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Glossary » Materials » Polymers » Polyetherimide » 30% Glass Fiber Reinforced

30% Glass Fiber Reinforced PEI is a subcategory of Polyetherimide. The additative is added by weight during the manufacturing process. Its elastic modulus ranges from 1300 to 1600 MPa. Its flexural modulus ranges from 1200 to 1300 MPa. Its tensile strength ranges from 23200 to 28500 MPa at break. Its compressive strength ranges from 23500 to 30700 MPa. Its Izod Impact strength ranges from 1.7 to 2 J/cm. Its elongation at break ranges from 2 to 5 %. Its hardness ranges from 114 to 125 Rockwell M. Its specific gravity ranges from 1.49 to 1.51. Its coefficient of thermal expansion ranges from 20 to 21 x 10^-6/°C. Its molding pressure ranges from 10 to 20 MPa.

Polyetherimide, also known as PEI, is a thermoplastic polycondensate. The most common trade name is Ultem. PEI is in many ways similar to PEEK, but is cheaper, less temperature-resistant and lower in impact strength. PEI resins are commonly used in medical and chemical instrumentation due to their heat resistance, solvent resistance and flame resistance.