Wind Turbine Blade Pultrusion Epoxy Resin
725-EP2002A&725-EP2001B Wind Turbine Blade Pultrusion Epoxy Resin is a two-component modified epoxy system specially developed for glass fiber pultrusion applications. It offers excellent flowability, fiber wettability, demoulding performance, long processing time, and outstanding thermal and mechanical properties after curing. It is widely used for manufacturing wind turbine blade beam plates and other high-performance composite profiles.
Product Description
725-EP2002A&725-EP2001B is a two-component modified epoxy resin system designed for glass fiber pultrusion processes and high-performance composite manufacturing.
The system consists of 725-EP2002A modified epoxy resin and 725-EP2001B modified anhydride curing agent, providing excellent processing stability, smooth resin flow, and reliable mechanical performance for continuous composite production.
With its excellent fluidity, good glass fiber wettability, outstanding demoulding performance, and long operation period, this epoxy resin system helps manufacturers achieve stable pultrusion production and high-quality composite profiles.
After curing, the resin provides excellent thermal stability, mechanical strength, and dimensional stability, making it particularly suitable for structural composite components such as wind turbine blade beam pultrusion plates.
Product Advantages
Excellent Flowability for Pultrusion Processing
725-EP2002A&725-EP2001B has optimized viscosity characteristics, allowing smooth resin impregnation during continuous pultrusion processes and ensuring uniform wetting of glass fibers.
Superior Glass Fiber Wettability
The resin system provides excellent compatibility with glass fiber reinforcement, improving resin penetration and helping produce composite profiles with consistent mechanical performance.
Long Processing Window
The system offers a long gel time, providing sufficient processing time during pultrusion production and improving manufacturing efficiency.
Excellent Demoulding Performance
The cured resin system provides good release characteristics, helping reduce production interruptions and improve continuous pultrusion operation.
High Thermal and Mechanical Performance
After curing, the resin delivers:
- High glass transition temperature
- Excellent tensile strength
- Good flexural strength
- High modulus
- Low shrinkage
making it suitable for structural composite applications requiring long-term durability.
Applications
725-EP2002A&725-EP2001B pultrusion epoxy resin is mainly used in:
Wind Energy Industry
- Wind turbine blade beam plates
- Pultruded blade reinforcement components
- Structural composite profiles
Composite Manufacturing
- Glass fiber pultrusion products
- Fiber reinforced polymer (FRP) profiles
- High-strength composite components
Other Applications
- Industrial pultrusion structures
- Lightweight composite materials
- Continuous composite manufacturing
Technical Properties
Component A: 725-EP2002A Modified Epoxy Resin
| Property | Unit | Value |
|---|---|---|
| Appearance | - | Colorless transparent syrupy liquid |
| Viscosity (25℃) | cP | 8000-12000 |
| Density (25℃) | g/ml | 1.1-1.3 |
| EEW | g/eq | 176-192 |
| Storage Life | Month | 12 |
Component B: 725-EP2001B Curing Agent
| Property | Unit | Value |
|---|---|---|
| Appearance | - | Light yellow clear liquid |
| Viscosity (25℃) | cP | 100-300 |
| Density (25℃) | g/ml | 1.1-1.3 |
| Storage Life | Month | 12 |
Mixed Resin Properties
Mixing Ratio: 725-EP2002A : 725-EP2001B = 100 : 105 ±2
| Property | Unit | Value |
|---|---|---|
| Mixed Viscosity (25℃) | cP | 500-1100 |
| Density | g/ml | 1.1-1.3 |
| Gel Time (25℃) | h | ≥12 |
| Gel Time (150℃) | s | 40-100 |
Cured Resin Performance
Curing Condition: 1h @100℃ + 1h @150℃ + 3h @180℃
| Property | Unit | Value |
|---|---|---|
| Tg (Teig) | ℃ | ≥95 |
| Tg (Tmg) | ℃ | ≥100 |
| Tensile Strength | MPa | ≥60 |
| Tensile Modulus | MPa | ≥2700 |
| Fracture Elongation | % | ≥4.0 |
| Flexural Strength | MPa | >100 |
| Flexural Modulus | MPa | ≥2700 |
| Volumetric Shrinkage | % | ≤5 |
Processing Guidelines
Mixing Ratio
Recommended ratio:
725-EP2002A : 725-EP2001B = 100 : 105 ±2 (by weight)
Mixing Procedure
To achieve designed performance:
- Accurately weigh resin and curing agent.
- Mix thoroughly for at least 2 minutes.
- Ensure complete mixing at container corners and bottom.
- For automatic mixing equipment, regularly check and adjust the feeding ratio.
Recommended Pultrusion Curing Process
Recommended mold temperature:
| Zone | Temperature |
|---|---|
| Zone I | 150-160℃ |
| Zone II | 190-200℃ |
| Zone III | 190-200℃ |
Storage and Packaging
Packaging
725-EP2002A Resin
- 220 kg sealed drums
725-EP2001B Hardener
- 200 kg sealed drums
Storage Conditions
- Temperature: 10℃-40℃
- Store in dry environment
- Keep containers tightly sealed
- Avoid moisture exposure
The curing agent is humidity sensitive and may absorb moisture from the environment. Proper sealing after opening is required to maintain product performance.
FAQ
1. What is pultrusion epoxy resin used for?
Pultrusion epoxy resin is mainly used for continuous manufacturing of fiber reinforced composite profiles, including wind turbine blade structural components and glass fiber reinforced products.
2. Is this epoxy resin suitable for wind turbine blade manufacturing?
Yes. 725-EP2002A&725-EP2001B is specifically designed for pultrusion production of wind turbine blade beam plates and other structural composite components.
3. What are the advantages of this pultrusion epoxy resin?
It provides excellent fiber wettability, good flowability, long processing time, high thermal stability, and excellent mechanical properties after curing.
4. What reinforcement materials can be used with this resin?
This epoxy resin system is mainly suitable for glass fiber reinforcement and other fiber reinforced composite materials.
5. What is the mixing ratio of this epoxy resin?
The recommended mixing ratio is 100 parts 725-EP2002A resin component to 105 parts 725-EP2001B curing agent by weight.
