Equipment Considerations

Equipment Considerations

The performance of solvent-based adhesives is largely determined by the polymer system used in the formulation. The choice of adhesive type depends on the specific substrates and environmental resistance needed – temperature resistance, oil and plasticiser resistance, etc. Most solvent-based adhesives contain flammable solvents, which require proper precautions for safe handling. In addition, many organic solvents are regulated due to environmental concerns with emissions.

Within each type of solvent-based adhesive, formulations are available to match the application requirements of the process – brush, roll, bead, ribbon or spray. Once the adhesive is applied, the solvent evaporates relatively quickly, causing an increase in viscosity of the adhesive film. Bonds can be made immediately after adhesive application or after some solvent has evaporated, but before the adhesive has dried to the point where it will no longer wet (open time). Waiting for some evaporation prior to bonding (set time) increases the initial strength of the adhesive bond and allows assemblies to be processed more quickly.

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