PP strap (polypropylene strap) kpɔa ŋusẽ to ewɔwɔ ƒe mɔnu aɖe si woyɔna be molecule orientation me. Le ewɔwɔ me la, wokekea ka si woɖe do goe la le nɔnɔme siwo dzi wokpɔna me, si wɔnɛ be kɔsɔkɔsɔ siwo nye polymer la sɔna ɖe ka la ƒe didime nu.
PP strapping (polypropylene strapping) li le kekeme si woɖo ɖi me tso 5mm va ɖo 19mm, eye 9mm, 12mm, 15mm, kple 19mm nye lolome siwo wodzrana ɖo wu. Kekeme tiatia ye afia agba ƒe mama, gbagbã ƒe ŋusẽ, kple dɔwɔnuwo ƒe ɖekawɔwɔ. Ka siwo le gbadzaa wu (5–9mm) sɔ na kakɛ siwo me kɔ kple e-asitsatsa ƒe nubablɛwo, gake tiatia siwo keke wu (15–19mm) ya kpɔa pallet kpekpewo kple dɔwɔƒewo ƒe agbawo gbɔ. Mɔfiame sia ɖe kekeme siwo sɔ na PP strapping rolls, alesi kekeme kpɔa ŋusẽ ɖe dɔwɔwɔ dzii, kple alesi nàtia nɔnɔme nyuitɔ na wò dɔdamɔnua me.
PP strap (polypropylene strap) li le titrime siwo tso 0.35mm va ɖo 0.80mm me, eye woƒe didime ɖesiaɖe sɔ ɖe agba tɔxɛ siwo hiã kple dɔwɔnu ƒomeviwo nu. Ka siwo le tsɛ wu (0.35–0.45mm) subɔa kakɛ siwo me kɔ kple e-asitsatsa ƒe nubablɛwo, gake tiatia siwo le kpekpem wu (0.65–0.80mm) ya kpɔa pallet kpekpewo kple dɔwɔƒewo ƒe agbawo gbɔ. Titrime kpɔa ŋusẽ ɖe gbagbã ƒe ŋusẽ, nutrenu ƒe dɔwɔwɔ, kple mɔ̃a ƒe nuɖuɖu ƒe kakaɖedzi dzi tẽ. Mɔfiame sia ɖe titrime ƒe tiatia siwo sɔ na PP strap, alesi titrime do ƒome kple break force, kple alesi nàtia nɔnɔme nyuitɔ na wò dɔwɔwɔ me.
Tiatiawɔwɔ le PP strapping grades dome kpɔa �ŋusẽ ɖe ɣeyiɣi didi ƒe dɔwɔwɔ dzi wu alesi nuƒlela akpa gãtɔ nyae. Polypropylene ƒe ka si me ʋuʋudedi le ŋutɔ—si wowɔ tso aŋɔ si ƒe ʋeʋẽme le eme le 0.60 kple 0.95 dl/g dome—na moleculenɛ be woƒe tensile ŋusẽ si lolo wu, woƒe ʋuʋu ƒe tsitretsitsi nyuie wu, kple dɔwɔwɔ ƒe nuléle ɖe te nyuie wu le ɣeyiɣi aɖe megbe. Standard-grade PP strapping ate ŋu awɔ dɔ nyuie na ɣeyiɣi kpui alo dɔ bɔbɔe ƒe dɔwɔwɔ gake ate ŋu abu tete kabakaba le agba si nɔa anyi ɖaa te. Nyati sia tsɔ dzesi eveawo siaa sɔ kple wo nɔewo le molecule ƒe wɔwɔme, mɔ̃ɖaŋununya ƒe nɔnɔme, kple dɔwɔwɔ ɣeyiɣi didi me be wòakpe ɖe nuƒlelawo ŋu woatia nɔnɔme nyuitɔ.