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Bonding carbon fibre automotive bonnet (hood)

Carbon fiber bonding is growing as engineers find more uses for it. Carbon fibre (or carbon fiber if you’re in the US) composite is made up of interwoven carbon filaments combined with a resin. It has an extremely high strength-to-weight ratio combined with good heat and chemical resistance. It is a popular material in aerospace, motorsport, defense/military, and sports equipment manufacture.

Carbon fibre car parts are highly desirable due to their lightweight and high-performance structure.  Improved vehicle performance and fuel economy can be achieved by incorporating lightweight components in the assembly and replacing heavier and less economical metal parts. The material also looks good – there is even a huge market for pretend carbon fibre vehicle wraps to make it look like your car has carbon fibre parts (although it should be noted vinyl wrapped vehicle performance is not improved!).

In this video, you can watch Permabond ET500 and Permabond PT326 being used to bond pre-formed bonnet shell components together and big head fasteners inside the bonnet.

ET500 is a fast-curing two-part epoxy that cures at room temperature. ET500 is a twopart fastsetting epoxy adhesive that bonds to a wide variety of substrates such as wood, metal, ceramics, carbon fiber and some plastics. It cures rapidly at room temperature to provide handling strength in approximately 5 minutes.

PT326 is a high-performance polyurethane adhesive that is colour matched to the carbon fibre to give a perfect aesthetic finish, as well as high strength and impact resistance. This composite bonding adhesive offers flexibility and peel strength and will not crack off.

These products come in dual cartridges with static mix nozzles to ensure accurate mixing and easy application. These are just two examples of carbon fiber bonding adhesives. For an adhesive recommendation for your carbon fiber bonding application, please contact Permabond for assistance.