In the study reported here two experimental techniques have been employed to assess the extensional behaviour of LGF reinforced thermoplastics: the Squeeze Load Test (SLT) and the Bubble Inflation Test (BIT). Both tests are analogues of extensional flows in important full-scale processes: compression moulding (SLT), blow moulding (BIT) and thermoforming (BIT) in particular. For comparison shear flow results obtained from rotational viscometry are also reported, since such flows are invariably present at some point in all processes.