Adhering to Difficult Substrates With silicone Adhesives

摘要

Adhesive technology is equal parts chemistry and "black magic." The sheer number of available substrates makes it nearly impossible to test each adhesive on every type.However,by conducting tests on a selection of novel,or diffi-cult-to-adhere-to,substrates,we can make inferences that may help narrow the choice of adhesives.'Adhesion' is best defined as the chemical bonding of two substrates.Substrates with reactive groups available for bonding - like OH groups on glass and aluminum - make this chemical bond easier to achieve.Substrates with nothing to react to,such as graphite and Polytetrafluorethylene (PTFE),make adhesion difficult,while most other substrates fit somewhere between the two extremes.