Internal bond test (Z-direction)

Internal bond test (Z-direction)

According to Tappi T541 or ISO 15754 standards, the Z - Tensile Test is performed on multilayer packaging materials such as paper and cardboard. The Z – Tensile Test, also called the Internal Bond Test, determines the bond frequency of layers for samples consisting of layers that adhere to each other.

With the Z – Tensile Test, the machinability of materials can be determined in printing or dyeing processes. Z – Tensile Test is performed by applying a vertical force to the surface of the specimen with another specimen according to Tappi T541 or ISO 15754 standards. There is double-sided tape.

• The other side of the carrier has only double-sided tape.
• First, the sample is pressed onto the second carrier.
• Pressing force and time are adjusted according to the sample.
• Finally, the tensile test is applied to the sample.
• The measured value is the pull-out resistance.

Tappi T541: Internal bond strength of cardboard (tensile in z direction)

ISO 15754: Paper and paperboard — Determination of tensile strength in the Z direction