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Gehrig's method: Determine the time taken to pass 100ml of gas at a constant differential pressure of 1.23kPa.
Schopper method: Constant differential pressure of 1.00 kPa ± 0.01 kPa or 2.50 ± 0.01 kPa, choose a suitable test duration and determine the gas flow through the specimen by the test volume.
Bengtsson method: The air flow through the test surface is recorded after 5s of clamping at a constant differential pressure of 1.47kPa.
Conform to the standard
SJ_T 10171-2016 General test method for basic performance of alkaline battery separators (permeability part)
GB/T 458-2008 Determination of air permeability of paper and cardboard
GB/T 36363-2018 Polyolefin diaphragm for lithium-ion batteries
Specifications
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Specifications |
Gurley Method |
Schopper Method |
Bendtsen method |
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Testing Range |
0.01-2.5um/(Pa.s) |
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Transmission Rate |
c0.01-120ml/min（Other ranges are optional） |
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Resolution Ratio |
0.001um/(Pa.s) |
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Differential Pressure |
Range：0-3KPa，Accuracy：±0.01kPa（Other ranges are optional） |
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Effective pressure difference |
1.23kpa±0.01kPa |
1.00 kPa±0.01kPa or 2.50±0.01kPa（Gas flow less than于0.13ml/L） |
1.47kPa±0.02kPa |
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Testing Duration |
10-6000.0s |
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Sample Size |
50mm×50mm |
60mm×100mm |
50mm×50mm |
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Sample Temperature and Humidity Treatment |
A. Preprocess：Let stand for 24h under the condition of <40℃, 10-35%RH B.The difference between weighing before and after 1h is not more than 0.25% of the total mass, and the sample is balanced |
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Instrument Dimensions |
L×W×H: 500mm×400mm×300mm |
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Power |
100w |
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Power Source |
220V,50Hz |
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