Polymeric fiber webs with binder comprising salt of inorganic acid

摘要

Provided are nonwoven polymeric fiber webs using an improved curable composition. Such curable composition comprises an aldehyde or ketone and an amine salt of an inorganic acid. The composition when applied to polymeric fibers is cured to form a water-insoluble polymer binder which exhibits good adhesion and thermodimensional stability.

主权项

1. A process for binding polymeric fibers comprising:
forming an intermediate comprising an amine salt of an inorganic acid, wherein the inorganic acid comprises an oxygenated acid selected from the group consisting of phosphoric acid, pyrophosphoric acid, phosphorus acid, sulfuric acid, sulfurous acid, nitric acid, boric acid, hypochloric acid, and chlorate acid or a non-oxygenated acid selected from the group consisting of hydrochloric acid, hydrogen sulfide, and phosphine; forming a binder comprised of a reaction product of an aldehyde or ketone with the intermediate; applying the binder to fibers of a non-woven web of polymeric fibers; and curing the binder while present on the fibers.