As a China-based PEEK material manufacturer, PRES supplies polyetheretherketone (PEEK) sheet and plate in four grades — unfilled, GF30, CF30 and ESD — from 770×1240 mm stock panels with grade-dependent thickness up to 150 mm (thicker made-to-order blanks available). Every panel is stress-relief annealed in-house for ≥98% flatness and ±0.05 mm/m dimensional stability, so your machined parts stay flat after cutting.
Content Menu
● Why PRES PEEK Sheets >> Grades at a Glance >> Which Grade to Choose >> Quick Selection Table >> Applications >> Detailed Data >> FAQ
Flatness is what separates one PEEK sheet supplier from another. Because PEEK is semi-crystalline, an unannealed or badly cooled panel carries locked-in stress that releases during machining — the part bows, the tolerance is lost, and your scrap rate climbs. PRES controls this at the mill: every panel is annealed and slow-cooled before it ships, giving you a stress-relieved blank that holds flatness and tight tolerances through roughing and finishing. For the engineering numbers behind this — HDT by grade, CLTE below and over Tg, thermal conductivity — see our PEEK sheet thermal performance page.
Controlled cycle at 250°C ± 5°C with slow cooling (≤10°C/hr) relieves internal stress before the panel ships. Guarantees ≥98% flatness and ±0.05 mm/m dimensional stability.
Reduces warpage risk by >70% and machining micro-cracks by >60% vs non-annealed stock. Engineered for high-precision semiconductor & aerospace components.
Achieves optimal crystallinity (38–42%) to boost flexural modulus and improve wear life by 20–30% under dry sliding conditions.
Match your primary performance requirement to the grade:
Maximum purity & FDA compliance → Unfilled PEEK sheet
Dimensional stability & structural rigidity → GF30 PEEK sheet
Wear resistance & thermal conductivity → CF30 PEEK sheet
Static-sensitive electronics assembly → ESD PEEK sheet
For a property-by-property trade-off across all five PEEK grades — including bearing grade — read the PEEK material selection guide, or contact our technical team for application-specific recommendations.
Commercial specifications at a glance — pick the grade, then jump to its full data page.
| Specification | Unfilled | GF30 | CF30 | ESD |
|---|---|---|---|---|
| Thickness (stock) | 1–150 mm | 6–150 mm | 6–150 mm | 6–150 mm |
| Max panel size | 770×1240 mm | 770×1240 mm | 770×1240 mm | 770×1240 mm |
| Color | Natural beige | Beige | Black | Black |
| Electrical behavior | Insulating | Insulating | Conductive | Static-dissipative |
| Wear resistance | Good | Improved | Exceptional | — |
| Machining | Easy | Moderate | Hard (abrasive) | — |
| FDA food contact | 21 CFR 177.2415 | — | — | — |
Typical commercial specifications. Mechanical and thermal figures — HDT, continuous service temperature, thermal conductivity, water absorption — are kept on the dedicated thermal performance page and in the selection guide to avoid duplication. Made-to-order blanks beyond stock thickness are available on request; lot-specific certified reports available upon request.
Leveraging the inherent flatness and dimensional stability of annealed PEEK sheets, PRES stock shapes are routinely machined into:
Wear Plates and Sliding Bases — Utilizing ≥98% flatness for linear motion systems in semiconductor equipment.
Seal Backing Plates and Gaskets — Chemical resistance + tight thickness tolerance (±0.20 mm) for fluid handling.
Structural Brackets and Insulating Plates — High flexural modulus (4.1–23 GPa) for aerospace secondary structures.
Precision Fixtures and Jigs — Annealed stability (±0.05 mm/m) ensures repeatable CNC fixture accuracy.
This page focuses on stock sizes, grades and ordering. For engineering depth, use:
PEEK sheet thermal performance — HDT by grade (152/315/336°C), CLTE below and over Tg, thermal conductivity, water absorption, and annealing & flatness practice.
PEEK material selection guide — full property tables for all five grades, including bearing grade.
What is PEEK material — polymer basics, Tg/Tm and the PEEK family overview.
PEEK rod — round rod stock from the same annealing line.
Q: What is the standard stock size and thickness of PRES PEEK sheets?
A: Standard panels are 770×1240 mm. Stock thickness: unfilled 1–150 mm, GF30/CF30 6–150 mm, ESD 6–150 mm. Thicker made-to-order blanks (unfilled up to 300 mm) are available on request.
Q: What is polyetheretherketone (PEEK) sheet used for?
A: Polyetheretherketone is a semi-crystalline high-temperature thermoplastic (melting point 343°C, glass transition 143°C, continuous service 260°C). In sheet form it is machined into wear plates, seal backing rings, insulating panels and precision fixtures — see the full introduction on our What is PEEK material page.
Q: Which grade is FDA-compliant for medical and food equipment?
A: Unfilled natural beige PEEK sheet, 1.30 g/cm3, compliant with 21 CFR 177.2415.
Q: What is the price of PEEK sheet? Is there a minimum order?
A: Pricing depends on grade, thickness and quantity. Small trial orders and stock cuts are welcome — see indicative figures in our PEEK price guide or request a quote with your sizes.
Q: Do you offer cut-to-size service and what tolerance can you hold?
A: Yes. Panels are CNC cut to your finished sizes with thickness tolerance as tight as ±0.20 mm; lead time depends on size and quantity — send your drawing for a schedule.
Q: Why are PRES PEEK sheets annealed at 250°C?
A: Stress-relief annealing at 250°C ±5°C with slow cooling (≤10°C/hr) removes the residual stress locked in during extrusion. Without it, machining releases that stress as warpage. Thicker panels go through extended or multi-cycle annealing.
Need PEEK Sheet Cut to Your Drawing?
Send your grade, thickness and finished sizes — our engineers reply with stock availability, cut-to-size tolerance and a quotation.
Request a Quote → 
