Method and device for evaluating the permeability of a sample
AssigneeStora Enso OYJ
InventorsRobertas Maldzius, Jonas Sidaravicius, Tadeus Lozovski, Kaj Backfolk, Isto Heiskanen
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Abstract
The present invention relates to an arrangement for determining the permeability of a sample, said arrangement comprising a source of fluid medium arranged such that at least a fraction of said medium can be brought into contact with a first surface of said sample to be tested; means for measuring the electrical properties at a second surface of said sample, wherein the second surface is opposite said first surface of said sample; and a controller for recording said electrical properties, and for determining the transmission rate of the fluid medium through the sample based on the recorded electrical properties.
Claims11
An arrangement for determining a permeability of a sample, said arrangement comprising:
- a source of fluid medium arranged such that at least a fraction of the fluid medium is configured to contact a first surface of a sample to be tested;
- means for measuring an electrical property of the sample at a second surface of the sample, wherein the second surface is opposite said first surface of the sample;
- and
- a controller for recording said electrical property, and for determining a transmission rate of the fluid medium through the sample based on recorded changes of the electrical property over time.
A method for determining a permeability of a sample, said method comprising the steps of:
- arranging a sample such that at least a fraction of a fluid medium contacts a first surface of the sample;
- continuously measuring and recording an electrical property at a second surface of the sample over a period of time, wherein the second surface is opposite said first surface of the sample, and wherein said period of time starts when said fraction of vapor contacts the sample;
- and
- determining a transmission rate of the fluid medium through the sample based on a recorded surface electrical property changes in time.
Dependencies are inferred from the claim text.