From Special Engineering Plastics
to Precision Parts
GREFEE demonstrates exceptional strength in high-performance engineering plastics, with a complete and efficient industrial chain. Centered on premium materials including PEEK, PEI, PPS, PPSU, PSU, PES and PAI, GREFEE coordinates production processes with precision and excellence, delivering one-stop solutions from material modification and mold development to injection molding, CNC finishing and quality inspection.
Precision mold manufacturing + injection molding + integrated post-processing
Built for aerospace, electronics, medical, automotive and other high-end industries
GREFEE has developed dedicated processing standards and production standards for special materials, supported by mature project management and certification systems.
Standardized Project Quality Control Workflow
From mold engineering review to in-process control and final approval, each stage follows a structured quality assurance path tailored to special engineering plastic manufacturing.
End-to-End Special Materials Services
Centered on special engineering plastics, GREFEE organizes profile production, precision mold manufacturing, injection molding, CNC machining and 3D printing into clear service modules for faster understanding and smoother project communication.
Profile Manufacturing Profile Manufacturing
Custom sheets, rods, tubes, profiles and precision machined substrates for multi-scenario applications.
Precision Mold Manufacturing & Injection Molding Precision Mold Manufacturing & Injection Molding
High-end tooling and molding for PEEK, PEI, PPS, PPSU, PSU, PES, PAI and TPI parts with stable quality output.
Precision CNC Machining Precision CNC Machining
Integrated CNC grinding, milling, turning, planing and drilling with strict tolerance control for high-performance plastics.
3D Printing 3D Printing & Rapid Prototyping
Fast conversion from design files to functional parts for research, validation and small-batch customized production.
A Manufacturing Partner You Can Trust
GREFEE is a well-established group company focusing on precision mold manufacturing and injection molding for over 20 years. We have cooperated with more than 1,000 companies worldwide, making us one of the most trusted Chinese factories for global high-end customers. We possess mature technologies and rich project experience in mold design and injection molding of special materials, and have built a full-industry-chain precision manufacturing system.
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Special materials mold making & injection experience
Global manufacturing cooperation cases
Core high-performance engineering plastic families
Quality systems for medical, automotive and aerospace
How We Deliver
Starting from customers’ product design needs, GREFEE provides full-process services including customized material selection, mold R&D, small-batch prototyping, process optimization, mass production and post-processing, greatly shortening R&D cycles and reducing production costs.
Material Selection & Modification Material Selection & Modification
Customized resin selection, functional filling and property optimization based on application requirements.
Precision Mold Design Precision Mold Design
Tooling architecture aligned with high-temperature and high-viscosity processing characteristics.
Prototyping & Validation Prototyping & Validation
Trial molds, dimensional verification, process tuning and performance evaluation before scale-up.
Mass Production & Inspection Mass Production & Inspection
Integrated injection molding, CNC post-processing and full-link quality inspection for reliable delivery.
Core Product System
GREFEE develops customized products in multiple specifications and categories tailored to the properties of different special engineering plastics, covering general modification and functional modification to meet application needs across fields. Product images are organized as an interactive material library, showing product names by default and application features on hover.
PEEK Series PEEK Series
Industry-leading PEEK precision injection molding for aerospace, medical, electronics and other high-end applications. GREFEE strictly controls temperature, pressure and speed to deliver stable dimensional accuracy and repeatable quality.
PEI Series PEI Series
PEI injection molding with precise and durable tooling, stable processing control and consistent quality output for electronics, medical and high-end industrial sectors.
PPS Series PPS Series
PPS parts sourced from premium raw materials and manufactured with mature tooling and precision injection control for communications, automotive and aerospace applications.
PPSU Series PPSU Series
PPSU food, medical and industrial application products backed by 30 years of engineering experience in precision mold design and injection molding for demanding sectors.
PSU Series PSU Series
Optimized PSU precision injection molded parts for high-temperature, corrosion-resistant and transparent-product applications in lighting, medical and industrial equipment.
PES Series PES Series
PES products with excellent heat resistance, mechanical performance, chemical stability and UL94 V-0 flame retardancy for laboratory, medical and water treatment applications.
PAI Series PAI Series
PAI high-temperature materials deliver exceptional performance: used in aerospace for thermal insulators, sector gears, bushings and screws; in automotive for transmission parts, hydraulic seals, axial thrust bearings, thrust washers and check balls; in oil & gas for seals, support rings, downhole guides, labyrinth seals, bearings and bushings; in machinery for bearings, gears, cams and wear rings.
PAI semi-thermoplastic injection molding is challenging: it requires high injection pressure and temperature for cavity filling, is single-shot moldable with no secondary injection, and is moisture-sensitive requiring thorough drying before processing.
GREFEE engineers have successfully overcome PAI semi-thermoplastic injection molding challenges. Leveraging PAI’s high strength and temperature resistance, our team strictly controlled every step from mold design to injection molding for successful production.
TPI Series TPI Series
Thermoplastic polyimide (TPI) is one of the highest-performance polymer materials available, offering long-term dimensional stability, wear resistance, low density and extreme-temperature performance from -269°C to 280°C.
Core Capabilities
Provide modification services for PEEK, PEI, PPS, PPSU, PSU, PES, PAI, TPI and other special engineering plastics. Custom filling and functional modification optimize high temperature resistance, wear resistance, electrical conductivity, self-lubrication and other properties per customer requirements.
Special Plastic Raw Material Modification Special Plastic Raw Material Modification
Customized filling, conductivity, self-lubrication and high-temperature performance enhancement for PEEK, PEI, PPS, PPSU, PSU, PES, PAI and TPI.
Precision Mold Design & Manufacturing Precision Mold Design & Manufacturing
Thousands of mold design and production cases with structures adapted to high-temperature and high-viscosity molding conditions.
Precision CNC Machining Precision CNC Secondary Processing
High-precision CNC centers and mirror EDM support milling, drilling and boring for tight-tolerance finished parts.
Technical Strength & Quality Control
Led by experienced professional engineers, supported by advanced production equipment, a material testing center and a full-process quality control system, GREFEE provides the foundation for stable delivery of special material projects.
Raw Material Control Raw Material Control
In-house standards for incoming material specification and performance inspection.
Mold Control Mold Control
Multi-round design reviews and full inspection of mold parts for precision and compatibility.
Process Control Process Control
Mold flow analysis, DFMEA and SPC (X-R) process control with real-time parameter monitoring.
Finished Product Control Finished Product Control
Appearance, dimension and performance inspection before delivery, supported by authoritative reports.
Full Inspection System Full Inspection System
Automated equipment plus professional manual inspection for all-round quality assurance.
One-Stop Solution for Special Engineering Plastics
Starting from customers’ product design needs, GREFEE provides full-process services including customized material selection, mold R&D, small-batch prototyping, process optimization, mass production and post-processing, greatly shortening R&D cycles and reducing production costs. Leveraging our full-industry-chain advantages, we ensure stable product quality and timely delivery.
Rapid feedback on project requirements and manufacturing recommendations
Core certifications covering medical, automotive and aerospace systems
Confidential collaboration process for drawings, parts and project documents
FAQ
Frequently asked questions related to supported material families, manufacturing scope, application industries and quality assurance.
