Question 1

What is woven carbon fiber prepreg?

Accepted Answer

Woven carbon fiber prepreg is a carbon fiber fabric that has been pre-impregnated with a controlled amount of epoxy resin. It is ready for molding and is widely used for lightweight, high-strength, and premium carbon fiber composite parts.

Question 2

What woven fabric specifications are available?

Accepted Answer

Available woven prepreg options include 1K, 3K, 6K, and 12K carbon fiber fabrics. Different tow sizes can be selected according to appearance, strength, weight, drapability, and cost requirements.

Question 3

What applications is woven carbon fiber prepreg suitable for?

Accepted Answer

It is suitable for automotive exterior parts, carbon fiber decorative parts, sports equipment, drone components, bicycle parts, industrial composite parts, and heat-resistant composite components.

Question 4

What are the main advantages of woven carbon fiber prepreg?

Accepted Answer

It offers balanced mechanical properties in both warp and weft directions, clear carbon fiber texture, good surface quality, excellent drapability, stable resin content, and strong process compatibility.

Question 5

What are the tolerances for areal weight, thickness, and other parameters?

Accepted Answer

For standard products, common fiber areal weight options may include 150+/-3 g/m2 and 200+/-3 g/m2. Resin content can typically be controlled at 33+/-2% or 42+/-2%, with resin content uniformity controlled within 0.5%.
Thickness tolerance depends on fabric style, resin content, lay-up design, molding pressure, and curing conditions, so the final thickness tolerance should be confirmed according to the product specification or customer requirement.

Question 6

Can the areal weight and resin content be customized?

Accepted Answer

Yes. Fiber areal weight, resin content, width, length, and fabric structure can be customized according to customer requirements, allowing the prepreg to match different product designs and molding processes.

Question 7

Is woven carbon fiber prepreg suitable for visible carbon fiber parts?

Accepted Answer

Yes. Especially 3K twill woven prepreg provides a clear and premium carbon fiber texture after molding, making it ideal for visible carbon fiber parts such as automotive exterior trims, decorative panels, and high-end sports equipment.

Question 8

What thermal performance does the product offer?

Accepted Answer

After proper curing, the material can achieve a glass transition temperature of Tg >=155 celsius, providing good dimensional stability and mechanical performance in elevated-temperature environments.

Question 9

What mechanical properties can woven prepreg achieve?

Accepted Answer

For selected 3K woven prepreg grades, tensile strength in both warp and weft directions can reach >=690 MPa, while compressive strength in both directions can reach >=550 MPa. Final performance depends on the fabric style, resin system, lay-up design, and curing process.

Question 10

How does the product help improve molding quality?

Accepted Answer

The resin system provides suitable flow and tack, helping improve fiber impregnation and reduce dry spots, resin-starved areas, air bubbles, and resin accumulation. This contributes to better surface quality and more stable finished parts.

Question 11

Which molding processes are compatible with woven carbon fiber prepreg?

Accepted Answer

The product is compatible with multiple composite molding processes, including autoclave molding, compression molding, hot-press molding, and bladder-assisted hot pressing.

Question 12

What is the recommended curing condition?

Accepted Answer

The prepreg is designed for medium- to high-temperature curing. Molding conditions can typically be selected within 125-175 celsius, depending on the resin system, part thickness, mold structure, and equipment capability.

Question 13

Can post-curing improve heat resistance?

Accepted Answer

Yes. For applications requiring higher thermal stability, a separate post-curing process after demolding can be applied to further enhance the heat resistance and long-term performance of the finished composite part.

Question 14

What are the storage conditions and shelf life?

Accepted Answer

The prepreg should be stored in sealed packaging and kept away from moisture, dust, and direct sunlight. Typical storage life is:
At 22 deg C / room temperature: approximately 1 month
At 0 deg C: approximately 3 months
At -18 deg C: approximately 6 months
For certain grades or special packaging conditions, extended frozen storage life may be available. The final shelf life should follow the specific product TDS.

Question 15

What precautions should be taken before use?

Accepted Answer

Before opening the package, allow the prepreg to return to room temperature while still sealed to avoid moisture condensation. After opening, keep the material clean, avoid contamination, and reseal unused material promptly. Under sealed room-temperature conditions with relative humidity below 65%, the prepreg can provide good handling stability for production use.

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