Composite Plywood with Southern Pine Veneer Faces and Oriented Strand Core from Sweetgum and Southern Pine

Authors

  • E. J. Biblis

Keywords:

Composite plywood, southern pine, sweetgum, veneer, strand, core

Abstract

Certain mechanical properties and dimensional changes of 1/2 in. composite plywood, fabricated from 1/8 in. southern pine veneer faces and 1/4 in. unidirectionally oriented strand cores were evaluated. Three types of cores were included: (a) 100% southern yellow pine, (b) 100% sweetgum, and (c) a mixture of 50% southern pine and 50% sweetgum. The cores were blended with a liquid phenolformaldehyde resin (6 1/2% solids) and bonded to veneer faces with an extended phenolic glue.

Experimental results indicate that the physical and mechanical properties of the composite panels were equal to and, in certain cases, superior to 1/2 in. southern pine CDX plywood and to commercial composite plywood from western species.

After comparing the experimental results of the composite panels with similar properties of commercial CDX southern pine plywood, the following conclusion can be drawn: Composite panels similar to those tested are expected to perform satisfactorily all structural functions required by sheathing panels for walls, roofs, and subfloors.

References

American Plywood Association. 1981. Personal communication. Tacoma, Washington.nAmerican Society for Testing and Materials. 1974. Standard D1037; D3043; D2718; in ASTM. Annual Book of Standards, Part 22, Philadelphia, PA.nBiblis, E. J., and W. C. Lee. 1984. Properties of sheathing-grade plywood made from sweetgum and southern pine. Wood and Fiber Science16(1):86-92.nBiblis, E. J., and F. Mangalousis. 1982. Properties of 1/2 in. composite plywood with southern y. pine veneer faces and unidirectionally oriented southern oaks strand core. For. Prod. J.33(2):43-49.nBiblis, E. J., W. L. Chen, and W. C. Lee. 1982. Rolling shear properties of southern pine plywood and unidirectionally laminated veneer. For. Prod. J.32(2):45-50.nKoch, P. 1982. Non-pulp utilization of above-ground biomass of mixed-species forests of small trees. Wood Fiber14(2):118-143.nMcKean, H. B., J. D. Snodgrass, and R. J. Saunders. 1975. Commercial development of composite plywood. For. Prod. J.25(9):63-68.nSnodgrass, J. D., and R. J. Saunders. 1974. Building products from low quality forest residues. Paper No. 74-1549, Winter meeting American Society of Agricultural Engineers. Chicago, IL.nUSDA, Forest Service. 1974. Wood handbook No. 72. Washington, DC.nUSDA, Forest Service. 1978. Forest statistics of the U.S. in 1977. Washington, DC.n

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Published

2007-06-27

Issue

Number 1 / January 1985

Section

Research Contributions

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