Producing Nonwoven Fabrics by Melt Extrusion: An Introduction to Meltblown and Spunbond Processes

摘要

Nonwoven fabrics are produced by several different methods. The earliest fabrics were created from staple fibers, which were carded and formed into webs of loosely laid short fibers. The webs were stacked to give desired thickness by laying several layers onto a traveling belt, using a cross-lapping machine. The web was then fed into and through a needling machine which, by its up and down motion of specially designed needles, tacked the layers into a cohesive fabric. This method of producing nonwoven fabrics is still widely used today to produce heavy nonwovens.