Polyetherimide (PEI)

Description

1. Product Overview
   Polyetherimide (PEI) is a high-performance, amorphous engineering thermoplastic belonging to the polyimide family, engineered for extreme thermal, mechanical, and chemical stability. It is widely used in advanced industrial applications requiring long-term structural integrity under high heat and mechanical stress, including aerospace, automotive, electronics, and medical devices. The key value proposition of PEI lies in its exceptional balance of high heat resistance, flame retardancy, dimensional stability, and electrical insulation performance. Strategically, it is a critical material in high-value manufacturing sectors transitioning toward lightweight, high-strength, and high-efficiency polymer solutions.
2. Key Specifications & Technical Characteristics

• Chemical composition: Aromatic polyetherimide polymer (based on bisphenol-A dianhydride and m-phenylenediamine derivatives)
• Purity level / grade: Industrial / optical / reinforced injection molding grades available (≥99% polymer content typical)
• Physical form: Amber to transparent pellets, granules, or powder
• Density: ~1.27 g/cm³
• Glass transition temperature (Tg): ~217°C
• Continuous service temperature: Up to ~170°C (depending on grade)
• Flame retardancy: UL94 V-0 inherent without additives
• Packaging options: 25 kg multi-layer moisture-protected bags; bulk super sacks available upon request
• Shelf life: 24–36 months under dry, cool storage conditions

3. Core Industrial Applications
   PEI is extensively used in aerospace interior components, automotive under-the-hood systems, electrical connectors, semiconductor equipment, and high-performance insulation parts. In electronics, it is favored for connectors, coil formers, and high-heat housings due to its superior dielectric strength and thermal endurance. In aerospace and automotive industries, PEI replaces metals and lower-grade plastics to reduce weight while maintaining structural rigidity and flame safety compliance. Compared to conventional engineering plastics, PEI delivers significantly higher heat resistance, superior creep resistance, and longer lifecycle performance under continuous mechanical and thermal load.
4. Competitive Advantages

• Exceptional thermal stability enabling performance in extreme operating environments
• Inherent flame retardancy eliminating need for additive flame-retardant systems
• High dimensional stability under thermal and mechanical stress
• Strong dielectric and insulating properties for advanced electronics applications
• Reliable supply consistency through industrial-grade polymer production networks
• Efficient logistics handling via standardized pelletized form for global shipping
• Strong cost-performance ratio in high-value engineering applications
• Availability of technical datasheets, compliance documentation, and engineering support for OEM integration
• Reduced lifecycle replacement costs due to superior durability and long service life

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20MT
• Loading capacity (MT per container): 20–22 MT per 20FT container (depending on packaging configuration and density optimization)