Cov khoom lag luam sawv cev ntawm xya hom yas thiab cov lus qhia rau kev siv
Qhov no feem ntau qhia txog cov neeg sawv cev ntawm cov khoom siv ntawm xya hom yas no, thiab qhov peb yuav tsum tau ua tib zoo saib hauv peb lub neej txhua hnub vim yog cov yam ntxwv ntawm cov khoom siv.
1. Polyethylene terephthalate - 01 PET xws li: lub raj mis dej ntxhia, carbonated haus fwj
Kev Siv: Thaum tshav kub kub-resistant rau 70 degree, tsuas yog haum rau tuav dej sov los yog khov; nws yuav yooj yim deformed thaum uas muaj cov kua kub kub los yog rhuab, thiab cov khoom tsim kev puas tsuaj rau tib neeg lub cev yuav yaj tawm. Yog li ntawd, muab pov tseg lub fwj dej tom qab siv, thiab tsis txhob siv cov khob dej los yog cov thawv ntim khoom los tuav lwm yam khoom, kom tsis txhob muaj teeb meem kev noj qab haus huv.
2. High-density polyethylene - 02 HDPE xws li: cov khoom siv tu, khoom siv da dej.
Cov hnab yas zoo tib yam yog ua los ntawm polyethylene (PE), uas muaj qhov zoo toughness. PE kuj tau muab faib ua HDPE (high-density polyethylene) thiab LDPE (low-density polyethylene). Qhov sib txawv ntawm qhov ntom ntom ua rau qee yam ntawm nws cov khoom. Muaj qhov sib txawv loj dua.
Kev Siv: Lawv tuaj yeem rov qab siv tau tom qab ua tib zoo tu. Txawm li cas los xij, cov ntim khoom no feem ntau nyuaj rau kev ntxuav thiab khaws cov khoom siv tu qub, ua qhov chaw yug me nyuam rau cov kab mob. Nws yog qhov zoo tshaj kom tsis txhob siv lawv dua.
3. Polyvinyl chloride - 03 PVC xws li: qee yam khoom siv zoo nkauj.
Kev Siv: Cov khoom siv no yooj yim tsim cov khoom tsis zoo ntawm qhov kub thiab txias. Yog tias nws siv, tsis txhob cia nws sov. Tam sim no, cov thawv uas ua los ntawm cov khoom siv no tsis tshua muaj siv los ntim khoom noj.
4. Tsawg ntom polyethylene - 04 LDPE xws li: cling zaj duab xis, yas zaj duab xis, thiab lwm yam.
Kev Siv: Nws yog breathable thiab impermeable, thiab nws cov cua sov kuj tsis muaj zog. Feem ntau, tsim nyog PE cling zaj duab xis yuav yaj thaum qhov kub siab tshaj 110 degree, tawm hauv qee qhov kev npaj yas uas tsis tuaj yeem decomposed los ntawm tib neeg lub cev. Ua ntej muab tso rau hauv lub qhov cub microwave, nco ntsoov xyuas seb lub hnab yas puas muaj lo lus "microwave cua sov" luam tawm ntawm nws. Yog tias tsis muaj qhov kos npe zoo li no, nws tsis haum rau microwave cua sov.
5. Polypropylene - 05 PP (tuaj yeem tiv taus qhov kub siab tshaj 100 degrees) xws li: microwave su boxes.
Kev Siv: Qhov no yog lub thawv yas nkaus xwb ntawm xya uas tuaj yeem muab tso rau hauv lub microwave thiab tuaj yeem rov qab siv dua tom qab ntxuav. Nws yog ib qho tsim nyog sau cia tias rau qee lub thawv noj su hauv microwave, lub thawv lub cev yog ua los ntawm No. 5 PP, tab sis lub hau yog ua los ntawm No. 1 PE. Txij li No. 1 PE tsis tuaj yeem tiv taus qhov kub thiab txias, nws tsis tuaj yeem muab tso rau hauv lub qhov cub microwave ua ke nrog lub thawv lub cev. Yog li ntawd, koj tuaj yeem tshem lub hau ntawm lub thawv yas ua ntej muab tso rau hauv lub microwave.
Polypropylene kuj tau ua lub luag haujlwm tseem ceeb thaum lub sijhawm muaj kabmob sib kis: cov khaub ncaws tiv thaiv kev kho mob pov tseg thiab cov npog ntsej muag pov tseg feem ntau yog ua los ntawm cov ntaub tsis-woven uas txau rau kaum mus rau pua pua nanometers ntawm lo lo ntxhuav ntawm qhov kub thiab txias thiab tom qab ntawd tig nws. Ua los ntawm ntaub.
6. Polystyrene - 06 PS (kub tiv taus rau 60-70 degrees, uas muaj cov dej qab zib kub yuav tsim cov co toxins, thiab yuav tso tawm styrene thaum hlawv) xws li: lub tais ntawm instant noodle thawv, cov thawv ntim khoom noj ceev.
Kev Siv: Nws yog ob qho tib si kub-resistant thiab txias-resistant, tab sis tsis tuaj yeem muab tso rau hauv lub qhov cub microwave kom tsis txhob tso cov tshuaj vim yog kub dhau. Thiab nws tsis tuaj yeem siv los ntim cov kua qaub uas muaj zog (xws li kua txiv kab ntxwv) lossis cov tshuaj muaj zog alkaline, vim nws yuav decompose polystyrene uas tsis zoo rau tib neeg lub cev thiab tuaj yeem ua rau mob qog noj ntshav. Yog li ntawd, peb yuav zoo dua tsis siv cov thawv ntim khoom noj ceev kom ntim cov zaub mov kub.Vim nws tus nqi qis, nws yog tam sim no siv dav. Piv txwv li, ntau cov khoom siv yas pov tseg yog ua los ntawm nws. Txawm li cas los xij, nws yog qhov nyuaj rau degrade thiab ua rau muaj kev phom sij rau ib puag ncig. Nws raug nquahu kom txhua tus neeg sim tsis txhob siv cov khoom yas no hauv lawv lub neej.
7. Lwm yam yas codes - 07 Lwm yam xws li: kettles, khob, thiab me nyuam fwj.
Yog tias tsis muaj tus lej ntawm lub ntim yas, feem ntau nws yuav raug suav tias yog No.7 lossis lwm pawg.
