Effect of Yarn Twist on Young’s Modulus of Fully-green Composites Reinforced with Ramie Woven Fabrics

INTRODUCTION Today, development of materials technology using biomass is expected for creation of a sustainable society. Especially, the composite consisting of plant-based natural fibers and biodegradable resin, so-called the fully-green composites, is much expected for practical use. So far, we made textile green composites using biodegradable resin and plain woven ramie fabric and explored the deformation behavior [1]. Generally, it is said that deformation behavior of textile fabrics is dependent on the parameters such as fabric density, crimp angle of yarns, number of yarn twist and so on [2]. On the other hand, it is quite unknown if such dependencies are exhibited in a textile green composite in the same way. This study is thus to explore the effect of yarn twist on mechanical properties of textile green composites. The results showed that a new property inherent in the composites, different from textile fabrics, was found out especially in the change of Young’s modulus.