Ukhuseleko
Ukutya-ibakala le-PET lisetyenziswa kakhulu ekupakishweni kokutya nesiselo ngenxa yokhuseleko oluvunyiweyo kunye nokuzinza. Ayizikhuphi izinto eziyingozi kwaye ihlangabezana nemigangatho yokhuseleko lokutya yamazwe ngamazwe, enika abathengi uxolo lwengqondo xa beyisebenzisa. Nangona kunjalo, kubalulekile ukuqaphela ukuba i-PET inokukhupha izinto ezinobungozi, ezifana ne-DEHP, kumaqondo aphezulu. Ngoko ke, xa usebenzisa izikhongozeli zePET, kubalulekile ukunqanda{4}}ubushushu obuphezulu ukunqanda ukukhutshwa kwezinto eziyingozi.
Ukutya-ibakala lePP likho kuyo yonke indawo kubomi bemihla ngemihla, obufana nevenkile yokugcina ukutya kunye neebhokisi ezikhuselekileyo zesidlo sasemini kwi-microwave{1}}. Kutheni ithandwa kangaka nje? Okokuqala, le mathiriyeli ayiyo{3}}yityhefu, ayinavumba, kwaye ayinancasa, iyenza ikhuseleke kakhulu ukuyisebenzisa. Ngaphaya koko, inokumelana nobushushu obugqwesileyo; ingenziwa kwi-microwave ngaphandle kweengxaki, ngokungafaniyo nezinye iiplastiki ezikhubaza okanye zikhuphe izinto ezinobungozi xa zishushu. Ngaphezu koko, inozinzo olugqwesileyo lweekhemikhali kwaye ayisebenzi ngokulula kunye nezinye izinto phantsi kokusetyenziswa okuqhelekileyo.
Okubaluleke ngakumbi, izinto zePP azifuni ukongezwa kwayo nayiphi na into enobungozi ngexesha lenkqubo yokuvelisa. Ngaphantsi kweemeko eziphezulu zokushisa, ayiyi kubola kwi-bisphenol A, ikhemikhali eyingozi kumzimba womntu. Oku kuthetha ukuba itafile okanye ukupakishwa okwenziwe ngezinto zePP zikhuselekile kwaye zifaneleke ngakumbi ukugcina ukutya.
ukungafihli
Ukutya-ibakala le-PET imathiriyeli inokungafihli okuphezulu kakhulu, okukuvumela ukuba ubone ukutya ngaphakathi ngokukrwaqula, inkangeleko yako kunye nomgangatho oboniswe ngokucacileyo. Ngoko ke, ifaneleke ngokukodwa ukusetyenziswa kwipakethe efuna ukubonisa ukutya, okufana neebhotile zesiselo esihlala sizisela, kunye neengqayi zokutya ezigcina iibhiskithi kunye neelekese. Uninzi lwezi phakheji zenziwe nge-PET. Kutheni uyisebenzisa? Kuba amashishini afuna ukubonisa eyona miba ilungileyo yeemveliso zabo kubathengi ukuze babatsalele ukuba bathenge. Ngaphezu koko, le phakheji ayibonakali icocekile kwaye icocekile kuphela, kodwa inokukhusela ukutya ukuya kuthi ga kwinqanaba elithile, ithintele ukuba ifume okanye ikhubazeke, kwaye iqinisekise ukuba ukutya kunokufikelela kubathengi kwaye kukwimeko entle.
Ukutya-ibakala lePP kunokufihlwa okusezantsi, okuqhelekile ukuba kungafihli-. Ngaphandle kokuhanjiswa kokukhanya okusezantsi, usetyenziso lwayo lubanzi-noluhlu. Thatha izikhongozeli zeyogathi njengomzekelo. Isiqingatha -sezinto ezibonakalayo zePP zivumela abantu ukuba babone ngokucacileyo ukutyeba kweyogathi, ngelixa begcina imveliso ingaqondakali. Enye into eqhelekileyo yevenkile enkulu yitreyi, kunye neetreyi zenyama entsha ngumzekelo obalaseleyo. Zenziwe ngemathiriyeli yePP, ezi treyi zihlala ixesha elide, ziyasebenza, kwaye isemi{9}yazo e transparent texture izenza zibukeke zicocekile kwaye zicocekile. Ukusebenzisa iPP kwizikhongozeli zokutya kunye neetreyi azihlanganisi nje kuphela ezi mfuno kodwa ziqinisekisa nokhuseleko lokutya.
Ukumelana nobushushu
Ukuxhathisa ubushushu bokutya-ibakala lePET luphawu oluphambili. Nangona ikwazi ukumelana nobushushu-, ayikwazi ukumelana namaqondo obushushu aphezulu. Xa iqondo lobushushu lifikelela kuma-70-80 idigri, umphezulu wokupakishwa kwe-PET uya konakala kwaye ulahlekelwe yimo yawo yangaphambili. Ke ngoko, ukutya -ibakala le-PET akufanelanga usetyenziso olufuna ukuvalwa kobushushu obuphezulu okanye ukufudumeza. Ukuba amanzi ashushu afakwe kwi-PET yokupakisha, iya kukhubaza ngokulula, ekhokelela kumonakalo wokupakisha okanye unikeze ukupakishwa okungasebenzisekiyo. Ngoko ke, xa ukhetha izinto zokupakisha, iimfuno zeqondo lokushisa ngexesha lokulungiswa kokutya kufuneka ziqwalaselwe ngokupheleleyo ukuphepha iingxaki ezibangelwa yizinto zokupakisha ezingenakumelana nokushisa.
Ukutya-ibakala lePP kunokumelana nobushushu obubalaseleyo, ngokuqhelekileyo bunyamezela amaqondo obushushu phakathi kwe110-120℃. Ikwayiplastiki kuphela enokuthi ifudunyezwe ngokuthe ngqo kwi-oveni ye-microwave, iyenza isebenze ngakumbi. Ukuba ukutya kufuneka kufakwe inzala kumaqondo obushushu aphezulu okanye kutshiswe ngaphambi kokupakishwa, imathiriyeli yokupakisha yePP igqibelele. Izikhongozeli ezininzi zokugcina ukutya, ezinjengezo sidla ngokuzisebenzisa ukugcina izidlo, kwaye iibhokisi ezilungele ukutyiwa kwiivenkile ezinkulu, zenziwe ngezinto zePP. Ikulungele kwaye ikhuselekile ukuyisebenzisa ukutshisa ukutya kwi-microwave, ngaphandle kokukhathazeka malunga nokunyibilika okanye ukukhupha izinto ezinobungozi. Iluncedo kakhulu kubomi bemihla ngemihla.
Ukumelana nemichiza
Ukutya-ibakala le-PET linonyamezelo olululo kwiiasidi kunye neealkali kwaye luyakwazi ukumelana neendawo ezineasidi kunye nealkaline ekutyeni kwemihla ngemihla. Nangona kunjalo, ayizukusebenza ukuba idibana neearhente ezinamandla ze-oxidizing okanye izinyibilikisi zendalo. Umzekelo, ii-oxidizing agents ezomeleleyo ezifana nebleach kunye ne-disinfectants, kunye ne-peint thinners, zinokuyonakalisa i-PET, ziyenze ibe brittle, ikhubazeke, okanye yophuke. Ngoko ke, xa upakisha ukutya, kungcono ukunqanda ukukuvumela ukuba kudibane nezi zinto ukuqinisekisa ukuthembeka kokupakishwa kunye nokhuseleko lokutya.
Ukutya-ibakala le-PP linozinzo olululo lwekhemikhali kwaye alusebenzi kunye neekhemikhali ezininzi ngaphandle kwee-agent ezomeleleyo ze-oxidizing. Esi sixhobo sithandwa kumacandelo okutya kunye namashishini. Kwimigqomo yokugcina ukutya kunye ne-microwave{3}}iibhokisi zesidlo sasemini ezikhuselekileyo, imathiriyeli yePP ifanelekile kakhulu kuba ithintela ukutya ekungcolisweni yimichiza. Kwipakethe ethile yeekhemikhali zemizi-mveliso, ukuba i-asidi okanye i-alkalinity ayomelele kakhulu, imathiriyeli yePP nayo inokumelana nayo. Nokuba izimonyo kunye nokupakishwa kwemveliso yokucoca kunokuzuza kwiPP, ukuthintela ukuphendula phakathi kweekhemikhali zangaphakathi kunye nezinto zokupakisha, ukuqinisekisa ukuzinza komgangatho wemveliso. Ngamafutshane, nje ukuba ingadibanisi neearhente ezinamandla ze-oxidizing, izinto zePP lukhetho oluhle lokupakisha oluchasa ukubola kweekhemikhali.
Ukuqhubekekisa ukusebenza
Ukutya-ibakala lePET kuyasokolisa ukusetyenzwa. Kufuneka yomiswe kakuhle phambi kokuba ibunjwe. Ukuba ayomile ngokupheleleyo, iziphene zinokuvela ngokulula ngexesha lokusetyenzwa, njengokudumba okanye ukungcola kumphezulu wemveliso. Ngaphezu koko, kunzima ukusetyenzwa nge-PET, yaye izinto ezifunekayo kwisixhobo neenkqubo zokwenziwa kwemveliso zingqongqo. Oku kukhokelela ngokuthe ngqo kwiindleko eziphezulu zokuvelisa kunezinye izinto zeplastiki. Ke ngoko, iimveliso zePET zihlala zibiza kakhulu. Nangona kunjalo, isasetyenziswa ngokubanzi ukupakishwa okunje ngeebhotile zesiselo kunye nezitya zokugcina ukutya, ikakhulu ngenxa yokusebenza kwayo kakuhle, ukucaca okuphezulu, ukukwazi ukubonisa ukutya ngokucacileyo, kunye nokukwazi ukuqinisekisa ukhuseleko lokutya.
Ukutya-ibakala lePP kunokusebenza okugqwesileyo, ukuziqhelanisa ngokulula neendlela ezahlukeneyo zokusetyenzwa, ezifana nokubumba inaliti, i-extrusion, kunye nokubumba ukuvuthela. Kwimveliso, i-PP ayifuni umgangatho ofanayo wezixhobo kunye neenkqubo njengezinye iiplastiki, kwaye ukubumba kulula. Ngoko ke, iindleko zayo zokuvelisa ziphantsi. Ngenxa yoko, ukutya-ibakala lePP lithandwa kakhulu kushishino lokupakisha; izinto ezininzi zemihla ngemihla ezifana nezitya zokugcina ukutya kunye neekomityi zeyogathi zenziwe ngePP. Ngexabiso eliphantsi kunye nomgangatho olungileyo, inokuhlangabezana nemfuno yentengiso, ngoko ayimangalisi into yokuba inendawo kwishishini lokupakisha ukutya.
Iimeko eziSebenzayo
Ukutya-ibakala le-PET lifaneleke ngakumbi kwipakethe efuna ukubonisa inkangeleko yokutya kodwa ayifuni amaqondo obushushu aphezulu. Ukucaca kwayo okuphezulu kuvumela umbono ocacileyo wenkangeleko yokutya kunye nomgangatho, okwenza kube yinto efanelekileyo yokupakisha njengeebhotile zesiselo kunye neengqayi zokutya ezicacileyo apho abathengi kufuneka babone iziqulatho ngqo. Nangona kunjalo, ukusebenza kwayo kumaqondo aphezulu okushisa akufanelekile; umphezulu ngokuqhelekileyo ukhubaza kwi-70-80℃, iyenza ingafaneleki kwiziselo ezishushu kunye nokutya. I-PET ayifanelekanga ukuba ukucocwa kobushushu obuphezulu okanye ukufudumeza kuyafuneka.
Ukutya-ibakala le-PP sisixhobo esisebenzayo, ngakumbi esilungele ukupakishwa ekufuneka sixhathise ukhukuliseko lwekhemikhali kwaye sisetyenziselwa ukutya okunomkhenkce. Umzekelo, uninzi lweebhokisi zokutya, iitreyi, kunye ne-microwave{2}}izikhongozeli ezikhuselekileyo esiqhele ukuzibona zenziwe ngezinto zePP. I-PP inozinzo oluhle kakhulu lweekhemikhali; ayisebenzi kunye neekhemikhali ezininzi ngaphandle kwee-oxidizers ezomeleleyo, ziyenza ikhuseleke ngakumbi kugcino lokutya. Ngaphaya koko, iPP ixhathisa amaqondo obushushu aphantsi, ke ukutya okukhenkcezisiweyo kunokugcinwa ngaphandle kokukhutshwa, ngokungafaniyo nezinye izinto ezinokuthi zibe brittle okanye zikhubazeke. Ukufudumeza, izitya zePP zinokufakwa ngokuthe ngqo kwi-microwave, zibonelela ngokulula kunye nesantya.
Ukhuseleko lokusingqongileyo
Ngelixa ukutya-ibakala le-PET liqhayisa ngokusebenza kokusingqongileyo okugqwesileyo, ezinye izongezo, ezinje nge-catalysts kunye ne-antioxidants, zingongezwa ngexesha lokusetyenzwa. Ezi zongezo zinokufuduka kwaye ziphume ngexesha{2}}zokusetyenziswa kwexesha elide, nto leyo echaphazela ukhuseleko lokutya. Ngokomzekelo, i-catalysts esetyenziswe kwi-PET polycondensation reaction (efana ne-antimony trioxide) kunye ne-byproducts ye-reaction (efana ne-acetaldehyde) inetyhefu, ibeka umngcipheko wokudluliselwa kwe-toxicity. Ke ngoko, xa ukhetha i-PET njengento yokupakisha ukutya, kuyimfuneko ukulawula ngokuthe ngqo inani lezongezo ezisetyenzisiweyo kunye nemida yokufuduka ukuze kuqinisekiswe ukuthotyelwa kwemigangatho yokhuseleko lokutya.
Ukutya-ibakala lePP linokusebenza okubalaseleyo kokusingqongileyo kwaye akukhuphi iigesi eziyingozi ngexesha lokusetyenziswa, ngoko kunempembelelo encinci kwimpilo yabantu. Yimathiriyeli yeplastiki ekhuselekileyo, kwaye ifaneleke ngokukodwa ukupakishwa kokutya. Umzekelo, uninzi lwezikhongozeli zokutya kunye ne-microwave-iibhokisi ezikhuselekileyo zesidlo sasemini esiqhele ukuzisebenzisa zenziwe ngezinto zePP. Xa uyisebenzisela ukugcina ukutya, nokuba ufaka efrijini okanye ukufudumeza, akuyomfuneko ukuba uzikhathaze ngokukhupha izinto eziyingozi. Ngaphezu koko, imathiriyeli yePP kulula ukuyilahla emva kokulahlwa, kwaye ayibeki mthwalo onzima kwindalo esingqongileyo njengezinye iiplastiki. Ke ngoko, iPP isetyenziswa kakhulu ekupakishweni kokutya kunye neemfuno zemihla ngemihla, kwaye abantu baziva beqinisekisiwe ngokusetyenziswa kwayo.
isiphelo
Ukuba ufuna ukubonisa inkangeleko kunye nomgangatho wokutya ngelixa umelana namaqondo obushushu aphezulu, ukutya -ibakala le-PET kusenokungafaneleki, njengoko i-PET ithanda ukuguquka kumaqondo obushushu aphezulu. Kuyacetyiswa ukuba ukhethe ezinye iimathiriyeli ezifanelene ngcono-nemimandla yobushushu obuphezulu. Nangona kunjalo, i-PET inokukhanya okuphezulu, okukhokelela kumgangatho obalaseleyo wokubonisa.
Ukuba ufuna ukuxhathisa ukubola kweekhemikhali kunye nokutya okukhenkcezisiweyo, ukutya -ibakala lePP lukhetho olulungileyo. I-PP inozinzo olululo lwekhemikhali, -ukumelana nobushushu obuphantsi, kwaye ingasetyenziselwa ukufudumeza i-microwave, iyenza isebenze kakhulu.
Ukutya -ibakala le-PET kunye ne-PP nganye ineempawu zayo: I-PET inokukhanya okuphezulu kodwa ukumelana nobushushu obulinganiselweyo; I-PP inokumelana nobushushu obuhle kunye nokuzinza kweekhemikhali, kodwa ukukhanya okuphantsi kancinci. Ngoko ke, ukhetho kufuneka lusekelwe kwimeko ethile yesicelo kunye neemfuno zokukhetha izinto ezifanelekileyo kakhulu.
