Testing services / Air permeability of paper or board

Air permeability of paper or board

Air permeability is an important property for some paper grades, such as paper bags that are filled industrially. Measurlabs offers air permeance testing with the Bendtsen and Gurley methods.

The Bendtsen method (ISO 5636-3) is suitable for papers with permeance from 0.35 µm/(Pa*s) to 15 µm/(Pa*s). It is not suitable for rough-surfaced papers that cannot be securely clamped to the device. The results are reported in ml/min, expressing the average volume of air that passes through the material in a minute at elevated pressure.

The Gurley Method (ISO 5636-5) is suitable for papers with permeance between 0.1 µm/(Pa*s) and 100 µm/(Pa*s). The test may also be used to determine the air resistance of paper and board. In the Gurley test, the time it takes for a certain volume of air to pass through the paper at a certain pressure is measured in seconds.

Suitable sample matrices: Paper and board
Required sample quantity: Five A4 sheets
Typical turnaround time: 3 weeks after receiving the samples
Available quality systems: Accredited testing laboratory
Device types: Standard specific equipment
Method expert: Ville Roininen

Paper and board

Mechanical testing

Price

Typical price (Excl. VAT):

104 €

We also charge a 97 € service fee per order.

Large batches of samples are eligible for discounts.

Questions? We're happy to help.

info@measurlabs.com

Questions? We're happy to help.

info@measurlabs.com

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Other tests we offer

Folding endurance of paper and board

This test is used to determine the folding endurance of paper or board using the Köhler-Molin, Lhomargy, MIT, and Schopper testers. During the test, a narrow strip of paper is folded forwards and backward in a standardized manner, so that it is subjected to longitudinal stress until it breaks.

Bending stiffness of corrugated cardboard

Bending stiffness testing is performed to evaluate cardboard's stiffness by measuring the resistance to bending with 4-point loading. The results express the bending stiffness of the material in the machine direction and the cross direction.

Horizontal impact test for corrugated cardboard

Horizontal impact testing by the ISO 2244 standard is used to determine the effect of a vertical impact on the horizontal edge of finished and filled cardboard containers. In the test, the packaging is placed on a carriage that is rolled against an impact apparatus. Testing can include a single test or a series of impact tests to evaluate the packaging's ability to perform in environments with a horizontal impact hazard.

Ring crush test (RCT) of liners

This test is used to evaluate the compressive strength of paper and board with the ring crush method. Testing is particularly useful when determining the usability of shipping containers made from fiberboard.

Scott bond internal strength of paper or board

The Scott bond test measures the energy required to rapidly delaminate a sheet-type specimen. A z-directional rupture is initiated by the impact of a pendulum having both a controlled mass and a controlled velocity. The geometry of the apparatus causes the tensile stress to be rotational with negligible shear stress on the specimen. The energy is absorbed during the elongation and stretching of the sample's fiber network before rupture. The test is a measurement of strain energy per unit sample area, which is proportional to the area under the stress-strain curve.

Puncture resistance of corrugated cardboard

In this test, a pyramid-shaped puncture head is used to measure the puncture resistance of a board sample. During this process, combined tensile, compression, flexural, and shear forces occur. The result is given as the energy absorbed by the sample upon being punctured. If you need a puncture resistance test for another material, please contact us to request an offer.

Concora medium test (CMT30) for flutings

This method is used to determine the flat crush resistance of a corrugating medium after being fluted to A-flute geometry with a laboratory fluting device. The Concora corrugating medium test can be used for any corrugating medium that is intended to be used on a corrugated board.

Short-span compression test (SCT) for paper or board

SCT (short-span compression test) is one of the most commonly used testing methods for determining the compression strength of paper or cardboard. In this test, the sample is conditioned in standard conditions (23 °C/50% RH), after which the compression strength is measured in the machine direction (MD) and the cross direction (CD).

Tensile strength (TEA) of paper and paperboard

This test is used to measure the tensile strength and elongation of paper or board in the machine direction (MD) and the cross direction (CD). Even small variations in tensile strength can affect the functionality of the product. Paper and board must withstand certain forces during manufacturing, transportation, shipping, and use.

Pin adhesion test (PAT) of corrugated cardboard

PN 87/P-50143/07

The pin adhesion test measures the bond strength between the corrugated medium and the liner. It is used to analyze the strength of adhesives. Upon request, the measurement can be performed on double-walled and triple-walled corrugated cardboard.

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