PET luv luv rau polyethylene terephthalate (lub npe tshuaj rau polyester). PET yas yog cov yas ntshiab, muaj zog, thiab lub teeb yuag nrog ntau yam khoom siv hauv tsev thiab kev lag luam. PET yas yog ib qho ntawm cov yas siv ntau tshaj plaws thiab nws tseem yog cov yas siv dua tshiab.
PET Yas|Kev Taw Qhia
Ua ntej peb sib tham txog qhov ins thiab outs ntawm PET yas, tej zaum koj yuav xav tsis thoob tias PET yas sawv cev rau. PET yas yog dab tsi? PET luv luv rau nws lub npe tshuaj: polyethylene terephthalate.
PET feem ntau hu ua PETE, PETG, APET, PETP lossis PET-P. Ib yam li cov ntaub so ntswg feem ntau hu ua "Kleenex", PET yas tuaj yeem raug xa mus rau nws lub npe Dacron (US), Terylene (UK), lossis Lavsan (Russia).
PET muaj ntau yam khoom uas ua rau nws xav tau rau ntau yam kev siv. Nyob rau hauv tsos, PET yog ntshiab thiab pob tshab. Nws yog me ntsis yoog raws, tab sis tseem muaj zog thiab yuav tsis tsim kua muag yooj yim. Nws yog lub teeb yuag thiab tuaj yeem yooj yim zoo li thaum molten.
Kev siv PET
Koj lub tsev yuav luag muaj ntau yam khoom ua los ntawm PET. Nws nquag siv rau lub raj mis dej, ntim tshuaj zawv plaub hau, lub raj mis dej qab zib, thiab khob yas. Ntau cov khoom siv ntaub kuj siv PET hauv daim ntawv ntawm polyester.
Cov ntawv thov ntxiv rau PET suav nrog:
Microwavable ntim khoom
Zaub xam lav ntim ntim
Peanut butter & condiment ntim
Vitamin ntim
Lamination ntawm solar panels
Automotive wiper caj npab
Automotive cav npog
Automotive headlamp retainers
Puas yog PET Plastic Recyclable?
Yog lawm! PET yog 100% recyclable. Qhov tseeb, PET yas yog cov yas siv dua tshiab tshaj plaws hauv ntiaj teb. PET yas tau txais dav dav rau kev rov ua dua tshiab, vim tias nws tuaj yeem ntxuav tau yooj yim thiab yaj rau kev siv hauv cov khoom qis, lossis hydrolyzed mus rau monomers, uas yog purified thiab rov ua dua polymerized los ua cov khoom noj tshiab-qib PET. Daim vis dis aus hauv qab no qhia lwm txoj hauv kev los siv PET, los ntawm kev tig nws cov khaub ncaws polyester.
Raws li xyoo 2017, kwv yees li 29.2 feem pua ntawm PET yas rov ua dua hauv Tebchaws Meskas. Yog tias koj tab tom nrhiav kom rov ua dua koj tus kheej cov khoom yas PET, koj tuaj yeem txheeb xyuas cov khoom siv PET los ntawm kev nrhiav tus lej 1 hauv cov xub txuas ntxiv.
Thaum rov siv dua yog txoj kev nyiam ntawm PET pov tseg, nws muaj kev nyab xeeb rau kev pov tseg. Nws yuav tsis biodegrade ntawm nws tus kheej yog li nws yuav tsis kis kab mob nyob ib puag ncig, txawm hais tias cov kws tshawb fawb Nyij Pooj tau tshawb pom ib hom kab mob uas tuaj yeem ua rau PET yas sai sai.
Keeb kwm luv luv ntawm PET yas
Calico Printers Association pib tsim PET hauv lawv lub tebchaws United Kingdom labs. Nws tau npaj thawj zaug hauv xyoo 1940 thaum kawm txog phthalic acid. Lawv tau txais patent rau lawv cov kev siv zog hauv xyoo 1941.
Thawj North American siv PET yog nyob rau hauv nruab nrab xyoo 1940 los ntawm ib pawg ntawm DuPont cov kws tshawb fawb.
Thaum xyoo 1950s, PET tuaj yeem hloov mus rau PET zaj duab xis. Tom qab ntawd rau xyoo 1970, PET tau siv ntau yam uas peb pom niaj hnub no. Piv txwv li hauv lub raj mis yas.
Kev Tshawb Fawb thiab Tsim PET
PET yas los ntawm polymerization ntawm terephthalic acid thiab ethylene glycol. Ob cov ntaub ntawv yog rhuab ua ke, nrog kev pab los ntawm cov catalysts, nyob rau hauv lub tshuab nqus tsev tsis tshua muaj siab los tsim molten PET. Raws li cov kua ua thicker, cov saw hlau polymer loj tuaj. Cov tshuaj tiv thaiv raug nres thaum qhov xav tau ntawm cov saw hlau polymer ntev tiav.
Qhov no ua rau nyias nyias ntawm PET uas yog extruded thiab txias. Cov strands raug txiav rau hauv pellets uas tuaj yeem rov qab tau thiab ncab tom qab los tsim cov khoom xav tau. Cov yeeb yaj kiab hauv qab no qhia txog cov txheej txheem ntawm kev tau txais los ntawm cov pellets no mus rau lub raj mis yas (Hloov mus rau 28 vib nas this).
Cov tshuaj formula rau PET yog (C10H8O4)n. Nws muaj qhov ceev ntawm 1.38 g / cm3. Nws melts li 482 degree F thiab boils ntawm 662 degree F.
FAQs ntawm PET yas
Puas yog PET Plastic Safe?
Yog lawm! PET tau siv nyab xeeb txij li xyoo 1940's. Raws li FDA, PET yas tuaj yeem siv tau zoo nrog txhua hom zaub mov thiab dej haus. Ntau cov kev tshawb fawb thiab kev sim paub tseeb FDA qhov kev txiav txim siab los sau npe PET tias muaj kev nyab xeeb rau kev siv khoom noj. Nws tsis muaj BPA.
PET yas txhais li cas?
PET Yas yog ib qho muaj zog, ntshiab, yas feem ntau siv rau ntim khoom noj, lub raj mis yas, thiab cov thawv hauv tsev. Nws lub npe tshuaj yog polyethylene terephthalate. Nws raug txheeb xyuas los ntawm tus lej 1 uas nyob ib puag ncig los ntawm lub cim rov ua dua tshiab.
Puas yog PET yas BPA dawb?
Yog lawm! PET yas yog txawv kiag li BPA. Thaum lawv siv rau cov khoom zoo sib xws, PET yas tsis muaj BPA.
Lub neej yav tom ntej ntawm PET
Lub sijhawm luv luv yav tom ntej ntawm PET yog qhov kaj. Nws yog ib qho khoom siv pheej yig, hnav nrog ntau yam kev siv. Nws khaws cov zaub mov thiab dej haus nyab xeeb thoob plaws ntiaj teb, ua qee yam khaub ncaws zoo, thiab tseem pab tiv thaiv malaria.
Lub sij hawm ntev yav tom ntej yog nyob ntawm seb qhov teeb meem ntawm cov pa phem tau daws li cas. Peb puas tseem yuav pov tseg peb cov dej hiav txwv thiab hav zoov nrog cov yas? Kev nce qib hauv kev tshawb fawb thiab thev naus laus zis puas tuaj yeem txhim kho cov txheej txheem rov ua dua tshiab? Yuav PLA tseem yuav loj hlob hauv kev muaj koob meej li niaj hnub no
