Polyetherketoneketone nonwoven mats

摘要

The invention provides nonwoven mats comprising polyetherketoneketone fibers or mixtures thereof. Also provided are filters, textiles, blankets, and insulation prepared from polyetherketoneketone nonwoven mats, as well as methods for manufacturing the same.

主权项

1. A nonwoven mat consisting of first polyetherketoneketone fibers or mixtures thereof, wherein said first polyetherketoneketone has repeating units of isomer T represented by Formula I and a repeating unit of isomer I represented by Formula II:
-A-C(═O)—B—C(═O)—  I -A-C(═O)-D-C(═O)—  IIwhere A is a -Ph-O-Ph- group, Ph is a phenylene radical, B is p-phenylene, and D is m-phenylene, in a T:I isomer ratio of from 50:50 to 90:10, and wherein said first polyetherketoneketone is semi-crystalline having a crystallinity of from about 10% to about 40% as measured by DSC,
wherein said mixtures consist of said first polyetherketoneketone fibers and one or more second polyether ketoneketone fibers having a different T:I isomer ratio and/or different crystallinity from said first polyetherketoneketone fibers, and optionally one or more additives selected from the group consisting of pigments, processing aids, and stabilizers.