A couple of plastic packaging companies owned by private investment firm Graham Partners are merging into a single entity.

Comar LLC is merging with Convergence Packaging Holdings LLC effective immediately, with current Comar CEO Michael Ruggieri tapped to lead the combined operations. Ross Bushnell, CEO of Convergence Packaging, becomes president and chief commercial officer of the larger firm.

Adam Piatkowski, managing principal at Graham Partners of Newtown Square, Pa., had this to say about combining the two companies:

“Together, they help further our vision of building a leading mid-sized plastic packaging manufacturer,” he said in a statement. “We believe that there are tremendous growth opportunities that will come with the expanded geographic reach, the significant health and wellness market presence, and the combined business development and customer service capabilities.”

Comar serves the pharmaceutical, diagnostic, health and personal care markets from manufacturing locations in Buena, N.J., and Cayey, Puerto Rico.

Convergence Packaging, itself, was created through the acquisition of three companies — Scandia Plastics LLC, Paradigm Packaging Inc., and Precision Medical Inc. It has operations in Rancho Cucamonga and Upland, Calif., Saddle Brook, N.J., and Hoschton, Ga. Convergence serves the health and nutrition, medical diagnostics, food packaging, household and light industrial markets.

The company will be based in Buena.