Plybond testing measures the energy required to delaminate a multi-ply board structure, providing an indication of the material's internal bond strength. Results are reported in mJ.

Scott internal bond strength testing is also included in Smithers' Paper Proficiency Service.

Standards and accreditation

Smithers performs Scott plybond testing in accordance with TAPPI T 833.

Smithers Liner Cleavage Test

The Scott plybond test can cause delamination towards the centre of a board structure rather than specifically at the weakest ply bond.

To provide a more targeted assessment of liner strength in carton board and corrugated materials, Smithers has developed a liner cleavage test. This can support the evaluation of materials for packaging applications where ply adhesion may affect converting or performance, including machine carton erection.

Talk to our experts about your paper or board material and the internal bond or delamination performance you need to evaluate.

Download a brochure for more information:

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