JPS598213A - Method of producing conductive linear unit - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は導電性を有する組成物をプラスチック紐に塗布
し、該組成物を照射硬化せしめることシζより導電性線
状体を製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a conductive linear body by applying a conductive composition to a plastic string and curing the composition by irradiation.

最近各種の電子機器や電気機器は小型軽量化が進められ
、導体も細線化、軽量化が求められるようになってきた
。Recently, various electronic and electrical devices have been made smaller and lighter, and conductors have also been required to be thinner and lighter.

従来より基材となる樹脂に銀粉の如き導電性粒子を添加
したものを導電性組成物として用ｂ）ることは、よく知
られている。しかし、十分な導電性を有する組成物を得
るためには基材となる樹脂１００重量部に対して、銀粉
を４００〜５００重量部程度も添加する必要があったた
めに、導電性組成物の価格が比較的高価になり、また、
特に可撓性線状体として使用しようとする場合に於いて
は、銀粉の配合量が増えると可撓性が極端に悪くなり、
銀粉が４００〜５００重量部にもなると、線状体の可撓
性が損なわれて、線状体を折り曲げると導電性塗料部分
が折れて切れてしまうようになり、目的とする可撓性線
状体を作ることができなかった。It has been well known to use (b) a conductive composition prepared by adding conductive particles such as silver powder to a resin serving as a base material. However, in order to obtain a composition with sufficient conductivity, it was necessary to add about 400 to 500 parts by weight of silver powder to 100 parts by weight of the base resin. becomes relatively expensive, and
Especially when it is intended to be used as a flexible linear body, the flexibility becomes extremely poor as the amount of silver powder added increases.
If the amount of silver powder exceeds 400 to 500 parts by weight, the flexibility of the linear body will be impaired, and when the linear body is bent, the conductive paint part will break and break, making it difficult to obtain the desired flexible wire. I couldn't make a shape.

又　カーボンブラックを配合した導電性塗料をプラスチ
ックの紐に塗布して、加熱硬化させてなる半導電性線状
体は、文字通り半導電性であり、導電性の回路用には適
さない。Furthermore, a semiconductive linear body obtained by coating a plastic string with a conductive paint containing carbon black and curing it by heating is literally semiconductive and is not suitable for use in conductive circuits.

本発明は、導電性組成物をプラスチック紐の表面に直接
塗布して導電性線状体を製造する方法に於ける如上の問
題点について検討を進めた結果、達成されたものであっ
て、導電性組成物を直接塗布する方法の長所である、工
程の簡便さを損なうことなく、如上の種々の問題点を解
決した新規な製造方法を提供したものである。The present invention was achieved as a result of studying the above-mentioned problems in the method of manufacturing a conductive linear body by applying a conductive composition directly to the surface of a plastic string. The present invention provides a new manufacturing method that solves the various problems mentioned above without sacrificing the simplicity of the process, which is an advantage of the method of directly applying a sexual composition.

即ち、本発明は導電性組成物をプラスチック紐の表面に
直接塗布して導電性線状体を製造する方法に於いて、基
材となる電子線硬化型樹脂１００重量部に銀粉を８０〜
３００重量部添加して成る組成物をプラスチック紐の表
面に塗布し、これらに電子線を照射して塗料を硬化せし
めた後、加熱処理することを特徴とする導電性線状体の
製造方法に関するものである。That is, the present invention provides a method for manufacturing a conductive linear body by applying a conductive composition directly onto the surface of a plastic string, in which 80 to 80 parts by weight of silver powder is added to 100 parts by weight of an electron beam curable resin serving as a base material.
300 parts by weight of a composition is applied to the surface of a plastic string, irradiated with an electron beam to cure the coating material, and then heat-treated. It is something.

特に、本発明に於いては基材となる電子線硬化型樹脂１
００重量部に対し、銀粉を８０〜８００　　重量部より
好ましくはｉｏｏ〜２５０重量部だけ添加して成る組成
物を用いる。先に述べた如く、従来開示されている技術
に於いては、十分な導電性を有する組成物を得るために
は、銀粉を４００〜５００重量部程度も添加する必要が
あった。ところが、本発明者らは理由は明らかではない
が、電子線硬化型樹脂ｉｏｏ重量部に銀粉を８０′〜３
００　　重量部添加して成る組成物を用いて、プラスチ
ック紐の表面に塗布し、これらに電子線を照射して硬化
せしめた後、加熱処理を行なうことによって、不思議な
ことに、銀粉の添加量が８０〜３００　　重量部と少な
いのにもかかわらず、実用上十分な導電性を有すること
を形成しうることを見出し、本発明を完成するに至った
。In particular, in the present invention, the electron beam curable resin 1 serving as the base material
A composition is used in which 80 to 800 parts by weight, preferably 10 to 250 parts by weight, of silver powder is added to 00 parts by weight. As mentioned above, in the conventionally disclosed technology, in order to obtain a composition having sufficient conductivity, it was necessary to add about 400 to 500 parts by weight of silver powder. However, although the reason is not clear, the present inventors added 80 to 3 parts of silver powder to ioo parts by weight of electron beam curable resin.
By applying a composition containing 00 parts by weight to the surface of a plastic string, curing it by irradiating it with an electron beam, and then heat-treating it, the amount of silver powder added was mysteriously reduced. The present inventors have discovered that it is possible to form a material having practically sufficient conductivity even though the amount is as small as 80 to 300 parts by weight, and the present invention has been completed.

本発明に用いる銀粉は、金属銀を主体とし、フレーク状
或は塊状の形状を有する平均粒度が０．１〜ＩＯμｍ程
度の微細粒子である。銀粉の形状や粒度は特に限定され
ないが、′導電性や塗布作業性或は経済性などを考える
と、形状がフレーク状で、比表面積の大きい粒子を利用
した方が良い。The silver powder used in the present invention is mainly composed of metallic silver, and is fine particles having a flake-like or lump-like shape and an average particle size of about 0.1 to IO μm. Although the shape and particle size of the silver powder are not particularly limited, in consideration of electrical conductivity, coating workability, economic efficiency, etc., it is better to use particles that are flaky in shape and have a large specific surface area.

本発明に於いては、基材となる電子線硬化型樹脂１００
重量部に対して、銀粉を８０〜３００　　重量部添加す
る。添加量が８０重量部に満たないと、十分導電性を有
する線状体を得ることができず、また、添加量が３００
重量部を越えると、導電性については比較的良好となる
が、先に述べた如く、導電性組成物の価格が高くなり、
塗布作業性が低下して出来上がり状況がやや悪くなる傾
向にあり、また特に可撓性が損なわれて線状体を折り曲
げると折れてしまうといった問題が生じる。特に好まし
くは、添加量が１００〜２５０重量部の場合であり、上
に述べたような問題を生じることなく、十分な導電性を
有する線状体を形成することができる。In the present invention, an electron beam curable resin 100 serving as a base material is used.
80 to 300 parts by weight of silver powder is added to each part by weight. If the amount added is less than 80 parts by weight, a linear body having sufficient conductivity cannot be obtained;
If it exceeds parts by weight, the conductivity will be relatively good, but as mentioned earlier, the price of the conductive composition will increase,
There is a tendency for the coating workability to deteriorate and the finished product to be somewhat poor.Furthermore, there is a problem in that the flexibility is particularly impaired and the linear body breaks when bent. Particularly preferably, the amount added is 100 to 250 parts by weight, and a linear body having sufficient conductivity can be formed without causing the above-mentioned problems.

本発明に用いる基材となる電子線硬化型樹脂とは、電子
線を照射することによって硬化反応を起こす官能性を有
する樹脂のことをいい、例えばエポキシ樹脂、ポリウレ
タン樹脂、シリコン樹脂等のポリマーを官能基で変性し
て官能性をもたせたもの、或は不飽和ポリエステル樹脂
、ポリブタジェン樹脂、スピロアセタール樹脂等の如く
分子内に官能性を有するポリマー等の官能性樹脂を用い
る。これらの官能性樹脂は単独或は必要に応じて混合し
て用いる他、官能性を有するモノマーやオリゴマー等も
添加することもできる。特に所要量の銀粉を添加して適
正な塗布作業性を現出するためには、比較的粘度の低い
官能性モノマーやオリゴマーを併用することが効果的で
ある。この他、塗料形態を整えるために粘度調節材料や
着色料などを添加することも可能である。これらの官能
性を有する基材となる樹脂に銀粉を添加して組成物を作
るには、通常塗料を調整する方法により、例えば、ロー
ル混合により均一に十分混練することによって得ること
ができる。The electron beam curable resin that is the base material used in the present invention refers to a resin that has functionality that causes a curing reaction when irradiated with an electron beam, and includes polymers such as epoxy resins, polyurethane resins, and silicone resins. A functional resin such as one modified with a functional group to have functionality, or a polymer having functionality in the molecule such as unsaturated polyester resin, polybutadiene resin, spiroacetal resin, etc. is used. These functional resins may be used alone or in combination if necessary, and functional monomers, oligomers, etc. may also be added. In particular, in order to achieve appropriate coating workability by adding the required amount of silver powder, it is effective to use a functional monomer or oligomer with relatively low viscosity. In addition, it is also possible to add viscosity adjusting materials, colorants, etc. to adjust the paint form. A composition can be prepared by adding silver powder to a resin that serves as a base material having these functionalities, by a method for preparing a coating material, for example, by uniformly and thoroughly kneading it by roll mixing.

プラスチック紐の表面に塗料を塗布する方法は特に限定
されるものではないが、通常用いられるダイスによる塗
布方法が望ましい。特に、本発明に於いては従来開示さ
れている技術に於ける場合と比べ、銀粉の添加量が少な
いので、塗布作業性が良好である。The method of applying the paint to the surface of the plastic string is not particularly limited, but a commonly used application method using a die is preferable. In particular, in the present invention, since the amount of silver powder added is smaller than in the conventionally disclosed technology, the coating workability is good.

プラスチック紐の表面に形成された塗膜は電子線を照射
して硬化せしめる。The coating formed on the surface of the plastic string is cured by irradiating it with electron beams.

電子線照射条件は使用する樹脂に応じて適宜法めるが、
通常５〜３０　Ｍｒａｄ　　程度の線量が好ましい。The electron beam irradiation conditions are determined as appropriate depending on the resin used.
A dose of about 5 to 30 Mrad is usually preferred.

本発明に於いては、線状体を電子線照射により硬化せし
めた後、加熱処理を行なう。本発明に於いては基材とな
る電子線硬化型樹脂１００重量部に対して銀粉を８０〜
８００　　重量部添加して成る組成物を塗布するので、
電子線照射によって塗料が硬化した時点では塗膜の導電
性は十分ではない。し　　−かし、電子線照射による硬
化稜線状体を加熱処理することによって、実用上十分な
導電性を有するようになる。加熱処理の条件は８０〜２
００°Ｃの範囲である。加熱処理温度が８０°Ｃ以下で
は十分な導電性を現出することができず、また２００°
Ｃを越すと熱の影響などで線状体がひずむといった問題
が生じる。望ましくは１００〜１５０°Ｃの範囲が良好
である。又、加熱時間は５分〜６０分程度が良い。In the present invention, after the linear body is hardened by electron beam irradiation, heat treatment is performed. In the present invention, 80 to 80 parts by weight of silver powder is added to 100 parts by weight of the electron beam curable resin as the base material.
Since a composition containing 800 parts by weight is applied,
At the time when the paint is cured by electron beam irradiation, the conductivity of the paint film is not sufficient. However, by heat-treating the hardened ridge-like body by electron beam irradiation, it becomes sufficiently conductive for practical use. Heat treatment conditions are 80-2
The range is 00°C. If the heat treatment temperature is below 80°C, sufficient conductivity cannot be achieved;
If the temperature exceeds C, a problem arises in that the linear body becomes distorted due to the influence of heat. A preferable temperature range is 100 to 150°C. Moreover, the heating time is preferably about 5 minutes to 60 minutes.

本発明にいうプラスチック紐とは、ポリオレフィン、ポ
リエステル、ポリアミド、ポリイミド、ポリウレタンな
どのプラスチック材料からなる糸状、棒状、テープ状、
管状の長尺体あるいはこれらの集束体である。The plastic string referred to in the present invention refers to thread-like, rod-like, tape-like, and
It is a tubular elongated body or a bundle of these bodies.

以下、本発明にもとづく導電性線状体の製造方法を実施
例によって具体的に説明する。EXAMPLES Hereinafter, the method for manufacturing a conductive linear body based on the present invention will be specifically explained with reference to Examples.

実施例１゜ アロニツクスオリゴマー（東亜合成化学工業■オリゴエ
ステルアクリレート商品名）８０重量部及びリポキシ樹
脂（昭和高分子■エポキシアクリレート樹脂商品名）２
０重量部から成る官能性を有する樹脂ベースに、表１　
（ａ）〜（ｆ）に示した如く、金属銀を８０〜８００重
量部を添加して塗料を作り、０．７航〆のポリブチレン
テレフタレートの紐に８０１１ｍ厚さで塗布し、これに
電子線を１５　Ｍｒａｄ　　照射して硬化せしめた。電
子線照射硬化後、塗料の導電性を測定した結果を表１に
示したが、銀粉の添加量が少ない（、）〜（ｃ）では導
電性は認められず、また銀粉の添加量がやや多い（ｄ）
〜（ｆ）では導電性にバラツキが認められた。さらに、
これらの材料を１５０°Ｃで１５分間加熱し、導電性を
測定した結果も表１に合わせて示した。表１で認められ
る如く加熱処理を行なったものは（ａ）は１０４Ω以下
、（ｂ）〜（ｆ）はいずれもｌＯΩ以下の抵抗値を示す
ことがわかった。又、可撓性も良好であり、キンクされ
ても折れることはなく、導電性も低下するなどの異状が
なかった。Example 1 80 parts by weight of Aronix oligomer (Toagosei Chemical Industry ■Oligoester acrylate brand name) and 2 parts of lipoxy resin (Showa Kobunshi ■Epoxy acrylate resin brand name)
Table 1.
As shown in (a) to (f), 80 to 800 parts by weight of metallic silver is added to make a paint, which is applied to a 0.7 mm thick polybutylene terephthalate string to a thickness of 8011 m, and then applied to The wire was irradiated with 15 Mrad to cure. Table 1 shows the results of measuring the conductivity of the paint after curing with electron beam irradiation. No conductivity was observed in cases (,) to (c) where the amount of silver powder added was small, and when the amount of silver powder added was slightly many (d)
~(f), variations in conductivity were observed. moreover,
Table 1 also shows the results of heating these materials at 150°C for 15 minutes and measuring their conductivity. As seen in Table 1, it was found that those subjected to heat treatment exhibited a resistance value of 10@4 Ω or less in (a), and a resistance value of 10 Ω or less in (b) to (f). Further, the flexibility was good, and even if it was kinked, it did not break, and there were no abnormalities such as a decrease in conductivity.

比較例 実施例と同じ樹脂ペースに、表１　（ｇ）〜（ｊ）に示
した如く、金属銀を５０〜７０重量部及び４００〜５０
０−重量部添加して塗料を作り、実施例の場合と同じ表
１゜ 条件で塗布し、電子線照射硬化並びに加熱処理を行ない
、線状体の導電性を調べた。その結果を表１に示した。Comparative Example To the same resin paste as in Example, 50 to 70 parts by weight of metallic silver and 400 to 50 parts by weight of metallic silver were added as shown in Table 1 (g) to (j).
A coating material was prepared by adding 0-part by weight, coated under the same conditions as in the example shown in Table 1, and subjected to electron beam irradiation curing and heat treatment, and the conductivity of the linear body was examined. The results are shown in Table 1.

銀の添加量が少ないＱ）、（ｈ）では電子線照射硬化時
及び加熱処理後とも導電性は認められず−また、添加量
が多い（ｉ）、（Ｄでは電子線照射硬化時に実用上十分
な導電性が得られ、更にこれらを加熱しても特性に顕著
な変化は認められなかつた。但し、（ｉ）、（ｊ）は塗
布性が悪く、表面等の仕上がり状況が悪くなった。又、
折り曲げると塗料が割れ、導電性が低下した。In Q) and (h), which have a small amount of silver added, no conductivity was observed during electron beam irradiation curing and after heat treatment. Sufficient conductivity was obtained, and no significant change in properties was observed even when these were heated.However, (i) and (j) had poor coating properties and poor surface finish. .or,
When bent, the paint cracked and the conductivity decreased.

上述の如く、本発明にもとづく方法に於いては、銀粉を
基材となる樹脂１００重量部に８０〜３００重量部添加
するだけで実用上十分な導電性を現出せしめるので、導
電性組成物の価格が比較的安価であり、塗布作業性が良
好で出来上がり状況が良好であり、また特に良好な可撓
性を得ることができる。As mentioned above, in the method based on the present invention, sufficient conductivity can be achieved by simply adding 80 to 300 parts by weight of silver powder to 100 parts by weight of the base resin, so that the conductive composition The price is relatively low, the coating workability is good, the finished product is good, and particularly good flexibility can be obtained.

又、強度の強いプラスチック紐と組み合わせることによ
り、軽量で細くても強靭な導電性線状体を得ることが出
来るので、工業的な価値は高い。In addition, by combining it with a strong plastic string, it is possible to obtain a lightweight, thin but strong conductive linear body, which has high industrial value.

又、得られた導電性線状体を複数本よりあわせて、より
線の導体として使用することも可能であることは述べる
までもない。Needless to say, it is also possible to strand a plurality of the obtained conductive linear bodies and use them as a stranded conductor.

Claims (1)

【特許請求の範囲】[Claims] （１）電子線硬化型樹脂１００重量部に銀粉を８０〜３
００重量部添加して成る組成物をプラスチック紐の表面
に塗布し５、これらに電子線を照射して硬化せしめた後
、加熱処理することを特徴とする製造方法。(1) Add 80 to 3 parts of silver powder to 100 parts by weight of electron beam curable resin.
A manufacturing method characterized by applying a composition containing 0.00 parts by weight on the surface of a plastic string, curing it by irradiating it with an electron beam, and then heat-treating it.