We refere to Nelcote E-763 as a 3K woven carbon reinforced prepreg with a high modulus and strength. We ensure the excellent mechanical properties of this epoxy by using the highest quality raw materials available in the prepreg industry. We can use this material for either wet or dry areas.
The carbon content and density influence the mechanical properties of the prepregs. Nelcote E-763 Epoxy Prepreg is a high-performance prepreg that can be helpful in various applications. It offers outstanding tensile strength and is available in extremely large widths, up to three full sheets. This material can be beneficial for either wet or dry areas. Nelcote E-763 Epoxy Prepreg is helpful in automotive and aerospace applications where we need high tensile strength or stiffness.
This is because it offers outstanding tensile strength and is available in extremely large widths, up to three full sheets.
What is Twill Carbon Reinforced?
The Twill weave consists of a series of X-shaped cables (laid in alternating directions) on the diagonal instead of the regular weave, which consists of a series of straight and parallel lines.
Interlacing successive layers of fiberglass develop the Twill structure in the longitudinal direction. The carbon fiber yarns are then woven back and forth over the diagonals. We repeatedly repeat this to create a very strong material with higher tensile strength than woven carbon fiber.
What’s Special About Epoxy Prepregs?
The prepreg can be produced from high-grade fibers, like aramid and glass fiber resins, thus offering higher tensile strength than traditional fabrics. Prepregs are being used more and more by Rayming PCB & Assembly since they show much better performance than woven fabrics.
We can do webbing, sleeves, and other types of weaving from prepregs to obtain custom-shaped parts that are not possible with woven fiber fabrics.
What are the Benefits of Epoxy Prepregs?
The epoxy prepreg composite’s tensile strength is higher than the tensile strength of traditional fabrics, such as spun-bonded polypropylene. In addition, the flexibility and water resistance (up to 60 minutes) obtained by using this material can allow for custom manufacturing processes in aerospace applications.
1. Good low-pressure consolidation:
Epoxy prepregs exhibit good low-pressure consolidation. The high air pressures will not damage the materials. It can be a problem when using other types of fibers. In addition, this material has excellent dimensional stability, which is essential in applications like bonding or adding reinforcements to various parts of aircraft.
2. Good oxidation resistance:
The epoxy prepreg composite has excellent oxidation resistance and shows no embrittlement over time. This material offers superior resistance to oxidation compared to natural fibers or urethane resins.
3. Excellent handling characteristics and out-time
We can fabricate epoxy prepregs on various production equipment, including conventional fiberglass layup tools. In addition, these materials offer excellent handling characteristics and have a high out-time for composite parts.
4. High strength and elongation to break:
Epoxy prepreg composite material is well suited for aerospace applications due to its high strength and elongation to break. This material also has excellent temperature resistance, with some epoxy resin systems able to withstand temperatures up to 200°C (392°F).
5. 250°F cure epoxy system
A 250°F cure epoxy system is available to meet the requirements of BFRAP type certification. This system is a unique prepreg with low out-time and significantly improved dimensional stability.
6. 3K Carbon prepreg material
Combining the high modulus, low density, and high tensile strength of the 3K carbon fabric ensures that load transfer applications are possible.
7. Clear surface finish for an excellent cosmetic appearance on finished parts
We can obtain a clear surface finish on the parts using a cold-curing system. This improves the structure’s visual appeal and makes it very clear, which is not possible using other types of tools.
8. Low CTE (coefficient of thermal expansion)
The low coefficient of thermal expansion makes this material much more suitable for applications where temperature fluctuations occur over a wide range.
Physical Properties
The physical properties of epoxy prepregs are dependent on the resin system. The tensile strength and elongation to break values presented below are typical values obtained using the MCS matrix with low-density carbon cloth. The volatiles in the resin system reduces to a minimum in the MCS matrix. The MCS matrix is a “lightweight” epoxy resin system with low prepreg density.
Mechanical Properties
The carbon content and density influence the mechanical properties of epoxy prepregs. The mechanical properties of this material are higher than the properties of woven fabrics and most other types of prepreg materials.
1. Tensile Strength, Yield:
The tensile strength and yield values of epoxy prepregs are similar to woven fabrics, but they exhibit much better elongation to break. As a result, the material’s mechanical performance is superior compared to other non-woven fabric resins.
2. Tensile Modulus:
The modulus for the material is higher than that of woven fabrics and most other types of prepreg materials. This feature makes the epoxy prepregs material more adaptable to custom manufacturing processes.
3. Flexural Strength
The flexural strength is better than that of woven fabrics and most other types of prepreg materials. The material is also able to withstand high degrees of elongation without damage.
4. Flexural Modulus:
The flexural modulus is higher than that of woven fabrics and most other types of prepreg materials. This feature makes the epoxy prepregs material more adaptable to custom manufacturing processes.
5. Compressive Strength
The compressive strength is higher than that of woven fabrics and most other types of prepreg materials.
6. Compressive Modulus:
The compression modulus is higher than that of woven fabrics and most other types of prepreg materials. This feature makes the epoxy prepregs material more adaptable to custom manufacturing processes.
Processing Properties
The properties of the epoxy prepregs are superior to those of woven fabrics and most other types of prepreg materials. The processability is comparable to woven fabrics, except this material doesn’t need to be wetted out before processing. In addition, the difference in surface conditions between the two materials does not affect processing since we process the fabric in a deckle-less manner.
1. Gel Time and Heat Build-up: The gel time of epoxy prepregs is intermediate between woven fabrics and most other prepreg materials. The material does not require an extended period for the resin to reach the desired viscosity. In addition, this material exhibits a low heat build-up during cure. This makes it possible to use short cycle times in large lamination processes where we complete the cure at the end of the lamination process.
Applications
Epoxy prepregs are suitable for many aerospace applications, including:
Recreational Applications
Most recreational craft such as personal watercraft, sailboats, and canoes utilize epoxy surfboards to construct the hull. These boards are very lightweight and have superior strength compared to glass fiber surfboards. Ester resin-based epoxy prepreg is also helpful to construct kayaks because it is a material that is highly resistant to damage, has good stiffness, and has low weight.
Industrial Applications
Industrial applications of epoxy prepregs include the manufacture of tooling, molds, and fixtures. Since this material has a low heat build-up and can withstand high degrees of elongation without damage, it is suitable for large lamination processes. This material also has applications in constructing components that require high stiffness, low weight, and good thermal properties.
Conclusion
The Japan Epoxy Resins Association (JERA) classified the prepregs as an environmentally friendly material because of their low environmental impact. In addition, the epoxy prepregs have excellent mechanical properties, chemical resistance, and the ability to withstand high temperatures.
The Japan Epoxy Resins Association (JERA) classified the prepregs as an environmentally friendly material because of their low environmental impact. In addition, the epoxy prepregs have excellent mechanical properties, chemical resistance, and the ability to withstand high temperatures.
