纸 耐褶性的测定

[中文适用范围]： 指定使用 Köler-Molin、Lhomargy、MIT 和 Schopper 测试仪测定纸张耐折度的方法。这些方法的原理是将受到纵向应力的窄条纸以标准方式前后折叠，直至其断裂。Köler-Molin、Lhomargy 和 Schopper 方法适用于厚度不超过 0.25 毫米且抗拉强度大于 1.33 kN/m 的纸张。MIT 测试仪具有可互换的折叠头，可测量厚度范围高达 1.25 毫米的纸张。 [外文原描述]： Specifies the methods for the determination of folding endurance of paper using Köhler-Molin, Lhomargy, MIT and Schopper testers. The principle of the methods is folding backwards and forwards in a standardized manner of a narrow strip of paper subjected to a longitudinal stress, until it breaks. The Köhler-Molin, Lhomargy and Schopper methods are applicable to paper of thicknesses up to 0,25 mm thick and having a tensile strength greater than 1,33 kN/m. The MIT tester has interchangeable folding heads allowing a range of thicknesses up to 1,25 mm.