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Role of Fiber Finish in the Conversion of Fiber to Nonwovens — Part 1: Need for an Unconventional Method to Evaluate Finish Performance as a Mechanical Process Aid

The processing of fibers in a free, non-bound state gives rise to a range of frictional behavior for a given process. The basic laws of fiber friction are reviewed. The finish treatment to the fibers mainly act as a lubricant and anti static agent. A critical review of the requirements of the finish treatment and the methods used to evaluate fiber friction and static charge generation are presented. The requirements of the finish treatment with respect to carding and needlepunching are also discussed. The ineffectiveness of conventional methods to evaluate performance of finish in such process and the need to measure performance of finish and optimize it for each of these processes is highlighted. Methods to evaluate the finish performance in carding and needlepunching will be presented in Parts 2 and 3.