JPS5926507A - Spinneret - Google Patents

Abstract

PURPOSE:A spinneret providing uniform hollow yarn free from divergence of the center, preventing the deformation and wear of mandrel, by forming a supporting part in an integrated way from the inner circular faces at the bottom of polymer feed holes to the top of the mandrels in the inside of polymer extrusion holes having ring-shaped form closed partially, adjoining the inner circular faces. CONSTITUTION:In the hollow yarn spinneret 4 having a large number of the spinning holes consisting of the polymer feed holes 1 and the polymer extrusion holes 3 consisting of the polymer feed holes 1 and the polymer extrusion holes 2 having C-shaped form, ring-shaped form closed partially, adjoining them, at equal spaces, the mildly circular supporting parts 8 are formed in an integrated way from the inner circular faces at the bottom of the polymer feed holes 1 through the connecting parts 7 of the mandrels 6 to the top of the mandrels 6 in the inside of the polymer extrusion holes 2, to give the desired spinneret 4'. Since the mandrels 6 are firmly supported by the inside face of the spinning holes 3 in this hollow yarn spinneret 4', the mandrels 6 are not deformed at all even if subjected to the high temperature and high spinning pressure of molten polymer during spinning, so stable spinning is made possible.

Description

【発明の詳細な説明】 本発明は紡糸口金の改良に関する。[Detailed description of the invention] This invention relates to improvements in spinnerets.

例えば従来の中空糸紡糸口金は、第１図に示す如くポリ
マー導入孔１とこれに続くＣ字状の途切れた環状のポリ
マー吐出孔２とより成る紡糸孔３を多数等間隔に有する
もので、この中空糸紡糸口金４のポリマー吐出孔２より
吐出される溶解ポリマーは紡糸直後に断面Ｃ字状の両端
縁が溶着して第２図に示す如く円形の中空糸５となるも
のである。For example, a conventional hollow fiber spinneret has a large number of equally spaced spinning holes 3 consisting of a polymer introduction hole 1 and a C-shaped interrupted annular polymer discharge hole 2, as shown in FIG. Immediately after spinning, the dissolved polymer discharged from the polymer discharge hole 2 of the hollow fiber spinneret 4 has both ends of a C-shaped cross section welded to form a circular hollow fiber 5 as shown in FIG.

ところで上記中空糸紡糸口金４は、ポリマー吐出孔２の
内側の芯金６及びその連結部７の上面が平坦で、しかも
連結部７の幅が細く弱いので、使用当初は第２図に示す
如き正常な中空糸５を得ることができるが、長期間使用
すると、溶解ポリマーの高熱と高い紡糸圧力により芯金
６が第３図に示す如く変形して垂れ下がり、第４図ａに
示す如く肉厚が周方向で差のある。つまり芯ずれした異
常な中空糸５′が得られるものである。さらに芯金６の
垂れ下がりが進行すると、第３図の鎖線の如く脱落し、
その結果第４図すに示す如き異常な中実糸５〃が得られ
るものである。By the way, in the above hollow fiber spinneret 4, the upper surface of the core bar 6 and its connection part 7 inside the polymer discharge hole 2 are flat, and the width of the connection part 7 is thin and weak. Normal hollow fibers 5 can be obtained, but if used for a long period of time, the core bar 6 will deform and sag as shown in FIG. 3 due to the high heat of the melted polymer and high spinning pressure, and the thickness will increase as shown in FIG. There is a difference in the circumferential direction. In other words, an abnormally misaligned hollow fiber 5' is obtained. As the core bar 6 continues to sag, it falls off as shown by the chain line in Figure 3.
As a result, an abnormal solid yarn 5 as shown in FIG. 4 is obtained.

本発明はかかる従来の中空糸紡糸口金のように吐出孔の
一部が途切れた環状の異形吐出孔を有する紡糸口金の欠
点を解決すべくなされたものであり、ポリマー吐出孔の
内側の芯金が決して変形。The present invention has been made in order to solve the disadvantages of spinnerets having an annular irregularly shaped discharge hole with a part of the discharge hole interrupted, such as the conventional hollow fiber spinneret. But never deformed.

脱落することのない紡糸口金を提供せんとするものであ
る。The object is to provide a spinneret that will not fall off.

以下本発明による紡糸口金の実施例を図によって説明す
ると、第５図に示す如くポリマー導入孔ｌとこれに続く
Ｃ字状の途切れた環状のポリマ−吐出孔２とより成る紡
糸孔３を多数等間隔に有する中空糸紡糸口金４′に於い
て、前記ポリマー導入孔１の下部内周面からポリマー吐
出孔２の内側の芯金−６の上面まで芯金６の連結部７を
経由して緩かな円弧状の支持部８を一体に形成して成る
ものである。Hereinafter, an embodiment of the spinneret according to the present invention will be described with reference to the drawings. As shown in FIG. In the hollow fiber spinnerets 4' arranged at regular intervals, from the lower inner circumferential surface of the polymer introduction hole 1 to the upper surface of the core bar 6 inside the polymer discharge hole 2 via the connecting portion 7 of the core bar 6. It is formed by integrally forming a support portion 8 in the shape of a gentle arc.

前記円弧状の支持部８の上面形状は、角形となっている
が、紡糸時の溶解ポリマーの抵抗を減少する上では山形
成いは円弧状になした方が好適である。Although the upper surface shape of the arc-shaped support portion 8 is square, it is preferable to form a mountain or an arc shape in order to reduce the resistance of the dissolved polymer during spinning.

かように構成された本発明の中空糸紡糸口金４は、ポリ
マー吐出孔２の内側の芯金６及びその芯金６の連結部７
の上面にポリマー導入孔ｌの下部内周−に連なる円弧状
の支持部８が一体に設けられて、芯金６が強固に紡糸孔
３の内面に保持されているので、紡糸時溶解ポリマーの
＾熱と＾い紡糸圧力を受けても芯金６は全く変形せず、
長時間草５ 使用しても締金６は垂れ下がったり脱落したりすること
がない。従ってポリマー吐出孔２より吐出される溶解ポ
リマーは紡糸直後に断面Ｃ字状の両端縁が溶着されて第
２図に示す如く内周と外周が同君で、周方向の肉厚の均
一な正常な中空糸５が得られる。The hollow fiber spinneret 4 of the present invention configured as described above has a core bar 6 inside the polymer discharge hole 2 and a connecting portion 7 of the core bar 6.
An arc-shaped support part 8 connected to the lower inner periphery of the polymer introduction hole 1 is integrally provided on the upper surface, and the core bar 6 is firmly held on the inner surface of the spinning hole 3, so that the dissolved polymer is not absorbed during spinning. Even when subjected to heat and spinning pressure, the core metal 6 does not deform at all,
Long-term use 5 The clamp 6 does not sag or fall off even after use. Therefore, immediately after spinning, the melted polymer discharged from the polymer discharge hole 2 has a C-shaped cross section, and both edges are welded together, so that the inner and outer circumferences are the same as shown in Figure 2, and the wall thickness in the circumferential direction is uniform. A hollow fiber 5 is obtained.

上記実施例は溶解紡糸用の中空糸紡糸口金４′の場合で
あるが、第６図に示す如く湿式紡糸用の中空糸紡糸口金
４″の場合もある。Although the above embodiment is a case of a hollow fiber spinneret 4' for melt spinning, a hollow fiber spinneret 4'' for wet spinning may also be used as shown in FIG.

また本発明では、第７図及び第８図に示す如く吐出孔の
一部が途切れた環状の異形吐出孔であれば、中空糸用に
限らず同じ効果が得られる。Further, in the present invention, the same effect can be obtained not only for hollow fibers but also for hollow fibers as long as the discharge hole has an annular irregular shape with a part of the discharge hole cut off as shown in FIGS. 7 and 8.

以上の説明で判るように本発明の紡糸口金は、長期間使
用してもポリマー吐出孔の内側の芯金が決して変形、脱
落することがないので、常に正常な中空糸又は異形糸を
得ることができるので、従来の紡糸口金にとって代わる
ことのできる画期的なものと言える。As can be seen from the above explanation, the spinneret of the present invention never deforms or falls off the core bar inside the polymer discharge hole even if used for a long period of time, so that normal hollow fibers or irregularly shaped fibers can always be obtained. It can be said to be a revolutionary product that can replace conventional spinnerets.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の中空糸紡糸口金の要部を示す一部破断斜
視図、第２図は正常な中空糸の横断面図、第３図は従来
の中空糸紡糸口金に於いてポリマー吐出孔内側の芯金が
変形して垂れ下がった状態を示す要部縦断面図、第４図
ａは第３図に示されるポリマー吐出孔より吐出紡糸され
る異常な中空糸の横断面図、同図すは第３図の鎖線の如
く芯金の脱落したポリマー吐出孔よ−り吐出紡糸される
異常な中実糸の横断面図、第５図は本発明の中空糸紡糸
口金の要部を示す一部破断斜視図、第６図は湿式紡糸用
の本発明による中空糸紡糸口金の要部を示す縦断面図、
第７図及び第８図は本発明に係るポリマー吐出孔の他の
例を示す図である。 ■〜−−−−−ポリマー導入孔、２−−−−−ポリマー
吐出孔、３−−−一紡糸孔、４’、４”−一本発明の中
空糸紡糸口金、６−−−−−芯金、７−〜−−−一連結
部、８１．　支持部。 出願人　　田中貴金属工業株式会社 し、ユビ 第２図 第４図０ 第４図ｂFigure 1 is a partially cutaway perspective view showing the main parts of a conventional hollow fiber spinneret, Figure 2 is a cross-sectional view of a normal hollow fiber, and Figure 3 shows the polymer discharge hole in a conventional hollow fiber spinneret. Fig. 4a is a longitudinal cross-sectional view of the main part showing a state in which the inner core bar is deformed and hanging down, and Fig. 4a is a cross-sectional view of the abnormal hollow fiber spun from the polymer discharge hole shown in Fig. 3 is a cross-sectional view of an abnormal solid fiber discharged and spun from the polymer discharge hole where the core metal has fallen off, as shown by the chain line in FIG. 3. FIG. FIG. 6 is a longitudinal sectional view showing the main parts of the hollow fiber spinneret according to the present invention for wet spinning;
FIGS. 7 and 8 are diagrams showing other examples of polymer discharge holes according to the present invention. ■～---Polymer introduction hole, 2---Polymer discharge hole, 3---One spinning hole, 4', 4''-One Hollow fiber spinneret of the present invention, 6------ Core metal, 7----- series connection part, 81. Support part. Applicant Tanaka Kikinzoku Kogyo Co., Ltd., Ubi Figure 2 Figure 4 0 Figure 4 b

Claims (1)

【特許請求の範囲】[Claims] ポリマー導入孔とこれに続く一部途切れた環状のポリマ
ー吐出孔とより成る紡糸孔を有する紡糸口金に於いて、
前記ポリマー導入孔のＦ部内周面からポリマー吐出孔の
内側の芯金の上面まで支持部を一体に形成したことを特
徴とする紡糸口金。In a spinneret having a spinning hole consisting of a polymer introduction hole and a partially interrupted annular polymer discharge hole,
A spinneret characterized in that a support portion is integrally formed from the inner peripheral surface of the F part of the polymer introduction hole to the upper surface of the core bar inside the polymer discharge hole.