Pressure Sensitive Adhesives (PSAs)
Double-coated paper and film tapes, double coated foam tapes, adhesive transfer
tapes.
There are three primary PSA joining systems used most widely today: double-coated
paper and film tapes, double-coated foam tapes, and adhesive transfer tapes. Each
system offers specific benefits depending upon the surfaces to be joined, the strength
of the bond required and environmental factors, such as temperature, ozone/weathering
and chemical resistance.
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Double-Coated Paper and Film Tapes
Double-coated constructions are designed to join or bond two substrates, and can
be highly customized to meet the end-use requirements. Double-coated paper and film
tapes are made up of a layer of adhesive, a paper or film carrier, another layer
of adhesive, and a release liner. Carriers with adhesive on both sides give double-coated
tapes additional body for greater dimensional stability and easier handling and
dispensing. They also help avoid stretching the rubber extrusion during application
to the substrate.
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Double-Coated Foam Tapes
Double-coated foam tapes are composed of a layer of adhesive, a foam carrier, another
layer of adhesive and a special liner. They are flexible, conformable, and are ideally
suited for filling space and joining rough or irregular surfaces. Double coated
foam tapes also help cushion and dampen noise and vibration. They provide excellent
impact resistance, and can be die cut to match specific applications. Depending
on the foam carrier selected, they can also offer sealing properties, temperature
resistance and can have good insulating qualities. Foam carriers options include
open cell polyurethane, closed cell vinyl, polyethylene, and elastomeric and neoprene
foam formulations.
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Adhesive Transfer Tapes
Adhesive transfer tapes are literally thin ribbons of pressure sensitive adhesive
pre-applied on special release liners. This system allows the user to apply a precise,
clean, dry adhesive to the surface of the seal or gasket. It is frequently a better
alternative to liquid adhesives, hot melts, staples, waxes and other convention
joining methods.