Uyini umehluko phakathi kwesilwane ne-petg?

Thinta ngothando, i-polycondensite, isetshenziswa ikakhulukazi kumafilimu wokupakisha wokudla kanye nemicu yendwangu, phakathi kwezinye izinhlelo zokusebenza. Manje isetshenziswa kakhulu njengezinto ezifakwayo, hhayi emabhodleleni e-soda kuphela, kodwa futhi nasezilwaneni ze-amorphous (amet), i-crystalline pet (cpep) amathini namapuleti. Eminyakeni emihlanu edlule, i-Engineering-grade-pet kanye nama-copolyyesters, njengemikhiqizo emisha ye-polymer, isetshenziswe ezintweni zokufaka zobunjiniyela kanye nezinto ezikhethekile zokupakisha, ngokulandelana.
Impumelelo yezilwane ezifuywayo e-Soda Packaging ingenxa yobunzima bayo nokubonakala, amakhono okuqala, inani lezomnotho elihle kakhulu, kanye nokuthuthukiswa kobuchwepheshe bokucubungula kwebhodlela eliphakeme. Amathini wesiphuzo esifuywayo angasindi, e-shatterproof, abuye asebenze, futhi ane-airtight enhle. Ibhodlela lesiphuzo esigcwalisiwe esigcwalisiwe esingu-2 Ibhodlela elingenalutho linesisindo esingu-1/10 sebhodlela lengilazi elilinganayo. Lokhu kusindisa umsebenzi, amandla, nezindleko kuzo zonke izixhumanisi ezivela kumkhiqizi kuya kwabathengi.
Chemistry kanye izakhiwo

I-PET yamabhodlela kaBeeverage akhiqizwa kusuka ku-terephthalic acid (TPA) etholwe nge-oxidation ye-P-XYLENE. I-Teerephthalic acid ihlanjululwa noma yaphendulwa nge-methanol ukwakha i-Dimethyl Terephthalate (DMT), noma iqhubekile i-oxidized ukwakha i-Terephthalic acid (PTA). Okunye okuyisisekelo okuqukethwe okuyisisekelo kwesilwane, okuguqulwa ku-ethylene glycol (isib.) Ngokuphendula. I-PET is a polymer i-polymer eyakhiwe yi-polymerization eqhubekayo ye-DMT (noma i-PTA) bese isib. Inqubo yombuso oqinile futhi yenza okuqukethwe kwe-ethanol kwe-polymer kuphansi ngokwanele.

I-General Commerce Pet Resin incibilika cishe ngo-480f (), kepha iphuzu elincibilikayo lesilwane esiphakeme se-crystalline licishe libe ngu-520F ().

Isilwane esise-Crystallized Pet sinamandla amahle kakhulu. Ubunzima nokusobala, futhi kumelana nama-acid abuthakathaka, izisekelo nama-solvent amaningi.

Amabanga akhethekile

Slock Blow Ukuhlanganisa ibanga lesilwane kunganikeza umbala oqinile, oluhlaza okotshani nokukhanya okuphuzi. I-polymer enemibala ku-reactor ayidingi ukuthi ihlanganiswe ngemiphumela emibi kwizakhiwo ezibonakalayo, futhi ithuthukise ukufana kombala. Ama-rencins amsulwa we-viscosities ahlukahlukene angaphakathi ayatholakala. I-Pet CopolyMoners ikhazimula kancane kancane, okubavumela ukukhiqiza amabhodlela asezingeni eliphakeme we-soda ngaphezulu kwezimo eziningi zokucubungula. I-polymer ekhishini ekhipha amandla iyatholakala. Lokhu okuqukethwe kuhlanganisa izinzuzo zamandla amahle ancibilikise futhi anciphise i-crystallization, futhi angacutshungulwa kalula kwimishini yokubumba efanelekile. I-redforant ehlukahlukene eqinisiwe, i-flame retardant namanye ama-polymers akhethekile ahlala wethulwa noma aguqulwe ukuze ahlangabezane nezicelo ezintsha.

IncekuzelaICopolyester inesinye isibonelo senani elikhulu lamaphoyisa. Ngokungafani ne-PCTA, okuguqulwa nge-acid, i-petg i-polymer eguquliwe ye-diol eyenziwe ngokuhlanganisa i-CHDM Diol nge-TPA (Teerephthalic acid) ne-Ethylene Glycol. Ama-Petg Copolymers angabunjwa noma akhishwe futhi ajwayele ukuhlala ama-amorphoous, asobala futhi angenamibala, ngisho nasezigabeni ezinkulu zesiphambano.

Inokuqina okuphezulu, ubulukhuni kanye nobunzima obuhle, ngisho nasemazingeni okushisa aphansi. Inhlanganisela yokusobala, ubulukhuni kanye nokuncibilika amandla okwenza kube wusizo ekubumbeni umjovo, ukushaya ngamandla nokukhishwa kwamaphrofayili, amapayipi, amafilimu namashidi. I-Petg iyatholakala ngefomu elingagunyaziwe noma ngezithasiselo ezahlukahlukene, kufaka phakathi ama-ejenti wokukhipha, ama-masterbatches, kanye nezindlela zokutholwa zomthelela wokubumba kokujova.

I-Petg kufanele yomiswe ku-120-60f cishe amahora angama-4-6 ngaphambi kokubumba noma ukukhishwa. Kuzo zombili izinqubo, izinga lokushisa elincibilikayo lisuka ku-420F liye ku-510f. Isikhathi sokubamba imishini esezingeni eliphakeme emazingeni okushisa aphezulu kufanele kube mfushane ngangokunokwenzeka ukuvikela ukonakala ngokweqile. Ukubumba komjovo kufanele kwenziwe emshinini wokuhlanganisa umjovo, okudinga ukuthi kudutshulwe ngakunye kube ngu-50% kuya ku-80% womthamo wawo.

I-PETG ingakhishwa futhi iqhume ukuvungulwa okubunjiwe kumazinga okushisa ancibilikile phakathi kwamabhodlela asobala we-shampoo, okokuhlanza uketshezi, imikhiqizo yenhlanzeko, owoyela wokudla, nokupakishwa kokudla. Le nto ihlangabezana namazinga e-FDA okuxhumana nokudla.

Ukukhishwa kungakhiqiza amaphrofayli anhlobonhlobo, kanye namashubhu wokupakisha, amafilimu namashidi, kufaka phakathi ukufakwa kwedivayisi yezokwelapha. I-Petg ne-PCTA ingafakwa inzalo nge-ethylene oxide nemisebe Y y.

Lapho isetshenziselwa ukubumba komjovo, i-Petg ivame ukucutshungulwa ngohla lokushisa oluncibilikayo lwe-450-510f, ngokushisa okubumba cishe ngo-70-130f. Izicelo zamanje zifaka isembozo sensimbi, izihlangu zomshini, iziqukathi zezimonyo, izikhombisi zedivayisi ye-lever, izikhombisi zokubonisa namathoyizi.

I-PET isetshenziswa ikakhulukazi ku-soda kanye nokupakishwa okuthambile kwesiphuzo. I-PET icishe ibe yi-100% yemakethe yokufaka okungu-2-ukufakwa kabusha kwemakethe yesitsha, kanye ne-1.5-litre, amabhodlela ezilwane ezi-1, amalitha ayi-1

I-PET isetshenziswa ekudleni, utshwala, okokuhlanza. Isidingo sesilwane esifunwayo kulindeleke ukuthi siqhubeke nokukhula kweziphuzo ezihlangene kanye nokupakishwa komkhiqizo wezimboni. Ukudla okuhlanganisiwe kufaka imikhiqizo yesinaphi, irabha, ibhotela lamantongomane, izinkomba, uwoyela wokupheka, ama-cocktails nama-juices agxile. Imibala emisha, ikakhulukazi imibala ye-Weber, iyathandwa ekuphaketheni kwemithi, amavithamini kanye nokuhlanza.

Enye yezicelo ezintsha kakhulu futhi ezisheshayo ezikhulayo zeziqukathi zezilwane ukudla noma ukufakwa kwesiphuzo, okudinga ukugcwaliswa kwamazinga okushisa aphezulu. Ukudla okuningi, ikakhulukazi izithelo noma ukudla noma iziphuzo ezinokuqukethwe okuphezulu kwezithelo, kufanele zifakwe ku-180f noma ngaphezulu. Lokhu kuhlinzeka nge-pasteurization (inzalo) yomkhiqizo nesiqukathi ngesikhathi sokugcwaliswa. Iziqukathi ezijwayelekile ezithambekele, ezinjengezikhwama ze-soda neziphuzo ezithambile, zithambekele ekunciphiseni nasekunciphiseni lapho kubhekiswa emazingeni okushisa angenhla kwe-160f, kungenxa yokuphumula okuthile kwengcindezi. Ukuhlushwa kwengcindezi kukhiqizwa ngesikhathi sokuvuselelwa kwesitsha sesitsha. Ubuchwepheshe benzelwe ukuthuthukisa ukumelana nokushisa ngesikhathi sokucubungula, okuvame ukubizwa ngokuthi "ukushiswa kokushisa" ubuchwepheshe. Ngokuya ngobuchwepheshe obuthile bokucubungula, kunemininingwane eminingi yobuchwepheshe bokucubungula, okuphathelene kakhulu, okusekelwe kuzo iziqukathi ezifanele ukugcwaliswa ngo-190-195F. Imikhiqizo edinga ukupakishwa ngalesi sici kufaka phakathi amajusi ahlanzekile wezithelo. Iziphuzo eziphakeme zejusi, itiye, iziphuzo ezithile ze-isotonic nezemidlalo, izinkokhelo, ama-juices acekeziwe kanye namanzi athile angamaminerali.

Okunye ukusetshenziswa kwezilwane ezifuywayo kusetshenziswa kabanzi kwi-Coating ye-Extrusion kanye nefilimu extsasion kanye neshidi. I-PET isetshenziswa njenge-extrusion coation expression yokupakisha ebhodini elingapheli. Ngaphezu kwalokho, i-crystalline pet (cpep) ingasetshenziswa njengezinto eziyisisekelo ukwenza amathreyi e-oven.

Ifilimu lePet livame ukuqondiswa ngokukhanya futhi lisetshenziswe njenge-x-ray namanye amafilimu wezithombe, inyama kanye nokupakisha ushizi, amathempeli kazibuthe, ukufakwa kukagesi, amapuleti okuphrinta kanye nezikhwama zokuphrinta. I-PET isetshenziswa futhi njengezinto zetayitela zezimboni. I-non-crystalline, ifilimu elingakaze libe ne-pet neshidi liqala ukusetshenziselwa ukwakha iziqukathi, amathreyi, imikhiqizo yegwebu kanye nezindebe zokuphuza.

Isifinyezo: I-Petg yinguqulo ethuthukisiwe yesilwane, enokubanjiswa okuphezulu, ubunzima obuphakeme, ukumelana nomthelela ongcono, futhi ngentengo ephakeme.