Polybenzimidazole (PBI) is a high-performance engineering plastic with special properties such as outstanding thermal stability, strong chemical tolerance, and unusual compatibility with some other polymers.

PBI sheets and rods thus have a broad variety of possible uses including fields such as aerospace, automotive, petrochemical, semiconductor, glass, and coating.

PBI / Polybenzimidazole is really an expensive type of plastic but it is primarily used in irreplaceable fields or places with very strict requirements, regardless of costs.

PBI / Polybenzimidazoles and their derivatives are very expensive and difficult to manufacture but possess extraordinary properties.

In addition, the PBI shown above is one of the best performing engineering plastics on the market and provides one of any unfilled thermoplastic 's highest heat resistance and service temperature.

The stock shapes of PBI have a very high glass transition temperature of about 425 ° C (800 ° F), with no melting point, with a heat deflection temperature of about 815 ° F (435 ° C) at 264 psi (1.8 MPa). PBI rods and sheets also exhibit remarkable thermal tolerance and chemical resilience to alcohols, hydrocarbons, chlorinated solvents, hydrogen sulfide, heavy acids and bases, and many other chemical compounds. 

Since its beginning, was used in the defense industry, now the  PBI semifinished plastic shapes are used in products including semiconductors, plastics, petrochemicals, and many other areas.

Because PBI is often used after the copolymerization process followed after the post-dealing process. If PBI is used as the structural base for parts of the aircraft, electrical equipment, or other components, PBI resin is typically not obtained, but the PBI bulk mould.

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