Annealing of Composite Boards

Such an effective annealing of the boards in boiling water was due to the fact that the boards were hollow, and water accessed the material from both outside 

TABLE 9.2 Shrinkage of GeoDeck composite hollow deck boards (unbrushed) in boiling water 

Time for exposure of boards to boiling water (min) Shrinkage measured after 24 h of cooling and conditioning (%) Moisture of the boards after 24 h Moisture of the boards after 48 h 

Shrinkage was measured 24 h after the boards were immersed into boiling water and pulled out. Water had an access to the material from both outside and inside of the boards. 

Moisture absorption of all boards described in Table 9.3 and boiled for 1-5 min, measured after 24 h, was 0.096 0.003%. 

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