webertec force aramid sheet

Preparation

Before the application of the S&P aramid sheet, the quality of the substrate has to be checked. The surface tensile strength of the substrate has to be tested with a pull-off bond test. For load transference into the aramid sheet, the substrate needs to be sound and dust free.

Minimum surface tensile strength is 1N/mm2.

The substrate must be roughened by light grit blasting or sand blasting or grinding to remove any surface contamination and surface cement laitance. The flatness of the substrate must be checked with a straight edge, maximum deviation shall be 5 mm over a 2 metre straight edge. Any blow-holes or depressions must be filled with webertec EP structural adhesive, prior to application of webertec force aramid sheet.  

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 touch-dry – normally up to 2 hours.

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 aramid 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 first layer and is pressed into the sheet with a squeegee. Additional layers are applied in the same way onto uncured, wet epoxy resin adhesive.

For multiple layers, use the wet lay-up process. Pre wet the aramid sheet with webertec force EP bonding adhesive and place the wetted-out sheet onto the first coat of adhesive.

Roller and squeegee into position, taking care to align the fibres correctly.

Encapsulate this layer with a second coat of webertec force EP bonding adhesive.

Allow the epoxy resin adhesive to fully cure.

Cleaning

Clean tools carefully, using webertec solvent.

Yield

Supplied in 100m long rolls at 300mm width.

Area coverage is 30m2 per roll.