Generally, the strength and elongation at break are tested. The clamps that can be used are sawtooth type, slab type (or wave type), and wound type. Among them: The sawtooth type is flat type, suitable for the detection of cloth with small thickness, which can simultaneously detect the strength and elongation at break; the slab type (or wave type) is flat type, which is suitable for the detection of cloth with large thickness. At the same time, the strength and elongation at break are detected; the two are clamped by external force, and the disadvantage is that the clamping portion is easily damaged and the fracture is at the jaw. The winding type is biaxial type, suitable for cloth type detection with large force value. It can only detect the strong force, and the elongation at break needs auxiliary measurement. This test is to generate pressure by laminating the lower layer, and the other two layers are moving in opposite directions. Friction is generated to prevent the sample from slipping, which avoids damage to the clamping portion.
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