COMPOSITE SPINNERET, METHOD FOR PRODUCING MULTILAYER LAMINATE FIBER USING THE SAME, AND MULTILAYER LAMINATE FIBER

摘要

PROBLEM TO BE SOLVED: To provide a composite spinneret for producing multilayer laminate fibers comprising multiple filaments in each of which resin layers of multiple polymers are alternately laminated in an annular form.SOLUTION: A composite spinneret 16 comprises: one or more distribution plates 6 in which distribution holes 7 and/or distribution grooves 8 for distributing a first component polymer and a second component polymer are formed; a lowermost-layer distribution plate 5 which is positioned on a downstream side in the polymer spinning path direction of the distribution plates 6, and in which multiple first component polymer discharge holes and multiple second component polymer discharge holes are formed; and a discharge plate 10 which is positioned on a downstream side in the polymer spinning path direction of the lowermost-layer distribution plate 5, and in which composite polymer discharge holes 27 communicating with the first component polymer discharge holes 1 and the second component polymer discharge holes are formed. In the lowermost-layer distribution plate 5, first component polymer discharge hole rows in which at least part of the first component polymer discharge holes are arranged in an annular form and second component polymer discharge hole rows in which at least part of the second component polymer discharge holes are arranged in an annular form are alternately arranged in a surrounding manner to form a discharge hole group.SELECTED DRAWING: Figure 3