Strong bond with polypropylene

Vehicles are becoming lighter all the time through the application of plastics. Some of these materials, such as polypropylene have extremely high strength values. At SABA, we therefore increasingly receive queries from the market about bonding and sealing this material. Polypropylene naturally has fairly low surface tension and is therefore difficult to bond and seal.

Polypropylene is used to make sandwich panels such as Monopan®. These sandwich panels are light, but also very strong, due to the internal honeycomb structure. They are therefore frequently used in the automotive industry, for example for the assembly of delivery and courier vans. Attachment rails are often used to fasten loads in vehicles of this type, in combination with tie-down straps. With this common application, it is crucial that the bonding between the sandwich panel and the aluminium attachment rail is stronger than the maximum force that the attachment rail itself can absorb.

SABA commissioned an independent test of the strength of the bonding of an aluminium attachment rail glued to a Monopan® sandwich panel with Sabatack®. This shows that the aluminium attachment rail is pulled apart while the Sabatack® adhesive bond between the sandwich panel and the attachment rail remains intact. In short: a strong bond!

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In order to realise the best possible, lasting bond with polypropylene, the correct working method and application of our adhesives and sealants is essential. We have developed a complete, integrated system for this, consisting of a cleaner and primer, always in combination with one of the superior Sabatack® products.

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