JP2562925B2 - Linear object coating device and method for producing coated linear object using the same - Google Patents

Linear object coating device and method for producing coated linear object using the same

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Publication number
JP2562925B2
JP2562925B2 JP63020148A JP2014888A JP2562925B2 JP 2562925 B2 JP2562925 B2 JP 2562925B2 JP 63020148 A JP63020148 A JP 63020148A JP 2014888 A JP2014888 A JP 2014888A JP 2562925 B2 JP2562925 B2 JP 2562925B2
Authority
JP
Japan
Prior art keywords
coating layer
linear object
coating
die
core material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP63020148A
Other languages
Japanese (ja)
Other versions
JPH01194965A (en
Inventor
弘之 速水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Cable Industries Ltd
Original Assignee
Mitsubishi Cable Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Cable Industries Ltd filed Critical Mitsubishi Cable Industries Ltd
Priority to JP63020148A priority Critical patent/JP2562925B2/en
Publication of JPH01194965A publication Critical patent/JPH01194965A/en
Application granted granted Critical
Publication of JP2562925B2 publication Critical patent/JP2562925B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は線状物、特に好ましくは長尺線状物の被覆用
装置、並びにこれを用いた被覆線状物の製法に関し、更
に詳しくは、たとえば光ファイバやイメージガイド用の
マルチプルファイバ等の如き長尺線状物の芯素材に被覆
層を形成する際に使用される被覆用装置、並びにこの装
置を使用して芯素材に被覆層を形成する方法に関する。
TECHNICAL FIELD The present invention relates to an apparatus for coating a linear object, particularly preferably a long linear object, and a method for producing a coated linear object using the same, more specifically, , A coating device used for forming a coating layer on a core material of a long linear object such as an optical fiber or a multiple fiber for an image guide, and a coating layer on the core material using this device. Relates to a method of forming.

〔従来の技術〕[Conventional technology]

長尺線状物、たとえば光ファイバやマルチプルファイ
バの如き長尺線状物は、芯素材に各種の被覆層が形成さ
れる。
A long linear material such as an optical fiber or a multiple fiber has various coating layers formed on a core material.

今長尺線状物の一例として光ファイバを例にとって説
明すると、第1図に示す通り光ファイバ用母材、たとえ
ば石英ガラス光ファイバ用母材の束(1)を溶融線引き
してマルチプルファイバ用芯素材(2)を得、この芯素
材(2)上に一次樹脂被覆層、たとえば紫外線硬化樹脂
やシリコン樹脂の一次被覆層(3)を形成し、キュア炉
(4)でキュアした後、二次被覆層(5)を施し、キュ
ア炉(6)でキュアした後巻取装置(7)で巻取るもの
である。この被覆層を形成する際には、線引装置(8)
を用いて芯素材(2)を得、次いで被覆層形成用装置
(9)、(10)を用いて芯素材(2)上に一次被覆層
(3)、及び必要に応じて二次被覆層(5)を形成す
る。
An optical fiber will now be described as an example of a long linear object. As shown in FIG. 1, a bundle of optical fiber preforms, for example, a bundle of quartz glass optical fiber preforms (1) is melt-drawn and used for multiple fibers. A core material (2) is obtained, a primary resin coating layer, for example, a primary coating layer (3) of an ultraviolet curable resin or a silicone resin is formed on the core material (2), and after curing in a curing furnace (4), The following coating layer (5) is applied, cured in a curing furnace (6), and then wound by a winding device (7). When forming this coating layer, a wire drawing device (8)
To obtain a core material (2), and then using coating layer forming devices (9) and (10), a primary coating layer (3) and, if necessary, a secondary coating layer on the core material (2). (5) is formed.

この被覆装置(9)、(10)の詳細を示す図面が第2
図(イ)であり、第2図中(11)はダイスを示す。この
ような装置に於いて使用されるダイスとして、第2図
(ロ)に示す様なダイス孔(12)の断面が円形でその中
心に芯素材(2)が通過する断面円形の空間を有するも
のがあるが、このようなダイス(11)では被覆層は第2
図(ハ)に示す通り作用、上下いずれかに変位し易く均
一な膜厚の被覆層は形成し難い。またこの変位が著しい
場合には、部分的に被覆層が形成されないという大きな
難点が生じる。
The second drawing shows the details of the coating devices (9) and (10).
It is a figure (a) and (11) in FIG. 2 shows a die. As a die used in such an apparatus, as shown in FIG. 2B, a die hole (12) has a circular cross section, and a center has a space having a circular cross section through which the core material (2) passes. There are some, but in such a die (11), the coating layer is the second
As shown in FIG. 3C, the action is apt to be displaced upward or downward, and it is difficult to form a coating layer having a uniform film thickness. Further, when this displacement is significant, a big problem occurs that the coating layer is not partially formed.

また被覆層として特に耐熱性が要求される場合には、
被覆樹脂としてポリイミドが使用される。このポリイミ
ドを使用する場合は、ポリイミドは加熱されてイミド化
反応を生ずる際に水を発生する。この水は直ちに蒸発す
る。均一層に被覆されている場合は、この発明する水は
層中から蒸発して除去され易いが、偏肉していると厚肉
部に気泡として残留する。長尺線状物がイメージガイド
用マルチプルファイバの場合には、肉厚で形成されるた
め、偏肉すると偏肉部の厚みはかなり大きくなり、この
結果この偏肉部に気泡が残留することとなる。
When heat resistance is particularly required for the coating layer,
Polyimide is used as the coating resin. When this polyimide is used, the polyimide generates water when heated to cause an imidization reaction. This water evaporates immediately. When a uniform layer is coated, the water of the present invention is easily evaporated and removed from the layer, but if it has an uneven thickness, it remains as bubbles in the thick portion. When the long linear object is a multiple fiber for an image guide, it is formed with a large thickness, so if the thickness is uneven, the thickness of the uneven thickness portion becomes considerably large, and as a result, bubbles remain in this uneven thickness portion. Become.

[発明が解決しようとする問題点] 本発明が解決しようとする問題点は、従来の被覆層に
於ける上記難点を解消することであり、更には被覆樹脂
としてポリイミドを使用して、イメージガイド用マルチ
プルファイバを被覆する際の上記難点を解消することで
ある。
[Problems to be Solved by the Invention] A problem to be solved by the present invention is to solve the above-mentioned problems in the conventional coating layer, and further to use an image guide using polyimide as a coating resin. SUMMARY OF THE INVENTION It is to eliminate the above-mentioned difficulties when coating multiple optical fibers for use.

〔問題点を解決するための手段〕[Means for solving problems]

この問題点は、被覆装置として第3図に示す通り、従
来の円形断面のダイス孔を有するダイスに代えて、その
ダイス孔(12)が円形ではなく異形断面を有するダイ
ス、好ましくは3〜8角形、特に好ましくは5〜5角形
の異形断面のダイス孔を有する異形ダイスを使用するこ
とにより解決される。
This problem is that, as shown in FIG. 3 as a coating apparatus, instead of the conventional die having a circular cross-section die hole, the die hole (12) is not circular but has a modified cross-section, preferably 3 to 8 The problem is solved by using profiled dies with die holes of profiled cross-section of polygonal, especially preferably pentagonal to pentagonal.

〔発明の構成並びに作用〕[Structure and Action of Invention]

本発明に於いて使用する被覆層形成用装置は、第3図
に示す通り、従来の被覆用装置の円形ダイスに代えて異
形ダイスを使用したものである。
As shown in FIG. 3, the coating layer forming device used in the present invention uses a modified die instead of the circular die of the conventional coating device.

即ち第3図(イ)並びに(ロ)に示す通り、ダイスの
孔(12)の形状として、たとえば正方形や三角形等の多
角形の断面を有するものを使用する。このような異形断
面のダイス孔(12)を有するダイスを使用することによ
り、芯素材(2)の表面にポリイミド樹脂層を略均一な
膜厚で形成することが出来る。このためイミド化反応に
基づく水の発生及びこの水の蒸発がうまく行われ、発生
する水分はうまく除去される。従ってイメージガイド用
マルチプルファイバとして、気泡が残留することなく、
極めて好都合となる。
That is, as shown in FIGS. 3A and 3B, the hole (12) of the die has a polygonal cross section such as a square or a triangle. By using the die having the die hole (12) having such a modified cross section, the polyimide resin layer can be formed on the surface of the core material (2) with a substantially uniform film thickness. Therefore, the generation of water based on the imidization reaction and the evaporation of this water are successfully performed, and the generated water is well removed. Therefore, as a multiple fiber for image guide, without bubbles remaining,
It will be extremely convenient.

この異形の形状は円形以外であれば良く、通常三角か
ら八角形程度の角形形状、好ましくは四角形で良い。
The irregular shape may be any shape other than a circular shape, and is usually a triangular shape to an octagonal shape, preferably a quadrangular shape.

本発明に於いて被覆層を形成する際の樹脂組成物とし
ては、ポリイミドが使用される。またポリイミドは、特
に耐熱性や強度が要求される場合に使用されるものであ
り、やはり各種の従来からこの種用途に使用されて来た
ものが広く使用される。
Polyimide is used as the resin composition for forming the coating layer in the present invention. Further, polyimide is used particularly when heat resistance and strength are required, and also various polyimides that have been used for this kind of purpose from the past are widely used.

たとえば下記一般式 (但し式中R1およびR2は同一又は相異なって、炭素数約
4〜50、好ましくは6〜20の脂肪族、脂環族、芳香族ま
たは複素環族の4価の有機基を示す。) で表されるイミド基を少なくとも30%モル%含有するも
のが好ましく使用される。
For example, the following general formula (In the formula, R 1 and R 2 are the same or different and each represents an aliphatic, alicyclic, aromatic or heterocyclic tetravalent organic group having about 4 to 50 carbon atoms, preferably 6 to 20 carbon atoms. .) Containing at least 30% mol% of an imide group represented by

このイミド基としては、ジアミンあるいはジイソシア
ネートとテトラカルボン酸又はその誘導体とを反応せし
め、次いで得られたポリアミド酸を加熱してポリイミド
に変化することにより製造されるようなポリイミドのイ
ミド基が使用される。
As the imide group, an imide group of a polyimide which is produced by reacting a diamine or diisocyanate with a tetracarboxylic acid or a derivative thereof and then heating the obtained polyamic acid to be converted into a polyimide is used. .

本発明に於いては、上記特定の被覆形成用装置を使用
する限り、その他の被覆形成方法は従来法に従って行え
ば良い。
In the present invention, as long as the above-mentioned specific coating forming apparatus is used, other coating forming methods may be carried out according to conventional methods.

〔実施例〕〔Example〕

第1図に示すフローシートに従って、第3図の(イ)
に示す正方形のダイス孔断面(12)を有するダイス(1
1)を用いて下記第1表に示す条件で石英ガラスマルチ
プルファイバの被覆を行った。
According to the flow sheet shown in FIG. 1, (a) in FIG.
Dice with square die hole cross section (12) shown in (1
Using 1), silica glass multiple fibers were coated under the conditions shown in Table 1 below.

得られた被覆相は、略々均一な膜厚を有していた。 The obtained coating phase had a substantially uniform film thickness.

〔発明の効果〕〔The invention's effect〕

本発明に依ると、イメージガイド用マルチプルファイ
バをポルイミドの被覆層を形成するに際し、極めて能率
良く、しかも略均一な膜厚の被覆層を形成することが出
来、ポリイミドのイミド化反応に基づく水の発生及び蒸
発が生じても何等気泡が残留することがない。このため
イメージガイド用マルチプルファイバとして極めて望ま
しいものが収得出来、その産業上の効果は大きい。
According to the present invention, when forming a coating layer of polyimide for multiple fibers for image guide, it is possible to form a coating layer of extremely high efficiency and a substantially uniform film thickness, and water based on the imidization reaction of polyimide can be formed. No bubbles remain even if they are generated and evaporated. Therefore, it is possible to obtain a highly desirable image guide multiple fiber, and its industrial effect is great.

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

第1図は、イメージガイト用マルチプルファイバの被覆
形成方法を示すフローシート的模擬説明図であり、第2
図は被覆層形成用装置を示す図面である。第3図は本発
明のダイスの一例を示す図面である。 (1)……石英ガラス母材 (2)……芯素材 (3)……一次被覆層 (4)……キュアー炉 (5)……二次被覆層 (6)……キュアー炉 (7)……巻取り装置 (8)……線引装置 (9)……被覆形成用装置 (10)……被覆形成用装置 (11)……ダイス (12)……ダイス孔
FIG. 1 is a flow sheet-like simulation explanatory view showing a coating forming method of an image guide multiple fiber.
The drawing is a drawing showing an apparatus for forming a coating layer. FIG. 3 is a drawing showing an example of the die of the present invention. (1) …… Quartz glass base material (2) …… Core material (3) …… Primary coating layer (4) …… Cure furnace (5) …… Secondary coating layer (6) …… Cure furnace (7) …… Winding device (8) …… Drawing device (9) …… Coating forming device (10) …… Coating forming device (11) …… Die (12) …… Die hole

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】イメージガイド用マルチプルファイバをポ
ルイミドで被覆する装置に於いて、そのダイス孔として
異形断面を有するダイスを使用したことを特徴とする線
状物被覆装置。
1. A linear object coating apparatus, wherein a die having a modified cross section is used as a die hole in an apparatus for coating a multiple fiber for an image guide with polyimide.
【請求項2】芯素材を線引きした後、その上に連続的に
第1被膜層並びに必要に応じて第2被膜層を形成して芯
素材上にポリイミド被覆層を形成するに際し、上記被覆
層を形成する際の被覆層形成用装置として、そのダイス
孔として異形断面を有するダイスを使用した装置を用い
てイメージガイド用マルチプルファイバを製造すること
を特徴とする被覆線状物の製法。
2. When a core material is drawn and then a first coating layer and optionally a second coating layer are continuously formed on the core material to form a polyimide coating layer on the core material, the coating layer is formed. A method for producing a coated linear material, characterized in that a multiple fiber for an image guide is produced by using an apparatus using a die having an irregular cross section as a die hole as an apparatus for forming a coating layer when forming a film.
JP63020148A 1988-01-29 1988-01-29 Linear object coating device and method for producing coated linear object using the same Expired - Lifetime JP2562925B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63020148A JP2562925B2 (en) 1988-01-29 1988-01-29 Linear object coating device and method for producing coated linear object using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63020148A JP2562925B2 (en) 1988-01-29 1988-01-29 Linear object coating device and method for producing coated linear object using the same

Publications (2)

Publication Number Publication Date
JPH01194965A JPH01194965A (en) 1989-08-04
JP2562925B2 true JP2562925B2 (en) 1996-12-11

Family

ID=12019068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63020148A Expired - Lifetime JP2562925B2 (en) 1988-01-29 1988-01-29 Linear object coating device and method for producing coated linear object using the same

Country Status (1)

Country Link
JP (1) JP2562925B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006150271A (en) * 2004-11-30 2006-06-15 Daicel Chem Ind Ltd Production method of hollow fiber semipermeable membrane

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409263A (en) * 1982-01-27 1983-10-11 Western Electric Co., Inc. Methods of and apparatus for coating lightguide fiber
JPS59105872A (en) * 1982-12-07 1984-06-19 Sumitomo Electric Ind Ltd Apparatus for application of paint onto filament body
JPS6082331A (en) * 1983-10-07 1985-05-10 キ−−テク・インコ−ポレイテッド Method of giving plastic member dyestuff image and image carrying member formed by said method
JPS6128616A (en) * 1984-07-18 1986-02-08 Ozawa Concrete Kogyo Kk Continuous wall of steel sheet pile

Also Published As

Publication number Publication date
JPH01194965A (en) 1989-08-04

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