PURPOSE: To obtain a fiber which possesses the superior effect on ischemic heat disease without causing the troublesomeness in the daily life 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 EVAc to adsorb isosorbide nitrate.
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 isosorbide nitrate is dissolved, and the isosorbide nitrate is absorbed and held in EVAc.
TANAKA KAZUHIKO
KAWAMOTO MASAO
