用针刺法生产无纺布完全是通过一种机械作用，即针刺机的刺针穿刺作用，将蓬松的纤网加固抱合而得到强力。基本原理是：

With acupuncture non-woven entirely through a mechanical action, namely needle machine needle puncture, fiber net reinforced cohesion and fluffy strength. The basic principle is that:

利用三角截面(或其它截面)棱边带倒钩的刺针对纤网进行反复穿刺。倒钩穿过纤网时，将纤网表面和局部里层纤维强迫刺入纤网内部。由于纤维之间的摩擦作用，原来蓬松的纤网被压缩。刺针退出纤网时，刺入的纤维束脱离倒钩而留在纤网中，这样，许多纤维束纠缠住纤网使其不能再恢复原来的蓬松状态。经过许多次的针刺，相当多的纤维束被刺入纤网，使纤网中纤维互相缠结，从而形成具有一定强力和厚度的针刺法非织造材料。

The triangle section (or other section) edge with barbed needles on web by repeated puncture. When the barb passes through the web, the fiber surface and the inner layer fiber are forced to penetrate into the inner of the fiber mesh. Because of the friction between fibers, the bulky web was compressed. The exit from the web, piercing the fiber bundle from the barb in the web, so many bundles entangled fiber network so that it can not restore the original fluffy state. After many times of acupuncture, a considerable number of fiber bundle piercing fiber network, the fiber network in fiber entangled each other to form a certain strength and thickness of the needle punched nonwoven material.