During the National Tenth Five Year plan, Yantai spandex company has finished the national key technological transformation project---"technological transformation project of differential fiber", and the National Scientific Committee project---"the pilot test project of meta-aramid" etc. As the Shandong Economic and Trade Committee's key technological transformation project, "technological transformation of spandex continuous polymerization technique", "technological transformation of heat resistant spandex", "technolog- ical transformation of high-elongation spandex spinning process", "technological transformation of chlorine resistant spandex spinning process", "technological transformation of differential spandex spinning process" and "technological transformation of dyeable spandex spinning process" etc have been authorized.