Process for producing nonwoven fabric

摘要

Described herein are spunlaid fibers including at least one polymeric resin and at least one filler having an average particle size of less than or equal to about 5 microns and/or having a top cut of less than about 15 microns. The at least one filler may be present in an amount of less than about 40% by weight, relative to the total weight of the spunlaid fibers. Also described herein is a method for producing spunlaid fibers including adding calcium carbonate to at least one polymeric resin and extruding the resulting mixture. Further described herein are nonwoven fabrics including such spunlaid fibers, and methods for producing them.

主权项

1. A process for producing a nonwoven fabric comprising:
(a) mixing at least one polymeric resin with coated calcium carbonate having an average particle size of less than or equal to about 3 microns; (b) heating the mixture at least to the softening point of the at least one polymeric resin; (c) extruding the mixture to form fibers directly onto a foraminous surface to form a spunlaid web; and (d) bonding the spunlaid web to produce a nonwoven fabric; wherein the calcium carbonate is present in the nonwoven fabric in an amount less than about 40 wt %, relative to the total weight of the fabric.