처리 온도에 따른 90 × 90 mm 낙엽송 각재의 재색 차이 조사
Investigating the Color Differences of 90 × 90 mm Larch Squares Heat-treated at Various Temperatures
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
To make value-added products from small-diameter larch logs it is necessary to reduce the color variation between boards. The effect of heat treatment on the color variation was investigated. Four hundred air-dried larch squares were visually classified into six groups. The largest color difference index between them was 8.8. When they were kiln-dried lower than 120°C, their average color difference indexes decreased to less than 6.0 compared with the air-dried. However statistical analyses revealed that kiln-drying largely increased the variation of the indexes of the color elements. Heat-treatment above 150°C increased the color difference indexes with the increase of temperature. The variation of color difference indexes within a group at 190°C were less than the groups at 150°C and 170°C. It implies that heat treatment at 190°C could make the color of larch squares uniform.
Abstract
To make value-added products from small-diameter larch logs it is necessary to reduce the color variation between boards. The effect of heat treatment on the color variation was investigated. Four hundred air-dried larch squares were visually classified into six groups. The largest color difference index between them was 8.8. When they were kiln-dried lower than 120°C, their average color difference indexes decreased to less than 6.0 compared with the air-dried. However statistical analyses revealed that kiln-drying largely increased the variation of the indexes of the color elements. Heat-treatment above 150°C increased the color difference indexes with the increase of temperature. The variation of color difference indexes within a group at 190°C were less than the groups at 150°C and 170°C. It implies that heat treatment at 190°C could make the color of larch squares uniform.
참고문헌 (6)
- Bhuiyan, M. T. R., "Changes of crystallinity in wood cellulose by heat treatment under dried and moist conditions", Journal of Wood Science, 46(6), pp.431~436 (2000)
- Garrote, G., "Hydrothermal processing of lignocellulosic materials", Holzals Rohund Werkstoff, 57(3), pp.191~202 (1999)
- Obataya, Eiichi, "Hygroscopicity of heat-treated wood I: Effects of after-treatments on the hygroscopicity of heat-treated wood", Mokuzai Gakkaishi, 46(2), pp.77~87 (2000)
- Tejada, A., "Reduction of growth stress in logs by direct heat treatment: Assessment of a commercial- scale operation", Forest Products Journal, 47(9), pp.86~93 (1997)
- 강호양, "은사시나무의 건조특성", 한국목재공학회, pp.50~55 (2001), 임업연구원
- 김수원, "열처리 및 증기처리 라디에타 파인 유령목의 잔류수지율 및 재색변화", 목재공학, 33(4), pp.30~37 (2005), 한국목재공학회