Qhov txawv ntawm PVC, PE thiab PP yog dab tsi thiab thaum twg koj siv cov yas tshwj xeeb?
3. Polyvinyl chloride (V lossis Vinyl lossis PVC)
Nqe lus piav qhia: Ntev thib ob feem ntau siv cov yas yas hauv ntiaj teb (tom qab polyethylene), PVC (lossis yas) siv tau poob qis vim muaj kev noj qab haus huv loj thiab ib puag ncig muaj kuab paug cuam tshuam nrog nws cov khoom siv, siv thiab pov tseg - nws tag nrho lub neej voj voog yog tshuaj lom. Tab sis nws tseem nrov thiab siv ntau vim nws cov nqi-zoo versatility.
Lub hauv paus monomer yog vinyl chloride - lub xub ntiag ntawm cov tshuaj chlorine yog qhov ua rau muaj ntau yam ntawm PVC cov teeb meem - uas tuaj yeem ua ke thiab sib xyaw nrog ntau cov tshuaj (xws li cov yas xws li phthalates) los tsim cov resins nrog cov khoom xws li txhav mus rau filmy mus rau mos rau tawv. . Properties: versatility, yooj yim ntawm blending, lub zog, toughness, clarity, transparency.
Kev Siv: Cov PVC mos mos (softened nrog plasticizers) siv rau hauv cov khoom ua si, cov zaub mov ntshiab (xws li, tshem tawm) thiab cov khoom ntim uas tsis yog khoom noj (xws li, blister wrap, cling wrap), nyem fwj, tshuaj zawv plaub hau, fwj tshuaj ntxuav qhov ncauj, roj ua noj thiab Cov txiv laum huab xeeb butter jars, tshuaj ntxuav tes thiab lub qhov rais ntxuav lub fwj, cov nplooj xoob xoob, cov ntaub thaiv da dej, cov hnab ntim ntshav thiab cov raj kho mob, cov khaub ncaws "pleather", Naugahyde upholstery, hlau thiab cable rwb thaiv tsev, ntaub pua plag rov qab thiab hauv pem teb. Rigid PVC siv rau cov pob blister thiab clamshell ntim, credit cards, piping (piv txwv li, rau kav dej), vinyl siding, qhov rais thav duab, laj kab, decking, thiab lwm yam khoom siv.
Toxicity: PVC yog dav suav hais tias yog cov tshuaj lom thiab phom sij tshaj plaws uas tseem yog - tsis txaus ntseeg - feem ntau siv los ua ntau yam khoom siv. Nws tuaj yeem muaj thiab / lossis tshem tawm ntau yam tshuaj lom xws li, tab sis tsis txwv rau: bisphenol A (BPA), phthalates, lead, dioxins, mercury, thiab cadmium. Ntawm no yog qhov saj ntawm lub neej muaj kuab lom ntawm PVC:
• Cov vinyl chloride monomer los ntawm PVC yog ua los ntawm cov carcinogen, yog li ua rau cov neeg ua haujlwm tsim khoom thiab cov zej zog ib puag ncig muaj kev pheej hmoo.
• Cov ntaub ntawv mos ntawm PVC, xws li cov khoom ua si thiab ntim thiab lub raj mis, tuaj yeem ua rau phthalates. Piv txwv li, di({0}}ethylhexyl) phthalate (DEHP) thiab butyl benzyl phthalate (BBzP) yog ob lub phthalates uas feem ntau siv los ua cov yas lossis cov khoom muag muag (feem ntau yog DEHP). DEHP thiab BBzP yog cov kab mob endocrine cuam tshuam rau cov poj niam cov tshuaj estrogen thiab tau txuas nrog cov tsos mob hawb pob thiab tsis haum rau cov menyuam yaus nyob hauv cov tsev uas muaj cov plua plav PVC thiab ADHD hauv cov menyuam yaus; tuaj yeem ua rau qee yam mob qog noj ntshav, suav nrog mob qog noj ntshav mis. Tsis ntev los no kev cai lij choj ntawm cov neeg siv khoom lag luam hauv Tebchaws Europe, Canada thiab Asmeskas, txwv tsis pub DEHP thiab BBzP thiab lwm yam phthalates txaus ntshai los ntawm kev siv rau cov menyuam yaus cov khoom hauv ntau dua 0.1 feem pua.
• Thaum PVC raug hlawv (piv txwv li, los ntawm kev tua pov tseg, tsheb lossis hluav taws hauv tsev), dioxins raug tsim. Dioxins paub txog tib neeg cov kab mob carcinogens thiab cov kuab tshuaj tsis tu ncua, thiab suav tias yog ib hom tshuaj lom neeg uas tau sim.
Recycling Rate: Tsawg heev. Tsis tshua muaj rov siv dua vim nws nyuaj rau ua li ntawd ntawm kev lag luam. Nws yuav tsum tsis txhob muab coj los siv dua vim tias nws ua rau cov kwj deg rov ua dua tshiab. Recycled PVC tuaj yeem dhau los ua ntim, khi, decking, paneling, rwb thaiv tsev, av nkos, zaj duab xis thiab ntawv, flooring, vaj hoses.
Polyethylene (PE)… muaj ntau hom polyethylene (Kuv tau piav 2 hauv qab no)…
2. High density polyethylene (HDPE)
Nqe lus piav qhia: Polyethylene yog cov tsev neeg siv ntau tshaj plaws ntawm cov yas hauv ntiaj teb. Ntau yam polyethylene polymer muaj cov qauv tshuaj yooj yim tshaj plaws ntawm cov yas polymer (rov ua dua ntawm CH2: ib qho carbon thiab ob lub hydrogen molecules) ua rau nws yooj yim heev rau txheej txheem thiab yog li nrov heev rau ntau daim ntawv thov nqi qis - tshwj xeeb tshaj yog ntim.
Kev Siv: Cov hnab yas (khoom noj khoom haus), opaque mis nyuj, dej, thiab kua txiv ntim ntim, tshuaj dawb, tshuaj ntxuav tes thiab tshuaj zawv plaub hau, hnab khib nyiab, tais diav, yogurt thiab margarine tubs, cereal box liners, ib co medicine fwj. Kuj tseem siv rau hauv Tyvek rwb thaiv tsev, PEX piping, yas / ntoo composites.
Toxicity: Ua kom ruaj khov, nws feem ntau suav tias yog cov yas muaj kev nyab xeeb rau kev siv khoom noj thiab haus, txawm hais tias qee qhov kev tshawb fawb tau pom tias nws tuaj yeem ua rau cov kab mob endocrine cuam tshuam nonylphenol (ntxiv rau HDPE ua tus stabilizer), tshwj xeeb tshaj yog thaum raug ultraviolet lub teeb - piv txwv li, tshav ntuj - thiab tejzaum nws muaj lwm yam tshuaj additives nrog estrogen-mimicking kev ua si.
Recycling: Kwv yees li 29 feem pua. Cov khoom siv rov ua dua tshiab ua rau hauv lub raj mis rau cov khoom tsis yog khoom noj xws li tshuaj zawv plaub hau, tshuaj ntxhua khaub ncaws, roj cav; yas lumber thiab rooj tog, piping, recycling bins, fencing, pem teb vuas, thoob, crates, paj lauj kaub, vaj edging, zaj duab xis thiab sheeting.
4. Tsawg ntom polyethylene (LDPE)
Cov lus piav qhia: LDPE polymers muaj cov saw tseem ceeb ua suav nrog cov saw ntev thiab tsawg dua crystalline (muaj feem ntau thinner tau yooj yim dua ntawm polyethylene. Khoom: lub zog, toughness, yooj, tiv taus
ance rau noo noo, yooj yim ntawm sealing, yooj yim ntawm kev ua.
Hom Kev Siv: Feem ntau yog siv rau kev siv zaj duab xis xws li hnab (khoom noj khoom haus, tu qhuav, qhob cij, cov hnab ntim khoom noj khov, ntawv xov xwm, khib nyiab), hnab yas; coatings rau ntawv mis nyuj cartons thiab kub & txias dej khob; qee lub raj mis uas tau nyem tau ( zib ntab, mustard), cov thawv ntim khoom noj, lub hau ntim. Kuj tseem siv tau rau hlau thiab cable npog.
Toxicity: saib HDPE
Recycling Rate: Tsawg. Yooj yim rau rov siv dua. Cov khoom siv rov ua dua tuaj yeem ua rau hauv cov khib nyiab khib nyiab, vaj huam sib luag, yas lumber.
5. Polypropylene (PP)
Nqe lus piav qhia: Polypropylene yog siv rau cov ntawv zoo sib xws li polyethylene, tab sis feem ntau stiffer thiab kub resistant - yog li feem ntau yog siv rau cov thawv ntim khoom kub. Nws kuj muaj cov qauv tshuaj yooj yim (ntau pawg methyl ntawm CH3 - ib qho carbon thiab peb hydrogen molecules) ua rau nws muaj ntau yam. Nws yog crystallinity (cov qauv kev txiav txim cuam tshuam rau hardness & ntom) yog siab heev, qhov chaw ntawm LDPE thiab HDPE. Khoom: lub zog, toughness, tsis kam mus rau tshav kub, tshuaj, roj & roj, barrier rau ya raws.
Yam Khoom Siv: Cov thawv ntim khoom noj (ketchup, yogurt, tsev cheese, margarine, syrup, tshem tawm), ntim tshuaj, straws, lub kaus mom lub raj mis, Britta lim, Rubbermaid thiab lwm yam opaque yas ntim, nrog rau cov me nyuam lub raj mis. Lwm yam kev siv xws li cov ntaub qhwv pov tseg thiab cov ntaub so ntswg huv, cov tsho sov, cov khoom siv hluav taws xob thiab ntau lub tsheb (pob, ntaub pua plag, fixtures).
Toxicity: Ua kom ruaj khov, nws feem ntau suav hais tias yog cov yas muaj kev nyab xeeb rau kev siv khoom noj thiab haus, txawm hais tias nws tau pom tias muaj cov khoom siv yas ntxiv (xws li tus neeg sawv cev oleamide stabilizing) thaum PP labware tau siv rau hauv kev sim thiab ib qho kev tshawb fawb qub tau qhia. PP rhuab tuaj yeem txuas rau kev ua haujlwm hawb pob raws li qhov tshwm sim ntawm tus neeg ua haujlwm hauv PP lub Hoobkas.
Recycling Rate: Tsawg, vim tias feem ntau pigmented los yog tov nrog lwm cov resins, yog li nyuaj rau txheeb. Cov khoom siv rov ua dua tshiab ua rau cov txhuam hniav, txhuam hniav, cov khib nyiab pallets, nws pib roj teeb rooj, paj lauj kaub.
