Fractionated sawdust chipboard and method of making same

Chemistry of carbon compounds – Miscellaneous organic carbon compounds

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156 622, 260 6, 260 7, 260 75, 260 8, 260 9, 260 172, 260 174R, 264113, 264122, 428326, C08L 102

Patent

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039591956

ABSTRACT:
A chipboard structure is disclosed which is made substantially of 100% sawdust waste material. The chipboard has a core portion which contains the coarsest particles of the sawdust, the surface portions of the chipboard containing the finest fraction of the sawdust, intervening portions of the chipboard containing fractions which increase in size from the surface to the core portion of the chipboard. The method and apparatus involve the use of sawdust having a width and/or thickness no greater than 4.75 mm, the fractions of the sawdust having a particle size greater than 0.1 mm being sliced to increase the quantity of the fractions below 0.1 mm. Because the small particles are randomly disposed in the chipboard in directions not only parallel to the plane but also perpendicular and at an angle thereto, characteristics are obtained which are as good as chipboard produced from conventional materials other than sawdust.

REFERENCES:
patent: 3098781 (1963-07-01), Greten
patent: 3283048 (1966-11-01), Hoppeler
patent: 3843431 (1974-10-01), Dostalik
patent: 3846219 (1974-11-01), Kunz

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