Plastic-metal assemblies enjoy an enduring bond with ISO standards

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Por Sandrine Tranchard
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For the automotive and aerospace industries, saving weight is a top priority to reduce CO2 emissions and improve fuel efficiency for environmental protection. Now, thanks to hybrid mixed materials such as plastic-metal assemblies, these industries can rise to the challenge. But how safe are these products? Are the materials efficient enough to guarantee people's safety?

Tackling the problem head on, ISO has just published ISO 19095, a new series of standards that gives guidelines for evaluating the adhesion interface performance of plastic-metal assemblies. This is a big step as there were no international test standards on the subject and existing methods only apply to the measurement of adhesive properties between adherends of the same kind. Yet the performance of these new materials needs to be tested and assessed in an appropriate environment.

So what does the series cover? Dr. Ritsuo Iwata, Project Leader of ISO 19095, Plastics – Evaluation of the adhesion interface performance in plastic-metal assemblies, gives us an insight: “The new International Standard will provide the experimental data supporting the applicability of the test methods proposed to the evaluation of adhesion interface performance of metal-plastic assemblies.”

The methods set out in ISO 19095 are intended to ensure that the integrity of the joint is realized through the interface and that traceability of the value improves data comparison. The adhesion interface performance is tested on tensile strength, tensile shear strength, peel strength, bending strength, impact strength and sealing properties. The new suite of standards will now allow quantitative and objective evaluation as well.

“With the progress of bonding technologies, we expect to see an improvement in the strength of the whole-body structure by using high-strength plastic-metal assembly technique as well as high-strength structural adhesive technology and, as a result, lighter, thinner and higher-value-added products will be created for a wide range of applications,” enthuses Dr. Ritsuo Iwata.

ISO 19095 will help manufacturers determine the correct values, enhance the traceability of these values and improve the comparability of data between different kinds of materials. It will lead to the rapid spread of products and assembly parts made of plastics and metals into international industries, such as the automotive sector, electronics, aircraft and spacecraft, to name a few.

The ISO 19095 series of standards was developed by technical committee ISO/TC 61/SC 11 on plastic products, whose secretariat is held by JISC, ISO member for Japan. The standards can be bought from your national ISO member or through the ISO Store.

Sandrine Tranchard
Sandrine Tranchard

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