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PTFE Adhesive * Newsletter 2014-03

PTFE Adhesive with uncomplicated handling

THOMASANN® PTFE Adhesive is a two-component adhesive based on synthetic rubber (contact adhesive). It is suitable for quick, uncomplicated and reliable bonding of parts made of PTFE to other materials.

The adhesive provides immediate bonding and thus enables application even on ceilings and vertical surfaces. However, a correction of the adhesion is not possible anymore. The adhesive is highly inflammable and should therefore be kept away from open fire. It is resistant to water, gasoline, diluted acids and alkalis. The temperature limits of the adhesion range from -30 °C to +85 °C. An immediate subsequent treatment of the glued parts is possible, but the final strength is achieved only after 48 hours.

A pretreatment of the surfaces by mechanical roughening or by chemical etching of the bonding surfaces is necessary for achieving a good adhesion of PTFE. It is important that the surfaces to be bonded are metallic bright and free of residues like oils, fats, rust, tinder or coats of paint before application of the adhesive.

Before bonding, the surfaces to be bonded should be deep cleaned with a suitable solvent to remove dirt, oil and fat. Suitable grease solvents are acetone, trichloroethylene, perchloroethylene, methyl chloride etc., but not gasoline, alcohol or paint thinners, which leave residues after evaporation.

The best bonding results are obtained by applying of the adhesive on both parts and with the adhesive layer thickness of 0.1  - 0.15 mm. The parts to be bonded need to be held under pressure while the adhesive cures. The pressure can be generated e.g. by loading with weights or by special clamping tools etc. The clamping pressure should not be altered during the curing of the adhesive, otherwise the bonding strength is insufficient.

Further specifications can be found:
PTFE Adhesive

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