Polyethylene terephthalate Cov tshuaj formula yog -OCH2-CH2OCOC6H4CO- English lub npe: polyethylene terephthalate, abbreviated li PET, yog ib tug siab polymer, muab los ntawm lub cev qhuav dej condensation cov tshuaj tiv thaiv ntawm ethylene terephthalate.Ethylene terephthalate yog tau los ntawm esterification cov tshuaj tiv thaiv ntawm terephthalic acid thiab ethylene glycol.PET yog cov mis nyuj dawb los yog lub teeb daj, crystalline polymer nrog ib tug du thiab ci ntsa iab.Nws muaj zoo heev lub cev thiab txhua yam khoom nyob rau hauv ib tug dav kub ntau yam.Kev siv lub sijhawm ntev tuaj yeem ncav cuag 120 ° C.Cov hluav taws xob rwb thaiv tsev zoo heev.Txawm hais tias qhov kub thiab txias ntau zaus, nws cov khoom siv hluav taws xob tseem zoo, tab sis kev tiv thaiv corona tsis zoo.Creep kuj, qaug zog tsis kam, kev sib txhuam tsis kam, thiab qhov ntev stability yog txhua yam zoo heev.
qhov zoo
1, nws muaj cov cuab yeej zoo, qhov cuam tshuam lub zog yog 3 ~ 5 npaug ntawm lwm cov yeeb yaj kiab, thiab folding kuj zoo.
2, resistant rau roj, roj, dilute acid, dilute alkali, thiab feem ntau cov kuab tshuaj.
3, nws muaj qhov zoo heev thiab kub tsis kam.Nws tuaj yeem siv rau lub sijhawm ntev ntawm qhov kub thiab txias ntawm 120 ℃, thiab tuaj yeem tiv taus qhov kub ntawm 150 ℃ thiab qis kub ntawm -70 ℃ nyob rau lub sijhawm luv luv, thiab cov khoom siv hluav taws xob ntawm qhov kub thiab txias tsis tshua muaj kev cuam tshuam.
4, roj thiab dej vapor permeability yog tsawg, uas yog, nws muaj cov roj zoo heev, dej, roj thiab ntxhiab tsw.
5, siab pob tshab, tuaj yeem thaiv ultraviolet rays, zoo gloss.
6, non-toxic, tasteless, zoo huv si thiab kev nyab xeeb, tuaj yeem siv ncaj qha rau kev ntim khoom noj.
PET yog lub mis dawb los yog lub teeb daj uas muaj crystalline polymer nrog lub ntsej muag du thiab ci.Zoo creep kuj, qaug zog tsis kam, kev sib txhuam tsis kam thiab qhov ntev stability, tsis tshua muaj puas thiab siab hardness, nrog rau qhov zoo tshaj plaws toughness ntawm cov ntaub ntawv thermoplastic: zoo hluav taws xob rwb thaiv tsev, tsis kub tsis kam, tab sis tsis zoo corona kuj.Kub, huab cua tsis kam, zoo tshuaj tiv thaiv stability, tsis tshua muaj dej nqus, tsis muaj zog acids thiab organic solvents, tab sis tsis immersed nyob rau hauv dej kub thiab alkali.PET resin muaj qhov kub hloov pauv iav, qeeb crystallization ceev, lub voj voog molding ntev, lub voj voog ntev molding, loj molding shrinkage, tsis zoo seem stability, brittleness ntawm siv lead ua molding, thiab tsis tshua muaj cua sov.Los ntawm kev txhim kho tus neeg sawv cev nucleating, tus neeg sawv cev crystallization thiab iav fiber reinforcement, PET muaj cov yam ntxwv hauv qab no ntxiv rau cov khoom ntawm PBT:
1, qhov kub distortion kub thiab siv mus sij hawm ntev yog qhov siab tshaj plaws ntawm cov khoom siv thermoplastic.
2, vim nws qhov kub tsis kam, PET reinforced yog immersed nyob rau hauv ib tug solder da dej ntawm 250 ° C rau 10 vib nas this, thiab yuav luag tsis hloov xim.Nws yog tshwj xeeb tshaj yog haum rau kev npaj ntawm soldered hluav taws xob thiab hluav taws xob qhov chaw.
3, lub zog dabtsi yog khoov yog 200Mpa, lub elastic modulus yog 4000Mpa, lub creep thiab qaug zog kuj kuj zoo heev, lub hardness saum npoo yog siab, thiab txhua yam khoom zoo ib yam li thermosetting plastics.
4, txij li thaum cov ethylene glycol siv nyob rau hauv zus tau tej cov PET yog yuav luag ib nrab ntawm cov nqi ntawm butylene glycol siv nyob rau hauv ntau lawm, PET resin thiab reinforced PET yog tus nqi qis tshaj ntawm engineering plastics thiab muaj tus nqi siab.