Natural Hybrid Sandwich Composite For Hardboard Application

Lisa, Theng (2011) Natural Hybrid Sandwich Composite For Hardboard Application. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This research was to design and fabricate a light weight but high strength natural sandwich composite which was suitable for hardboard application. Besides that, the natural sandwich composite was expected to have superior properties and performances, such as long durability but low maintenance and most important was low cost. These help the Small Medium industries (SMI) a lot as they only able to produce the low cost natural sandwich composite due to the limitation in assets. Core material of rubber wood, reinforcement material of E-glass fiber, and matrix material of unsaturated polyester was chosen to produce the natural sandwich composite due to advantages that they own. Vacuum bagging process was used to fabricate the composites since it produced products with constant thicknesses. After fabrication, the product was undergone several mechanical and physical tests such as dimensional swelling, flexural, tensile, drag resistance, peel resistance, and water absorption based on ASTM standard. Five different compositions of the natural sandwich composite were produced and analyzed. SIN 4 was determined as the best product due to superior properties and reasonable cost when compared to AP. For example, SIN 4 gives a force value of746.15 Nand a stress value of2.52 MPa at the extension of 2.75 mm in flexural test; a force value of 15.84 kN and a stress value of 3. 11 MPa at the extension of 17.62 mm while a young modulus value of 46.57 MPa in tensile test; a force value of 4.65 kN at the extension of3.56 mm in drag resistance test; and a force value of 93.89 N at the extension of 5.80 mm in peel resistance test. All these values show a drastically increased compared to AP. This means that the properties of SIN 4 were much better compared to AP. As the conclusion, the natural sandwich composite has high potential in hardboard application due to superior properties such as light weight and high strength.

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