A laboratory system for generating individual dry secondary wood fibers

Utilizing wastepaper secondary fibers in wood fiber composites offers a potential means to improve recycling efforts. Continued research in this area is needed to expand recycling opportunities. However, it is difficult to conduct dry-process secondary fiber composite research at the laboratory scale because generating dry, individual secondary fibers that retain fiber geometry, integrity, and strength is a formidable task. This paper confirms the technical feasibility of generating dry, individual fibers with the use of a hydropulper and an in-house-constructed wet fiber lump separator and dryer. Specific emphasis is devoted to construction details of the fiber separator and dryer. Results of a preliminary study that consolidated secondary fibers from old corrugated containers (OCC) with diphenylmethane diisocyanate binder at the 3 percent level is also presented to exemplify the technical feasibility and quality of OCC hardboards.

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