30% Carbon Fiber Reinforced PEI Sheet

Glass fiber has greatly enhanced the bending strength and rigidity of PEI, improved the load-bearing capacity of PEI material at high temperatures, and maintained good electrical insulation even with the addition of glass fiber

Material:	30% glass fiber reinforced PEI
Color:	NATURE
MOQ:	1PCS
Packing:	boxes
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Quantity:



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Model:
PEI 2300
Brand:
PRES

Product Description

|ULTEM™ 30% Carbon Fiber Reinforced PEI Sheet | High Stiffness & Metal Replacement

ULTEM™ 30% Carbon Fiber Reinforced PEI is a high-performance composite that combines the inherent flame retardancy and thermal stability of polyetherimide with the exceptional stiffness, strength, and creep resistance of carbon fiber. It is engineered for structural applications where lightweight, high rigidity, and dimensional stability are critical.

Ultra-High Stiffness

Flexural modulus up to 12 GPa. Maintains shape under sustained load, ideal for precision structural parts.

High-Temp Structural Use

Continuous service at 170–180°C. Retains strength where unreinforced polymers soften.

️ UL94 V-0 & Low CTE

Inherent flame retardancy with ultra-low thermal expansion, ensuring tight-tolerance performance.

⚙️ Precision Machinable

Excellent for CNC machining of rigid, wear-resistant components—replacing aluminum and titanium in select uses.

✔️ Metal Replacement: Up to 60% weight reduction vs aluminum.
✔️ Creep Resistant: Stable under long-term mechanical stress.
✔️ Anisotropic Strength: Optimized fiber orientation for structural reliability.

| PEI+30%CF Sheet Applications & Use Cases

With its reinforced rigidity and thermal endurance, carbon fiber PEI is widely selected for structural and semi-structural components in advanced engineering fields.

✈️ Aerospace Structures

Interior Support Brackets: High stiffness at reduced weight.
Avionics Mounts: Dimensional stability under avionic heat loads.
Secondary Structural Panels: Flame-safe, rigid alternatives to light alloy.

Semiconductor & Precision Fixturing

Wafer Handling Arms: High rigidity and cleanroom compatibility.
High-Temp Test Fixtures: No creep during prolonged thermal cycling.
CNC Inspection Jigs: Maintains tolerance in metrology setups.

Industrial Automation

Robotic Arm Components: Lightweight, stiff, fatigue-resistant.
High-Speed Guide Blocks: Low wear, stable under dynamic load.
Structural Machine Frames: Replaces machined metal subassemblies.

️ Specialty Mobility & Racing

Chassis Brackets: Weight-saving with high structural integrity.
Under-Hood Supports: Withstands sustained high under-bonnet temps.
Mounting Plates: Minimal deflection under vibration and torque.

| PEI+30%CF Sheet Size Table

⚠️ Dimensional Tolerance for Machining
PEI+CF30 sheets are supplied with a slight positive thickness allowance to support precision CNC finishing. Contact us for exact measured specs.

*Common thickness: 3mm / 5mm / 6mm / 8mm / 10mm / 12mm. Max panel size up to 1000×2000mm. Custom cut available.

| PEI+30%CF Sheets Data Sheet

Technical Specifications (ULTEM™ PEI + 30% Carbon Fiber)
Property	Units	Test Method	Typical Value
Physical
Density	g/cm³	ASTM D792	1.38 – 1.42
Mechanical
Tensile Strength	MPa	ISO 527	190 – 210
Flexural Modulus	GPa	ISO 178	11 – 12
Flexural Strength	MPa	ISO 178	260 – 290
Hardness (Rockwell M)	–	ASTM D785	115+
Thermal
Glass Transition Temp (Tg)	°C	D3418	215 – 220
Continuous Use Temp	°C	–	170 – 180
Coefficient of Thermal Expansion	cm/cm/°C	ASTM D696	~2.0 × 10⁻⁵
Flammability	–	UL 94	V-0

| Frequently Asked Questions – PEI+30%CF Sheet

Q1: Is carbon fiber reinforced PEI electrically conductive?

Yes. The addition of carbon fiber makes the material slightly electrically conductive, especially along the fiber direction.

If your application requires high electrical insulation, unfilled ULTEM™ 1000 PEI is the recommended choice.

Q2: How does PEI+CF30 differ from standard PEI (ULTEM™ 1000)?

Rigidity: Flexural modulus increases from ~3.3 GPa (unfilled) to 11–12 GPa (CF30).
Thermal Expansion: CTE is significantly lower (~2.0 × 10⁻⁵ vs 5.6 × 10⁻⁵).
Application Focus: PEI+CF30 is designed for structural and load-bearing parts, while unfilled PEI is better for electrical and medical components.

Q3: Can PEI+30%CF replace aluminum or titanium?

In many non-safety-critical structural applications, yes. PEI+CF30 offers up to 60% weight reduction compared to aluminum, with excellent creep resistance and high-temperature stability. However, metal should still be used where extreme impact or fatigue strength is required.

Q4: Is custom thickness and zero-cut service available?