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Polybutylene Terephthalate (PBT)
Polybutylene Terephthalate is a crystalline, high molecular weight polymer that has an excellent balance of properties and processing characteristics. Because the material crystallizes rapidly, mold cycles are short and molding temperatures can be lower than for many engineering plastics. Source: RTP Company
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Advantages of Polybutylene
Good electrical properties for power components. Moderate to high strength depending on glass fill. Unfilled grades tough and flexible. Good resistance to organic solvents and fuels.
- Copolymer, Random
- Creep Resistance, Good
- Crystalline, Semi
- ESCR, High (Stress Crack Resist.)
- Dispersible
- Homopolymer
- Toughness, Good
- Flexibility, Good
- Food Contact Acceptable
Disadvantages of Polybutylene
Hard to fill thin parts. Glass filled resins very prone to warp. Poor resistance to acids, bases and hydrocarbons. Price is moderate.
Background of Polybutylene
Polybutylene (PB) was first created in 1954, a year after polypropylene. However, the first industrial production was not available until 10 years later under the name Vestolen BT from Chemische Werke HULS, Germany. More recently, Basell Polyolefins has been the primary supplier of PB-1 grades.
Additional descriptive content about Polypropylene can be found on the RTP Company website.
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