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PEEK Material

Material

PEEK Material

PEEK pellets and PEEK profile
Polyetheretherketone Matrial is currently one of the most outstanding thermoplastic materials.
The melting point of all PEEK grades is 343°C, with a glass transition temperature (Tg) of 143°C and a continuous service temperature of 260°C — these backbone-driven thermal constants remain essentially the same regardless of formulation.

What does​ change is performance. Each PEEK grade contains different functional fillers — commonly unfilled, glass fiber reinforced, carbon fiber reinforced, or PTFE-filled — producing significant differences in mechanical strength, heat distortion temperature (HDT), dimensional stability, electrical properties and wear resistance. See the comparison below.

PEEK Material grades

Unfilled (Virgin)— Maximum ductility, purity and chemical resistance
Glass-filled (GF30) — ~3× stiffness, electrically insulating, cost-effective
Carbon-filled (CF30) — Highest stiffness, lowest thermal expansion, superior wear
Bearing grade — CF + graphite + PTFE, self-lubricating, highest PV limit
ESD Electrostatic dissipation grade—Designed specifically for anti-static protection
 

PEEK material Form

PEEK material in pellets form
PEEK Pellets — Virgin and reinforced granules (unfilled, GF30, CF30, ESD)
serve as the foundational feedstock for injection molding, extrusion, and 3D printing filament production.
With melt point 343°C and continuous service 260°C, they carry the base crystallinity required for all downstream stock shapes.
PEEK material in sheet form
PEEK sheets are flat semi-finished stock shapes supplied in standard panel dimensions  for CNC milling, waterjet cutting, and drilling into flat, planar components that demand high flexural rigidity and dimensional stability.
PEEK material in rods form
PEEK rods are solid cylindrical stock shapes, continuously extruded in diameters from Ø1 mm up to Ø250 mm with standard lengths of 1000 / 2000 / 3000 mm
They are purpose-built for CNC turning and milling into rotational, symmetrical, or axially-oriented precision components.
PEEK Material in 3d printing filaments form
PEEK 3D Printing Filaments — Ufilled &10% glass-fiber and 10% carbon-fiber reinforced filament grades extruded for FDM/FFF high-temperature additive manufacturing, delivering
complex geometry with PEEK's inherent thermal and chemical resistance.

How can PEEK material be processed?

PEEK material comes in various forms: granules, powders, sheets and rods, as well as 3D printing filaments. It can be processed in multiple ways:
  • PEEK  granules: Suitable for injection molding and extrusion. Using particles enables large-scale production. However, its melting point is as high as 343°C, and it has a high viscosity, which requires strict requirements for equipment and processing parameters. To learn how to use particle processing, please refer to our PEEK injection molding guide.
 
  • PEEK powder: The purity of PEEK powder is very high and it can be used for PEEK modified composites to achieve the desired performance. PEEK powder is also commonly used for spraying to achieve corrosion-resistant and wear-resistant surface properties. This type of processing method also requires that the equipment be capable of reaching the melting temperature of PEEK. The PEEK powder can also be used for SLS 3D printing, which requires highly skilled personnel and specialized equipment.
 
  • PEEK Sheet & rods: These products are suitable for machining and forming, are suitable for small-scale production, and can also achieve excellent product accuracy.
  • PEEK 3D Printing: The requirements for processing parameters and equipment in PEEK 3D Printing are also very high. The nozzles of ordinary printers cannot reach the melting point of PEEK. Moreover, the 3D-printed PEEK usually has insufficient crystallinity and requires annealing treatment. The PEEK components produced by 3D printing have low inter-layer bonding strength, and their performance is usually inferior to that of PEEK injection molding and PEEK machining. However, it offers the highest degree of design freedom among all processing methods, capable of manufacturing components with extremely complex internal structures, and has the smallest minimum order quantity.

PEEK processing method by form

PEEK form Processing Method Suitable
Pellets Injection molding / extrusion Medium and high quantity, complex parts
Powder Compounding / coating / SLS Modification, surface treatment, specific additive manufacturing
Sheet / Rod CNC machining Small and Medium batch, high precision
Filament FDM/FFF Complex structure, prototype, small quantity

PEEK material performance

PEEK material has excellent comprehensive performance，it exhibits a unique combination of the following key performance characteristics:
Chemical resistance

Chemical corrosion resistance

 insoluble in strong acids and strong bases (except concentrated sulfuric acid)
 
Low temperature resistance

Low temperature resistance

PEEK material can maintain Good mechanical properties  at -196 degrees
 
Radiation resistant

Radiation resistant

PEEK can still maintain properties
when  γ irradiation reaches
1100Mrad.
 
High strength

High strength

Metal-equivalent tensile and impact strength. Enables lightweight metal replacement.
Fatigue resistance

Fatigue resistance

Exceptional endurance under cyclic/vibration loading. Suited for high-frequency dynamic components.
Creep resistance

Creep resistance

Maintains dimensional integrity under prolonged static load at elevated heat. Critical for precision.
Wear-resistant

Wear-resistant

Excellent against abrasive/adhesive wear. Used in bearings, seals and bushings.
High temperature resistance

High temperature resistance

Withstands continuous service up to 260°C (Tg 143°C, melt 343°C). Ideal for extreme thermal environments.


 
oil-free self-lubricating

PEEK oil-free self-lubricating

Self-lubricating nature reduces friction coefficient. Enhances moving assemblies.
 
hydrolysis resistance

hydrolysis resistance of PEEK

In water at 120 ℃, PEEK can keep more than 90% strength  after 1000 hours,
 
dimensional stability

dimensional stability

PEEK has low molding shrinkage rate and coefficient of thermal expansion
 

Why choose PEEK Material from PRES?

We guarantee the basic performance of the standard grades, but we also have a variety of modified grades with filler ratios ranging from 10% to 40%. Our customization is highly advanced. We can custom the color, resistance value and size of the PEEK profile for you.
 
  • If this is your first time encountering PEEK materials, we have extensive experience and a variety of forms of PEEK materials. We can recommend the appropriate PEEK material grade and form based on your processing requirements, such as injection molding, extrusion, compression molding, spraying, 3D printing, and machining, to meet your diverse processing needs.
 
  • If you have been engaged in PEEK processing for many years and need to find a PEEK manufacturer with a faster delivery time, more stable performance or need to customize products to meet the needs of customers, PRES will try best to meet your requirements.
As a high-performance plastic supplier in China, PRES offers a range of high-performanceplastic products, including plastic pellets, plastic plates, plastic rods, plastic tubes, plastic powders, and high-performance 3D printing filaments.
Meanwhile, we provide mold design & manufacturing & injection molding services.

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