JPH0199293A - Heat-shrinkable tube for electromagnetic wave shield - Google Patents
Heat-shrinkable tube for electromagnetic wave shieldInfo
- Publication number
- JPH0199293A JPH0199293A JP25797987A JP25797987A JPH0199293A JP H0199293 A JPH0199293 A JP H0199293A JP 25797987 A JP25797987 A JP 25797987A JP 25797987 A JP25797987 A JP 25797987A JP H0199293 A JPH0199293 A JP H0199293A
- Authority
- JP
- Japan
- Prior art keywords
- copper
- resin
- conductive material
- coated
- heat
- 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.)
- Pending
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000010949 copper Substances 0.000 claims abstract description 44
- 229910052802 copper Inorganic materials 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 41
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 239000007822 coupling agent Substances 0.000 claims abstract description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010936 titanium Substances 0.000 claims abstract description 14
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 14
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 30
- 239000011247 coating layer Substances 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000010445 mica Substances 0.000 description 8
- 229910052618 mica group Inorganic materials 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 239000011162 core material Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- -1 titanate compound Chemical class 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ケーブル等の電線を被覆して内部の導電体を
電磁波を主とした外部の悪影響から保護すると共に、外
部への放射を防止する電磁波シールド用熱収縮チューブ
に関する。Detailed Description of the Invention (Industrial Application Field) The present invention covers electric wires such as cables to protect internal conductors from external harmful effects, mainly electromagnetic waves, and to prevent radiation to the outside. This invention relates to heat-shrinkable tubes for electromagnetic shielding.
（先行の技術）
先行の電磁波シールド用熱収縮チューブとしては、例え
ば、熱可塑性樹脂に導電材が混入された導電性樹脂によ
る導電性シールド樹脂層が内層に形成され、熱可塑性樹
脂による絶縁性シース樹脂層が外層に形成されたものが
提案さている（特願昭６１−１４５６９４号）。(Prior art) As a prior art heat shrink tube for electromagnetic shielding, for example, a conductive shielding resin layer made of a conductive resin mixed with a thermoplastic resin and a conductive material is formed as an inner layer, and an insulating sheath made of a thermoplastic resin is formed. A structure in which a resin layer is formed as an outer layer has been proposed (Japanese Patent Application No. 145694/1982).
（発明が解決しようとする問題点）
しかしながら、上述した先行の熱収縮チューブでは、以
下に述べるような問題点を残していた。(Problems to be Solved by the Invention) However, the above-mentioned prior heat shrinkable tubes still have the following problems.
常温下では所定のシールド効果は得られるものの、低温
（−４０℃）→常温耐高温（９０°Ｃ）→常温というヒ
ートサイクルを繰り返し行うと、導電材同士の接触が離
れて導電性が低下し、この結果、体積抵抗率が高くなり
、シールド効果が低下してしまう。Although a certain shielding effect can be obtained at room temperature, if the heat cycle of low temperature (-40°C) → room temperature high temperature resistance (90°C) → room temperature is repeated, the contact between the conductive materials will separate and the conductivity will decrease. As a result, the volume resistivity increases and the shielding effect decreases.
導電材が銅粉や銅メツキマイカ等の銅材料である場合に
は、コスト的に最も安価であるという利点はあるが、空
気に曝されることによる酸化によって導電性が低下し、
シールド効果が低下する。When the conductive material is a copper material such as copper powder or copper-plated mica, it has the advantage of being the cheapest in terms of cost, but the conductivity decreases due to oxidation due to exposure to air.
Shield effectiveness decreases.
導゛屯材が混入された導電性シールド樹脂層は溶融粘度
が高いので流動性が小さく、低速で押出成形をしないと
薄くて均一な導電性シールド樹脂層が得られにくい。The conductive shielding resin layer mixed with the conductive material has a high melt viscosity and therefore has low fluidity, and it is difficult to obtain a thin and uniform conductive shielding resin layer unless it is extruded at a low speed.
導電性シールド樹脂層の剛性が高いので、ケーブルを被
覆する場合に収縮しにくい。Since the conductive shield resin layer has high rigidity, it is difficult to shrink when covering the cable.
チューブをケーブルに被覆した被覆シールドケーブルは
屈曲性に乏しく、使用しにくいと共に、亀裂が生じ易く
てシールド効果が不完全となることがある。A coated shielded cable in which a cable is covered with a tube has poor flexibility and is difficult to use, and is also prone to cracking, resulting in incomplete shielding.
（問題点を解決するための手段）
本発明は、上述のような問題点を解決するためになされ
たもので、そのために本発明では、熱収縮性樹脂を素材
とした中空筒状のチューブであって、内側には熱可塑性
樹脂に銅被覆導電材が混入された導電性樹脂による導電
性シールド樹脂層が形成され、外側には熱可塑性樹脂の
みによる絶縁性シース樹脂層が形成され、かつ前記銅被
覆導電材の銅皮膜表面に、モノアルコキシ基を有する有
機チタン系カップリング剤の被覆層が形成された電磁波
シールド用熱収縮チューブとした。(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems, and for this purpose, in the present invention, a hollow cylindrical tube made of a heat-shrinkable resin is used. A conductive shielding resin layer made of a conductive resin containing a thermoplastic resin mixed with a copper-coated conductive material is formed on the inside, and an insulating sheath resin layer made only of a thermoplastic resin is formed on the outside. A heat-shrinkable tube for electromagnetic shielding was prepared in which a coating layer of an organic titanium-based coupling agent having a monoalkoxy group was formed on the surface of a copper coating of a copper-coated conductive material.
（作用） 本発明の電磁波シールド用熱収縮チューブでは。(effect) In the heat shrinkable tube for electromagnetic shielding of the present invention.
導電性シールド樹脂層に混入される銅被覆導電材の銅皮
膜表面に、モノアルコキシ基を有する有機チタン系カッ
プリング剤の被ｖＩＩ層が形成されている。A vII layer of an organic titanium-based coupling agent having a monoalkoxy group is formed on the surface of the copper film of the copper-coated conductive material mixed into the conductive shielding resin layer.
従って、ヒートサイクルの繰り返しによる急激な温度変
化が、この導電性シールド樹脂層に作用して、熱可塑性
樹脂と銅との熱膨張率の差により銅被覆導電材同士の接
触が離れても、その周りにはモノアルコキシ基を有する
有機チタン系カップリング剤が介在しているため１通電
によってそのカップリング剤中の電子が流れ、全体とし
て導電性が保持される。Therefore, even if rapid temperature changes due to repeated heat cycles act on this conductive shielding resin layer and the copper-coated conductive materials separate from each other due to the difference in thermal expansion coefficient between the thermoplastic resin and copper, the Since an organic titanium-based coupling agent having a monoalkoxy group is present around it, electrons in the coupling agent flow with one energization, and conductivity is maintained as a whole.
又、銅皮膜表面が被覆層で覆われているので。Also, the surface of the copper film is covered with a coating layer.
銅皮膜が空気中の酸素等と反応することによる酸化が防
止される。Oxidation caused by the reaction of the copper film with oxygen in the air is prevented.
又、有機チタン系カップリング剤によって導電性樹脂に
流動性が付与され、チューブ成形に際しての押出成形が
高速で行えるようになるし、チューブに可撓性が生じる
ので、ケーブルへの被覆作業が簡単になると共に、チュ
ーブをケーブルに被覆した被覆シールドケーブルに屈曲
性が得られる。In addition, the organic titanium-based coupling agent imparts fluidity to the conductive resin, allowing extrusion molding to be performed at high speed when forming tubes, and making the tube flexible, making it easy to coat cables. At the same time, flexibility can be obtained in the shielded cable in which the cable is covered with a tube.
（実施例） 以下１本発明の実施例を図面により詳述する。(Example) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
まず、第１図に示す電磁波シールド用熱収縮チューブＡ
についてその構成を説明する。First, heat shrink tube A for electromagnetic shielding shown in Figure 1
The structure of this will be explained.
この熱収縮チューブＡは、円筒チューブであって、絶縁
性シース樹脂層１と導電性シールド樹脂にり２との二層
構造になっている。This heat-shrinkable tube A is a cylindrical tube, and has a two-layer structure of an insulating sheath resin layer 1 and a conductive shield resin layer 2.
前記絶縁性シース樹脂層１は、熱可塑性樹脂であるポリ
オレフィンのみによるもので、チューブの外側に形成さ
れる。The insulating sheath resin layer 1 is made only of polyolefin, which is a thermoplastic resin, and is formed on the outside of the tube.
導電性シールド樹脂層２は、ポリオレフィンが８０％、
銅被覆導電材２１が２０％のボリューム比で混合された
導電性樹脂によるもので、前記絶縁性シース樹脂層１と
同心円状でチューブの内側に形成される。The conductive shield resin layer 2 is made of 80% polyolefin,
A copper-coated conductive material 21 is made of a conductive resin mixed at a volume ratio of 20%, and is formed concentrically with the insulating sheath resin layer 1 inside the tube.
尚、熱収縮チューブＡの素材として用いられる熱可塑性
樹脂としては、ポリオレフィンの代わりに、ポリ塩化ビ
ニル、架橋ポリエチレン、天然ゴム、ブチルゴム、エチ
レンプロピレンゴム、ネオプレンゴム等が挙げられる。In addition, examples of the thermoplastic resin used as the material for the heat-shrinkable tube A include polyvinyl chloride, crosslinked polyethylene, natural rubber, butyl rubber, ethylene propylene rubber, neoprene rubber, etc. instead of polyolefin.
又、熱可塑性樹脂に対する銅被覆導電材２１の混合率は
、電磁波シールド性を考慮した上で、１０〜３Ｑｖｏ１
２％が適切である。In addition, the mixing ratio of the copper-coated conductive material 21 to the thermoplastic resin is 10 to 3 Qvo1, taking into consideration electromagnetic shielding properties.
2% is appropriate.
そして、前記銅被覆導電材２１は、第２図に示すように
、芯部材料２２としてのガラス繊維の表面に銅メタライ
ズにより銅皮膜２３が形成され、この銅皮膜２３の表面
にモノアルコキシ基プリング剤による被ｒｌ１層２４が
形成されたものである。As shown in FIG. 2, the copper-coated conductive material 21 has a copper film 23 formed by copper metallization on the surface of the glass fiber serving as the core material 22, and a monoalkoxy group pulled on the surface of the copper film 23. A rl1 layer 24 coated with the agent is formed.
ここで、芯部材２２としてはガラス繊維のほか、カーボ
ン繊維やマイカ、ガラス、カーボン等のフレーク粉状材
料を用いることができる。Here, as the core member 22, in addition to glass fiber, flake powder materials such as carbon fiber, mica, glass, and carbon can be used.
又、銅皮膜処理としての銅メタライズには、メツキ、真
空蒸着、スパッタリング法等があり、これらの方法で０
．２〜５．０μｍの銅皮膜２３が施されている。In addition, copper metallization as a copper film treatment includes plating, vacuum evaporation, sputtering, etc., and these methods can achieve zero
．． A copper film 23 of 2 to 5.0 μm is applied.
又、モノアルコキシ基を有する有機チタン系カップリン
グ剤としては、下記の有機チタネート化合物が、銅被覆
導電材２１に対し０．１〜１０重量％、好ましくは、０
．５〜５重量％で用いられている。Further, as the organic titanium-based coupling agent having a monoalkoxy group, the following organic titanate compound may be used in an amount of 0.1 to 10% by weight, preferably 0% by weight, based on the copper-coated conductive material 21.
．． It is used at 5 to 5% by weight.
尚、上記（イ）の例としては、「プレンアクトＫＲＴＴ
ＳＪ 、（ロ）の例としては、「プレンアクトＫＲ９Ｓ
Ｊ−（ハ）の例としては、「プレンアクトＫＲ１２Ｊ
があり、この他プレンアクトＫＲ２’Ｓ。Incidentally, as an example of (a) above, “Plain Act KRTT
As an example of SJ, (b), “Plain Act KR9S
An example of J-(c) is "Plain Act KR12J
There is also a plain act KR2'S.
ＫＲ７，ＫＲＩＩがある（プレンアクト：味の素（株）
商標）。There are KR7 and KRII (Plain Act: Ajinomoto Co., Inc.)
trademark).
又、有機チタン系カップリング剤の被覆処理法としでは
、浸漬、スプレー、混合等で塗布乾燥させるようにして
いる。Further, as a coating treatment method for organic titanium-based coupling agents, coating and drying are performed by dipping, spraying, mixing, etc.
次に、熱収縮チューブの製造方法の例を説明する。Next, an example of a method for manufacturing a heat shrink tube will be explained.
！Ｉｔ２造例−１
フレーク径１００ミクロンのマイカを芯部材料とし、こ
れに化学銅メツキ及び電気銅メツキを施し、これを直ち
に水洗、乾燥させたのち、銅メツキマイカ１００重量部
と、プレンアクトＫＲＴＴＳ ３重量部をメチルエチル
ケトン３０重量部に溶解したカップリング剤とをリボン
ミキサーで混合し乾燥させて、銅メツキマイカの銅メツ
キ表面にカップリング剤による被覆層を形成する。次に
、この被覆層を形成した銅メツキマイカ４００重量部エ
チレン−エチルアクレート共重合樹脂１００重量部に配
合して混練し、これを押出機により、絶縁性シース樹脂
層を形成する熱可塑性樹脂と共に押出してチューブ状に
成形した。! It2 production example-1 Mica with a flake diameter of 100 microns is used as the core material, and chemical copper plating and electrolytic copper plating are applied to this, which is immediately washed with water and dried, and then 100 parts by weight of copper-plated mica and 3 parts by weight of Plain Act KRTTS are added. and a coupling agent dissolved in 30 parts by weight of methyl ethyl ketone are mixed with a ribbon mixer and dried to form a coating layer of the coupling agent on the copper-plated surface of the copper-plated mica. Next, 400 parts by weight of the copper-plated mica that formed the coating layer were mixed with 100 parts by weight of the ethylene-ethyl acrylate copolymer resin, and kneaded together with the thermoplastic resin that formed the insulating sheath resin layer using an extruder. It was extruded and formed into a tube.
製造例−２
ガラス繊維を芯部材料とし、これに銅メツキを施したの
ち水洗、乾燥し、これを３ミリメータのチョツプドスト
ランドにカットし、このカットしたものに製造例−１と
同様にプレンアクトＫＲＴＴＳによるカップリング剤で
表面処理を施して被覆層を形成する。次に、この被覆層
を形成した銅メツキガラス繊維２００重量部を、エチレ
ン−エチルアクレート共重合樹脂１００重量部に配合し
、製造例−１と同様にチューブ状に成形した。Production Example-2 Glass fiber is used as the core material, and after copper plating is applied to it, it is washed with water, dried, and cut into 3 mm chopped strands. A coating layer is formed by surface treatment with a coupling agent using PreneAct KRTTS. Next, 200 parts by weight of the copper-plated glass fibers forming this coating layer were blended with 100 parts by weight of ethylene-ethyl acrylate copolymer resin, and formed into a tube in the same manner as in Production Example-1.
尚、上述のようにして製造した熱収縮チューブを使用す
るには、第３図に示すように、この熱収縮チューブＡ内
にケーブルＢを挿通し、その上で熱収縮チューブＡに外
側から２００〜２５０℃の熱風Ｃを均等に吹付けて、熱
収縮チューブＡを収縮させ、ケーブルＢに熱収縮チュー
ブＡを気密状に被覆させることになる。In order to use the heat-shrinkable tube manufactured as described above, as shown in FIG. Hot air C of ~250° C. is evenly blown to shrink the heat-shrinkable tube A, so that the cable B is covered with the heat-shrinkable tube A in an airtight manner.
以下に示す表は、耐記製造例−１及び製造例−２で製造
した熱収縮チューブの熱収縮後、経時変化後（１０００
Ｈｒ）、ヒートサイクル後（−４０℃Ｘ Ｉ Ｈｒ−＋
室温Ｘ ５ ｗｉｎ−＋ ９０℃ＸＩＨｒ−）室温Ｘ５
１１ｉｎを６サイクル）のそれぞれについて体積抵抗率
を測定した結果を示している。The table below shows the heat shrinkage tubes manufactured in Durable Production Example-1 and Production Example-2 after heat shrinkage and after changes over time (1000
Hr), after heat cycle (-40℃X I Hr-+
Room temperature X 5 win-+ 90℃XIHr-) Room temperature X5
11 inches for 6 cycles).
この表において、比較例−１は、製造例−１の銅メツキ
マイカにおいて、プレンアクトＫＲＴＴＳによるカップ
リング剤で被覆層を形成しない場合の例で、又、比較例
−２は、製造例−２の銅メツキガラス繊維において、同
様に被覆層を形成しない場合の例である。In this table, Comparative Example-1 is an example in which a coating layer is not formed using a coupling agent of Pre-Act KRTTS in the copper-plated mica of Production Example-1, and Comparative Example-2 is an example of the copper-plated mica of Production Example-2. This is an example of plating glass fiber in which no covering layer is similarly formed.
以−ヒのように１本実施例の熱収縮チューブＡは、導電
性シールド樹脂層２に混入される銅被覆導電材２１の銅
皮膜２３表面に、モノアルコキシ基を有する有機チタン
系カップリング剤の被覆層２４が形成されたもので、こ
れらのカップリング剤は、カーレボキシル基 −Ｔｉ−
０−Ｃ−
〇
スルホニル基 −Ｔ ｉ −０−Ｓ −ホスファイト基
−Ｔｉ−０−Ｐ−
を有する。As described below, the heat-shrinkable tube A of this embodiment has an organic titanium-based coupling agent having a monoalkoxy group on the surface of the copper film 23 of the copper-coated conductive material 21 that is mixed into the conductive shielding resin layer 2. A coating layer 24 of
It has 0-C- 〇sulfonyl group -T i -0-S -phosphite group -Ti-0-P-.
従って、本実施例の熱収縮チューブＡでは、前記した表
で示すように、経時変化後、ヒートサイクル後において
も体積抵抗率の上昇はほとんど認められず、シールド効
果の劣化がない。これは、ヒートサイクルを行うことに
より、導電性シールド樹脂層２を形成するポリオレフィ
ン樹脂と銅被覆導電材２１との熱膨張率の差によって、
銅被覆導電材２１．２１同士の接触が離れても、その周
りにモノアルコキシ基を有する有機チタン系カップリン
グ剤が介在しているため、このカップリング剤を介して
導電性樹脂の導電性が保持されるからである。Therefore, in the heat-shrinkable tube A of this example, as shown in the table above, almost no increase in volume resistivity is observed even after changes over time and after heat cycles, and there is no deterioration in the shielding effect. This is due to the difference in thermal expansion coefficient between the polyolefin resin forming the conductive shield resin layer 2 and the copper-coated conductive material 21 by performing a heat cycle.
Even if the copper-coated conductive materials 21.21 are separated from each other, the organic titanium coupling agent having a monoalkoxy group exists around them, so the conductivity of the conductive resin is maintained through this coupling agent. This is because it is retained.
尚、この有機チタン系カップリング剤を導電性シールド
樹脂層２内に、配合時に混合添加すると、シールド効果
がより一層向上する。Incidentally, if this organic titanium-based coupling agent is mixed and added into the conductive shielding resin layer 2 at the time of compounding, the shielding effect is further improved.
又、銅被覆導電材２１の銅皮膜２３表面が被覆層２４で
覆われているので、銅皮膜２３の酸化を防止できる。Furthermore, since the surface of the copper film 23 of the copper-coated conductive material 21 is covered with the coating layer 24, oxidation of the copper film 23 can be prevented.
又、銅被覆導電材２１を含む導電性樹脂が有機チタン系
カップリング剤によって流動性をもつことになり、これ
によってチューブ成形時の押出成形が高速で行えるよう
になるし、又、成形後のチューブに可撓性が付与される
ので、ケーブルへの被覆作業が簡単になると共に、チュ
ーブ被覆された被覆シールドケーブルに屈曲性が得られ
る。In addition, the conductive resin containing the copper-coated conductive material 21 has fluidity due to the organic titanium-based coupling agent, which enables high-speed extrusion molding during tube molding, and Since flexibility is imparted to the tube, the work of covering the cable becomes easier, and flexibility is provided to the tube-covered shielded cable.
（発明の効果）
以上説明してきたように、本発明の電磁波シールド用熱
収縮チューブにあっては、導電性シールド樹脂層に混入
される銅被覆導電材の銅皮膜表面に、モノアルコキシ基
を有する有機チタン系カップリング剤の被覆層が形成さ
れているので、銅被覆導電材の酸化を防止でき、コスト
的に最も安価な銅を導電材として用いることができる。(Effects of the Invention) As explained above, in the heat-shrinkable tube for electromagnetic shielding of the present invention, the copper coating surface of the copper-coated conductive material mixed into the conductive shielding resin layer has a monoalkoxy group. Since the coating layer of the organic titanium-based coupling agent is formed, oxidation of the copper-coated conductive material can be prevented, and copper, which is the cheapest in terms of cost, can be used as the conductive material.
又、長期に亘って体積抵抗率が安定し、かつヒートサイ
クル後においても導電性を保持することができるので、
電磁波シールド効果の劣化を防止することができ、自動
車のエンジンルーム内や航空機等の苛酷な温度変化を伴
う場所でも有効に使用できる。In addition, the volume resistivity is stable over a long period of time, and the conductivity can be maintained even after heat cycles.
It can prevent deterioration of the electromagnetic shielding effect and can be effectively used in places with severe temperature changes, such as in the engine room of a car or an aircraft.
又、導電性樹脂に流動性が付与されるので押出成形時の
高速化が図れるし、チューブに可撓性が付与されるので
、被覆作業時の取扱いが容易になると共に、被覆シール
ドケーブルに屈曲性が得られるし、亀裂の発生を防止で
きるという効果が得られる。In addition, the conductive resin has fluidity, which allows for faster extrusion molding, and the flexibility of the tube, which makes it easier to handle during sheathing work, as well as making it easier to bend the sheathed cable. The effect of this is that it provides good properties and prevents the occurrence of cracks.
第１図は本発明実施例の熱収縮チューブを示す断面図、
第２図は該熱収縮チューブの要部となる銅被覆導電材の
断面図、第３図は該熱収縮チューブの使用例を示す図で
ある。
Ａ：熱収縮チューブ
１：絶縁性シース樹脂層
２：導電性シールド樹脂層
２１：銅被覆導電材
２３：銅皮膜
２４：被覆層FIG. 1 is a sectional view showing a heat shrinkable tube according to an embodiment of the present invention;
FIG. 2 is a sectional view of a copper-coated conductive material which is a main part of the heat-shrinkable tube, and FIG. 3 is a diagram showing an example of how the heat-shrinkable tube is used. A: Heat shrink tube 1: Insulating sheath resin layer 2: Conductive shield resin layer 21: Copper coated conductive material 23: Copper film 24: Covering layer
Claims (1)
って、内側には熱可塑性樹脂に銅被覆導電材が混入され
た導電性樹脂による導電性シールド樹脂層が形成され、
外側には熱可塑性樹脂のみによる絶縁性シース樹脂層が
形成され、かつ前記銅被覆導電材の銅皮膜表面に、モノ
アルコキシ基を有する有機チタン系カップリング剤の被
覆層が形成されていることを特徴とする電磁波シールド
用熱収縮チューブ。1) A hollow cylindrical tube made of heat-shrinkable resin, on the inside of which a conductive shielding resin layer is formed of a conductive resin in which a copper-coated conductive material is mixed with a thermoplastic resin,
An insulating sheath resin layer made of only thermoplastic resin is formed on the outside, and a coating layer of an organic titanium-based coupling agent having a monoalkoxy group is formed on the surface of the copper coating of the copper-coated conductive material. Features heat shrinkable tube for electromagnetic shielding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25797987A JPH0199293A (en) | 1987-10-12 | 1987-10-12 | Heat-shrinkable tube for electromagnetic wave shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25797987A JPH0199293A (en) | 1987-10-12 | 1987-10-12 | Heat-shrinkable tube for electromagnetic wave shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0199293A true JPH0199293A (en) | 1989-04-18 |
Family
ID=17313863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25797987A Pending JPH0199293A (en) | 1987-10-12 | 1987-10-12 | Heat-shrinkable tube for electromagnetic wave shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0199293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456437A (en) * | 2010-10-26 | 2012-05-16 | 富士康(昆山)电脑接插件有限公司 | Cable, heat-shrinkable tube with shielding function and manufacturing method for cable |
-
1987
- 1987-10-12 JP JP25797987A patent/JPH0199293A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456437A (en) * | 2010-10-26 | 2012-05-16 | 富士康(昆山)电脑接插件有限公司 | Cable, heat-shrinkable tube with shielding function and manufacturing method for cable |
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