Studies on the Characterization of the Needle Punching Laminated Nonwovens(I) - Fabric Structure and Pore Characteristics -

니들펀칭 라미네이팅 부직포의 특성화 연구(I) -포구조와 기공특성-

The purpose of this study was to investigate the fabric structure and pore size distribution of the needle punching laminated nonwovens (NPLN) produced by changing the number of layers and punching density. The morphological structure and pore characteristics of NPLN fabrics were tested and the results obtained are as follows: The morphological structure of NPLN fabrics showed that the barb needles could penetrate perfectly up to 4 single layers of 125 g/$m^2$ fabric weight. However, the needle did not completely penetrate above 400 punches/$\textrm{cm}^2$ punching density. The maximum and mean pore diameters decreased with increasing number of layers, while the mean pore diameter of NPLN decreased as the punching density increases up to 300 punches/$\textrm{cm}^2$ with 2 layers or 3 layers and then increased slightly above this. The minimum pore diameter of NPLN did not vary significantly with the processing variables studied.