Glue CFRP with resin or acrylic

The bonding of carbon fiber reinforced plastics (CFRP) is constantly being developed in industrial production. As the adhesive speed plays a major role in aircraft and vehicle construction in addition to durability while maintaining the favorable weight values, today laser-assisted methods are common. In the home and hobby area, epoxy resin adhesive is best.

Epoxy resin or methyl acrylate

When gluing CFRP, two variants are used. Components or workpieces should be connected together or damage should be repaired. In both cases, epoxy resin adhesives are suitable, which usually also form the carrier of CFRP.

Alternatively, two-component methyl acrylate adhesive is commercially available. All adhesives have a short cure time, which requires rapid processing in just a few minutes. In principle, the processing times for epoxy resin adhesives are longer than those for methyl acrylate or acrylic adhesives.

Heating the adhesive dots

Depending on the requirements of the durability of the adhesive bonds or repairs, a pre-treatment of the splices on the workpieces or components increase the stability. The heating of the CFRP surface allows a homogeneous adhesive bond, which ideally leads to a more even distribution of later occurring forces in the material body.

How to glue GRP

  • Epoxy resin adhesive or
  • acrylic adhesive
  • Harder
  • Grease-dissolving cleaning agent
  • microfiber cloth
  • Possibly sandpaper with 200 grit
  • Respiratory and eye protection
  • gloves
  • Eventually hair dryer and / or Bunsen burner

1. Clean

Remove dust and grease residues from the splices. Do not touch the adhesive surfaces after cleaning with your fingertips or other areas of skin.

2. Prepare the splices

If you are working with epoxy glue, heat the splices if possible with a hair dryer or carefully with a Bunsen burner until the surfaces soften and become sticky and glossy. Alternatively and for acrylic or superglue, rough the adhesive surfaces with sand paper on both sides.

3. Mix glue

Mix the two components of your adhesive according to the manufacturer's instructions. After removing the required amount of adhesive, seal the tube airtight again. Pay attention to the right amount, because you have to place the glue and the workpieces in a few minutes.

4. Join workpieces

Firmly press the workpieces or components together and fix them in the desired position. Make sure that no physical force acts on the adhesive bond during the drying process.

Tips & Tricks

If you would like to repair cracks and crevices with adhesive, refer to the manufacturer's instructions for the gap bridging dimension of the adhesive.

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