ISO 9073-4抗撕裂的测定
ISO9073-4测试针对的是梯形试样的抗撕裂强度的标准.该标准的测试是反映各类定制试样在连续撕裂情况下的抗撕裂能力.
本标准只适用无纺布材料.尽管无纺布归类于纺织产品,但它的技术特性却介于纺织产品和纸质产品以及塑料产品之间.
根据标准要求,测试用试样被裁剪成等要梯形,并且在短边裁一缺口.根据标准要求将梯形试样的非平行段夹入安置在 拉伸试验机 上的夹具内.测试的应用是用位移控制模式以恒定的速度将不断分离的夹具所受的撕裂力传递给夹具内的被测试样.测试的结果要求的是平均撕裂力值(用国际单位N表示).对于此试验,需要高速的数据采集及传输能力,建议使用500 Hz及以上的数据采集速率以便采集足够的数据量捕获所有的峰-谷值.
我们建议使用安装在拉伸试验机上的手动夹具或气动夹具配以橡胶面的夹面来夹持被测材料.试验设备可采用 单立柱 或 双立柱的台式试验机.测试用软件包推荐英斯特朗的Bluehill,它可以输入试样信息,设定控制模式,自动计算需要的结果数据以便产生标准要求的测试报告.对于此测试,我们使用预加载(Bluehill软件包含有此功能),该功能的作用是在测试开始前拉直可能松垂的试样.
我们建议用户在测试前仔细阅读ISO 9073-4标准之规定,充分了解测试所需要的一起要素诸如制具的选择和测试结果的要求
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