• 한국가구학회지
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• 제28권1호
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• pp.53-59
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• 2017

Wooden dowels are commonly used to join the particleboard members together in many types of structures, But little information is available concerning their holding properties in domestic particleboard. This study was performed to determine the withdrawal loads and strengths on the effect of diameter of dowel and hole clearance. The test block was manufactured from 15 mm thick domestic particleboard. The dowel was manufactured 6, 8 and 10 mm diameters from korean castanea, korean pine and tuliptree. Research reported here indicates that withdrawal loads increase, but withdrawal strengths decrease, as the dowel diameter increases. This study also indicates that dowel withholding load and strength for particleboard less decrease than those for domestic wood as a hole clearance decreases.

• Journal of the Korean Wood Science and Technology
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• 제19권4호
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• pp.43-51
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• 1991

This study was carried out to determine the withdrawal strength of various screws according to root diameter of screw and embeded length on the face and edge of domestic particleboard and medium density fiberboard. The obtained results were as follows: 1. The withdrawal strength of screw in domestic particleboard and medium density fiberboard was closely related to embeded length of the screw but less dependent on root diameter of the screw. 2. The withdrawal strength on the face and edge of domestic particleboard could be predicted by means of the following expression: $F_{Pf}=4.60{\times}D^{0.24}{\times}L^{1.14}(R^2=0.87)$ $F_{Pe}=0.54{\times}D^{0.43}{\times}L^{1.73}(R^2=0.84)$ Where: $F_{Pf}$ : withdrawal strength on the face of particleboard(kgf) $F_{Pe}$=withdrawal strength on the edge of particleboard(kgf) D=diameter of the screw(mm) L=embeded length(mm) 3. The withdrawal strength on the face and edge of domestic medium density fiberboard could he predicted by means of the following expression: $FM_f=1.53{\times}D^{0.53}{\times}L^{1.39}(R^2=0.93)$ $F_{Me}=1.14{\times}D^{0.66}{\times}L^{1.36}(R^2=0.87)$ where: $F_{Mf}$ = withdrawal strength on the face of medium density fiberboard(kgf) $F_{Mf}$=withdrawal strength on the edge of medium density fiberboard(kgf).

• Journal of the Korean Wood Science and Technology
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• 제19권3호
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• pp.27-34
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• 1991

Screw withdrawal test was carried out on the face and edge of domestic particleboard and medium density fiberboard in order to evaluate optimum pilot hole diameter. The obtained results were as follows: 1. Maximum withdrawal strengths on the face and edge of particleboard were obtained with pilot hole diameters at about 50% of root diameters of screw. 2. Maximum withdrawal strength on the face and edge of medium density fiberboard were obtained with pilot hole diameters that were about 60% and 50% of root diameters of screw, respectively. 3. Withdrawal strength showed about 91% of maximum withdrawal strength when pilot holes were not pre bored at particleboard. but when pilot holes at 90% of root diameter of screw withdrawal strength showed about as 51.3% of maximum withdrawal strength. 4. Withdrawal strength showed about 88% of maximum strength when pilot holes were not used, but withdrawal strength indicated 55.4% of maximum strength in case of 90% of root diameters of screw. 5. Maximum withdrawal strength on the face of particleboard was about 70.5% higher than that of the edge, and however medium density fiberboard was about 19.6% higher than that of the edge.

• Journal of the Korean Wood Science and Technology
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• 제18권2호
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• pp.67-78
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• 1990

This study was performed to determine the characteristics of physical and mechanical properties of domestic wood based materials; plywood, particleboard, medium density fiberboard. Main items of tested properties were panel size, moisture content, water absorption, linear expansion and thickness swelling, glue bond shear strength, bending properties(stress at proportional limit, modulus of rupture. modulus of elasticity), tensile strength, screw holding strength, and internal bond as neccessary. the results were discussed mainly with Korean Standards. The obtained conclusions are as follows; 1. Length and width of 3mm thin plywood(3-ply) and 12mm thick plywood(7-ply) were satished with KS-standard, but thicknesses of these panels were not- passed tolerance limit except one of eight makers. 2. Length and width of particleboard and medium density fiberboard were greater than the tolerance limit value of KS standard, but the thicknesses of these panels were passed this value. 3. Moisture contents of 12mm thick and 3mm thin plywood were satisfied with KS-standard except one mill made 3mm thin plywood. 4. Moisture absortion of plywood was not passed tolerance limit of KS-standard but particleboard was satisfied with this standard value. 5. Dry and wet shear strengths in glue bond of 3mm thin plywood were not reached to KS-standard, but those of 12mm thick plywood were sufficiently satisfied with KS standrad. 6. Modulus of ruptures, parallel to grain and perpendicular to grain of plywood, and particleboard and medium density fiberboard were satisfied with KS-standard. 7. Tensile strengths, parallel to grain and perpendicular to grain of plywood were satisfied with allowance stress of US product standard PS 1-74. 8. Screw holding strength of particleboard was not reached to KS standard, but internal bond was satisfied with KS standard.

• Journal of the Korean Wood Science and Technology
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• 제30권4호
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• pp.23-26
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• 2002

현재 폐목재의 발생량은 국내의 연간 목재사용량의 40% 정도의 수준으로 국내의 목재자급율을 고려해볼 때, 목재패널산업에서의 이런 폐목재의 재활용은 많이 장려되어야 한다. 본 연구는 폐목재로부터 얻어진 파티클과 실험실에서 합성한 요소수지를 폐목재파티클의 전건무게에 대해 6% 첨가하여 열압온도 162℃와 열압시간 5분에서 파티클보드를 제조하고 ASTM D 1037 방법에 의해 파티클보드의 성능을 평가하였다. 파티클보드의 성능을 평가한 결과는 KS F 3104 파티클보드 8.0형의 최소요구를 만족시키는 것이다. 이런 파티클보드의 성능평가 결과는 폐목재가 파티클보드의 원료로 적합하다는 것을 보여준다.

• Journal of the Korean Wood Science and Technology
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• 제45권5호
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• pp.613-621
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• 2017

본 연구는 건조된 나무못이 유지력 특성에 미치는 영향에 대해 알아보기 위해 실시했다. 실험블록은 두께가 15 mm인 소나무와 잣나무 목재 및 파티클보드로 제작했다. 직경이 6, 8 및 10 mm인 나무못은 밤나무, 잣나무 및 백합나무 목재로 각각 제작한 다음 전건시켜 사용했다. 연구결과 나무못 직경이 증가하면 유지력은 증가했지만, 유지력 강도는 감소했다. 건조된 나무못의 유지력은 일반적인 조건의 나무못의 유지력보다 잣나무목재 실험블록에 직경이 10 mm인 백합나무 목재로 만든 나무못을 제외하고 10% 이상 증가를 보였다. 유지력 강도는 모든 수종의 나무못 직경과 실험블록에서 10% 이상 증가를 보였다. 파티클보드 실험블록에 건조된 나무못의 유지력과 유지력 강도는 각각 6~14.2%와 6.2%~18.2% 증가를 보였다.

• 한국산림과학회지
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• 제96권1호
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• pp.54-57
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• 2007

요소수지접착제를 합판제조용 접착제와 유사하게 실험실에서 합성하고, 합성한 요소수지접착제를 증량제, 충전제, 산경화촉매제와 혼합하였다. 요소수지접착제 혼합물의 고형분량은 56.1%이고, 물은 43.9%였다. 국산재와 요소수지접착제 혼합물로 5종류의 Com-Ply를 제조하고, KS F 3101 보통합판의 인장 전단 접착력 시험 및 KS F 3104 파티클보드의 휨파괴계수 시험을 수행했다. 성능 평가된 결과는 제조된 5종류의 Com-Ply에서 모두 적합한 결과를 보여줬다. 이런 결과는 본 연구에서 사용된 요소수지접착제 혼합물이 국산재 Com-Ply제조에 적합하다는 것이다.

• 한국산림과학회지
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• 제104권2호
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• pp.254-260
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• 2015

이 연구는 수입 목제품과 국산 목제품의 수요가 불완전 대체관계에 있다고 가정하고 아밍턴 대체 탄성치를 추정하였으며 이에 근거하여 수입 목제품의 관세 인하가 국내 목제품 생산에 미치는 영향을 분석한 것이다. 분석 대상 목제품은 합판, 섬유판, 파티클보드로 하였다. 분석결과, 국산 목제품과 수입 목제품은 완전 대체관계에 있지는 않은 것으로 나타났다. 합판과 섬유판에서 국산품과 수입품의 대체 탄성치가 높게 나타나 관세를 인하하였을 때 그 영향이 적지 않을 것으로 생각된다. 이에 비해 파티클보드 시장에서 국산품과 수입품은 차별화되어 있으며 대체 관계가 낮은 것으로 보인다. 섬유판은 국내 숲가꾸기 산물을 원료로 사용하고 있기 때문에 섬유판 생산의 위축은 국내 임업에도 부정적 영향을 미치게 될 것이다. 따라서, 시장개방에 대응하여 국내 목제품 산업의 경쟁력 강화를 위한 대책이 필요하다.