Polypropylene momo-toru, te copolymer matapōkere rāneipaipa polypropylene, e kiia ana ko te whakarāpopototanga PPR. Ka whakamahia e tēnei rauemi te whakarewa wera, he taputapu whakarewa me te tapahi motuhake, ā, he tino kirihou. He tino whaitake hoki te utu. Ina tāpirihia he paparanga whakamarumaru, ka pai ake te mahi whakamarumaru, ā, ka tino maeneene hoki te pakitara paipa, haunga ngā hononga i waenga i ngā waea o roto me waho.

Ko te tikanga ka whakamahia i roto i ngā paipa kua tanumia i mua i roto i ngā poka hohonu, i ngā pakitara kua whakatōkia rānei.Paipa PPRhe roa te ora mahi tae atu ki te 50 tau, he utu whaitake, he pumau te mahi, he ātete ki te wera me te pupuri i te wera, he ātete ki te waikura, he maeneene, he kore e tauine i te pakitara o roto, he haumaru, he pono hoki i roto i te pūnaha paipa. Hei whakarite i te haumaru o te pūnaha, me whakamahi ngā taputapu matatau me ngā kaimahi whai tohu mō te hanganga, he mea e hiahiatia ana he hangarau teitei.

Ko ngā tae ngawari, ōrite—kaua ki ngā oro rerekē e kitea ana i roto i ētahi atu paipa wai—ka hoatu tePaipa wai PP-Rhe āhuatanga ātaahua me te tae. (He maha ngā wā ka whakaaro ngā kaihoko ko te mā te tae pai rawa atu mō ngā paipa PP-R, engari ehara te tae i te paearu mō te aromatawai i te kounga; he rerekē te kounga o ngā paipa wai PP-R i ērā o ngā paipa PP-R, ā, kāore he pānga o te tae o te paipa wai ki tēnā (tērā atu anō ētahi atu tae kua tāpirihia ki te tae masterbatch). Ka taea te hanga i tētahi tae mena kei reira te tae masterbatch, ā, e kore e whakaiti, e pā rānei ki te kounga PP. Nō reira, kāore he pānga o ngā R ki te tae o te paipa wai.

I te nuinga o te wā, ko ngā rauemi mata PP-R parakore anake ka taea te whakamahi hei hanga taonga mā. Hei tauira, i te mea ko ētahi atu hua tae i tukatukahia ki ngā puranga tae matua ka whakakotahihia ki ngā rauemi hangarua, ngā rauemi para, me ngā rauemi kokonga, ko te tae o ngā hua i puta mai i te tāpiri i ngā rauemi hangarua, ngā rauemi para, me ngā rauemi kokonga kāore i te ngohengohe, i te kore taurite. Kāore te tae o te hua e pāngia e ngā rauemi i whakamahia, me ētahi atu. Me tino maeneene, me papatahi hoki ngā mata o roto, o waho hoki o te hua; kāore e whakaaetia ngā hapa pēnei i ngā mirumiru hau, ngā poka kanapa, ngā awaawa, me ngā poke.

Ko ngā rauemi taketake katoa mō ngā paipa wai PP-R pai he PP-R (kāore he tāpiritanga). He parakore te āhua, he mata maeneene, he kakau whakamarie hoki. He ngawari te āhua o ngā paipa PP-R rūpahu. I te nuinga o te wā, he ngāwari ake te whakauru i ngā paru ki ngā matūriki taratara; ko te polypropylene te wāhanga matua o ngā paipa PP-R. He kakara rerekē ngā paipa kino, engari kāore ngā paipa pai. I te nuinga o te wā, ka whakakotahihia te polyethylene, kaua te polypropylene.

Ko te pāmahana whakarewa noa mō ngā paipa PP-R kei waenganui i te 260 me te 290°C. Ka pai ake te kounga o te whakarewa i ēnei pāmahana. Ka taea e te hua te uru ngāwari ki te pane o te whakarewa i te wā whakarewa mena he noa ngā tawhā whakarewa. Hei tāpiri, he tata wai ngā pona kohikohinga hanumi o te hua, e tohu ana kāore i hangaia ki ngā rauemi mata PP-R tūturu.

Kāore hoki te hua i hangaia mai i ngā rauemi mata PP-R tūturu mēnā ka taea e ngā pona kohikohinga whakarewa te whakamatao me te totoka tere (i roto i te 10 hēkona te nuinga). Nā te mea he kaha ake te pānga tiaki wera o te PP-R, ko te tikanga ka puhoi ake te tere whakamatao.
Tirohia mēnā kua tuhia ngā hononga paipa, me te mea kua hē te whānui o roto o te paipa. Kāore e taea te tuhi i te whānui o roto o te paipa PP-R pai, ā, kāore e ngāwari te piko.