He maha ngā kiritaki mā te paetukutuku e waea mai ana ki te tuku tohutohu mō te rongonuitanga o ngā momo putea whatu, ā, i tēnei rā ka whakamārama a DongLai Xiaobian i te rongonuitanga o ngā momo putea whatu.
Ngā momo putea whatu
Ka kiia hoki ngā pēke whatu he pēke hiako nakahi. He momo kirihou, e whakamahia ana mō te tākai. Ko te nuinga o te wā he polyethylene, he polypropylene me ētahi atu rauemi kirihou matū. Anei he whakataki poto mō te momo pēke whatu me tana whakamahinga.
Ko te polyethylene te rauemi matua o te hanga ki tāwāhi, ko te polypropylene te hua matua o te kāinga. He kapia thermoplastic i hangaia mā te polymerization o te ethylene. I roto i te ahumahi, kei roto hoki ngā copolymers o te ethylene me te iti o te α-olefin. Kāore he kakara o te polyethylene, kāore he paitini, he ware pi, he ātete pai ki te pāmahana iti (te pāmahana whakahaere iti rawa tae atu ki te -70 ~ -100 ℃), he pumau matū pai, he ātete ki te waikura waikawa me te kawakore (ātete waikawa, waikura), kāore e rewa i roto i ngā whakarewa whānui i te pāmahana rūma, he iti te mimiti wai, he pai te mahi whakamahana hiko; Heoi, he tino tairongo te polyethylene ki ngā pēhanga 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, i runga i te hanganga ngota me te mātotoru. Ka taea e ngā tikanga whakaputa rerekē te whakaputa i ngā mātotoru rerekē (0.91-0.96g/cm3). Ka taea te tukatuka i te polyethylene i te ara kotahi e hangaia ai ngā kirihou thermoplastic noa (tirohia te tukatuka kirihou). He whānuitia te whakamahinga mō te hanga kiriata, ipu, paipa, waea kotahi, waea me te taura, ngā mea e hiahiatia ana i ia rā, me ētahi atu. 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, tata ki te 1/4 o te hanga kirihou katoa. I te tau 1983, ko te kaha hanga polyethylene katoa o te ao he 24.65 tāne mita, ā, ko te kaha o te tipu kei te hangaia he 3.16 tāne mita.
Polypropylene (PP)
He kapia kirihou wera i hangaia mā te whakakotahitanga o te propylene. E toru ngā momo whirihoranga, arā, he isotopic katoa, he atactic me te indirect. Ko ngā hua ahumahi he mea hanga mai i ngā hanganga isotopic. Kei roto hoki i te polypropylene he copolymer o te propylene me te iti o te ethylene. He totoka mārama, kāore he tae, kāore he kakara, kāore hoki he paitini. Nā te hanganga o te kirihou, he teitei te tioata, he rewa tae atu ki te 167 ℃, he ātete wera. 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 he iti te ātete pānga i te pāmahana, he ngāwari ki te tawhito, engari ka taea te whakarerekē me te tāpiri i te antioxidant hei whakakore.
He mā, he mā-parauri rānei te tae o te putea whatu, kāore he paitini, kāore hoki he reka, he iti ake te kino ki te tinana tangata. Ahakoa he maha ngā momo kirihou matū i hangaia ai, he kaha tonu te tiaki i te taiao, ā, he kaha anō hoki ki te hangarua.
He whānui te whakamahinga o te putea whatu, e whakamahia ana mō te tākai i ngā momo taonga, ā, e whakamahia whānuitia ana hoki i roto i te ahumahi;
He pēke whatu kirihou me te kapia polypropylene hei rauemi mata matua, ka whakatōkia, ka totoro hei miro papatahi, kātahi ka whatuhia hei pēke.
He putea whatu kirihou hiato me te kakahu whatu kirihou hei rauemi turanga, mā roto i te whakakikorua rere.
Whakamahia mō te tākai i ngā rauemi totoka paura, kirikiri rānei, me ngā taonga ngāwari. E rua ngā putea whatu kirihou hiato i roto i te putea kotahi, e toru hoki i roto i te 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 taha raro, te putea whakauru me te putea tuitui pania ki te kāpia.
I runga i te whānui whai hua o te putea, ka taea te wehewehe ki te 450, 500, 550, 600, 650 me te 700 mm. Me whakaae ngā taha e rua ki ngā whakatakotoranga motuhake.
Kei runga ake nei te rongonui o ngā mahi whakapaipai iti mō ngā momo whakaotinga putea whatu katoa, mā te tiritiri i ngā ihirangi, tae atu ki te rongonuitanga o ngā momo putea whatu he momo mātauranga motuhake. Ki te hiahia koe ki te hohonu ake ki te putea o ngā mōhiohio mākete, whakapā atu ki te kaihoko i roto i tā mātou kamupene, ki te taha rawhiti rānei me te rangahau putea whatu i te wā tonu, ka kōrerohia te whakawhitiwhiti kōrero i roto i tēnei tuhinga.
Wā tuku: Hanuere-15-2021