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논문 기본 정보

자료유형
학술저널
저자정보
강호양 (충남대학교 농과대학)
저널정보
한국목재공학회 목재공학(Journal of the Korean Wood Science and Technology) 목재공학 제23권 제1호
발행연도
1995.1
수록면
35 - 41 (7page)

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Persimmon boards of 30mm thick were dried, their temperatures were monitored during drying with 490 and 200watt microwave, and the drying efficacy and problems were investigated. The effects of pretreatments such as presteaming and prefreezing were also examined. The persimmon green lumbers of 80% moisture content were dried to 10% for only 50~60 and 110 minutes with 49watt and 200watt microwave, respectively. Severe internal checks were, however, found in all boards. The presteamed boards collapsed on their surfaces earlier than the controls. It may attribute to the high temperature inside boards during microwave drying and the decrease of their internal tensile strength caused by the presteaming treatment. To increase the internal tensile strength of the pretreated boards and to reduce their internal checks, they were air-dried at room temperature. The air-dried boards could be dried to 10% moisture content clearly and free from defects with 200watt microwave. The heating efficiency were also calculated with the maximum weight loss per minute of 490watt and 200watt.

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