GTR, gas transmission rate, is the rate at which a specified gas permeates through a stated area of a specimen under certain time period, pressure and temperature condition.  OTR, oxygen transmission rate is the rate at which oxygen transmits through a stated area of a specimen under certain time period. The above mentioned transmission can also be expressed as permeation or permeability. For more information, please visit www.labthinkinternational.com.cn.

The testing subjects of GTR and OTR are mainly plastic films and sheets, such as plastic films, laminated films, high barrier materials, back sheets, construction thermal insulation and water proof materials, battery diaphragms as well as packaging bottle and pouch containers, etc.

The measurement of GTR and OTR is of great significance. As to food and pharmaceutical products, the barrier performance of the packaging materials would directly influence the quality and shelf-life of the contents. Through GTR and OTR measurement, the specific gas permeation/barrier performance of certain packaging material can be learnt, so as to help improve packaging material selection and confirm perfect protection for products during production, transportation, storage and shelf-life period. Thus, greatly reduce costs and improve product quality.

GTR and OTR are measured by gas/oxygen transmission analyzer. Labthink Instruments, as the world leading permeability/barrier tester researcher and manufacturer, devotes to the permeation method research and instrument development. Labthink PERME series of testing instruments have complete permeation solutions for gas, water vapor and organic gas. The new innovative Labthink PERME DM2/330 Differential and Equal Pressure Method Gas Permeability Tester can measure the gas transmission rate of plastic film, sheets and containers with differential pressure method and equal pressure method, the two recognized methods.

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