barrier against gases, especially oxygen.

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