REFEE Advanced Materials
Precision Mold Manufacturing & Injection Molding
GREFEE in Advanced Engineering Plastics
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, PAI, GREFEE coordinates production processes with precision and excellence, fully meeting customers’ demands for diversified, customized and high-end special engineering plastic products. It has become a key driver of high-quality development in aerospace, electronics, medical, automotive and other industries. In the field of special engineering plastics, GREFEE delivers comprehensive, one-stop high-quality services to global customers with superior technologies.
High-Temperature Special Engineering Materials
Profile Manufacturing
Core products cover high-performance special engineering plastics such as PEEK, PPS, PEI, PES, PPSU, PSU, PAI, PI, PBI, supporting customized production of sheets, rods, tubes, profiles and precision machined parts to meet multi-scenario application needs.
Extrusion and compression molding enable precise production of tubes, rods and special-shaped profiles with accurate dimensions and excellent surface gloss, providing high-quality substrates for subsequent processing. Compression molding offers tailored solutions for products with special shapes and high-performance requirements, suitable for various high-end applications.
Precision Mold Manufacturing & Injection Molding
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.
Backed by an experienced technical team, advanced production equipment and a complete quality control system, GREFEE has formed core competitiveness in complex-structure special plastic mold design and high-precision high-temperature injection molding. Our products are widely used in aerospace, automotive manufacturing, medical biology, 5G communications, new energy, high-end equipment and other fields, making us a core partner for special engineering plastic applications in high-end manufacturing.
GREFEE has obtained professional certifications including ISO 9001, ISO 13485 (medical), IATF 16949 (automotive) and AS 9100D (aerospace). The company has a complete project management process and has developed dedicated processing and production standards for special materials based on years of experience.
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.
PEEK Series
GREFEE specializes in PEEK precision injection molding and leads the industry. Our team is proficient in PEEK’s high temperature resistance, chemical corrosion resistance and high mechanical strength. Equipped with advanced injection molding equipment and precision mold technology, we strictly control temperature, pressure, speed and other parameters to ensure high dimensional accuracy and stable quality, widely applied in aerospace, medical, electronics and other high-end fields.
| Product Specifications | Product Features | Application Overview |
| PEEK Resin | PEEK resin boasts excellent comprehensive properties such as high temperature resistance, self-lubrication, flame retardancy, hydrolysis resistance, wear resistance, easy processability and high mechanical strength | 1. Components for aircraft wings, fuselage structures and engines: reduces weight while improving corrosion resistance and high-temperature performance |
| 2. Auto parts including engine inner covers,bearings, gaskets, seals and clutch gear rings | ||
| PEEK Glass Fiber Reinforced | PEEK glass fiber reinforced material features significantly improved mechanical strength, enhanced rigidity, excellent dimensional stability and low creep property | 3. Components for electronic devices like computers, mobile phones, circuit boards, printers and batteries (e.g., insulators, connectors) |
| PEEK Carbon Fiber Reinforced | PEEK carbon fiber reinforced material achieves substantial upgrades in strength, rigidity, heat resistance and wear resistance | 4. Parts for pumps, valves, pipelines and other equipment; components for solar energy and other new energy fields |
| 5. Parts for food processing equipment; yarn guide pins and yarn feeders in textile machinery | ||
| PEEK Ceramic Modified | PEEK ceramic modified material has enhanced toughness, improved creep strength, excellent dimensional stability, as well as superior wear resistance and friction reduction performance | 6. Components for semiconductor equipment (e.g., wafer carriers, chip jigs) |
| 7. Insulating materials for wires and cables; high-performance seals (e.g., sealing rings, oil seals) | ||
| PEEK (with Graphite, Carbon Fiber, Carbon Nanotubes, Titanium Diboride, Metal Powder, etc.) | The material combines the properties of Teflon (low temperature resistance, low friction coefficient), graphite (electrical conductivity, thermal conductivity, lubricity), carbon nanotubes (ultra-high strength and rigidity, excellent electrical/thermal conductivity), molybdenum disulfide (self-lubrication, wear resistance) and metal powder (magnetism, which enhances the electrical and thermal conductivity of the composite material) | 8. Joints, gears and other parts of robotic arms and robotic joints |
| 9. Components for analytical instruments (e.g., chromatographic columns, sample bottles) | ||
| 10. Nuclear energy parts, military industry equipment parts, high-speed train parts and large aircraft parts, etc |
PEI Series
GREFEE excels in PEI injection molding with guaranteed quality. Our experienced team and advanced technologies ensure precise and durable molds. During injection molding, we precisely control parameters with high-end equipment and mature processes, perfectly solving PEI processing challenges and stably supplying high-quality products for high-end industries.
| Product Specifications | Product Features | Application Overview |
| PEI Resin | PEI products offer excellent flame retardancy and low smoke density, strong high-temperature stability, good hydrolysis resistance and steam resistance. They also feature outstanding mechanical properties, electrical insulation performance, low shrinkage, and high dimensional accuracy. | 1. Components around aircraft engines (e.g., engine covers, oil pipes) that can withstand high temperatures and complex mechanical stresses. |
| 2. High-temperature automotive connectors, lamp sockets for high-power car lamps and indicator lights, sensor housings, and other components. | ||
| PEI (Glass Fiber Reinforced) | Glass fiber reinforced PEI exhibits significantly improved mechanical strength, enhanced heat resistance, better dimensional stability, and good flame retardancy. | 3. Manufacturing of surgical instruments and tool housings, which have good biocompatibility, high-temperature resistance, and can withstand high-temperature sterilization. |
| PEI (Carbon Fiber Reinforced) | Carbon fiber reinforced PEI provides high strength and high modulus. It has advantages including high heat resistance, low creep, and excellent dimensional stability. | 4. Replacing metal to manufacture optical fiber connectors, which can optimize component structure, simplify manufacturing and assembly steps, and maintain more precise dimensions. |
| 5. Manufacturing of chemical equipment components (e.g., valves, pump bodies). | ||
| PEI Resin (Color-Matched) | High-temperature resistant pigments that resist fading in high-temperature environments; a special light stabilization formula enhances color stability. | 6. Stable performance under long-term exposure to steam and hot water, suitable for manufacturing components in food processing (e.g., conveyor belts and food molds for food machinery). |
| 7. Used in 3D printing to produce parts with various complex structures. | ||
| PEI (with PTFE, Graphite, Carbon Nanotubes, Molybdenum Disulfide, Metal Powders, etc.) | PTFE provides low-temperature resistance and a low friction coefficient; graphite offers good electrical/thermal conductivity and lubricity; carbon nanotubes deliver extremely high strength/stiffness and excellent electrical/thermal conductivity; molybdenum disulfide features lubricity and wear resistance; metal powders enhance magnetic, electrical, and thermal conductivity. | 8. Can be used to manufacture brackets or housings for optical parts and components. |
| 9. Components in laboratory equipment (e.g., test boxes, sample boxes). | ||
| 10. Combs, eyeglasses, cutlery, fountain pens, food clips, filters, electronic cigarettes, etc. |
PPS Series
GREFEE sources PPS raw materials from world-renowned manufacturers to ensure superior quality. Our experienced team uses advanced technologies to produce precise and durable molds. During injection molding, we precisely control parameters with high-end equipment and mature processes, solving PPS processing challenges and stably supplying high-quality products for communications, aerospace and other high-end industries.
| Product Specifications | Product Features | Application Overview |
PPS Resin | PPS resin products possess numerous superior properties: high temperature resistance with a long-term service temperature of over 200°C; excellent dimensional stability; acid and alkali resistance; good mechanical performance; high strength; and high rigidity. | 1. Components such as impellers and shells of water pumps, motor housings, and water insulation parts; fuel tank mouths, coil bobbins, nut components, high-temperature wire connectors, and electrical connection parts. 2. Components around engines, including intake manifolds, compressor parts, high-temperature connectors, high-power lamp holders, and sensor housings. |
| PPS (Glass Fiber Reinforced) | Glass fiber reinforced PPS features various special characteristics: excellent mechanical properties, high strength, high modulus, and the ability to withstand large loads and achieve permanent deformation resistance. | Electronic transformer voltage stabilizer skeletons, high-frequency coils, plugs, sockets, junction boxes, motor brackets, and insulating parts of shell radiators. |
| PPS (Carbon Fiber Reinforced) | Carbon fiber reinforced PPS can quickly transfer current and heat; it has high mechanical strength, good rigidity, and excellent wear resistance. It also offers good dimensional stability and chemical stability. | Mechanical parts such as bearings, gears, eccentric shafts, and pistons in the mechanical industry; shells of various valves and pumps; and components of precision instrument equipment. |
| PPS (Color-Matched) | High-temperature resistant pigments that do not easily fade in high-temperature environments; special light stabilization formulas provide high color stability. | Chemical industry applications: reaction tanks, pipelines, pipes, impellers of chemical pumps, valves, gaskets, filter plates, and filter screens of filtration equipment. |
| PPS (with PTFE, Graphite, Carbon Nanotubes, Molybdenum Disulfide, Metal Powders, etc.) | PTFE provides low temperature resistance and a low friction coefficient; graphite offers good electrical and thermal conductivity as well as lubricity; carbon nanotubes exhibit extremely high strength and rigidity along with superior electrical and thermal conductivity; molybdenum disulfide features lubricity and wear resistance; metal powders can enhance the material’s electrical and thermal conductivity. | 1. Wind power generation fan blade components; solar water heater pipelines and headers; insulation layers and sheaths of wires and cables; cable terminal boxes. 2. Tableware such as chopsticks and spoons. |
PPSU Series
GREFEE is a leader in PPSU injection molding. Our engineering team has 30 years of extensive experience and strong technical capabilities in precision mold injection of special engineering plastics, easily handling complex material processing and precision mold design. GREFEE provides comprehensive solutions for global customers, standing out in the PPSU market with superior quality and professional services.
| Product Specifications | Product Characteristics | Application Overview |
| Medical Grade PPSU | PPSU exhibits excellent biocompatibility, high-temperature resistance, chemical corrosion resistance, and mechanical strength. | 1.Manufacturing medical devices such as surgical instruments, infusion devices, dialyzers, as well as medical catheters, connectors, filters, etc. 2.Suitable for applications requiring repeated high-temperature steam sterilization. |
| Baby & Infant Care Grade PPSU | PPSU is a safe, non-toxic, and odorless material that is harmless to infants’ health and features good heat resistance and impact resistance. | 1.Used for manufacturing baby feeding bottles. 2.Also applicable to other baby products such as baby tableware, water cups, teething toys (pacifiers), etc. |
| Electrical & Electronic Grade PPSU | PPSU offers good insulation performance, high-temperature resistance, and mechanical properties. | 1.PPSU connectors, sockets, relays, etc. 2.Applied in 5G communication, artificial intelligence (AI) fields. 3.Also used for manufacturing home appliance components of microwaves, ovens, dishwashers, such as baking trays, racks, inner tanks, etc. |
| Automotive & Aerospace Grade PPSU | PPSU boasts high-temperature resistance, chemical corrosion resistance, lightweight, high strength, and other high-performance properties. | 1.Engine components, fuel system parts, sensors, etc. 2.As well as aircraft interior parts and structural components. |
PPSU Food & Medical Grade
PPSU products contain no carcinogens or harmful substances and are food-contact safe. They withstand temperatures up to 207°C, support microwave heating and repeated steam sterilization, with high hardness and impact strength. Widely used in baby bottles, food containers, surgical instruments, infusion devices, patient monitors and more.
PPSU Industrial Applications
PPSU offers good insulation, high temperature resistance and mechanical properties for connectors, relays, PCB components, automotive fuel system parts and sensors. In aerospace, it is used for small structural and interior parts; in industrial filtration systems and pump bodies, it delivers wear and chemical resistance.
PSU Series
Process optimization at GREFEE significantly improves PSU precision injection-molded products. Higher efficiency boosts output and market responsiveness, while ensuring performance and service life; cost reduction enhances price competitiveness. Performance upgrades include improved temperature resistance for automotive engine peripherals, better corrosion resistance and stronger mechanical strength for stable performance in electronic equipment, meeting high standards across fields.
| Product Specifications | Product Features | Application Overview |
| Medical Grade PSU | PSU operates stably at 150°C – 175°C for long-term use, can withstand higher temperatures for short periods, and has a high heat deflection temperature. | 1. PSU surgical instruments, syringes, ventilators, etc. |
| 2. Resistant to high-temperature steam sterilization and corrosion from various chemical disinfectants; used for dialyzer filter cores, medical ultrasound probes, etc. | ||
| Electrical & Electronic Grade PSU | Excellent electrical insulation, high-temperature resistance, and mechanical strength ensure stable operation of electronic equipment in complex working environments. | 1. Coil bobbins, contactors, connectors, capacitor films, etc. 2. Manufacturing enclosures for electrical equipment, such as small transformer housings, electrical switch housings, etc. |
| Automotive Grade PSU | PSU polysulfone maintains stable performance in high-temperature, high-pressure, and harsh chemical environments, meeting the stringent requirements of automotive engine components. | 1. PSU can be used for automotive engine covers, intake manifolds, fuel pumps, etc. |
| 2. Sensors, connectors, and other components in automotive electronic control systems. | ||
| Food Processing Grade PSU | PSU polysulfone has good corrosion resistance and high-temperature resistance, capable of withstanding various chemicals and high-temperature environments in food processing. | 1. PSU for manufacturing pipes, valves, pumps, filters, heat exchangers, etc. |
| 2. Food containers, beverage cans, coffee pots, microwave tableware, etc. |
PSU High-Temperature Transparent Products
PSU transmits light in specific wavelengths, suitable for light-transmission applications. It offers good strength, toughness, chemical corrosion resistance and flame retardancy, widely used in lighting systems and high-temperature instrument windows, providing reliable solutions for high-temperature light-transmission needs.
PSU Industrial Applications
PSU features high strength, rigidity, pressure and impact resistance, and strong chemical corrosion resistance for chemical pipelines and reactor internals. It meets high-temperature requirements in electronics and electrical appliances such as high-temperature sockets, making it widely valuable in industry.
PES Series
PES (Polyethersulfone) is used in electrical and electronics for PCBs, chip trays and connectors, ensuring stable high-temperature operation with high heat resistance and insulation. It is applied in surgical instruments, water treatment dialysis membranes and dental instruments compatible with high-temperature sterilization. In automotive, it is used for engine peripheral parts and sensors; in food processing, it provides non-toxic, hydrolysis-resistant food-contact components.
| Product Specifications | Product Features | Application Overview |
| Electrical & Electronic Field | Excellent high-temperature resistance, good dimensional stability, resistance to various cleaning agents, and outstanding insulating properties. | Manufacture of electronic components, potentiometer housings and bases, connectors, and PES thin films. |
| Automotive Industry Field | Good rigidity and dimensional stability, high-temperature creep resistance, excellent mechanical properties, and resistance to gasoline, diesel, and various types of engine oil. | Manufacture of gears, brake shaft bushings, and oil pump components from PES material. |
| Water Treatment Equipment Field | PES can be sterilized via multiple methods, including steam sterilization, dry heat sterilization (180°C), and gamma ray sterilization. | Manufacture of medical devices such as dental drill handles, as well as surgical containers and syringes from PES. |
| Industrial Machinery Field | High-temperature creep resistance, dimensional stability, resistance to oil erosion, good insulating properties, and excellent mechanical properties. | Engine and carburetor parts, copier components, camera parts, projector parts, etc. |
Outstanding Properties of PES High-Temperature Products
Excellent heat resistance with a glass transition temperature and heat distortion temperature around 200°C, enabling long-term stable high-temperature operation. Good mechanical properties including high strength, rigidity and impact toughness. Superior chemical stability resistant to acids, alkalis and organic solvents. UL94 V‑0 flame retardancy for fire‑critical applications. High transparency, good appearance and excellent dimensional stability.
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 Torlon (Polyamide-Imide) | Processing Solutions | Special Plastic Classification |
| Thermoplastic Special Plastics | Injection molding, extrusion molding, calendering molding, etc. Good fluidity. When heated to a certain temperature, they can flow like liquid in the mold to fill complex mold cavities. | PEEK (Polyetheretherketone), PEI (Polyetherimide), PPS (Polyphenylene Sulfide), PPSU (Polyphenylsulfone), PSU (Polysulfone), PES (Polyethersulfone), TPI (Thermoplastic Polyimide) |
| Semi-Thermoplastic Special Plastics | One-time injection molding or compression molding. Exhibits thermoplastic properties only in a specific temperature range; precise control of the temperature range is crucial. | PAI Torlon (Polyamide-Imide) |
| Thermosetting Special Plastics | Compression molding, die-casting molding, cross-linking reaction (irreversible). Undergoes chemical reaction and cross-linking curing when heated; will not soften or flow upon reheating. | PI (Thermosetting Polyimide), PBI (Polybenzimidazole) |
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. This breakthrough promotes wider PAI application in aerospace and high-end manufacturing, demonstrating GREFEE’s technological innovation strength.
TPI Series
TPI (Thermoplastic Polyimide) can be injection molded and extruded to fill cavities effectively for complex-shaped parts. It has a narrow processing window requiring precise temperature control, used for aircraft interior and small structural parts, high-precision electronic and insulation components, and automotive engine peripheral heat-resistant parts (sensors, bearings, gears) to improve performance and reliability.
| Material Classification | Product Characteristics | Product Applications |
| Thermoplastic Polyimide (TPI) | Injection molding, extrusion molding, calendering molding, etc. Good fluidity. When heated to a certain temperature, it can flow like a liquid in the mold to fill complex mold cavities. | TPI is used to manufacture various mechanical parts, such as gears, bearings, sliders, self-lubricating bearings, piston rings, and sealing rings. Its excellent wear resistance and impact resistance can extend the service life of mechanical parts. |
| Thermosetting Polyimide (PI) | Compression molding, die-casting molding, irreversible cross-linking reaction. It undergoes chemical cross-linking and curing when heated, and will not soften or flow upon reheating. | PI is mainly used for structural components such as aircraft wings and fuselages, as well as parts for rockets and missiles. It is also applied as a surface coating on high-temperature furnaces, heat exchangers, electronic equipment, and other devices. |
TPI is developed based on traditional thermosetting polyimide (PI) and is one of the highest‑performance organic polymer materials. It offers corrosion resistance, fatigue resistance, wear resistance, impact resistance, low density, low noise, long service life, and excellent extreme‑temperature stability (long‑term use at ‑269°C to 280°C). Its thermal decomposition temperature reaches up to 600°C, making it one of the most thermally stable polymers available.
Core Capabilities
1.Special Plastic Raw Material Modification
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.
| Material Name | Top Global Suppliers | Core Brands/Products |
| PEEK (Polyether Ether Ketone) | 1. Victrex plc (UK) 2. Solvay (Belgium/Syensqo) 3. Evonik Industries (Germany) | VICTREX™ PEEK AvaSpire™ PEEK Vestakeep® PEEK |
| PEI (Polyetherimide) | 1. SABIC (Saudi Arabia) 2. RTP Company (USA) 3. Ensinger (Germany) 4. Mitsui Chemicals (Japan) | ULTEM™ PEI Glass/carbon fiber reinforced PEI Precision molding grade PEI |
| PPS (Polyphenylene Sulfide) | 1. Toray Industries (Japan) 2. Polyplastics Co., Ltd. (Japan) 3. Solvay (Belgium) 4. Celanese Corporation (USA) | Fiber/injection molding grade PPS DURAFIDE® PPS Ryton® PPS |
| PPSU (Polyphenylsulfone) | 1. Solvay (Belgium/Syensqo) 2. BASF SE (Germany) 3. Sumitomo Chemical (Japan) | Radel® PPSU Ultrason® P Medical grade PPSU |
| PSU (Polysulfone) | 1. Solvay (Belgium) 2. BASF SE (Germany) 3. Sumitomo Chemical (Japan) | UDEL® PSU Ultrason® S Transparent grade PSU |
| PES (Polyethersulfone) | 1. BASF SE (Germany) 2. Solvay (Belgium) | Ultrason® E Veradel® PESU |
| PAI (Polyamide-Imide, Torlon) | 1. DuPont (USA) 2. Solvay (Belgium) 3. Evonik Industries (Germany) | Torlon® PAI PAI modified composite materials |
| TPI (Thermoplastic Polyimide) | 1. Mitsui Chemicals (Japan) 2. DuPont (USA) 3. Kaneka Corporation (Japan) | AURUM™ TPI, NEW-TPI Vespel® TPI Apical® TPI Film |
2. Precision Mold Design & Manufacturing
Professional mold R&D and processing team custom-develops high-precision injection and compression molds tailored to the high-temperature, high-viscosity characteristics of special engineering plastics. With thousands of mold design and production experiences, our molds feature reasonable structure, high precision and strong durability, suitable for molding various special plastic materials.
3. Precision CNC Machining
Equipped with high-precision CNC machining centers, mirror EDM and other CNC equipment for milling, drilling, boring and other fine processing of finished special engineering plastic parts. Strict tolerance control ensures dimensional accuracy and surface finish, completing secondary precision forming of injection-molded parts.
Technical Strength
1. Experienced Professional Team
Led by senior engineers with over 30 years of special engineering plastic injection experience, our team masters material properties, mold design, process debugging and quality problem-solving, efficiently handling complex working conditions and customized demands to provide core technical support for R&D and production.
2. Advanced Production Equipment
Standardized high-precision workshops equipped with high-speed injection molding machines (Sumitomo, Haitian), multiple CNC precision machining centers, mirror EDM and other advanced equipment, realizing integrated and efficient operation of mold manufacturing, injection molding and CNC processing. Hardware strength ensures product precision and production efficiency.
3. Material Testing Center
Professional material testing center equipped with melt flow rate testers, tensile/impact testers, high-precision CMM, melt index testers, Rockwell hardness testers, infrared spectrometers and other full‑featured testing equipment. It performs full‑dimensional testing of material melt flow rate, mechanical properties, thermal properties, molecular structure, and finished product dimensions and appearance, providing scientific data support for material modification, process optimization and quality control.
4. Quality Control
GREFEE regards quality as the core of corporate development, establishing a full‑process standardized quality control system from raw material incoming to finished product delivery, with layer‑by‑layer inspection and real‑time monitoring to ensure stable and consistent product quality.
Brand Cooperation
We impose extremely strict requirements on raw materials, all sourced from world‑renowned suppliers. All special materials supplied by GREFEE meet SGS requirements.
| Material Name | Key Characteristics | Mold Manufacturing Key Points | Injection Molding Key Points | Core Application Fields |
| PEEK (Polyether Ether Ketone) | High temperature resistance, chemical corrosion resistance, high mechanical strength, excellent biocompatibility, and comprehensive performance; available in multiple specifications such as resin, glass fiber/carbon fiber reinforced, and ceramic modified | Mold flow analysis to avoid bubbles/sink marks; DFMEA risk assessment; micron-level precision with high-temperature resistant mold steel; compatible with thousands of injection/molding mold specifications | Independent raw material factory to control quality; senior engineers with 30 years of experience precisely adjust temperature/pressure/speed; process optimization for different modified materials; SPC process control to ensure stability | Aerospace (radome, oil pipeline fittings), Medical (implants, skull), Electronics (connectors, insulators), General precision parts (bearings, screws, compressor valve plates) |
| PEI (Polyetherimide) | Strong high-temperature stability, flame retardancy with low smoke, hydrolysis and steam resistance, low shrinkage rate and high dimensional accuracy; high-temperature color matching available with stable color | Adapt to high-temperature molding characteristics with high-temperature resistant mold steel; optimize cavity/gating system based on shrinkage rate; mold flow analysis to solve insufficient filling; micron-level precision for complex structures | Independent production of multi-specification raw materials (resin, glass fiber/carbon fiber reinforced, color-matched); parameter control based on application scenarios—precision-focused for electronic parts, biocompatibility-focused for medical parts | Electronics (chip test fixtures, fiber optic connectors), Aerospace (spacecraft housings), Medical (equipment housings), Daily necessities (eyeglasses, e-cigarette accessories, food clips) |
| PPS (Polyphenylene Sulfide) | Long-term service temperature above 200℃, strong chemical stability, acid and alkali resistance, high mechanical strength; ideal metal substitute; performance upgrade for glass fiber/carbon fiber reinforced types | Mold flow analysis to optimize gate/cooling system and solve warpage/cracking issues; high-precision processing to ensure mold tightness; suitable for molding small electronic/automotive parts | Independent production of multi-specification raw materials; precise control of holding time; large-scale mass production to meet automotive/electronic industry needs; strict control of dimensional stability | Automotive (hydraulic pump/fuel pump housings, intake manifolds, high-temperature connectors), Electronics (connectors, transformer bobbins), Chemical industry (pipes, filter plates), Machinery (gears, valves, sealing fasteners) |
| PPSU (Polyphenylsulfone) | Food and medical grade, non-toxic and odorless, excellent biocompatibility; high temperature resistance up to 207℃, reusable steam sterilization, impact and wear resistance | Optimize cavity/gating system based on fluidity/shrinkage rate; special mold surface treatment to ensure demolding and surface finish; micron-level precision for infant/medical small parts | Adoption of food/medical grade raw materials without harmful substances; sterile control for medical parts, impact resistance enhancement for infant products; precise temperature and pressure control to ensure batch consistency | Medical (surgical instruments, dialyzers, sterilization boxes), Infant products (baby bottles, tableware), Electronics (5G connectors, relays), Automotive & Aerospace (fuel system components, small structural parts) |
| PSU (Polysulfone) | Good light transmittance, stable operation at 150-175℃ for long term, high mechanical strength, chemical corrosion resistance, flame retardancy; process optimization for cost reduction and efficiency improvement | Adapt to light transmittance requirements; mold flow analysis to ensure uniform filling without defects; optimize cooling system with high-temperature resistant mold steel; micron-level precision for windows/filters and other products | Continuous process optimization to improve efficiency and reduce costs; parameter control by field—sterilization resistance for medical parts, high-pressure and corrosion resistance for automotive parts | Medical (surgical instruments, dialyzer filter elements), Electrical & Electronics (coil bobbins, transformer housings), Automotive (engine hoods, fuel pumps), Food processing (pipes, microwave tableware) |
| PES (Polyethersulfone) | Heat distortion temperature up to 200℃, flame retardancy reaching UL94 V-0 grade, acid/alkali and organic solvent resistance, high transparency, good dimensional stability | Mold flow analysis to optimize cavity/gating system and avoid warpage/bubbles; adoption of high-temperature resistant mold steel with special heat treatment; micron-level precision | Precise adjustment of temperature/pressure/speed; performance adaptation by application (insulation-focused for electronic parts, oil resistance-focused for automotive parts); large-scale mass production with SPC process control | Electrical & Electronics (printed circuit boards, chip trays, connectors), Medical (surgical instruments, dialysis membranes), Automotive (oil pump components, gears), Water treatment (filters, filter elements), Industrial machinery (copier/camera parts) |
| PAI (Polyamide-Imide, Torlon) | High strength, high temperature resistance, wear resistance, chemical corrosion resistance; semi-thermoplastic material with high injection molding difficulty, requiring one-time molding | Adoption of high-temperature resistant mold steel for high-pressure and high-temperature injection molding; optimize cavity/gating system to ensure filling; design special cooling system; multiple reviews to ensure mold precision | Full drying of raw materials to remove moisture; use of special high-pressure and high-temperature injection molding machines; precise control of temperature zones to achieve one-time molding; real-time quality monitoring throughout the process | Aerospace (aircraft thermal insulators, sector gears, bushings), Automotive (transmission components, sealing rings, thrust bearings), Oil & Gas (downhole seals, support rings), Machinery manufacturing (wear rings, cams) |
| TPI (Thermoplastic Polyimide) | Excellent high and low temperature performance (stable at -269~280℃ for long term), thermal decomposition temperature up to 600℃, corrosion/fatigue/wear resistance, low density, and best comprehensive performance; narrow injection molding temperature range | Adoption of special high-temperature resistant mold steel with special heat treatment for high-pressure and high-temperature resistance; mold flow analysis to optimize gating/cooling system; micron-level precision for complex structures | Strict control of raw material moisture; equipped with special ultra-high temperature injection molding machines; precise temperature control in narrow zones to minimize temperature and pressure fluctuations; full-process SPC monitoring | Aerospace (aircraft interior parts, small structural parts), Automotive (engine heat-resistant parts, sensors, bearings and gears), High-end electronics (high-precision components, insulation parts), Machinery (self-lubricating bearings, piston rings, sealing rings) |
Quality Control Links
Raw Material Control: In-house testing standards; inspect specifications and performance of all incoming materials to ensure quality at the source.
Mold Control: Multi-round design reviews and full inspection of mold parts to ensure precision and compatibility.
Process Control: Scientific management including mold flow analysis, DFMEA, SPC (X‑R) process control; real-time monitoring and precise adjustment of injection parameters.
Finished Product Control: Comprehensive performance evaluation after mold trials; full inspection of appearance, dimensions and performance before delivery, supported by authoritative test reports including SGS.
Full Inspection System: Combination of automated testing equipment and professional manual inspection for all-round, no-dead-angle control, ensuring every product meets high industry standards and customer needs.
One-Stop Solution
GREFEE focuses on special engineering plastics and provides one-stop solutions, realizing full-process independent control from raw material to finished product, delivering integrated, customized and efficient total solutions for customers. With exquisite mold injection technology and high machining precision, we meet complex component manufacturing. Advanced 3D printing services excel in both small-batch production and rapid prototyping.
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.
