PURPOSE: To obtain a fiber which possesses the superior soothing and antiphlogistic effect which continues for long time and with which the troublesomeness due to the fixation at an onset can be reduced, by allowing the composite fiber consisting of ethylene - vinyl acetate copolymer(EVAc) resin having a specific melting index and the thermoplastic resin having the higher melting point than that of EVAv to adsorb fluorobiprofen.
CONSTITUTION: One between two melting extruders is charged with the resin (A) having the main constituent of EVAc with a melt index of 2 to 200, and another 2 is charged with the resin (B) which possesses the higher melting point than (A) and the superior stringiness, and the resin is melted and extruded by the extruders, and the polymer stream is sent into a spinning head 6 by gear pumps 3 and 4. Two kinds of polymer streams are compounded by a pack metal fitting installed onto the head so that the yarn surface area of the resin A is 10 to 90%, preferably 20 to 80%, and discharged from a spinneret 5, and formed into fiber form. The compounded yarn is immersed into the vegetable oil in which fluorobiprofen is dissolved, and the fluorobiprofen is absorbed and held in EVAc.
TANAKA KAZUHIKO
KAWAMOTO MASAO
Next Patent: MEDICAL-EFFECTIVE FIBER AND MANUFACTURE THEREOF