Mapurasitiki akaora anoreva kirasi yemapurasitiki ayo zvigadzirwa zvine zvinhu zvakasiyana-siyana zvinogona kusangana nezvinodiwa zvekushandisa, zvinoramba zvisingachinji panguva yekuchengetedza, uye zvinogona kuderedzwa kuita zvinhu zvinonzwika zvakatipoteredza pasi pemamiriro ekunze ezvakatipoteredza mushure mekushandiswa.Nokudaro, inonziwo plastiki inoparadza zvakatipoteredza.
Nguva yekushatisa yemapurasitiki anoparara pasi pemamiriro ekunze akajairika uye mamiriro evhu ndeye 3-6 mwedzi, nepo nguva yekushatisa yemapurasitiki akaparara echinyakare inotora makumi emakore kusvika kumazana emakore.
Kurongeka kwemapurasitiki anoparara
Zvinoenderana nemaitiro ekushatisa, yakakamurwa kuita: Photo-inoparara plastiki, biodegradable plastiki uye photo-biodegradable plastiki.
Mifananidzo-inoparara mapurasitiki:Iyo budiriro yakatanga uye yakakura kare, asi nekuda kwekuganhurirwa kwekushandisa, kugadzirwa kwakatanga kudzikira zvishoma nezvishoma muma1990;
Biodegradable plastiki:Yakapinda muchikamu chekugadzirwa kwemaindasitiri kubva padanho rekutsvagisa nekusimudzira, uye kudiwa kwepasirese uye kugona kwekugadzira kwakawedzera zvishoma nezvishoma.Kana mutengo wacho uchigona kudzikiswa zvakanyanya, zvinounza nguva yekubuda;
Photo-biodegradable plastiki:Kubatanidza zvakanakira maviri ekutanga, ndiyo ramangwana rekusimudzira kutungamira kwemapurasitiki anoparara, asi ichiri muchikamu cherabhoritari.
Pakati pawo, mapurasitiki anogona kukamurwa kuita bio-based-degradable plastics uye petroleum-based-degradable plastics zvinoenderana neyakagadzirwa zvinhu.
Biodegradable mapurasitiki: starch musanganiswa, PLA uye PHA;
Petroleum-based biodegradable plastics: PCL, PBS, PBAT, PPC, PGA.
Iyo huru mune ramangwana inonyatso kuparara epurasitiki PLA nePBAT.
PLA nePBAT akajairika mapurasitiki anoparara zvachose.Plastics inenge isina zvikanganiso mukupikisa, kutambanudza uye elasticity, uye tekinoroji yemumba yatokura.Parizvino ndiwo mapurasitiki akavimbiswa zvakanyanya.
PLA: Kuita kwepamusoro.PLA ine zvipingamupinyi zvehunyanzvi kune lactide.Iyo yakajairwa yakakwira-mamorekuru-huremu PLA yekugadzira maitiro ndeye lactide mhete-inovhura polymerization.Nekudaro, pane mukaha mukuru pakati petekinoroji yelactide yenyika yangu nenyika dzekunze, uye kune zvipingamupinyi zvehunyanzvi.
PBAT: Iyo yakanyanya kugona kukura, pane mukaha mudiki pakati pehunyanzvi hwepamba nenyika dzekunze.Chiyero chekushandiswa kwesimba chatova padanho repamusoro, uye mutengo unokwana 1.26 nguva yePE yakajairika, uye ine mamiriro ekupinda nekukurumidza kutenderera kutenderera.