Spaceboard II Panels: Preliminary Evaluation of Mechanical Properties
Keywords:Spaceboard, papier-mâche, sheathing panel
AbstractThis preliminary evaluation of the properties of Spaceboard II (SBII) was undertaken to establish the potential of a pulp-molded product in structural-use applications and to develop a basis upon which to optimize the Spaceboard pulp molding process. Various tests were implemented to characterize significant engineering properties, including static concentrated load, panel bending, panel shear, bearing strength, and coupon tension and compression strength. Although these tests were preliminary in nature, they were nonetheless adequate to show that SBII panels perform quite satisfactorily under "dry" conditions, relative to the current performance requirements established for structural-use panels. Our tests on SBII demonstrated that with proper formation and densification, a three-dimensional pulp molding process such as Spaceboard provides the opportunity to create structural products from fiber and to obtain the performance required of conventional products.
American Plywood Association (APA). 1991. Performance standards and policies for structural-use panels. APA PRP-108. American Plywood Association, Tacoma, WA.nAmerican Society For Testing and Materials (ASTM). 1991a. Evaluating properties of wood-base fiber and particle panel materials. ASTM D1037. American Society for Testing and Materials, Philadelphia, PA.nAmerican Society For Testing and Materials (ASTM). 1991b. Performance of wood and wood-based floor and roof sheathing under concentrated static and impact loads. ASTM E661. American Society for Testing and Materials, Philadelphia, PA.nGleisner, R. L., and D. E. Gunderson. 1992. Dry forming sculptured fiberboard with an improved fiber distribution apparatus. U.S. patent application, disclosure 7/18/92.nGunderson, D. E. 1988. Apparatus for forming uniform density structural fiberboard. U.S. Patent 4, 753,713.nGunderson, D. E., and R. L. Gleisner. 1992. Method for forming structural components from dry wood fiber furnish. U.S. Patent 5, 314,654.nGunderson, D. E., and R. L. Gleisner. 1994. Spaceboard II structural panels—Forming apparatus and methods. Wood Fiber Sci. 26(1):19-27.nHunt, J. F., and C. T. Scott. 1988. Combined board properties of FPL spaceboard formed by a new method. Tappi 71(11): 137-141.nSetterholm, V. C. 1985. FPL spaceboard—A new structural sandwich concept. Tappi 68(6):40-42.nSetterholm, V. C., and Hunt, J. F. 1987. Method and apparatus for forming three-dimensional structural components from wood fiber. U.S. Patent 4, 702,870.n
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