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International Standards

ISO 16260

ISO 16260

Internal bond strength testing
ISO 16260 is an industry-wide accepted testing method for determining the energy required to rapidly delaminate a test piece of paper or board. It tests the internal bond strength of the specimen, returning essential QA information for manufactures and suppliers on its performance under impact.

The ISO 16260 method
As a testing technique that is suitable for both single and multi-ply papers and boards, including coated sheets and ones that have been laminated with synthetic polymer films, it is a flexible test able to return results for a wide range of samples. That said, it’s particularly useful suitable for papers and boards that may be subjected to rapid impacts, impulses, or shock loads in the z-direction during printing or conversion, with ‘z’ signifying the thickness direction being tested.

Our ISO 16260 compliant products
Be confident that your testing solutions will help you adhere to industry standards, with our selection of bond testers.

Understanding the ISO 16260 technique
The ISO 16260 method measures the energy required to rapidly delaminate a test piece of paper or board by subjecting the test piece to impact a pendulum of a defined mass, moving at a defined velocity. The sample is held static in-between two double-coated tape substrates. The speed at which this pendulum is able to delaminate the paper or board returns information about the ‘z’ thickness direction of the sample.

The weight of the pendulum can be changed to suit the sample. Some testing machines also cut down on user effort, with automatic cut and press functions, or the ability to test more than one sample at a time.

To determine the internal bond strength of a sheet, it is also possible to use the Tappi T 569 method. Many testing machines are compliant with both standards. Find out more about the Tappi T 569 technique.

What materials aren’t suitable for ISO 16260 testing?
This testing method requires the sample to be adhered to double-sided adhesive tape under pressure, so delicate or porous samples – such as tissue – may not be able to withstand the testing process.

ISO 16260 testing help and solutions
Whether you’re at the R&D stage for a new product or looking to add a single new element to your existing test and inspect set up, we are happy to help with advice and recommendations. For more information on ISO16260 testing and how it might fit into your set up, get in touch.