1 23 Experimental Mechanics An International Journal ISSN 0014-4851 Exp Mech DOI 10.1007/s11340-017-0322-y Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low- Density Polyethylene M. Kroon, E. Andreasson, E. Persson Jutemar, V. Petersson, L. Persson, M. Dorn & P.A.T. Olsson