제지 슬러지 - 폴리프로필렌섬유

Physical and Mechanical Properties of Paper Sludge: Polypropylene fiber - Wood fiber Composites

This study investigated the phyiscal and mechanical properties for paper sludge-polypropylene fiberwood fiber composites with densities of 0.70, 0.85, and 1.00g/cm made from nonwoven web process. Three levels of polypropylene fiber addition in composites were designed with 5%, 10%, and 15%. Except for the polyproplyene fiber addition, mixing ratios of paper sludge to wood fiber was 20% to 80%. By the results and discussion, it may be briefly concluded as follows: 1. Thickness swelling and water absorption were decreased with increasing the paper sludge level and the density level. At 1.00 g/cm3 densities, the composites mixed by 15% polypropylene fiber addition level satisfied the water absorption standard value of ANSI-AHA A 135.4 for 3mm hardboard of 1.00g/cm . 2. Modulus of rupture (MOR) and modulus of elasticity (MOE) in bending properties were increased with increasing the density, but decreased with increasing of the paper sludge level. At 0.85 and 1.00g/em densities, the composites mixed with 15% polypropylene fiber addition level. This satisfied MOR and MOE standard value of ANSI-AHA A 135.4. 3. Internal bond strength was increased with increasing the density level, but decreased with increasing the paper sludge level. It is believed that the loss of internal bond strength with the addition of paper sludge may be resulted from lignocellulosic fines and inorganic materials in the paper sludge. 4. Therefore, it is expected to be ab!e to fabricate the paper sludge-polypropylene fiber-wood fiber composites with 15% polypropylene fiber addition at level of 0.85 and 1.00g/cm- densities without the loss of properties in comparing with the urea resined control board.