Polyethylene terephthalate yog qhov tseem ceeb tshaj plaws hauv cov thermoplastic polyester, lus Askiv lub npe yog Polyethylene terephthalate, abbreviated li PET lossis PEIT (tom qab no hu ua PET), feem ntau hu ua polyester resin. Cov molar loj ntawm chav tsev rov qab yog 192 g / mol. Nws yog polycondensate ntawm terephthalic acid thiab ethylene glycol, thiab ua ke nrog PBT, nws yog sau ua ke hu ua thermoplastic polyester, los yog saturated polyester. Xyoo 1946, Tebchaws Askiv tau tshaj tawm thawj patent rau kev npaj PET. Xyoo 1949, British ICI formula ua tiav qhov kev sim, tab sis tom qab lub tuam txhab DuPont ntawm Tebchaws Meskas tau yuav daim ntawv pov thawj, cov cuab yeej tsim khoom tau tsim nyob rau xyoo 1953, uas yog thawj qhov kev tsim khoom hauv ntiaj teb. Thaum ntxov, PET yuav luag siv rau cov khoom siv hluavtaws (feem ntau hu ua polyester hauv kuv lub tebchaws, uas yog qhov zoo heev). Txij li thaum xyoo 1980s, PET tau ua tiav los ntawm kev tsim cov yas yas, thiab cov neeg ua haujlwm nucleating thiab crystallization accelerators tau tsim ua ntu zus. PET thiab PBT, ua ke ua cov thermoplastic polyesters, tau dhau los ua ib qho ntawm tsib qhov loj engineering yas.
PET is divided into fiber-grade polyester chips and non-fiber-grade polyester chips. ① Fiber-grade polyester is used to manufacture polyester staple fibers and polyester filaments, and is the raw material for polyester fiber enterprises to process fibers and related products. Polyester is the most productive variety of chemical fibers. ②Non-fiber polyester is also used for bottles, films, etc., and is widely used in the packaging industry, electronic appliances, medical and health, construction, automobiles and other fields. Among them, packaging is the largest non-fiber application market for polyester, and it is also the fastest growing PET market. fast field.
Qhov zoo ntawm PET ua cov khoom ntim:
1. Nws muaj cov khoom siv zoo, qhov cuam tshuam lub zog yog 3 mus rau 5 npaug ntawm lwm cov yeeb yaj kiab, thiab folding kuj yog qhov zoo.
2. Roj kuj, roj tsis kam, dilute acid, dilute alkali, thiab cov kuab tshuaj feem ntau.
3. Nws muaj qhov kub thiab txias tsis zoo, tuaj yeem siv tau ntev hauv qhov kub thiab txias ntawm 120 degree, tuaj yeem tiv taus qhov kub ntawm 150 degree hauv luv luv- siv sijhawm, thiab tuaj yeem tiv taus qhov kub ntawm - 70 degree, thiab muaj kev cuam tshuam me ntsis rau nws cov khoom siv kho tshuab ntawm qhov kub thiab txias.
4. Lub permeability ntawm cov pa roj thiab dej vapor yog tsawg, thiab nws muaj zoo heev gas barrier, dej, roj thiab tsw zog.
5. High transparency, tuaj yeem thaiv cov kab hluav taws xob ultraviolet, thiab muaj gloss zoo.
6. Tsis yog - tshuaj lom, tsis qab, kev nyiam huv thiab kev nyab xeeb, tuaj yeem siv ncaj qha rau ntim khoom noj.