Engineering resins are a group of plastic materials that combine great strength with light weight over a wide range of conditions. They are usually chosen for one or more enhanced physical properties; for example, polycarbonate (PC) is known for its impact resistance and polybutylene theraphthalate (PBT) for its dimensional stability. Other characteristics of some engineering resins are high heat resistance, rigidity and chemical stability. Most engineering resins have improved performance at temperatures above 275°F (135°C).

The term “engineering resin” usually refers to thermoplastic materials. Thermoplastics are elastic and flexible above each resin’s specific glass transition temperature. Depending on the temperature, most thermoplastics have a crystalline region (giving it strength and rigidity) and an amorphous region (giving it elasticity). Thermoplastics that do not crystallize are called “amorphous” plastics and are most often used in applications where clarity is important.

Specific gravity	0.0365 lb./in.3 (1.01 g/cc)	0.0365 lb./in.3 (1.01 g/cc)
Melting point	352°F (178°C)	352°F (178°C)
Glass transition temperature	Not Applicable	Not Applicable
Tensile strength at break	Not Available	Not Available
Elongation at break	50%	50%
Hardness durometer (Shore A)	Not Available	Not Available
Hardness durometer (Shore D)	Not Available	Not Available
Water absorption @ 24 hours	1.6%	1.6%
Sterilization	Steam

This material data sheet is presented for reference only. For a specific application and environment, characteristics and performance may vary. Product design and suitability for use are the sole responsibility of Microspec’s customer. Microspec strongly urges customers to consult with the material manufacturer.