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几年来对环氧酚醛玻璃布板进行过几次热老化试验,试验方法是参考了本所1965年制定的评定单一绝缘材料——层压板耐热等级试验规程(草稿)。现将热老化试验总结于下: 一、1965年试验,采用益中绝缘材料厂1964年产品。 1.试验项目:平行击穿电压,垂直击穿强度,弯曲强度,抗劈强度。 2.试验温度:160℃,180℃,200℃,220℃。 3.试验结果:由于选取的试验温度过低(160℃下老化2400小时,180℃下老化1200小时,200℃下老化1000小时,220℃下老化840小时),性能均未下降至原始值的50％,甚至
Several years of epoxy phenolic glass cloth heat board several times the aging test, the test method is based on the reference made by the Institute in 1965 to assess a single insulation - laminate heat resistance test procedures (draft). Heat aging test is summarized below: First, the 1965 test, the benefits of insulation materials plant in 1964 products. 1. Test items: parallel breakdown voltage, vertical breakdown strength, bending strength, anti-splitting strength. 2. Test temperature: 160 ℃, 180 ℃, 200 ℃, 220 ℃. 3. Test Results: The performance did not decrease to the original values due to the selected test temperature being too low (2400 hours aging at 160 ° C, 1200 hours aging at 180 ° C, 1000 hours aging at 200 ° C, and 840 hours aging at 220 ° C) 50%, even