Ultem®PEI Plastic Machining ULTEM™ PolyEtherImide (PEI) is an amber transparent high-performance polymer which combines high strength and rigidity at elevated temperatures with long term heat resistance. ULTEM™ is available in unfilled and filled grades in sheet, rod, tube, film and injection molded and machined parts
For machined parts requiring added strength, engineers turn to Ultem®. This high-performance thermoplastic is considered one of the best for exhibiting excellent strength and stiffness. Ultem® also maintains great dimensional stability at high temperatures (200°C).
Engineers turn to this material when they need parts machined for demanding applications in the Aerospace industry for aircraft and spacecraft and in Medical industry applications requiring repeated sterilization cycles.
As is the case with many high-performing plastics, understanding the machining characteristics of Ultem® is critical to producing a precision part. Many companies machine Ultem, but it`s critical to work with one that knows how to manage stresses in the material to achieve complex tight tolerance parts.
Ultem Pei Cnc Part Feature:
High mechanical strength
High rigidity
Very good dimensional stability
Relatively high long term service temperature
Flame resistant
Good chemical resistance
Excellent electrical properties
High strength to weight ratio
Glass-filled grade available
Low thermal conductivity
Highest dielectric strength of any thermoplastic
Transparent amber
High tensile strength
Semi transparent
Good UV resistance and weatherability
Most grades suitable for use with food
Can withstand dry heat sterilisation at 180°C, ethylene oxide gas and gamma radiation
Ultem Amber Processing Part Typical Components & Applications:
Reusable medical devices
Electrical/electronic insulators
Manifolds
Surgical probes
Clamps
Radomes
Thermostat housings
Bezels
Reflectors
Lamp sockets
Fuses
Gears
Bearings
Switches
Connectors
Pei Machining Component Industry Examples:
Instrumentation
Electrical/Electronics
Food technology
Aerospace
Medical
Pharmaceutical
Automotive
Telecommunications
Performance profile of PEI
Polyetherimide PEI has outstanding heat resistance (long-term temperature resistance of 180 ℃), showing good toughness and rigidity, with high hardness, very good abrasion resistance, outstanding electrical properties, so that it is extremely suitable for use in electrical and electronic insulation parts (i.e., at high temperatures require high strength and stiffness in a variety of structural components).PEI due to better resistance to hydrolysis, so that it is in the field of medical equipment and Analytical instruments are widely used in the field. It also has excellent mechanical properties, electrical insulation, irradiation resistance, high temperature resistance and abrasion resistance, and can pass through microwaves. At the same time as a non-crystalline material, due to the melting point of ultra-high makes PEI has good thermal insulation, so PEI profiles can be used to do high temperature 300 ℃ heat insulation board.
PEI main characteristics:
(1) PEI is characterized by high strength, high rigidity, ** and dimensional stability at high temperatures.
(2) PEI is an amber-colored transparent solid with inherent flame retardancy and low smoke without any additives, with an oxygen index of 47% and a combustion rating of UL94-V-0.
(3) The density of PEI is 1.28~1.42g/cm3, the glass transition temperature is 215℃, the heat distortion temperature is 198~208℃.
It can be used for a long time at 160~180℃, allowing intermittent higher use temperature of 200℃.
(4) PEI has excellent mechanical strength, electrical insulation properties, radiation resistance, high and low temperature resistance and fatigue resistance and molding processability;
Adding glass fiber, carbon fiber or other fillers can achieve the purpose of enhanced modification.
(5) high temperature resistance (HDT * over 200 ℃, UL continuous application temperature * over 170 ℃)
(6) Excellent flame retardancy (oxygen index greater than 4.7, low smoke and UL94V-0/5V)
(7) No need to add flame retardants
(8) excellent electrical properties (in a wide range of frequencies and temperatures have a stable dielectric constant and dielectric loss and * high dielectric strength)
(9) Excellent resistance to chemicals and radiation.
PEI is a high-performance engineering plastics, with excellent physical, chemical and mechanical properties, the following are the main application of PEI materials:
1. Electrical field: PEI materials have good electrical insulation properties and high temperature resistance, so they are commonly used in the manufacture of electrical components, electronic devices, cables and other products. For example, in cell phones, tablet computers and other electronic products, PEI materials are widely used in battery connectors, vibration motors, camera mounts and other components.
2. Medical device field: PEI material has excellent biocompatibility and chemical stability, so it is widely used in the field of medical devices. For example, PEI materials made of artificial joints, vascular stents, dental implants and other products have good biocompatibility and mechanical properties, which can effectively reduce the interaction between the implant and human tissue and loss.
3. Automotive parts field: PEI material has high strength and stiffness, and at the same time has good heat resistance and chemical corrosion resistance, so it is widely used in the field of automotive parts. For example, PEI materials made of brake discs, steering gears, gears and other products can withstand high temperature and high pressure environment to ensure the safety and reliability of the car.
4. Aerospace field: PEI material has high strength and stiffness, and at the same time has good resistance to high temperature and chemical corrosion, so it is widely used in aerospace field. For example, PEI materials made of aircraft engine blades, turbine blades, aviation instruments and other products can maintain stable performance and reliability in extreme environments.
In short, PEI material has a wide range of application prospects, its excellent physical, chemical and mechanical properties make it become one of the first choice for many high-performance products!
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