Coating of finished flax particle boards with insoluble gelatin

Abstract Coating of finished flax particle boards with gelatin only, did not improve the resistance of boards to hot water. Coating with gelatin rendered insoluble, however, using hexamine and high temperature produced an insoluble gelatin film on the flax particles, which improved water resistance of the coated boards. Particle boards coated with 5% gelatin and a high concentration of hexamine (10%), improved water resistance to about 50% higher than that of uncoated samples. Higher amounts of gelatin (7.5 and 10%) gave a smaller improvement. The changes in thickness and density of the coated samples were also investigated.