急問：UL62熱變形測試發(fā)現(xiàn)有開裂 - 無圖版
dannylee --- 2010-05-13 19:04:59
1
我司在測試一款無鹵TPE材料做的UL62電源線時，發(fā)現(xiàn)在熱變形實驗（150度）后，壓的位置附近有裂紋。熱變形本身數(shù)據(jù)是可以通過的，但是客戶說這種裂紋不能接受。查閱了UL標準，發(fā)現(xiàn)里面沒有提到裂紋的問題。不知道各位有沒有碰到類似問題，可否通過調(diào)整押線工藝來解決？
hhsheng --- 2010-05-13 20:56:55
2
斷裂伸長率低了 真正的TPE應該沒有這種現(xiàn)象的 以此類推 冷彎應該是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
從標準上看,有裂紋顯然是不能接受的!(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
可是這個說的是絕緣（insulation），不是護套（jacketing）啊
迷兒 --- 2014-05-31 01:53:55
6
是啊，同樓上疑問。請高手解釋下，絕緣有裂紋可以嗎？標準規(guī)定了嗎？
-- 結(jié)束 --