PET yog cov ntawv luv ntawm Polyethylene Terephthalate, abbreviated li PET lossis PETP. Suav txhais tau tias: polyterephthalic acid plastics, feem ntau suav nrog polyethylene terephthalate PET thiab polybutylene terephthalate PBT. Polyethylene terephthalate kuj feem ntau hu ua polyester resin, feem ntau hu ua polyester resin. Nws yog ib qho condensation ntawm terephthalic acid thiab ethylene glycol, sib sau ua ke hu ua thermoplastic polyester, los yog saturated polyester ua ke nrog PBT;
PI Suav feem ntau hu ua polyimide, yog ib qho tshuaj tsw qab heterocyclic polymer compound uas muaj imide txuas hauv cov qauv molecular, English npe Polyimide (hu ua PI), tuaj yeem muab faib ua benzene hom Pi, soluble PI, polyamide-imide (PAI) thiab polyetherimide ( PEI) plaub pawg.
Qhov sib txawv ntawm PET thiab PI tuaj yeem muab faib ua ob qhov chaw hauv qab no:
Ua ntej, los ntawm cov khoom siv sab nraud: PET hluav taws xob cua sov zaj duab xis yog pob tshab hluav taws xob cua sov zaj duab xis, thaum PI hluav taws xob cua sov zaj duab xis belongs rau opaque hluav taws xob cua sov zaj duab xis;
Qhov thib ob, qhov sib txawv ntawm qhov kub thiab txias: PET yog cov cua kub cua kub cua sov zaj duab xis, uas tuaj yeem tiv taus qhov kub thiab txias tau ntev, thiab qhov kub siab tshaj plaws ntawm PET hluav taws xob cua sov zaj duab xis tuaj yeem ncav cuag 80 degree, tab sis vim muaj kev nyab xeeb, hluav taws xob. Cov cua sov zaj duab xis nyob rau lub sijhawm no yuav tsum tau nruab nrog lub ntsuas cua sov, thiab cov cua kub cua sov ntawm PET hluav taws xob cua sov zaj duab xis feem ntau yog 50 ± 5 degree; pi zaj duab xis yog ib tug high-temperature hluav taws xob cua sov zaj duab xis, uas tuaj yeem tiv taus qhov kub ntawm 250 degree ntev, tab sis vim muaj kev nyab xeeb, qhov kub thiab txias ntawm pi hluav taws xob cua sov zaj duab xis yog teem rau 120 ± 5 degree.
