With FIPFG, polymeric reaction materials are metered, mixed and then applied using a dynamic mixing system such as dynamicLine from DOPAG. This involves an A-component (polyol) and a B-component, the hardener (MDI isocyanate). The A-component has molecule chains of different lengths. This determines how soft or hard the foam is after hardening. The longer the molecule chains, the softer and more flexible the foam. Mixing the A and B-components in the mixing system starts the reaction. The molecule chains connect with one another and a polymer is formed. This produces carbon dioxide as a fission product. With the technology used by DOPAG, the low-pressure process, this is responsible for foaming the material. For example, it can be applied directly into the groove or mould as well as onto flat surfaces with the aid of a linear robot. This produces a soft foam gasket that hardens at room temperature without the use of a tempering oven.
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