I-Polyethylene terephthalate I-chemical formula -OCH2-CH2OC6H4CO- Igama lesiNgesi: i-polyethylene terephthalate, efinyeziweyo njenge-PET, i-polymer ephezulu, ephuma kwi-reaction condensation ye-dehydration ye-ethylene terephthalate.I-ethylene terephthalate ifunyenwe ngokuphendula kwe-esterification ye-terephthalic acid kunye ne-ethylene glycol.I-PET lubisi olumhlophe okanye olutyheli olukhanyayo, ipholima ekhazimle kakhulu enomgangatho ogudileyo nobengezelayo.Ineempawu ezibalaseleyo zomzimba kunye noomatshini kuluhlu olubanzi lobushushu.Ubushushu bokusetyenziswa kwexesha elide bunokufikelela kwi-120°C.Ukugquma kombane kuhle kakhulu.Nokuba kubushushu obuphezulu kunye nobushushu obuphezulu, iipropathi zayo zombane ziselungile, kodwa ukuxhathisa kwe-corona kubi.Ukuxhathisa ukukhwela, ukuxhathisa ukudinwa, ukuxhathisa ukukhuhlana, kunye nozinzo lwe-dimensional zonke zilungile kakhulu.
inzuzo
I-1, ineempawu ezilungileyo zoomatshini, amandla empembelelo aphindwe ka-3 ~ 5 kwezinye iifilimu, kwaye ukuxhathisa ukusonga kulungile.
2, ukumelana ne-oyile, amafutha, i-asidi edibeneyo, i-alkali ye-dilute, kunye nezinyibilikisi ezininzi.
3, inokumelana okuphezulu kunye nobushushu obuphantsi.Ingasetyenziselwa ixesha elide kuluhlu lobushushu be-120 ℃, kwaye inokumelana nobushushu obuphezulu be-150 ℃ kunye nobushushu obuphantsi be--70 ℃ ekusebenziseni ixesha elifutshane, kunye neempawu zomatshini zokushisa okuphezulu kunye nezantsi zinefuthe elincinci.
I-4, i-gas kunye ne-vapor vapor permeability iphantsi, oko kukuthi, ine-gas egqwesileyo, amanzi, i-oyile kunye nokumelana nokuvumba.
I-5, ukukhanya okuphezulu, kunokuthintela imisebe ye-ultraviolet, i-gloss enhle.
I-6, i-non-toxic, incasa, ukucoceka okulungileyo kunye nokhuseleko, ingasetyenziselwa ngokuthe ngqo ukupakishwa kokutya.
I-PET yipolima emhlophe enobisi okanye etyheli ekhanyayo eqaqambe kakhulu enomgangatho ogudileyo nobengezelayo.Ukuxhathisa okulungileyo kokuchwechwela, ukumelana nokudinwa, ukuxhathisa ukungqubana kunye nokuzinza komda, i-abrasion ephantsi kunye nobunzima obuphezulu, ngokuqina okukhulu phakathi kwezixhobo ze-thermoplastic: ukufakwa kakuhle kombane, ifuthe eliphantsi lobushushu, kodwa ukunganyangeki kwe-corona.Iqondo lobushushu, ukumelana nemozulu, ukuzinza okuhle kokumelana neekhemikhali, ukufunxwa kwamanzi aphantsi, ukuxhathisa kwi-acids ebuthathaka kunye ne-solvents ye-organic, kodwa ingacwiliselwa emanzini ashushu kunye ne-alkali.I-resin ye-PET inobushushu obuphezulu beglasi yokutshintsha, isantya esicothayo secrystallization, umjikelo omde wokubumba, umjikelo omde wokubumba, ukushwabana okukhulu kokubumba, ukuzinza okungalunganga komgangatho, ukubunjwa kwekristale, kunye nokumelana nobushushu obuphantsi.Ngokuphuculwa kwe-agent ye-nucleating, i-agent ye-crystallization kunye ne-glass fiber reinforcement, i-PET inezi mpawu zilandelayo ukongeza kwiipropati ze-PBT:
I-1, iqondo lokushisa lokutshintsha ubushushu kunye nobushushu bokusebenzisa ixesha elide lelona liphezulu phakathi kwezixhobo zenjongo jikelele ye-thermoplastic.
I-2, ngenxa yokumelana nokushisa okuphezulu, i-PET eyomeleziweyo ibhaptizwa kwindawo yokuhlamba i-solder kwi-250 ° C imizuzwana eyi-10, kwaye phantse ayitshintshi umbala.Ilungele ngokukodwa ukulungiswa kwezinto ezithengiswayo ze-elektroniki kunye nombane.
I-3, amandla okugoba yi-200Mpa, i-elastic modulus yi-4000Mpa, ukunyathela kunye nokumelana nokudinwa kulunge kakhulu, ukuqina komphezulu kuphezulu, kwaye iimpawu zomatshini zifana neeplastiki ze-thermosetting.
I-4, ekubeni i-ethylene glycol esetyenziselwa ukuveliswa kwe-PET iphantse isiqingatha sexabiso le-butylene glycol esetyenziswe kwimveliso, i-PET resin kunye ne-PET eqinisiweyo yixabiso eliphantsi kakhulu phakathi kweeplastiki zobunjineli kwaye zinexabiso eliphezulu lokusebenza.