초산비닐 수지 에멀젼접착제를 사용한 푸라타나스의 판재접착성

소원택 한국목재공학회 1983 목재공학 Vol.11 No.5

This research was performed to investigate the gluing characteristics of platanus (Platanus occidentalis L.) lumber glued with polyvinyl acetate resin emulsion adhesives. According to the results, the optimum gluing conditions for platanus lumber were as follows: the amount of spreading glue, assembly time, pressure, and pressing time were respectively 200 g/㎡, 20min, 10 ㎏/㎠, and 10 hrs. There was highly significant correlation between the addition ratio(x) of urea resin to PVAc emulsion and the block shear strength(Y), and the regression equations were respectively as follows: in dry test Y=56.898+0.531x and in wet test Y=17.293+0.432x. The maximum bending strength and Young's modulus of two-ply parallel grained panels were respectively 782.5 ㎏/㎠ at the addition ratio of urea resin 40% and 89.4 x 103 ㎏/㎠ at 50%, which were higher than those of solid lumber.

국산재(國産材) 곡목가구(曲木家具) 제조(製造)를 위한 Microwave-heating System 활용(活用)에 관한 연구(硏究)(II) - Microwave-heating에 의한 서어나무의 소재(素材) 휨가공특성 -

소원택,So, Won-Tek 한국목재공학회 1983 목재공학 Vol.11 No.2

Hornbeam trees(Carpinus laxiflora BL.) are growing in Korea and have good characteristics such as relatively high density, fine texture, split-resistance, and white colour. However, they have seldom been used as manufacturing materials This study was carried out to evaluate the possibility of using hornbeam wood as bent-wood furniture materials. Softening methods were steaming and micro-wave heating. The specimens of $15{\times}15{\times}350mm$ were used green or air-dried, and were steamed at $100^{\circ}C$ for 20min, or microwave heated for 60 seconds. The bending processing conditions are showed in Table 3. The minimum solid-bending radii of air-dried wood were 40mm for steaming and 200mm for micro-wave heating, respectively. And that of green wood were 40mm for micro-wave heating. In conclusion, both of the steamed wood and micro-wave heated green wood showed very good solid bending processing properties, but micro-wave heated air-dried wood were not sufficient for bent-wood furniture.

못접합에 의한 내부천공이 삭편판(PB)의 휨강도에 미치는 영향

소원택 한국가구학회 2008 한국가구학회지 Vol.19 No.3

This experiment was carried out to investigate the effect of internal holes on the bending strength of PB. The diameters of holes are 0mm to 13mm. The locations of holes are 1/8 to 4/5 point horizontally from sample end and are 1/5 to 4/5 vertically from sample surface, the numbers of holes are 1 to 4 pcs. In the size of internal holes, the bending strengths of PB were decreased significantly with the increase of diameter of holes, and the relationship between diameters(D) of holes and bending strength(σb) of PB was σb=-11D+168.8 (r2=-0.99**). The effects of hole-locations and hole-numbers on the bending strengths of PB were large. and so they should be considered as major facters for the jointing design of PB.

고주파 평면가열에 의한 중밀도섬유판(MDF)의 핑거접합

소원택,So, Won-Tek 한국가구학회 2006 한국가구학회지 Vol.17 No.2

This experiment was carried out to investigate the high-frequency gluing characteristics of poly vinyl acetate emulsion adhesive(PVAc) on MDF edge-glued boards. The edge-glued boards were glued lengthwise with butt, scarf, or finger joint. The wastes of MDF boards were reused as board materials. The obtained results are summarized as follows; the bending strength of edge-glued MDF increased slightly with the HF heating time, but the economically desirable heating time was 6 minutes. The bending and tensile strength of edge-glued MDF were high with scarf, finger and butt joint, in order. The strength of finger jointed MDF showed 80% of scarf jointed MDF. The effects of location of finger joints on the bending strength of edge-glued MDF were larger than those of the numbers of finger joints. The bending strength of edge-glued MDF with one joint on the middle position showed 40% decrease in comparison with non-jointed MDF.

핑거접합방식에 의한 삼나무의 고주파가열 집성판 제조에 관한 연구 (1) - 삼나무 판재의 초산비닐수지 접착특성 -

소원택,채정기,So Won-Tek,Chai Jyung-Ki 한국가구학회 2005 한국가구학회지 Vol.16 No.1

This experiment was carried out to investigate the gluing characteristics of poly vinyl acetate emulsion adhesive(PVAc) on the Cryptomeria japonica laminated boards. This sample trees are major planting species and have been planted in southern district for a long time. The optimum gluing conditions for laminated board were summarized as follows; the amount of spreading glue, assembly time, clamping pressure, and clamping time for PVAc resin were $200g/m^2$, 10min., $5kg/cm^2$, and 6hrs., respectively, and the relative formulae between extension ratio(x) and block shear strength(y) was $y=-9.6x+85.2(R^2=0.95)$.

건조전 선별에 의한 Southern pine 재의 고온건조

소원택,Taylor, Fred W 한국목재공학회 1992 목재공학 Vol.20 No.2

This study was performed to investigate the effect of green sorting before drying on the high-temperature drying characteristics of southern yellow pine dimension lumber(2$quot;×6$quot;×12'). To test the advantages of weight sorting, green lumber was seperated into heavy(above 55 1b), medium(50-55 1b), and light(below 50 1b)weight classes. Pieces in each weight class were subgrouped into high(above 35%) and low(below 30%) latewood groups. Groups were dried and seperated by a standard commercial high-temperature schedule ; dry bulb temperature 245°F, wet bulb temperature 180°F, and all velocity 1200fpm. The results obtained were as follows : 1. There was a highly significant correlation between annual rings per inch(X) and percent-latewood(Y). The regression equation was Y-=24. 5047+1.3272X. 2. There were highly significant correlations between either annual rings per inch(X₁) or percent-latewood(X₂) a.d specific gravity in green wood(Y). Their regression equations were Y=0.4260-1-0.0081X₁ and Y=0.3749+0.0029X₂, respectively. 3. Heavier weight charges dried more slowly than lighter weight charges. 4. Board-to-hoard variation in green or dry moisture content was less for all seperate weight classes than for unseperated control charges. 5. Lower latewood pieces had higher initial moisture content than higher latewood pieces, and then drying time for lower latewood pieces was longer than higher latewood pieces.

양버즘나무의 素材 및 集成曲木製造에 關한 硏究(Ⅱ) : -蒸煮에 의한 集成휨加工性-

蘇元澤 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-

This study was carried out to investigate laminated-wood bending properties of plane trees(Platanus occidentalis Linn)grown in Korea and then to develop their end -uses for the replacement of imported wood by domestic wood as industrial timber. The size of bent-wood specimens tested was 15X15X350mm, and the depth of laminar was respectively 2.0mm, 3.0mm, 5.0mm and 7.5mm for steaming treatment. The specimens were dried to 15±1% before bending. The results obtained were as follows : 1. By steaming treatment, the minimum laminated bending radius of 2mm, 3mm, 5mm, and 7.5mm thick laminar was 5mm,10mm, 40mm, and 90mm respectively. 2. The spring back of bent-wood was very slight. The bending stress was setted successfully both through room temperature and 80℃ C-15hrs drying after bending, but the bent-wood by 80℃-setting showed slightly negative spring back. 3. The M.O.R. and M.O.E. of bent-woods were both Improved as the thickness of their laminars decreased and their loss of bending strength was higher in the concave side than in convex side of loading direction.

내부천공이 중밀도 섬유판(MDF)의 종압축강도에 미치는 영향

蘇元澤 전남대학교 농업과학기술연구소 2000 農業科學技術硏究 Vol.35 No.-

This experiment was carried out to investigate the effect of internal holes on the compressive strength parallel to the grain of MDF. The diameters of holes are 5mm to 21mm, the locations of holes are 1/2 to 1/5 point from sample ends, and the numbers of holes are 1 to 4 pcs. In the size of internal holes, the compressive strengths of MDF were decreased significantly with the increase of diameter of holes, and the relationship between diameters(D) of holes and compressive strength(σc) of MDF is σc=-5.26D+144.39, (r=-0.99**). The effects of hole-locations on the compressive strengths of MDF were very small. The compressive strengths of MDF were decreased with the increase of number of holes, but the decreasing rate were very small.

요소 및 페놀-리졸시놀 공축합수지에 대한 리기다소나무의 판재접착성

소원택 全南大學校 農漁村開發硏究所 1988 農業科學技術硏究 Vol.23 No.-

This experiment was carried out to investigate the gluing cteristics of urea and phenol-resorcinol resin adhesives on the pitch pine lumber. According to the results, the optimum gluing conditions for pitch pine lumber were as follows : moisture content, the amount of spreading glue, assembly time, clamping pressure, and clamping time were respectively 12%, 300g/m², 30min., 10kg/㎠ and 12hrs. for urea resin adhesives, and 8%, 250g/㎡, 20min, 10kg/㎠, and 12hrs. for phenol-resorcinol resin adhesives.

해외목재자원 및 이용 - I. 파푸아 뉴기니아 (PAPUA NEW GUINEA)

소원택,윤여창,김외정,So, Won-Taek,Yun, Yeo-Chang,Kim, Oe-Jeong 한국목재공학회 1980 목재공학 Vol.8 No.4