【発明の詳細な説明】[Detailed description of the invention]
本発明は、紡糸口金の改良に関するものであ
る。
従来、紡糸口金は白金、白金合金、ステンレス
鋼等の材料にて作られているが、紡糸面での紡糸
液の濡れが良過ぎて紡糸液が大きく広がり、得ら
れる糸の形状が不安定となり且つ太さにばらつき
が生じ、所要の形状、寸法の糸を得ることができ
ないという欠点があつた。
本発明は斯かる欠点を解消すべくなされたもの
であり、紡糸面での紡糸液の濡れを抑えて紡糸液
の広がりを防止し、防止中に附着する異物の除去
のために行なうワイピングの作業性の改善をした
紡糸口金を提供せんとするものである。
本発明の紡糸口金は、第１図及び第２図に示す
如く紡糸口金本体１の紡糸面２及びポリマー導入
孔３に連なるポリマー吐出孔４の内面の内の少な
くとも紡糸面２に、カーボンの薄膜５が被覆され
ていることを特徴とするものである。
このように本発明の紡糸口金は、少なくとも紡
糸面２にカーボンの薄膜５が被覆されているの
で、紡糸面２の硬度が著しく高くなり、ワイピン
グ等により吐出口４の表面に傷をつけたりするこ
とがなく又、異物の附着が少なく且つ除去が容易
に行なえるなどワイピング性が良好となり、即ち
紡糸面２の平滑鏡面度が向上せしめられ、紡糸液
の濡れ性が抑制され、その結果紡糸面２での紡糸
液の広がりが防止され、紡糸される糸の形状が安
定し、且つ太さが一定となつて、略所要の形状、
寸法の糸を得ることができる。
特に紡糸面２のみならず、ポリマー吐出孔４の
内面にもカーボンの薄膜５を被覆した場合には、
ポリマー吐出孔４での紡糸液の濡れ性が抑制され
るので、ポリマー吐出孔４から紡糸液が噴出する
ことが無いので、紡糸液の過剰による紡糸液の紡
糸面２での広がりが安全に防止され、防糸される
糸は形状、寸法ともに極めて精度の高いものとな
る。
前記カーボンの薄膜５とは、主としてスパツタ
−カーボンの薄膜を指すが、これに限定されるも
のではなく、炭化物の結晶であつても良いもので
ある。またカーボンの薄膜５の厚さは、通常0.1
〜20μであれば十分である。
次に本発明の紡糸口金の具体的な実施例と従来
例について説明する。
実施例 １
第１図に示す如くステンレス鋼より成る厚さ10
mm、直径80mmの円形の紡糸口金本体１に36個の孔
径２mm、長さ9.6mmのポリマー導入孔３及びそれ
に連なつて孔径200μ、長さ400μのポリマー吐出
孔２を穿設し、紡糸面２に厚さ5μのカーボンの
薄膜５を被覆した紡糸口金。
実施例 ２
第２図に示す如くステンレス鋼より成る厚さ
700μ、直径90mmの円形皿形の紡糸口金本体１の
紡糸面２及び3000個の孔径400μ、深さ620μのポ
リマー導入孔３に連なる孔径80μ、長さ80μのポ
リマー吐出孔４の内面に、厚さ5μのカーボンの
薄膜５を被覆した紡糸口金。
従来例
第３図に示す如くステンレス鋼より成る厚さ
700μ、直径90mmの円形皿形の紡糸口金本体１に
3000個の孔径400μ、深さ620μのポリマー導入孔
３を穿設し、これに連なつて孔径80μ、長さ800μ
のポリマー吐出孔４を穿設した紡糸口金。
然してこれら実施例１、２及び従来例の紡糸口
金で紡糸し、各紡糸面２の濡れ具合及び得られた
糸の形状、寸法を測定した処、下記の表に示すよ
うな結果を得た。
The present invention relates to improvements in spinnerets. Traditionally, spinnerets have been made of materials such as platinum, platinum alloys, and stainless steel, but the spinning surface is too wet with the spinning solution, causing the spinning solution to spread out and the shape of the resulting yarn to be unstable. In addition, there was a drawback that the thickness varied, making it impossible to obtain threads with desired shapes and dimensions. The present invention was made in order to eliminate such drawbacks, and it suppresses the wetting of the spinning solution on the spinning surface to prevent the spinning solution from spreading, and eliminates the wiping operation performed to remove foreign matter that adheres during the prevention. The present invention aims to provide a spinneret with improved properties. As shown in FIGS. 1 and 2, the spinneret of the present invention has a carbon thin film on at least the spinning surface 2 of the spinning surface 2 of the spinneret body 1 and the inner surface of the polymer discharge hole 4 which is connected to the polymer introduction hole 3. 5 is coated. As described above, in the spinneret of the present invention, since at least the spinning surface 2 is coated with the thin carbon film 5, the hardness of the spinning surface 2 is significantly increased, and the surface of the discharge port 4 is not damaged by wiping or the like. In addition, the wiping properties are good, such as less adhesion of foreign substances and easy removal. In other words, the smoothness and specularity of the spinning surface 2 is improved, the wettability of the spinning solution is suppressed, and as a result, the spinning surface 2 The spinning solution is prevented from spreading, the shape of the spun yarn is stabilized, and the thickness is constant, resulting in approximately the required shape,
It is possible to obtain threads of different dimensions. In particular, when not only the spinning surface 2 but also the inner surface of the polymer discharge hole 4 is coated with the carbon thin film 5,
Since the wettability of the spinning solution at the polymer discharge hole 4 is suppressed, the spinning solution will not be spouted from the polymer discharge hole 4, thereby safely preventing the spinning solution from spreading on the spinning surface 2 due to excessive spinning solution. The protected yarn has extremely high precision in both shape and size. The carbon thin film 5 mainly refers to a thin film of sputtered carbon, but is not limited thereto, and may be a carbide crystal. The thickness of the carbon thin film 5 is usually 0.1
~20μ is sufficient. Next, specific examples and conventional examples of the spinneret of the present invention will be described. Example 1 As shown in Fig. 1, the thickness 10 is made of stainless steel.
36 polymer inlet holes 3 with a hole diameter of 2 mm and a length of 9.6 mm and polymer discharge holes 2 with a hole diameter of 200 μm and a length of 400 μm were bored in a circular spinneret body 1 with a diameter of 80 mm and a spinning surface. A spinneret 2 coated with a carbon thin film 5 having a thickness of 5 μm. Example 2 Thickness made of stainless steel as shown in Figure 2
On the inner surface of the spinning surface 2 of the circular dish-shaped spinneret body 1 with a diameter of 700μ and a diameter of 90mm, and on the inner surface of the polymer discharge hole 4 with a hole diameter of 80μ and a length of 80μ, which are connected to the polymer introduction holes 3 of 3000 holes with a diameter of 400μ and a depth of 620μ. A spinneret coated with a thin film 5 of carbon with a diameter of 5μ. Conventional example Thickness made of stainless steel as shown in Figure 3
700μ, diameter 90mm round dish-shaped spinneret body 1
3,000 polymer introduction holes 3 with a hole diameter of 400μ and a depth of 620μ are drilled, and in series, a hole diameter of 80μ and a length of 800μ is drilled.
A spinneret having a polymer discharge hole 4 formed therein. However, when spinning was carried out using the spinnerets of Examples 1 and 2 and the conventional example, and the wetness of each spinning surface 2 and the shape and dimensions of the obtained yarn were measured, the results shown in the table below were obtained.
【表】
上記の表で明らかなように実施例１、２の紡糸
口金は従来の紡糸口金に比し紡糸面での紡糸液の
広がりが著しく少なく且つばらつきの少ないこと
が判る。また実施例１、２の紡糸口金により得ら
れた糸の形状は真円で正常であるのに対し従来例
の紡糸口金により得られた糸の形状は楕円の異常
なものが多い。さらに実施例１、２の紡糸口金に
より得られた糸の寸法は所要寸法との誤差が小さ
いのに対し、従来例の紡糸口金により得られた糸
の寸法は所要寸法との誤差が大きく、寸法精度が
悪いことが判る。
以上の説明で判るように本発明の紡糸口金は、
少なくとも紡糸面にカーボンの薄膜を被覆してあ
るので、紡糸面での紡糸液の濡れが抑えられ、紡
糸液の広がりが防止されるので、紡糸される糸の
形状が安定し、且つ糸の太さが一定となつて、略
所要の寸法、形状の糸を得ることができるという
優れた効果がある。[Table] As is clear from the above table, the spinnerets of Examples 1 and 2 have significantly less spread of the spinning solution on the spinning surface and less variation than conventional spinnerets. Further, the shapes of the yarns obtained using the spinnerets of Examples 1 and 2 are perfect circles and normal, whereas the shapes of the yarns obtained using the conventional spinnerets are often abnormally oval. Furthermore, the dimensions of the yarn obtained using the spinnerets of Examples 1 and 2 have small errors with the required dimensions, whereas the dimensions of the yarn obtained with the conventional spinneret have large errors with the required dimensions. It turns out that the accuracy is poor. As can be seen from the above explanation, the spinneret of the present invention is
At least the spinning surface is coated with a thin carbon film, which suppresses wetting of the spinning solution on the spinning surface and prevents the spinning solution from spreading, which stabilizes the shape of the spun yarn and increases the thickness of the yarn. This has the excellent effect that the yarn has a constant thickness and can have approximately the required size and shape.
【図面の簡単な説明】[Brief explanation of drawings]
第１図は本発明の紡糸口金の一実施例を示す要
部断面図、第２図は本発明の紡糸口金の他の実施
例を示す要部断面図、第３図は従来の紡糸口金を
示す要部断面図である。
１……紡糸口金本体、２……紡糸面、３……ポ
リマー導入孔、４……ポリマー吐出孔、５……カ
ーボンの薄膜。
FIG. 1 is a cross-sectional view of a main part showing one embodiment of a spinneret of the present invention, FIG. 2 is a cross-sectional view of a main part showing another embodiment of a spinneret of the present invention, and FIG. FIG. 1... Spinneret body, 2... Spinning surface, 3... Polymer introduction hole, 4... Polymer discharge hole, 5... Carbon thin film.