Structural Flakeboards and Composites 

 40 



2925 



30 



DISK.^ — — 



Co 



I 



I 



.3 



^DRUM 



RING^ 



LATHE 



LATHE 



RED OAK (38.3 pcf) 

 30-90% RH 



QD - VPS 



DRUM 



LI 



L2 



,3 L4 LI 1.2 



COMPACTION RATIO 



1.3 



Figure 24-8. — Linear expansion and thickness swell related to compaction ratio in 1/2- 

 inch-thick southern red oak and mockernut hickory panels made from 2-1/4-inch- 

 long, 0.020-inch-thick flakes cut on four types of flakers, and subjected to a change of 

 relative humidty (RH) from 30 to 90 percent or to an ovendry-vacuum-pressure-soak 

 (OD-VPS) cycle. (Drawing after Price and Lehmann 1978.) 



