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热塑性塑料管材试验机拉伸GB/T 8804.1

作者：來源：发布日期： 2020.10.20

信息摘要：

热塑性塑料管材试验机拉伸GB/T 8804.1

热塑性塑料管材，包括各种PVC管材，其拉伸性能主要测试拉伸屈服应力、断裂伸长率，国标GB/T 8804.1-2003就是关于此的方法规定。拉力试验机用来完成测试要求，也是塑料管材企业必配试验设备。

測試原理是，沿著熱塑性塑料管材的縱向裁切或機械加工制取規定形狀和尺寸的試樣，通過拉力試驗機在規定條件下進行拉伸，測試得出性能參數。

試驗機需要配置引伸計，是自動記錄試樣的長度變化的一種儀表。

試樣的裁取，如圖所示：

試驗機的拉伸速度與管材的材質和壁厚有關，按産品標准或GB/T8804.2或GB/T8804.3的要求確定試驗速度。

試驗機的精度等級應達到1級以上。

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