JP6319055B2 - 電線被覆材用組成物および絶縁電線 - Google Patents
電線被覆材用組成物および絶縁電線 Download PDFInfo
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Description
(電線被覆材用組成物の調製)
表1に示すように、ポリ塩化ビニル(重合度1300)100質量部、トリメリット酸エステル25質量部、エーテル系熱可塑性ポリウレタンエラストマー(ショア硬度A75)5質量部、非鉛系熱安定剤5質量部を、単軸押出機を用いて180℃で混合し、ペレタイザーにてペレット状に成形して、ポリ塩化ビニルを含有する電線被覆材用組成物を調製した。
調製した電線被覆材用組成物を、断面積0.5mm2の撚線導体の周囲に被覆厚0.2mmで押出成形することにより絶縁電線を作製した。
エーテル系熱可塑性ポリウレタンエラストマー(ショア硬度A75)の配合量を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
熱可塑性ポリウレタンエラストマーの種類を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
ポリ塩化ビニルの種類を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
トリメリット酸エステルの配合量を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
可塑剤の種類を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
さらに添加剤を追加した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
熱可塑性ポリウレタンエラストマーを配合しなかった以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
熱可塑性ポリウレタンエラストマーの配合量を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
熱可塑性ポリウレタンエラストマーに代えて低温改質剤(10質量部)を配合した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
トリメリット酸エステルの配合量を変更した以外は実施例1と同様にして、電線被覆材用組成物を調製し、絶縁電線を作製した。
・ポリ塩化ビニル
(重合度1300):「新第一塩ビ(株)、ZEST1300Z」
(重合度2500):「新第一塩ビ(株)、ZEST2500Z」
・可塑剤
フタル酸エステル:「(株)ジェイ・プラス、DUP」
トリメリット酸エステル:「DIC(株)、W−750」
ピロメリット酸エステル:「DIC(株)、W−7010」
アジピン酸エステル:「DIC(株)、W−242」
セバシン酸エステル:「DIC(株)、W−280」
・熱可塑性ポリウレタンエラストマー
エーテル系、ショア硬度A73:「BASFジャパン、エラストランC70A10WN」
エーテル系、ショア硬度A75:「DICバイエルンポリマー、パンデックスT−8175」
エーテル系、ショア硬度A85:「BASFジャパン、エラストランET385」
エステル系、ショア硬度A77:「大日精化、レザミンP−1275」
・加工助剤(塩素化ポリエチレン):「昭和電工、エラスレン301A」
・低温改質剤(MBS):「カネカ、カネエースB−564」
・増量剤(炭酸カルシウム):「白石カルシウム、白艶華CCR」
・非鉛系熱安定剤:「ADEKA、RUP−100」
作製した絶縁電線について、下記評価方法に基づいて、耐外傷性、低温屈曲性、耐引き裂き性を評価した。
<耐外傷性評価>
作製した絶縁電線を300mmの長さに切り出して試験片とした。図2(a)(平面図)、図2(b)(側面図)に示すように、試験片1をプラスチック板2a,2b上に設置した。プラスチック板2aとプラスチック板2bの間隔は5mmとした。試験片1の左端をプラスチック板2bに固定し、試験片1の右端に30Nの張力をかけて、試験片1をまっすぐにした。次いで、試験片1において、プラスチック板2aとプラスチック板2bの間に配置された部分の下部から1cm、試験片1の径方向中央から外周側に0.8mm程度離した位置に、厚みが0.5mmの金属片3を配置した。
作製した絶縁電線を350mmの長さに切り出して試験片とした。この試験片の両端20mmの被覆材を剥ぎ取った。次いで、図4に示すように、試験片6の一端を回動アームに固定し、その他端におもり7をつるし、試験片6の長手方向中間部を一対の円柱状部材8a、8b(半径r=25mm)で挟みこんだ状態で、試験片6が円柱状部材8a、8bの周面に沿うように、一方向に90度、他方向に90度、回動アームを回動させて、曲げ半径rで試験片6を繰返し屈曲させることにより行なった。試験片6にかかる荷重を400g、試験温度−30℃、屈曲動作の繰返し速度は1分間に60往復とした。屈曲試験によって試験片6が断線するまでの屈曲回数(往復回数)をもって屈曲性を評価した。屈曲回数2000回以上を合格「○」とし、3000回以上を特に優れる「◎」とした。
調製した電線被覆材用組成物から作製した1mm厚シートから、JIS K 6252記載のアングル型試験片を作製し、引張試験機を用いて、耐引裂き性を評価した。掴み具間距離を20mm、引張速度を50mm/min.にて実施し、ストロークが10mm(みかけひずみ50%)以上で試験片が破断した場合に、耐引裂き性を合格「○」とし、さらに、20mm(みかけひずみ100%)以上で試験片が破断した場合に、耐引裂き性により優れる「◎」とした。一方、10mm未満で試験片が破断した場合に、耐引裂き性を不合格「×」とした。
12 導体
14 絶縁被覆層
Claims (5)
- ポリ塩化ビニルを含有する電線被覆材用組成物において、
前記ポリ塩化ビニル100質量部に対し、可塑剤を15〜30質量部、熱可塑性ポリウレタンエラストマーを0.1〜5質量部含有することを特徴とする電線被覆材用組成物。 - 前記熱可塑性ポリウレタンエラストマーのソフトセグメントが、ポリエーテル鎖からなることを特徴とする請求項1に記載の電線被覆材用組成物。
- 前記熱可塑性ポリウレタンエラストマーのショア硬度が、A75〜A85の範囲内にあることを特徴とする請求項1または2に記載の電線被覆材用組成物。
- 前記可塑剤が、フタル酸エステル、トリメリット酸エステル、ピロメリット酸エステル、アジピン酸エステル、セバシン酸エステルのいずれか1種または2種以上であることを特徴とする請求項1から3のいずれか1項に記載の電線被覆材用組成物。
- 請求項1から4のいずれか1項に記載の電線被覆材用組成物を電線被覆材に用いたことを特徴とする絶縁電線。
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DE112015005107.4T DE112015005107B4 (de) | 2014-11-11 | 2015-10-21 | Polyvinylchloridhaltiges leitungsbeschichtungsmaterial und isolierte elektrische leitung |
PCT/JP2015/079633 WO2016076085A1 (ja) | 2014-11-11 | 2015-10-21 | 電線被覆材用組成物および絶縁電線 |
CN201580059886.XA CN107148655A (zh) | 2014-11-11 | 2015-10-21 | 电线包覆材料用组合物及绝缘电线 |
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