COMPOSITE SPINNERET, CONJUGATED FIBER AND METHOD FOR PRODUCING CONJUGATED FIBER

• Main Authors: YAMAMOTO TAKU, FUNAKOSHI SHOJI, HANAWA TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 25.06.2015
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

PROBLEM TO BE SOLVED: To provide a composite spinneret which can maintain high dimensional stability of a core-sheath part by suppressing defective adhesion between sheath component polymers even when a hole packing density for the core-sheath part is high.SOLUTION: A composite spinneret is used for discharging a core-sheath polymer stream comprising a core component polymer, a sheath component polymer and a third component polymer. The composite spinneret comprises at least one distribution plate 6, a lowermost layer distribution plate 5 and a discharge plate 10 in order toward the downstream side of a polymer spinning path direction. In the distribution plate 6, distribution holes 7 and distribution grooves 8 are formed for distributing the respective core component polymer, sheath component polymer and third component polymer. In the lowermost layer distribution plate 5, there are formed a plurality of core component polymer feed holes 1, a plurality of sheath component polymer feed holes 2 and a plurality of third component polymer feed holes 4. Within this region, the core component polymer feed holes 1 and the sheath component polymer feed holes 2 are formed in such a way that 2 or more of the sheath component polymer feed holes 2 surround respective one core component polymer feed hole 1. 【課題】芯鞘部の孔充填密度が高い場合であっても、鞘成分ポリマー同士の接着不良を抑制し、この芯鞘部の寸法安定性を高く維持できる複合口金。【解決手段】芯成分ポリマー、鞘成分ポリマーおよび第３成分ポリマーで構成される芯鞘ポリマー流を吐出するための複合口金であって、ポリマー紡出経路方向の下流側に向かい順に、１枚以上の分配板６、最下層分配板５および吐出板１０を有し、分配板６には、前記芯成分ポリマー、鞘成分ポリマーおよび第３成分ポリマーをそれぞれ分配するための分配孔７及び分配溝８が形成され、最下層分配板５には、複数の芯成分ポリマー供給孔１、複数の鞘成分ポリマー供給孔２および複数の第３成分ポリマー供給孔４が形成されており、この領域内で２つ以上の鞘成分ポリマー供給孔２が１つの芯成分ポリマー供給孔１を取り囲むように芯成分ポリマー供給孔１及び鞘成分ポリマー供給孔２が形成されている複合口金。【選択図】図１