When it comes to testing the gas barrier properties of packaging materials, the choice between traditional oxygen permeation analyzers and Labthink’s specialized solutions directly impacts quality control accuracy and operational efficiency. Understanding their core differences is crucial for industries relying on precise oxygen transmission rate (OTR) data to preserve product shelf-life and safety. We provide this guide to help you accurately assess the barrier properties of your materials. Proper operation ensures reliable data for your quality control and research and development efforts. This knowledge helps you make informed decisions about material selection and packaging design.

Oxygen Transmission Rate Measurement

To measure the Oxygen Transmission Rate (OTR), you must first prepare a specimen by cutting it to fit the instrument’s test chamber, ensuring it is free of wrinkles or defects. The sample is then securely clamped to create a sealed barrier between two chambers. On one side, a flow of pure oxygen or air is established, while the other side receives a carrier gas, typically nitrogen. The instrument detects the oxygen molecules that permeate through the film and are carried by the nitrogen to a sensor. The system measures the rate of oxygen flow, calculating the OTR value under controlled temperature and humidity conditions. Accurate results depend on proper specimen mounting and stable environmental control. This process is fundamental for evaluating packaging performance using specialized OTR testing equipment.

Gas Barrier Property Analysis

Gas barrier property analysis using an oxygen permeation analyzer involves interpreting the OTR data to understand a material’s protective capabilities. A low OTR value indicates a high barrier, meaning the material effectively prevents oxygen from passing through, which is vital for preserving oxygen-sensitive products. The analysis helps in comparing different materials, multi-layer structures, or the impact of production processes on barrier performance. Traditional devices typically focus solely on OTR measurement, providing limited insights into comprehensive barrier performance. Labthink analyzers, by contrast, leverage OTR data to enable in-depth comparison of materials, multi-layer structures, and production process impacts. Moreover, flagship models like the C403H and C406H go beyond OTR testing to measure water vapor transmission rate (WVTR), offering a holistic view of packaging protection capabilities—an essential advantage for evaluating materials used in oxygen and moisture-sensitive products.

Instrument Calibration Procedure

The calibration procedure is critical for maintaining the accuracy of an oxygen permeation analyzer. We recommend performing calibration regularly using certified standard reference films with a known, traceable OTR value. The process involves running a test on this reference material exactly as you would an unknown sample. The measured OTR result is then compared against the certified value provided with the standard film. Labthink emphasizes regular calibration using certified standard reference films with known, traceable OTR values. The process includes verifying sensor response, gas flow stability, and environmental control accuracy, with mandatory documentation to ensure data integrity and compliance with quality standards. Additionally, Labthink’s instruments adhere to the ASTM D3985 standard test method.

Conclusion

In conclusion, while traditional oxygen permeation analyzers can meet basic testing needs, Labthink’s solutions stand out through simplified operation, comprehensive testing capabilities, strict calibration protocols, and adherence to industry standards. We at Labthink manufacture Oxygen Permeability Testers, also known as Oxygen Transmission Rate (OTR) testers. For comprehensive material analysis, specific models, such as the C403H and C406H, can also test the water vapor transmission rate (WVTR) of packaging materials, providing a more complete picture of barrier performance with our oxygen permeation analyzer.