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Abstract: Pultrusion is a continuous process with application in the manufacture of fiber-reinforced composite. The thermoplastic pultrusion molding is a manufacturing process in which generated by the resin fiber and reinforcement fibers are pulled through the heat die. The pressure was generated, also the resin fiber start melt and impregnate into the reinforcement fiber. In this investigation study the mechanical properties of jute spun yarn/PLA tubular braided composite by pultrusion molding. The systems for jute spun yarn/PLA braided composite were described in the term of materials design, structure design and processing design. The intermediate materials were prepared by comingle technique. The braiding technique manufactured preform which had jute fiber diagonally oriented at certain angles with the glass fiber inserted into the braiding yarns along the longitudinal direction of braiding structure. The braided preforms were pulled through the heated die where consolidation flow took place due to reduced matrix viscosity. The pultrusion experiments were fabricated the tubular braided composite with varying the structure of braided preform and pultrusion molding condition. The configuration of intermediate material and the molding temperature are influenced to the mechanical properties of jute spun yarn/PLA tubular braided composite. The quality of pultruded composite was evaluated by cross-section observation and mechanical properties evaluated by 4-point bending test. [Copyright &y& Elsevier]

Abstract: The unidirection composites of jute spun yarn/Polylactic acid were fabricated using compression molding. The reinforcement fibers were paralleled with matrix resin fiber and were used as intermediate materials to prepare the unidrection preforms. The parallel yarn was winded onto the metallic frame. The wound paralleled yarns were dried in convection oven before molding. The metallic frame containing the paralleled yarns was placed in heated mold for consolidation to produce the unidirection composite specimens with various molding temperature. The heated mold was cooled by the cooling system of the compression machine. Consolidation process involved three stages. At first, under certain temperature, the solid fibrous matrix materials became softened and then the matrix in the liquid form soaked and infiltrated the reinforcing fibers and finally during cooling stage, the matrix turned into solid form to hold the fibers in a definite position. The molding temperature was affected to the mechanical properties of the unidirection composite. The jute spun yarn/PLA composite were characterized in the term of mechanical properties and the fabrication quality was examined by cross-section observation. The impregnation quality and dispersion of fiber bundle were increased with increasing the molding temperature and achievement ratio of elastic modulus increase. While increasing the molding temperature, the achievement ratio of tensile strength was decreased because of deterioration of jute fiber. The optimum compression molding temperature was 185 - 195C for fabricated the jute spun yarn/PLA unidirection composite. [Copyright &y& Elsevier]

Abstract: Currently, the light has shed on the ecological-friendly products. The mulberry products, especially hand-made paper, are wildly facilitated as general wares or decoration. The research on the lamination of the mulberry paper with biodegradable films can ameliorate the usability, corresponding to the modernisation and green products. Meticulously, the laminating machine is designed and created in this research, with the size 98 x 118 x 126 centimetres. The machine is consisted of the roller driver and the infrared heater. The laminate film will be pulled by the roller driver and be passed the latex glue and infrared heater. Subsequently, the film will be coated on the mulberry paper by the rubber roller. The experimental results show that the best lamination is at speed 3.72 m/min. In addition, the biodegradable film has thickness 40μm and tensile strength is 40.22MPa. Tensile strength of normal mulberry paper is 37.07MPa, but 79.14MPa after the lamination. The laminated mulberry-paper is more attractive, strengthening, and lotus effect. The surface becomes smooth, easily to print and to clean out the dirt. [Copyright &y& Elsevier]