Correlation of Accelerated and Long Term Stability Tests for Wood-Based Composite Products

ASTM Method D-1037, commonly used for determining dimensional stability, was found to be too time-consuming for both product development and production plant use. Several minor modifications were made in an accelerated dimensional stability method proposed by B. G. Heebink of the Forest Products Laboratory and this modified procedure is used by the Weyerhaeuser Company, Research Division Test Laboratory. Specimen length is measured by use of a Trammel-type comparator, a) as received, b) after ovendrying 24 hours at 220?F. and c) after a vacuum-pressure soaking cycle consisting of 2 hours under a vacuum of 29 inches Hg. followed by 46 hours under a pressure of 40 psi. Many data covering matched sample testing of different products have been statistically analyzed. The regression equations relating V.P.S. and ASTM methods have proved so reliable that routine ASTM testing of particleboard had been eliminated and is used solely for confirmation.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member