Pei CNC Processing Parts

Polyetherimide, abbreviated as PEI, is an amber-colored transparent solid with inherent flame retardancy and low smoke without any additives, an oxygen index of 47%, a UL94-V-0 combustion rating, and a density of 1.28~1.42g/cm3.PEI has strong high-temperature stability, even non-reinforced PEI, still has good toughness and strength. Therefore, PEI's superior thermal stability can be used to produce high-temperature heat-resistant devices.PEI has excellent mechanical properties, electrical insulation properties, irradiation resistance, high and low temperature resistance and abrasion resistance, and can be through the microwave.PEI also has good flame retardancy, chemical resistance and electrical insulation properties.

Advantages of PEI include

Transparent (but with an amber color);

Excellent resistance to chemicals, especially acids;

Higher temperature resistance, with a Tg point of 217 °C;

Naturally high flexural modulus, close to that of PC 10% GF without filler;

Excellent fire performance, natural flame retardant (can be V0 or more), low smoke density;

Good processability (compared to many other aromatic heterocyclic polymers);


In addition to the advantages, there are also disadvantages of PEI, after all, there are two sides to everything, including the following disadvantages.

Contains BPA (bisphenol A), which limits PEI's use to certain baby-related products;

Notch impact sensitivity, which is challenging to design;

While acid resistance is outstanding, alkali resistance is average, especially under heating conditions;

The price is still very expensive...

According to scientific and technological information indicates that with the widespread prevalence of PPS, PEI and PEEK machining, a large number of quality and quantity of machined parts have emerged in the market. Some of these trusted machining is more high-frequency applications in various industries such as aviation, electronics and automotive, and now PEI machining is widely used in the aviation industry for a brief description of why:

1.PEI parts processing with high dimensional stability

PEI machining is widely used in the aviation industry, this is because it is processed parts to ensure that all aviation components can have a stable size. These aviation components need to maintain high intensity work in harsh environments, its size deviation will lead to aviation machinery imbalance, so the choice of PEI machining is the ideal choice.

2. PEI parts processing has a strong creep strength

PEI polyetherimide is a very classic thermoplastic material, the use of PEI machining to produce a number of different types of aerospace parts can ensure that the molded parts have a strong creep strength. As a result, these parts are less likely to fracture or deform even when working under high pressure and high heat.

3. PEI parts processing has a very high mechanical efficiency

PEI machining is known for its stability, high dimensional accuracy, and high machining balance. Basically all PEI parts processing has a very high mechanical efficiency, but it also has an excellent comprehensive balance of performance and molding processability, so PEI in the machining of molding will still maintain the characteristics of the raw material.

According to network science and technology research shows that PEI machining has crossed the fast lane of high-speed development, especially those who have a reputation for machining is to obtain the praise of many users and praise. PEI machining is widely used in the aviation industry, not only because PEI parts processing has high dimensional stability, but also because PEI parts processing has a strong creep strength and PEI parts processing has a very high mechanical efficiency and so on.