ACA Adhesives Simplifies RoHS Compliance


Akron Coating and Adhesives recently released ACA 161A, a new water based adhesive designed to bond polypropylene (PP) and other engineering plastics to metals such as aluminum. Since the new RoHS rules call for the phasing out of all polyvinylchloride-containing materials (PVCs), Polypropylene is an attractive replacement for plastics that contain PVCs. Use of PP has been limited mainly because it is more difficult to achieve a strong bond to it. In almost all cases, a primer coat is required. Further complicating the transition, most adhesives that are designed to bond PP are solvent-based, and must be diluted and cleaned up with non-environmentally friendly materials. While results will differ depending on how the adhesive is to be used, in many cases ACA 161A can provide a simple, cost-effective way to substitute polypropylene for PVC. Tests have shown that ACA 161A will provide a very strong bond (peel values of up to 32 lb-in.) between polypropylene and aluminum. Unlike most adhesives currently on the market that are used for this purpose, ACA 161A can be applied directly to the materials surface, eliminating the cost and assembly time required for primers. The formula is water-based, which allows for easy clean up. It can be applied to metal foil by gravure printing, reverse roll or wire wound bar coating methods. If necessary, it can also be applied with a brush, paint roller or by spray coating.
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