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Four species including Taiwania cryptomerioides Albizzia falcata
﹑Paulownia taiwaniana and Trema orientalis were used in this
experiment. Flakes were prepared for acetylation. Two adhesives
and threee resin contents were used to manufacture the
flakeboard, then physical and mechanial properties of the board
were determined. The main results obtained in this experiment
may be summarized as the follows: 1.Acetylation causes a great
reduction in equilibrium moisture content by 40％∼50％ when
acetylated flakeboard were placed at various relative humidity
condition. 2.In water soaking test, acetylated flakeboards
showed only 15％∼25％ in thickness swelling for six days water
soaking,the water absorption was only 45％∼80％ of the
untreated woods. 3.Acetylated wood could reduce the compressed
stress that occurred in hot pressing period that produced in
hot press. and it could reduce the springback of flakeboard.
The Irreversible swelling and reversible swelling could be
reduced effectively in the oven dry/water soaking cycles test
too. 4.The mechanical properties of four species flake board
could meet the CNS 2215-02012 reguirments for the type 200
particle- board. Acetylation also reduces the hydrophilic
nature of wood which resulting in poor flake wettability. It
would cause reduction in internal bonding strength by 67％,MOR
by 30％∼40％ , and 10％∼20％ of MOE and nail holding tenacity.
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