Brek strכng εn εlongeshכn na di tu mכst imכtant mεkanikal prכpati dεm fכ PET strap (polyester strap). Brek strɛng de sho ɔmɔs lod wan strap kin sikyuɔr, we elongation de sho aw di strap de biev ɔnda lod—if i de mek i kɔntinyu fɔ gɛt tɛnsiɔn ɔ i de strɛch pasmak. Akɔdin to ASTM D3950 spesifikeshɔn dɛn, dɛn fɔ tɛst ɛn chɛk ɔl tu di prɔpati dɛn fɔ mek shɔ se dɛn wok . Dis gayd de ɛksplen wetin dɛn prɔpati ya min, aw dɛn de miks, ɛn aw fɔ yuz dɛn fɔ pik di rayt PET strap fɔ yu aplikeshɔn.