The Effects of Boric Acid on Fiberboard Made from Wood/Secondary Fiber Mixtures: Part 2. Utilization of Recycled Old Corrugated Container Fibers

It was realized that both boric acid (BA) and secondary fibers (S) from Old Corrugated Container (OCC) negative impact on thickness swelling (TS) properties of boards in water. However, the highest Modulus of Elasticity (MOE) values of both type boards were found at 90/10 Wood/Secondary fiber (W/S) ratio with values of 2966 MPa and 1009 MPa, respectively. It is clear that increasing secondary fiber content effects on lowering MOE values in some level. However, except of the boards of B10 and B10a which produced only from secondary fibers, all other experimental boards show higher MOE than standard value of 600 MPa.

The secondary fibers from recycled OCC can be useful for improving sound (acoustic) properties some level. Interestingly, the highest sound absorption (SA) coefficient of 0.91 and 0.81 were also found at 90/10 (W/S) mixture, respectively.