PEEK (Polyetheretherketone) and PEI (Polyetherimide) 9085 are two high-performance thermoplastics commonly used in industries such as aerospace, automotive, and medical. While they share some similarities, they also have significant differences that make them suitable for different applications. In this article, we'll explore the key differences between PEEK and PEI 9085.

PEEK Filament

PEEK is a high-performance thermoplastic with excellent mechanical, thermal, and chemical resistance properties. It has a high melting point of around 343°C, making it suitable for applications where high temperature resistance is required. PEEK is commonly used in aerospace, automotive, and medical applications.

One of the main advantages of PEEK is its high strength and stiffness. It has a tensile strength of up to 100 MPa and a modulus of elasticity of up to 4 GPa. Additionally, PEEK is highly resistant to chemicals, making it ideal for applications where exposure to harsh chemicals is expected.

However, PEEK is more difficult to print than other thermoplastics due to its high melting point and the need for a controlled printing environment. It's also more expensive than other thermoplastics, making it less suitable for low-cost applications.

PEI 9085 Filament

PEI 9085 is a high-performance thermoplastic known for its excellent mechanical, thermal, and electrical properties. It has a high glass transition temperature (Tg) of around 217°C, making it suitable for high-temperature applications. PEI 9085 is commonly used in aerospace and automotive applications.

One of the main advantages of PEI 9085 is its high strength and stiffness. It has a tensile strength of up to 90 MPa and a modulus of elasticity of up to 4 GPa. Additionally, PEI 9085 is highly resistant to impact and wear, making it ideal for applications where high strength and durability are required.

PEI 9085 is also easier to print than PEEK, making it more accessible for 3D printing applications. It has a lower melting point and doesn't require as controlled of a printing environment. Additionally, it's less expensive than PEEK, making it more suitable for low-cost applications.

Which One Should You Choose, PEEK or PEI9085?

Choosing between PEEK and PEI 9085 ultimately depends on your specific needs and application requirements. If you're looking for a material with excellent mechanical, thermal, and chemical resistance properties, and you have a larger budget, PEEK may be the right choice. If you need a more affordable material with high strength and stiffness that's easier to print, PEI 9085 may be the better option.

In conclusion, PEEK and PEI 9085 are two high-performance thermoplastics with unique properties that make them suitable for different applications. As additive manufacturing technology continues to evolve, we can expect to see new materials and filaments that will further expand the possibilities of 3D printing.