Polyethylene terephthalate Ko te tauira matū ko -OCH2-CH2OCOC6H4CO- Ingoa Ingarihi: polyethylene terephthalate, whakarāpopototia ko PET, he pūmua teitei, i ahu mai i te tauhohenga whakamakuku maroke o te ethylene terephthalate. Ka whiwhi te ethylene terephthalate mā te tauhohenga esterification o te waikawa terephthalic me te ethylene glycol. He pūmua mā te miraka, he kōwhai mārama rānei te PET, he tino tioata, he mata maeneene, he kanapa. He tino pai ngā āhuatanga ā-tinana me ngā āhuatanga miihini i roto i te whānuitanga o te pāmahana. Ka taea e te pāmahana whakamahi roa te eke ki te 120°C. He tino pai te whakamarumaru hiko. Ahakoa i te pāmahana teitei me te auau teitei, he pai tonu ōna āhuatanga hiko, engari he ngoikore te ātete korona. He tino pai te ātete ngokingoki, te ātete ngenge, te ātete waku, me te pumau o te taha.
painga
1, he pai ngā āhuatanga miihini, ko te kaha pānga he 3 ~ 5 ngā wā o ētahi atu kiriata, ā, he pai te ātete takai.
2, ātete ki te hinu, te ngako, te waikawa waimeha, te kawakore waimeha, me te nuinga o ngā whakarewa.
3, he tino pai te ātete ki te pāmahana teitei me te pāmahana iti. Ka taea te whakamahi mō te wā roa i te whānuitanga pāmahana o te 120℃, ā, ka taea te tu atu i te pāmahana teitei o te 150℃ me te pāmahana iti o te -70℃ i roto i te whakamahinga poto, ā, he iti noa te pānga o ngā āhuatanga miihini o te pāmahana teitei me te pāmahana iti.
4, he iti te uruhanga o te hau me te kohu wai, arā, he pai te ātete ki te hau, te wai, te hinu me te kakara.
5, he mārama teitei, ka taea te aukati i ngā hihi ultraviolet, he kanapa pai.
6, kāore he paitini, kāore he reka, he pai te akuaku me te haumaru, ka taea te whakamahi tika mō te takai kai.
He pūmua tino mā, he kōwhai mārama rānei te PET, he mata maeneene, he kanapa. He pai te ātete ki te ngenge, te ātete ki te waku me te pumau o ngā āhuatanga, he iti te pakū me te pakeke teitei, me te tino pakari i waenga i ngā rauemi kirihou wera: he pai te whakamarumaru hiko, he iti te awe o te pāmahana, engari he iti te ātete ki te korona. He ātete ki te pāmahana, te huarere, he pai te pumau o te ātete matū, he iti te mimiti wai, he ātete ki ngā waikawa ngoikore me ngā whakarewa waro, engari kāore e rumakina ki te wai wera me te kawakore. He teitei te pāmahana whakawhiti karāhe o te kapia PET, he puhoi te tere tioata, he roa te huringa hanga, he roa te huringa hanga, he nui te whakahekenga o te hanga, he iti te pumau o ngā āhuatanga, he pakarukaru te hanga tioata, ā, he iti te ātete ki te wera. Mā te whakapai ake i te kaihoko ira, te kaihoko tioata me te whakapakari muka karāhe, kei a PET ēnei āhuatanga e whai ake nei hei tāpiri atu ki ngā āhuatanga o te PBT:
1, ko te pāmahana whakararuraru wera me te pāmahana whakamahinga roa te mea teitei rawa atu i roto i ngā rauemi whānui-whakamahinga thermoplastic.
2, nā te mea he nui tōna ātete ki te wera, ka rumakina te PET whakakaha ki roto i te kaukau honohono i te 250°C mō te 10 hēkona, ā, kāore e rerekē te tae. He tino pai mō te whakarite i ngā wāhanga hiko me ngā wāhanga hiko kua honohonoa.
3, ko te kaha piko he 200Mpa, ko te modulus rapa he 4000Mpa, he tino pai hoki te ātete ki te ngoki me te ngenge, he teitei te pakeke o te mata, ā, he rite ngā āhuatanga hangarau ki ngā kirihou thermosetting.
4, nā te mea ko te ethylene glycol e whakamahia ana i roto i te hanga PET he tata ki te haurua o te utu o te butylene glycol e whakamahia ana i roto i te hanga, ko te kapia PET me te PET whakapakaritia te utu iti rawa i waenga i ngā kirihou hangarau, ā, he nui te utu.