JP4667793B2 - Electric wire / cable - Google Patents
Electric wire / cable Download PDFInfo
- Publication number
- JP4667793B2 JP4667793B2 JP2004248511A JP2004248511A JP4667793B2 JP 4667793 B2 JP4667793 B2 JP 4667793B2 JP 2004248511 A JP2004248511 A JP 2004248511A JP 2004248511 A JP2004248511 A JP 2004248511A JP 4667793 B2 JP4667793 B2 JP 4667793B2
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- polyolefin
- density polyethylene
- ethylene
- insulated wire
- crosslinked
- Prior art date
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- 239000000463 material Substances 0.000 claims description 43
- 239000002699 waste material Substances 0.000 claims description 27
- 229920005672 polyolefin resin Polymers 0.000 claims description 25
- 229920000098 polyolefin Polymers 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- -1 polypropylene Polymers 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 12
- 238000004132 cross linking Methods 0.000 claims description 10
- 239000011342 resin composition Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 7
- 239000004700 high-density polyethylene Substances 0.000 claims description 7
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 7
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001684 low density polyethylene Polymers 0.000 claims description 6
- 239000004702 low-density polyethylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 5
- 229920003067 (meth)acrylic acid ester copolymer Polymers 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 16
- 239000004703 cross-linked polyethylene Substances 0.000 description 16
- 239000004698 Polyethylene Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000012212 insulator Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910000077 silane Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 235000019197 fats Nutrition 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 240000007182 Ochroma pyramidale Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- LXCFILQKKLGQFO-UHFFFAOYSA-N methylparaben Chemical compound COC(=O)C1=CC=C(O)C=C1 LXCFILQKKLGQFO-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Description
本発明は、絶縁電線またはケーブルに関するものであり、更に詳しくはゲル分率４０％以下の再生材を利用して得られる絶縁電線またはケーブルに関するものである。 The present invention relates to an insulated wire or cable, and more particularly to an insulated wire or cable obtained using a recycled material having a gel fraction of 40% or less.
絶縁電線またはケーブルの被覆材はポリ塩化ビニルやポリエチレン、架橋ポリエチレンが使用されている。使用後、回収された絶縁電線またはケーブルは導体と被覆材に分離され、被覆廃材はリサイクルもしくは産業廃棄物として埋立処理される。被覆廃材の中でもポリ塩化ビニルやポリエチレンは熱可塑性樹脂であり、再成形加工が容易であることから、再び電線被覆材として利用することが可能であり、一部実用化されている。一方、架橋ポリエチレンは架橋による三次元構造を有していることから加熱溶融しないという特徴があり、しかし、そのために再加工・再利用が困難となりサーマルリサイクルもしくは埋立処理されている。サーマルリサイクルは、プラスチック製品としてはワンウェイであり、資源の有効活用等の観点からは好ましくない。また埋立て処理は、処理場の不足などの問題が生じる。したがって、環境負荷低減のため、例えば電線に使用された架橋ポリエチレン被覆廃材を、ポリ塩化ビニル被覆材やポリエチレン被覆材と同様に電線に戻すといったクローズドリサイクルが望まれている。 Polyvinyl chloride, polyethylene, or cross-linked polyethylene is used as a covering material for insulated wires or cables. After use, the recovered insulated wire or cable is separated into a conductor and a covering material, and the covering waste material is recycled or landfilled as industrial waste. Among the waste coating materials, polyvinyl chloride and polyethylene are thermoplastic resins and can be easily re-molded. Therefore, they can be used again as a wire coating material, and are partially put into practical use. On the other hand, since crosslinked polyethylene has a three-dimensional structure due to crosslinking, it has a feature that it is not melted by heating. However, it is difficult to rework and reuse, and it is thermally recycled or landfilled. Thermal recycling is a one-way as a plastic product, and is not preferable from the viewpoint of effective use of resources. Moreover, the landfill process causes problems such as a shortage of processing sites. Therefore, in order to reduce the environmental load, for example, closed recycling in which the cross-linked polyethylene coating waste material used for the electric wire is returned to the electric wire in the same manner as the polyvinyl chloride coating material or the polyethylene coating material is desired.
架橋ポリエチレンのリサイクル技術としては、一つに架橋ポリエチレンを微粉砕後、樹脂の充填材もしくは樹脂として使用する方法があるが、絶縁電線またはケーブルの被覆材に戻した場合、被覆材特性や電線の電気特性に問題を生じる可能性がある。その他、特許文献１のように架橋ポリエチレンをポリエチレンに戻す技術が開発されつつあるが、再利用して再び絶縁電線に使用した例はなかった。
本発明は、架橋ポリオレフィン廃材を絶縁電線の被覆材として再利用可能とし、さらに前記廃材の再生材を使用しても、電気特性および強度・伸びに優れた被覆材を有する絶縁電線と該絶縁電線を有してなるケーブルを提供することを目的とする。 The present invention is a crosslinked polyolefin waste and can be reused as a covering material of the insulating electric wire, be further recycled materials of the waste material, the insulated wire and the insulation having a coating material with excellent electrical properties and strength and elongation It aims at providing the cable which has an electric wire .
この課題は下記手段によって達成された。
（１）導体上に被覆層を有する絶縁電線の製造方法であって、高密度ポリエチレン、直鎖状低密度ポリエチレン、低密度ポリエチレン及びポリプロピレンから選ばれるポリオレフィン樹脂並びに、エチレン−酢酸ビニル共重合体、エチレン−（メタ）アクリル酸エステル共重合体及びエチレン−（メタ）アクリル酸共重合体から選ばれるポリオレフィン系樹脂から選ばれた樹脂の架橋されたものの廃材である架橋ポリオレフィン廃材を処理温度２５０℃〜４００℃、剪断速度２００ｓｅｃ −１ 以上で再生処理してゲル分率４０％以下のゲル分を含む架橋ポリオレフィン再生材とし、該架橋ポリオレフィン再生材を高密度ポリエチレン、直鎖状低密度ポリエチレン、低密度ポリエチレン及びポリプロピレンから選ばれたポリオレフィン樹脂並びにエチレン−酢酸ビニル共重合体、エチレン−（メタ）アクリル酸エステル共重合体及びエチレン−（メタ）アクリル酸共重合体から選ばれたポリオレフィン系樹脂から選ばれた樹脂と、全樹脂量に対し５０質量％以下で混合してポリオレフィン系樹脂組成物を得て、該ポリオレフィン系樹脂組成物で被覆して前記被覆層の少なくとも１層の絶縁被覆層を形成することを特徴とする絶縁電線の製造方法。
（２）前記絶縁被覆層に含まれる樹脂を架橋処理することを特徴とする（１）に記載の絶縁電線の製造方法。
（３）（１）または（２）に記載の方法で製造された絶縁電線または該絶縁電線を有してなるケーブル。
This object has been achieved by the following means.
(1) A method for producing an insulated wire having a coating layer on a conductor, a polyolefin resin selected from high density polyethylene, linear low density polyethylene, low density polyethylene and polypropylene, and an ethylene-vinyl acetate copolymer, A crosslinked polyolefin waste material, which is a waste material of a cross-linked resin selected from polyolefin resins selected from ethylene- (meth) acrylic acid ester copolymers and ethylene- (meth) acrylic acid copolymers, is treated at a temperature of 250 ° C. A crosslinked polyolefin recycled material containing a gel fraction with a gel fraction of 40% or less that is regenerated at 400 ° C. and a shear rate of 200 sec −1 or more . The crosslinked polyolefin recycled material is a high density polyethylene, a linear low density polyethylene, a low density Polyolefin resin selected from polyethylene and polypropylene And a resin selected from polyolefin resins selected from ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid ester copolymer and ethylene- (meth) acrylic acid copolymer, and the total resin amount Mixing at 50% by mass or less to obtain a polyolefin resin composition, and coating with the polyolefin resin composition to form at least one insulating coating layer of the coating layer. Method.
( 2 ) The method for producing an insulated wire according to (1 ), wherein a resin contained in the insulating coating layer is crosslinked.
( 3 ) An insulated wire manufactured by the method according to (1) or (2) or a cable having the insulated wire.
本発明により、ゲル分率が４０％以下の架橋ポリエチレン再生材を、ポリオレフィンもしくはポリオレフィン系樹脂と全樹脂量に対し５０質量％以下で混合することにより、架橋ポリオレフィン廃材を絶縁電線の絶縁被覆材として再利用しても、優れた電気特性および機械的特性を有する絶縁電線を得ることを可能とする。
さらに本発明は、電線の被覆材から電線へのクローズドリサイクルを可能とする。
The present invention, the gel fraction of 40% or less of the cross-linked polyethylene recycled materials, by mixing 50% by mass or less with respect to Po Li olefin or polyolefin resin and the total resin amount, the crosslinked polyolefin scrap insulated electric wire insulation It is reused as a coating material makes it possible to obtain an insulating electric wire having an excellent electrical and mechanical properties.
The present invention allows for closed recycling to electric wire from the coating material of the electric wire.
本発明の絶縁電線は、被覆層として架橋ポリオレフィン廃材を適切な条件のもと熱可塑化処理により再生処理し、ゲル分率４０％以下にした架橋ポリオレフィン再生材を、ポリオレフィンもしくはポリオレフィン系樹脂と、全樹脂量に対し５０質量％以下で混合したものを使用することにより、絶縁電線として好適に使用可能である。 Insulated electric wire of the present invention, the crosslinked polyolefin waste regenerated treated with the original thermoplastic processing appropriate conditions, the crosslinked polyolefin recycled material and 40% or less gel fraction, Po Li olefin or polyolefin as coating layer using the tree fat, a mixture of 50 wt% or less against the total resin amount, it is suitably used as an insulating electric wire.
架橋ポリオレフィン廃材とは、例えば、電線被覆廃材、光ケーブル被覆廃材などの配線材の被覆廃材や、一般廃棄物として廃棄される給水用、給湯用、屋内暖房用のパイプ、または各種発泡体などが挙げられる。
本発明の絶縁電線に用いられる架橋ポリオレフィン廃材はどのような架橋方法によるものでもよく、例えば、有機過酸化物やシラン化合物、電子線などによって架橋されたものを使用することができる。また回収された廃材の使用年数は関係なく、極端に劣化が進んだものでも支障はない。
本発明に使用される架橋ポリオレフィン廃材は、高密度ポリエチレン、直鎖状低密度ポリエチレン、低密度ポリエチレン及びポリプロピレンから選ばれるポリオレフィン樹脂並びにエチレン−酢酸ビニル共重合体、エチレン−（メタ）アクリル酸エステル共重合体及びエチレン−（メタ）アクリル酸共重合体から選ばれるポリオレフィン系樹脂から選ばれた樹脂の架橋されたものの廃材である。これらは１種もしくは２種以上の混合物であっても良い。
Cross-linked polyolefin waste materials include, for example, coating waste materials for wiring materials such as wire coating waste materials and optical cable coating waste materials, pipes for water supply, hot water supply, indoor heating, etc., discarded as general waste, or various foams. It is done.
Crosslinked polyolefin waste used for the insulating electric wire of the present invention may be by any crosslinking methods, for example, it can be used on a crosslinked organic peroxide or a silane compound, and electron beam. In addition, regardless of how long the recovered waste is used, there is no problem even if it is extremely deteriorated.
Crosslinked polyolefin waste used in the present invention, high density polyethylene, linear low density polyethylene, low density polyethylene and polypropylene polyolefin resins and d is selected from the emissions styrene - vinyl acetate copolymer, ethylene - (meth) acrylic acid It is a waste material of a crosslinked resin selected from polyolefin resins selected from ester copolymers and ethylene- (meth) acrylic acid copolymers . These may be one kind or a mixture of two or more kinds.
本発明の絶縁電線には、上記の架橋ポリオレフィン廃材を再生処理した再生材が好ましく使用できる。
再生材のゲル分率は４０％以下が好ましい。ゲル分率が４０％以上であると電線被覆材としての特性を満足することが出来ない。
The insulated electric wire of the present invention, reproduction material in which playback processing of the above crosslinked polyolefin waste can be preferably used.
The gel fraction of the recycled material is preferably 40% or less. When the gel fraction is 40% or more, the properties as a wire coating material cannot be satisfied.
本発明の絶縁電線に用いられる再生材の再生処理は、ゲル分率が４０％以下になるものであれば特に制限はないが、例えば、同方向噛み合い型二軸押出機で剪断速度２００ｓｅｃ−１以上、温度２５０℃〜４００℃で処理する方法などが利用できる。なお、本発明における剪断速度とは、押出機のスクリューエレメント最外周部の周速度（ｍｍ／ｓ）をスクリューとバレルとのクリアランス（ｍｍ）で除した数値をいう。 Reproduction processing of the reproduction material used for the insulating electric wire of the present invention is not particularly limited as long as the gel fraction is below 40%, for example, shear rate 200sec in the same direction intermeshing type twin-screw extruder - One or more, the method of processing at the temperature of 250 to 400 degreeC etc. can be utilized. In addition, the shear rate in this invention means the numerical value which remove | divided the peripheral speed (mm / s) of the screw element outermost part of an extruder by the clearance (mm) of a screw and a barrel.
前記押出機で処理する際の再生処理条件は、上記の再生材のゲル分率が４０％以下となるように適宜調整できるが、好ましい処理温度は２５０℃〜４００℃、好ましい剪断速度は２００ｓｅｃ−１以上である。 The regeneration processing conditions for processing with the extruder can be adjusted as appropriate so that the gel fraction of the recycled material is 40% or less, but the preferable processing temperature is 250 ° C. to 400 ° C., and the preferable shear rate is 200 sec −. 1 or more.
前記再生材はポリオレフィンもしくはポリオレフィン系樹脂と混合して組成物（本発明において、これを「ポリオレフィン系樹脂組成物」という。）とすることができる。好ましい再生材の混合量は全樹脂量に対し５０質量％以下であり、４０質量％以下がより好ましく、３０質量％以下が特に好ましい。５０質量％より多い場合、電線に要求される特性を満足することが出来ない。
本発明において、再生材とともに混合するポリオレフィンもしくはポリオレフィン系樹脂とは、通常絶縁電線に使用している、高密度ポリエチレン、直鎖状低密度ポリエチレン、低密度ポリエチレン及びポリプロピレンから選ばれるポリオレフィン樹脂並びにエチレン−酢酸ビニル共重合体、エチレン−（メタ）アクリル酸エステル共重合体及びエチレン−（メタ）アクリル酸共重合体から選ばれるポリオレフィン系樹脂をいう。中でも高密度ポリエチレン、直鎖状低密度ポリエチレンもしくは低密度ポリエチレンの使用が好ましい。これらは１種もしくは２種以上を混合して用いてもよい。
The recycled material can be mixed with polyolefin or polyolefin resin to form a composition (in the present invention, this is referred to as “polyolefin resin composition”) . Mixing amount of preferably recycled material is 50 wt% or less relative to the total tree fat weight, more preferably 40 wt% or less, particularly preferably 30 mass% or less. If more than 50 wt%, it is impossible to satisfy the characteristics required for the conductive line.
In the present invention, a polyolefin or polyolefin resin is mixed with recycled materials, that are used in normal insulated electric wire, high-density polyethylene, linear low density polyethylene, polyolefin resin selected from low density polyethylene and polypropylene emissions and d styrene - vinyl acetate copolymer, ethylene - (meth) acrylate copolymer and ethylene - (meth) refers to a polyolefin resin selected from acrylic acid copolymer. Among them, the use of high density polyethylene, linear low density polyethylene or low density polyethylene is preferable. You may use these 1 type or in mixture of 2 or more types.
本発明の絶縁電線の製造には、一般的に使用されている押出機を使用することが出来る。また本発明における絶縁電線は、通常樹脂に添加される酸化防止剤、紫外線吸収剤などの添加剤を必要に応じて適量添加することも出来る。 In the manufacture of insulated electric wire of the present invention can be used an extruder commonly used. The insulated electric wire of the present invention, antioxidants are added to the normal resin, it may be added in an appropriate amount as needed additives such as ultraviolet absorbers.
さらに本発明の絶縁電線は被覆層に含まれる樹脂が架橋されていてもよい。架橋方法としては通常の架橋方法を適宜選択すればよく、特に限定しないが、例えば、有機過酸化物を添加した組成物を電線に被覆したのち加熱処理する「過酸化物架橋方法」、シラン化合物と架橋助剤を添加した組成物を電線に被覆したのち水分により架橋させる「シラン架橋方法」、電子線照射による「電子線架橋方法」などが挙げられる。 An insulating electric wire of the present invention is a resin contained in the coating layer may be crosslinked. A normal crosslinking method may be appropriately selected as a crosslinking method, and is not particularly limited. For example, a “peroxide crosslinking method” in which a wire is coated with a composition to which an organic peroxide has been added, and then a silane compound. And “a silane crosslinking method” in which a wire is coated with a composition containing a crosslinking aid and then crosslinked with moisture, and an “electron beam crosslinking method” by electron beam irradiation.
本発明においては導体上に被覆する被覆層は１層でも複数の層であってもよい。
本発明の絶縁電線は、再生材を含むポリオレフィン系樹脂組成物で構成された絶縁被覆層が、被覆層のうち少なくとも１層であればよく、複数層、または全層であってもよい。上記再生材を含むポリオレフィン系樹脂組成物で構成された層以外の層は、通常電線の被覆材として使用される樹脂であれば特に制限なく使用可能であるが、例えば、ポリエチレン、ポリプロピレン、塩化ビニル等が挙げられる。
上記の好ましい実施形態は光ケーブルなどのケーブルの被覆材料の場合でも同様である。
In the present invention, the coating layer covering the conductor may be one layer or a plurality of layers.
Insulated electric wire of the present invention, the insulating cover layer made of a polyolefin resin composition containing a recycled material is may be at least one layer of the coating layer may have a multilayer, or all layers. The recycled material layer other than the layer made of a polyolefin resin composition containing is particularly usable without any limitation as long as it is a resin used as a coating material for ordinary conductive wire, for example, polyethylene, polypropylene, chloride Vinyl etc. are mentioned.
The above-described preferred embodiment is the same in the case of a coating material for a cable such as an optical cable.
以下に本発明を実施例に基づきさらに詳細に説明するが、本発明はこれらに限定されるものではない。 Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.
下記の架橋ポリオレフィン廃材、その再生材及びポリオレフィン樹脂を使用した。
〔架橋ポリオレフィン廃材〕
（１）有機過酸化物により架橋された屋外用架橋ポリエチレン電線被覆廃材を１０ｍｍ以下のサイズに粉砕したもの
（２）シラン化合物により架橋された屋外用架橋ポリエチレン電線被覆廃材を１０ｍｍ以下のサイズに粉砕したもの
〔再生材〕
上記の架橋ポリエチレン廃材（１）、架橋ポリエチレン廃材（２）を同方向噛み合い型二軸押出機を用い、処理温度は３００℃、剪断速度は２２００〜２３００ｓｅｃ−１として再生処理を行った。得られた再生材をそれぞれ再生材（１）、再生材（２）とした。
〔微粉化ＸＬＰＥ〕
ビーズミルを用いて、容器内に上記（１）の架橋ポリエチレン廃材と水を充填し、容器外部を冷却した状態にて粉砕処理を行ったのち、乾燥させ、微粉化ＸＬＰＥを得た。得られた粉末の平均粒径は３５０μｍである。
〔ポリオレフィン樹脂〕
ポリエチレン樹脂、ＮＵＣＧ９３０１（日本ユニカー（株）製）
The following cross-linked polyolefin waste material, its recycled material and polyolefin resin were used .
[Crosslinked polyolefin waste]
(1) Crushed outdoor polyethylene wire covering waste material crosslinked with organic peroxide to a size of 10 mm or less (2) Crushed outdoor crosslinked polyethylene wire coating waste material crosslinked with a silane compound to a size of 10 mm or less (Recycled material)
The above-mentioned cross-linked polyethylene waste material (1) and cross-linked polyethylene waste material (2) were subjected to a regeneration treatment at a treatment temperature of 300 ° C. and a shear rate of 2200 to 2300 sec-1 using a same-direction meshing twin screw extruder. The obtained recycled materials were designated as recycled material (1) and recycled material (2), respectively.
[Micronized XLPE]
The bead mill was used to fill the container with the above-mentioned (1) cross-linked polyethylene waste material and water, followed by pulverization with the outside of the container cooled, and then dried to obtain micronized XLPE. The average particle size of the obtained powder is 350 μm.
[Polyolefin resin]
Polyethylene resin, NUCG9301 (Nippon Unicar Co., Ltd.)
（絶縁電線の製造）
投入する、再生材（１）、再生材（２）、微粉化ＸＬＰＥ、およびＮＵＣＧ９３０１の混合比は、それぞれ実施例１〜３および比較例１〜５において、表１のとおりとした。
さらに、表１のとおり、実施例１、２、および比較例１〜３についてはシラン液（Ａ−１７１（日本ユニカー製））および触媒マスターバッチ（モルデックスＣＭ８４６（アプコ（株）製））を添加することとした。
上記の樹脂、シラン液および触媒マスターバッチをホッパーから投入し、直径１２０ｍｍ単軸押出機を用いて、ミキシングゾーンを１８０℃以下、グラフト反応ゾーンを２２０℃以下、スクリュー回転数を５０ｒｐｍで設定し、断面積２４０ｍｍ２のアルミ導体に厚さ３ｍｍの肉厚で押出して、樹脂組成物で被覆された絶縁電線を製造した。製造された絶縁電線を、８０℃、２４時間温水バスに浸漬し架橋処理を行った。
また、実施例３、比較例４、５においては、直径１２０ｍｍ単軸押出機を用いて、成形温度１７０〜１９０℃、スクリュー回転数を９０ｒｐｍで設定し、断面積２４０ｍｍ２のアルミ導体に厚さ３ｍｍの肉厚で押出して、樹脂組成物で被覆された絶縁電線を製造した。
(Manufacture of insulated wires)
The mixing ratios of recycled material (1), recycled material (2), micronized XLPE, and NUCG9301 to be added are shown in Table 1 in Examples 1 to 3 and Comparative Examples 1 to 5, respectively.
Furthermore, as shown in Table 1, for Examples 1 and 2 and Comparative Examples 1 to 3, the silane solution (A-171 (manufactured by Nihon Unicar)) and the catalyst master batch (Moldex CM846 (manufactured by Apco Corporation)) were used. It was decided to add.
The above resin, silane solution and catalyst master batch were charged from a hopper, and using a 120 mm diameter single screw extruder, the mixing zone was set to 180 ° C. or lower, the graft reaction zone was set to 220 ° C. or lower, and the screw rotation speed was set to 50 rpm. An insulated wire covered with a resin composition was produced by extruding an aluminum conductor having a cross-sectional area of 240 mm 2 with a thickness of 3 mm. The manufactured insulated wire was immersed in a warm water bath at 80 ° C. for 24 hours for crosslinking treatment.
Moreover, in Example 3 and Comparative Examples 4 and 5, using a 120 mm diameter single screw extruder, the molding temperature was set to 170 to 190 ° C., the screw rotation speed was set to 90 rpm, and the aluminum conductor having a cross-sectional area of 240 mm 2 was thick. The insulated wire covered with the resin composition was manufactured by extrusion with a wall thickness of 3 mm.
（評価方法）
実施例１，２および比較例１〜３で製造した絶縁電線及び絶縁体の評価は電力用規格Ｃ−２５０屋外用鋼心アルミ導体架橋ポリエチレン絶縁電線（ＡＣＳＲ−ＯＣ）に準拠し以下の方法により測定した。
規格値
絶縁体の引張り強さ ９．８１ＭＰａ以上
絶縁体伸び ３５０％
加熱試験 引張伸び、強さとも加熱前の値の８０％以上
耐加熱変形試験 厚さの減少率４０％以下
耐トラッキング 噴霧回数１０１回においても、０．５Ａ以上の電流が
試料表面を流れないか、または燃え上がらないこと
耐電圧 １２，０００Ｖの試験電圧に１分間耐えること
(Evaluation methods)
Evaluation of the insulated wires and insulators produced in Examples 1 and 2 and Comparative Examples 1 to 3 is based on the power standard C-250 outdoor steel core aluminum conductor cross-linked polyethylene insulated wire (ACSR-OC) by the following method. It was measured.
Standard value Insulator tensile strength 9.81 MPa or more Insulator elongation 350%
Heating test 80% or more of the value before heating for both tensile elongation and strength Heat-resistant deformation test Thickness reduction rate 40% or less Tracking resistance Even when the number of sprays is 101, a current of 0.5 A or more is
Do not flow on the sample surface or burn up. Withstand voltage Withstand the test voltage of 12,000V for 1 minute.
実施例３および比較例４，５で製造した絶縁電線及び絶縁体の評価は電力用規格Ｃ−２４８屋外用鋼心アルミ導体ポリエチレン絶縁電線（ＡＣＳＲ−ＯＥ）に準拠し以下の方法により測定した。
規格値
絶縁体の引張り強さ ９．８１ＭＰａ以上
絶縁体伸び ３５０％
耐電圧 １２，０００Ｖの試験電圧に１分間耐えること
絶縁体評価
〔引張試験〕
ＪＩＳ Ｃ３００５に準じ引張速さは２００ｍｍ／ｍｉｎで行なう。
〔加熱試験〕
ＪＩＳ Ｃ３００５に準じ、加熱温度は１２０±３℃、９６ｈｒで行う。
絶縁電線評価
〔耐加熱変形試験〕
ＪＩＳ Ｃ３００５に準じ、加熱温度は１２０±３℃、加える荷重は２ｋｇで行う。
〔耐トラッキング性試験〕
ＪＩＳ Ｃ３００５に準じ、噴霧回数は１０１回で行なう。
〔耐電圧試験〕
ＪＩＳ Ｃ３００５に準じ行なう。
（評価結果）
各項目の評価の結果は表２、表３のとおりである。
The evaluation of the insulated wires and insulators produced in Example 3 and Comparative Examples 4 and 5 was measured by the following method based on the power standard C-248 outdoor steel core aluminum conductor polyethylene insulated wire (ACSR-OE).
Standard value Insulator tensile strength 9.81 MPa or more Insulator elongation 350%
Withstand voltage 12,000V endurance for 1 minute Insulator evaluation [Tensile test]
The tensile speed is 200 mm / min according to JIS C3005.
[Heating test]
According to JIS C3005, the heating temperature is 120 ± 3 ° C. and 96 hours.
Insulated wire evaluation (heat deformation resistance test)
According to JIS C3005, the heating temperature is 120 ± 3 ° C. and the applied load is 2 kg.
[Tracking resistance test]
According to JIS C3005, the number of sprays is 101.
〔anti-voltage test〕
Perform in accordance with JIS C3005.
(Evaluation results)
Tables 2 and 3 show the results of evaluation of each item.
対して、再生材の配合量が多い比較例１、２、４では、引張試験や耐トラッキング性試験において、規格値を満足させることができず、比較例３においては、再生材のゲル分率が高すぎるために、伸びが劣る結果となった。また、単に微粉化した架橋ポリエチレンを本発明の再生材の代わりに配合した比較例５は、引張試験の伸びが大幅に劣る結果となった。
On the other hand, in Comparative Examples 1, 2, and 4 in which the amount of the recycled material is large, the standard value cannot be satisfied in the tensile test and the tracking resistance test. In Comparative Example 3, the gel fraction of the recycled material is not satisfied. Was too high, resulting in poor elongation. Further, Comparative Example 5 in which simply pulverized cross-linked polyethylene was blended in place of the recycled material of the present invention resulted in significantly inferior tensile elongation.
Claims (3)
An insulated wire manufactured by the method according to claim 1 or 2 , or a cable having the insulated wire.
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| JP2006066238A (en) * | 2004-08-27 | 2006-03-09 | Yazaki Corp | Wire and cable |
| JP2010125696A (en) * | 2008-11-27 | 2010-06-10 | Nippon Kasen Kk | Surface roughened resin coated wire and wire gauze |
| JP5356044B2 (en) * | 2009-01-09 | 2013-12-04 | 株式会社ビスキャス | Watertight material, watertight insulated wire, method for manufacturing the same, and power cable |
| JP2010177183A (en) * | 2009-02-02 | 2010-08-12 | Viscas Corp | Insulated wire in which anti-tracking performance is improved, and manufacturing method thereof |
| JP5390912B2 (en) * | 2009-04-08 | 2014-01-15 | 株式会社ビスキャス | Method for producing crosslinked insulated wire and crosslinked insulated wire |
| JP5367480B2 (en) * | 2009-07-08 | 2013-12-11 | 株式会社ビスキャス | Power cable |
| JP5495039B2 (en) * | 2010-03-29 | 2014-05-21 | 株式会社ビスキャス | Insulated wires and cables |
| JP5555553B2 (en) * | 2010-06-15 | 2014-07-23 | 矢崎エナジーシステム株式会社 | Extruded product manufacturing method and electric wire / cable |
| JP2012028196A (en) * | 2010-07-26 | 2012-02-09 | Viscas Corp | Electric wire |
| JP2011219275A (en) * | 2011-04-14 | 2011-11-04 | Bee Best Work Inc | Antiseismic cushion stopper |
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