Will carbon fiber panels be subject to defects during curing?

2025-09-08 10:45:00

There are several manufacturing processes for carbon fiber panels, with the most commonly used method being to lay up and cure carbon fiber prepreg. This process produces panels with better and more stable performance, but it also comes with a higher level of manufacturing complexity. The layup of carbon fiber prepreg requires considerable skill and experience, and curing also requires high temperatures and pressures. So, can the panels be used immediately after curing? Will there be surface defects?

The curing of carbon fiber panels is actually done in a hot press. Using a mold as support, the cut and laid-up carbon fiber prepreg is gradually cured under controlled temperature and pressure. This process can take 3-6 hours, or even longer. Surface defects are common after curing carbon fiber panels. The following are some of the more common ones.

1. Void formation: If the curing temperature is uneven or there are bubbles in the resin, voids will form in the carbon fibers. These voids weaken the panel's structure and reduce its mechanical properties.

2. Resin-Rich or Resin-Poor Areas: If the amount of resin in the matrix is uneven, the circuit board may have areas of resin-rich or resin-poor content. Areas with high resin content can lead to a weaker structure and an uneven surface finish, while areas with low resin content can cause dry spots or delamination.

3. Delamination: Delamination occurs if the carbon fiber layers are not properly bonded together during the curing process. This can weaken the circuit board's structure and cause it to fail under load.

4. Wrinkles or Blisters: If the carbon fiber is not properly tensioned during the curing process, wrinkles or blisters can form on the board's surface. These defects can be cosmetic or affect the mechanical properties of the circuit board.

These defects are related to layup techniques, temperature control, pressure control, and time control. Manufacturers with comprehensive equipment, advanced technology, and extensive experience will develop certain rules and techniques to improve yield and overall performance during processing.

How can I remove excess resin from Carbon Fiber Boards?

After curing a Carbon Fiber Sheet, you may notice some excess resin on the surface or cross-sections when removing it from the mold. This hardened resin can be removed from the sheet surface. How can you remove it? Here are a few methods to try.

1. Sanding the Surface: Lightly sand the surface of the Carbon Fiber Sheet with fine sandpaper, being careful not to oversand the carbon fiber. This will help remove excess resin and smooth the surface.

2. Using a Scraper or Blade: For thicker or more stubborn areas of excess resin, carefully remove it with a scraper or blade. Be sure to use a sharp blade and work slowly and carefully to avoid damaging the carbon fiber.

3. Using a Solvent: If the above methods don't work, try using a solvent such as acetone or alcohol to dissolve the excess resin. Apply the solvent to the surface with a cloth or brush, being careful not to apply too much to avoid damaging the carbon fiber. Wipe away any excess with a clean cloth.

Regardless of how you remove excess resin from the surface of the carbon Fiber Sheet, be sure not to damage the sheet itself.