Needle punched non woven fabric is a type of nonwoven fabric that is produced by needle punching. This type of fabric has various qualities that make it an ideal choice for a variety of industrial applications. These characteristics include good acoustical and thermal insulation, dimensional stability, and good processing characteristics. Therefore, it is an excellent option for a wide range of applications in the textile industry, from filters to acoustic and thermal management lightweight solutions.
The fiber arrangements in a nonwoven fabric can affect the strength of the material. For instance, needle punched non woven fabric has higher bursting strength compared to thermally bonded fabric. The strength of needle punched non woven fabric increases with its GSM. The higher the GSM, the higher the bursting strength is.
The permeability of needle punched non woven fabric is determined by the fibre arrangement within the web. If the fibres are parallel, the fabric will have strong resistance in one direction and weak resistance in the other direction. Conversely, fibres that are randomly arranged will have equal strength in all directions. The fibre arrangement in needle punched non woven fabrics is influenced by the laying techniques.
The process of needlepunching involves repositioning the fibres vertically. The process uses thousands of needles to interlock the fibres and hold the structure together. These processes create a "binding point" where the fibre segments migrate from the surface of the web to the interior of the fabric. This binding point is a set of fibers of different orientations that are bonded together by friction forces.