• 한국가구학회지
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• 제21권3호
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• pp.237-247
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• 2010

This research was carried out to examine the properties of black charcoal board, in order to find the proper manufacturing condition for the black charcoal-board made of the charcoal. The charcoal in this study was distillated from domestic wood waste, and it were also the purpose of this study to see if the black charcoal-board has the advantageous properties of charcoal as a well-being building material against the sick house problem. Domestic wood waste was consisted of MDF 40%, PB 30%, plywood 15% and wood 15%, respectively. Black charcoal board was produced by hot pressing with following conditions; temperature $170^{\circ}C$, three stage pressing cycle of $40-10-40\;kgf/cm^2$(1min.-2.5min.-5min.) and non formaldehyde adhesives [P15%+M5%:MDI(M), poly vinyl acetate emulsion(P). Fine mixed particle size [#6-12(16.9%), #12-18(16.7%), #12-40(47.2%), #40-60(9.5%), #60-100(5.9%), less than #100(3.8%)] gave better results than larger particle size [over #6(33.8%), #12-18(17.7%), #12-40(37.7%), #40-60(6.4%), #60-100(2.6%), less than #100(1.8%)]. Final moisture content of the mat was best at 36%. Black charcoal-board showed less MOR and IB(internal bond), more WA(water absorption) than that of white charcoal-board. Black charcoal board showed not only the same gas adsorption and dimensional stability as white charcoal board but also good cutting, nailing and drilling for indoor environment systems.

• Journal of the Korean Wood Science and Technology
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• 제10권3호
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• pp.189-189
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• 1982

This study was carried out to determine the possibility of making fiberboard through the dry forming process, utilizing the tannin-like material of the Asplund pulp from the silk worm oak as a binder. The fiberboard was made through paraformaldehyde treatment, spray of NaOH solution and adjustment of mat moisture content, by hot-pressing at $220^{\circ}C$, and 50-6-50kg/$cm^2$ pressure with 6-min. (0.6-1.8-3.6) three-stage pressing cycle. The results are summarized as follows: 1. The modulus of rupture value of fiberboard treated with NaOH solution was greater than that of untreated. The value was increased in proportion to the paraformaldehyde content from I to 5%, but there was no increasing between 5 and 7% paraformaldehyde content. The value became higher along with the increase of mat moisture content from 15% to 25%. 2. The water adsorption of fiberboard treated with NaOH solution was lower than that of untreated. The value was de"creased in proportion to the paraformaldehyde content from 1 to 5%, but there was no decreasing between 5 and 7% paraformaldehyde content.. 3. A good quality fiberboard (modulus of rupture value of about 250kg/$cm^2$) was made through 5% paraformaidehyde treatment and 3% treatment of 10% NaOH solution, when the mat moisture content was 25%. was 25%.

• Journal of the Korean Wood Science and Technology
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• 제33권3호통권131호
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• pp.22-29
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• 2005

이 연구는 숯파티클 크기에 따른 최종 매트 함수율에 관한 백탄보드의 적정제조조건을 규명할 뿐 아니라 백탄보드가 새집증후군에 대한 친환경적 재료로서 백탄의 유익한 성질을 그대로 유지하도록 하기 위하여 수행되었다. 우수한 기능성을 갖는 백탄보드는 최종매트함수율이 20~25%와 36~60%의 2개 그룹에서 생산되었다. 최종매트함수율이 높은 후자는 훨씬 우수한 결과를 나타내었고 비포름알데히드계 접착제[MDI(M), poly vinyl acetate emulsion(P)]와 30-10-$3kgf/cm^2$ (1분-1.5분-6분)의 3단계 열압공정으로 제조된 #40~60형-P15%, M5%, FMC60%와 혼합형-P15%, 5%, FMC36%의 2 종류였다. 숯파티클이 큰 쪽은 최종매트함수율이 적게 필요하였고 #6이상-M15%, FMC25%와 혼합형-M25%, FMC20%의 2 종류가 전자에 속하였다. 백탄보드는 치수안정성, 가스흡착 그리고 원적외선방사율에서 우수한 결과를 나타내었다.