Puas tau khaws ib yam khoom ua si yas muaj yeeb yuj thiab xav paub tias muaj dab tsi ua rau nws tsis tawg? Tej zaum, nws yog ua los ntawm PVC—ib yam yas uas siv ntau heev hauv cov khoom ua si rau menyuam yaus, txij li cov khoom ua si da dej roj hmab mus txog rau cov khoom siv ua vaj tse ruaj khov. Tab sis ntawm no yog qhov teeb meem: PVC nws tus kheej yog qhov ua teeb meem me ntsis. Nws yooj yim tawg thaum nws sov (xav txog kev caij tsheb hnub ci lossis tsuas yog ua si nrog ntau yam) thiab tso tawm cov tshuaj lom neeg phem hauv cov txheej txheem. Qhov ntawd yog qhov uas "stabilizers" tuaj yeem koom nrog. Lawv zoo li cov neeg pab uas ua rau PVC muaj zog, yoog tau, thiab zoo.
Tiamsis tsis yog txhua yam khoom ruaj khov tau tsim zoo ib yam. Thiab thaum nws los txog rau cov khoom ua si rau menyuam yaus, "tsis muaj tshuaj lom" tsis yog lo lus nrov xwb - nws yog ib qho tseem ceeb.
Cov Menyuam Ua Si Txawv (Thiab Qhov ntawd tseem ceeb)
Cia peb ua qhov tseeb: cov menyuam yaus tsis ua zoo rau cov khoom ua si. Lawv tom lawv, ntws qaub ncaug rau lawv, thiab txhuam lawv thoob plaws lawv lub ntsej muag. Yog tias cov khoom ua si stabilizer muaj cov khoom phom sij xws li txhuas, cadmium, lossis qee yam tshuaj lom neeg hnyav, cov tshuaj lom ntawd tuaj yeem tawm los - tshwj xeeb tshaj yog thaum cov yas hnav lossis sov.
Cov me nyuam lub cev muaj kev rhiab heev rau cov tshuaj lom no. Lawv lub hlwb thiab cov kab mob tseem tab tom loj hlob, yog li txawm tias me me xwb los kuj tuaj yeem ua rau muaj teeb meem loj: xav txog kev ua pob khaus ntawm daim tawv nqaij, mob plab, lossis qhov phem dua, teeb meem mus sij hawm ntev nrog kev loj hlob. Cov tshuaj stabilizers uas tsis muaj tshuaj lom? Lawv hla cov khoom phem, yog li koj tsis tas yuav txhawj txog dab tsi tawm thaum koj tus menyuam yaus tom lawv cov khoom ua si uas nyiam.
It'Tsis Yog Hais Txog Kev Nyab Xeeb Xwb—Cov Khoom Ua Si Siv Tau Ntev Dua Thiab
Cov tshuaj stabilizers uas tsis muaj tshuaj lom ua ntau yam ntxiv tsuas yog ua rau cov menyuam yaus muaj kev nyab xeeb xwb—lawv ua rau cov khoom ua si zoo dua. PVC uas muaj cov tshuaj stabilizers zoo nyob kaj thiab muaj yeeb yuj (tsis muaj daj tom qab ob peb lub hlis), nyob ywj pheej (tsis muaj tawg thaum khoov), thiab tuav tau thaum ua si tsis ruaj khov. Qhov ntawd txhais tau tias cov khoom ua si uas koj tus menyuam nyiam hnub no yuav tsis hloov mus ua qhov tsis zoo, ploj mus rau lub hlis tom ntej.
Puas tau pom tias qee cov khoom ua si yas ntshiab ua rau cov khoom ua si tsis zoo li qub? Xam tias yog cov tshuaj stabilizer tsis zoo. Cov uas tsis muaj tshuaj lom, xws li calcium-zinc lossis barium-zinc sib xyaw, ua rau PVC zoo nkauj thiab tshiab, txawm tias tom qab da dej, rub, thiab poob ntau zaus lawm los xij.
Yuav ua li cas thiaj nrhiav tau cov khoom zoo
Koj tsis tas yuav muaj daim ntawv kawm tiav qib siab txog kev tshawb fawb los xyuas seb cov khoom ua si puas muaj kev nyab xeeb. Tsuas yog tig nws thiab luam theej daim ntawv lo:
Tsis txhob ua cov cim liab no: Cov lus zoo li "ua tus thawj coj, ”cadmium,” lossis “organic tin” (ib hom tshuaj lom stabilizer) yog cov cim ceeb toom.
Nrhiav cov teeb ntsuab noCov lus zoo li "tsis muaj tshuaj lom," "tsis muaj txhuas," lossis "ua tau raws li EN 71-3" (tus qauv kev nyab xeeb hauv Tebchaws Europe) txhais tau tias nws tau raug sim lawm.
Cov hom stabilizer muaj kev nyab xeeb: “Calcium-zinc" los yog "barium-zincCov tshuaj stabilizers yog koj cov phooj ywg - lawv ua tau zoo rau kev ua kom PVC muaj zog tab sis mos rau cov menyuam yaus.
Cov Lus Qhia Tseem Ceeb
Thaum nws los txog rau cov khoom ua si rau menyuam yaus, "PVC stabilizer uas tsis muaj tshuaj lom"tsis yog ib lo lus zoo nkauj xwb." Nws yog hais txog kev ua kom koj tus menyuam muaj kev nyab xeeb thaum lawv ua si, thiab xyuas kom lawv cov khoom ua si nyiam nyob ib puag ncig rau txhua lub sijhawm tsis zoo thiab zoo kawg nkaus."
Lub sijhawm tom ntej koj mus yuav khoom ua si, siv sijhawm me ntsis los xyuas daim ntawv lo. Koj tus menyuam yuav ua tsaug rau koj (nrog tsawg dua qhov kev puas tsuaj rau cov khoom ua si tawg) thiab koj yuav so kom yooj yim dua thaum paub tias lawv lub sijhawm ua si muaj kev nyab xeeb thiab nws lom zem.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-22-2025