Munzanga yemazuva ano, kushandiswa kwemidziyo yepurasitiki yekuchengetedza chikafu kwakapararira. "Chikafu-giredhi" zvinoreva zvinhu zvakachengetedzeka pakubata chikafu, uye kunzwisisa kuti mapurasitiki anosangana nechiyero ichi kwakakosha kune vese vanogadzira nevatengi. Pakati pemapurasitiki akasiyana-siyana, PET (polyethylene terephthalate) inozivikanwa zvakanyanya nekuda kwekuchengetedza kwayo uye kushandiswa kwakawanda mukurongedza chikafu. Chinyorwa chino chichaongorora maitiro echikafu-mapurasitiki egiredhi, tichitarisa nezvechikafu-giredhi rePET mabhokisi ekurongedzerwa, uye kutsanangura kuti sei achionekwa seakachengeteka uye akavimbika ekuchengetedza chikafu.
Dzidza nezvekudya-mapurasitiki egiredhi
Chikafu-mapurasitiki egiredhi zvinhu zvakaedzwa nemasangano anodzora akadai seUS Food and Drug Administration (FDA) neEuropean Food Safety Authority (EFSA) uye zvakanzi hazvina njodzi pakubata chikafu. Mapurasitiki aya haafanire kuve nemakemikari anokuvadza anogona kupinda muchikafu uye kuisa njodzi pahutano. Zviyero zvechikafu-mapurasitiki egiredhi zvinosanganisira kusave{{6}chepfu, kusaita ngura kwemakemikari, uye kugona kuramba kugadzikana uye kusaparara-pakupisa kwakasiyana-siyana.
Pakati pemapurasitiki akasiyana-siyana, PET ndechimwe chezvinhu zvinowanzo shandiswa pakurongedza chikafu. Kuzivikanwa kwaro kunobva pane zvakanakisa zvipingamupinyi zvivakwa, izvo zvinobatsira kuchengetedza kutsva uye kunaka kwechikafu. PET ine zvakare zvakanakira sekureruka, shatter{2}}inodzivirirwa, uye inogona kushandiswa zvakare, zvichiita kuti ive sarudzo inochengetedza nharaunda. PET yekurongedza mabhokisi anonyanya kufarirwa nekujeka kwawo, zvichiita kuti zvive nyore kune vatengi kuona zviri mukati.
Hunhu hwePET sechikafu-giredhi zvinhu
PET ipolyester yakagadzirwa kubva ku ethylene glycol uye terephthalic acid. Chimiro chayo chemorekuru chinoiisa nehupamhi hwekristaro, nekudaro ichiwedzera simba rayo uye kusimba. Imwe yeakakosha maitiro ePET ndeye inertness yayo, zvinoreva kuti haizoite nezvikafu zvinongedzo. Hunhu uhu hwakakosha pakuchengetedza kuvimbika nekuchengetedzeka kwechikafu.
Mukuwedzera, PET inopesana neacids nemafuta, ayo anowanzo kuwanikwa muchikafu. Uku kuramba kwecorrosion kunovimbisa kuti kurongedza hakuzoparadze kana kukanganisa kunaka kwechikafu. Uye zvakare, PET inogona kumirisana neyakasiyana tembiricha, kubva kuchando kusvika pakuvira, pasina kurasikirwa nehunhu hwayo. Izvi zvinoita kuti ive yakakodzera kune zvakasiyana-siyana zvekuchengetedza zvekudya, kubva kune zvekudya zvefiriji kusvika kune zvinopisa.
Zvishandiso zvechikafu-magiredhi ePET mabhokisi
Mabhokisi echikafu{{0}egiredhi ePET ane mashandisirwo akasiyana-siyana, kubva pakuchengeterwa chikafu chepamba kusvika pakurongedza chikafu chekutengesa. Mumba, mabhokisi aya akanakira kuchengetedza zvakasara, kugadzira chikafu, uye kuronga pantry yekuchengetera. Hunhu hwayo hwakajeka uye huremu hunoita kuti zvive nyore kushandisa muhupenyu hwezuva nezuva.
Muchikamu chezvekutengesa, PET mabhokisi anoshandiswa zvakanyanya kurongedza zvirimwa zvinyoro, zvakabikwa, uye zvagadzirira-ku{1}}kudya. Mabhokisi echikafu{{3}egiredhi ePET anonyanya kufarirwa muindasitiri yezvigadzirwa zvitsva nekuti anovharisa hunyoro neokisijeni, nokudaro achiwedzera hupenyu hwesherufu yemichero nemiriwo. Izvi hazvingobatsiri chete kuchengetedza kutsva kwezvibereko asiwo zvinoderedza kuraswa kwechikafu.
Kukanganisa kwezvakatipoteredza uye kudzokororwa kwePET
Imwe yemabhenefiti makuru ePET ndeyekudzokorodza kwayo. PET inogona kudzokororwa kakawanda pasina kurasikirwa nemidziyo yayo yekutanga, zvichiita kuti ive sarudzo inogoneka yekurongedza chikafu. Maitiro ekudzokorodza anosanganisira kuchenesa nekugadzirisa zvinhu kugadzira zvigadzirwa zvitsva, nekudaro kuderedza kudiwa kwemapurasitiki emhandara uye kuderedza kukanganisa kwezvakatipoteredza.
Kudzokorodza PET hakungochengetedze zviwanikwa chete asiwo kunoderedza kuburitsa gasi regreenhouse rine chekuita nekugadzirwa kwepurasitiki. Makambani mazhinji ave kushandisa masisitimu akavharika ekudzokorodza kunotora magaba ePET, oashandisa patsva, nekuashandisa pakugadzira mapakeji matsva. Iyi nzira inopindirana nemitemo yehupfumi hunotenderera, hunoita kuti hupfumi hurambe huripo uye kuderedza marara.
Matambudziko uye Mafungiro Ekushandisa PET muChikafu Packaging
Kunyangwe kune akawanda mabhenefiti ePET, kushandiswa kwayo mukurongedza chikafu kunotarisanawo nemamwe matambudziko. Rimwe rematambudziko makuru ndeye mukana wekudonha kwekemikari, kunyanya kana PET ichiratidzwa kune tembiricha yakanyanya. Kunyange zvazvo PET ichiwanzoonekwa seyakakotsekana, nhungamiro dzetembiricha dzinokurudzirwa dzinofanira kuteverwa zvakasimba kudzivirira ngozi ipi neipi yokutapukirwa.
Chimwe chinhu chekufunga nezvacho kukanganisa kwezvakatipoteredza kwePET kugadzirwa. Kunyange zvazvo PET ichishandiswa patsva, magadzirirwo ayo ane simba-akawanda uye anovimba ne-zvinoshandiswa patsva. Kudzikamisa kukanganiswa uku, vagadziri vari kuongorora kushandiswa kwePET (rPET) uye bio{{4}based PET, zvinhu zvakatorwa kubva kune zvinogonekazve zvine kabhoni yakaderera.
Mhedziso
Muchidimbu, PET chikafu chinogoneka uye chakavimbika-giredhi rekurongedza zvinhu. Kuchengetedzeka kwayo, kusimba, uye kudzokorodza kunoita kuti ive yakanaka kune vese vatengi nevagadziri. Nekuwedzera kuri kuita kudiwa kwezvigadziriso zvekurongedza, kuvandudzwa kwezvigadzirwa zvePET, sechikafu-giredhi PET mabhokisi, zvichaita basa rakakosha mukuzadzisa zvinodiwa neindasitiri yechikafu uye kuderedza kukanganiswa kwezvakatipoteredza. Nekunzwisisa zvimiro uye mashandisirwo echikafu-mapurasitiki egiredhi, tinokwanisa kuita sarudzo dzine ruzivo dzinoenzanisa kuchengetedzeka uye kusimba.
