Amandla okuqhawula kunye nobude zizinto ezimbini ezibalulekileyo zemishini ye-PET strap (i-polyester strap). Amandla okuqhawula anquma ukuba ungakanani umthwalo onokuthi ukhuseleke, ngelixa i-elongation inquma indlela i-strap eziphatha ngayo phantsi komthwalo-ingaba igcina uxinzelelo okanye ilula kakhulu. Ngokweenkcazo ze-ASTM D3950, zombini iipropati kufuneka zivavanywe kwaye ziqinisekiswe ukuqinisekisa ukusebenza. Esi sikhokelo sichaza ukuba ezi zakhiwo zithetha ntoni, zisebenzisana njani, kunye nendlela yokuzisebenzisa ekukhetheni umtya wePET ofanelekileyo kwisicelo sakho.