Cholinga choyamba cha mankhwala opangira zinyalala zamapulasitiki ndikubwezeretsanso zotengera monga zothandizira kuteteza chuma chochepa ndikumaliza kukonzanso zotengerazo.Pakati pawo, 28% ya mabotolo a PET (polyethylene terephthalate) omwe amagwiritsidwa ntchito pa zakumwa za carbonated amatha kubwezeretsedwanso, ndipo HD-PE (high-density polyethylene) ndi HD-PE ya mabotolo amkaka amatha kubwezeretsedwanso bwino.Kuti muthandizire kukonzanso zinthu zapulasitiki zamitundu yosiyanasiyana mukatha kudya, ndikofunikira kusankha mitundu yosiyanasiyana yazinthu zamapulasitiki.Chifukwa pali njira zambiri komanso zovuta zogwiritsira ntchito pulasitiki, n'zovuta kusiyanitsa mitundu ina yazinthu zapulasitiki pambuyo pozidya ndi maonekedwe.Choncho, ndi bwino kuyikapo chizindikiro pazinthu zapulasitiki.Kodi kugwiritsa ntchito, ubwino ndi kuipa kwa ma code osiyanasiyana ndi chiyani?Zomwe zili mu chizindikiritso cha pulasitiki cha SPI zidzafotokozedwa pansipa.
Dzina la pulasitiki - kachidindo ndi kachidindo kofananira ndi izi:
Polyester - 01 PET(botolo la PET), mongabotolo la madzi amcherendi botolo la zakumwa za carbonated.Yesani: Osabwezeretsanso madzi otentha m'mabotolo a zakumwa.
Gwiritsani ntchito: Imatha kutentha mpaka 70 ℃, ndipo ndiyoyenera kudzaza zakumwa zotentha kapena zakumwa zachisanu.Ngati wadzazidwa ndi madzi otentha kwambiri kapena wotenthedwa, ndi wosavuta kupunduka, ndipo zinthu zovulaza thupi la munthu zimasungunuka.Komanso, asayansi adapeza kuti pakatha miyezi 10 yogwiritsidwa ntchito, pulasitiki No. 1 ikhoza kutulutsa carcinogen DEHP, yomwe imakhala poizoni kwa ma testes.Choncho, botolo la zakumwa likatha, litaya, ndipo musaligwiritse ntchito ngati kapu yamadzi kapena chosungiramo kuti munyamule zinthu zina, kuti musawononge thanzi.
High kachulukidwe polyethylene - 02 HDPE, mongazoyeretsandi mankhwala osambira.Yesani izi: Sitikulimbikitsidwa kukonzanso ngati kuyeretsa sikunathe.
Gwiritsani ntchito: Itha kugwiritsidwanso ntchito mukatsuka mosamala, koma zotengerazi nthawi zambiri zimakhala zovuta kuyeretsa.Zopangira zoyeretsera zoyambirira zimakhalabe ndikukhala malo otentha a mabakiteriya.Kulibwino osawagwiritsanso ntchito.
PVC - 03 PVC, monga zinthu zina zokongoletsera
Gwiritsani ntchito: Izi ndizosavuta kupanga zinthu zovulaza zikatentha, ndipo ngakhale zimatulutsidwa panthawi yopanga.Zinthu zapoizonizo zikalowa m’thupi la munthu ndi chakudya, zingayambitse khansa ya m’mawere, kubadwa kwa ana obadwa kumene ndi matenda ena.Pakali pano, zotengera zopangidwa ndi zinthuzi sizimagwiritsidwa ntchito kwambiri kulongedza chakudya.Ngati ikugwiritsidwa ntchito, musalole kuti itenthedwe.
Otsika osalimba polyethylene - 04 LDPE, monga filimu yosungira mwatsopano, filimu yapulasitiki, ndi zina zotero.
Ntchito: Kukana kutentha sikolimba.Nthawi zambiri, filimu yoyenerera ya PE yosunga mwatsopano imasungunuka kutentha kupitilira 110 ℃, kusiya mapulasitiki ena omwe sangathe kuwola ndi thupi la munthu.Kuonjezera apo, ngati chakudyacho chakulungidwa ndi pulasitiki kuti chiwotchere, mafuta omwe ali m'zakudya amatha kusungunula zinthu zovulaza mu pulasitiki.Choncho, chakudya chikayikidwa mu uvuni wa microwave, filimu yosungira mwatsopano iyenera kuchotsedwa poyamba.
Polypropylene - 05 PP(wokhoza kupirira kutentha pamwamba pa 100 ℃), mongabokosi la chakudya chamasana mu uvuni wa microwave.Yesani: Chotsani chivundikirocho pochiyika mu uvuni wa microwave
Gwiritsani ntchito: Bokosi la pulasitiki lokhalo lomwe lingayikidwe mu uvuni wa microwave litha kugwiritsidwanso ntchito mukatsuka mosamala.Chisamaliro chapadera chiyenera kuperekedwa ku mabokosi ena a nkhomaliro a microwave.Thupi la bokosilo limapangidwadi ndi No. 5 PP, koma chivundikiro cha bokosi chimapangidwa ndi No. 1 PE.Popeza PE silingathe kupirira kutentha kwakukulu, silingayikidwe mu uvuni wa microwave pamodzi ndi bokosi la bokosi.Kuti mukhale otetezeka, chotsani chivundikirocho musanayike chidebecho mu uvuni wa microwave.
Polystyrene - 06 PS(Kukana kutentha ndi 60-70 ° C, zakumwa zotentha zimatulutsa poizoni, ndipo styrene idzatulutsidwa ikayaka) Mwachitsanzo: mbale yodzaza mabokosi a Zakudyazi, mabokosi a chakudya chofulumira.
Yesani: Musagwiritse ntchito ng'anjo ya microwave kuphika mbale za Zakudyazi zapomwepo: sizimatentha komanso sizizizira, koma sizingayikidwe mu uvuni wa microwave kuti musatulutse mankhwala chifukwa cha kutentha kwambiri.Ndipo sangagwiritsidwe ntchito pokweza asidi amphamvu (monga madzi a lalanje) ndi zinthu zamphamvu zamchere, chifukwa zidzawola polystyrene zomwe ndizoipa kwa thupi la munthu komanso zosavuta kuyambitsa khansa.Chifukwa chake, muyenera kuyesetsa kupewa kunyamula zakudya zotentha m'mabokosi azakudya mwachangu.
Zizindikiro zina zapulasitiki - 07 Zinamonga: ketulo, kapu, botolo la mkaka
Malingaliro: PC guluu angagwiritsidwe ntchito ngati kutentha kutulutsa bisphenol A: ndi zinthu zomwe zimagwiritsidwa ntchito kwambiri, makamaka m'mabotolo amkaka.Ndizotsutsana chifukwa zili ndi bisphenol A. Lin Hanhua, pulofesa wothandizira ku Dipatimenti ya Biology ndi Chemistry ya City University of Hong Kong, adanena kuti, malinga ngati BPA imasinthidwa kukhala pulasitiki 100% panthawi yopanga PC. , zikutanthauza kuti zinthuzo zilibe BPA, osasiya kuzimasula.Komabe, ngati pang'ono bisphenol A sichinatembenuzidwe mu pulasitiki ya PC, ikhoza kumasulidwa kukhala chakudya kapena zakumwa.Chifukwa chake, ndikofunikira kusamala mukamagwiritsa ntchito chidebe chapulasitiki ichi.
Nthawi yotumiza: Dec-16-2022