PEI of Brown PEI

Parts Plate PEI

I. PEI Description

PEI (polyamide-imide) is an extremely strong and stiff plastic material. It is often used in elevated temperature environments where other thermoplastics and would lose their mechanical properties.PEI is a very dimensionally stable material with an extremely low coefficient fuels, of thermal expansion making it an excellent choice for applications that require machining to tight tolerances.

PEI is available in a variety of formulations including electrical, bearing and wear, and glass-filled  grades. Electrical grade PEI has extremely high dielectric strength and it is often used for applications where it functions as an electrical insulator. Bearing grade PEI can be used for demanding   bearing applications that require extreme loads, speeds, and/or elevated temperatures. Glass-filled PAI has enhanced strength and stiffness. PEI working temperature can reach 250 centi degrees. 

II. PEI Characteristics

Advantages:

1.  Strong and stiff  

2.  Performs well at elevated temperatures

3.  Extremely low thermal expansion

4.  Excellent electrical insulating properties 

5.  Outstanding bearing wear properties

6.  Good resistance to common solvents, and acids

Disadvantages:

1. Easy to damage the characteristics by various chemicals, steam will also allow the rapid decrease of the material properties

2. High hydroscopic property.  If use under 200 centi degrees and require high precision, the materials must be dried before heating. Heating the PAI which own high hydroscopic will occur swelling and become deformed.

 III. PEI Application

1. Semiconductor machinery parts               

2. Bearings and bushings

3. Chip test sockets   

4. Bearing cages

5. Pump and valve parts

6.Seals

7. Electrical connectors

8. Aerospace components