1. Department of Advanced Fibro-Science; Kyoto Institute of Technology; Sakyoku, Kyoto 606-8585 Japan
2. Kaneka US Material Research Center, Kaneka Americas Holding Inc; College Station Texas 77843
3. Center for Fiber and Textile Science, Kyoto Institute of Technology; Sakyoku, Kyoto 606-8585 Japan
4. Frontier Materials Development Laboratories, Kaneka Corporation; Settsu, Osaka 566-0072 Japan