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Kakamigahara, Japan

Korai H.,Japan Forestry and Forest Products Research Institute | Ling N.,Japan Forestry and Forest Products Research Institute | Sumida A.,Shinwa Wood Industrial Co. | Yasuda O.,Co operative Union Swood | Osada T.,Co operative Union Swood
Journal of Wood Science | Year: 2010

Boards were produced by using SP adhesive, which contains styrene-butadiene rubber and polyethylene glycol as major constituents. The use of polyethylene in place of clay, which is also a generally used constituent of SP adhesive, was confirmed to improve board properties. In general, the properties of boards are poorer when produced by two-stage pressing, in which mats are first processed by temporary adhesion and then processed into boards by permanent adhesion; however, the properties of boards produced by two-stage pressing were improved when polyethylene was added to the SP adhesive. In addition, internal bond strength and thickness swelling was greatly improved when boards were produced from ozonized wood and by sealed pressing. Thus, the properties impaired by two-stage pressing were improved by ozonization and sealed pressing. © 2010 The Japan Wood Research Society.


Korai H.,Japan Forestry and Forest Products Research Institute | Ling N.,Japan Forestry and Forest Products Research Institute | Osada T.,Co operative Union Swood | Yasuda O.,Co operative Union Swood | Sumida A.,Co operative Union Swood
Journal of Wood Science | Year: 2011

An air-injection press was developed to prevent particleboard from blowing out during the manufacturing process. The air-injection press, which has holes punched in the heating plates, injects high-pressure air into the board through the holes of one plate and releases the air through the holes of the other plate. The high-pressure air forces out vapor trapped within the board, thus preventing blowout. The newly developed press reduced the pressing time required for manufacturing board from high-moisture-content particles. However, the manufactured boards exhibited mechanical properties and dimensional stability inferior to conventionally manufactured boards. © 2011 The Japan Wood Research Society.

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