Choosing between ESD PEEK sheet and ESD PEI sheet is one of the most common high-stakes material decisions for industrial buyers, CNC machining shops and wholesale distributors. Both are high-end anti-static engineering plastic sheets commonly used in electronics manufacturing, semiconductor equipment, precision automation and cleanroom component manufacturing. However, the varying temperature tolerance, mechanical stability, CNC machinability, chemical tolerance and cost have a significant effect on the quality of the part, production efficiency and long-term operational reliability.
We are a professional supplier of industrial plastic sheet, we can supply full-spec ESD PEEK sheet (6-40mm, 600*1000mm), including natural PEEK sheet and glass-filled PEEK sheet and ESD PEI Sheet (5-80mm, 610*1220mm) in standard and glass-reinforced grades. CNC processors and factory procurement teams can use this guide to understand the core differences and select the ideal ESD plastic sheet for mass production and custom precision machining projects.
Overview of Core Material and Standard Specifications
Before comparing performance, it is critical to clarify the standard sizes and grades available for industrial wholesale and CNC fabrication. This has a direct effect on inventory planning and cutting yield for manufacturers.
ESD PEEK Plastic Sheet Technical Data
Available Thickness: 6mm-40mm;
Standard sheet size: 600*1000mm;
Optional grades: Natural PEEK sheet, Glass filled PEEK sheet, Anti static PEEK sheet.
Surface resistivity: 10^7–10^10 Ω/sq, meeting industry ESD protection standards.
ESD PEEK Plastic Sheet maintains PEEK’s legendary high-performance base properties, with stable anti-static modification, to avoid static buildup on precision parts, ideal for high-end electronic and semiconductor applications.
ESD PEI Plastic Sheet Technical Data
thickness: from 5mm to 80mm;
Standard sheet size: 610mm*1220mm;
Optional grades: Natural amber Clear PEI sheet, Glass-filled PEI sheet, Anti Static PEI sheet.
Surface resistivity: Static dissipative for standard industrial ESD range.
ESD PEI Plastic Sheet features excellent dimensional stability and machining cost, and is a reliable anti-static material for general medium and high level precision industrial components.
Key Performance Variances Critical for CNC & Industrial Applications
The performance gaps are the key drivers that lead factory procurement and CNC machining shops to select one material over another. All the metrics are focused on stability in mass production, accuracy in machining and adaptability to harsh environments.
1. Resistance to high temperatures
ESD PEEK Sheet: Excellent thermal resistance, continuous use temperature up to 250°C. It has stable mechanical and antistatic performance under long-term high temperature working condition, and it is resistant to thermal deformation and aging. This makes it ideal for high heat generation equipment, baking fixtures and aerospace precision parts.
ESD PEI Sheet: Withstands continuous use up to 170 °C. It is good for most industrial situations from heat resistance but not for extreme high-temperature environments such as ESD PEEK sheet. ESD PEI is fully capable for conventional electronic jigs & room temperature precision parts.
2. Mechanical Strength & Structure Stability
ESD PEEK sheet shows higher tensile strength, flexural strength and creep resistance. It is characterized by high load capacity, long-term vibration and repetitive mechanical stress and low deformation after CNC high-precision milling, drilling and turning. Glass filled PEEK sheet provides additional stiffness and wear resistance for heavy duty structural components.
ESD PEI sheet is moderately tough and rigid mechanically. It is more flexible than PEEK and less susceptible to brittle cracking when machining thin walls. ESD PEI is used for medium-load precision parts and decorative functional components with stable structural performance and less material waste.
3. Chemical and Resistance to Corrosion
ESD PEEK sheet has improved chemical tolerance than ESD PEI sheet. It is resistant to most industrial solvents, acids and alkalis and lubricants, so it is the first choice for chemical processing equipment parts, cleaning fixtures and industrial components exposed to corrosive media.
ESD PEI sheet is stable to chemicals in the daily industrial environments. However, it is vulnerable to strong corrosive chemicals and long-term solvent immersion, which limits its applications in harsh chemical working condition.
4. CNC Machinability and Yield Rate
ESD PEI Sheet: More compatible with CNC machining. It has lower machining hardness, smoother cut surfaces, less tool wear and higher yield of finished product. Excellent processability shortens processing cycles and reduces production costs for batch customized parts, which is favored by most CNC machining factories.
ESD PEEK Sheet: The harder material leads to faster tool wear and higher demands on the machining parameters. Precision processing needs professional equipment and mature technology, but the accuracy of the final product and long-term stability are higher, suitable for high standard precision parts with zero error requirements.
5. ESD Stability & Lifetime
Both materials can reach the standard anti-static effect, but ESD Polyetheretherketone Sheet (ESD PEEK Sheet) adopts more stable integral anti-static modification. Its static dissipating performance is long-lasting, and not easy to fail after long-term machining, friction and high temperature use.
ESD Polyetherimide Sheet (ESD PEI Sheet) is mainly based on blending or surface anti-static treatment. If using amber-transparent PEI board with an anti-static coating, due to long-term use and repeated processing, its ESD performance may slightly decay, which can meet the requirements of conventional industrial static protection, but can not meet the requirements of ultra-high-standard semiconductor-grade. This does not happen with blending opaque black PEI antistatic sheets.
Buyers’ Guide to Choosing an Application Scenario
In order to help wholesale buyers & factory procurement to make decision quickly, we summarize the most suitable application scenarios for the two ESD plastic sheets:
Select ESD PEEK Plate (6-40mm, 600*1000mm) If You Need:
Ultra-high temperature resistant precision parts (long term operation 170°C+).
Semiconductor, Medical Equipment, Aerospace High-precision Components.
Parts exposed to chemical solvents, lubricants and corrosive conditions.
Structural parts for high-vibration, heavy-load applications that need long-term stability.
PEEK sheet with glass filling for better wear resistance and rigidity.
Select ESD PEI Sheet (5-80mm, 610*1220mm) If You Need:
Cost effective anti-static precision jigs, fixtures and tool parts
Automation Auxiliary Parts, Electronic Assembly Equipment, Cleanroom Components.
Batch CNC machining project with high yield and low processing cost.
Customized processing of thick plates with ultra-thick specifications (up to 80mm).
Glass filled PEI sheet for a lower budget, better structural rigidity.
Advantages of Wholesale & Procurement
We are direct factory supplier of full size ESD PEEK sheet, natural PEEK sheet, glass filled PEEK sheet and ESD PEI sheet, amber PEI sheet, glass filled PEI sheet. All sheets are factory direct, with stable stock, supporting bulk wholesale, custom CNC cutting and Customized thickness processing.
We have strict control over the material ESD stability, flatness, and machining performance, so each batch of sheets can meet the industrial precision production standards. We support long term cooperative supply for CNC processing companies and industrial distributors and fast delivery to reduce your procurement and production costs.
ESD PEEK sheet is the premium choice for extreme working conditions, high precision and long life industrial parts. ESD PEI sheet is the cost effective, high yield solution for conventional anti-static precision machining and electronic industrial applications. For procurement teams and CNC manufacturers, the key to balancing product quality and production cost is matching the right material to the working scenario.
Are you in need of dependable suppliers of wholesale ESD PEEK sheet and ESD PEI sheet? Contact us today for samples, current bulk pricing and CNC processing technical support!
AHD ESD PEI Sheet, some called Anti Static Ultem PEI Sheet
Q1: What’s the difference between ESD PEEK sheet and ESD PEI sheet?
ESD PEEK has better temperature resistance, chemical stability and longer ESD life span; ESD PEI sheet has better CNC machinability, higher yield rates and more cost-effective industrial performance for standard anti-static applications.
Q2: Which is better for CNC machining, ESD PEEK or ESD PEI?
A: ESD PEI sheet is more CNC-friendly with smoother cutting, less tool wear and lower processing cost. ESD PEEK is more difficult to machine, but it provides higher precision and stability for critical high-end parts.
Q3: Does ESD PEEK sheet have higher heat resistance than ESD PEI sheet?
A: Yes. ESD PEEK can be used continuously at 250°C, making it perfect for high temperature applications. ESD PEI works steadily up to 170°C for the production of normal precision fixtures and electronic components.
Q4: Which one should I wholesale industrial antistatic parts?
A: For semiconductor, medical and high heat resistant parts, choose ESD PEEK. Choose ESD PEI for low-cost, high-yield CNC batch production, automation jigs and general ESD industrial parts.
