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This paper presents an experimental characterization of mechanical properties of  a polyethylene terephtalate (PET) resin classically used in stretch blow  moulding process. We have applied on such a material a well established  experimental protocol at CEMEF, including new and relevant biaxial tensile  tests. The experimental set-up relative to biaxial tension will be presented and  described in a first part of the paper. Furthermore, we will focus on the  experimental DMTA preliminary tests which are required to estimate the resin  sensibility to temperature and strain rate in linear viscoelasticity domain.  Finally, we will be interested in the material large strain behaviour: biaxial  tensile results are presented and discussed. Finally, such an experimental  approach should allow a relevant modelling of polymer physics and mechanics;  this point will not be discussed here because of a lack of time

Biaxial tension on polymer in thermoforming range