The Properties Studies of Particleboards Bonded with the Peanut Hull Extracts－Phenol－Formaldehyde Copolymer Resin

• Main Authors: Doong，Jane, 董蓁
• Other Authors: Tsai-Yung Chen
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/85248766456086735162

碩士 === 國立中興大學 === 森林學系 === 81 === The peanut hull extracts－phenol－formaldehyde copoly- mer resin as glue to make particleboards and flake-boards using different wood speices（ particleboards made from China fir and Taiwan paulownia,flakeboards made from China fir、Taiwan acacia and Moluccan sau）．This glue named home made resin．The results abtained by this experiment may be summarized as：The pH valueand alkali content of home made resin were higher than the commercial resins，and the free formaldehyde content were only 26﹪ about commercial UF resin in Taiwan．The flakeboards made from China fir were the best of ones bonded with home made resin．The flake- boards made from Taiwan paulownia didn't attain the planned density and their strength were weaker．The particleboards made from China fir still were the best of ones bonded with home made resin．The particleboards made from Taiwan acacia couldn't attain the expected strength，because their com- pression ratio（compaction ratio）were too low．The other ones made from Moluccan sauon this experiment were not good enough．Formaldehyde was released from the particleboards made from China fir that bonded with the peanut hull ex- tracts －phenol－formaldehyde copolymer resin about 4.36mg/L free formaldehyde．The particleboards made from China fir showed a residual MOE and MOR about 80.16﹪ and 92.07﹪ re- spectively after long term（720 hours）creep test．The line arizable function between creep deflections and loading time was：Ｙ＝ｔ ／（0.01g＋0.08ｔ），whereＹ＝Creep deflec- tion（mm）；ｔ＝ Loadingtime（hr.）