EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 15106-4 testing. ISO 15106-4 specifies an instrumental method for determining the water vapor transmission rate of single-layer plastic film and sheet, as well as multi-layer structures, including plastics, using a gas chromatograph. The method provides rapid measurement at a wide range of water vapor transmission rates.
A dry room evacuated by a vacuum pump is separated by a test sample from a wet room in which the relative humidity of a gas stream is controlled at a certain level. The water vapor delivered through the sample is collected in a sampling cycle for a specified period of time. The absolute mass of the collected water is measured using a gas chromatograph. The water vapor transmission rate is then calculated from the delivered water vapor mass, the time and the transmission area of the sample.
Samples with thicknesses determined in accordance with ISO 4593 should be conditioned at the same temperature and humidity specified for testing for a period appropriate to the material being tested, unless otherwise agreed between the parties concerned.
The apparatus includes a two-chamber gas delivery cell, a sampling loop to trap the penetrating water vapor, switching valves, a gas chromatograph, a humidity controller (water chamber) and a vacuum pump.
Using a liquid syringe, inject a known volume of each solution into the gas chromatograph and record the chromatogram for each under the same conditions. Determine the peak area in the chromatogram corresponding to the injected water.
EUROLAB assists manufacturers with ISO 15106-4 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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