Ihe e ji ebufe ihe nkịtị mee efere efere

Polyoxymethylene (POM), nke a makwaara dị ka acetal polyacetal, na polyformaldehyde, ọ bụ thermoplastic nke injinịa eji eme ihe n'akụkụ nkenke nke chọrọ nnukwu ike, obere esemokwu na nkwụsi ike nha dị mma. Dịka ọ dị na ọtụtụ polymers ndị ọzọ e ji aka rụọ, ụlọ ọrụ kemịkalụ dị iche iche na-emepụta ya site na usoro dị iche iche ma na-ere ya n'ọtụtụ aha dịka Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, Tenac na Hostaform. A na-eji ike dị elu, ike na nkwụsi ike ya mara POM ruo −40 °C. POM bụ ọcha na-adịghị ahụkebe n'ihi nnukwu ihe mejupụtara kristal ya mana enwere ike imepụta ya n'ọtụtụ agba. POM nwere njupụta nke 1.410–1.420 g/cm3.

Polypropylene (PP), nke a makwaara dị ka polypropene, Ọ bụ polima thermoplastic nke a na-eji eme ọtụtụ ihe. A na-emepụta ya site na polymerization nke usoro nhazi nke si na monomer propylene. Polypropylene so n'ìgwè polyolefins ma ọ bụ akụkụ kristal na-adịghị mma. Njirimara ya yiri topolyethylene, mana ọ siri ike ntakịrị ma na-eguzogide okpomọkụ karịa. Ọ bụ ihe ọcha, nke siri ike n'ụzọ mekaniki ma nwee nnukwu iguzogide kemịkalụ.

Naịlọn 6(PA6) ma ọ bụ polycaprolactam bụ polima, ọkachasị semicrystalline polyamide. N'adịghị ka ọtụtụ naịlọn ndị ọzọ, naịlọn 6 abụghị polima condensation, kama ọ na-etolite site na polymerization nke na-emepe mgbanaka; nke a na-eme ka ọ bụrụ ihe pụrụ iche na ntụnyere dị n'etiti polima condensation na mgbakwunye.