Profile: Patterson & Rothwell Ltd. is a supplier of plastic injection moulded products. We are an ISO 9001 certified company. Our products include ABS, nylon, polycarbonate, polypropylene and hi impact polystyrene. We also offer services like moldflow polymer prediction, plastic mould toolmaking and plastic moulding services. In our polymer prediction moldflow to simulate the complexity of injection moulded polymer melts. This eliminates potential moulding problems prior to the production of the mould. Flow simulations can also optimize runner systems, predict weld lines, identify air traps, determine sheer stress, determine fill time, predict confidence of fill and clamping force requirements,