Kev tsim pwm MDF
Aug 16, 2019
Nruab nrab-ntuag cov fibreboard ( MDF) yog ib qho engineered ntoo khoom tsim los ntawm kev zom zom hardwood lossis softwood residuals rau hauv wood fibers, feem ntau nyob rau hauv a defibrator , sib txuas nws nrog siv quav ciab thiab a cov ntawv sau kab ntawv, thiab cov qauv tsim los ntawm kev thov siab kub thiab siab . MDF feem ntau yog denser dua plywood . Nws yog tsim los ntawm kev sib cais ua cov fibers, tab sis tuaj yeem siv ua cov khoom siv hauv tsev zoo ib yam hauv daim ntawv thov rau plywood. Nws yog qhov muaj zog ntau dua thiab ntau dua particle board .
Lub npe derives los ntawm qhov uas txawv hauv densities ntawm fibreboard . Kev tsim khoom loj ntawm MDF tau pib thaum xyoo 1980, hauv Asmeskas North thiab Europe
Ua haujlwm dhau sijhawm, lub sijhawm MDF tau dhau los ua cov npe nrov rau txhua cov txheej txheem qhuav fiber ntau lub rooj tsavxwm . MDF ib txwm muaj li ntawm 82% wood fiber ntau , 9% kua nplaum urea-formaldehyde kua nplaum, 8% dej thiab 1% paraffin siv quav ciab . thiab qhov ntom ntuag yog li ntawm 500 kg / m 3 (31 lb / ft 3 ) thiab 1,000 kg / m 3 (62 lb / ft 3 ). Qhov ntau ntawm qhov ntom thiab kev faib tawm raws li lub teeb , txuj , lossis kev kub ceev lub rooj tsav xwm yog qhov tsis meej thiab tsis meej pem. Qhov ntom ntom ntom ntom ntom ntom ntom lub sijhawm, thaum ntsuas qhov txheeb ze rau qhov ntom ntom ntom ntom ntom ntom ntom mus ua qhov vaj huam sib luag, tseem ceeb heev. Lub laj kab MDF tuab ntawm qhov ntom ntawm 700 - 720 kg / m 3 tuaj yeem suav ua qhov siab ntom ntom ntom ntawm qhov muag muag ntoo fiber ntau, hos ntawm cov vaj huam sib luag ntawm tib lub ntom ua los ntawm cov ntoo ua tawv tawv tsis suav hais tias yog li. Cov kev hloov pauv ntawm ntau hom MDF tau tsav los ntawm kev xav tau txawv rau cov kev siv tshwj xeeb.
