Packaging testing – tensile strength

How we test the strength of seals and of packaging materials – both important in product protection and safety assurance. The test is used by food manufacturers to troubleshoot seal failure problems and to investigate seal integrity versus opening strength.

Contact us

Before you Send please insert the same letters and numbers you see in this image captcha_image into this box: (this helps us fight spam)

When you click on the Send button you will be deemed to have accepted our terms and conditions

You may also be interested in


A tensile test provides information about a material strength including elongation, yield point and tensile strength. The material sample is cut using a template and the size is dependent on the standard being used. This test shows the strength of a seal. The sample is placed between two jaws and the upper jaw moves away from the lower jaw pulling the seal apart. The graph generated is related to the seal profile and different seal profiles will produce a different graph. The data collected and plotted on the graph is related to the force required to pull the seal apart. The test ends when the seal has been broken. This test can also be used for measuring the tensile strength of other materials, in this instance paper, and the force required to rupture a strip of paper. Again, the upper jaw moves away from the lower jaw and the force required to rupture the paper is recorded. Not all materials will rupture under this force but the equipment can be set up for greater forces in order to measure the force required to rupture thicker pieces of materials. This test would be used by packaging users, for example food manufacturers, for investigations into seal failures and to investigate seal integrity versus opening strength.

More on Packaging

Pizza in takeaway box

Bans of perfluoroalkyl substances (PFAS) in food packaging gain traction: Get ready with PFAS testing

Governments around the world are currently trying to remove PFAS from the food supply, as well as the environment. A patchwork of new legislations in recent ...

Plastic packaging

5 food packaging trends during 2021

In 2021, the Packaging Industry was not only plagued by the pandemic but faced additional pressures. In this round-up, we will consider some of the big issue...


Flexible mono-materials packaging challenges

Traditional mono-material packaging requires refinement to ensure that they perform at the same level as multi-material counterparts. ...

That’s a wrap - reducing food waste through sustainable and smart packaging

That’s a wrap - reducing food waste through sustainable and smart packaging

While packaging waste is a critical issue, it must be considered alongside the issue of food waste. Fortunately, projects in food packaging, such as the Glop...

Fruit and vegetable packaging

Considerations for optimal food barrier packaging

With a growing variety of new and established materials, each with specific characteristics, increases the potential for selecting unsuitable packaging mater...

Paper straws in drinks

Problem solving: Paper straws in drinks

There have been some concerns about the quality of plastic straw replacements – particularly when it comes to paper straws. The key issues pointed out by con...

Contact an expert