Revision 1. 6
1.12
General
1
Glued Bonds
Cyanoacrylate-based glues (super glue) and epoxy resin show superior adhesion on various materials
and are used to bond plastics, metals, wood, glass, concrete, ceramics, etc.
The strength of a glued bond is determined by the following glue properties:
the strength of the adhesive
(cohesion)
its “stickiness” on surfaces
(adhesion)
Preparing the Surface
The bonding surfaces are cleaned in order to remove any adhering foreign matter, such as dirt, rust,
scale, paint, varnish, etc. The most common method of cleaning is by mechanical means (sanding
and brushing). Even for less severely loaded bonds cleaning the surfaces is essential in order to
achieve the desired bond strength, given that foreign matter is often the root cause of bond failure.
For this reason, peel-plies are applied on most bonding surfaces of the Silence. These
fabrics, which are marked by a blue or red thread, are pulled off by hand. The resulting
rough surface is ideal for bonding. After pulling off the peel-ply, do not touch or soil the
bonding surfaces.
Fitting
This step involves the removal of burrs and, in the case of large bonding surfaces, the parallel
alignment of the bonding surfaces of the parts.
Degreasing
Use organic solvents or hot (approx. 60-80°C [140-176°F]) water containing 1%-3% of a liquid
detergent to degrease surfaces. However, bear in mind that some detergents, e.g. dish-washing liquid,
can contain small quantities of silicone compounds, which as residues can prevent the glue from
wetting the surfaces properly.
Manual lamination: carbon-
aramid fabric being
impregnated with epoxy resin