PETG yog amorphous copolyester. Hauv cov txheej txheem tsim khoom, qee qhov nyiaj ntawm ethylene glycol yog hloov los ntawm 1, 4-cyclohexane dimethano l (CHDM), uas tiv thaiv crystallization, yog li txhim kho kev tsim khoom thiab pob tshab. Nws cov khoom yog pob tshab, zoo heev cuam tshuam, tshwj xeeb tshaj yog tsim rau kev tsim cov phab ntsa tuab pob tshab, thiab tuaj yeem tsim nyob rau hauv txhua yam raws li tus tsim lub hom phiaj, nws tuaj yeem siv cov tsoos extrusion, txhaj tshuaj molding, tshuab molding thiab lwm txoj kev molding, thaum PETG cov khoom muaj kev ua tau zoo tom qab ua tiav, thiab tuaj yeem ua cov kev hloov kho machining. Nyob rau tib lub sijhawm, cov copolyester no tau dhau los ntawm cov khoom noj khoom haus sib cuag ntawm US FDA, yog li nws tuaj yeem siv rau hauv cov zaub mov, kev kho mob thiab kev noj qab haus huv.
(Kev sib piv ntawm cov yam ntxwv ntawm PETG nrog rau lwm cov khoom siv tshuaj)
Qhov zoo:
Nws yog thawj ntawm tag nrho cov khoom pob tshab, yog li ntau zaus cov hauv qab no yuav xaiv cov khoom pob tshab los sib piv.
① PETG Nws yog thawj zaug thiab qhov tseem ceeb ntawm cov yas pob tshab. Nws muaj cov khoom siv kho qhov muag zoo heev, siab gloss nto thiab tsis tshua muaj turbidity, thiab nws lub teeb xa tawm yog ze li ntawm 90%, uas yog ze rau acrylic (pmma) thiab zoo dua li lub teeb xa hluav taws xob ntawm polycarbonate (PC).
(Los ntawm sab laug mus rau sab xis yog cov khoom kos duab ntawm PETG, PMMA thiab PC)
② PETG muaj ntau yam tshuaj tiv thaiv (xws li kas fes, chocolate, roj, acids, thiab lwm yam). Nws muaj cov tshuaj tiv thaiv zoo heev rau cov tshuaj hauv qab no: roj tsheb, xab npum ua kua, xab npum, ntaub pua plag detergent, tshuaj txhuam hniav thiab peppermint roj, naj hoom, roj ua noj, 2-propanol, hydrocarbon solvents, thiab lwm yam.
③ PETG tshwj xeeb tshaj yog tsim rau kev tsim cov khoom pob tshab nrog cov phab ntsa tuab. PETG cov khoom nrog cov phab ntsa tuab kuj tseem tuaj yeem tswj tau qhov zoo sib xws ntawm lub teeb kis tau tus mob, thiab PETG cov khoom muaj pob tshab dej khov xiav tom qab uas ua tau raws li lub ntiaj teb sib txawv, thiab nws qhov chaw yog qhov muag heev, nrog rau qhov pom kev zoo. Tsis tas li ntawd, lawv cov phab ntsa tuab lossis cov khoom siv sab hauv tsis yooj yim los tsim npuas thaum ua.
④ Nws yog ib qho ntawm ob peb tus phooj ywg ib puag ncig cov ntaub ntawv yas kom deb li deb. Qhov laj thawj yog vim li cas nws yog ib puag ncig cov khoom siv yog vim nws tsuas yog CO2 thiab dej tom qab hlawv, uas tuaj yeem tiv thaiv qhov xwm txheej zoo. Txij li xyoo 2006, ntau lub teb chaws tsim kho xws li Europe, Tebchaws Asmeskas thiab Nyij Pooj tau txhawb nqa kev siv cov khoom zoo ib puag ncig zoo ib yam li PETG (PETG muaj SGS, FDA, MSDN ntawv pov thawj). PETG tau dhau los ua ib qho ntawm cov kev xaiv zoo tshaj plaws rau cov ntaub ntawv uas tsis yog-ib puag ncig zoo nkauj xws li PVC.
⑤ PETG muaj qhov toughness siab heev, zoo heev tensile kuj thiab zoo cuam tshuam tsis kam. Hauv cov yas pob tshab, qhov toughness thiab kev cuam tshuam ntawm PC yog qhov zoo heev, tab sis cov cuab yeej tensile tsis zoo; Cov khoom tensile, toughness thiab cuam tshuam tsis zoo ntawm acrylic yog tsis zoo; PETG muaj qhov tawv tawv heev thiab zoo heev tensile zog, thiab nws qhov siab tshaj plaws tensile piv tuaj yeem ncav cuag ntau dua 180%. Nws lub zog cuam tshuam yog ntau zaus ntawm acrylic, tab sis me ntsis phem dua li PC. Lub caij no, PETG yog ib qho ntawm cov yas uas nws lub zog cuam tshuam yog ze rau PC's ntawm ntau hom pob tshab yas. PETG muaj lub koob npe nrov ntawm "tsis tawg", uas yog muab los ntawm nws super toughness.
Super toughness zoo heev txo qhov kev tawg ntawm cov khoom tiav thaum lub sij hawm ua haujlwm thib ob, kev thauj mus los, kev teeb tsa thiab siv, thiab txo cov nqi tag nrho ntawm cov khoom tiav. Lwm qhov zoo dua ntawm PETG yog tias nws lub cev thiab cov khoom siv kho tshuab tsis tshua hloov ntawm qhov kub thiab txias.
⑥ Lawv muaj kev nthuav qhia theem nrab ua haujlwm. Cov ductility zoo heev ua rau muaj ntau yam kev ua haujlwm thib ob rau PETG. Koj tuaj yeem laser txiav, ntug milling, tuag txiav, drilling, vuam, xuas nrig ntaus, kub dabtsi yog khoov, txias dabtsi yog khoov (txog 2.5 hli), ntsia hlau / rivet / bolt txuas lossis kho lawv cov khoom. Kev ua haujlwm thib ob ntawm PC tsis zoo, vim tias PC yooj yim dua los tsim kev ntxhov siab thaum tsim, ib zaug ib qho ntawm cov txheej txheem ua haujlwm thib ob saum toj no, nws yuav rhuav tshem cov kev ntxhov siab ntawm cov khoom PC, lossis ua rau cov khoom tawg.
⑦ Lawv muaj zoo heev printing thiab txheej zog. Uas yog hais tias, PETG cov khoom yas tuaj yeem luam tawm (txhaj tshuaj, tshuaj ntsuam luam ntawv, pad luam ntawv, kub stamping, thiab lwm yam) lossis txau yam tsis muaj kev kho mob tshwj xeeb, thiab daim ntawv cog lus nrog cov txheej txheej yog zoo heev (Ceeb toom: PETG muaj ntau yam tshuaj tiv thaiv, tab sis nws tsis tau lees tias tiv thaiv tag nrho cov kuab tshuaj hauv cov tshuaj tsuag, thov kho PETG haum tshuaj ua ntej).
⑧ Lawv muaj cov khoom sib txuas zoo heev. Muaj peev xwm muaj ntau yam kev sib koom ua ke: xws li cov kuab tshuaj, cov nplaum dav dav, kev sib txhuam kev sib txuas, kev sib txuas siab, kev sib txuas ultrasonic, kev sib txuas ua ke (xws li cov ntsia hlau, rivets).
⑨ PETG muaj qhov kub thiab txias tsis kam. Lawv tuaj yeem siv tau ib txwm nyob ntawm -30 degree C, thiab qhov ntsuas kub qis tshaj plaws tuaj yeem ncav cuag -60 degree C, yog li nws cov khoom tsim nyog rau qee thaj chaw txias (xws li Russia, Canada, thiab lwm yam. .), thiab nws lwm yam ntxwv tseem zoo heev ntawm qhov kub thiab txias.
⑩ Lawv muaj kev txhaj tshuaj molding zoo. PETG kev txhaj tshuaj molding txheej txheem yog qhov ruaj khov, tsis tas yuav muaj lub tshuab txhaj tshuaj tshwj xeeb, nws qhov kev txhaj tshuaj molding kub tsuas yog li 215 degree C ~ 235 degree C, thiab PC txhaj tshuaj molding txheej txheem tsis yooj yim los tswj, txhaj tshuaj molding kub txog 280 degree. C, piv txwv li, lawv tuaj yeem txuag hluav taws xob zoo dua.
PETG tsis ua rau muaj kev ntxhov siab sab hauv thaum txhaj tshuaj molding, uas yog txiav txim los ntawm lawv cov qauv molecular thiab nws cov ductility zoo heev. Lub PC yooj yim dua los tsim kev ntxhov siab sab hauv, thiab ntau dua ib qho kev ua haujlwm tom qab tshem tawm kev ntxhov siab sab hauv. Kev ntxhov siab sab hauv ntawm cov khoom txhaj tshuaj molded yog qhov teeb meem heev, thiab qhov xwm txheej loj yog kev ntxhov siab tawg.
Qhov tsis zoo:
1) Lub thermal deformation kub tsawg dhau, tsuas yog 75 degrees, uas yuav ua rau muaj kev hloov pauv ntau
2) Kev ziab yog teeb meem ntau dua, nyuaj dua kom qhuav.
