Affiliation: | Research Institute for Polymers and Textiles, 1-1-4, Yatabe-Higashi, Tsukuba, Ibaraki-ken 305 Japan;Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Nagatsutacho, Midori-ku, Yokohama 227 Japan;Toyo Joyo Co., Mifuku, Ohito-cho, Shizuoka-ken 410-23 Japan |