Understanding the Oxygen Transmission Rate (OTR) of your packaging is fundamental to ensuring product quality and shelf life. As a supplier, we know that precise OTR data helps you select the right materials to protect your products from oxidation. This knowledge is vital for preventing spoilage, maintaining freshness, and meeting regulatory requirements. Ultimately, it empowers you to make informed decisions that enhance your product’s integrity and customer satisfaction.

Oxygen Transmission Rate Measurement

The OTR test is a standardized procedure to quantify the amount of oxygen gas that passes through a unit area of a packaging material over a 24-hour period under specific conditions of temperature and humidity. This measurement is critical because oxygen ingress is a primary cause of product degradation, leading to spoilage, rancidity, and loss of potency in sensitive goods like food and pharmaceuticals. The test is performed using specialized equipment known as an OTR tester. This instrument creates a controlled environment where one side of the film sample is exposed to oxygen while the other side is flushed by a carrier gas, which transports the permeated oxygen to a sensor for precise measurement. The resulting OTR value, typically reported in cc/m²/day, provides a definitive metric for a material’s barrier performance.

Material Barrier Property Evaluation

Evaluating the barrier properties of packaging materials is a core application of OTR testing. This evaluation directly informs material selection and development, helping to match the packaging’s oxygen barrier level to the specific sensitivity of the product inside. For instance, a fresh salad requires a different barrier than roasted coffee or a medical device. The data from these tests allows for comparative analysis between different polymers, multi-layer laminates, and coated films. Labthink provides the technology that enables this critical analysis. By understanding the exact OTR, manufacturers can optimize their packaging structures, potentially reducing material usage without compromising protection, or identifying the need for high-barrier layers to extend a product’s shelf life effectively and reliably.

Packaging Quality Control Test

In a production environment, OTR testing serves as an essential quality control check to ensure consistency and reliability. Raw material batches can vary, and manufacturing processes like extrusion or coating can introduce inconsistencies that affect the final barrier performance. Regular OTR testing on incoming materials and finished packaging provides a quantitative safeguard against these variations. This proactive monitoring helps prevent costly recalls and product waste by catching off-spec materials before they enter the production line. It verifies that every batch of packaging meets the predefined specifications required to protect the product. Implementing a robust OTR QC protocol is a fundamental step in maintaining brand integrity and ensuring that consumers receive a product that is fresh, safe, and of high quality.

Conclusion

We at Labthink manufacture Oxygen Permeability Testers, also known as Oxygen Transmission Rate (OTR) testers. Our instruments are designed to measure the oxygen transmission rate of films, sheets, and packaging containers. The testers conform to the ASTM D3985 standard test method and utilize a coulometric sensor. Our product line includes models that can test oxygen permeability for packaging films and containers, and systems testing water vapor transmission rate, providing a comprehensive solution for your barrier testing needs with our OTR tester for food packages and other applications.