Kupu Whakataki: Hei tētahi o ngā kirihou whānui e whakamahia whānuitia ana, ka kitea te PP i ngā wāhi katoa o te ao o ia rā. He nui ake tōna parakore i te rorohiko noa. Ahakoa kāore i te rite te tae ki te ABS, he nui ake te parakore me te whakaputa tae o te PP. I roto i te ahumahi, he maha ngā wā ka whakamahia te rauemi PP i roto i ngā rauemi tākai pēnei i tengā pounamu kirihou, ngā taupoki pounamu, ngā pounamu kirīmi, me ētahi atu. Kua whakatauhia ahau eMōkihi RBā, ka tohaina ki te mekameka tuku hei tohutoro:
Ingoa matū: Polypropylene
Ingoa Pākehā: Polypropylene (e kiia nei ko PP)
He pūhui tioata te PP. I roto i ngā kirihou e whakamahia whānuitia ana, ko te PP te mea māmā rawa, ko te 0.91g/cm3 anake te matotoru (iti iho i te wai). I roto i ngā kirihou whānui, ko te PP te mea tino ātete ki te wera. Ko tōna pāmahana whakapōturi wera ko te 80-100°C, ā, ka taea te kohuatia ki te wai kohua. He pai te ātete ki te pakaru ahotea me te roa o te piko me te ngenge. E mōhiotia whānuitia ana ko te "kirihou 100%". He pai ake te mahi whānui a te PP i tērā o te rauemi PE. He māmā te taumaha o ngā hua PP, he pakari, he ātete matū pai hoki.
Ngā ngoikoretanga o te PP: he iti te tika o ngā āhuatanga, he koretake te pakari, he ngoikore te ātete ki te huarere, he ngāwari ki te whakaputa "kino parahi", he āhuatanga whakaheke i muri i te whakawhāititanga, he ngāwari ki te tawhito, ki te pakarukaru, me te ngāwari ki te whakapēke i muri i te whakawāteatanga.
01
Ngā āhuatanga whakapūtanga
1) He iti te waikura o te rauemi tioata, ā, he ngāwari ki te rewa, ā, he ngāwari ki te pirau ina roa te whakapā atu ki te konganuku wera.
2) He pai te rere o te wai, engari he nui te whānuitanga o te whakahekenga me te uara whakahekenga, ā, he ngāwari te puta o ngā kōhao whakahekenga, ngā pakaru, me te whakarerekētanga.
3) He tere te tere o te whakamatao, me āta whakamarara te pūnaha ringihanga me te pūnaha whakamatao i te wera, me te aro ki te whakahaere i te pāmahana whakahāngai. He ngāwari te whakatakoto i te pāmahana rauemi i te pāmahana iti me te pēhanga teitei. Ina iti iho te pāmahana o te whakahāngai i te 50 nekehanga, kāore te wāhanga kirihou e maeneene, ā, he ngāwari ki te whakaputa i te whakarewanga ngoikore, ngā tohu rere, me te ngāwari ki te piko me te whakarerekē i runga ake i te 90 nekehanga.
4) Me ōrite te matotoru o te pakitara kirihou kia kore ai e kore he kāpia, me ngā kokonga koi kia kore ai e kukū te ahotea.
02
Ngā āhuatanga o te tukanga
He pai te rere o te PP i te pāmahana rewa, ā, he pai hoki te mahi hanga. E rua ngā āhuatanga o te PP i roto i te tukatuka.
Tuatahi: Ka tino heke te matotoru o te rewa PP i te pikinga o te tere kutikuti (kaore i te tino pāngia e te pāmahana)
Tuarua: He teitei te taumata o te takotoranga ngota, ā, he teitei te tere whakaheke.
Ko te pāmahana tukatuka o te PP kei te 200-300℃. He pai te pumau o te wera (ko te pāmahana pirau he 310℃), engari i te pāmahana teitei (270-300℃), ka pirau pea mēnā ka noho roa ki roto i te oko. Nā te mea ka tino heke te matotoru o te PP me te pikinga o te tere kutikuti, mā te whakanui ake i te pēhanga werohanga me te tere werohanga ka piki ake tōna rere, ka pai ake te whakarerekētanga me te whakahekenga o te whakahekenga. Me whakahaere te pāmahana pokepokea i roto i te awhe 30-50℃. Ka taea e te PP rewa te haere mā roto i tētahi āputa pokepokea tino whaiti ka puta ki mua. I roto i te tukanga rewa o te PP, me mimiti e ia te nui o te wera o te hanumi (he wera motuhake nui ake), ā, ka wera ake te hua i muri i te maka atu i te pokepokea. Kāore e hiahiatia kia whakamarokehia te rauemi PP i te wā tukatuka, ā, he iti iho te tere whakahekenga me te tioata o te PP i tō te PE.
03
Ngā mea hei mōhio mā te tukatuka kirihou
Te tukatuka kirihou
He mā te rei mārama te PP parakore, ā, ka taea te tae ki ngā tae rerekē. Ka taea anake te tae i te PP mā te whakamahi i te tae masterbatch i runga i ngā mīhini hanga werohanga whānui, engari ko ētahi tauira he huānga kirihou motuhake e whakapakari ana i te pānga whakaranu, ā, ka taea hoki te tae ki te toner.
Ko ngā hua e whakamahia ana i waho, he mea whakakī ki ngā mea whakaū UV me te pango waro. Kaua te ōwehenga whakamahinga o ngā rauemi hangarua e neke ake i te 15%, ki te kore ka heke te kaha, ka pirau, ka rerekē te tae. Ko te tikanga, kāore e hiahiatia he maimoatanga whakamaroke motuhake i mua i te tukatuka werohanga PP.
Kōwhiringa mīhini whakarewa werohanga
Kāore he whakaritenga motuhake mō te whiriwhiri i ngā mīhini whakarewa werohanga. Nā te mea he teitei te tioata o te PP. Me whakamahi he mīhini whakarewa werohanga rorohiko me te pēhanga werohanga teitei ake me te mana whakahaere maha-wāhanga. Ko te kaha piri ka whakatauhia i te nuinga o te wā e 3800t/m2, ā, ko te rōrahi werohanga he 20%-85%.
Te hoahoa o te pokepokea ai me te kuaha
Ko te pāmahana o te pokepokea ai he 50-90℃, ā, ko te pāmahana teitei o te pokepokea ai e whakamahia ana mō ngā rahi teitei ake. Ko te pāmahana matua he iti iho i te pāmahana o te kōhao i te 5℃, ko te diameter o te oma he 4-7mm, ko te roa o te kuaha ngira he 1-1.5mm, ā, ko te diameter ka taea te iti ki te 0.7mm.
Kia poto rawa te roa o te keti taha, kia 0.7mm pea, ko te hōhonutanga he haurua o te matotoru o te pakitara, ā, ko te whānui he rua te matotoru o te pakitara, ā, ka piki haere mārire me te roa o te rere rewa i roto i te kōhao.
Me pai te putanga hau o te pokepokea ai. Ko te hohonu o te kōhao putanga he 0.025mm-0.038mm, ā, ko te matotoru he 1.5mm. Hei karo i ngā tohu mimiti, whakamahia ngā pūwero nui, porowhita, me ngā pūwero porowhita, ā, me iti te matotoru o ngā rara (Hei tauira, 50-60% o te matotoru o te pakitara).
Kaua te matotoru o ngā hua i hangaia ki te homopolymer PP e neke ake i te 3mm, ki te kore ka puta he mirumiru (ko ngā hua pakitara matotoru ka taea anake te whakamahi i te copolymer PP).
Te pāmahana rewa
Ko te ira rewa o te PP he 160-175°C, ā, ko te pāmahana pirau he 350°C, engari kāore e taea te whakatakoto i te pāmahana neke atu i te 275°C i te wā e tukatukahia ana. Ko te pāmahana i roto i te wāhanga rewa he pai ake i te 240°C.
Tere werohanga
Hei whakaiti i te ahotea ā-roto me te whakarerekētanga o te āhua, me whiriwhiri te werohanga tere-teitei, engari kāore e tika ana ētahi momo PP me ngā pokepokea ai (ngā mirumiru me ngā aho hau i roto i te koroka tangata). Mena ka puta he rārangi mārama me ngā rārangi pōuri i te mata tauira e horapa ana e te kuaha, me whakamahi te werohanga tere-iti me te pāmahana pokepokea ai teitei ake.
Pēhanga whakarewa whakamuri
Ka taea te whakamahi i te pēhanga whakamuri o te piripiri rewa 5bar, ā, ka taea te whakarite i te pēhanga whakamuri o te rauemi toner kia tika.
Werohanga me te pupuri pēhanga
Whakamahia he pēhanga werohanga teitei ake (1500-1800bar) me te pēhanga pupuri (tata ki te 80% o te pēhanga werohanga). Hurihia ki te pēhanga pupuri i te tata ki te 95% o te whiu katoa, ā, whakamahia he wā pupuri roa ake.
Te tukatuka i muri i ngā hua
Hei ārai i te mimiti me te whakarerekētanga i puta mai i te whakatiotanga i muri i te tioata, me rumaki ngā hua ki te wai wera.
Kamupene Ahumahi Āniwaniwa o Shanghai, Ltdko te kaihanga,Mōkihi āniwaniwa o ShanghaiWhakaratohia he takai whakapaipai kotahi-mutu. Mena he pai ki a koe ā mātou hua, ka taea e koewhakapā mai,
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Wā tuku: Oketopa-04-2021