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Labthink Instruments Co., Ltd.
Permeability Testing of High Barrier Films

Permeability Testing of High Barrier Films

Product catalog summary

Overview of Permeability Testing for High Barrier Films
Permeability testing is crucial for assessing the gas transmission rate of films, particularly high barrier films, which are essential in the packaging industry due to their superior gas barrier properties. The permeability of films is categorized based on their gas transmission rate, with high barrier films having the lowest rate.

Importance of Testing Final Products
Packaging materials often undergo processes like coextrusion or lamination, which can alter their permeability. Therefore, testing the final product is vital to ensure quality. The choice of test method, such as the differential pressure method, significantly impacts results. Standards like ASTM D 1434 and ISO 2556 guide the required vacuum levels for testing.

Key Instrument Parameters
Accurate testing of high barrier films requires precise instrument parameters, including a high-precision vacuum gauge and effective temperature control. The resolution of the vacuum gauge is critical, as a wider range may reduce resolution and extend testing times. Temperature control is also essential to minimize the impact of ambient temperature fluctuations.

Labthink C130H Gas Permeability Tester
The Labthink C130H tester uses the differential pressure method to measure various coefficients of plastic films, composite films, high barrier materials, sheets, and metal foils. It features excellent temperature and pressure control, enabling tests of ultra-high barrier properties at different temperatures. Due to the low gas permeability of high barrier films, longer testing durations are necessary to gather sufficient data.

Recommendations for Testing High Barrier Films
Testing requires careful attention to conditions, equipment specifications, and procedures. Instruments with high-precision vacuum gauges and effective temperature control are essential. Extended test durations are necessary due to minimal pressure changes during testing.

Conclusion
As the demand for functional packaging materials increases, testing methods are evolving to provide comprehensive evaluations. Labthink encourages collaboration with packaging industry companies for quality control. For more information, visit www.labthink.com.

Catalog excerpts

Permeability Testing of High Barrier Films-1

Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 Permeability Testing of High Barrier Films Permeability of films is classified based on their gas transmission rate at a specific thickness. High barrier films exhibit the lowest transmission rate, followed by barrier films and low barrier films. Due to their superior gas barrier properties, high barrier films are increasingly important in the packaging industry. Since most packaging materials undergo reprocessing steps like coextrusion or lamination, it's essential to test the permeability of the final product to ensure package quality. Reprocessing can alter the physical and chemical properties of the raw materials, affecting their permeability. The chosen test method can significantly impact the results. For instance, in the differential pressure method using a vacuum, the degree of vacuum achieved in the test chamber is critical. Standards like ASTM D 1434 and ISO 2556 specify the required vacuum level. Several instrument parameters are crucial for accurate testing of high barrier films. For example, vacuum gauge and temperature control. The instrument must have a vacuum gauge with a suitable range and high precision as specified by relevant standards. The gauge's resolution, which defines the smallest detectable pressure change, is particularly important. A wider range often comes with lower resolution, requiring longer testing times for high barrier films. Temperature fluctuations can significantly affect permeability test results. The test instrument should ideally have a temperature control function or excellent insulation to minimize the impact of ambient temperature variations.

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Permeability Testing of High Barrier Films-2

Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 Labthink C130H Gas Permeability Tester is based on the differential pressure method, and is professionally applicable to the determination of gas transmission rate, solubility coefficient, diffusion coefficient and permeability coefficient of plastic films, composite films, high barrier materials, sheets, and metal foils. Its Excellent temperature and pressure control technique and high precision vacuum sensor enables tests of ultra-high barrier property at different temperatures. Testing high barrier films requires longer durations...

Open the catalog to page 2

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