contact bonding
An adhesive assembly process which utilizes
adhesives that are dried to the condition where
they display very little adhesive attraction to
each other hut still possess considerable cohesive
attraction and strength properties. When two
surfaces, for example, are coated with an adhesive
and allowed to dry to the point where they no
longer display TACK . they can he
conveniently handled; when the two surfaces are
then joined, however. they immediately attract
each other and cohere, instantly forming a strong
bond. If the two surfaces are allowed to dry for
too great a time, however, the ability to cohere
is destroyed, unless the adhesive is dampened with
a solvent and then allowed to dry once again to
the stage of non-tackiness. This type of adhesive
is used extensively in attaching plastic laminates
to surfaces and is convenient to use in other
applications where immediate bonding is important.
Such contact adhesives are usually based on
synthetic elastomers.
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