Abstract
Transverse markings are observed when some of the semi-crystalline polymers are extended close to their breaking point. The origin of these transverse markings have not been elucidated exactly to the date. The local regions with naticiable transverse markings appear in the redrawn polyethylene and polypropylene films. Ripple-like creases may be generated at the contour where two localised regions with different extension ratio's come in contact with each other.
Molecular chains in these two regions do not fit well on this boundary without causing large strain on one of the regions. Transverse markings appear in this strained regions.
