Amorphous polyetherimide fiber and heat-resistant fabric
AssigneeKuraray Co., Ltd.
InventorsRyokei Endo, Yosuke Washitake, Yukie Hashimoto, Akihiro Uehata
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Abstract
Provided are an amorphous polyetherimide fiber having not only a small single fiber fineness suitable for producing fabrics, and a fabric comprising the amorphous polyetherimide fiber. The fiber comprises an amorphous polyetherimide polymer having a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, and a single fiber fineness of 3.0 dtex or less. The fiber may have a tenacity at room temperature of 2.0 cN/dtex or greater.
Claims17
An amorphous polyetherimide fiber comprising an amorphous polyetherimide polymer having a weight-average molecular weight (Mw) of about 1,000 to about 32,000 and a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, a single fiber fineness of 3.0 dtex or less, and a tenacity of the fiber at room temperature is 2.0 cN/dtex or greater, wherein the fiber is an undrawn melt spun fiber.
Dependencies are inferred from the claim text.