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International Standards

ISO 5636-5

Introducing ISO 5636-5 - Industrial Physics

ISO 5636-5 is an international ISO standard used to determine the air permeance (medium range) of paper and board using the Gurley air permeance testing method.  

The Gurley method involves testing the air permeance of paper and board using an air resistance tester. It’s applicable to papers and boards which have air permeances between 0,1 µm/(Pa⋅s) and 100 µm/(Pa⋅s). 

The ISO 5636-5 test is unsuitable for rough-surfaced materials, which cannot be securely clamped to avoid leakage.  

How do you carry out a Gurley air permanence test?

Using a suitable air resistance tester the Gurley air permeance test will typically give you accurate results in less than an hour. So what does it look like in practice? A test piece of paperboard or corrugated board is placed in the Gurley permanence test apparatus, which is filled with air. This is compressed by the weight of a vertical cylinder floating in liquid.

Next, the compressed air is forced through the sample - as it passes through, the cylinder falls. By timing how long it takes for a set amount of air to pass through the sample, you get the formula for how porous the material. 

ISO 5636-5 testing devices

So, how can Industrial Physics improve your ISO 5636-5 Gurley air permeance testing? 

Technidyne PROFILE/Plus® Bendtsen Roughness with Porosity 

The PROFILE/Plus® Bendtsen Roughness with Porosity is a highly-accurate, fully-automated paper roughness and porosity measurement device. Ideal for ISO 5636-5 testing.  

Technidyne PROFILE/Plus® Porosity 

The PROFILE/Plus® Porosity tester gives you automated paper roughness and porosity measurements to international standards. 

Technidyne PROFILE/Plus® Roughness Sheffield with Porosity 

The Profile/Plus Roughness Sheffield with Porosity accurately and automatically measures surface roughness of paper and air permeance to industry standard methods.   

Your global test and inspection partner for ISO 5636-5 

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