JP5695886B2 - Aluminum wire and insulator composition for aluminum wire - Google Patents
Aluminum wire and insulator composition for aluminum wire Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 title claims description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 49
- 239000000203 mixture Substances 0.000 title claims description 30
- 239000012212 insulator Substances 0.000 title claims description 28
- 229920005989 resin Polymers 0.000 claims description 43
- 239000011347 resin Substances 0.000 claims description 43
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 16
- 229920013716 polyethylene resin Polymers 0.000 claims description 15
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 229910001385 heavy metal Inorganic materials 0.000 claims description 13
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 239000006078 metal deactivator Substances 0.000 claims description 12
- 229920001038 ethylene copolymer Polymers 0.000 claims description 11
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical group [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 239000004800 polyvinyl chloride Substances 0.000 description 21
- 229920000915 polyvinyl chloride Polymers 0.000 description 20
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003063 flame retardant Substances 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 3
- 239000011256 inorganic filler Substances 0.000 description 3
- 229910003475 inorganic filler Inorganic materials 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
- 239000011976 maleic acid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- PWZFXELTLAQOKC-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide;tetrahydrate Chemical compound O.O.O.O.[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O PWZFXELTLAQOKC-UHFFFAOYSA-A 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 229960001545 hydrotalcite Drugs 0.000 description 2
- 229910001701 hydrotalcite Inorganic materials 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Description
本発明は、ＰＶＣ電線との共存下での使用に適したアルミニウム電線及びアルミニウム電線用絶縁体組成物に関する。 The present invention relates to an aluminum electric wire suitable for use in the presence of a PVC electric wire and an insulator composition for an aluminum electric wire.
従来の自動車用耐熱電線の絶縁体材料としては、オレフィン系樹脂（特にポリエチレン樹脂）に難燃剤として臭素系難燃剤を添加した樹脂組成物がある。近年は、人体に対する影響や機器の腐食の原因となるハロゲン系ガスを発生させないことが要求されている。このため、臭素系難燃剤に代えて無機系フィラー（水酸化マグネシウム、水酸化アルミニウム）を難燃剤として添加した組成物（ノンハロゲン組成物）が主流となっている(例えば、特許文献１および特許文献２参照)。 As a conventional insulator material for heat-resistant electric wires for automobiles, there is a resin composition obtained by adding a brominated flame retardant as a flame retardant to an olefin resin (particularly, a polyethylene resin). In recent years, it has been demanded not to generate a halogen-based gas that causes an influence on the human body and causes corrosion of equipment. For this reason, a composition (non-halogen composition) in which an inorganic filler (magnesium hydroxide, aluminum hydroxide) is added as a flame retardant instead of a brominated flame retardant has become the mainstream (for example, Patent Document 1 and Patent Document) 2).
現在でも自動車用のワイヤーハーネスとしては、耐熱性の高いポリ塩化ビニル（ＰＶＣ）で絶縁されたＰＶＣ電線が使用される場合が多い。上述の無機系フィラーを難燃剤として添加した組成物（ノンハロゲン組成物）を絶縁被覆材料とする電線がＰＶＣ電線と混在されて、エンジンルームなどの高温下に配索されると、絶縁被覆が著しく短期間に熱劣化してしまうことが危惧されている。特に、水酸化マグネシウムを難燃剤としたノンハロゲン系の絶縁体は、ＰＶＣ電線からの可塑剤の移行により劣化を促進させてしまう傾向が確認されている。また、無機系フィラーを難燃剤として添加したノンハロゲン系の絶縁体では、難燃性を確保するために水酸化マグネシウムなどの難燃剤の添加量が多いため、伸び、柔軟性、耐摩耗性などの各種機械的特性が、本来樹脂が持つ特性よりも大幅に低下するという問題があった。このように、ＰＶＣ電線との共存下では、特に高耐熱部位では水酸化マグネシウムが使用できない状況となっている。 Even today, PVC wires insulated with polyvinyl chloride (PVC) having high heat resistance are often used as wire harnesses for automobiles. When an electric wire using a composition (non-halogen composition) containing the above inorganic filler as a flame retardant is mixed with a PVC electric wire and wired at a high temperature such as an engine room, the insulating coating is remarkably formed. There is a concern that heat will deteriorate in a short time. In particular, it has been confirmed that non-halogenous insulators using magnesium hydroxide as a flame retardant promote the deterioration due to the migration of the plasticizer from the PVC wire. In addition, non-halogen insulators with inorganic fillers added as flame retardants have a large amount of flame retardants such as magnesium hydroxide added to ensure flame retardancy, so elongation, flexibility, wear resistance, etc. There was a problem that various mechanical properties were significantly lower than the properties inherent to the resin. Thus, under the coexistence with the PVC electric wire, magnesium hydroxide cannot be used particularly at a high heat resistant portion.
そこで、本発明の目的は、ＰＶＣ電線との共存下での使用に際して柔軟性などの機械的特性や耐熱性の低下を抑制でき、しかも絶縁被覆において難燃剤の添加量を少なくすることを可能とするアルミニウム電線及びアルミニウム電線用絶縁体組成物を提供することにある。 Accordingly, an object of the present invention is to suppress a decrease in mechanical properties such as flexibility and heat resistance when used in the presence of a PVC electric wire, and to reduce the amount of flame retardant added in an insulation coating. An object of the present invention is to provide an aluminum wire and an insulator composition for aluminum wires .
第１の特徴に係る発明は、アルミニウム電線であって、（Ａ）ポリエチレン樹脂と、（Ｂ）エチレン共重合体樹脂とでなるベース樹脂１００重量部に対して、難燃性を有する（Ｃ）金属水和物が４０重量部以上７０重量部未満、（Ｄ）酸化防止剤および（Ｅ）重金属不活性化剤が合わせて１．０〜６．０重量部以上、添加され、且つ架橋されている絶縁体組成物で、アルミニウム導体を被覆してなることを要旨とする。また、第２の特徴に係る発明は、アルミニウム電線用絶縁体組成物であって、（Ａ）ポリエチレン樹脂と、（Ｂ）エチレン共重合体樹脂とでなるベース樹脂１００重量部に対して、難燃性を有する（Ｃ）金属水和物を４０重量部以上７０重量部未満、（Ｄ）酸化防止剤および（Ｅ）重金属不活性化剤が合わせて１．０〜６．０重量部が添加され、且つ架橋されてなることを要旨とする。 The invention according to the first feature is an aluminum electric wire having flame retardancy with respect to 100 parts by weight of a base resin comprising (A) a polyethylene resin and (B) an ethylene copolymer resin (C) 40 parts by weight or more and less than 70 parts by weight of a metal hydrate, (D) an antioxidant and (E) a heavy metal deactivator are added in an amount of 1.0 to 6.0 parts by weight or more and crosslinked. The gist is to coat the aluminum conductor with an insulating composition. The invention according to the second feature is an insulator composition for an aluminum electric wire, which is difficult with respect to 100 parts by weight of a base resin comprising (A) a polyethylene resin and (B) an ethylene copolymer resin. Flammable (C) metal hydrate is added in an amount of 40 to 70 parts by weight , and (D) antioxidant and (E) heavy metal deactivator are added in an amount of 1.0 to 6.0 parts by weight. The gist of the present invention is that it is crosslinked.
なお、（Ａ）ポリエチレン樹脂と（Ｂ）エチレン共重合体樹脂のいずれかは、一部酸変性処理された樹脂が含まれることが好ましい。また、本発明に係るアルミニウム電線は、ＰＶＣ電線との共存下で使用することが好ましい。 In addition, it is preferable that one of the (A) polyethylene resin and the (B) ethylene copolymer resin includes a partially acid-modified resin. Moreover, it is preferable to use the aluminum electric wire which concerns on this invention in coexistence with a PVC electric wire.
本発明に係るアルミニウム電線及びアルミニウム電線用絶縁体組成物は、一部酸変性された樹脂がベース樹脂に含まれるため、金属水和物を樹脂に相溶させて樹脂自体の機械特性の低下を抑制する作用と、難燃性を向上させる作用とを有する。 In the aluminum wire and the insulator composition for an aluminum wire according to the present invention, since the resin partially modified with acid is contained in the base resin, the metal hydrate is dissolved in the resin to reduce the mechanical properties of the resin itself. It has the effect | action which suppresses and the effect | action which improves a flame retardance.
本発明に係るアルミニウム電線及びアルミニウム電線用絶縁体組成物では、従来の銅導体に比べて導体（アルミニウム）からの劣化の影響が少ないため、絶縁体組成物に添加する酸化防止剤および重金属不活性化剤の量を少なくしても、耐熱性ならびに難燃性を向上させることができる。 In the aluminum wire and the insulator composition for an aluminum wire according to the present invention, since there is less influence of deterioration from the conductor (aluminum) than the conventional copper conductor, the antioxidant and heavy metal inertness added to the insulator composition Even if the amount of the agent is reduced, the heat resistance and flame retardancy can be improved.
金属水和物としては、水酸化マグネシウム、水酸化アルミニウム、水酸化カルシウム、この他にハイドロタルサイト、タルク、クレー等の金属水酸化物を含有して難燃性を示すものを用いることができる。 As metal hydrates, magnesium hydroxide, aluminum hydroxide, calcium hydroxide, and other metal hydroxides such as hydrotalcite, talc, clay, etc. that exhibit flame retardancy can be used. .
本発明によれば、ＰＶＣ電線との共存下での使用に際して柔軟性などの機械的特性や耐熱性の低下を抑制でき、しかも絶縁体組成物における難燃剤の添加量を少なくすることを可能とするアルミニウム電線及びアルミニウム電線用絶縁体組成物を実現できる。 ADVANTAGE OF THE INVENTION According to this invention, when using in the presence of a PVC electric wire, it is possible to suppress a decrease in mechanical properties such as flexibility and heat resistance, and to reduce the amount of flame retardant added in the insulator composition. An aluminum wire and an insulator composition for an aluminum wire can be realized.
以下、本発明に係るアルミニウム電線用絶縁体組成物およびそれを用いたアルミニウム電線について詳細に説明する。 Hereinafter, the insulator composition for an aluminum electric wire according to the present invention and the aluminum electric wire using the same will be described in detail.
[アルミニウム電線用絶縁体組成物]
本発明の実施の形態に係るアルミニウム電線に用いられる絶縁体組成物は、アルミニウム電線用絶縁体組成物であって、（Ａ）ポリエチレン樹脂と、（Ｂ）エチレン共重合体樹脂とでなるベース樹脂１００重量部に対して、難燃性を有する（Ｃ）金属水和物を４０〜１２０重量部、（Ｄ）酸化防止剤および（Ｅ）重金属不活性化剤が合わせて１．０〜３．０重量部が添加され、且つ架橋されてなる。
[Insulator composition for aluminum wires]
The insulator composition used for the aluminum wire according to the embodiment of the present invention is an insulator composition for an aluminum wire, and is a base resin comprising (A) a polyethylene resin and (B) an ethylene copolymer resin. 40 to 120 parts by weight of (C) metal hydrate having flame retardancy with respect to 100 parts by weight, and (D) antioxidant and (E) heavy metal deactivator are combined in an amount of 1.0 to 3. 0 parts by weight is added and crosslinked.
密度の異なる複数種のポリエチレン樹脂とは、高密度ポリエチレン(ＨＤＰＥ)、中密度ポリエチレン(ＭＤＰＥ)、低密度ポリエチレン(ＬＤＰＥ)、直鎖状低密度ポリエチレン(ＬＬＤＰＥ)などを挙げることができる。 Examples of the plural types of polyethylene resins having different densities include high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), and linear low density polyethylene (LLDPE).
ここで、（Ａ）のポリエチレン樹脂は、例えば、マレイン酸などの不飽和カルボン酸を用いて、一部酸変性された樹脂が含まれることが好ましい。 Here, the polyethylene resin (A) preferably includes a resin that is partially acid-modified using an unsaturated carboxylic acid such as maleic acid.
金属水和物としては、水酸化マグネシウム、水酸化アルミニウム、水酸化カルシウム、この他にハイドロタルサイト、タルク、クレー等の金属水酸化物を含有して難燃性を示すものを用いることができる。 As metal hydrates, magnesium hydroxide, aluminum hydroxide, calcium hydroxide, and other metal hydroxides such as hydrotalcite, talc, clay, etc. that exhibit flame retardancy can be used. .
本実施の形態に係るアルミニウム電線に用いられる絶縁体組成物では、ベース樹脂が一部酸変性された樹脂を含むため、金属水和物を樹脂に相溶させて樹脂自体の機械特性の低下を抑制する作用と、難燃性を向上させる作用とを有する。 In the insulator composition used for the aluminum electric wire according to the present embodiment, since the base resin includes a resin that is partially acid-modified, the metal hydrate is dissolved in the resin to reduce the mechanical properties of the resin itself. It has the effect | action which suppresses and the effect | action which improves a flame retardance.
本実施の形態に係るアルミニウム電線では、従来の銅導体に比べて導体（アルミニウム）からの劣化の影響が少ないため、酸化防止剤および重金属不活性化剤は、従来の電線用絶縁体組成物に比べて少なくすることができる。具体的には、ベース樹脂１００重量部に対して酸化防止剤および重金属不活性化剤を１．０〜３重量部の割合で添加すればよい。 In the aluminum electric wire according to the present embodiment, since the influence of deterioration from the conductor (aluminum) is less than that of the conventional copper conductor, the antioxidant and the heavy metal deactivator are added to the conventional electric wire insulator composition. It can be reduced in comparison. Specifically, the antioxidant and the heavy metal deactivator may be added at a ratio of 1.0 to 3 parts by weight with respect to 100 parts by weight of the base resin.
[アルミニウム電線]
図１は、本発明の実施の形態に係るアルミニウム電線１を示す断面図である。図１に示すように、このアルミニウム電線１は、複数本のアルミニウム導体２の束を、上記アルミニウム電線用絶縁体組成物からなる絶縁被覆３で被覆して構成される。なお、絶縁被覆３は、押出工程を経た後、電子線やその他の方法を使った架橋処理が施されている。このようなアルミニウム電線１は、難燃性が高く、かつ耐摩耗性などの機械的特性が高い難燃性樹脂組成物で被覆されているため、自動車用電線として用いた場合も信頼性が高い。
[Aluminum wire]
FIG. 1 is a cross-sectional view showing an aluminum electric wire 1 according to an embodiment of the present invention. As shown in FIG. 1, this aluminum electric wire 1 is configured by covering a bundle of a plurality of
本実施の形態に係るアルミニウム電線１では、ＰＶＣ電線との共存下での使用に際して柔軟性などの機械的特性や耐熱性の低下を抑制でき、しかも難燃剤の添加量を少なくすることを可能とする。 In the aluminum electric wire 1 according to the present embodiment, it is possible to suppress a decrease in mechanical properties such as flexibility and heat resistance when used in the presence of a PVC electric wire, and to reduce the amount of flame retardant added. To do.
本発明に係るアルミニウム電線では、従来の銅導体に比べて導体（アルミニウム）からの劣化の影響が少ないため、絶縁体組成物に添加する酸化防止剤および重金属不活性化剤の量を少なくしても、耐熱性ならびに難燃性を向上させることができる。 In the aluminum electric wire according to the present invention, since the influence of deterioration from the conductor (aluminum) is less than that of the conventional copper conductor, the amount of antioxidant and heavy metal deactivator added to the insulator composition is reduced. In addition, heat resistance and flame retardancy can be improved.
[実施例]
以下、本発明の実施例、比較例について図２〜図５を用いて具体的に説明する。
[Example]
Examples of the present invention and comparative examples will be specifically described below with reference to FIGS.
[実施例、比較例で用いた配合樹脂および配合材料]
（Ａ）ポリエチレン樹脂
ポリエチレン樹脂としては、高密度ポリエチレン(ＨＤＰＥ)と、低密度ポリエチレン(ＬＤＰＥ)とを用意した。また、一部酸変性された樹脂として、マレイン酸などで処理された変性ＨＤＰＥを用いた。
[Compound resins and compound materials used in Examples and Comparative Examples]
(A) Polyethylene resin As the polyethylene resin, high density polyethylene (HDPE) and low density polyethylene (LDPE) were prepared. In addition, modified HDPE treated with maleic acid or the like was used as a partially acid-modified resin.
（Ｂ）エチレン共重合体樹脂としては、エチレン・エチルアクリレート・コポリマー(ＥＥＡ)を用いた。このＥＥＡの一部酸変性された樹脂として、マレイン酸などで処理された変性ＥＥＡを用いた。 (B) As the ethylene copolymer resin, ethylene ethyl acrylate copolymer (EEA) was used. A modified EEA treated with maleic acid or the like was used as the partially acid-modified resin of EEA.
難燃性を有する金属水和物としては、水酸化マグネシウムを用いた。 Magnesium hydroxide was used as the metal hydrate having flame retardancy.
添加剤としては、酸化防止剤、重金属不活性化剤を用いた。 Antioxidants and heavy metal deactivators were used as additives.
（判定基準について）
○ＰＶＣ移行性については、ＰＶＣ電線と、各配合例の絶縁体を絶縁被覆とする電線をＰＶＣテープにハーフラップ巻きし、１３０℃で７００時間後に自己径巻き付けにて割れ・導体露出のないものを合格(○)、亀裂が生じるものを不合格（×）とした。
(About judgment criteria)
○ For PVC transferability, PVC wires and wires with insulation coatings of the respective blending examples are wrapped around PVC tape in half wrap, and there is no cracking or conductor exposure by self-winding after 130 hours at 130 ° C. Was determined to be acceptable (◯), and a crack occurred as unacceptable (x).
○絶縁体伸び率については、ＪＩＳ Ｂ ７７２１に準拠して行った。絶縁電線を１５０ｍｍの長さに切り出し、導体を取り除いて被覆層のみの管状試験片とした後、その中央部に５０ｍｍの間隔で標線を記した。次いで、室温下にて試験片の両端を引張試験機のチャックに取り付けた後、引張速度２５〜５００ｍｍ／分で引っ張り、標線間の距離を測定した。伸びが１５０％以上のものを合格（○）とし、それより低いものを不合格（×）とした。 O Insulator elongation was performed according to JIS B 7721. The insulated wire was cut out to a length of 150 mm, the conductor was removed to form a tubular test piece having only a coating layer, and marked lines were marked at intervals of 50 mm in the center. Next, after both ends of the test piece were attached to the chuck of the tensile tester at room temperature, the test piece was pulled at a pulling speed of 25 to 500 mm / min, and the distance between the marked lines was measured. Those having an elongation of 150% or more were evaluated as acceptable (◯), and those lower than that were evaluated as unacceptable (x).
○摩耗性試験(荷重７Ｎ)については、スクレープ摩耗試験装置を用いて行った。すなわち、長さ約１ｍの絶縁電線をサンプルホルダーに載置し、クランプで固定する。そして、絶縁電線の先端に直径０．４５ｍｍのピアノ線を備えるプランジを、押圧を用いて総荷重７Ｎで絶縁電線に押し当てて往復させ（往復距離１４ｍｍ）、絶縁電線の被覆層が摩耗してプランジのピアノ線が絶縁電線の導体に接するまでの往復回数を測定し、１５０回以上のものを合格（○）とし、１５０回未満のものを不合格（×）とした。 ○ The wear test (load 7N) was performed using a scrape wear tester. That is, an insulated wire having a length of about 1 m is placed on a sample holder and fixed with a clamp. Then, a plunge provided with a piano wire with a diameter of 0.45 mm at the tip of the insulated wire is pressed against the insulated wire with a total load of 7 N using a pressure and reciprocated (reciprocating distance 14 mm), and the coated layer of the insulated wire is worn away. The number of reciprocations until the plunge piano wire contacted the conductor of the insulated wire was measured, and those with 150 times or more were judged as acceptable (O), and those with less than 150 times were judged as unacceptable (x).
○難燃性については、長さ６００ｍｍ以上の絶縁電線サンプルを用意し、傾き４５度傾斜に固定して上端から５００ｍｍ±５ｍｍの部分にプンゼンバーナーにて１５秒間元炎を当てた後に消炎するまでの時間が７０秒以内のものを合格(○)、それ以上を不合格(×)とした。 ○ For flame retardancy, prepare an insulated wire sample with a length of 600 mm or more, fix it at a 45-degree slope, apply a flame to the 500 mm ± 5 mm section from the upper end with a Punsen burner for 15 seconds, and extinguish the flame. Those with a time of up to 70 seconds were regarded as acceptable (◯), and more than that were regarded as unacceptable (×).
以下、本発明の具体的な実施例を説明するともに、実施例と比較例とを比較する。実施例１〜１９、比較例１〜８は、図２〜図５に示した配合で材料をブレンドした後、１６０℃の温度で溶融混練して押出成型機で押出成形を行って絶縁被覆を被覆し、電子線を用いた架橋処理を施した。図２〜図５には、上記ＰＶＣ移行性、絶縁体伸び率、摩耗性試験、難燃性の試験結果も合わせて記載する。 Hereinafter, specific examples of the present invention will be described, and examples and comparative examples will be compared. In Examples 1 to 19 and Comparative Examples 1 to 8, materials were blended with the formulations shown in FIGS. 2 to 5, and then melt-kneaded at a temperature of 160 ° C. and extrusion molding was performed with an extrusion molding machine. It covered and the crosslinking process using an electron beam was performed. FIGS. 2 to 5 also show the PVC migration, insulator elongation, abrasion test, and flame retardancy test results.
（実施例１〜１９）
図２および図３に示すように、実施例１〜１９は、複数種のポリエチレン樹脂とエチレン共重合体樹脂を１００重量部、これに難燃性を有する金属水和物として水酸化マグネシウム４０〜１２０重量部を配合し、酸化防止剤および重金属不活性化剤を合わせて１．０〜３．０重量部を配合し、押出工程後に架橋処理を施したアルミニウム電線とした。
(Examples 1 to 19)
As shown in FIG. 2 and FIG. 3, Examples 1 to 19 are 100 parts by weight of a plurality of kinds of polyethylene resins and ethylene copolymer resins, and magnesium hydroxide 40 to 40 as a metal hydrate having flame retardancy. 120 parts by weight was blended, and an antioxidant and a heavy metal deactivator were combined to blend 1.0 to 3.0 parts by weight, and an aluminum electric wire subjected to a crosslinking treatment after the extrusion step was obtained.
（比較例１〜８）
比較例１〜８は、複数種のポリエチレン樹脂とエチレン共重合体樹脂を１００重量部、これに難燃性を有する金属水和物として水酸化マグネシウム３５〜４０重量部、１２０〜１２５重量部を配合し、酸化防止剤および重金属不活性化剤を合わせて０．９重量部、１．０重量部、３．５重量部、６．０重量部のものをそれぞれ配合し、押出工程後に架橋処理を施したアルミニウム電線（図４参照）と銅電線（図５参照）を作製した。
(Comparative Examples 1-8)
In Comparative Examples 1 to 8, 100 parts by weight of a plurality of types of polyethylene resins and ethylene copolymer resins, 35 to 40 parts by weight of magnesium hydroxide, and 120 to 125 parts by weight as a metal hydrate having flame retardancy thereto Blended, 0.9 parts by weight, 1.0 parts by weight, 3.5 parts by weight, and 6.0 parts by weight of the antioxidant and heavy metal deactivator are combined, and after the extrusion process, a crosslinking treatment is performed. An aluminum electric wire (see FIG. 4) and a copper electric wire (see FIG. 5) were prepared.
図２〜図５に示した結果から、ベース樹脂１００重量部に対して、金属水和物が４０〜１２０重量部の範囲である実施例１〜１２は、上記ＰＶＣ移行性、絶縁体伸び率、摩耗性試験、難燃性の試験結果が良好であった。 From the results shown in FIGS. 2 to 5, Examples 1 to 12 in which the metal hydrate is in the range of 40 to 120 parts by weight with respect to 100 parts by weight of the base resin are the PVC migration property and the insulator elongation rate. The results of abrasion test and flame retardancy were good.
これに対して、比較例１〜８では、ベース樹脂１００重量部に対して、金属水和物が３５〜４０重量部、１２０〜１２５重量部であるため、上記ＰＶＣ移行性、絶縁体伸び率、摩耗性試験、難燃性の試験結果のいずれかが不合格(×)となった。 On the other hand, in Comparative Examples 1-8, since the metal hydrate is 35 to 40 parts by weight and 120 to 125 parts by weight with respect to 100 parts by weight of the base resin, the PVC transition property and the insulator elongation rate. , Either the abrasion test or the flame retardancy test result failed (x).
また、ベース樹脂には、密度の異なる複数種のポリエチレン樹脂が含まれることが好ましく、一部酸変性された樹脂が含まれることがさらに好ましい。これは、一部酸変性された樹脂が金属水和物を相溶させて樹脂自体の機械特性を低下させないようにする作用を有し、難燃性を向上させる働きがあるからである。 The base resin preferably includes a plurality of types of polyethylene resins having different densities, and more preferably includes a partially acid-modified resin. This is because the partially acid-modified resin has an effect of preventing the mechanical properties of the resin itself from being lowered by compatibilizing the metal hydrate and improving flame retardancy.
なお、本発明に係るアルミニウム電線は、絶縁被覆を架橋処理することにより耐熱性を向上させているため、樹脂分に架橋処理によって分解反応の方が多く発生する樹脂の割合が多くなることは好ましくない。 In addition, since the aluminum electric wire according to the present invention has improved heat resistance by crosslinking the insulating coating, it is preferable that the proportion of the resin in which the decomposition reaction occurs more frequently due to the crosslinking treatment in the resin component is preferable. Absent.
また、上記結果から、添加剤である酸化防止剤、重金属不活性化剤は不可欠であり、合わせた配合量が１．０〜３．０重量部の範囲が望ましい。１．０重量部より少ないとこれらの効力がうまく発揮できず、３重量部より多いと大きな向上効果は確認できずにブリードやコストを高める原因となる。 Moreover, from the said result, the antioxidant and heavy metal deactivator which are additives are indispensable, and the total compounding quantity is 1.0-3.0 weight part. When the amount is less than 1.0 part by weight, these effects cannot be exhibited well, and when the amount is more than 3 parts by weight, a large improvement effect cannot be confirmed and causes bleed and cost.
上述したように、銅導体よりもアルミニウム導体の方が、少ない添加剤添加量によって耐熱性や、ＰＶＣ移行性といった従来の問題を解決することが可能となる。また、アルミニウム導体とすることにより、難燃性向上に寄与し、金属水和物(フィラー)添加による機械特性の低下を妨げる働きのある柔軟樹脂(エチレン共重合体樹脂)の添加によって、難燃剤の添加量を少なくすることが可能となり、上述の試験のように、各特性を向上させることが可能となった。 As described above, the aluminum conductor can solve the conventional problems such as heat resistance and PVC transferability with a smaller additive amount than the copper conductor. In addition, by using an aluminum conductor, a flame retardant can be obtained by adding a flexible resin (ethylene copolymer resin) that contributes to improving flame retardancy and prevents deterioration of mechanical properties due to the addition of metal hydrate (filler). As a result, it was possible to improve each characteristic as in the above-described test.
１…アルミニウム電線
２…アルミニウム導体
３…絶縁被覆
DESCRIPTION OF SYMBOLS 1 ... Aluminum
Claims (5)
アルミニウム導体に被覆してなることを特徴とするアルミニウム電線。 (C) The metal hydrate having flame retardancy is 40 parts by weight or more and less than 70 parts by weight with respect to 100 parts by weight of the base resin composed of (A) polyethylene resin and (B) ethylene copolymer resin. An insulator composition in which 1.0 to 6.0 parts by weight of D) antioxidant and (E) heavy metal deactivator are added and crosslinked;
An aluminum electric wire characterized by being coated on an aluminum conductor.
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