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POLYESTER RESINS

Polyester Resins

Polyester resin is most commonly reinforced with glass fibre to produce a material which provides ease of handling, low cost, and dimensional stability. It also offers a great variety of finishes.  It is the least expensive of the resin options.

It can be used in applications ranging from sleek automotive body panels to rugged floor or wall panels. It is particularly well suited to kitchens, bathrooms, and other areas that require washable low-maintenance walls. Its low density makes it up to five times lighter than equivalent metal parts and its strength to weight ratio is very good.

The composite’s strength can be increased or decreased by altering the proportion of reinforcement. Fillers may also be added to extend the value of the resin, reducing the cost of the final composite by as much as 50 percent.

Advantages
- Least expensive option
- Can be tailored to meet a wide range of end-use applications

Limitations
Only moderate mechanical properties 
High styrene emissions in open moulds 
High cure shrinkage Limited range of working times

Processing technologies
The best processes for producing parts with this material are:
- Open moulding
- Resin transfer moulding (RTM)
- Sheet moulding compounds (SMC)

BFG International’s experienced designers and engineers select the optimal process in each case based on variables such as the client’s tooling budget, dimensional tolerance and physical properties of the parts, and production volume. 

​Technical details

Temperature range
- 40 °C to 80  °C
Flexural strength
> 130 Mpa
Flexural modulus
> 9 Gpa
Tensile strength
100 Mpa
Tensile modulus
> 9 Gpa
Density
1.4 – 2 gm /cc
​Moisture absorption
< 0.5 %
​Coefficient of thermal expansion (x10-5)
15 -  30 ppm/deg C

About BFG

For over 40 years, BFG has been a global leader and pioneer in composite design, engineering and manufacturing, with over 2,000 people and 15 production facilities worldwide – and a total commitment to quality and innovation.
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  • Home
  • PRODUCTS
    • Building Envelopes
    • Building Facades
    • Primary Structural Roofs and Ceilings
    • Domes and Cupolas
    • Suspended Ceilings
    • Shading Elements and Screens
    • Interior Architectural Elements
    • Complex Formwork
    • Specialty Architectural Finishes
  • Projects
  • Materials
    • Introduction to composites >
      • What are composites
      • Fire safety performance
      • LEED certification
      • Sustainability and composites
      • History of composites
      • Famous architectural projects
    • Fiber Reinforced Plastic (FRP) >
      • Introduction to FRP Composites
      • Benefits of FRP composites
      • Materials Systems >
        • Matrix Reinforcements >
          • Aramids
          • Carbon fibre
          • E-Glass
          • S-Glass
        • Resin Systems >
          • Polyester Resins
          • Epoxy Resins
          • Phenolic Resins
          • Vinyl Ester Resins
        • Cores
      • Processing Technologies >
        • Open vs Closed Moulding
        • Contact moulding
        • Spray up
        • Light Resin Transfer Moulding (LRTM)
        • Resin Transfer Moulding (RTM)
        • Press moulding
        • Vacuum bagging
        • Vacuum Forming (Thermoforming)
        • Vacuum infusion
        • Sheet moulding compound (SMC)
      • Tooling and Pattern Making
      • Composites in architecture
    • Glass Reinforced Concrete (GRC) >
      • Introduction to GRC
      • Properties of GRC
      • Benefits of GRC
      • GRC in architecture
    • Ultra High Performance Concrete (UHPC) >
      • Introduction to UHPC
      • Benefits of UHPC
      • UHPC in architecture
  • About
    • About BFG
    • Media >
      • ​Media resources
      • Downloads
    • History
    • Certification
    • Careers
  • BFG GROUP
  • Contact