What is ISO 2528:2017 Sheet materials-Determination of water vapour transmission rate (WVTR)-Gravimetric (dish) method?
ISO 2528:2017 is a standard that specifies a gravimetric (dish) method for determining the water vapor transmission rate (WVTR) of sheet materials.
The WVTR of a material is the rate at which water vapor can pass through the material. This is an important property for materials that are used in packaging or other applications where water vapor can have a detrimental effect on the contents.
The gravimetric (dish) method involves placing a sample of the material in a dish and exposing it to a controlled environment of water vapor. The dish is weighed at regular intervals to determine the amount of water that has passed through the sample. The WVTR is then calculated based on the weight loss of the dish over time.
ISO 2528:2017 provides guidance on the equipment, procedures, and calculations necessary to perform the gravimetric (dish) method for determining the WVTR of sheet materials. The standard also includes recommendations for the conditioning of the test samples and the calculation of the WVTR values.
Requirements of ISO 2528:2017
Sample preparation: The sample should be representative of the material being tested and should be conditioned to a specific temperature and humidity before testing. The sample should be placed in a dish of a specified size and shape.
Testing conditions: The dish containing the sample should be placed in an environment with a controlled temperature and humidity. The temperature and humidity should be maintained at specific levels throughout the test.
Testing duration: The test duration should be at least 24 hours and can be extended to up to 7 days. Depending on the expected WVTR of the material.
Weighing: The dish and sample should be weighed at specific intervals during the test to determine the amount of water that has passed through the sample.
Calculation of results: The WVTR should be calculated based on the weight loss of the dish over time. The standard provides specific equations for calculating the WVTR based on the test conditions and sample size.
Reporting: The test report should include details of the sample preparation, testing conditions, test duration, and WVTR results. The report should also include any deviations from the standard test method.
Therefore, The standard provides a detailed and standardized method for determining the WVTR of sheet materials using the gravimetric (dish) method. By following the requirements of the standard, users can ensure that their WVTR measurements are accurate. And comparable to other measurements made using the same method.
Benefits of this ISO Standard
Standardization: The standard provides a standardized method for determining the WVTR of sheet materials. This ensures that measurements made using this method are accurate and comparable across different laboratories and testing facilities.
Reproducibility: By following the standard test method, users can obtain consistent and reproducible WVTR measurements. This allows for reliable testing of sheet materials for various applications such as packaging, construction, and textiles.
Quality control: The gravimetric (dish) method provides a precise and accurate measurement of the WVTR of sheet materials. This enables manufacturers to control the quality of their products by testing and verifying the WVTR values of the materials used in their products.
Compliance: The standard can help manufacturers and testing laboratories comply with regulatory requirements for testing the WVTR of sheet materials. This can be especially important in industries such as food packaging, where regulations require specific levels of WVTR. To ensure product safety and quality.
Cost-effective: The gravimetric (dish) method is a cost-effective way of determining the WVTR of sheet materials. The method uses readily available equipment and does not require specialized testing facilities or expertise. Making it accessible to a wide range of users.
ISO 2528:2017 provides a reliable and standardized method for determining the WVTR of sheet materials using the gravimetric (dish) method. Which can benefit manufacturers, testing laboratories, and regulatory agencies alike.
Who needs ISO 2528:2017 Sheet materials- Determination of water vapour transmission rate (WVTR)-Gravimetric (dish) method?
ISO 2528:2017 is primarily intended for use by manufacturers, testing laboratories, and regulatory agencies involved in the production, testing, and regulation of sheet materials.
Specifically, the standard is relevant for any industry that requires sheet materials with specific levels of water vapor transmission resistance. Such as:
Packaging industry: Manufacturers of food, pharmaceuticals, and other products that require packaging with specific water vapor transmission rates can use the gravimetric (dish) method to test the WVTR of the packaging materials.
Textile industry: The standard is relevant for the testing of fabrics and textiles, where moisture resistance is an important property.
Construction industry: This standard can be used to test the moisture resistance of construction materials. Such as building wraps and insulation.
Research and development: Researchers and developers can use the standard to test the WVTR of new materials and compare them to existing materials.
In addition, regulatory agencies may require the use of the gravimetric (dish) method for testing the WVTR of sheet materials in certain industries to ensure compliance with safety and quality regulations.
Overall, anyone involved in the production, testing, and regulation of sheet materials with specific moisture resistance requirements can benefit from ISO 2528
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Read About : ISO 2505:2005