The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么纸张边缘容易割伤手？
简单的摘要：纸张边缘容易割伤手的原因主要是边缘锋利且强度高、表面光滑减少摩擦力以及纸张的纤维结构。
1、边缘锋利且强度高：纸张边缘在切割或撕裂过程中会形成非常薄的刃口，虽然材料本身较软，但边缘锋利且强度相对较高，容易切入皮肤造成割伤。
2、表面光滑减少摩擦力：纸张表面通常较为光滑，摩擦系数低，当手部与纸张边缘接触时，难以形成有效的摩擦缓冲，使得边缘更容易划破皮肤。
3、纸张的纤维结构：纸张由植物纤维交织而成，边缘处的纤维可能松散或翘起，形成微观的锯齿状结构，增加了割伤的可能性。
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