Umbuzo wokuba ngaba i-PET strap (i-polyester strap) inokutshintsha i-strapping strapping yenye yemibuzo eqhelekileyo evela kubathengi bamashishini. Ngamandla okuqina ukuya kuthi ga kwi-600 N/mm², ukubophelwa kwe-PET kunokuhlangabezana neemfuno ezininzi zesicelo esinzima ngelixa ibonelela ngezibonelelo ezibalulekileyo kubunzima, ukhuseleko, kunye neendleko. Nangona kunjalo, izigqibo zokutshintshwa zixhomekeke kwiimfuno ezithile zomthwalo kunye neemeko zesicelo. Esi sikhokelo sithelekisa i-PET kunye nentsimbi yokubopha kuyo yonke imilinganiselo yokusebenza engundoqo ukunceda abathengi benze izigqibo ezinolwazi.