造成橡胶直角形撕裂强度测试结果偏差的原因分析

Cause Analysis in Test Discrepancy of Rubber Angle Tear Strength

采用不同裁刀裁切3种胶料试样,并由不同操作人员测试其直角形撕裂强度。根据试验结果分析了造成直角形撕裂强度测试结果差异的主要原因:不同试验人员因测试习惯不同会造成测试结果的差异;裁刀顶角的曲率半径不同也会造成测试结果不同,使用顶角尖锐裁刀时测试数据偏小,反之测试数据偏大;不同胶料受不同裁刀影响的程度不同,抗撕性能好的受影响较小,抗撕性能差的受影响较大。

Three kinds of rubber were cut with three different dies to prepare various samples, and the right angle tear strengths of the samples were tested by different testers. The main reasons for the differences of right angle tear strengths are as follows： different testers and their different working custom result in different consequences. The different curve radius of die vertex angles will cause the different testing results as well. If the vertex angle of die is sharp, the testing result will be lower. On the contrary, if the vertex angle of the die is not sharp, the testing result will be higher. The different rubbers and dies will result in good tear resistance and bad ones.