Polyester (PET)

Polyester is formed when polyester is combined with diacids and diols. This combination produces a resin that retains its strength, clarity, and mechanical properties. Polyester’s versatility and flexibility makes it an effective choice for high-volume, low-cost parts as well as critical, more expensive component parts. One of the most popular copolyesters on the market today is Eastman’s Tritan.

Common Uses:

• Infant Products: Reusable bottles, pacifiers, sippy cups, bottle sterilizer lids
• Appliances: flour care, dishwasher parts, refrigerator ice buckets, refrigerator inside doors, small and large applicance parts
• Medical devices
• Consumer industry: housewares, furniture, bags, film

Physical Properties:

• Specific Gravity - 1.17 g/cm
• Tensile Strength - 6380 psi
• Flexural Strength - 9570 psi
• Impact Strength - 2.36 ft-lb/in

General Properties:

• High temperature resistance
• Easy processing
• High impact resistance
• Excellent clarity
• Excellent toughness
• High chemical resistance
• Some grades FDA approved

Processing:

• Injection Molding
• Extrusion