Nce expalnation: formaldehyd

- Aug 17, 2018-

Formaldehyde (HCHO) yog ib qho tsis muaj xim, yooj yim soluble, roj ua kom muaj pa tsw qab. Formaldehyde tau absorbed los ntawm txoj hlab pas, thiab nws cov kua aqueous "formalin" tau absorbed hauv cov hnyuv.


Source: Formal boards xws li plywood, blockboard, nruab nrab ntog fiberboard thiab particleboard siv rau kho kom zoo nkauj sab hauv muaj formaldehyde. Vim hais tias formaldehyde muaj zog adhesion, nws kuj muaj lub luag hauj lwm ntawm kev ua kom muaj zog thiab tiv thaiv kab thiab tiv thaiv corrosion ntawm lub Rooj Tswjhwm Saib, yog li nws yog siv los coj los ua ke ntau cov nplaum xws li urea-formaldehyde resin, melamine, amine-formaldehyde resin, phenolic resin. . Lwm cov ntaub ntawv zoo nkauj uas muaj cov ntaub ntawv thiab muaj feem yuav tawm rau sab nraum lub ntiaj teb, xws li cov khoom siv ua ntej, cov phab ntsa, cov ntawv khov, cov ntaub pua plag, cov xim, cov xim thiab cov coatings uas siv cov tshuaj tua kab urea-formaldehyde. Tam sim no, lub urea-formaldehyde resin nrog formaldehyde raws li lub ntsiab tivthaiv siv nyob rau hauv cov khoom ntawm ntoo-based panels. Qhov residual thiab non-reactive formaldehyde nyob rau hauv daim ntawv yuav maj mam tso tawm mus rau ib puag ncig ib puag ncig, uas yog lub cev lub cev ntawm formaldehyde nyob rau hauv cov huab cua hauv tsev. Kho kom zoo nkauj thiab cov khoom siv sib xyaw ua ke tshiab yog qhov tseem ceeb ntawm formaldehyde pa phem.


Kev ruaj ntseg: Formaldehyde muaj cov kab mob cancerous thiab kev mob khees-nce. Ntau cov ntawv nyeem qhia tau hais tias cov teebmeem ntawm formaldehyde rau tib neeg kev noj qab haus huv feem ntau yog tshwm sim nyob rau hauv olfactory txawv txav, tsos mob, ua xua, tsis txawv txav ntsws ua haujlwm, txawv txav lub siab ua haujlwm thiab txawv txav tsis muaj zog. Qhov concentration nce mus txog 0.06-0.07 mg / m3 rau ib "cubic meter" ntawm cov pa, thiab mob asthma me me hauv cov menyuam yaus. Thaum lub formaldehyde cov ntsiab lus nyob rau hauv huab cua hauv tsev yog 0.1mg / m3, muaj tsw thiab tsis xis nyob; thaum nws nce mus txog 0.5mg / m3, nws tuaj yeem ua rau kom ob lub qhov muag thiab ua rau nws tearing; ncav 0.6mg / m3, nws ua tau rau mob caj pas tsis zoo los yog mob. Kev ua rau siab dua tuaj yeem ua rau xeev siab thiab ntuav, hnoos thiab hauv siab ceev, hawb pob thiab txawm pulmonary edema; thaum nws ncav 30mg / m3, nws yuav ua rau tuag sai.


Ntev ntev raug rau low-dose formaldehyde ntau dua teeb meem, ua rau mob ntsws mob ntev, ua rau mob cancer nas, mob plawv mob cancer, mob hlwb, kab mob hauv lub cev, kev hloov mus rau lub cev, DNA txuas ib leeg thiab hlwb DNA protein txuas Inhibition of DNA puas Kev kho mob, cev xeeb tub syndrome, ua rau cov chronic nosatal chromosomal abnormalities, leukemia, ua rau kev nco thiab puas siab puas ntsws poob rau cov hluas. Ntawm tag nrho cov kev sib cuag, cov me nyuam thiab cov poj niam cev xeeb tub thiab cov neeg laus yog tshwj xeeb tshaj yog nkag mus rau formaldehyde thiab raug mob ntau dua. Lub koom haum International Cancer tau pom zoo tias nws yog ib tus neeg mob carcinogen.