Abstract
As the needle has barbs which entangle fibers in a web, the punched fabric is made by punching the random web. Compared with non-woven fabric, it has some defects such as shedding of fiber and punched holes.
The needle punching machine was designed under the following considerations:
As the web must not be moved during punching, the timing of feed and punch actions is important. Punch holes need to be distributed evenly and each second rank needle is better to be set at the center of the interval to the neighbouring first rank needles, and the third needle at the center of the interval between the first and the second ranks and so on.
The needle is to be selected by the kind and fineness of fibers, the thickness and density of the web, etc.
