Plywood muaj qee qhov nyiaj ntawm formaldehyde, vim tias cov txheej txheem tsim cov plywood siv ntau cov kua nplaum urea-formaldehyde resin kua nplaum, raws li cov tshuaj sib xyaw ua ke ntawm formaldehyde resin kua nplaum yuav tsum tau nrog formaldehyde, lub thiaj li hu ua ib puag ncig tiv thaiv tsuas yog tus nqi ntawm formaldehyde. cov ntsiab lus.
Plywood yog cov khoom siv feem ntau hauv kev kho vaj tsev. Plywood yog ua los ntawm ntoo shavings thiab urea formaldehyde resin pressurized ua ke. 12 cm plywood feem ntau yog ua los ntawm 3-4 cov khaubncaws sab nraud povtseg ntawm ntuj ntoo chips, txhua txheej ntawm ob-sided roller kua nplaum thiab ces kub nias, tag nrho cov board siv li 3 kg ntawm kua nplaum. Yog tias muaj cov tshuaj lom xws li formaldehyde lossis cyanide hauv cov kua nplaum siv hauv lub rooj tsavxwm, ces cov phaj uas nws tsim muaj tshuaj lom, thiab yog tias koj siv cov laug cam los ua cov rooj tog zaum, cov rooj tog zaum no yuav muaj tshuaj lom. Yog li ntawd, cov khoom ua los ntawm plywood yuav emit ib tug me me ntawm formaldehyde. Cov khoom tshiab tso tawm cov formaldehyde tshaj plaws, thiab ntev dua lawv siv, lawv tsis hnov tsw, tab sis lawv siv sijhawm ntau xyoo los ua kom tsis muaj zog.
Tau kawg, thaum xaiv plywood, nws tsuas yog nyob ntawm nws qhov kev tso tawm formaldehyde thiab gluing lub zog, yog tias lub zog gluing ntawm cov plywood tsis zoo, nws yog ib qho yooj yim kom poob tawm Txawm tias cov plywood yog ib puag ncig zoo nyob ntawm cov ntsiab lus formaldehyde hauv cov kua nplaum. Ntawm lawv, muaj peb yam tseem ceeb ntawm cov kua nplaum ib puag ncig: E{{0}}, E1 thiab E2. Cov ntsiab lus formaldehyde ntawm E0 kua nplaum yog qhov qis tshaj, cov ntsiab lus formaldehyde hauv E0 kua nplaum tsis ntau tshaj 0.5mg/ml hauv CARB P1 theem, thiab cov ntsiab lus formaldehyde hauv E 0 kua nplaum tsis ntau tshaj 0.3mg/l hauv CARB P2 theem; Cov ntsiab lus formaldehyde hauv E1 kua nplaum tsis ntau tshaj 1.5mg / l; Cov ntsiab lus formaldehyde hauv E2 kua nplaum tsis ntau tshaj 5mg / l; Yog li ntawd, yog tias koj xav tau ib puag ncig tus phooj ywg plywood, sim xaiv E0, E2 kua nplaum, tshwj xeeb tshaj yog rau xa tawm mus rau Tebchaws Meskas thiab Europe.
Nyob rau tib lub sijhawm, thaum yuav cov rooj tog zaum, sim xaiv cov ntoo es tsis txhob ntawm cov plywood. Lub plywood nws tus kheej yog ib qho yooj yim los txheeb xyuas, raws li cov shavings nias ua ke tuaj yeem pom ntawm txhua sab, tab sis nws yuav nyuaj rau pom thaum nws tau ua rau hauv rooj tog, vim nws feem ntau muab zais tom qab ntawm daim tawv nqaij ntawm cov ntoo thiab yuav tsum tau ua tib zoo tshuaj xyuas, feem ntau yog nyob rau hauv cov pob qij txha thiab qhov twg cov qhov drilled. Cov rooj tog uas hais tias yog ua los ntawm cov ntoo tiag tiag feem ntau muaj plywood muab zais rau hauv.
