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技术常识

塑料硬度测量中的难题

来源:时代集团 发布日期:2019-03-07 09:57:51

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  硬度测量的方法很多,按照加载方式的不同可分为动载法和静载法两种,其中静载法较为常用。塑料硬度测量过去大都借用金属材料硬度测试方法,如布氏、洛氏、维氏、巴氏和肖氏等。这些方法的基本原理都是用一定直径得到的钢球或钢针压痕器,平稳地压入试样,卸载后用压痕面积或压痕深度或穿透能力来表针材料硬度的大小。但是塑料与金属材料不同,金属材料在硬度测试卸载后,压痕的恢复可以忽略不计,而塑料由于具有高根子材料的粘弹及松弛特征,其卸载后的弹性恢复是不可忽略的。因此,用金属硬度计众盈彩票注册测量塑料的硬度是不科学的,由此也就提出了塑料及其他高分子材料在载荷作用下直接测量压痕的硬度的测量方法。

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  时代TIME5430数显邵氏A型硬度计,具有测值准确,操作简单,携带方便,造型美观等优点。它适用于软塑料(如热塑性塑料、硬树脂、尼龙和有机玻璃等)、软橡胶及其它相关化工制品(如防腐材料、阻燃材料、油漆涂料等)的硬度测量。

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