Yuav xaiv thiab yuav li cas
Thaum muas ib zaj duab xis cling los yog yas qhwv, nco ntsoov nrhiav ib lub npe tshwj xeeb lossis cov qauv tshuaj, thiab ceev faj yog tias cov khoom tsuas muaj lub npe Askiv thiab tsis muaj lub logo Suav.Tsis tas li, nco ntsoov xaiv cov khoom cim nrog cov lus "rau zaub mov".
Muaj ob lub ntsiab ntawm cling zaj duab xis: polyethylene (PE) thiab polypropylene (PP).Tus nqi sib txawv ntawm ob yam khoom tsis zoo, tab sis polypropylene (PP) zoo dua ntawm kev txwv tsis pub nkag mus rau roj.
Thaum muas cling zaj duab xis, nws yog thawj zaug pom zoo kom yuav tus kheej-nplaum cling zaj duab xis ua los ntawm polyethylene (PE), tshwj xeeb tshaj yog thaum nws los txog rau khaws cia nqaij, txiv hmab txiv ntoo, thiab lwm yam, vim PE yog qhov zoo tshaj plaws ntawm kev nyab xeeb.Rau lub neej txee ntev dua, polyvinyl chloride (PVDC) raug pom zoo vim tias nws muaj cov khoom ruaj khov zoo dua thiab muaj lub txee ntev tshaj plaws ntawm peb hom cling zaj duab xis.Polyvinyl chloride (PVC) cling zaj duab xis kuj yog qhov kev xaiv ntawm ntau tus neeg vim nws cov pob tshab zoo, viscosity, elasticity thiab pheej yig dua tus nqi, tab sis nws yuav tsum tau muab sau tseg tias nws tsis tuaj yeem siv los khaws cov zaub mov greasy vim nws yog cov resin muaj li ntawm polyvinyl chloride. resin, plasticizer thiab antioxidant, uas nws tus kheej tsis muaj tshuaj lom.Txawm li cas los xij, cov plasticizers thiab antioxidants uas tau ntxiv yog tshuaj lom.Cov yas siv hauv PVC yas siv rau niaj hnub yog feem ntau yog dibutyl terephthalate thiab dioctyl phthalate, uas yog cov tshuaj lom.Qhov no muaj txiaj ntsig zoo rau tib neeg endocrine system thiab tuaj yeem cuam tshuam lub cev cov tshuaj hormones metabolism.Lead stearate, polyvinyl chloride antioxidant, kuj yog tshuaj lom.PVC cov khoom uas muaj cov hmoov lead ntsev antioxidants precipitate lead thaum nyob rau hauv kev sib cuag nrog ethanol, ether thiab lwm yam kuab tshuaj.PVC uas muaj cov ntsev ntsev siv los ua cov ntim khoom noj thiab cov khoom noj khoom haus, cov ncuav ci, cov ntses kib, cov khoom noj nqaij, ncuav thiab khoom noj txom ncauj, nws yuav ua rau cov hmoov lead molecules diffuse rau hauv cov roj, yog li koj tsis tuaj yeem siv PVC hnab yas rau cov khoom noj uas muaj roj.Tsis tas li ntawd, tsis muaj cua sov microwave, tsis siv qhov kub thiab txias.Vim tias PVC cov khoom yas yuav maj mam decompose hydrogen chloride roj ntawm qhov kub thiab txias, xws li txog 50 ℃, thiab cov roj no muaj kev phom sij rau tib neeg lub cev, yog li cov khoom siv PVC yuav tsum tsis txhob siv los ua cov ntim khoom noj.
Scope ntawm kev siv
Kev sim qhia tau hais tias 100 grams ntawm leek qhwv hauv hnab yas, 24 teev tom qab ntawd nws cov ntsiab lus vitamin C yog 1.33 mg ntau dua li thaum nws tsis qhwv, thiab 1.92 mg ntau dua rau kev rape thiab lettuce nplooj.Txawm li cas los xij, qhov kev sim ntawm qee cov zaub tau txawv heev.100 grams ntawm radish qhwv hauv hnab yas tau khaws cia rau ib hnub, thiab nws cov ntsiab lus vitamin C raug txo los ntawm 3.4 mg, taum curd los ntawm 3.8 mg, thiab dib tau khaws cia rau ib hnub thiab ib hmo, thiab nws cov vitamin C poob yog sib npaug rau. 5 txiv apple.
Khoom noj khoom haus, khoom noj kub, khoom noj muaj roj, tshwj xeeb tshaj yog cov nqaij, nws yog qhov zoo tshaj plaws tsis txhob siv cov ntaub qhwv yas.Cov kws tshaj lij hais tias thaum cov khoom noj no tuaj yeem sib cuag nrog cov yeeb yaj kiab cling, cov tshuaj muaj nyob hauv cov khoom tuaj yeem yooj yim evaporate thiab yaj mus rau hauv cov zaub mov, uas tuaj yeem cuam tshuam rau kev noj qab haus huv.Feem ntau ntawm cling zaj duab xis muag ntawm lub khw yog tsim los ntawm tib vinyl masterbatch raws li feem ntau siv hnab yas.Qee cov ntaub ntawv cling zaj duab xis yog polyethylene (PE), uas tsis muaj cov yas yas thiab siv tau zoo;lwm tus yog polyvinyl chloride (PVC), uas feem ntau suav nrog cov stabilizers, lubricants, auxiliary processors thiab lwm yam khoom siv raw uas tuaj yeem tsim kev puas tsuaj rau tib neeg.Yog li ntawd, koj yuav tsum tau ceev faj hauv kev xaiv.
Lub sij hawm xa tuaj: Mar-16-2022