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We studied the use of Bio-plastics (plastics made from plants) such as poly(lactic acid) (PLA) to automotive parts. To apply this material to automotive plastic parts, improvement in heat and impact performance is required. From the viewpoint of suppressing the increase in CO2 emissions, we attempted to improve the performance of PLA by combining with natural fiber. As the result, we could improve both heat and impact performance. In addition, we could achieve higher modulus and lower bulk density, which leads to the weight reduction of automotive parts.

We studied the application of Bio-plastics (plastics made from plants) such as poly(lactic acid) (PLA) to automotive parts. To apply this material to automotive plastic parts, major improvement is required for thermal and impact performance. From the viewpoint of suppressing the increase CO2 emissions, we attempt to improve the performance of PLA by combining with natural fiber. As the result, we could improve both thermal and impact performance. In addition, we could achieve higher modulus and lower bulk density, which lead to the weight reduction of automotive parts.

Carbon fiber reinforced plastic (CFRP) is already used in fields from aerospace to F1 motor racing. As part of the ongoing studies to apply CFRP to series production vehicle body, a new material and method of fabrication have been developed to reduce cost and improve productivity. One issue, however, is the suppression of voids created by the vacuum molding process. This was addressed by developing a knitted fabric and resin with extremely good de-aeration performance. This unique resin was developed as a result of analysis of the flowability required in each molding process. The development achieved a void rate equal to that found in CFRP used in the aerospace industry, with a substantially shorter molding cycle. This material is currently used in Toyota's new flagship Lexus LFA sports car.