Polyester Resins
Polyester Resins (Thermoset Materials)
Polyester resin systems are a proven, cost-effective thermoset option for molded components that need strength,
dimensional stability, and reliable performance at production scale. At Zehrco-Giancola, we specialize in manufacturing
polyester-based parts using SMC (Sheet Molding Compound) and BMC (Bulk Molding Compound)—with engineering support
to match material performance to the application.
Looking for a partner that understands both material families? We also support thermoplastic solutions when the application
calls for them—helping teams choose the right system for performance, environment, and volume.
Why Polyester Resins Are Used
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Cost-effective strength Structural performance with efficient material cost. |
Dimensional stability Repeatable geometry and dependable molding results. |
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Electrical & heat performance Well-suited for insulating and heat-exposed applications. |
Complex part design Supports ribs, bosses, inserts, and integrated features. |
How We Manufacture Polyester-Based Components
Most polyester resin parts at Zehrco-Giancola are produced using SMC and BMC systems—engineered to meet structural,
electrical, and environmental requirements.
- SMC (Sheet Molding Compound): Reinforced sheet format that supports high strength, smooth surface finishes, and stable dimensions.
- BMC (Bulk Molding Compound): Molding compound designed for complex shapes and repeatable production with strong mechanical performance.
Our team aligns the resin system, reinforcement strategy, and molding method with your part geometry, performance targets, and production volume.
Common Polyester Resin Applications
- Electrical housings, insulating components, and structural supports
- Industrial covers, panels, enclosures, and protective housings
- Transportation and heavy equipment components requiring durability and repeatability
- Commercial and industrial parts where cost and performance must balance
Cost Considerations
Polyester resin systems are often selected when teams need durable molded parts at an efficient material cost—especially in
applications that benefit from the repeatability and design flexibility of SMC/BMC molding.
Technical Snapshot
- Material family: Thermoset
- Primary formats: SMC and BMC
- Typical advantages: Strength-to-cost value, stable dimensions, good electrical performance
- Design considerations: Ribbing, wall thickness, fiber orientation, surface finish requirements
- Process support: Engineering guidance for material selection and manufacturability
Related Materials
Explore Additional Thermoset & Thermoplastic Solutions