PEEK

PEEK (Polyether ether ketone) is a strong, stiff plastic material that is often used in applications where performance at elevated temperatures is required. PEEK has outstanding chemical resistance as well as resistance to steam and hot water. It is a colourless organic polymer thermoplastic used in engineering applications. PEEK can easily be fabricated to any close tolerance.

PEEK (polyetheretherketone) is a high-performance engineering plastic with outstanding resistance to harsh chemicals, and excellent mechanical strength and dimensional stability. It offers hydrolysis resistance to steam, water, and sea water. PEEK has the ability to maintain stiffness at high temperatures and is suitable for continuous use at temperatures up to 338oF (170oC). This engineering plastic has a proven track record in challenging environments such as aerospace, oil and gas, and semiconductor.

PEEK IS WIDELY USED FOR:

  • Semiconductor machinery components
  • Aerospace parts
  • Bushings, bearings, seals, and back-up rings
  • Pump and valve components
  • Vacuum wand handles
  • Down hole electrical connectors
  • Medical instrument parts
  • Food processing machinery components
PROPERTY ASTM TEST PEEK UNFILLED PEEK 30% GLASS FILLED
PHYSICAL
Water Absorption, immersion 24 hours (%) D-570 0.5 0.11
MECHANICAL
Tensile Strength (psi) D-638 14,000 24,620
Flexural Modulus (psi) D-790 590,000 1,450,000
Izod impact, notched (ft-lbs/in of notch) D-256 1.6 1.84
THERMAL
Heat Deflection Temperature @ 264 psi (˚F) D-648 306 599
Maximum continuous service temperature in air (˚F) - 480 482
Coefficient of linear thermal expansion (x 10-5 in./in./°F) D-696 2.6 1.2

Some of PEEK's material properties:

  • Chemical resistance: PEEK displays high resistance amidst a wide range of chemical environments, even including high temperatures. It can only be dissolved in concentrated nitric acid or sulphuric acid.
  • Long life: It is a hard, stiff and strong polymer. It displays good friction as well as wear properties.
  • Hydrolysis resistance: PEEK material can be exposed for a long period of time tohigh pressure water and steam without exhibiting any serious degradation.
  • High temperature resistance: When the process temperatures go beyond the limit of what conventional plastic materials can withstand, it is advisable to go for PEEK.

KEY PROPERTIES

  • High abrasion resistance
  • Low moisture absorption
  • Outstanding chemical resistance
  • Low coefficient of friction
  • Excellent wear characteristics
  • Machinability

ADVANTAGES

  • Excellent chemical resistance
  • Very low moisture absorption
  • Good wear and abrasion resistance
  • Unaffected by continuous exposure to hot water or steam
  • Good radiation resistance
  • Excellent flexural, impact, and tensile characteristics
  • High strength alternative to fluoropolymers
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