First U.S. Commercial PBI Fiber Production: 1983, Celanese Corporation

Current U.S. PBI Fiber Producers: PBI Performance Products, Inc.

Federal Trade Commission Definition for PBI Fiber: A manufactured fiber in which the fiberforming substance is a long-chain aromatic polymer having recurring imidazole groups as an integral part of the polymer chain. (Complete FTC Fiber Rules here.)

Basic Principles of PBI Fiber Production — PBI is prepared from tetra-aminobiphenyl and diphenyl isophthalate spun via a dry spinning process using dimethyl acetamide as the solvent.

PBI Fiber Characteristics

Major PBI Fiber Uses — PBI is suitable for high-performance protective apparel such as firemen's turnout coats and astronaut space suits and in applications where fire resistance is important.

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