Chii chinonzi PET? -Kuongorora Kwakakwana kwePolyethylene Terephthalate
PET, kana Polyethylene Terephthalate, chinhu chepolymer chinoshandiswa zvakanyanya muindasitiri yemakemikari. Muchikamu chino, tichapa kuongorora kwakadzama kwetsanangudzo yePET, nzvimbo dzekushandiswa kwayo, maitiro ekugadzira uye zvakanakira, kuitira kupa vaverengi kunzwisisa kwakakwana kwePET sechinhu chakakosha.
Tsanangudzo uye Zvivakwa Zvekutanga zvePET
Chii chinonzi PET? Kemikari, PET inonzi thermoplastic polymer yakagadzirwa nepolymerisation ye terephthalic acid uye ethylene glycol.Chimiro chemakemikari chePET chinopa hutano hwakanaka hwemagetsi zvakadai sesimba guru, kupisa kupisa uye kujekesa kwakanaka. Izvi zvivakwa zvinoita kuti PET ive yesarudzo mune akawanda maficha ekushandisa, kunyanya muchikamu chekurongedza.
Nzvimbo huru dzekushandisa dzePET
PET inoshandiswa mumhando dzakasiyana-siyana dzekushandisa, inotarisa panzvimbo mbiri huru: kurongedza zvinhu uye fiber kugadzira. Muindasitiri yekurongedza, PET inowanzo shandiswa mukugadzira zvigadzirwa zvakaita semabhodhoro epurasitiki, midziyo yechikafu nemafirimu, uko kujeka kwayo uye yakanaka gasi inodzivirira zvinhu inovimbisa kuti chikafu chiri mukati mepasuru chinogara chiri chitsva.PET inoshandiswawo seyakagadzirwa mafibers ekugadzira, ayo anoshandiswa zvakanyanya muindasitiri yemachira, kunyanya mukugadzirwa kwepolyester fibres. Nguo dzakagadzirwa nepolyester fiber dzakaoma-kupfeka, dziri nyore kugeza uye dzinokurumidza kuoma, zvichiita kuti dzive dzakanaka pakupfeka kwemazuva ose.
Iyo PET yekugadzira maitiro
Kunzwisisa kuti PET chii kunodawo kutarisa kwakadzama pakugadzirwa kwayo, iyo inoitwa nenzira mbiri huru: nhanho imwe (yakananga esterification) uye nhanho mbiri (ester exchange). Mune imwe nhanho-nhanho, terephthalic acid inopindirana zvakananga ne ethylene glycol pakupisa kwepamusoro uye kumanikidzika kuti ibudise PET, asi mumatanho maviri, ethylene glycol esters inoumbwa kutanga, uye ipapo polycondensation inoitwa kuti ibudise PET.Zvisinei nezve nzira inoshandiswa, chigadzirwa chekupedzisira chinoda kuiswa pasi pemajekiseni anotevera-exmoulding, kuputika kwemajekiseni anotevera, kuputika kwekuita-extruder, kuputika kwekuita, kuputika kwekuita-exmoulding matanho, kuputika kwakadai se-exmoulding, kuputika-kubuda. kuitira kugadzirira chigadzirwa chakaumbwa.
Zvakanakira uye Kusimba kwePET
Chii chinonzi PET? Kubva pakuona kwekusimudzira, zvakanakira zvePET zviri mukugadzirisa kwayo kwakanaka; Zvigadzirwa zvePET zvinogona kudzokororwa kuburikidza nepyrolysis, makemikari kudzokorodza uye dzimwe nzira dzekudzikisa kusvibiswa kwezvakatipoteredza, uye simba rePET rakakwirira uye rakareruka zvivakwa zvinopawo mukana mukuderedza kushandiswa kwezvinhu uye mutengo wekufambisa. Aya maitiro anoita PET imwe yezvinhu zvakakosha zvakasvibirira muindasitiri yemazuva ano.
Mhedziso
Kupfupisa, chii chinonzi PET? Iyo yakakwira-inoshanda polymer zvinhu zvine huwandu hwakawanda hwekushandisa.PET inoita basa rakakosha muindasitiri yemazuva ano nekuda kweiyo yakanakisa physicochemical properties, yakawanda yekushandiswa uye yakanaka recyclability. Kunyangwe iri mukurongedza zvinhu muhupenyu hwemazuva ese kana kugadzirwa kwefiber muindasitiri yemachira, pesvedzero yePET iri kwese kwese. Nokudaro, kunzwisisa kwakadzama kwePET kwakakosha pakunzwisisa mafambiro ezvigadzirwa zvemakemikari zvemazuva ano.