Ko te nuinga o te hanga i tāwāhi ko te polyethylene (PE), ko te nuinga o te hanga i roto i te whare ko te polypropylene (PP), he momo kapia thermoplastic i hangaia mā te polymerization ethylene. I roto i te ahumahi, kei roto hoki ngā copolymers o te ethylene me te iti o te -olefin. Ko te polyethylene kāore he kakara, kāore he paitini, he rite ki te ware pi, he ātete pai ki te pāmahana iti (ko te pāmahana whakamahi iti rawa ka taea te tae ki te -70 ~ -100℃), he pumau matū pai, ka taea te tu atu ki te nuinga o te waikawa me te alkali (karekau he waikura o te waikawa), kāore e rewa i te pāmahana rūma i roto i ngā whakarewa whānui, he iti te mimiti wai, he pai te mahi whakamahana hiko; engari he tairongo te polyethylene ki ngā ahotea taiao (ngā pānga matū me te miihini) ā, he iti te ātete ki te koroheketanga wera. He rerekē ngā āhuatanga o te polyethylene i ia momo, ko te nuinga kei runga i te hanganga ngota me te mātotoru. Ka taea te whiwhi i ngā hua he rerekē te mātotoru (0.91 ~ 0.96g/cm3) mā te whakamahi i ngā tikanga hanga rerekē. Ka taea te tukatuka i te polyethylene mā te tikanga whakahāngai thermoplastic whānui (tirohia te tukatuka kirihou). He whānuitia te whakamahinga i roto i te hanga kiriata, ipu, paipa, waea kotahi, waea me te taura, ngā mea e hiahiatia ana i ia rā, me ētahi atu, ā, ka taea te whakamahi hei rauemi whakamahana auau-teitei mō te pouaka whakaata, te radar, me ētahi atu. Nā te whanaketanga o te umanga matū hinu, kua tere te whanaketanga o te hanga polyethylene, ko te putanga he tata ki te 1/4 o te katoa o te hanga kirihou. I te tau 1983, ko te katoa o te kaha hanga o te polyethylene he 24.65Mt, ā, ko te kaha o te tipu kei te hangaia he 3.16Mt.
Polypropylene (PP)
He kapia kirihou wera i hangaia mā te whakakotahitanga o te propylene. E toru ngā whirihoranga o ngā hua isochronous, unregulated me interchronous, ā, ko ngā hua isochronous ngā wāhanga matua o ngā hua ahumahi. Kei roto hoki i te polypropylene ngā copolymers o te propylene me te iti o te ethylene. Ko te tikanga he mārama, he totoka, he kore tae, he kore kakara, he kore paitini. Nā te mea he ma te hanganga, he tino tioata hoki, nō reira ko te ira rewa tae atu ki te 167℃, he ātete wera, ka taea te whakamahi i ngā hua ki te patu huakita mamaoa ko ōna painga tino pai. Me te mātotoru o te 0.90g/cm3, koinei te kirihou māmā rawa atu. He pai ake te ātete ki te waikura, te kaha kume 30MPa, te kaha, te pakari me te mārama i te polyethylene. Ko te ngoikoretanga ko te ātete pānga pāmahana iti me te ngawari ki te koroheke, ka taea te wikitoria mā te whakarerekē me te tāpiri i te antioxidant.
Ko te tae o te putea whatu he mā, he hina rānei, kāore he paitini, kāore he reka, he iti ake te kino ki te tinana tangata, ahakoa he maha ngā momo kirihou matū i hangaia ai, engari he kaha ake tōna tiaki taiao, ā, he nui ake te kaha hangarua;
He whānuitia te whakamahinga o ngā putea whatu, e whakamahia ana mō te tākai me te whakakī i ngā momo tuhinga, e whakamahia whānuitia ana i roto i te ahumahi;
Ko te putea whatu kirihou he mea hanga ki te kapia polypropylene hei rauemi mata matua, ka whakaputaia, ka totorohia hei hiraka papatahi, kātahi ka whatuhia, ka hangaia he putea.
Ko te putea whatu kirihou hiato he mea hanga mai i te kakahu whatu kirihou, he mea hanga mā te tikanga hurihuri.
E whakamahia ana tēnei raupapa hua mō te tākai i ngā rauemi paura, i ngā rauemi kirikiri rānei, me ngā taonga ngāwari. E rua ngā putea whatu kirihou hiato hei putea kotahi, e toru hei putea kotahi, e ai ki te hanganga rauemi matua.
E ai ki te tikanga tuitui, ka taea te wehewehe ki te tuitui putea raro, te tuitui putea raro, te putea whakauru me te putea here.
E ai ki te whānui whai hua o te putea, ka taea te wehewehe ki te 350, 450, 500, 550, 600, 650 me te 700mm. Me whakaae ngā taha e rua ki ngā whakaritenga motuhake.
Wā tuku: Hepetema-28-2020