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Duratron® PBI (Celazole® PBI) Polybenzimidazole

BEST MECHANICAL PROPERTIES TO 800°F (425°C)

- Highest heat deflection temperature 800°F (427°C), with a continuous service capability of 750°F (399°C) in inert environments, or 650°F (343°) in air with short term exposure potential to 1,000°F (538°C) - Highest mechanical properties of any plastic above 400°F (204°C)
 - Lowest coefficient of thermal expansion and highest compressive strength of all unfilled plastics
  

Duratron® PBI is the highest performance engineering thermoplastic available today. Duratron® PBI offers the highest heat resistance and mechanical property retention over 400°F of any unfilled plastic. Duratron® PBI has better wear resistance and load carrying capabilities at extreme temperatures than any other reinforced or unreinforced engineering plastic.

As an unreinforced material, Duratron® PBI is very "clean" in terms of ionic impurity and it does not outgas (except water). These characteristics make Duratron® PBI very attractive to semiconductor manufacturers for vacuum chamber applications. Duratron® PBI has excellent ultrasonic transparency which makes it an ideal choice for parts such as probe tip lenses in ultrasonic measuring equipment.
Duratron® PBI is also an excellent thermal insulator. Other plastics in melt do not stick to Duratron® PBI. These characteristics make Duratron® PBI ideal for contact seals and insulator bushings in plastic production and molding equipment.

Proven applications include:

  • High heat insulator bushings for hot runner manifolds
  • Electrical connectors for aircraft engines
  • Ball valve seats for high temperature fluid handling
  • Clamp rings for gas plasma etching equipment

ENGINEERING NOTES

Duratron® PBI is extremely hard and can be challenging to fabricate. Polycrystalline diamond tools are recommended when fabricating production quantities. Duratron® PBI tends to be notch sensitive. All corners should be radiused (0.040" min.) and edges chamfered to maximize part toughness. High tolerance fabricated components should be stored in sealed containers (usually polybags with desiccant) to avoid dimensional changes due to moisture absorption. Components rapidly exposed to temperatures above 400°F (205°C) should be "dried" prior to use or kept dry to avoid deformation from thermal shock.