Recyclability, Food Safety & Siv piav qhia
Polypropylene, los yogPP,zaum ntawm kev sib tshuam ntawm practicality thiab controversy. Sau npe raws li kev rov ua dua tshiab #5, nws tshwm nyob rau hauv txhua yam los ntawm cov thawv yogurt mus rau qhov chaw tsheb. Txawm li cas los xij, txawm tias yog ib qho ntawm cov khoom tsim tau tshaj plaws hauv ntiaj teb no -tshaj 70 lab metric tons tsim txhua xyoo- nws ib puag ncig hneev taw tseem tsis to taub los ntawm cov neeg siv khoom nruab nrab. Cov lus nug tsis yog tsuas yog seb PP puas muaj kev nyab xeeb. Nws yog seb peb puas tau nug cov lus nug zoo txog nws txhua.
Dab tsi ua rau PP txawv
Polypropylene belongs rau tsev neeg polyolefin, ua ke los ntawm cov saw - loj hlob polymerization ntawm propylene monomers. Nws cov pob txha molecular - cov saw hlau hydrocarbon saturated nrog methyl pawg- muab nws cov tshuaj inertness zoo kawg li. Tsis zoo li PVC, uas yuav tsum tau cov yas yas uas tuaj yeem nkag mus rau hauv cov zaub mov, lossis polystyrene nrog nws cov khoom seem styrene monomers, PP tuav cov txheej txheem kev ncaj ncees yam tsis muaj kev phom sij ntxiv.
Ntawm no yog qhov uas nws tau nthuav. PP muaj qhov melting point nyob ib ncig ntawm 130-171℃nyob ntawm crystallinity, uas txhais tau tias nws yuav tsis deform nyob rau hauv ib txwm ua noj kub. Kuv tau pom cov ntaub ntawv qhia txog qhov twg PP ntim tau raug rau cov dej kub npau npau ntau zaus yam tsis muaj qhov ntsuas tau. Qhov ntawd tsis yog kev lag luam-uas yog polymer science.
Cov qauv crystalline tseem ceeb tshaj li cov neeg feem coob paub. Isotactic PP- qhov twg methyl pawg sib dhos ntawm ib sab ntawm cov saw hlau polymer- muab lub zog zoo dua thiab ua kom sov ua haujlwm piv rau atactic variants. Cov zaub mov lag luam feem ntau -qib PP yog cov isotactic heev, uas ib nrab piav qhia nws cov FDA clearance rau daim ntawv thov zaub mov.
Cov lus nug BPA (Thiab yog vim li cas nws tsis yog)
Txhua qhov kev sib tham yas thaum kawg rov qab mus rau BPA. Bisphenol A tau los ua tus boogeyman ntawm polymer chemistry tom qab kev tshawb fawb txuas nws mus rau endocrine cuam tshuam. Cov niam txiv ntshai. "BPA-dawb" daim ntawv lo tau nthuav dav. Tab sis ntawm no yog qhov khoom -PP yeej tsis muaj BPA thawj qhov chaw.
BPA yog siv hauv polycarbonate yas thiab epoxy resins. PP yog ib chav kawm sib txawv kiag li polymer. Nug seb PP muaj BPA zoo li nug yog tias koj lub tsho paj rwb muaj ntaub plaub. Lawv yog cov khoom siv sib txawv. Qhov tsis meej pem tshwm sim vim tias cov neeg siv khoom nkag siab ua ke tag nrho cov yas ua ke, tab sis cov chemistry tsis tuaj yeem sib txawv.
Koj PPmuaj peev xwmmuaj cov khoom siv ntxiv -antioxidants, UV stabilizers, clarifying agents. Khoom noj khoom haus-qib PP siv cov khoom siv ntxiv uas tau dhau los ntawm FDA qhov kev nyab xeeb, feem ntau ntawm cov ntsiab lus qis dua 0.1% los ntawm qhov hnyav. European Food Safety Authority (EFSA) tswj hwm cov qauv zoo sib xws raws li Txoj Cai (EU) No 10/2011.
Thaum tshav kub kub, microwave, thiab dab tsi tshwm sim tiag tiag
"Kuv puas tuaj yeem microwave PP?" Kuv tau txais cov lus nug no tas li. Cov lus teb luv luv: feem ntau yog. Cov lus teb ntev dua yuav nkag siab tias microwave -kev nyab xeeb txhais tau li cas.
Microwaves cua sov zaub mov, tsis yog lub thawv ncaj qha -tshwj tsis yog lub thawv nqus hluav taws xob microwave. PP feem ntau yog microwave- pob tshab. Cov teeb meem tshwm sim tsis yog los ntawm PP nws tus kheej tab sis los ntawm ob qhov xwm txheej: siab heev - cov zaub mov muaj roj uas ncav cuag qhov kub siab tshaj PP qhov muag muag, lossis cov thawv nrog cov xim hlau luam ntawv uas tuaj yeem ua rau arc.
Muaj ib tug caveat tsim nyog mentioning. Rov ua dua thermal cycling tuaj yeem ua rau cov saw hlau txuas ntxiv rau lub sijhawm. Kev txhais lus: koj li 5-xyoo- lub thawv ntim khoom qub tau muaj peev xwm ua kom muaj cua sov txaus los lav hloov. Tsis yog vim nws muaj tshuaj lom tam sim ntawd - kev tshawb fawb tsiv teb tsaws tsis txhawb qhov kev xaus-tab sis vim tias lub cev tsis zoo cuam tshuam rau kev ua haujlwm. Txhaum cov kab mob. Warping txhais tau tias cov ntsaws ruaj ruaj tsis zoo.
Roj teeb meem
Fat migration yog ib qho chaw uas PP qhia qhov tsis zoo. Cov roj kub tuaj yeem ua kom muaj kev hloov pauv ntxiv ntxiv -tsis yog PP polymer nws tus kheej, tab sis cov kab ua cov tshuaj. Cov kev tshawb fawb luam tawm hauv Food Additives & Contaminants tau sau cov ntaub ntawv ntsuas kev tsiv teb tsaws chaw thaum PP tiv tauj cov roj saum toj 100℃rau ncua sij hawm. Cov nyiaj tseem qis dua li kev cai txwv, tab sis lawv tsis yog -zero.
Kuv noj: tsis txhob khaws cov zaub mov kub, roj hauv PP rau lub sijhawm ntev. Cia lawv txias ua ntej. Nws yog qhov tsis yooj yim me me rau kev thaj yeeb ntawm lub siab.
Recyclability: Qhov Tseeb Tsis Txaus Siab
PP yog lub cim # 5 rov ua dua tshiab. Technically recyclable. Xyaum? Qhov xwm txheej yog grimmer tshaj li kev lag luam kev lag luam qhia.
Raws li EPA cov ntaub ntawv, PP cov khoom siv rov ua dua tshiab hauv Tebchaws Meskas hover ib ncig ntawm 1-3%. Muab piv rau PET lub raj mis ntawm kwv yees li 29%. Qhov tsis sib xws yog los ntawm kev sau cov txheej txheem, tsis yog cov khoom siv. Ntau lub nroog cov kev pabcuam rov ua dua tshiab tsuas yog tsis lees txais PP, lossis lawv lees txais tab sis thaum kawg muab pov tseg vim cov nqi ua haujlwm ntau dua tus nqi ntawm cov khoom siv nkauj xwb.
Qhov no yog kev ntxhov siab. PP yogmechanicallyrecyclable. Nws tuaj yeem rov ua dua rau hauv qis dua -qib daim ntawv thov- cov khoom siv tsheb, rooj tog vaj tog tsev, tsis yog - cov thawv khoom noj. Cov tshuab muaj nyob. Kev txhawb zog nyiaj txiag feem ntau tsis ua.
Kev siv tshuaj siv tshuaj rov ua dua tshiab muaj txoj hauv kev rau pem hauv ntej. Pyrolysis tuaj yeem tawg PP rov qab rau hauv hydrocarbon feedstocks. Ntau lub chaw tsav tsheb tau ua haujlwm hauv Tebchaws Europe thiab Asia. Seb cov scale no economically tseem tsis paub meej.
Piv rau Lwm Cov Plastics
Yog tias peb tab tom sib piv ib puag ncig cov ntaub ntawv, PP ua tau zoo dua ntau txoj hauv kev. Nws muaj kev tsim hluav taws xob qis dua li PET lossis polycarbonate. Nws tsis tas yuav chlorine hauv kev tsim khoom xws li PVC. Nws tsis tawm -gas styrene zoo li polystyrene.
Tab sis "zoo dua li PVC" yog qhov qis qis. Kev ntsuam xyuas ncaj ncees: PP yog ib puag ncig zoo dua ntawm cov khoom siv yas, tab sis nws tseem yog roj av- cov khoom tau los nrog qhov kawg - ntawm - kev nyuaj hauv lub neej. Hu nws "eco-tus phooj ywg" stretches lub ntsiab lus.
Kev siv tshuaj kho mob thiab menyuam mos
Cov tsev kho mob siv PP ntau heev. Cov koob txhaj tshuaj, IV hnab, cov thawv ntim khoom, cov khoom siv phais mob phais- cov polymer lub autoclavability thiab tshuaj tiv thaiv ua rau nws tseem ceeb. FDA cais PP raws li Chav Kawm VI kho mob - qib yas, qhov kev ntsuam xyuas biocompatibility siab tshaj.
Rau cov khoom me nyuam mos, PP tau hloov pauv polycarbonate ntau hauv cov me nyuam lub raj mis tom qab BPA txhawj xeeb. Feem ntau lub npe loj -Philips Avent, Dr. Brown's, Tommee Tippee- siv PP rau lub raj mis. Cov khoom tiv taus rov ua kom tsis muaj menyuam tsis muaj qhov hloov pauv lossis tshuaj lom neeg degradation.
Ib daim ntawv ceeb toom: "zaub mov-qib" thiab "kev kho mob- qib" tsis yog cov ntsiab lus sib hloov. Kev kho mob- qib PP raug kuaj ntxiv rau cytotoxicity, rhiab heev, thiab khaus khaus. Yog tias koj siv PP rau cov ntawv thov uas cuam tshuam nrog cov mucous membrane los yog cov ntaub so ntswg ntev, xyuas cov qib tshwj xeeb.
Nyeem Cov Ntawv Sau
Lub cim rov ua dua tshiab nrog "5" lees paub polypropylene. Tab sis qhov ntawd ib leeg tsis qhia txog kev nyab xeeb ntawm zaub mov. Tshawb nrhiav cov cim ntxiv: lub diav rawg-thiab- iav cim (EU kev sib cuag zaub mov), FDA 21 CFR nqe lus, lossis qhov ntsuas kub tshwj xeeb.
Qhov tseeb tuaj yeem yog qhov taw qhia ntxhib-txawm tias tsis zoo tag nrho. Clear PP feem ntau muaj cov tshuaj nucleating uas txhim kho kev zoo nkauj tab sis tsis cuam tshuam rau kev nyab xeeb. Opaque PP tej zaum yuav muaj tsawg dua additives. Xim tsis cuam tshuam rau kev nyab xeeb ntawm zaub mov; pigments yog nruj tswj hwm tsis hais xim.
Zam cov thawv ntim tsis muaj cim los ntawm qhov chaw tsis tau lees paub. Cov khw muag khoom duas thiab cov khw muag khoom ntshuam qee zaum nqa cov khoom PP yam tsis muaj ntawv pov thawj zoo. Cov khoom siv nws tus kheej yuav zoo, tab sis cov pob khoom ntxiv sib txawv ntawm cov chaw tsim khoom thiab cheeb tsam.
Daim Duab Loj
Peb tsis tuaj yeem rov ua dua peb txoj kev tawm ntawm kev vam khom yas. Qhov ntawd tsis yog defeatism-nws lees paub tias kev rov ua dua tshiab, rau PP lossis ib qho polymer, hais txog cov tsos mob ntau dua li qhov ua rau. Cov lus nug tsim nyog ntau dua suav nrog kev txo qis: peb puas xav tau ib qho - siv PP ntim rau cov khoom noj tam sim? Puas tuaj yeem rov siv tau lwm txoj hauv kev hloov pauv hauv qee daim ntawv thov?
PP tsis yog neeg phem. Tsis yog nws tus hero. Nws yog ib qho cuab yeej -ib qho uas ua tau zoo tshaj plaws hauv cov ntawv thov tshwj xeeb thiab tsis zoo hauv lwm tus. Siv nws rau lub thawv noj su uas tuaj yeem rov siv tau koj yuav khaws cia rau xyoo ua rau muaj kev nkag siab. Siv nws rau lub khob kas fes hau uas tau muab pov tseg hauv feeb tsis yog.
Cov ntaub ntawv tshawb fawb tau teeb tsa. PP, tsim thiab siv kom raug, muaj kev pheej hmoo rau kev noj qab haus huv tsawg. Cov lus nug ib puag ncig yog kev ua haujlwm, txuas ntxiv dhau ib qho polymer rau peb ua li cas, siv, thiab pov tseg cov ntaub ntawv feem ntau.
Yog li, Puas Muaj Kev Nyab Xeeb?
Yog, nrog caveats. Khoom noj khoom haus-qib PP los ntawm cov tuam txhab muaj koob npe, siv nyob rau hauv cov kev txwv kub, tsis muaj kev txhawj xeeb txog kev noj qab haus huv raws li cov pov thawj toxicological tam sim no. FDA, EFSA, thiab cov koom haum tswj hwm sib piv thoob ntiaj teb tau tshem nws rau daim ntawv thov kev sib cuag zaub mov tom qab kev sim ntau.
Puas yog eco- phooj ywg? Qhov ntawd nyob ntawm koj txhais. Nws yog recyclable nyob rau hauv txoj kev xav ntau dua li kev xyaum. Nws tsis muaj teeb meem tsawg dua li ntau txoj hauv kev. Nws tseem yog pob txha- roj- cov khoom tau muab los ua rau cov teeb meem yas dav dav.
Ua cov kev xaiv paub. Siv PP qhov uas nws ua rau kev txiav txim siab- cov khoom siv tau ruaj khov, kev siv kho mob, kev cia khoom noj uas yuav tsum tau ua kom sov. Nug nws qhov tsim nyog rau cov khoom pov tseg. Thiab tsis txhob poob pw tsaug zog tshaj lub thawv yogurt hauv koj lub fridge. Ntawm txhua yam tsim nyog txhawj txog, qhov ntawd tej zaum tsis yog nws.