Nzira yekusarudza uye kutenga
Paunenge uchitenga firimu rekudya kana kuputira epurasitiki, iva nechokwadi chekutarisa zita chairo kana chimiro chemakemikari, uye chenjera kana chigadzirwa chine zita rechirungu chete uye pasina Chinese logo.Uyewo, iva nechokwadi chekusarudza zvigadzirwa zvakanyorwa nemashoko okuti "zvekudya".
Kune marudzi maviri makuru efirimu yezvokudya: polyethylene (PE) uye polypropylene (PP).Musiyano wemutengo pakati pezvigadzirwa zviviri hauna kukura, asi polypropylene (PP) iri nani pakumisa kupinda kwegirisi.
Paunenge uchitenga firimu yezvokudya, inotanga kukurudzirwa kutenga self-adhesive cling film yakagadzirwa ne polyethylene (PE), kunyanya kana iri kuuya pakuchengetedza nyama, michero, nezvimwewo, nokuti PE ndiyo yakachengeteka maererano nekuchengeteka.Kwehupenyu hurefu hwesherufu, polyvinyl chloride (PVDC) inokurudzirwa nekuti ine zvirinani kuchengetedza hunyoro uye ine hurefu hwesherufu yehupenyu hwemhando nhatu dzefirimu rekudya.Polyvinyl chloride (PVC) inonamatira firimu isarudzo yevanhu vazhinji nekuda kwekujeka kwayo, viscosity, elasticity uye mutengo wakachipa, asi zvinofanira kucherechedzwa kuti haigone kushandiswa kuchengetedza chikafu chine mafuta nekuti iresin inoumbwa ne polyvinyl chloride. resin, plasticizer uye antioxidant, iyo pachayo haina chepfu.Nekudaro, iwo maplasticizers uye antioxidants ayo anowedzerwa ane chepfu.Mapurasitiki anoshandiswa muPVC epurasitiki yekushandiswa kwezuva nezuva anonyanya dibutyl terephthalate uye dioctyl phthalate, ari makemikari ane chepfu.Izvi zvinokuvadza zvakanyanya pane endocrine system uye zvinogona kukanganisa muviri wehomoni metabolism.Lead stearate, polyvinyl chloride antioxidant, inewo chepfu.Zvigadzirwa zvePVC zvine lead salt antioxidants inotungamira lead kana yasangana ne ethanol, ether uye zvimwe zvinonyungudutsa.PVC ine muto wemunyu unoshandiswa sechikafu chekurongedza uye donuts, makeke akakangwa, hove yakakangwa, nyama yakabikwa, makeke uye masnacks kusangana, ichaita kuti mamorekuru anotungamira apararire mugirizi, saka haugone kushandisa PVC mabhegi epurasitiki chikafu chine mafuta.Mukuwedzera, hapana kupisa kwe microwave, hapana kushandiswa kwepamusoro-tembiricha.Nekuti PVC mapurasitiki zvigadzirwa zvinozoora zvishoma nezvishoma hydrogen chloride gasi patembiricha yakakwira, senge 50 ℃, uye gasi iri rinokuvadza kumuviri wemunhu, saka zvigadzirwa zvePVC hazvifanirwe kushandiswa sekurongedza chikafu.
Kuwanda kwekushandisa
Ongororo dzinoratidza kuti 100 magiramu ereki akaputirwa mupurasitiki, maawa makumi maviri nemana gare gare vhitamini C yayo inokwana 1.33 MG kupfuura kana isina kuputirwa, uye 1.92 MG yakawanda yekubatwa chibharo uye lettuce mashizha.Zvisinei, migumisiro yekuedza yeimwe miriwo yakanga yakasiyana zvikuru.Magiramu 100 eradish akaputirwa mupurasitiki akachengetwa kwezuva, uye vhitamini C yemukati yakaderedzwa ne 3.4 mg, bhinzi curd ne 3.8 mg, uye cucumber yakachengetwa kwezuva neusiku, uye kurasikirwa kwayo kwevhitamini C kwakafanana ne 5 maapuro.
Chikafu chakabikwa, chikafu chinopisa, chikafu chine mafuta, kunyanya nyama, zviri nani kusashandisa chengetedzo yepurasitiki.Vanamazvikokota vanoti kana zvikafu izvi zvasangana nefirimu rekudya, makemikoro ari mumidziyo anogona kunyungudika nekunyungudika muchikafu, izvo zvinogona kukanganisa hutano.Iyo yakawanda yefirimu yekudya inotengeswa pamusika inogadzirwa kubva kune imwecheteyo vinyl masterbatch seanowanzo shandiswa mabhegi epurasitiki.Zvimwe zvinhu zvefirimu zvinonamatira polyethylene (PE), iyo isina plasticizers uye yakachengeteka kushandisa;mamwe mapolyvinyl chloride (PVC), ayo anowanzo sanganisira stabilizers, lubricant, auxiliary processors uye zvimwe zvigadzirwa zvinogona kukuvadza vanhu.Nokudaro, iwe unofanira kungwarira pakusarudza.
Nguva yekutumira: Mar-16-2022