JPH09147632A - Electric wire - Google Patents
Electric wireInfo
- Publication number
- JPH09147632A JPH09147632A JP7306028A JP30602895A JPH09147632A JP H09147632 A JPH09147632 A JP H09147632A JP 7306028 A JP7306028 A JP 7306028A JP 30602895 A JP30602895 A JP 30602895A JP H09147632 A JPH09147632 A JP H09147632A
- Authority
- JP
- Japan
- Prior art keywords
- electric wire
- plasticizer
- polyvinyl chloride
- resin composition
- insulating material
- 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.)
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- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、自動車、その他
一般電子機器等の配線に用いられる電線に関し、特に自
動車のエンジンルーム内等の高温下において用いられる
電線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire used for wiring automobiles and other general electronic equipment, and more particularly to an electric wire used under high temperature such as in an engine room of an automobile.
【０００２】[0002]
【従来の技術】通常、電線の芯線の周囲に被覆された絶
縁材には、フタル酸系可塑剤やトリメリット系可塑剤等
のモノメリック型可塑剤（低分子量の可塑剤）を含有し
たポリ塩化ビニル樹脂組成物又はポリエチレン樹脂組成
物が用いられている。2. Description of the Related Art In general, the insulating material coated around the core wire of an electric wire is a polymer containing a monomeric plasticizer (low molecular weight plasticizer) such as phthalic acid plasticizer or trimellitic plasticizer. A vinyl chloride resin composition or a polyethylene resin composition is used.
【０００３】しかし、このようにモノメリック型可塑剤
を含有したポリ塩化ビニル樹脂組成物又はポリエチレン
樹脂組成物を絶縁材として用いた電線は、耐熱性が低い
という問題がある。このため、この電線を高温下におい
て使用すると絶縁材が軟化・変形し、絶縁不良や絶縁破
壊を生じるため、例えば、自動車のエンジンルーム内に
おける使用には適さない。However, an electric wire using a polyvinyl chloride resin composition or a polyethylene resin composition containing a monomeric plasticizer as an insulating material has a problem of low heat resistance. For this reason, when this electric wire is used at high temperature, the insulating material is softened and deformed, resulting in insulation failure and dielectric breakdown, which is not suitable for use in the engine room of an automobile, for example.
【０００４】そこで、耐熱性に優れた電線を得るため
に、電線の絶縁材として用いられた上記ポリ塩化ビニル
樹脂組成物又はポリエチレン樹脂組成物に架橋を施して
当該絶縁材の耐熱性を向上させるという方法がある。Therefore, in order to obtain an electric wire having excellent heat resistance, the polyvinyl chloride resin composition or the polyethylene resin composition used as the insulating material of the electric wire is crosslinked to improve the heat resistance of the insulating material. There is a method.
【０００５】[0005]
【発明が解決しようとする課題】ところが、電線の絶縁
材に架橋を施すためには、特殊な電子線照射装置や高価
な架橋剤・架橋助剤等を必要とし、コスト増大を招いて
いた。However, in order to cross-link the insulating material of the electric wire, a special electron beam irradiation device, an expensive cross-linking agent, a cross-linking auxiliary agent, etc. are required, resulting in an increase in cost.
【０００６】そこで、この発明は上述したような問題を
解決すべくなされたもので、耐熱性に優れた電線を低コ
ストで提供することを目的とする。Therefore, the present invention has been made to solve the above problems, and an object thereof is to provide an electric wire having excellent heat resistance at a low cost.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
め、この発明の請求項１記載の電線は、芯線の周囲に被
覆された絶縁材が、ポリメリック型可塑剤を含有したポ
リ塩化ビニル樹脂組成物よりなることを特徴とする。In order to solve the above problems, an electric wire according to claim 1 of the present invention is a polyvinyl chloride resin in which an insulating material coated around a core wire contains a polymeric plasticizer. It is characterized by comprising a composition.
【０００８】また、請求項２記載のように、前記ポリ塩
化樹脂組成物が、ポリ塩化ビニル１００重量部に対し
て、前記ポリメリック型可塑剤を３０〜５５重量部含有
したものであってもよい。Further, as described in claim 2, the polychlorinated resin composition may contain 30 to 55 parts by weight of the polymeric plasticizer with respect to 100 parts by weight of polyvinyl chloride. .
【０００９】なお、請求項３記載のように、前記ポリメ
リック型可塑剤はポリエステル系可塑剤であってもよ
く、さらに、請求項４記載のように、このポリエステル
系可塑剤はアジピン酸ポリエステル系可塑剤、セバチン
酸ポリエステル系可塑剤又はフタル酸ポリエステル系可
塑剤であってもよい。The polymer plasticizer may be a polyester plasticizer, and the polyester plasticizer may be adipic acid polyester plasticizer. Agent, sebacic acid polyester plasticizer or phthalic acid polyester plasticizer may be used.
【００１０】さらに、請求項５記載のように、前記ポリ
塩化ビニル樹脂組成物が鉛安定剤以外の安定剤を含有し
ているのが好ましい。Further, as described in claim 5, it is preferable that the polyvinyl chloride resin composition contains a stabilizer other than the lead stabilizer.
【００１１】[0011]
【発明の実施の形態】以下、この発明にかかる一実施形
態の電線について説明する。図１に示すように、この電
線は、複数の軟銅素線が撚合わされた芯線１の周囲に絶
縁材２が押出成形により被覆されている。BEST MODE FOR CARRYING OUT THE INVENTION An electric wire according to an embodiment of the present invention will be described below. As shown in FIG. 1, in this electric wire, an insulating material 2 is covered by extrusion molding around a core wire 1 in which a plurality of annealed copper wires are twisted together.
【００１２】上記絶縁材は、分子量が高く、高温下にお
ける粘度が高いポリメリック型可塑剤を含有したポリ塩
化ビニル樹脂組成物よりなる。The insulating material is a polyvinyl chloride resin composition containing a polymeric plasticizer having a high molecular weight and a high viscosity at high temperature.
【００１３】ポリ塩化ビニルは、その重合度は一般的に
１３００程度であるが、その重合度は大きいほど高温下
における耐熱性に優れる。しかし、重合度が３８００以
上であると押出成型の際の加工性が悪くなるので、本実
施形態に用いられるポリ塩化ビニルはその重合度が１３
００〜３８００のものを使用するのが好ましい。Polyvinyl chloride generally has a degree of polymerization of about 1300, and the higher the degree of polymerization, the better the heat resistance at high temperatures. However, if the degree of polymerization is 3800 or more, the workability during extrusion molding deteriorates. Therefore, the polyvinyl chloride used in this embodiment has a degree of polymerization of 13 or more.
It is preferable to use those of 00-3800.
【００１４】また、上記ポリメリック型可塑剤として
は、例えば、ポリエステル系可塑剤が挙げられ、より具
体的には、２５゜Ｃにおける粘度が１０００ｃＰ以上で
あるアジピン酸ポリエステル系可塑剤、セバチン酸ポリ
エステル系可塑剤又はフタル酸ポリエステル系可塑剤が
挙げられる。Examples of the above-mentioned polymeric plasticizers include polyester plasticizers, and more specifically, adipic acid polyester plasticizers and sebacic acid polyester plastics having a viscosity at 25 ° C. of 1000 cP or more. Examples include plasticizers and phthalic acid polyester-based plasticizers.
【００１５】そして、ポリメリック型可塑剤の添加量
は、ポリ塩化ビニル１００重量部に対して３０〜５５重
量部が好ましい。３０重量部未満では、その可塑剤を添
加する際の分散性が低下すると共に、完成した電線の柔
軟性に欠けるという問題があり、また、５５重量部以上
では高温下における耐熱性に劣るからである。The amount of the polymeric plasticizer added is preferably 30 to 55 parts by weight based on 100 parts by weight of polyvinyl chloride. If it is less than 30 parts by weight, the dispersibility at the time of adding the plasticizer is lowered, and the flexibility of the completed electric wire is lacking, and if it is 55 parts by weight or more, the heat resistance at high temperature is poor. is there.
【００１６】なお、このポリ塩化ビニル樹脂組成物に添
加する安定剤は、鉛安定剤以外の安定剤、例えば、バリ
ウム−亜鉛系安定剤又はカルシウム−亜鉛系安定剤が用
いられている。これは、ポリエステル系可塑剤と鉛とが
共存すると、ポリエステル系可塑剤が電線の絶縁材表面
へ滲み出してしまうからである。The stabilizer added to the polyvinyl chloride resin composition is a stabilizer other than the lead stabilizer, for example, barium-zinc stabilizer or calcium-zinc stabilizer. This is because if the polyester plasticizer and lead coexist, the polyester plasticizer will exude to the surface of the insulating material of the electric wire.
【００１７】以上のように構成された電線によると、芯
線の周囲に被覆された絶縁材が、従来のモノメリック型
可塑剤に代えて高温下における粘度が高いポリメリック
型可塑剤を含有したポリ塩化ビニル樹脂組成物よりなる
ため、高温下においても電線の絶縁材が軟化せず、耐熱
性が向上する。従って、例えば、自動車のエンジンルー
ム内のような高温下における使用に適する。According to the electric wire constructed as described above, the insulating material coated around the core wire is a polychlorinated material containing a polymeric plasticizer having a high viscosity at high temperature in place of the conventional monomeric plasticizer. Since it is made of the vinyl resin composition, the insulating material of the electric wire is not softened even at high temperature, and the heat resistance is improved. Therefore, it is suitable for use under high temperature, for example, in the engine room of an automobile.
【００１８】また、従来のように特殊な架橋工程や架橋
設備、架橋剤、架橋助剤等を必要としないので、低コス
トな電線が得られる。Further, unlike the conventional case, a special cross-linking step, a cross-linking facility, a cross-linking agent, a cross-linking aid, etc. are not required, so that a low-cost electric wire can be obtained.
【００１９】以下に、本実施形態の一実施例にかかる電
線と、従来にかかる電線とをそれぞれ製造し、それらを
加熱した際の変形率等について述べる。Hereinafter, the deformation rate and the like when the electric wire according to one example of this embodiment and the electric wire according to the related art are manufactured and heated, will be described.
【００２０】[0020]
【表１】 [Table 1]
【００２１】即ち、本実施例にかかる電線は、芯線の周
囲に被覆された絶縁材として、表１に示すように、重合
度２３５０のポリ塩化ビニル１００重量部に対して、可
塑剤としてポリエステル系可塑剤４０重量部、充填剤と
して炭酸カルシウム１０重量部、安定剤としてバリウム
−亜鉛系安定剤８重量部を含有するポリ塩化ビニル樹脂
組成物を用いた。That is, as shown in Table 1, the electric wire according to the present embodiment has 100 parts by weight of polyvinyl chloride having a degree of polymerization of 2350 as an insulating material coated around the core wire, and polyester as a plasticizer. A polyvinyl chloride resin composition containing 40 parts by weight of a plasticizer, 10 parts by weight of calcium carbonate as a filler, and 8 parts by weight of a barium-zinc stabilizer as a stabilizer was used.
【００２２】なお、上記ポリ塩化ビニルは三菱化学製Ｋ
Ｒ−８７０、可塑剤は旭電化製ＰＮ−６５０アジピン酸
ポリエステル、安定剤は旭電化製Ｒｕｐ−１４をそれぞ
れ用いた。The polyvinyl chloride is K manufactured by Mitsubishi Chemical.
R-870, a plasticizer PN-650 adipic polyester manufactured by Asahi Denka Co., Ltd., and a stabilizer Rup-14 manufactured by Asahi Denka Co., Ltd. were respectively used.
【００２３】この電線の製造方法は、図２に示すよう
に、まず、計量された上記全材料をヘンシェルミキサー
等で混合・分散した後、加圧ニーダを用いてさらに均一
に混合・混練する。この後、混合された材料を単軸押出
機により造粒して、押出成型機により芯線の外周に押出
成形する。In the method of manufacturing this electric wire, as shown in FIG. 2, first, all the measured materials are mixed and dispersed by a Henschel mixer or the like, and then further uniformly mixed and kneaded by using a pressure kneader. Then, the mixed material is granulated by a single-screw extruder and extrusion-molded on the outer periphery of the core wire by an extruder.
【００２４】なお、上記のように、加圧ニーダを用いて
念入りに混合するのは、粘度の高いポリエステル系可塑
剤はポリ塩化ビニルに浸透しにくいからである。As described above, the reason why the pressure kneader is used for careful mixing is that the polyester plasticizer having high viscosity does not easily penetrate into polyvinyl chloride.
【００２５】また、上記製造過程における製造温度は１
９０゜Ｃ、完成した電線の被覆厚さは０．３ｍｍであ
る。The manufacturing temperature in the above manufacturing process is 1
At 90 ° C, the coating thickness of the completed electric wire is 0.3 mm.
【００２６】ここで、表１の比較例１は、可塑剤として
モノメリック型可塑剤を用いた従来の電線であり、即
ち、重合度２３５０のポリ塩化ビニル１００重量部に対
して、可塑剤としてトリオクチルトリメリテート（ＴＯ
ＴＭ）４０重量部、充填剤として炭酸カルシウム１０重
量部、安定剤として三塩基性硫酸塩安定剤８重量部及び
ステアリン酸塩安定剤０．５重量部を含有するポリ塩化
ビニル樹脂組成物を電線の絶縁材として用いたものであ
る。Comparative Example 1 in Table 1 is a conventional electric wire using a monomeric plasticizer as a plasticizer, that is, as a plasticizer with respect to 100 parts by weight of polyvinyl chloride having a polymerization degree of 2350. Trioctyl trimellitate (TO
TM) 40 parts by weight, 10 parts by weight of calcium carbonate as a filler, 8 parts by weight of a tribasic sulfate stabilizer as a stabilizer, and 0.5 parts by weight of a stearate stabilizer as an electric wire. Used as an insulating material.
【００２７】また、比較例２は、上記比較例１のポリ塩
化ビニル樹脂組成物にさらに架橋助剤としてトリメチロ
ールプロパントリメタクリレート５重量部を混入し、そ
の電線に６ＭＲａｄの電子線を照射して絶縁材を架橋し
た従来の電線である。In Comparative Example 2, 5 parts by weight of trimethylolpropane trimethacrylate as a crosslinking aid was further mixed into the polyvinyl chloride resin composition of Comparative Example 1 and the electric wire was irradiated with an electron beam of 6 MRad. It is a conventional electric wire in which an insulating material is cross-linked.
【００２８】なお、上記ポリ塩化ビニルは三菱化学製Ｋ
Ｒ−８７０、可塑剤（ＴＯＴＭ）は大日本インキ化学工
業製Ｗ−７００、架橋助剤（トリメチロールプロパント
リメタクリレート）は大日本インキ化学工業製ＴＤ−１
５００である。The polyvinyl chloride is K manufactured by Mitsubishi Chemical.
R-870, plasticizer (TOTM) is W-700 manufactured by Dainippon Ink and Chemicals, and crosslinking aid (trimethylolpropane trimethacrylate) is TD-1 manufactured by Dainippon Ink and Chemicals.
500.
【００２９】以上のように構成された各電線について、
加熱時における変形率を以下のように測定した。即ち、
電線を長さ３ｃｍに切断し、芯線を引き抜いて、その芯
線径に等しい金属製又は木製の丸棒を挿入したものを試
験片として準備する。そして、加熱前の電線径を常温で
測定し、その測定された値から芯線径を引いて、試験片
とされた電線の絶縁材の厚さｄ1を算出する。この後、
試験片を予め所定の温度ｔに加熱した加熱試験器内に収
容して３０分間加熱した後、試験片の上に１ｋｇのおも
りを載せて、同所定の温度ｔでさらに３０分間加熱す
る。このように加熱した後、試験片の電線径を測定し、
上記と同様に加熱後の絶縁材の厚さｄ2を算出する。そ
して、上記常温における加熱前の絶縁材の厚さｄ1と加
熱後の絶縁材の厚さｄ2とから、次式より変形率を算出
する。For each electric wire configured as described above,
The deformation rate during heating was measured as follows. That is,
An electric wire is cut into a length of 3 cm, a core wire is pulled out, and a metal or wooden round bar having the same core wire diameter is inserted as a test piece. Then, the wire diameter before heating is measured at room temperature, and the core wire diameter is subtracted from the measured value to calculate the thickness d 1 of the insulating material of the wire used as the test piece. After this,
The test piece is placed in a heating tester which has been heated to a predetermined temperature t in advance and heated for 30 minutes, and then a 1 kg weight is placed on the test piece and further heated at the predetermined temperature t for 30 minutes. After heating in this way, measure the wire diameter of the test piece,
Similarly to the above, the thickness d 2 of the insulating material after heating is calculated. Then, from the thickness d 1 of the insulating material before heating at room temperature and the thickness d 2 of the insulating material after heating, the deformation rate is calculated by the following equation.
【００３０】（変形率）＝１００・（ｄ1−ｄ2）／ｄ1 上記測定を、ｔ＝１２０゜Ｃ、１４０゜Ｃ、１６０゜
Ｃ、１８０゜Ｃの条件で４回行い、各電線のそれぞれの
温度についての変形率を算出する。(Deformation rate) = 100 (d 1 -d 2 ) / d 1 The above measurement was carried out four times under the conditions of t = 120 ° C., 140 ° C., 160 ° C. and 180 ° C. The deformation rate for each temperature is calculated.
【００３１】また、各電線のゲル分率を以下のように測
定した。即ち、絶縁材試料０．５ｇを精秤し、これをソ
ックスレー抽出機によってテトラヒドロフランを使用し
て１８時間抽出する。次に、この試料を１００゜Ｃの乾
燥機内で３時間乾燥した後、常温になるまで放冷してか
らその質量を精秤する。そして、試験前の質量に対する
試験後の質量の質量１００分率からゲル分率を測定す
る。The gel fraction of each electric wire was measured as follows. That is, 0.5 g of an insulating material sample is precisely weighed and extracted with tetrahydrofuran by a Soxhlet extractor for 18 hours. Next, this sample is dried in a dryer at 100 ° C. for 3 hours, allowed to cool to room temperature, and its mass is precisely weighed. Then, the gel fraction is measured from the mass percentage of the mass after the test to the mass before the test.
【００３２】以上のように、本実施例及び比較例１、比
較例２の各電線それぞれの加熱下における変形率及びゲ
ル分率は次の表２に示すようになった。As described above, the deformation rate and gel fraction under heating of each electric wire of this example and Comparative Examples 1 and 2 are shown in Table 2 below.
【００３３】[0033]
【表２】 [Table 2]
【００３４】この表２から、本実施例による電線の１２
０゜Ｃ〜１８０゜Ｃに加熱した際のそれぞれの変形率
は、架橋を施した比較例１の変形率に近い値となり、高
温下における変形が少なく、耐熱性に優れた電線を得る
ことができることが判った。From this Table 2, it can be seen that the electric wire according to the present embodiment is 12
The respective deformation rates when heated to 0 ° C. to 180 ° C. are close to the deformation rates of the cross-linked comparative example 1, and there is little deformation at high temperature, and an electric wire excellent in heat resistance can be obtained. I knew I could do it.
【００３５】[0035]
【発明の効果】以上のように、この発明の請求項１記載
の電線によると、芯線の周囲に被覆された絶縁材が、ポ
リメリック型可塑剤を含有したポリ塩化ビニル樹脂組成
物よりなるため、従来の架橋を施した電線と同様の耐熱
性を有する電線を、低コストで得ることができる。As described above, according to the electric wire according to claim 1 of the present invention, the insulating material coated around the core wire is made of the polyvinyl chloride resin composition containing the polymeric plasticizer. An electric wire having heat resistance similar to that of a conventional crosslinked electric wire can be obtained at low cost.
【００３６】また、請求項２記載のように、前記ポリ塩
化ビニル樹脂組成物が、ポリ塩化ビニル１００重量部に
対して、ポリメリック型可塑剤を３０〜５５重量部含有
したものであれば、より耐熱性に優れた電線を得ること
ができる。Further, as described in claim 2, if the polyvinyl chloride resin composition contains 30 to 55 parts by weight of a polymeric plasticizer with respect to 100 parts by weight of polyvinyl chloride, it is more preferable. An electric wire with excellent heat resistance can be obtained.
【００３７】また、請求項５記載のように、ポリ塩化ビ
ニル樹脂組成物に鉛安定剤以外の安定剤を含有すれば、
ポリエステル系可塑剤と鉛が共存した場合に生じるポリ
エステル系可塑剤の絶縁材表面への滲み出しという問題
がなくなる。When the polyvinyl chloride resin composition contains a stabilizer other than the lead stabilizer, as described in claim 5,
The problem of seeping of the polyester plasticizer onto the surface of the insulating material, which occurs when the polyester plasticizer and lead coexist, is eliminated.
【図１】この発明にかかる一実施形態の電線を示す断面
図である。FIG. 1 is a sectional view showing an electric wire of an embodiment according to the present invention.
【図２】同上の電線の製造行程を示す図である。FIG. 2 is a diagram showing a manufacturing process of the above electric wire.
１ 芯線 ２ 絶縁材 1 core wire 2 insulation
Claims (5)
メリック型可塑剤を含有したポリ塩化ビニル樹脂組成物
よりなることを特徴とする電線。1. An electric wire characterized in that the insulating material coated around the core wire is made of a polyvinyl chloride resin composition containing a polymeric plasticizer.
ニル１００重量部に対して前記ポリメリック型可塑剤を
３０〜５５重量部含有したものであることを特徴とする
請求項１記載の電線。2. The electric wire according to claim 1, wherein the polychlorinated resin composition contains 30 to 55 parts by weight of the polymeric plasticizer with respect to 100 parts by weight of polyvinyl chloride.
ル系可塑剤であることを特徴とする請求項１又は２記載
の電線。3. The electric wire according to claim 1, wherein the polymeric plasticizer is a polyester plasticizer.
ポリエステル系可塑剤、セバチン酸ポリエステル系可塑
剤又はフタル酸ポリエステル系可塑剤であることを特徴
とする請求項３記載の電線。4. The electric wire according to claim 3, wherein the polyester plasticizer is an adipic acid polyester plasticizer, a sebacic acid polyester plasticizer, or a phthalic acid polyester plasticizer.
剤以外の安定剤を含有していることを特徴とする請求項
３又は４記載の電線。5. The electric wire according to claim 3, wherein the polyvinyl chloride resin composition contains a stabilizer other than a lead stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7306028A JPH09147632A (en) | 1995-11-24 | 1995-11-24 | Electric wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7306028A JPH09147632A (en) | 1995-11-24 | 1995-11-24 | Electric wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09147632A true JPH09147632A (en) | 1997-06-06 |
Family
ID=17952212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7306028A Pending JPH09147632A (en) | 1995-11-24 | 1995-11-24 | Electric wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09147632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013040268A (en) * | 2011-08-12 | 2013-02-28 | Yazaki Energy System Corp | Vinyl chloride resin composition for thin wall wear resistant electric cable coating and thin wall wear resistant electric cable |
| US10366806B2 (en) | 2016-05-17 | 2019-07-30 | Yazaki Corporation | Vehicle electric wire and wire harness using the same |
-
1995
- 1995-11-24 JP JP7306028A patent/JPH09147632A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013040268A (en) * | 2011-08-12 | 2013-02-28 | Yazaki Energy System Corp | Vinyl chloride resin composition for thin wall wear resistant electric cable coating and thin wall wear resistant electric cable |
| US10366806B2 (en) | 2016-05-17 | 2019-07-30 | Yazaki Corporation | Vehicle electric wire and wire harness using the same |
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