MELT SPUN POLYESTER NONWOVEN SHEET

摘要

This invention provides a process for making a nonwoven sheet of substantial ly continuous melt spun fibers by extruding melt spinnable polymer containing a t least 30 % by weight low IV poly(ethylene terephthalate), drawing the extrud ed fiber filaments at a rate of at least 6000 m/min, laying the fiber filaments down on a collection surface, and bonding the fiber filaments together to fo rm a nonwoven sheet. The invention further provides a nonwoven sheet comprised of at least 30 % by weight poly(ethylene terephthalate) having an intrinsic viscosity of less than 0.62 dl/g, where the sheet has a basis weight of less than 125 g/m2, and a grab tensile strength of at least 0.7 N/(g/m2).