Bambanci tsakanin PET (polyp-benzene) da PETG

PET: Poly(ethylene terephthalate) Tsarin aiki mai ƙarfi wanda masana'antu daban-daban ko masana'antu daban-daban na masana'antu ɗaya ke haɗuwa, su haɗu, sannan a ƙarshe su haɗu. # Injin yin takarda na PET

PETG: Poly real (ethyleneterephthalateco - 1, 4 - cylclohexylenedimethylene terephthalate) #Mashinan GaGSheetextrusion

Kayayyakin synovial na PET #jwellPETsheet

PET polyethylene terephthalate wannan polymer mai narkewa ana amfani da shi ne galibi a cikin fim ɗin marufi na abinci da zare na yadi da sauran dalilai. Yanzu, amfani da shi azaman kayan marufi yana ƙaruwa, ba wai kawai don kwalaben abin sha na soda ba, har ma ga gwangwani da saucers na PET marasa kristal (APET), gwangwani na PET (CPET) na kristal. A cikin shekaru biyar da suka gabata, an yi amfani da PET na injiniya da copolyester, a matsayin sabbin samfuran polymer, don injiniyanci da kayan marufi na musamman, bi da bi.

Nasarar amfani da PET a cikin kayan marufi na abin sha mai laushi ya faru ne saboda tauri da bayyanawa, iyawar daidaitawa, ƙimar tattalin arziki mai kyau da kuma haɓaka fasahar sarrafa kwalba mai sauri. Gwangwanin abin sha na PET suna da fa'idodin nauyi mai sauƙi, juriya mai ƙarfi, sake amfani da su da kuma kyakkyawan aikin hana iska shiga. Kwalbar abin sha na PET mai cike da lita 2 tana da ƙasa da kashi 24% fiye da kwalbar gilashi iri ɗaya. Kwalbar da babu komai tana da nauyin 1/10 na kwalbar gilashin girman iri ɗaya. Tana adana aiki, kuzari da farashi a kowace hanya daga mai samarwa zuwa mai amfani. # Injin sake amfani da PET

Sinadaran sinadarai da kaddarorinsu

Ana samar da PET don kwalaben abin sha daga terephthalic acid (TPA) da aka samu ta hanyar oxidation na paraxylene. Ana iya tsarkake ko kuma a mayar da martani ga terephthalic acid da methanol don samar da dimethyl terephthalate (DMT), ko kuma a ƙara oxidize don samar da tsantsar terephthalic acid (PTA). Sauran kayan aikin PET shine ethane, wanda ake canzawa ta hanyar amsawa zuwa ethylene glycol (EG). PET wani polycondensation ne da aka samar ta hanyar polymerization reaction na DMT (ko PTA) da EG a cikin yanayin narkewa mai ci gaba, sannan a cikin tsarin polymerization mai ƙarfi don samun manyan hatsi da nauyin ƙwayoyin halitta na ƙarshe, danko na ciki. Tsarin yanayin mai ƙarfi kuma yana sa abun ciki na ethanol na polymer ya yi ƙasa sosai.

Resin PET na kasuwanci gabaɗaya yana narkewa a kusan 480F(), amma wurin narkewar PET mai yawan lu'ulu'u shine kusan 520F(). PET mai lu'ulu'u a alkibla yana da ƙarfi mai kyau. Tauri da bayyanawa, da juriya ga acid mai rauni da tushe da sauran abubuwa masu narkewa da yawa.

Aji na musamman #kwalba mai laushi

Ana samun PET mai kauri, kore da rawaya mai haske a cikin PET mai ƙarfi. Polymers masu launi a cikin reactor ba sa buƙatar haɗuwa wanda ke shafar halayen jiki da inganta daidaiton launi. Akwai nau'ikan resins masu tsabta iri-iri tare da viscosities daban-daban na ciki. PET copolymers suna yin lu'ulu'u a hankali, wanda ke ba da damar samar da kwalaben soda masu inganci a ƙarƙashin yanayi daban-daban na sarrafawa. Hakanan akwai polymer mai kauri da aka fitar. Wannan kayan yana da fa'idodin ƙarfin narkewa mai kyau da saurin lu'ulu'u a hankali, kuma ana iya sarrafa shi cikin sauƙi akan kayan aikin extrusion da busawa masu dacewa. Ana ci gaba da gabatar da nau'ikan polymers masu ƙarfi, masu hana harshen wuta da sauran polymers na musamman don dacewa da sabbin aikace-aikace. PETG copolyesters wani misali ne na copolyesters da yawa. Ba kamar PCTA da aka gyara da acid ba, PETG polymer ne da aka gyara da diol wanda aka yi da CHDM diol tare da TPA (terephthalic acid) da ethylene glycol. Ana iya ƙera ko fitar da PETG copolymers kuma gabaɗaya suna riƙe da halayensu marasa tsari, bayyanannu, da kusan marasa launi, koda a cikin manyan sassan giciye. Yana da ƙarfi, tauri da kuma ƙarfi mai kyau, ko da a yanayin zafi mai ƙasa, yana kuma kiyaye ƙarfin da ya dace. Haɗin bayyananne, tauri da ƙarfin narkewa yana ba da damar amfani da shi don ƙera allura, ƙera busa da kuma fitar da bayanan martaba, bututu, fina-finai da faranti. 

Ana samun PETG a cikin nau'in da ba a gyara ba ko tare da ƙarin abubuwa daban-daban, gami da wakilai na saki, masterbatches da masu gyara tasirin, don ƙera allura. 

Ya kamata a busar da PETG a 120 ~ 160F na kimanin awanni 4 ~ 6 kafin a yi gyare-gyare ko a fitar da shi. A cikin dukkan hanyoyin guda biyu, zafin narkewar ya kama daga 420F zuwa 510F. Ya kamata lokacin riƙe matsi na kayan aikin sarrafawa a yanayin zafi mai girma ya zama kaɗan gwargwadon iko don hana lalacewa mai yawa. Ya kamata a yi ƙera allurar a kan injin allurar, wanda ke buƙatar kowace allurar ta kasance tsakanin kashi 50% zuwa 80% na ƙarfinta. Ana iya fitar da PETG a kuma hura shi a yanayin zafi tsakanin 400-450F don yin shamfu, sabulun wanke-wanke na ruwa, kayayyakin tsafta, man ma'adinai da kwalaben da aka yi amfani da su wajen shirya abinci. Kayan ya cika ƙa'idodin FDA kuma yana iya haɗuwa da abinci. Extrusion yana samar da nau'ikan bayanai iri-iri, da kuma bututu, fina-finai da zanen gado don marufi, gami da marufi na kayan aikin likita. Ana iya tsaftace PETG da PCTA da ethylene oxide da Y haskoki. Idan aka yi amfani da shi don yin allurar ƙera, yawanci ana sarrafa PETG a cikin zafin jiki na narkewa na 450-510F, kuma zafin mold ɗin yana kusan 70-130F. Aikace-aikacen yanzu sun haɗa da murfin kayan aiki, garkuwar injina, kwantena na kwalliya, na'urar nuna lever, abubuwan nuni, da kayan wasa. Ana amfani da PET galibi a cikin marufi na abubuwan sha masu laushi. PET ta mamaye kusan kashi 100% na kasuwar kwantena masu lita 2 waɗanda ba za a iya sake amfani da su ba, kuma an san kwalaben PET masu lita 1.5, lita 1, lita 0.5 da ƙananan su sosai. Ana amfani da PET a cikin abinci, ruwan inabi da sabulun wanki. Ana sa ran buƙatar PET za ta ci gaba da ƙaruwa a cikin abubuwan sha marasa iskar gas da kuma marufin kayayyakin masana'antu. Abincin da aka shirya sun haɗa da mustard, kayan gelatin, man gyada, dandano, man girki, hadaddiyar giya da ruwan 'ya'yan itace. Sabbin launuka, musamman Wieber PET a fannin magani. Bitamin da abubuwan tsaftacewa suna shahara a cikin marufi. Ɗaya daga cikin sabbin aikace-aikacen da suka fi saurin girma ga kwantena na PET shine marufi na abinci ko abin sha, wanda ke buƙatar cikewa a yanayin zafi mai yawa. Dole ne a sanya abinci da yawa, musamman 'ya'yan itatuwa ko abinci ko abin sha masu yawan 'ya'yan itace, a cikin akwati a zafin digiri 180 na Fahrenheit ko sama da haka. Wannan yana samar da man shafawa (rufewar ƙwayoyin cuta) na kayayyaki da kwantena a lokacin cikawa. Yawanci kwantena masu dacewa, kamar abubuwan sha masu laushi da jakunkunan marufi na abubuwan sha masu laushi, suna raguwa da canzawa lokacin da aka fuskanci yanayin zafi sama da 160T, wanda hakan ya faru ne saboda wani sassaucin damuwa. Yawan damuwa yana faruwa ne lokacin da aka miƙe akwati aka hura shi. An ƙirƙiro fasahar juriya ga zafi don inganta sarrafawa, wanda galibi ake kira fasahar "saita zafi". Dangane da takamaiman tsarin sarrafawa, akwai cikakkun bayanai na fasaha da yawa na sarrafawa, waɗanda aka yi musu lasisi sosai, bisa ga abin da za a iya samar da kwantena masu dacewa da turare a zafin 190 ~ 195F. Kayayyakin da ke buƙatar marufi tare da wannan siffa sun haɗa da ruwan 'ya'yan itace tsantsa. Abubuwan sha masu yawan ruwan 'ya'yan itace, shayi, wasu abubuwan sha masu ɗauke da sinadarin isotonic da wasanni, kayan ƙanshi, ruwan 'ya'yan itace da aka tattara da kuma wasu ruwan ma'adinai. Sauran amfani na ƙarshe ga PET ana amfani da su sosai a cikin murfin da aka fitar da su da kuma fina-finai da zanen gado da aka fitar. Ana amfani da PET a matsayin kayan shafa da aka fitar don marufi na kwali mai gasawa, kuma ana iya amfani da PET mai lu'ulu'u (CPET) a matsayin kayan tushe don yin faranti a cikin tanda. Fim ɗin PET yawanci ana amfani da shi ta hanyar biaxial kuma ana amfani da shi azaman X-ray da sauran fim ɗin daukar hoto, marufi na nama da cuku, tef ɗin maganadisu, rufin lantarki, faranti na bugawa da marufi na kwalba. Ana kuma amfani da PET a matsayin kayan tef na masana'antu. Fina-finan PET marasa tsari da kuma zane-zane marasa tsari sun fara faɗaɗa don samar da kwantena, faranti, kayayyakin da aka yi da kumfa da kofunan abin sha. Takaitawa: PETG sigar PET ce da aka inganta, tare da bayyananniyar hanya, ƙarfin aiki mai yawa, juriyar tasiri mafi kyau, kuma ba shakka, farashi mai girma.