Closed-cell Rigidity Foaming Material, Sandwich Material, Foam Cores, PMI Foam

Rifeng® F is a closed-cell rigid foam base on Polymethacrylimide (PMI) polymer, that is completely free of CFC’s. It's with fine Cell Size. Based on the Rifeng® W, keeping the premise of excellent mechanics property, Rifeng® F particularly fined cell size, to ensure the minimum possible uptake of resin, which allows the end weight of the component to remain extremely low. And problem-free compatibility with metallic facing materials due to the absence of corrosive effects. The thermal and thermomechanical properties of the rigid foam are otherwise similar to Rifeng® W. The extremely fine-celled material is used for infusion components in aeronautic and aerospace applications, as well as in sports equipment and in automotive construction. Moreover, with its extremely low dielectric constants and particularly favorable transmission properties in the high frequency region. Rifeng® F is also used in  antenna, radomes, and X-Ray / CT table tops. Processing and Production Rifeng® F foam is suitable for most common curing processes,such as hand lay-up, prepreg processing RTM and vacuum infusion at temperatures up to 130 °C ~ 150°C, and maximum pressure up to 0.5MPa. Weight Saving When building composite sandwich components, lightweight Rifeng® F has a closed cell structure that ensures the resin stays exactly where you want it – in the interface. This eliminates excess and unnecessary resin that adds undesirable weight to the finished part. Thermoforming and Shaping Rifeng® F can be easily thermoformed or CNC machined to meet customer requirements. High precision, pre-shaped and ready-to-use foam cores in simple or complex geometries can also be supplied by us. Basic Property Property Unit Rifeng® 40F Rifeng® 75F Rifeng® 110F Density Kg/m3 45±5 75±7 95±10 Compressive Strength MPa 0.45 1.95 3.0 Compressive Modulus MPa 23 80 137 Tensile Strength MPa 1.1 2.5 2.9 Tensile Modulus MPa 50 105 130 Shear Strength MPa 0.4 1.1 1.5 Shear Modulus MPa 15 38 45 130℃ Compressive Strength MPa / 1.4 2.0 130℃ Compressive Modulus MPa / 60 75 Dielectric Constant / 1.08  ① 1.12  ① Dielectric Loss Tangent  / 0.0018  ① 0.0026  ① Heat Distortion ℃ 180 180 180 ① Test Frequency:4.3GHz * Technical data values presented are typical for nominal density, subject to normal manufacturing variations.  * Density values are valid for full-size sheets with a minimum thickness of 10 mm(0.39 inch) only. Other density ranges are available upon request.  Sales range for Rifeng® F Rifeng® Size (mm) Standard Sheet Thickness (mm) 40F 2500 x 1250 1 ~ 85 75F 2200 x 1100 1 ~ 75 110F 2000 x 1000 1 ~ 70 * All dimension ranges presented in these tables are standard. To discuss any size or thickness not listed, please contact a Rifeng® representative. * Length width tolerance ± 10 mm, thickness tolerance ± 0.5mm.