| Customization: | Available |
|---|---|
| Feature: | High Strength |
| Material: | 30% Glass Fiber Reinforced Pei |
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1. Excellent high-temperature performance:
High glass transition temperature (Tg): typically around 215 °C to 217 °C, which is the basis for its high-temperature performance.
High continuous use temperature: It can be used for a long time at temperatures of 170 ° C to 180 ° C without significant performance degradation.
High Heat Deformation Temperature (HDT): Approximately 200 °C to 210 °C under a load of 1.82 MPa (264 psi), much higher than most common engineering plastics such as PC, ABS, and Nylon.
Excellent thermal aging performance: After prolonged exposure to high temperatures, most of the mechanical and electrical properties can still be maintained.
Low thermal expansion coefficient: It belongs to a very low level in plastics, close to metals (such as aluminum), and is conducive to use with metal parts.
2. Inherent high strength, high rigidity, and toughness:
Has high tensile and bending strength.
Has a high bending modulus (rigidity) and can maintain good performance even at high temperatures.
In high-temperature thermoplastic materials, their notch impact strength and toughness are excellent (far superior to PPS, PEEK, etc.), and they are not easily brittle.
3. Excellent flame retardancy and low smoke, non-toxic:
UL94 V0 flame retardant rating: It can achieve the highest flame retardant rating at a very thin thickness (such as 0.41mm) without the need to add halogens or other flame retardants, making it an essential flame retardant material.
Extremely low smoke density: The amount of smoke produced during combustion is minimal.
Extremely low release of toxic gases: The amount of toxic gases (such as CO) released during combustion is very low. This characteristic makes it crucial in fields with strict fire safety requirements, such as aerospace, public transportation, electronics, and electrical engineering.
4. Excellent electrical performance:
Has stable and excellent dielectric properties (dielectric constant, dielectric loss factor) over a wide temperature range (40 ° C to+180 ° C) and frequency range.
High volume resistivity and surface resistivity.
High dielectric strength.
The performance is less affected by temperature and humidity, making it very suitable for high-frequency, high-temperature, and high-reliability electrical and electronic insulation components.
5. Good chemical resistance and hydrolysis resistance:
Can resist hydrocarbon solvents (gasoline, kerosene), alcohols, weak acids, weak bases, and cleaning agents.
Excellent hydrolysis resistance: Stable performance in high-pressure steam and hot water environments, able to withstand repeated high-temperature steam sterilization (such as high-pressure autoclave sterilization in medical applications).
Not resistant to strong alkalis and some polar solvents: can be corroded by strong alkalis (such as concentrated sodium hydroxide solution) and ketones (such as acetone), esters, aniline, etc.
6. Low moisture absorption:
The moisture absorption rate is very low (usually balanced at around 1.21.3%), which means:
Good dimensional stability, less affected by changes in environmental humidity.
Drying requirements before processing are relatively easy (but strict drying is still necessary).
Electrical performance is more stable in humid environments.
7. Good dimensional stability:
The low moisture absorption and low thermal expansion coefficient jointly ensure its excellent dimensional stability.
8. Inherent translucency/translucency:
Unfilled pure PEI is usually a semi-transparent material with a light amber color, which is an advantage in certain applications that require transparency or observation of the interior, such as mirrors and indicator lampshades.
9. Good gamma ray and UV resistance:
suitable for parts that require disinfection, sterilization (irradiation), or outdoor use.
Limitations/challenges to consider:
1. High cost: PEI is a very expensive high-performance engineering plastic, far higher than PC, ABS, Nylon, etc.
2. High melt viscosity: Processing flowability is not as good as many general-purpose plastics, requiring higher injection molding temperatures and pressures. Thin-walled complex parts may be difficult to fill.
3. Strict drying requirements: Very sensitive to moisture, it must be thoroughly dried before processing (usually recommended to dry at 150 ° C for 4 hours or longer), otherwise it will cause melt degradation and hydrolysis, seriously affecting performance.
4. Chemical resistance limitations: As mentioned earlier, it is not resistant to strong alkalis and some strongly polar solvents.
5. Surface hardness: Although the wear resistance is still acceptable, its surface hardness is not as good as PPS or some materials with added wear-resistant agents, which may require modification in certain high-friction applications.
6. Color limitation: The inherent light amber color may limit its use in applications that require pure white or bright colors (although it can be adjusted through coloring, transparency will be lost).
Main application areas:
With the above characteristics, PEI is widely used in demanding fields:
Aerospace:
Interior parts (brackets, panels, ducts), seat components, and electronic connector housings (required to be flame retardant, low smoke, and high temperature resistant).
Healthcare:
surgical instrument trays, dental appliances, endoscope components, and parts that require repeated high-temperature steam sterilization (utilizing their high-temperature hydrolysis resistance, gamma ray resistance, and biocompatibility).
Transportation:
sensors/connectors under the hood of automobiles, transmission components, reflective cups for car lights (high temperature resistant), interior parts for trains/subways (flame retardant and low smoke toxic).
Electronic and electrical:
chip testing sockets, high-temperature connectors, coil skeletons, circuit breaker components, switch parts (high heat resistance, high insulation, flame retardant).
Food Processing and Contact:
Compliant with FDA, EU, and other food contact regulations, used for coffee dispenser parts, microwave oven turntables, and food conveyor belt parts (high-temperature steam/hot water cleaning).
Industry:
Pump and valve components, compressor components, heat exchanger end plates, and precision components that require dimensional stability.
Optics: Non-precision optical supports and lens holders that require high temperature stability and certain transparency.
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