• Journal of the Korean Wood Science and Technology
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• 제27권3호
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• pp.39-50
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• 1999

라디에타소나무, 케루잉, 딜레니아, 터미날리아 및 칼로필롬 단판에 내화약제로서 20% 제2인산암모늄 수용액을 상압 침지 및 진공가압침지 처리한 시험을 실시 하였으며, 라디에타소나무와 케루잉 단판의 구성형태와 내화약제의 침지처리 조건들을 여러형태로 조합한 합판을 요소 멜라민 수지와 페놀수지 접착제를 사용하여 제조하였다. 결과, 라디에타소나무가 케루잉보다 약제보유도 및 처리효과가 뛰어났으며, 진공가압침지가 상압침지보다 약제보유면에서는 유효하였다. 그리고, 기계적 성질에 있어 단판첨지법으로 내화처리를 하여 제조한 합판이 반드시 접착력 및 휨강도적 성질의 저하를 가져오지는 않았으며, 내화성에 있어서는 요소 멜라민수지 접착이 우수한 성능을 보였다. 결과적으로, 접착 강도성능과 내화성능을 고려한 단판 수종의 적정한 선택, 층간구성(조합) 및 교호약제처리가 실제 사용시 가능할 것이다.

• 한국가구학회지
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• 제14권2호
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• pp.21-29
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• 2003

This study was carried out to investigate characteristics of plywood overlaid with softwood veneers densified by resin impregnation and compression. The resin impregnability of Korean pine veneer under atmospheric pressure soaking was greater than that of larch, and impregnability of melamine resin was slightly greater than phenolic resin. It was suggested that resin impregnation ratio was affected by density and thickness of veneer. The largest melamine resin impregnation ratio of 50.7% was obtained with 1.26mm thick Korean pine veneer, and the lowest phenolic resin impregnation ratio of 11.7% with 3.41mm thick larch veneer. Therefore, it was suggested that the vacuum-pres sure-soak treatment is required at thick larch veneer. In densifying resin-impregnated veneers, densification ratio from 13.4 to 31.2% was obtained by high pressure from 15.6 to $20.8kgf/cm^2$. Impregnation of melamine resin also showed relatively greater at densification than that of phenolic resin. So it showed the degree of densification of about 20% or greater. It was seemed that adhesive bonding strength of plywood(base panel) which was directly pressed and overlaid with resin-impregnated veneer was affected by resin tackiness after resin impregnation followed by semi-drying. In laboratory scale, melamine resin impregnation was more favorable for the development of adhesive bonding strength owing to moisture control.