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F/U몰비의 변이가 UF Resin과 목질 Composite의 방출에 미치는 영향
박헌(Heon Park),유영삼(Young Sam You),강은창(Eun Chang Gang) 한국가구학회 1998 한국가구학회지 Vol.9 No.1
This study was conducted in order to measure formaldehyde emission with the passing of time from plywood, parricleboard-1 and parricleboard-2 bonded with urea-tormaldehyde resin.<br/> The six kinds of UF resins were manufactured with formaldehyde/urea molar ratio 1.0, 1.2, 1.4, 1.6, 1.8 and 2.0. The boards were made of three kinds of raw materials; veneer, particle-1 and particle-2. Formaldehyde emission contents were measured at 1,3,7,15, and 30 days after boards were manufactured.<br/> The results were as follows:<br/> I. Free formaldehyde content in UF resins increased greatly with increasing of F/U molar ratio. Free formaldehyde contents increased 86.3%, 250%, 547%, 983%, 1600% in F /U molar rano 1.2, 1.4, 1.6, 1.8, 2.0, respectively, compared to that in F /U molar ratio 1.0<br/> 2. The plywoods manufactured with UF resins of 1.0, and 1.2 molar ratios satisfied the KS formaldehyde emission limit of 5 mg/ I directly after manufacturing. The plywood with F /U molar ratio 1.4 satisfied KS limit of 10mg/ I only in 30 days.<br/> 3. The particleboard-1 and particleboard-2 satisfied the formaldehyde emission limit of KS standard U type with 1.0, 1.2 molar ratio. The particleboards manufactured with the other molar ratios 1.4, 1.6, 1.8, 2.0 didn't satisfy. KS standard U type in 30 days.<br/> 4. The amount of formaldehyde emission were not strongly dependent on their period of emission after the manufacture of board, but dependent on their molar ratio. The types of raw material differently showed different their emission rate and pattern.<br/> Keywords: FormaldehydejUrea Molar Ratio, Formaldehyde Emission, Free Formaldehyde Content, Wood Composite.<br/>
제조조건과 F/U몰비를 달리한 파아티클보드의 시간의 경과에 따른 포름알데히드 방출에 관한 연구
박헌(Heon Park),유영삼(Young Sam You) 한국가구학회 1998 한국가구학회지 Vol.9 No.2
This study was to measure formaldehyde emission according to the passing of time from particleboards bonded with Urea-Formaldehyde resin, which was made of three different for maldehyde/urea molar ratios 1.2, 1.4, and 1.6. The particleboard was made of sliver type particle and two different manufacturing conditions: Laboratory and Factory Manufacturing Condition. Formaldehyde emission values were measured at 1, 3, 7, 15,30, 90days after board manufactured.<br/> The results were as follows:<br/> 1. Amount of Factory- Particleboard(FPB) formaldehyde emission was showed higher than Laboratory Particleboard(LPB). However, formaldehyde emission pattern of FPB was similar to LPB.<br/> 2. The LPB with FlU molar ratio 1.2 resin satisfied the KS ~ standard(5 mg/l) (KS F 3104 Classification of Formaldehyde emission) directly and steadily after manufacturing. However, FPB with 1.2 resin satisfied KS ~ standard only in 30 days.<br/> 3. The LPB with FlU molar ratio 1.4 resin barely satisfied KS ~ standard in 90 days. The FPB with 1.4 resin didn't satisfY KS E, standard in 90 days.<br/> 4. The LPB and FPB with FlU molar ratio 1.6 resin both didn't satisfied KS E, standard in 90 days.<br/> <br/> Keywords: Formaldehyde/Urea Molar Ratio, Formaldehyde Emission, Particleboard, Laboratory Manufacturing Condition, Factory Manufacturing Condition.<br/>
장기노출된 목질 Composite의 포름알데히드 방출에 미치는 F/U 몰비의 영향
劉永三,朴憲 건국대학교 자연과학연구소 1999 建國自然科學硏究誌 Vol.10 No.1
This study was to measure formaldehyde emission with the passing of long time from plywood, sliverparticleboard and strandparticleboard bended with Urea-Formaldehyde resin made of different F/U molar ratios. The Urea-Formaldehyde resin was manufactured six kinds of formaldehyde/urea molar ratio 1.0, 1.2, 1.4, 1.6, 1.8 and 2.0. The boards were made of three kinds of different kind raw materials; veneer, sliverparticle and strandparticle. Formaldehyde emission values measured at 90, 150, 250 days after beard manufactured were compared. The results were as follows: 1. The plywood manufactured with molar ratio 1.6 satisfied the KS formaldehyde emission limit of 10mg/l in 250 days. But, the plywoods with molar ratios 1.8, 2.0 didn't satisfy the KS formaldehyde emission limit of 10mg/l in 250 days. 2. The sliverPB with molar ratio 1.4 satisfied KS standard E_2 type in 150 days. The sliverPB with molar ratio 1.6 satisfied KS standard E_2 type in 250 days. But the sliverPBs with molar ratios 1.8 and 2.0 didn't satisfy KS standard E_2 type in 250 days. 3. The strandPB with molar ratios 1.4 and 1.6 satisfied KS standard E_2 type in 250 days. But strandPB with molar ratios 1.8, 2.0 didn't satisfy KS standard E_2 type in 250 days.
제조 후 1년 경과된 Strand/Sliverr Particleboard의 F/U 몰비별 Formaldehyde 방출량에 관한 연구
朴 憲,劉永三 건국대학교 자연과학연구소 1999 建國自然科學硏究誌 Vol.10 No.2
This study was conducted in order to measure formaldehyde emission with the passing of one year from particleboard(two kinds of raw material's shape - sliver and strand) bonded with Urea resin which was made of different F/U molar ratio. The Urea resin was manufactured six kinds of Formaldehyde/Urea molar ratio 1.0, 1.2, 1.4, 1.6, 1.8 and 2.0. Formaldehyde emission values were compared at 1, 3, 7, 15, 30, 90, 150, 250, and 365 days after board manufactured. The results were as follows : 1. I year after board manufactured, both Sliver and Strand Particleboard satisfied the emission limit (E₂: 5㎎/ℓ - F3140 classification) of KS standard with 1.0, 1.2, 1.4 and 1.6. 2. The Partidcleboards with F/U molar ratio 1.4 and 1.6 satisfied E2 limit only in 150 days and 365 days respectively. 3. Formaldehyde emission amount of Sliver Particleboard was similar to Strand Particleboard depended on each F/U molar ratio. However, the formaldehyde emission pattern was influenced with the shape of raw materials(particle shape).