When laminating CFRP, the air must come out

In order to achieve the optimum properties of CFRP, special attention must be paid to the preservation of the matrix and the complete elimination of trapped air during lamination. For increasing the lateral drawability, lamination with alternately transversely and longitudinally twisted fiber fabrics is possible.

Surface meets surface

When constructing the original model or the negative mold of the later component or workpiece made of CFRP, the main focus should be on the surface. The surface of the CFRP can only succeed as well as it is the used form.

If the negative mold or the master model is also laminated, for example made of fiberglass (GRP), less attention must be given to the structure of the GRP. The smoothness and clean shape of the surface is the only point of contact with the future CFRP component.

Laminated fiber fabric

One of the properties of CFRP is the greater specific strength with respect to the longitudinal length of the tearing than in the transverse direction of the fiber. Therefore, the greatest resistance is achieved by alternately laying by ninety degrees laying the fiber fabric.

How to laminate CFRP

  • Release wax or specific release agent
  • gelcoat
  • epoxy resin
  • Harder
  • carbon fiber fabrics
  • brush
  • vent Roller
  • spatula
  • Respiratory and eye protection
  • gloves

1. Apply a release layer

According to the manufacturer's instructions, first apply the release agent, normally release wax, evenly to the surface of the negative mold or the master model, which acts as a base for the lamination.

Apply gelcoat

Spread the stirred and flowable gelcoat on the release liner and coat it with a uniform thickness. Wait for the gelcoat to gel, which is just before the end of the specified pot life.

4. Apply resin

Fill a layer of resin one to two millimeters thick on the gelcoat and spread evenly from the inside to the outside. For round, sloping or rising surfaces, you must select the maximum viscosity mix.

5. Press fabric mat

Press the first carbon fiber mat onto the liquid resin.

6. Dab matrix

Dab the fiber fabric so that resin slowly penetrates through the pores.

7. "deflate" fibers

Dab with a brush or sweep with the breather roller from the inside out until a uniform penetration and coloration is achieved.

Tips & Tricks

For rounded surfaces, choose the most viscous mixing ratio for gelcoat and resin.

Video Board: Carbon Fiber - The Material Of The Future?