JPH0149612B2 - - Google Patents
Info
- Publication number
- JPH0149612B2 JPH0149612B2 JP56179265A JP17926581A JPH0149612B2 JP H0149612 B2 JPH0149612 B2 JP H0149612B2 JP 56179265 A JP56179265 A JP 56179265A JP 17926581 A JP17926581 A JP 17926581A JP H0149612 B2 JPH0149612 B2 JP H0149612B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- tape
- film
- polyethylene
- carbon
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 75
- 239000000057 synthetic resin Substances 0.000 claims description 75
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 229920005989 resin Polymers 0.000 claims description 29
- 239000011347 resin Substances 0.000 claims description 29
- 229910052799 carbon Inorganic materials 0.000 claims description 28
- 229920001169 thermoplastic Polymers 0.000 claims description 25
- 239000004416 thermosoftening plastic Substances 0.000 claims description 25
- 239000004698 Polyethylene Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 21
- 238000010894 electron beam technology Methods 0.000 claims description 19
- 229920001038 ethylene copolymer Polymers 0.000 claims description 17
- 238000004132 cross linking Methods 0.000 claims description 11
- 239000010410 layer Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920006257 Heat-shrinkable film Polymers 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 150000001721 carbon Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3412—Insulators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、導電性と熱収縮性と耐熱性とを兼備
する合成樹脂フイルムからなる電線被覆用テープ
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tape for covering electric wires made of a synthetic resin film that has electrical conductivity, heat shrinkability, and heat resistance.
［従来の技術］
電波障害の発生を防止するために、電線に合成
樹脂フイルムと各種の金属箔とを巻き付け、被覆
することによつて、電線から発生する電磁波や外
部から侵入する電磁波の遮蔽を行なう方法が利用
されている。[Prior art] In order to prevent the occurrence of radio wave interference, electric wires are wrapped and covered with synthetic resin film and various metal foils to shield electromagnetic waves generated from the wires and electromagnetic waves entering from the outside. method is used.
［発明が解決しようとする課題］
ところで、前記従来の合成樹脂フイルムと各種
の金属箔とを電線に巻き付ける方法においては、
これを緊縛状態に巻き付けることが困難であり、
また、巻き付けの操作自体が煩雑である等の欠点
を有している。[Problems to be Solved by the Invention] By the way, in the conventional method of wrapping a synthetic resin film and various metal foils around an electric wire,
It is difficult to wrap this in bondage,
Further, it has a drawback that the winding operation itself is complicated.
これに対して、本第１〜２の発明は、電磁波遮
蔽性と、簡単に緊縛状態に巻き付けることのでき
る熱収縮性と、優れた耐熱性とを兼備するバラン
スのとれた電線被覆用のテープを提供するもので
ある。 In contrast, the first and second inventions provide a well-balanced tape for covering electric wires that has electromagnetic wave shielding properties, heat shrinkability that can be easily wrapped in a binding state, and excellent heat resistance. It provides:
［課題を解決するための手段］
本第１の発明は、ポリエチレンまたはエチレン
共重合体からなる熱可塑性合成樹脂95〜50wt.％
とカーボン５〜50wt.％とによる熱可塑性合成樹
脂テープであり、しかも、前記熱可塑性合成樹脂
には、該樹脂の百分率で示されるゲル分率で５〜
90wt.％の架橋度の架橋構造が、電子線の照射処
理によつて導入されており、かつ、前記熱可塑性
合成樹脂テープの軟化温度での10〜90％の熱収縮
率が、延伸配向によつて導入されているものであ
る。[Means for Solving the Problems] The first invention uses a thermoplastic synthetic resin of 95 to 50 wt.% made of polyethylene or ethylene copolymer.
and 5 to 50 wt.% of carbon, and the thermoplastic synthetic resin has a gel fraction of 5 to 50 wt.%, expressed as a percentage of the resin.
A crosslinked structure with a degree of crosslinking of 90wt.% is introduced by electron beam irradiation treatment, and the thermoplastic synthetic resin tape has a heat shrinkage rate of 10 to 90% at the softening temperature due to the stretching orientation. Therefore, it has been introduced.
また、本第２の発明は、ポリエチレンまたはエ
チレン共重合体からなる熱可塑性合成樹脂95〜
50wt.％とカーボン５〜50wt.％とによる導電性合
成樹脂層と、前記導電性合成樹脂層におけるポリ
エチレンまたはエチレン共重合体からなる熱可塑
性合成樹脂と同一の合成樹脂のみによつて形成さ
れている絶縁性合成樹脂層との熱可塑性合成樹脂
積層テープであり、前記導電性合成樹脂層と絶縁
性合成樹脂層とにおける合成樹脂には、該樹脂の
百分率で示されるゲル分率で５〜90wt.％の架橋
度の架橋構造が、電子線の照射処理によつて導入
されており、かつ、前記熱可塑性合成樹脂テープ
の軟化温度での10〜90％の熱収縮率が、延伸配向
によつて導入されているものである。 Further, the second invention provides a thermoplastic synthetic resin 95-95 made of polyethylene or ethylene copolymer.
A conductive synthetic resin layer consisting of 50 wt.% and carbon 5 to 50 wt.%, and a thermoplastic synthetic resin made of polyethylene or ethylene copolymer in the conductive synthetic resin layer. It is a thermoplastic synthetic resin laminated tape with an insulating synthetic resin layer, and the synthetic resin in the conductive synthetic resin layer and the insulating synthetic resin layer has a gel fraction of 5 to 90 wt expressed as a percentage of the resin. A crosslinked structure with a crosslinking degree of .% is introduced by electron beam irradiation treatment, and the thermoplastic synthetic resin tape has a heat shrinkage rate of 10 to 90% at the softening temperature due to stretching orientation. This is what has been introduced.
前記構成からなる本名発明の電線被覆用テープ
において、ポリエチレンまたはエチレン共重合体
による樹脂層には、例えば、低密度ポリエチレ
ン、中密度ポリエチレン、高密度ポリエチレン、
リニヤー低密度ポリエチレン等のポリエチレン、
エチレン−酢酸ビニル共重合体、エチレン−酢酸
ビニル共重合体の鹸化物、、エチレン−カルボン
酸共重合体、エチレン−α・オレフイン共重合
体、アイオノマー等のエチレン共重合体、さらに
は、これらのものの２種以上の混合樹脂等が使用
され、特に、カルボン酸がグラフト共重合等の手
段で導入されているエチレン共重合体の場合に
は、該樹脂とカーボンとの間の相溶性が高く、均
質性において優れた作用を有する電線被覆用テー
プとなる。 In the electrical wire covering tape of the present invention having the above structure, the resin layer made of polyethylene or ethylene copolymer may include, for example, low density polyethylene, medium density polyethylene, high density polyethylene,
Polyethylene such as linear low density polyethylene,
Ethylene copolymers such as ethylene-vinyl acetate copolymers, saponified ethylene-vinyl acetate copolymers, ethylene-carboxylic acid copolymers, ethylene-α-olefin copolymers, and ionomers, as well as these When a mixed resin of two or more types of carbon is used, especially in the case of an ethylene copolymer into which carboxylic acid is introduced by means such as graft copolymerization, the compatibility between the resin and carbon is high; This is a tape for covering electric wires that has excellent homogeneity.
また、前記導電性樹脂層中におけるカーボン
は、該樹脂層に導電性をもたらすものであり、例
えば、アセチレンブラツク、フアーネスブラツ
ク、ケツチエンブラツク等のカーボンが利用され
る。 Further, the carbon in the conductive resin layer provides conductivity to the resin layer, and for example, carbon such as acetylene black, furnace black, butthorn black, etc. is used.
なおまた、前記カーボンの含有量が、カーボン
を含有する合成樹脂層中において、5wt.％未満の
場合には、電線被覆用テープに対する一応の目安
である体積固有抵抗率が１×10゜〜104Ωcmの導電
値を有するテープの条件が満足されなく、また、
50wt.％を超えるような場合には、製膜原料であ
る樹脂混合物における製膜適性が悪化し、均質な
電線被覆テープが得られなくなるので、前記カー
ボンは、カーボンを含有する導電性樹脂層中にお
いて、５〜50wt.％の範囲内で含有されているこ
とが必要である。 Furthermore, if the content of carbon is less than 5wt.% in the carbon-containing synthetic resin layer, the specific volume resistivity, which is a tentative guideline for electric wire coating tape, is 1 x 10° to 10 The condition of the tape having a conductivity value of 4 Ωcm is not satisfied, and
If it exceeds 50 wt.%, the film forming suitability of the resin mixture, which is the raw material for film forming, will deteriorate and a homogeneous electric wire coating tape will not be obtained. It is necessary that the content be within the range of 5 to 50 wt.%.
前記本発明の電線被覆テープにおける合成樹脂
には、電子線の照射による架橋構造が導入されて
おり、該架橋構造の導入によつて優れた耐熱性が
具備されているものである。 The synthetic resin in the electric wire covering tape of the present invention has a crosslinked structure formed by irradiation with an electron beam, and the introduction of the crosslinked structure provides excellent heat resistance.
なお、前記電子線の照射による架橋構造の導入
は、架橋剤を添加、混合し、これを熱処理するこ
とによつて得られる架橋構造の場合に発生する部
分ゲル化の問題がなく、すなわち、合成樹脂中に
多量に存在するカーボンのために、熱処理による
架橋構造の導入の際に発生しやすい部分ゲル化の
発生の問題がなく、極めて良質な電線被覆用テー
プとなるものである。 Note that the introduction of a crosslinked structure by electron beam irradiation does not cause the problem of partial gelation that occurs in the case of a crosslinked structure obtained by adding and mixing a crosslinking agent and heat-treating the mixture. Due to the large amount of carbon present in the resin, there is no problem of partial gelation that tends to occur when a crosslinked structure is introduced by heat treatment, and the tape for covering electric wires is of extremely high quality.
また、前記ポリエチレンまたはエチレン共重合
体による樹脂層に導入されている架橋構造の架橋
度が、該樹脂層における樹脂の百分率で示される
ゲル分率で5wt.％未満の場合には、架橋構造の導
入度が不十分なために耐熱性が十分ではなくな
り、熱収縮性を付与するための加熱延伸操作が困
難になり易いという欠点を伴うし、また、前記ゲ
ル分率で90wt.％を超えるような場合には、樹脂
層が脆くなることによつて、また、前記と同様
に、加熱延伸操作が困難となるので、本発明の熱
収縮性合成樹脂フイルムにおけるポリエチレンま
たはエチレン共重合体による樹脂層には、該樹脂
層の百分率で示されるゲル分率で５〜90wt.％の
範囲内の架橋度の架橋構造が、電子線の照射処理
によつて導入されていることが必要である。 In addition, if the degree of crosslinking of the crosslinked structure introduced into the resin layer made of polyethylene or ethylene copolymer is less than 5wt.% in terms of gel fraction expressed as a percentage of the resin in the resin layer, Due to the insufficient degree of introduction, the heat resistance becomes insufficient, and the heat stretching operation for imparting heat shrinkability tends to be difficult. In such a case, the resin layer becomes brittle, and the heat-stretching operation becomes difficult as described above. For this purpose, it is necessary that a crosslinked structure having a degree of crosslinking in the range of 5 to 90 wt.% as a gel fraction expressed as a percentage of the resin layer be introduced by electron beam irradiation treatment.
前記構成からなる本各発明の電線被覆用テープ
は、それぞれのテープに対応する構成を具備する
熱収縮性合成樹脂フイルムを幅５〜15mm程度のテ
ープ状に裁断することによつて得られるものであ
る。 The electric wire covering tapes of the present invention having the above-mentioned configurations are obtained by cutting heat-shrinkable synthetic resin films having the configurations corresponding to the respective tapes into tape shapes with a width of about 5 to 15 mm. be.
本第１の発明の電線被覆用テープに裁断される
熱収縮性合成樹脂フイルム、すなわち、カーボン
を含有する単一層からなる熱収縮性合成樹脂フイ
ルムは、ポリエチレンまたはエチレン共重合体か
らなる熱可塑性合成樹脂95〜50wt.％と、カーボ
ン５〜50wt.％とからなる製膜用原料たる混合組
成物を押出成形に付し、合成樹脂原反フイルムを
作製し、しかる後に、得られた合成樹脂原反フイ
ルムに、延伸倍率約２倍以上の一軸延伸処理と電
子線照射処理とを行なうことによつて容易に得ら
れる。 The heat-shrinkable synthetic resin film to be cut into the electric wire covering tape of the first invention, that is, the heat-shrinkable synthetic resin film consisting of a single layer containing carbon, is a thermoplastic synthetic resin film made of polyethylene or ethylene copolymer. A mixed composition, which is a raw material for film production, consisting of 95 to 50 wt.% resin and 5 to 50 wt.% carbon is extruded to produce a synthetic resin raw film, and then the obtained synthetic resin raw film is This can be easily obtained by subjecting a deformed film to uniaxial stretching at a stretching ratio of about 2 times or more and electron beam irradiation.
また、本第２の発明の電線被覆用テープに裁断
される熱収縮性合成樹脂フイルム、すなわち、カ
ーボンを含有する樹脂層とカーボンを含有するこ
とのない樹脂層との積層構成の熱収縮性合成樹脂
フイルムは、ポリエチレンまたはエチレン共重合
体からなる熱可塑性合成樹脂95〜50wt.％とカー
ボン５〜50wt.％とからなる混合組成物と、ポリ
エチレンまたはエチレン共重合体からなる熱可塑
性合成樹脂とを共押出成形し、カーボンを含んで
いる合成樹脂層とカーボンを全く含んでいない合
成樹脂層との２層構成の合成樹脂原反フイルム、
あるいはカーボンを含んでいる合成樹脂層の表、
裏両面にカーボンを全く含んでいない合成樹脂層
が積層されている３層構成の合成樹脂原反フイル
ムを作製し、しかる後に、得られた前記多層構成
の合成樹脂原反フイルムに、延伸倍率約２倍以上
の一軸延伸処理と電子線照射処理とを行なうこと
によつて容易に得られるものである。 Further, the heat-shrinkable synthetic resin film cut into the electric wire covering tape of the second invention, that is, the heat-shrinkable synthetic resin film having a laminated structure of a carbon-containing resin layer and a carbon-free resin layer. The resin film is made of a mixed composition consisting of 95 to 50 wt.% of a thermoplastic synthetic resin made of polyethylene or ethylene copolymer and 5 to 50 wt.% of carbon, and a thermoplastic synthetic resin made of polyethylene or ethylene copolymer. A synthetic resin raw film formed by co-extrusion molding and having a two-layer structure of a synthetic resin layer containing carbon and a synthetic resin layer containing no carbon at all,
Or the surface of a synthetic resin layer containing carbon,
A synthetic resin raw film with a three-layer structure in which synthetic resin layers containing no carbon at all are laminated on both sides of the back side is prepared, and then the resulting multilayer synthetic resin film is stretched at a stretching ratio of about This can be easily obtained by performing a uniaxial stretching process of twice or more and an electron beam irradiation process.
なお、前記各熱収縮性合成樹脂フイルムの製造
においては、製造工程中の延伸処理と電子線照射
処理とは、その順序を問わないが、先に電子線照
射処理を施してまず架橋構造を導入することによ
り、合成樹脂原反フイルムに耐熱性を付与し、し
かる後に、機械的強度と熱収縮性とを導入するた
めの延伸処理を施す工程を採る場合には、延伸工
程に続いて電子線照射工程を採る場合の欠点、す
なわち、混入されているカーボンに起因して延伸
工程時にフイルム表面に穿孔が発生し易いという
欠点がなく、また、延伸工程時の延伸倍率を高く
しても、原反フイルムを破断させることなく円滑
に延伸処理を遂行し得るというメリツトを有す
る。 In the production of each of the heat-shrinkable synthetic resin films described above, the stretching treatment and electron beam irradiation treatment during the manufacturing process do not matter in any order, but the electron beam irradiation treatment is performed first to introduce a crosslinked structure. When applying a stretching process to impart heat resistance to the synthetic resin raw film and then introduce mechanical strength and heat shrinkability, the stretching process is followed by an electron beam treatment. It does not have the disadvantage of using the irradiation process, that is, perforations are likely to occur on the film surface during the stretching process due to the carbon mixed in, and even if the stretching ratio during the stretching process is high, the original This has the advantage that the stretching process can be carried out smoothly without breaking the anti-film.
［発明の作用］
本第１の発明の電線被覆用テープ、すなわち、
カーボンを含有する合成樹脂層の単一層からなる
電線被覆用テープの場合は、銅線等の電線を予め
別製の合成樹脂フイルムまたはテープ等の絶縁材
で直接被覆し、その外側に本第１の発明の電線被
覆用テープを捲回し、次いで、熱処理を施して熱
収縮させることにより、複数本の電線を電線同士
間に間隙を生ずることなしに緊縛状態で巻き付け
ることができるので、電線による電流の通過効率
を良くすることができるばかりでなく、外部から
侵入する電磁波と電線から発生する電磁波とを完
全に遮蔽する作用を果すものである。[Action of the invention] The electric wire covering tape of the first invention, that is,
In the case of a wire-covering tape consisting of a single layer of carbon-containing synthetic resin, the wire, such as a copper wire, is directly covered in advance with an insulating material such as a synthetic resin film or tape made separately, and this No. By winding the electric wire covering tape of the invention and then heat-shrinking it by heat treatment, it is possible to wrap multiple electric wires in a tight state without creating gaps between the electric wires, so that the electric current caused by the electric wires can be reduced. This not only improves the passing efficiency of the wires, but also completely blocks electromagnetic waves entering from the outside and electromagnetic waves generated from the wires.
また、本第２の発明の電線被覆用テープ、すな
わち、カーボンを含有する合成樹脂層とカーボン
を含有しない合成樹脂層との多層構成からなる電
線被覆用テープの場合は、カーボンを含有してい
ない合成樹脂層面が銅線等の電線と接するように
してテープを電線に捲回し、次いで熱処理によつ
て熱収縮させることにより、前記と同様の作用が
果されるものである。 Further, in the case of the electric wire covering tape of the second invention, that is, the electric wire covering tape having a multilayer structure of a carbon-containing synthetic resin layer and a carbon-free synthetic resin layer, it does not contain carbon. The same effect as described above can be achieved by winding the tape around an electric wire such as a copper wire so that the surface of the synthetic resin layer is in contact with the electric wire, and then shrinking the tape through heat treatment.
［実施例］
以下本発明の具体的な構成を実施例を以つて説
明する。[Example] Hereinafter, a specific configuration of the present invention will be explained with reference to an example.
実施例 １
低密度ポリエチレン［日本ユニカー製、
NUC8160］70wt.％、アセチレンブラツク（カー
ボン）30wt.％との混合組成物を成形用原料とし、
インフレーシヨン法にて厚さ100μに成膜して原
反フイルムを得た。Example 1 Low density polyethylene [manufactured by Nippon Unicar,
A mixed composition of NUC8160] 70wt.% and acetylene black (carbon) 30wt.% is used as a raw material for molding,
An original film was obtained by forming a film to a thickness of 100 μm using the inflation method.
得られた原反フイルムに、窒素気流中で、加速
電圧175KV、照射線量10Mradの電子線照射処理
を行い、前記原反フイルムに架橋構造を導入し
た。 The obtained raw film was subjected to electron beam irradiation treatment in a nitrogen stream at an acceleration voltage of 175 KV and an irradiation dose of 10 Mrad to introduce a crosslinked structure into the raw film.
なお、前記電子線の照射処理に付されたポリエ
チレンフイルムにおける架橋度は、ポリエチレン
樹脂の百分率で示されるゲル分率で60wt.％（80
℃トルエン、４時間抽出後）である。 The degree of crosslinking in the polyethylene film subjected to the electron beam irradiation treatment is 60 wt.% (gel fraction expressed as a percentage of polyethylene resin).
°C toluene, after extraction for 4 hours).
引き続いて、前記架橋構造が導入されたフイル
ムを、ロール式一軸延伸装置で、延伸温度80℃に
て、幅方向に対して直角方向に、延伸倍率2.5の
延伸処理を施すことによつてポリエチレン製フイ
ルムを得た。 Subsequently, the film into which the crosslinked structure was introduced was subjected to a stretching process using a roll-type uniaxial stretching device at a stretching temperature of 80°C and a stretching ratio of 2.5 in a direction perpendicular to the width direction. I got the film.
得られたフイルムは、該フイルムの軟化温度た
る110℃における熱収縮率が80％である。 The obtained film has a heat shrinkage rate of 80% at 110° C., which is the softening temperature of the film.
次いで、前記得られたポリエチレン製の熱収縮
性フイルムを、機械方向（すなわち延伸方向）
に、幅10mm宛に、カツターで切断し、本第１の発
明の一実施例品である電線被覆用テープを得た。 Next, the obtained polyethylene heat-shrinkable film is stretched in the machine direction (i.e., stretching direction).
Then, it was cut with a cutter to a width of 10 mm to obtain a tape for covering electric wires, which is an example of the first invention.
実施例 ２
低密度ポリエチレン70wt.％とカーボン30wt.％
とからなる導電性樹脂（東京インキ製パピオスタ
ツト5003）を、Ｔダイ法にて厚さ160μに成膜し、
原反フイルムを得た。この原反フイルムに、窒素
気流中で加速電圧200KV、照射線量10Mradで電
子線照射処理を行い、前記原反フイルムに架橋構
造を導入した。Example 2 Low density polyethylene 70wt.% and carbon 30wt.%
A conductive resin (Papiostat 5003 manufactured by Tokyo Ink) was formed into a film with a thickness of 160μ by the T-die method,
The original film was obtained. This raw film was subjected to electron beam irradiation treatment in a nitrogen stream at an acceleration voltage of 200 KV and an irradiation dose of 10 Mrad to introduce a crosslinked structure into the raw film.
なお、前記電子線の照射処理に付されたポリエ
チレンフイルムにおける架橋度は、ポリエチレン
樹脂の百分率で示されるゲル分率で55wt.％（80
℃トルエン、４時間抽出後）である。 The degree of crosslinking in the polyethylene film subjected to the electron beam irradiation treatment is 55 wt.% (gel fraction expressed as a percentage of polyethylene resin).
°C toluene, after extraction for 4 hours).
引き続いて、前記架橋構造が導入されたフイル
ムをロール式一軸延伸装置で延伸温度90℃にて幅
方向に対して直角方向に、延伸倍率３倍の延伸処
理を施すことによつてポリエチレン製フイルムを
得た。 Subsequently, the film into which the crosslinked structure was introduced was subjected to a stretching treatment using a roll-type uniaxial stretching device at a stretching temperature of 90° C. in a direction perpendicular to the width direction at a stretching ratio of 3 times, thereby forming a polyethylene film. Obtained.
得られたフイルムは、該フイルムの軟化温度で
ある110℃における熱収縮率が85％である。 The obtained film has a heat shrinkage rate of 85% at 110° C., which is the softening temperature of the film.
次いで、前記得られたポリエチレン製の熱収縮
性フイルムを、機械方向（すなわち延伸方向）
に、幅10mm宛に、カツターで切断し、本第１の発
明の一実施例品である電線被覆用テープを得た。 Next, the obtained polyethylene heat-shrinkable film is stretched in the machine direction (i.e., stretching direction).
Then, it was cut with a cutter to a width of 10 mm to obtain a tape for covering electric wires, which is an example of the first invention.
［発明の効果］
本第１の発明の電線被覆用テープは、ポリエチ
レンまたはエチレン共重合体からなる熱可塑性合
成樹脂95〜50wt.％とカーボン５〜50wt.％とによ
る熱可塑性合成樹脂テープで、しかも、前記熱可
塑性合成樹脂には、該樹脂の百分率で示されるゲ
ル分率で５〜90wt.％の架橋度の架橋構造が、電
子線の照射処理によつて導入されており、かつ、
前記熱可塑性合成樹脂テープの軟化温度での10〜
90％の熱収縮率が、延伸配向によつて導入されて
いるものである。[Effects of the Invention] The electric wire covering tape of the first invention is a thermoplastic synthetic resin tape made of 95 to 50 wt.% of a thermoplastic synthetic resin made of polyethylene or ethylene copolymer and 5 to 50 wt.% of carbon. Moreover, a crosslinked structure having a crosslinking degree of 5 to 90 wt.% in gel fraction expressed as a percentage of the resin is introduced into the thermoplastic synthetic resin by electron beam irradiation treatment, and
10~ at the softening temperature of the thermoplastic synthetic resin tape
A heat shrinkage rate of 90% is introduced by stretch orientation.
また、本第２の発明の電線被覆用テープは、ポ
リエチレンまたはエチレン共重合体からなる熱可
塑性合成樹脂95〜50wt.％とカーボン５〜50wt.％
とによる導電性合成樹脂層と、前記導電性合成樹
脂層におけるポリエチレンまたはエチレン共重合
体からなる熱可塑性合成樹脂と同一の合成樹脂の
みによつて形成されている絶縁性合成樹脂層との
熱可塑性合成樹脂積層テープで、前記導電性合成
樹脂層と絶縁性合成樹脂層とにおける合成樹脂に
は、該樹脂の百分率で示されるゲル分率で５〜
90wt.％の架橋度の架橋構造が、電子線の照射処
理によつて導入されており、かつ、前記熱可塑性
合成樹脂テープの軟化温度での10〜90％の熱収縮
率が、延伸配向によつて導入されているものであ
る。 Further, the electric wire covering tape of the second invention comprises 95 to 50 wt.% of a thermoplastic synthetic resin made of polyethylene or ethylene copolymer and 5 to 50 wt.% of carbon.
and an insulating synthetic resin layer formed of only the same synthetic resin as the thermoplastic synthetic resin made of polyethylene or ethylene copolymer in the conductive synthetic resin layer. In the synthetic resin laminated tape, the synthetic resin in the conductive synthetic resin layer and the insulating synthetic resin layer has a gel fraction of 5 to 5 expressed as a percentage of the resin.
A crosslinked structure with a degree of crosslinking of 90wt.% is introduced by electron beam irradiation treatment, and the thermoplastic synthetic resin tape has a heat shrinkage rate of 10 to 90% at the softening temperature due to the stretching orientation. Therefore, it has been introduced.
しかして、前記本各発明の電線被覆用テープ
は、該テープにおける合成樹脂に導入されている
架橋構造に基いて、耐熱性において優れた作用を
奏するものであり、また、合成樹脂中に混入され
ているカーボンの存在によつて、電磁波遮蔽性能
を果たし、さらに、各種の物体を緊縛状態に包被
し得る熱収縮特性と機械的強度とが、延伸配向に
よつて具備されているものである。 Therefore, the electric wire covering tape of each of the present inventions exhibits excellent heat resistance based on the crosslinked structure introduced into the synthetic resin in the tape, and also has excellent heat resistance. Due to the presence of carbon in the material, it achieves electromagnetic wave shielding performance, and furthermore, due to its stretching orientation, it has heat-shrinkable properties and mechanical strength capable of enveloping various objects in a tight state. .
したがつて、本第１の発明の電線被覆用テープ
は、銅線等の電線を予め別製の合成樹脂フイルム
あるいはテープ等の絶縁材で直接被覆し、その外
周に、前記本発明のテープを捲回させ、次いで、
熱処理することによつて、前記テープを、複数本
の電線を電線同士の間に間〓を生成することなく
巻き付けることができるので、電線による電流の
通過効率を高め得ることは勿論のこと、外部から
侵入する電磁波と、電線から発生する電磁波とを
完全に遮断するという効果を奏するものである。 Therefore, in the electric wire covering tape of the first invention, an electric wire such as a copper wire is directly covered in advance with an insulating material such as a separate synthetic resin film or tape, and the tape of the invention is applied to the outer periphery of the electric wire. Wind it up, then
By heat-treating, the tape can be wrapped around multiple wires without creating gaps between the wires, which not only increases the efficiency of current passing through the wires, but also improves the efficiency of passing electric current through the wires. This has the effect of completely blocking electromagnetic waves entering from the wire and electromagnetic waves generated from the wire.
また、本第１の発明の電線被覆用テープは、該
テープにおける非導電層が銅線等の電線と接する
ようにして電線に捲回させ、次いで、熱処理する
ことによつて、前記本第１の発明の電線被覆用テ
ープの場合と同様の効果が奏されるものである。 Further, the tape for covering electric wires of the first invention can be obtained by winding the tape around an electric wire such as a copper wire so that the non-conductive layer is in contact with the electric wire, and then heat-treating the tape. The same effects as in the case of the electric wire covering tape of the invention can be obtained.
なお、本各発明の電線被覆用テープは、該テー
プにおける熱可塑性合成樹脂に、前記した通り、
ポリエチレンまたはエチレン共重合体が使用され
ているため、テープの捲回操作が容易であり、し
かも、前記樹脂には、該樹脂の百分率で示される
ゲル分率で５〜90wt.％の架橋度の架橋構造が導
入されているものであるから、前記テープの耐熱
性が良好で、しかも、熱収縮温度の許容範囲が大
きいため、前記電線被覆用テープを緊縛状態にフ
イツトさせる際の熱収縮温度として、強い結束力
を得ることが可能な高温度領域の温度を選択し、
利用することができる等の効果を奏するものであ
る。 In addition, as described above, in the electric wire covering tape of each of the present inventions, the thermoplastic synthetic resin in the tape is
Since polyethylene or ethylene copolymer is used, the tape winding operation is easy, and the resin has a degree of crosslinking of 5 to 90 wt.% in terms of gel fraction expressed as a percentage of the resin. Since the tape has a cross-linked structure, the heat resistance of the tape is good, and the allowable range of heat shrinkage temperature is wide, so that the heat shrinkage temperature when fitting the wire covering tape to the binding state is low. , select a temperature in the high temperature range where strong cohesion can be obtained,
It can be used effectively.
さらに、前記本各発明の電線被覆用テープは、
該テープにおける合成樹脂に耐熱特性をもたらす
ための架橋構造の導入が、電子線の照射処理によ
つて導入されているものであるから、例えば、架
橋剤の添加によつて架橋構造が導入されているも
のと比較した場合に、後者のものが、残留パーオ
キサイド等の残留物の影響によつて、導電性層に
対して強固な積層樹脂層を形成し得ないのに対し
て、導電性層と積層樹脂層との間の積層強度にお
いて優れた作用が奏され、しかも、生産効率にお
いても優れた作用が奏されるものである。 Furthermore, the electric wire covering tape of each of the present inventions is as follows:
Since the introduction of a crosslinked structure to provide heat resistance properties to the synthetic resin in the tape is performed by electron beam irradiation treatment, for example, the crosslinked structure is introduced by adding a crosslinking agent. When compared with the latter, it is not possible to form a strong laminated resin layer on the conductive layer due to the influence of residual peroxide, etc. An excellent effect is achieved in terms of the laminated strength between the resin layer and the laminated resin layer, and an excellent effect is also achieved in terms of production efficiency.
さらにまた、前記本発明の電線被覆用テープ
は、樹脂に導入されている架橋構造によつて、高
度の耐熱性を有しているものであるから、銅線等
の電線を前記テープで被覆し、しかる後に、その
外周面をポリ塩化ビニルテープ等で被覆するよう
な場合には、熱溶着によつてポリ塩化ビニルテー
プと前記電線被覆用テープとを接着することがで
きるので、作業性においても優れた作用を奏する
ものである。 Furthermore, the tape for covering electric wires of the present invention has a high degree of heat resistance due to the crosslinked structure introduced into the resin, so that electric wires such as copper wires can be covered with the tape. If the outer peripheral surface is then covered with a polyvinyl chloride tape or the like, the polyvinyl chloride tape and the electric wire covering tape can be bonded together by heat welding, which improves workability. It has an excellent effect.
またさらに、前記本第２の発明の電線被覆用テ
ープは、導電性層における合成樹脂と同一の合成
樹脂によつて絶縁性層が形成されているので、導
電性層と絶縁性層との間が、強固、一体に積層さ
れている電線被覆用テープとなるものである。 Furthermore, in the electric wire covering tape of the second invention, since the insulating layer is formed of the same synthetic resin as the synthetic resin in the conductive layer, there is a gap between the conductive layer and the insulating layer. However, this is a strong, integrally laminated electrical wire covering tape.
Claims (1)
る熱可塑性合成樹脂95〜50wt.％とカーボン５〜
50wt.％とによる熱可塑性合成樹脂テープで、し
かも、前記熱可塑性合成樹脂には、該樹脂の百分
率で示されるゲル分率で５〜90wt.％の架橋度の
架橋構造が、電子線の照射処理によつて導入され
ており、かつ、前記熱可塑性合成樹脂テープの軟
化温度での10〜90％の熱収縮率が、延伸配向によ
つて導入されていることを特徴とする電線被覆用
テープ。 ２ ポリエチレンまたはエチレン共重合体からな
る熱可塑性合成樹脂95〜50wt.％とカーボン５〜
50wt.％とによる導電性合成樹脂層と、前記導電
性合成樹脂層におけるポリエチレンまたはエチレ
ン共重合体からなる熱可塑性合成樹脂と同一の合
成樹脂のみによつて形成されている絶縁性合成樹
脂層との熱可塑性合成樹脂積層テープで、前記導
電性合成樹脂層と絶縁性合成樹脂層とにおける合
成樹脂には、該樹脂の百分率で示されるゲル分率
で５〜90wt.％の架橋度の架橋構造が、電子線の
照射処理によつて導入されており、かつ、前記熱
可塑性合成樹脂テープの軟化温度での10〜90％の
熱収縮率が、延伸配向によつて導入されているこ
とを特徴とする電線被覆用テープ。[Scope of Claims] 1. 95 to 50 wt.% thermoplastic synthetic resin made of polyethylene or ethylene copolymer and 5 to 50 wt.% of carbon.
50 wt.%, and the thermoplastic synthetic resin has a crosslinked structure with a degree of crosslinking of 5 to 90 wt.% in terms of gel fraction expressed as a percentage of the resin, which is irradiated with an electron beam. A tape for covering electric wires, characterized in that the tape has been introduced through processing, and a heat shrinkage rate of 10 to 90% at the softening temperature of the thermoplastic synthetic resin tape is introduced through stretching orientation. . 2 95-50wt.% thermoplastic synthetic resin made of polyethylene or ethylene copolymer and 5-5% carbon
50wt.%, and an insulating synthetic resin layer made of only the same synthetic resin as the thermoplastic synthetic resin made of polyethylene or ethylene copolymer in the conductive synthetic resin layer. In the thermoplastic synthetic resin laminated tape, the synthetic resin in the conductive synthetic resin layer and the insulating synthetic resin layer has a crosslinked structure with a degree of crosslinking of 5 to 90 wt.% in gel fraction expressed as a percentage of the resin. is introduced by electron beam irradiation treatment, and a heat shrinkage rate of 10 to 90% at the softening temperature of the thermoplastic synthetic resin tape is introduced by stretching orientation. Tape for covering electric wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179265A JPS5881129A (en) | 1981-11-09 | 1981-11-09 | Electroconductive and heat-shrinkable synthetic resin film, manufacture thereof and tape made of said film for covering electric wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179265A JPS5881129A (en) | 1981-11-09 | 1981-11-09 | Electroconductive and heat-shrinkable synthetic resin film, manufacture thereof and tape made of said film for covering electric wire |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26690788A Division JPH01280400A (en) | 1988-10-22 | 1988-10-22 | Thermal contractive synthetic resin film with conductive characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5881129A JPS5881129A (en) | 1983-05-16 |
| JPH0149612B2 true JPH0149612B2 (en) | 1989-10-25 |
Family
ID=16062820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56179265A Granted JPS5881129A (en) | 1981-11-09 | 1981-11-09 | Electroconductive and heat-shrinkable synthetic resin film, manufacture thereof and tape made of said film for covering electric wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5881129A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4921648A (en) * | 1983-04-02 | 1990-05-01 | Raychem Corporation | Method of joining an article comprising a conductive polymer composition to a polymeric substrate |
| US5030487A (en) * | 1984-04-04 | 1991-07-09 | Raychem Corporation | Heat recoverable article comprising conductive polymer compositions |
| DE3586726T2 (en) * | 1984-04-04 | 1993-05-06 | Raychem Corp | METHOD FOR CONNECTING SUBSTRATES. |
| US4853165A (en) * | 1984-04-04 | 1989-08-01 | Raychem Corporation | Method of using heat-recoverable articles comprising conductive polymer compositions |
| JPS62253431A (en) * | 1986-04-28 | 1987-11-05 | Ube Ind Ltd | Uniaxially stretched crosslinked polyethylene film |
| DE3889177T2 (en) * | 1987-09-09 | 1994-11-24 | Raychem Ltd | Conductive plastic composition. |
| DE4445767A1 (en) * | 1994-12-21 | 1996-06-27 | Huber+Suhner Ag | Shrinkable article |
| JP4846103B2 (en) * | 2001-02-07 | 2011-12-28 | 三菱レイヨン株式会社 | Fiber reinforced resin pipe and power transmission shaft using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5176367A (en) * | 1974-09-27 | 1976-07-01 | Raychem Corp | |
| JPS5655232A (en) * | 1979-10-11 | 1981-05-15 | Unitika Ltd | Manufacture of metal-coated, stretched film |
-
1981
- 1981-11-09 JP JP56179265A patent/JPS5881129A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5176367A (en) * | 1974-09-27 | 1976-07-01 | Raychem Corp | |
| JPS5655232A (en) * | 1979-10-11 | 1981-05-15 | Unitika Ltd | Manufacture of metal-coated, stretched film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5881129A (en) | 1983-05-16 |
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