Lonke ulwazi olungaphakathi kweli candelo lilandelayo “loKukhutshwa” liqokelelwa kwi-EWPAA: Inqaku loBugcisa, ukukhutshwa kweFormaldehyde evela kwiPlywood kunye neLaminated Veneer Lumber.
Eli candelo libhekiselele kuvavanyo oluqhubekayo kushishino olubanzi lwe-formaldehyde ekhutshwayo evela kwiimveliso ezinophawu lwe-EWPAA, ishwankathela uphando olugqitywe yi-EWPAA yokuba izinto ezikhutshwayo ezivela kwiimveliso zoHlobo lwe-A eziBondezwe, ezinento ezincamathelayo ze-phenolic, zimele ngaphezulu kwe-90% yemveliso ye-EWPAA ekhutshiweyo ngokufanelekileyo.
I-formaldehyde
I-Formaldehyde yirhasi engenambala, enuka ngamandla eyenzeka ngokwendalo ngaphakathi kokusingqongileyo kwaye ikhutshwa ziinkqubo ezinjengokubola, ukutsha kunye nendalo yazo zonke iindidi zamaplanga.
Ukukhutshwa kwe-formaldehyde
IPlywood iveliswa kwiintlobo ezimbini zokuncamathelisa ezisisiseko: iPhenol Formaldehyde (PF) kunye neplastiki yeamino, equka iMelamine Urea Formaldehyde (MUF) kunye neUrea Formaldehyde (UF).
Kukho umahluko omkhulu kwikhemikhali phakathi kweentlobo ezimbini zokuncamathelisa. Ngeemveliso ezibophelelwe yi-PF, emva kokuba nayiphi na inqanaba eliphantsi le-formaldehyde elishiyekileyo kwinkqubo yokuvelisa liye lachithwa kwiintsuku ezimbalwa, azikhuphi i-formaldehyde.
Ukuncamatheliswa kwe-PF, okuphawulwa ngombala wayo omnyama, kubizwa ngokuba yi-Type A phantsi kwemigangatho ye-plywood yase-Australia kunye ne-New Zealand njengoko isetyenziswa ekwenzeni i-plywood eyakhiweyo, iimveliso zeplywood zaselwandle zangaphandle (uHlobo A).
Kuzo zombini iYurophu kunye ne-United States, iimveliso ezibotshelelwe kwiingcina ze-PF zihlelwa njengezingakhuphi kwaye azikhutshiwe kwimimiselo yokukhupha i-formaldehyde.
Iimveliso ezibotshelelwe ngeplastiki ye-amino zikholisa ukuba namanqanaba aphezulu ashiyekileyo e-formaldehyde kwaye zinokukhupha amanqanaba aphantsi e-formaldehyde.
Inqaku loBugcisa lokuqukumbela
Ukukhutshwa kwe-formaldehyde evela kwiimveliso eziqinisekisiweyo ze-EWPAA zingaphantsi kakhulu kwemida eyamkelekileyo yokuvezwa echazwe yiWorkplace Australia kwaye ayibangeli mngcipheko kwimpilo.
Iiklasi zokukhutshwa kwe-formaldehyde kwiMigangatho yase-Australia/ yaseNew Zealand zinkcukacha kule theyibhile ingezantsi. Iimveliso ezibhalwe ngeeklasi zokukhupha i-E0 kunye ne-E1 zinokukhutshwa okuphantsi kakhulu kwe-formaldehyde.
UDidi lokuPhuma kuMda wokuPhuma weFormaldehyde (mg/l) uMda wokuPhuma weFormaldehyde (ppm)*
Super E0 Ngaphantsi okanye ilingana no 0.3 Ngaphantsi okanye ilingana no 0.024
E0 Ngaphantsi okanye ilingana no-0.5 Ngaphantsi okanye ilingana no-0.04
E1 Ngaphantsi okanye ilingana no 1.0 Ngaphantsi okanye ilingana no 0.08
Ixesha lokuposa: Oct-19-2021