The choice between polyester and epoxy resin determines key properties such as tensile strength, dimensional stability, and tolerance to elevated temperatures. In the Argentine industry, this decision directly impacts the durability of tanks, housings, and structural profiles.
Polyester Resin: performance and cost
Polyester resins offer fast curing and a lower cost per kilogram. They are suitable for high-volume parts where mechanical strength is not critical. However, they exhibit greater shrinkage during curing and lower chemical resistance against aggressive solvents.
Epoxy Resin: superior performance
Epoxy resins, such as those formulated by Ambermere, provide exceptional adhesion to metals and concrete, low shrinkage, and high tensile strength (up to 80 MPa). They are the preferred choice for structural components that must withstand cyclic loads or exposure to chemicals.
| Property | Polyester | Epoxy |
|---|---|---|
| Tensile Strength | 40–60 MPa | 60–80 MPa |
| Curing Shrinkage | 4–8% | 1–2% |
| Chemical Resistance | Moderate | High |
| Gel Time (at 25°C) | 15–30 min | 30–60 min |
Selection Criteria
For molded parts requiring dimensional stability and fatigue resistance, epoxy resin is the technical choice. In applications where cost is the main factor and mechanical demands are low, polyester remains a viable alternative. Ambermere advises its clients on selecting the optimal material according to the requirements of each project.
To obtain detailed technical data sheets or request a sample, contact our engineering team.