电线电缆网 > 国外线缆 > 急问：UL62热变形测试发现有开裂（完整版）
急问：UL62热变形测试发现有开裂 - 无图版
dannylee --- 2010-05-13 19:04:59
1
我司在测试一款无卤TPE材料做的UL62电源线时，发现在热变形实验（150度）后，压的位置附近有裂纹。热变形本身数据是可以通过的，但是客户说这种裂纹不能接受。查阅了UL标准，发现里面没有提到裂纹的问题。不知道各位有没有碰到类似问题，可否通过调整押线工艺来解决？
hhsheng --- 2010-05-13 20:56:55
2
断裂伸长率低了 真正的TPE应该没有这种现象的 以此类推 冷弯应该是NG的
moveitgogo --- 2010-05-14 08:46:25
3
5.1.8.1 PVC and TPE insulations
The insulation shall show no cracks when specimens of finished unjacketed cords and specimens of the
individual conductors from jacketed cords and types CXWTc, CXTWu, and TXc are exposed to a
temperature of 121 °C ± 2 °C for PVC or TPE rated at 60 °C, or 150 °C ± 2 °C for TPE rated in excess
of 60 °C for 1 h while wound six close turns around a mandrel having a diameter as shown in Table 43.
The specimen shall show no cracks when unwound from the mandrel after cooling to room temperature
The insulation shall show no cracks when specimens of finished unjacketed cords and specimens of the
individual conductors from jacketed cords and types CXWTc, CXTWu, and TXc are exposed to a
temperature of 121 °C ± 2 °C for PVC or TPE rated at 60 °C, or 150 °C ± 2 °C for TPE rated in excess
of 60 °C for 1 h while wound six close turns around a mandrel having a diameter as shown in Table 43.
The specimen shall show no cracks when unwound from the mandrel after cooling to room temperature
从标准上看,有裂纹显然是不能接受的!(The specimen shall show no cracks when unwound from the mandrel after cooling to room temperature)
Tianye --- 2010-05-14 08:49:05
4
不合格的
dannylee --- 2010-05-16 09:00:06
5
可是这个说的是绝缘（insulation），不是护套（jacketing）啊
迷儿 --- 2014-05-31 01:53:55
6
是啊，同楼上疑问。请高手解释下，绝缘有裂纹可以吗？标准规定了吗？