Te rerekētanga i waenga i te PET (polyp-benzene) me te PETG

PET: Poly(ethylene terephthalate) He tukanga hihiri e uru tahi ai ngā ahumahi rerekē, ngā ahumahi rerekē rānei o te ahumahi kotahi, e whakawhiti tahi ana, ā, i te mutunga ka hanumi ngātahi. #Mīhini hanga rau PET

PETG: Poly real (ethyleneterephthalateco - 1, 4 - cyclohexylenedimethylene terephthalate) #Mīhiniwhakaputa rauGAG

Ngā hua synovial PET#jwellPETsheet

Ko te polyethylene terephthalate PET, he polymer whakapūmau tēnei e whakamahia nuitia ana i roto i ngā kiriata takai kai me te muka kakahu me ētahi atu kaupapa. Ināianei, kei te piki haere tōna whakamahinga hei rauemi takai, ehara i te mea mō ngā pounamu inu houra anake, engari mō ngā kēne PET kore-kiriata (APET), ngā kēne PET kiriata (CPET) me ngā pereti. I roto i ngā tau e rima kua pahure ake nei, kua whakamahia te PET me te copolyester kounga hangarau, hei hua polymer hou, mō ngā rauemi takai hangarau me ngā rauemi takai motuhake.

Ko te angitu o te whakamahinga o te PET i roto i ngā rauemi tākai inu ngāwari nā tōna pakari me tōna mārama, tōna kaha ki te whakatakoto, tōna uara ōhanga pai rawa atu, me te whanaketanga o te hangarau tukatuka pounamu tere-teitei. He pai ngā painga o ngā kēne inu PET, arā, he māmā, he ātete ki te pakaru, he ngāwari ki te whakamahi anō, ā, he pai te mahi ārai-hau. He 24% te iti iho o te taumaha o te pounamu inu PET 2-rita kua whakakīia i tētahi pounamu karāhe rite. He 1/10 te taumaha o te pounamu karāhe kau i te rahi ōrite. Ka penapena i te mahi, te pūngao me ngā utu i roto i ngā hononga katoa mai i te kaihanga ki te kaihoko. #MīhiniHāngarua PET

Te matū me ngā āhuatanga

Ko te PET mō ngā pounamu inu ka hangaia mai i te waikawa terephthalic (TPA) i whiwhihia mā te waikura o te paraxylene. Ka taea te pure i te waikawa terephthalic, te tauhohe rānei ki te methanol hei whakaputa i te dimethyl terephthalate (DMT), ka taea rānei te waikura anō hei whakaputa i te waikawa terephthalic parakore (PTA). Ko tētahi atu rauemi taketake mō te PET ko te ethane, ka hurihia mā te tauhohenga ki te ethylene glycol (EG). Ko te PET he polycondensation i puta mai i te tauhohenga polymerization o te DMT (PTA rānei) me te EG i roto i te āhua rewa tonu, kātahi ka uru ki te tukanga polymerization totoka hei whiwhi i ngā kakano nui me te taumaha ngota whakamutunga, te matotoru tūturu. Mā te tukanga totoka ka iti ake te ihirangi etanoru o te polymer.

Ka rewa te kapia PET arumoni whānui i te 480F(), engari ko te pae rewa o te PET tioata nui ko te 520F(). He tino kaha te PET tioata aronga. He pakari, he mārama hoki, ā, he ātete ki ngā waikawa me ngā kawakore ngoikore me te maha o ngā whakarewa.

Akomanga motuhake #pōtaepōkai

Kei te wātea te PET totoro pupuhi-whakarewa i roto i te PET totoka, kakariki me te kōwhai mā. Kāore e hiahiatia he whakakotahitanga o ngā pūmua tae i roto i te tauhohenga e pā kino ana ki ngā āhuatanga ā-tinana, ā, e whakapai ake ana i te ōritetanga o te tae. He maha ngā kapia parakore me ngā matotoru ā-roto rerekē e wātea ana. Ka āta tio ngā copolymer PET, e āhei ai te hanga pounamu houra kounga teitei i raro i te whānuitanga o ngā tikanga tukatuka. Kei te wātea hoki he polymer pupuhi-whakarewa ka taea te whakaputa. He painga tēnei rauemi o te kaha rewa pai me te tere tio puhoi, ā, ka taea te tukatuka ngāwari i runga i ngā taputapu whakaputa me te pupuhi-whakarewa e tika ana. He maha ngā momo pūmua whakakaha, ātete mura me ētahi atu pūmua motuhake kei te whakaurua tonutia, kei te whakarerekētia rānei kia tutuki ai ngā tono hou. Ko ngā copolyester PETG tētahi atu tauira o te maha o ngā copolyester. Kāore i rite ki te PCTA whakarerekētia ki te waikawa, ko te PETG he pūmua whakarerekētia diol i hangaia mai i te CHDM diol i honoa ki te TPA (waikawa terephthalic) me te ethylene glycol. Ka taea te whakarewa, te whakaputa rānei i ngā copolymer PETG, ā, i te nuinga o te wā ka mau tonu ō rātou āhuatanga kore-āhua, mārama, me te kore tae, ahakoa i roto i ngā wāhanga whakawhiti nui. He tino pakari, he mārō, he pakari hoki, ahakoa i ngā pāmahana iti, ka mau tonu tōna pakari. Mā te whakakotahitanga o te mārama, te pakari me te kaha rewa ka taea te whakamahi mō te werohanga, te pupuhi me te whakaputa i ngā kōtaha, ngā ngongo, ngā kiriata me ngā pereti. 

Kei te wātea te PETG i te āhua kāore i whakarerekētia, i roto rānei i ngā tāpiringa maha, tae atu ki ngā kaihoko tuku, ngā puranga matua me ngā whakarerekē pānga, mō te hanga werohanga. 

Me whakamaroke te PETG i te 120 ~ 160F mō te 4~6 hāora i mua i te whakakoi, i te tākiritanga rānei. I ngā tukanga e rua, ko te pāmahana rewa kei waenga i te 420F me te 510F. Me whakapoto te wā pupuri pēhanga o ngā taputapu tukatuka i ngā pāmahana teitei ake kia kore ai e nui rawa te pirau. Me whakahaere te whakahāngai werohanga i runga i te mīhini werohanga, me 50% ki te 80% o tōna kaha te rahinga o ia werohanga. Ka taea te whakaputa me te pupuhi i te PETG i ngā pāmahana rewa i waenga i te 400-450F hei hanga hopi horoi makawe, hopi horoi wai, hua akuaku, hinu kohuke me ngā pounamu mārama mō ngā takai kai. Ka tutuki te rauemi i ngā paerewa a te FDA, ā, ka taea te pā atu ki te kai. Ka puta te whānuitanga o ngā kōtaha mai i te extrusion, tae atu ki ngā ngongo, ngā kiriata me ngā rau mō ngā takai, tae atu ki ngā takai taputapu hauora. Ka taea te whakahoromata i te PETG me te PCTA ki te ethylene oxide me ngā hihi Y. Ina whakamahia mō te whakakoi werohanga, ka tukatukahia te PETG i roto i te awhe pāmahana rewa o te 450-510F, ā, ko te pāmahana pokepokea he tata ki te 70-130F. Ko ngā whakamahinga o nāianei ko ngā taupoki taputapu, ngā whakangungu mīhini, ngā ipu whakapaipai, ngā tohu taputapu rīwhi, ngā wāhanga whakaaturanga, me ngā taonga takaro. Ko te PET te mea e whakamahia nuitia ana i roto i ngā takai inu ngohengohe. Tata ki te 100% o te mākete ipu tākai 2-rita kāore e taea te hangarua kua nohoia e te PET, ā, kua mōhiotia whānuitia hoki ngā pounamu PET 1.5 rita, 1 rita, 0.5 rita me ngā pounamu iti ake. E whakamahia ana te PET i roto i te kai, te waina me te hopi horoi. Ko te hiahia mō te PET mō ngā inu kore-waro me ngā takai hua ahumahi, e matapaetia ana ka piki haere tonu. Kei roto i ngā kai kua tākai ko te māti, ngā hua tine, te pata pīnati, ngā mea kakara, ngā hinu tunu kai, ngā kokotere me ngā wai hua kua whakaranua. Ngā tae hou, inā koa ko Wieber PET i roto i te rongoā. He rongonui ngā huaora me ngā wai horoi i roto i ngā takai. Ko tētahi o ngā tono hou rawa atu mō ngā ipu PET ko te takai kai, inu rānei, e hiahia ana kia whakakīia ki ngā pāmahana tiketike. He maha ngā kai, inā koa ko ngā hua rākau, ngā kai, ngā inu rānei he nui ngā hua rākau i roto, me takai ki te 180F, neke atu rānei. Mā tēnei ka taea te whakakore i ngā hua me ngā ipu i te wā e whakakīia ana. Ko ngā ipu e hāngai ana ki ngā inu ngohengohe me ngā putea tākai inu ngohengohe, ka mimiti, ka piro te āhua ina pāngia ki ngā pāmahana teitei ake i te 160T, nā te whakangāwari o te ahotea. Ka puta te kukū ahotea ina totorohia te ipu, ina pupuhihia hoki. Kua whakawhanakehia te hangarau ātete wera hei whakapai ake i te tukatuka, e mōhiotia whānuitia ana ko te hangarau "tautuhinga wera". E ai ki te tukanga tukatuka motuhake, he maha ngā taipitopito hangarau tukatuka, kua tino whai mana patent, e ai ki ēnei ipu ka taea te whakaputa e tika ana mō te whakaheke toto i te 190 ~ 195F. Ko ngā hua e hiahia ana ki te takai me tēnei āhuatanga ko te wai hua parakore. Ngā inu he nui te wai huarākau, ngā tī, ētahi inu isotonic me ngā inu hākinakina, ngā mea kakara, ngā wai hua kukū me ētahi wai kohuke. Ko ētahi atu whakamahinga mutunga mō te PET e whakamahia whānuitia ana i roto i ngā paninga whakapuru me ngā kiriata me ngā rau whakapuru. Ka whakamahia te PET hei rauemi paninga i whakaputahia mō ngā takai kāri ka taea te tunu, ā, ka taea hoki te whakamahi i te PET tioata (CPET) hei rauemi turanga mō te hanga pereti i roto i ngā oumu. Ko te kiriata PET he mea hanga ki ngā taha e rua o te anga, ā, e whakamahia ana hei kiriata whakaahua hihi-X me ētahi atu, hei takai mīti me te tiihi, hei rīpene aukume, hei whakamahana hiko, hei pereti tā me hei takai pounamu. Ka whakamahia hoki a PET hei rauemi rīpene ahumahi. Kei te tīmata te whānui o ngā kiriata me ngā rau PET kore āhua, kore-whakatakotoria hei hanga ipu, pereti, hua pahuka me kapu inu. Whakarāpopototanga: He putanga whakapai ake a PETG o te PET, he mārama ake, he pakari ake, he ātete pai ake ki ngā pānga, ā, he nui ake te utu.