국내산재-남양재로 제조된 직교형적층패널의 물리적 특성
The Physical Properties of Cross-Laminated Wood Panels Made with Tropical Hardwoods and Domestic Temperate Woods
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초록
이 연구에서는 국내산 중·소경목 이용확대 및 목재마루판으로써 효율적인 활용을 위하여 남양재인 티크, 멀바우와 국내산재인 낙엽송과 백합나무를혼합적층한 직교형적층패널을 제작하였고, 상온침지 및 내수 침지박리시험을 실시하여 치수안정성과 내수성을 조사하였다. 상온에서 24시간 침지후 측정한 흡수율은 3.4% - 6.8%의 범위에 있었고, TLa (Teak-Larch)가 가장 높은 값을 나타내었다. 흡수두께팽창률은 TTu (Teak-Tulip tree)가4.7%로 가장 낮았고, TLa가 7.0%로 가장 높은 값을 나타내었다. TLa를 제외한 모든 시험편이 KS에 고시된 목재제품의 규격과 품질기준 6%이하에부합하였다. 내수침지박리시험 후의 박리율의 경우, TLa가 1.1%로 가장 낮았고, MLa (Merbau-Larch)가 50%로 가장 높은 값을 나타내었다. MTu (Merbau-Tulip tree)와 TLa는 KS에 고시된 품질기준에 부합하였으나, MLa와 TTu는 고시된 품질기준에 부합하지 못하는 것이 확인되었다. 내수침지박리시험 후의 흡수율과 흡수두께팽창률은 각각 13.3% (TLa) - 29.1% (MTu), 7.5% (TTu) - 9.8% (MTu)의 범위로 흡수율은 4.3배,흡수두께팽창률은 1.4배 상온침지 후의 그것보다 증가하는 것이 확인되었다.
Abstract
In this study, for efficient use and expansion of domestic small - and medium- diameter woods, cross-laminated wood panels composedof tropical hardwoods such as merbau and teak and domestic temperate woods such as larch and tulip tree were manufactured, immersiontests in room temperature and water-resistant immersion peeling tests of cross-laminated wood panels were conducted to investigatedimensional stability and water resistance. The water absorption rates of cross-laminated wood panels measured after 24 hours of immersionat room temperature ranged from 3.4% - 6.8%, with TLa (Teak-Larch) having the highest value. The thickness swelling of cross-laminatedwood panels was lowest for TTu (Teak-Tulip tree) at 4.7% and highest for TLa at 7.0%. All specimens, except for TLa met the KSstandards for wood products, which require a thickness swelling of 6% or less. In terms of peeling ratios in glue lines after water-resistanceimmersion peeling tests of cross-laminated wood panels, TLa showed the lowest value at 1.1%, while MLa (Merbau-Larch) exhibitedthe highest value at 50%. MTu (Merbau-Tulip tree) and TLa fitted in the quality standards specified by KS, while MLa and TTu didn’tfit in the specified quality standards. After the water-resistant immersion peeling test, the water absorption and thickness swelling rangedfrom 13.3% (TLa) - 29.1% (MTu) and from 7.5% (TTu) - 9.8% (MTu), respectively. It was confirmed that the water absorption ratioincreased by 4.3 times and the thickness swelling increased by 1.4 times compared to those after room temperature immersion.
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