Epoxy Pultrusion System (High-Speed Continuous Profile Grade)
Key Features
- Higher Tg (120-160°C) vs. polyester pultrusion systems (80-100°C)
- Better adhesion to carbon fiber sizing for CF-pultruded profiles
- Extended bath pot life (6-24h) for continuous production
- Compatible with E-glass, S-glass, carbon, and basalt fibers
- Low volatile content — reduced workplace emissions
Epoxy Pultrusion System is a two-part formulated epoxy resin/hardener designed for continuous pultrusion of high-performance fiber-reinforced profiles. Unlike polyester pultrusion systems, epoxy pultrusion provides superior mechanical properties (tensile modulus >40 GPa with carbon fiber, flexural strength >800 MPa), better adhesion to both glass and carbon fiber sizing systems, and significantly higher service temperature (Tg 120-160°C vs. 80-100°C for polyester), enabling structural profiles for construction, electrical, and industrial applications requiring high performance.
The epoxy pultrusion system is formulated for compatibility with heated die temperatures of 130-180°C with a fast-cure mechanism at die entry and controlled gel/cure progression through the die length. Pot life in the impregnation bath is 6-24 hours at ambient (20-25°C) to prevent premature cure and resin starvation in the bath. Pull force is minimized through die surface treatment compatibility and controlled gel timing.
Primary applications include structural pultrusion profiles for construction (I-beams, channels, angles for building structure), electrical-grade pultrusion tubes and rods (non-conductive structural supports, cable ladders), carbon fiber-reinforced electrical transmission line profiles (conductor spacers, cross-arms), and high-precision pultrusion components for aerospace and industrial equipment. The system is compatible with E-glass, S-glass, carbon fiber (standard and spread-tow), and basalt fiber reinforcements.
Specifications
| Parameter | Value |
|---|---|
| Pull Speed | 0.5-3.0 m/min (grade dependent) |
| Tg (cured) | 120-160°C |
| Die Temperature | 130-180°C |
| Pot Life (25°C) | 6-24 hours |
| Bath Viscosity (25°C) | 500-2,000 mPa·s |
| Tensile Modulus (CF-pultruded) | >40 GPa |
| Flexural Strength (GF-pultruded) | >600 MPa |
Applications
FAQ
Epoxy pultrusion is more challenging than polyester for three reasons: (1) Slower reaction kinetics — epoxy amine systems cure more slowly than peroxide-initiated polyesters, requiring higher die temperatures (150-180°C vs. 130-150°C) or longer die residence time (lower pull speed); (2) Higher adhesion to die — epoxy has stronger adhesion to steel die surfaces compared to polyester, creating higher pull forces; internal die release agents or die surface treatment (PTFE-coated dies, release wax application) are required; (3) Higher viscosity — standard epoxy (800-2,000 mPa·s) is more viscous than styrene-diluted polyester (200-600 mPa·s), requiring preheat of resin for bath viscosity reduction. Despite these challenges, epoxy pultrusion is preferred for carbon fiber and high-performance glass fiber applications where superior mechanical properties justify the process optimization effort.
Direct Contact
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