Inonyanya kushandiswa zvakare, PET kana PETE (polyethylene terephthalate) ipurasitiki yeplastiki uye chimiro che polyester. Polyethylene terephthalate ipolymmer yakagadzirwa nekubatanidzwa kwemaonomeri maviri: kuchinjwa ethylene glycol uye kucheneswa terephthalic acid. Yakatanga kuumbwa muNorth America neDupont chemist mukati me1940s.
Yakabatanidzwa ne # 1 code pane kana pedyo nechezasi kwebhodhoro nemidziyo, PET inowanzoshandiswa kuvhara mhando yezvinhu zvinosanganisira zvinwiwa, peanut butter, mabhakiro, zvibereko, mazaya echando, saradi yakagadzirwa, zvipfeko, uye vagadziri vemisha.
Iyo yakakosha nokuda kwesimba raro, kutsika-stability, uye pachena, PET isarudzo yakakurumbira yekuiswa. PET zvakare haina mari shoma, yakareruka, inogadziriswa, inopesana uye inogadziriswa.
Purotrahylene terephthalate yakagadziridzwa inozivikanwa se RPET, uye ndiyo ipurasitiki yakawanda kwazvo yakashandurwazve munyika. Maererano nePETRA, PET Resin Association, iyo inoshandiswa zvakare kuUnited States inenge 30%, neyo 52% muEuropean Union. Inenge 1.8 mabhiriyoni mapaundi ePET yakashandiswa zvakare muna 2015, yakashandiswa kugadzira michero yakasiyana-siyana. RPET inoshandiswa kwezvinhu zvitsva zvakadai se:
- polyester carpet fiber
- shangu yeT-shirts
- kwenguva refu pasi pepurasitiki
- athletic shoes
- mutoro, upholstery
- sweaters uye fiberfill yezvikwata zvehombodo uye nguvo dzechando
- industrious strapping
- pepa uye firimu
- motokari zvikamu
- itsva PET midziyo
Kushandiswa kwezvePET zvakare panzvimbo yemhandara resin inowanzokonzera kuderedzwa kushandiswa kwesimba, kudhura kwakaderera, uye kuderedzwa kwezvakatipoteredza.
Kuunganidza, Kuronga, uye Kuchengetedza
Post-mutengi PET nyaya inounganidzwa kuburikidza nemapurogiramu ekudzokororazve, anosanganisira zvose zviri zviviri chete uye nzira mbiri . Uyezve, mamwe mapurogiramu ePET akadzokidzwa kushandura mabhodhoro asina puropu ePET panzvimbo dzekukwirira kwakawanda sezviitiko zvakakura.
Zvinhu zvakashandiswa zvakare zvakadai sePET zvinogona kusarudzwa kubva kune dzimwezve zvekugadziriswa pane zvinhu zvekuchengetedza zvinhu , uye kusungirirwa kutumira kune imwe nzvimbo yePET yakashandurazve. Sezvimwe zvinhu zvakagadziriswa, kutarisirwa kunofanira kushandiswa kukurudzira zvakakodzera kushandiswa kwebhu nekuchengetedza maitiro kuitira kuderedza kusvibiswa kwechigadzirwa.
Pashure pokusvika pane imwe nzvimbo yakashandiswa zvakare yakadai seEECOSTAR, bales inotanga kushandiswa isati yaiswa iyo inofambisa uye inopa zvokudya kumunhu anonzi bale. Bales zvino inoparadzaniswa, uye mabhodhoro anonyorwa. Nyaya iyi inogona kunge isati yagezwa, uye mabhii abviswa, achishandisa steam uye makemikari. Munguva yekutanga kushambidza, mabhodhoro akatumirwa nemvura inopisa kana kuti moto unopisa trommel huchaita kuti mabhodhoro ePVC aende zvishoma, achiita kuti zvive nyore kutsanangurwa uye kubviswa panguva yekunyora magwaro.
Iko kusati-kushambidza uye kubviswa kwemavara kunobvumira kutsanangurwa nyore kwezvinhu zvinoshandisa Near Infrared (NIR) kusarudza midziyo kubvisa zvimwe zvinhu. Dzimwe mishonga inoshandiswa inosanganisira mashizha emagetsi uye mabhanhire ekugadzira mabhuku anogona kubvisa PET kubva pabhanhire kana kubvisa zvimwe zvinhu uye kusiya PET pabhanhire.
Nzira dzekugadzirisa mabhuku dzinogona kusanganisira dzakanaka (kubvisa PET kubva pane zvinobuda) kana kuti zvisina kunaka (kubvisa zvinhu zvisiri PET) kusarudza.
Mushure mokunge varongedzwa, zvinhu zvePET zvinoshandiswa kuva zvikamu zvinozivikanwa se "flakes". Mucheka wakachena ndiyo inokosha yekuchengetedza kukosha kwepurasitiki yakadzorerwa. Zvimwe nzira dzekuparadzanisa dzinosanganisira kuchenesa uye kutaridzika kwemhepo pamwe nemvura yokushambidza (kunyura / kutenderera) kuparadzanisa zvigadziriswa zvekunze zvekunze.
Kushambidza kunogona kuitika pahutano kana hupamhi hwehuni hwepamusoro. Kushandiswa kwemishonga inoshandiswa kwemishonga inorasikirwa nemiti inogadziriswa pakuzadzisa zvakakwana.
Mushure mekupera kwekugaya, kushambidza, nekuparadzanisa matanho, zvinhu zvakashambidzwa kuti zvibvise zvakasara zvinosara kana kuchenesa. Iyo PET yakashandurwa zvakare yakasvava isati yadzorerwa zvakare seyinhu yekugadzira kana kuti isati yaendeswa mberi.
Kusungunusa kunyorera kunogona kuwedzera kuchenesa zvinhu kuburikidza nokubviswa kwezvisizvo zvisingasviki zvinosvibisa zvinogona kunge zvakasara pamatanho apfuura.
Zvinyorwa zvakapfuuridza zvinopfuura nepakati pezvikamu zvezvikwangwani kuti zvigadzire pellets apo kusina kusungurudzika. Plastiki inotapira inopa zvinhu zvakafanana-siyana zvinogona kudzokororwa zvakare mukugadzira.
Kudzorera kwehuwandu muUnited States yakaramba yakanyarara kana kuti ichiderera mumakore achangopfuura. Iyi mamiriro akave akaratidzirwa nechizvarwa chisinganyanyi kudarika kuburikidza nemapurogiramu ekudzokororazve, izvo zvinowanzoenderana nekuderedza kufarirwa kwezvinwiwa zvinokonzerwa necarbon, uyewo matanho anotarisana nekugadzirwa kwehombodo dzinowedzera.
Kuti uwane zvakawanda pamusoro pekushandisazve PET, shanyira Association yePlastics Recyclers kana PETRA.