针刺无纺布加工原理
Processing principle of needled nonwoven fabric
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 [1]  。基本原理是：
The production of nonwoven fabric by acupuncture is entirely through a mechanical action, that is, the puncture effect of the needle of the needle machine, and the strong [1] is obtained by holding the fluffy fiber reinforcement. The basic principle is:
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。针刺非织造工艺形式有预刺、主刺、花纹针刺、环式针刺和管式针刺等。
The triangle section (or other section) edge with barbed needles on web by repeated puncture. When hooks pass through the mesh, the surface of the mesh and the inner layer fibers are forced into the inner part of the mesh. Due to the friction between fibers, the originally fluffy web is compressed. When the needle is pulled out of the fiber network, the spiny fiber bundles are separated from the barb and remain in the fiber net, so that many fiber bundles are entangled in the fiber net so that it can not restore the original fluffy state. After many times of acupuncture, a considerable number of fiber bundles are inserted into the fiber net to bind the fibers in the fiber network to each other, thus forming a non woven material with a certain strength and thickness. Needle punched nonwoven technology includes pre thorns, main needles, pattern needles, ring needles and tube needles.