Table 14 . --Comparative properties of various structural flakeboard configurations from disk and ring flakes 



Flake type 



c • 1/ 

 Species— 



: Resin : 

 : content : 



Dry 

 specific 

 gTavity 



Modulus 



of 

 rupture 



Modulus : 

 of : 

 elasticity : 



Internal : 

 bond : 



50-90 percent 

 relative humidity 



Linear Thickness 

 expansion swell 







Percent 





Lb/in^ 



7 ODD Th/in^ 



bo/zn 



Percent 



Percent 





ALINED 



HOMOGENEOUS FLAKEBOARD 













Stands : 



0.016 in by 1.5-3 in --parallel 





6 



0.64 



5,480 

 1 850 



968 

 215 



92 



03 

 .40 





Ring flakes: 



0.016 in by 1.5-3 in --parallel 

 from large chips — perpendicular 



vx 



6 



.67 



6,110 

 2,250 



777 

 . 254 



113 



.04 

 .26 



-- 



Disk flakes: 



0.020 in by 2 in by 0.05 in --parallel 



--perpendicular 



DF 



5 



.64 

 .57 



9,500 

 460 



1,777 

 56 



91 



.00 

 1.92 



9.4 





3 -LAYER 



ALINED FLAKE BOARD 













Alined face — cross-alined core strands: 

 0.016 in by 1.5-3 in --parallel 



--perpendicular 



VX 



5-6 



.75 



5,500 

 4,000 



899 

 445 



125 



.11 

 .11 



-- 



Alined face--cross-alined core: 



Faces (30%): 0.02 by 2-in disk flakes 



--parallel 



Core (70%) : 1-in ring flakes from 1-in chips 



--perpendicular 



DF 



5 



.65 

 .63 



6,580 

 3,110 



1,398 

 412 



112 



.02 

 .16 



11.3 



Alined face--random core: 



Faces (40%): 0.02 by 2-in disk flakes 



--parallel 



Core (60%): 3/4-in ring flakes from 3/4-in 

 chips --perpendicular 



DF 



5 



.65 

 .65 



6 , 740 

 2,050 



1 , 394 

 240 



1 10 







Faces (30%): 0.02 by 2-in disk flakes 



--parallel 



Core (70%)' . 0.02 by 2-in ring flakes from 

 2-in chips— --perpendicular 



DF 



5 



.72 

 .68 



6,620 

 2,640 



1,247 

 359 



86 



.06 

 .28 



7.6 



--parallel 

 --perpendicular 



LP 



5 



.70 

 .68 



7,750 

 3,560 



1,299 

 348 



130 



.10 

 .35 



8.7 



3-LAYER RANDOM FLAKEBOARD 



Face flakes (30% bd wt) : 



0.02 by 2-in disk flakes plus 0.02 by 2-in ring 

 flakes from 2-in chins (screened + 1/2-in) 



Core flakes (70 % bd wt) : Above screened - 1/2-in 



Face flakes (50% bd wt) : 



0.02 by 2 ring from 2-in chips 

 Core flakes: Slivers 



Face flakes (30% bd wt) : 



0.02 by 2 disk flakes 

 Core flakes (30% bd wt) : 



0.02 by 2 ring flakes from 2-in chips 



Ring flakes: 



0.02 by 2-in from 2-in chips 



LP 



DF 



4/2 



.72 



LP 5 .69 



RANDOM HOMOGENEOUS FLAKEBOARD 



Ring flakes: 



0.02 by 2-in from 2-in chips 



Disk flakes: 



0.02 by 2-in from 2-in chips 



Ring flakes: 



0.02 by 2-in from 2-in chips 



Disk flakes: 



0.02 by 2-in from 2-in chips 



DF 

 DF 

 DF 

 LP 



.67 



4,620 



5,255 



5,260 

 5,270 



4,340 

 4,015 

 4,310 

 4,935 



-no 



795 



.10 8.0 

 .15 8.9 



.05 11.5 



.07 11.2 



Chips, hand-cut: about 1-by 1-by 2-in 



^Species code: DF, Douglas-fir from west of Cascades; LP, lodgepole pine, VX, variety of softwoods. 



1 8 



