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RIM and RTM: key techniques in FRP production

The world of fibre-reinforced plastics (FRP) is rich in processes and techniques, all aimed at creating lightweight, durable and high-performance components. At aXpel composites, we work with a variety of these techniques, including two particularly noteworthy ones: Reaction Injection Molding (RIM) and Resin Transfer Molding (RTM). Today we would like to give you a deeper insight into these methods and their advantages.


RIM is a low-pressure process mainly used to produce polyurethane components. The two main components of the polyurethane, the polyol and the isocyanate, are injected into the closed mould where they react with each other and cure. RIM offers an excellent opportunity to produce large, complex shaped parts with high dimensional accuracy and good surface quality. In addition, RIM allows the production of parts with different wall thicknesses, which can be advantageous for certain applications.


RTM, on the other hand, is a process that is ideal for producing FRP parts with high mechanical properties and good surface quality. In RTM, the dry fibre reinforcement is placed in the mould and the resin is introduced under pressure until it has filled the entire mould and saturated the fibres. After curing, you get a strong, lightweight and precisely moulded part.


Both processes have their merits and applications, and at aXpel composites we use both depending on the requirements of the specific project. RIM allows us to produce large, complex parts quickly and efficiently, while RTM gives us the ability to produce high-strength, lightweight FRP parts that can be used in a variety of demanding applications.


Mastering and applying RIM and RTM are just two examples of how aXpel composites strives to push the boundaries of FRP technology to always provide our customers with the best solution for their needs.


RIM / RTM

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