Packaging Science and Testing
Paperboard - Internal Bond Strength

The internal bond strength of paperboard provides an indication of expected performance, e.g. strength of board in relation to glue bonding at carton side seams, and possible delamination on scoring, or use in high tack coatings.

This test consists of applying double-coated, pressure sensitive tape to both sides of a test sample. The sample is placed between two compression platens and compressed uniformly. A dwell time may be used. And then a uniform tension is applied to determine the bond strength characteristics of the paperboard.

Using a Chatillon^® testing system, internal bond strength may be determined.

Industry standards for determining the internal bond strength for paperboard is:
- TAPPI T-541

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