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PBT Polyester (Polybutylene Terepthalate)
- Jul 30, 2015
- By elitemedicalmolding
- In Plastic Materials
- Comments Off on PBT Polyester (Polybutylene Terepthalate)
PBT polyesters are semi-crystalline. They are versatile materials with a good range of properties. They have excellent electrical properties and are abrasion resistant. PBT has been extensively compounded giving a very wide range of properties. PBT performs much like Nylon but can handle higher temperatures and does not absorb moisture. PBT has excellent impact strength but is very notch sensitive. PBT is very anisotropic in shrinkage, so it is difficult to mold to extremely tight tolerances.
Applications: Industrial equipment applications, business equipment, automotive housings-under the hood, power tool casings.
Advantage
Good flow
Tough
Hydrollysis Resistant
High Impact
Easily Processed
Disadvantage
Low Max. Use temperature
Lower Stiffness than similar PET
Lower Strength than similar PET
Attacked by Strong Bases
Good flow
Tough
Hydrollysis Resistant
High Impact
Easily Processed
Low Max. Use temperature
Lower Stiffness than similar PET
Lower Strength than similar PET
Attacked by Strong Bases
Tensile Strength | Flexural Modulus | Impact Strength | Max Temp. | Chemical Resistance |
---|---|---|---|---|
6,000-13,000 psi | 300,000-1,200,000 psi | 1 ft-lb/in notched izod | 250°-420° F | Fair to Good |