Manufacture and properties of ultra-low-density fiberboard

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Abstract

Low-density fiberboards with densities ranging from 0.05 to 0.50 g/cm3 were manufactured with steam injection pressing. Bond-type and foam-type isocyanate compound resin adhesives were used separately at 10% and 30% resin content levels. Two types of different-size fibers from softwood were used. Mechanical, dimensional, thermal, and sound insulation properties of the fiberboards were tested. The results are as follows: (1) Bond-type isocyanate adhesive showed higher mechanical and dimensional properties of low-density fiberboards than the foam-type adhesive. (2) Fiberboards produced from small fibers have better mechanical and dimensional properties than those made from large fibers. (3) Thermal conductivity of fiberboards depends more on the board density than on the type of resin or fiber dimension. At a board density lower than 0.2 g/cm3, the thermal conductivity is almost equivalent to those of thermal insulation materials such as polystyrene foam and rock wool. (4) Generally, the sound absorption coefficient of low-density fiberboards tends to increase at higher sound frequency. As the board thickness increases, low-frequency sounds are more readily absorbed by boards. © The Japan Wood Research Society 1998.

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Kawasaki, T., Zhang, M., & Kawai, S. (1998). Manufacture and properties of ultra-low-density fiberboard. Journal of Wood Science, 44(5), 354–360. https://doi.org/10.1007/BF01130447

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