JP2005344060A5

JP2005344060A5 -

Info

Publication number: JP2005344060A5
Application number: JP2004167433A
Authority: JP
Filing date: 2004-06-04
Publication date: 2007-07-12
Anticipated expiration: 2024-06-04

Description

評価方法は以下の通りである。
（機械的強度）
ＵＬ７５８．１４に準拠して、引張破断強度と引張破断伸びを評価した。合否の基準としては、引張破断強度が１０ＭＰａ以上、引張破断伸びが１５０％以上のものを合格と判定した。
（耐熱性）
ＵＬ７５８．１４の耐熱試験（定格１２５℃、及び、定格１５０℃）を参照した。１５８℃（定格１２５℃）、及び、１８０℃（定格１５０℃）に設定したギアオーブンに投入して、７日おきに取り出して引張破断伸びを測定し、老化後の引張破断伸びが５０％以上保持できる日数を計測した。合否の基準としては、定格１２５℃については３５日以上、定格１５０℃については２１日以上のものを合格と判定した。
（耐電圧特性）
水中での絶縁破壊電圧にて評価した。印加交流電圧を増加させてゆき、絶縁破壊した時の電圧を測定した。試料数ｎ＝１０で測定し、その平均値を算出した。合否の基準としては、絶縁破壊電圧が１０ｋＶ以上のものを合格と判定した。
（難燃性）
ＵＬ７５８．３９（水平燃焼試験）、ＵＬ７５８．４１（ＶＷ−１燃焼試験）にて評価した。
（可撓性）
図１（Ａ）に示すように、長さ５００ｍｍの電線１を試料とし、その中心ｃから左右５０ｍｍの距離に標線ｓ，ｓ’を引き、電線１の両端１０ｍｍだけ被覆１ａを剥ぎ取り、導体１ｂを露出させる。次いで、図１（Ｂ）に示すように、導体１ｂの端を平行に揃えて結束し、直径２．０φのマンドレル３に電線１の中心ｃが配置されるようにして吊り下げ、重り２により導体１ｂの結束部分に０．９８Ｎ（１００ｇ）の荷重をかける。そして、荷重をかけてから、１分後の標線ｓと標線ｓ’の標線間距離Ｌを測定する。評価の基準としては、標線間距離Ｌが５ｍｍ未満のものを特に柔らかい、５〜１０ｍｍのものを柔らかい、１０ｍｍ以上のものを硬いと判定した。又、表中においては、５ｍｍ未満のものを◎、５〜１０ｍｍのものを○、１０ｍｍ以上のものを△、と示した。 The evaluation method is as follows.
(Mechanical strength)
Based on UL758.14, the tensile strength at break and the tensile elongation at break were evaluated. As a pass / fail criterion, a sample having a tensile strength at break of 10 MPa or more and a tensile elongation at break of 150% or more was determined to be acceptable.
(Heat-resistant)
Reference was made to the heat resistance test (rated at 125 ° C. and rated at 150 ° C.) of UL758.14. It is put into a gear oven set at 158 ° C (rated 125 ° C) and 180 ° C (rated 150 ° C), taken out every 7 days, and measured for tensile breaking elongation. Tensile breaking elongation after aging is 50% or more The number of days that can be retained was measured. As a pass / fail standard, a rating of 125 ° C. was determined to be 35 days or more, and a rating of 150 ° C. was determined to be 21 days or more.
(Withstand voltage characteristics)
The dielectric breakdown voltage in water was used for evaluation. The applied AC voltage was increased, and the voltage at the time of dielectric breakdown was measured. Measurement was performed with the number of samples n = 10, and the average value was calculated. As a pass / fail criterion, a product having a dielectric breakdown voltage of 10 kV or higher was determined to be acceptable.
(Flame retardance)
Evaluation was performed using UL758.39 (horizontal combustion test) and UL758.41 (VW-1 combustion test).
(Flexibility)
As shown in FIG. 1 (A), the wire 1 having a length of 500 mm is used as a sample, the marked lines s and s ′ are drawn at a distance of 50 mm on the left and right from the center c, and the covering 1a is stripped off at both ends 10 mm of the wire 1 The conductor 1b is exposed. Next, as shown in FIG. 1 (B), the ends of the conductors 1b are aligned and bundled, and suspended so that the center c of the electric wire 1 is placed on the mandrel 3 having a diameter of 2.0φ. A load of 0.98 N (100 g) is applied to the bound portion of the conductor 1b. Then, after applying the load, the distance L between the marked lines s and s ′ after one minute is measured. As a criterion for evaluation, it was determined that the distance L between the marked lines was less than 5 mm, especially soft, 5-10 mm soft, and 10 mm or more hard. Moreover, in the table | surfaces, the thing below 5 mm was shown as (double-circle), the thing 5-10 mm (circle), and the thing 10 mm or more were shown as (triangle | delta).