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The aim of this study is to prepare polypropylene (PP) / nickel coated carbon fiber (NiCF) or stainless steel (SUS) fiber composites possessing electromagnetic interference (EMI) shielding effectiveness (SE). A series of conductive composites were prepared by the melt blending method. The EMI SE of conductive composites is 45 dB over a wide frequency range up to 100 MHz, which is higher than that of PP/talc composite used automotive interior parts, viz. 0 dB.

Biodegradable headlinings were developed using jute fiber, PLA (polylactic acid) fiber. More specifically, the main felt which consists of jute fibers and PLA fibers was produced by carding process, and then laminating PLA Films or light PLA felts as reinforcement. After lamination, cotton nonwovens were used as skin layers. Evaluation on the biodegradation of headlinings was tested under conditions (KS M 3100-1 and ISO-14855-1) of aerobic biodegradation. The test results of biodegradable headlinings showed a reduction of weight by 48 % and a decrease of mechanical strength by 90% for the biodegradation period. This feature would be attributed to the decomposition of the bio-materials during its biodegradation.