Biaxial stretching of polymers using a novel and versatile stretching system
(1347–1353) Polymer  Engineering &  Science 51 #7 (2011)
Qaiss and Bousmina, Canada and Morocco developed a versatile biaxial stretching module that can be adapted to any uniaxial traction testing machine to generate consecutive or simultaneous two-directional biaxial stretching at various stretching ratios and draw rates.  The module allows direct conversion of the uniaxial machine displacement to transverse displacement with a precise adjustment of the stretch ratio between the transverse of the longitudinal strains.  Additionally, the developed device allows simultaneous measurements of films mechanical properties in the two directions. (RDC 6/24/2011)