Injection Epoxy Resin
Infusion resins based on epoxy systems are characterized by their low viscosity, excellent wet-out behavior, and mechanical stability. They are suitable for vacuum infusion processes as well as resin injection techniques. In industries such as boatbuilding, mold construction, CFRP and GFRP fabrication, or visual carbon fiber applications, an appropriate 2-component epoxy resin system can support reliable processing and deliver consistent material performance.
Infusion resins for vacuum infusion and injection processes
What are the key characteristics of infusion resin systems?
An infusion resin system is a low-viscosity 2-component epoxy resin, developed specifically for vacuum infusion and resin injection processes. Thanks to its high flowability, it penetrates complex fiber structures and promotes a uniform resin distribution within the laminate. This reduces air entrapment and enables effective fiber wet-out. Compared to polyester or vinyl ester resins, these systems typically exhibit minimal shrinkage, enhanced thermal resistance, and good chemical durability. This makes them suitable for producing dimensionally stable and durable composite components in lightweight construction, marine applications, or visual carbon fiber parts. A well-matched combination of resin and hardener supports process reliability across a wide range of production environments.
Which resin–hardener combinations are available?
HP-Textiles offers a selection of infusion resin systems consisting of the HP-HE3000RI epoxy base combined with various curing agents. Systems such as HP-E30RI, HP-E120RI, and HP-E300RI can be configured using HP-HTE30RI, HP-HTE120RI, or HP-HTE300RI, allowing for a customized pot life of approximately 30 to 300 minutes. Their low viscosity ensures excellent fiber impregnation and even flow characteristics in the laminate. These 2K epoxy systems are suitable for use in both vacuum infusion and resin transfer molding processes. With their combination of adjustable processing times, high optical clarity, and controlled curing behavior, they offer application-oriented solutions for a wide range of composite manufacturing tasks.
How does infusion resin support the manufacturing process?
The vacuum infusion process is considered a resource-efficient method for producing lightweight and structurally robust components. The use of a suitable infusion resin supports optimized resin distribution, a high fiber volume content, and reduced material waste. This contributes to lower scrap rates, consistent part quality, and more sustainable production. With properly adjusted process parameters, even complex part geometries can be manufactured efficiently. In combination with specialized vacuum infusion accessories—such as flow media, sealant tapes, or vacuum films—the resin flow can be precisely controlled and adapted to the application. The targeted use of low-viscosity epoxy resins enables repeatable composite fabrication with a defined fiber ratio and high production reliability.
Where are infusion resin systems typically used?
Infusion resin systems are used in a wide range of technical applications, including mold making, CFRP and GFRP lightweight construction, the automotive sector, wind energy, and boat and yacht building. Depending on requirements for pot life, temperature resistance, or mechanical performance, different system configurations can be selected. The ability to individually adapt a 2K epoxy resin system supports targeted and repeatable processing. Additionally, many systems are suitable for optical or aesthetic components, especially when transparent or non-yellowing epoxy resins are needed—such as for carbon fiber parts with a visible surface finish. Owing to their versatility, infusion resins represent a key material class in advanced composite technologies used in modern industrial production environments.