| Summary: | 碩士 === 國立嘉義大學 === 林業研究所 === 91 === The main purpose of this study was aimed at evaluating the effects of three manufacturing factors, i.e. glue level(2%, 4% and 6%), sp. gr.(0.8, 1.0 and 1.2), release agent(March-3824+,CPC motor Oil, U-00H silicone release agent), on the physical properties effectiveness of layer structure of M&R composites. Furthermore, the business process reengineering(BPR) of the forest product industry was also studied.
The compression molding process was used to manufacture wood material and recycled tire rubber components. SBRL SF-1166 resin was applied as binder. The effects of wood material to tire density and SBRL SF-1166 resin level and type of release agent on mechanical properties of the composites were studied. A three-factor factorial design was employed to construct this experiment and each factor had three levels. Wood material to tire rubber density, based on ovendry weight, were 0.8, 1.0, and 1.2(g/cm3). The SBRL SF-1166 levels, basedon the total ovendry weight of wood material and tire rubber, were 2, 4, and 6 percent. The release agent types, were March-3824+, CPC 9000 SL Motor Oil, and U-00H silicone release agent.
The impact strength of the composites was tested using the Izod-type testing method. The bending strength(MOR), bending modulus (MOE), internal bond strength(IB), density(D), moisture content(MC), thickness swelling due to water absorption(TS), wood screw holding strength(R), and tensile strength(T) of sandwich composites of RMR and MRM specimens were tested.
Results illustrated that SBRL SF-1166 resin can be used successfully to consolidate the wood material and recycled tire rubber crumbs into composite panels. The impact strengths significantly improved with tire rubber fraction in the composites. In general, MOR, MOE, wood screw holding strength(R), and tensile strength(T) of sandwich composites of RMR and MRM specimens were improved with the increase of wood material to tire rubber density, SBRL SF-1166 level, and release agent.
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