ULTEM CRS5311 – 30% Glass Reinforced Chemical Resistant PEI Resin with Enhanced Flow

ULTEM Resin CRS5311 is a 30% glass fiber reinforced, enhanced flow polyetherimide (PEI) copolymer manufactured by SABIC. As an authorized distributor and trader, we supply genuine SABIC materials with full traceability.

This grade is specifically engineered for applications requiring superior chemical resistance to strong acids, bases, aromatics, and ketones combined with the highest stiffness in the CRS series. It is a PFAS-free, amorphous, flame retardant PEI copolymer ideal for harsh chemical environments where standard engineering plastics may degrade.

ULTEM CRS5311 is the 30% glass fiber reinforced version in the CRS5000 chemical resistant series, offering the highest stiffness among the CRS family. The enhanced flow characteristics enable easier processing of complex parts, while the enhanced chemical resistance makes it an ideal alternative to polysulfone in chemically aggressive environments.

Key attributes include:

• 30% Glass Fiber Reinforcement – Provides the highest stiffness and dimensional stability in the CRS series; tensile modulus of 8,960 MPa

• Enhanced Flow – Improved flow characteristics (MFR 4 g/10min, MVR 7 cm³/10min) for easier processing and better mold filling

• Superior Chemical Resistance – Formulated to withstand strong acids, bases, aromatics, and ketones; retains structural integrity even under elevated temperatures

• High Heat Resistance – Glass transition temperature (Tg) of 225°C

• Inherent Flame Retardancy – UL94 V-0 (1.5mm) and 5VA (1.5mm) ratings

• High Stiffness & Strength – Tensile modulus of 8,960 MPa; tensile strength of 165 MPa

• Excellent Dimensional Stability – Low mold shrinkage of 0.20-0.40%

• Low Smoke & Toxicity – Inherently low smoke and toxicity; suitable for aerospace and mass transit applications

• Good Metal Adhesion – Suitable for applications requiring metal bonding

• Hydrolytic Stability – Good resistance to moisture and hydrolysis

• PFAS-Free – No PFAS intentionally added during manufacturing

• ECO Conforming – Meets environmental compliance standards

• Versatile Processing – Suitable for injection molding

Key Features of ULTEM CRS5311

• 30% Glass Fiber Reinforced – Provides the highest stiffness, strength, and dimensional stability in the CRS series; significantly improved rigidity compared to 10% and 20% glass reinforced grades

• Enhanced Flow – Improved flow characteristics (MFR 4 g/10min) for easier processing and better mold filling of complex parts

• Superior Chemical Resistance – Specifically formulated to resist strong acids, bases, aromatics, and ketones; an ideal alternative to polysulfone in chemically aggressive environments

• High Heat Resistance – Glass transition temperature of 225°C; UL RTI of 105°C

• Inherent Flame Retardancy – UL94 V-0 (1.5mm) and 5VA (1.5mm) ratings; ECO Conforming

• High Stiffness & Strength – Tensile modulus of 8,960 MPa; tensile strength of 165 MPa; flexural modulus of 8,200 MPa

• Excellent Dimensional Stability – Low mold shrinkage of 0.20-0.40%; low creep sensitivity

• Good Impact Resistance – Notched Izod impact of 96 J/m; unnotched Izod impact of 35 kJ/m²

• Low Smoke & Low Toxicity – Inherently low smoke and toxicity; suitable for aerospace, mass transit, and defense applications

• Good Metal Adhesion – Suitable for applications requiring metal bonding

• Amorphous Structure – Provides excellent dimensional stability across a broad temperature range

• PFAS-Free – No PFAS intentionally added during manufacturing

• Versatile Processing – Suitable for injection molding

CRS5000 Series Comparison

Typical Applications for ULTEM CRS5311

Typical Properties

Important Notes on Typical Data:

• Values listed are typical and sourced from SABIC official data sheets. They do not constitute binding product specification.

• Batch-to-batch deviations may exist. For critical applications, validate performance with batch-specific COA certificate.

• Final performance depends on processing conditions, mold design, and part geometry.

• SABIC official TDS shall serve as definitive technical reference. Request the latest official TDS from our sales team.

Processing Guidelines (Injection Molding)

Critical Processing Warnings:

• Drying: ULTEM CRS5311 is hygroscopic and must be dried to <0.02% moisture before processing. Dry at 150°C for 4-6 hours.

• Enhanced Flow: This grade offers enhanced flow characteristics (MFR 4 g/10min, MVR 7 cm³/10min) for easier processing and better mold filling of complex parts.

• Melt Temperature: Recommended melt temperature range is 365-390°C. Avoid excessive residence times to prevent thermal degradation.

• Mold Temperature: Higher mold temperatures (135-165°C) improve flow and reduce residual stress.

• Chemical Resistance: This grade is formulated for enhanced chemical resistance to strong acids, bases, aromatics, and ketones. Verify compatibility with specific chemicals in your application.

• PFAS-Free: This product does not contain PFAS intentionally added during manufacturing.

• Gate Design: Use large gates and runners to minimize flow resistance and reduce molded-in stress.

• Regrind: Regrind can be used up to 20-25% with virgin material, provided it is clean and properly dried.

Related Products

• Explore PEI / Polyetherimide – Browse all ULTEM PEI resin options

• Explore Engineering Plastics – Browse all engineering plastic materials

• About Our Company – Learn more about our supply capabilities and quality assurance

Technical Documents

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FAQ

Q1: What is ULTEM CRS5311 and what is it used for?
A: ULTEM CRS5311 is a 30% glass fiber reinforced polyetherimide (PEI) copolymer manufactured by SABIC with enhanced flow and superior chemical resistance to strong acids, bases, aromatics, and ketones. It offers the highest stiffness in the CRS series (tensile modulus 8,960 MPa) and is widely used in aerospace interiors, automotive under the hood, heavy truck, rail, defense, chemical processing, industrial, and electrical/electronic applications.

Q2: What is the difference between ULTEM CRS5201 and CRS5311?
A: CRS5311 contains 30% glass fiber reinforcement compared to 20% in CRS5201, providing higher stiffness (tensile modulus 8,960 MPa vs 6,890 MPa) and strength (165 MPa vs 131 MPa). CRS5311 also offers enhanced flow (MFR 4 g/10min vs 2.3 g/10min) for easier processing. Both grades share the same enhanced chemical resistance to strong acids, bases, aromatics, and ketones, and both have a Tg of 225°C.

Q3: What is the difference between ULTEM CRS5301 and CRS5311?
A: Both grades contain 30% glass fiber reinforcement. CRS5311 offers enhanced flow (MFR 4 g/10min vs 1.8 g/10min) for easier processing and better mold filling of complex parts. CRS5301 is a standard flow grade. Both share the same enhanced chemical resistance and a Tg of 225°C.

Q4: What is the glass transition temperature of ULTEM CRS5311?
A: The glass transition temperature (Tg) is 225°C.

Q5: What is the density of ULTEM CRS5311?
A: The density is 1.52 g/cm³ (1,520 kg/m³).

Q6: Is ULTEM CRS5311 flame retardant?
A: Yes. ULTEM CRS5311 is inherently flame retardant with UL94 V-0 (1.5mm) and 5VA (1.5mm) ratings.

Q7: Is ULTEM CRS5311 PFAS-free?
A: Yes. ULTEM CRS5311 has no PFAS intentionally added during manufacturing.

Q8: What is the melt flow rate of ULTEM CRS5311?
A: The Melt Flow Rate (MFR) is 4 g/10min at 337°C, 6.6kg; the Melt Volume Rate (MVR) is 7 cm³/10min at 360°C, 5kg.

Q9: What is the tensile strength of ULTEM CRS5311?
A: Tensile strength at break is 165 MPa (ASTM) / 160 MPa (ISO).

Q10: What is the tensile modulus of ULTEM CRS5311?
A: The tensile modulus is 8,960 MPa (ASTM) / 10,000 MPa (ISO).

Q11: What is the shrinkage of ULTEM CRS5311?
A: Mold shrinkage (flow) is 0.20-0.40% .

Q12: What is the glass fiber content of ULTEM CRS5311?
A: ULTEM CRS5311 contains 30% glass fiber reinforcement (by weight).

Q13: What processing methods can be used for ULTEM CRS5311?
A: ULTEM CRS5311 is processed by injection molding.

Q14: What is the UL RTI of ULTEM CRS5311?
A: The UL Relative Thermal Index (Elec/Imp/Str) is 105 / 105 / 105 °C.

Q15: What is the recommended drying condition for ULTEM CRS5311?
A: Dry at 150°C for 4-6 hours.

Q16: What is the melt temperature for injection molding ULTEM CRS5311?
A: Recommended melt temperature is 365-390°C.

Q17: What is the lead time for orders?
A: Regular orders ship within 7-10 working days after payment confirmation. Large-volume or urgent orders can be negotiated separately.

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Sample Policy:

• Samples are for laboratory validation tests only, not for production use.

• Buyer bears international sample-shipping freight.

• If bulk-product performance deviates from sample reference, SABIC official TDS serves as the authoritative benchmark.

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Disclaimer

DISCLAIMER: All technical data is referenced from original SABIC typical values for ULTEM CRS5311. Our company acts as authorized distributor/trader rather than original manufacturer. Final performance depends on processing conditions, mold design, and part geometry. Buyers shall independently validate product suitability for individual applications. Our firm bears no liability for product failure caused by improper processing or improper usage. Always reference the latest SABIC official TDS of ULTEM CRS5311 as the definitive specification.