webertec force carbon sheet

Preparation

Before the application of webertec force carbon sheet, the quality of the substrate has to be checked. The tensile strength has to be tested with a pull-off bond test. For load to be transferred from the carbon sheet into the bearing substrate a tensile surface strength of at least 1 N/mm2 is required.

The bearing substrate must be roughened by light grit blasting or sandblasting or grinding. Any unevenness must be tested with a straight edge. Maximum deviation is 5mm per 2 metre.

The edges of the structural member must be rounded by grinding to achieve a minimum radius of 15mm. The substrate must be cleaned of any dust and the moisture content must be less than 4%. Ensure all surfaces are clean and free from any contamination.

Application

webertec force EP primer
The epoxy resin primer must be mixed in accordance with the product data sheet and applied to the prepared substrate. Allow to go tacky - normally up to 2 hours, but do not allow to dry.

webertec force EP bonding adhesive
The epoxy resin adhesive must be mixed in accordance with the data sheet and applied evenly to the primed substrate as a first coat.

Immediately after the adhesive is applied, the first layer of carbon fibre sheet is applied by hand and pressed into the surface with a rubber roller and squeegee.

Another layer of adhesive is applied by brush or roller over the carbon fibre sheet and is pressed into the sheet with a squeegee. Additional layers are applied in the same way onto uncured, wet epoxy resin adhesive.

For the carbon sheet, a wet lay-up lamination process will need to be employed. Pre-wet the sheet with webertec force EP bonding adhesive and place the wetted-out sheet onto the first coat of adhesive. Encapsulate this layer with a second coat of webertec force EP bonding adhesive. For multiple layers repeat the above steps.

For multiple layers of carbon sheet, use the wet lay-up process described above.

Allow the epoxy resin adhesive to fully cure.

Cleaning

Clean tools carefully, using webertec solvent.

Yield

Supplied in 150m length rolls at 300mm width and come with a protective plastic film for ease of handling.

Area coverage is 45m2 per roll.