EUROLAB laboratory provides testing and compliance services within the scope of JIS K-7126 standard. This Japanese Industry Standard JIS K-7126 serves to determine the rate of passage of gas (eg O2, CO2, N2 and their mixtures) through the plastic film and consequently the suitability of such films for packaging sensitive products, for example. It cannot be used for gases that tend to chemically react with the sample material and condense.
The gas transmission rate is measured by determining the volume of gas passing through the sample under specified conditions, which is suitable for determining gas transmission rates ranging from about 3 cm3/(m².d.bar) to 20 000 cm3. Since the gas transmission rate is dependent on the thickness of the product, reproducible results can only be obtained with samples of equal thickness. For homogeneous materials, the gas transmission rate is generally inversely proportional to the thickness.
Samples shall be taken from areas evenly distributed over the surface of the material under test and shall be circular in diameter (approximately 100 mm) depending on the dimensions of the test equipment used. They shall represent the material and shall not contain marks or visible defects (eg holes, wrinkles).
Unless otherwise stated, at least two samples will be tested in one direction. Samples of hygroscopic material must be conditioned before testing at (23 t 2)°C in the chosen atmosphere, the time depends on the material being tested.
The preconditioned sample is mounted in the test cell to form a sealed barrier between the two chambers. The low pressure chamber (lower chamber) is evacuated first, then the entire cell is emptied. After that, a gas flow is introduced into the evacuated high-pressure chamber (upper chamber) and a constant pressure (adjustable) difference is created between the two chambers. The gas passes through the sample from the high pressure side to the low pressure side. The gas permeability of the sample can be obtained by analyzing pressure changes in the lower chamber.
Our company, EUROLAB, also provides JIS K-7126 Test Method testing services for the Gas Transmission Rate of Plastic Films and Coatings, within the framework of laboratory services of materials. Do not hesitate to contact our laboratory EUROLAB for your testing and certification requests.
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EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
