Accelerated Methods of Drying Thick-Sliced and Thin-Sawed Loblolly Pine

This paper covers a study of the effectiveness of various methods to accelerate the drying of sawed and sliced loblolly pine of 3/16-, 3/8-, and 9/16-inch thicknesses. Drying rates, shrinkage values, and quality of sawed and sliced material are compared. Three processes (roller-type veneer, impingement, and press drying) at two temperature levels, (240?F.and 300?F.) were used. Generally, the sliced material dried from 8 to 42 percent faster than did the sawed. Shrinkage in width was least and shrinkage in thickness was greatest with press-dried stock. Cup occurred less in press drying; the amount of crook was negligible in all the drying methods. The study clearly indicates that it is technically feasible to dry thick-sliced and thin-sawed loblolly pine very rapidly as compared to kiln-drying or air-drying.

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