Mentor’s Polychem Corp. has been acquired by The Sterling Group, an operationally focused middle market private equity firm based in Houston.

Polychem, a manufacturer of polyester and polypropylene packaging products and equipment, is vertically integrated. The company operates a PET recycling facility that processes bales of post-consumer PET and converts them for use in Polychem's strapping extrusion lines and for external sale to consumer packaged goods companies. 

"We look forward to working with Polychem to continue to build on the company's long history of successfully serving customers with quality products and innovative securement solutions," said The Sterling Group Partner Gary Rosenthal.

The Sterling Group has made previous investments in the packaging sector, including Liqui-Box, Exopack and Saxco.