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EPOXY RESINS

Epoxy Resins

Epoxy resins have a well-established record in a wide range of composites parts as well as in concrete repair. Epoxies are used primarily for fabricating high-performance composites with superior mechanical properties, resistance to corrosive liquids and environments, superior electrical properties, good performance at elevated temperatures, good adhesion to a substrate, or a combination of these benefits. Surfaces of epoxy resin composites are not cosmetically appealing, so the material is a good choice in applications where functional requirements outweigh aesthetic ones.

It can be used in applications ranging from sleek automotive body panels to rugged floor or wall panels. Its high strength & modulus behavior makes it a good choice for paneling of structural nature. Its low density makes it up to five times lighter than equivalent metal parts and its strength to weight ratio is very good.

The structure of the Polymer can be engineered to yield a number of different construction products with varying levels of performance. A major benefit of epoxy resins over polyester resins is their reduced shrinkage upon curing. Epoxy resins can also be formulated with different materials or blended with other epoxy resins to achieve specific performance features. Its properties and benefits can be further enhanced when used in conjunction with carbon fibre.

Advantages
- Outstanding electrical insulation 
- High temperature and chemical resistance
- Excellent adhesion to reinforcements
- Extremely low shrinkage
- Almost no odour

Limitations
- Epoxy resins do not have particularly good UV resistance
- Since the viscosity of epoxy is much higher than that of most polyester resins, a post-cure (elevated-heat) process is often required to obtain ultimate mechanical properties
- Epoxies do not produce cosmetically appealing finishes, so they are best used in applications where functional requirements outweigh aesthetic ones

Processing technologies
Epoxies are compatible with most composites manufacturing processes particularly: 
- Vacuum infusion
​
- Vacuum bagging
- Compression moulding
- Hand lay up

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. 

Typical GRP laminate

Temperature range
- 40 °C  –  120 °C
Flexural strength
> 12 Gpa
Flexural modulus
 > 250 Mpa
Tensile strength
> 15 Gpa
Tensile modulus
0.6 – 0.7 Msi
Density
1.2 – 1.5 grams/cc 
​Moisture absorption
< 0.5%
​​Coefficient of thermal expansion (x10-5)
12 -18 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