This is a sandwich construction in which one, two or more E or ECR glass reinforcement materials (e.g. chopped strand mats, roving fabrics, multiaxial fabrics, non-woven fabrics) are bound with a PP non-woven fabric or PP interlaced yarns.
This means the number of combinations is virtually unlimited. Moreover, this is a ideal for press and injection procedures (RIM, RTM) thanks to its excellent resin uptake.