Zipangizo zodziwika bwino zotumizira unyolo

Polyoxymethylene (POM), yomwe imadziwikanso kuti acetal polyacetal, ndi polyformaldehyde, ndi thermoplastic yopangidwa mwaukadaulo yomwe imagwiritsidwa ntchito m'zigawo zolondola zomwe zimafuna kuuma kwambiri, kukangana kochepa komanso kukhazikika kwabwino kwambiri. Monga momwe zilili ndi ma polima ena ambiri opangidwa, imapangidwa ndi makampani osiyanasiyana a mankhwala omwe ali ndi mitundu yosiyanasiyana pang'ono ndipo imagulitsidwa mosiyanasiyana ndi mayina monga Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, Tenac ndi Hostaform. POM imadziwika ndi mphamvu zake zapamwamba, kuuma kwake komanso kulimba kwake kufika pa -40 °C. POM ndi yoyera yosawoneka bwino chifukwa cha kapangidwe kake ka kristalo koma imatha kupangidwa mumitundu yosiyanasiyana. POM ili ndi kuchuluka kwa 1.410–1.420 g/cm3.

Polypropylene (PP), yomwe imadziwikanso kuti polypropene, ndi polima ya thermoplastic yomwe imagwiritsidwa ntchito m'njira zosiyanasiyana. Imapangidwa kudzera mu polymerization ya unyolo kuchokera ku monomer propylene. Polypropylene ndi ya gulu la polyolefins ndipo ndi yopyapyala pang'ono komanso yopanda polar. Kapangidwe kake ndi kofanana ndi polyethylene, koma ndi yolimba pang'ono komanso yolimba kwambiri. Ndi chinthu choyera, cholimba kwambiri ndipo chimakhala ndi kukana kwambiri mankhwala.

Nayiloni 6(PA6) kapena polycaprolactam ndi polima, makamaka semicrystalline polyamide. Mosiyana ndi nayiloni zina zambiri, nayiloni 6 si polima yolumikizana, koma m'malo mwake imapangidwa ndi polymerization yotsegulira mphete; izi zimapangitsa kuti ikhale chitsanzo chapadera poyerekeza ma polima olumikizana ndi owonjezera.