Patent ID: 9139940
Filing Date: 2015-09-22
Classification: D04H,Y10T

Abstract:
1. A method for making a bonded nonwoven fibrous web comprising: 1) providing a nonwoven fibrous web that comprises oriented monocomponent fibers selected from the group consisting of nylon fibers, polypropylene fibers, polyethylene fibers, and polyethylene terephthalate fibers, the fibers exhibiting a Differential Scanning Calorimetry (DSC) scan having an exothermic crystal-perfection peak in a non-reversing heat flow plot, and a basic melting point appearing as a single endothermic peak in a total heat flow plot, and further exhibiting a Nominal Melting Point as defined herein with the proviso that for nylon fibers the Nominal Melting Point be determined from a first-heat total-heat-flow plot, further wherein the crystal-perfection peak shows: 2) subjecting the web to a controlled heating and quenching operation that includes: