Ngā rauemi pereti mekameka kawe noa

Ko te Polyoxymethylene (POM), e mōhiotia ana ko te acetal polyacetal, me te polyformaldehyde, he kirihou wera hangarau e whakamahia ana i roto i ngā wāhanga tino tika e hiahia ana kia tino pakari, kia iti te waku me te pumau o te taha. Pērā i te maha atu o ngā polymer hangai, ka hangaia e ngā kamupene matū rerekē me ngā momo rerekē, ā, ka hokona i ngā momo ingoa pērā i a Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, Tenac me Hostaform. Ko te POM e tohuhia ana e tōna kaha teitei, te pakeke me te pakari ki te −40 °C. He mā te āhua o te POM nā te mea he nui te hanganga tioata engari ka taea te whakaputa i roto i ngā tae rerekē. Ko te mātotoru o te POM he 1.410–1.420 g/cm3.

Ko te Polypropylene (PP), e mōhiotia ana ko te polypropene, he pūmua kirihou wera e whakamahia ana i roto i ngā momo tono maha. Ka hangaia mā te whakapūmuatanga mekameka-tipu mai i te monomer propylene. Nō te rōpū polyolefins te Polypropylene, ā, he āhua tioata, kāore hoki i te pōraruraru. He rite ōna āhuatanga ki te polyethylene, engari he paku mārō ake, he ātete wera ake. He rauemi mā, he pakari ā-mīhini, ā, he ātete matū teitei.

He pūmua te nairona 6(PA6) te polycaprolactam rānei, inā koa te polyamide haurua-kiriata. Kāore te nairona 6 i te pūmua whakapūpū, engari he mea hanga mā te whakapūpū whakatuwhera-mowhiti; nā tēnei he take motuhake i roto i te whakataurite i waenga i ngā pūmua whakapūpū me ngā pūmua tāpiri.