Dinesol Plastics was was acquired by Steel City Manufacturing Company in 1989. Steel City Manufacturing Company, founded in 1939 by Murray Fibus, began as a successful metal stamping company, which specialized in producing various steel products. As it grew throughout the 40s, 50s, and 60s the company was looking to expand. In the mid 1970s Steel City Corporation began to seek out a custom injection molder to stay competitive as a growing plastics industry threatened the share of their metal stamped products. Steel City Corporation had a focus on vertically integrating an injection molding company, which led to the purchase of Dinesol Plastics by Ken Fibus in 1989. Ken Fibus, son of Murray Fibus, spearheaded the growth of the Steel City Corporation during this era.

Dinesol Plastics, established in 1976, was a small plastic injection molding company operating in a 12,000 square foot facility located in West Farmington, Ohio. Soon after Steel City acquired Dinesol Plastics the operation was moved to Niles, Ohio where a 50,000 square foot facility was built. This location became home for the pre-existing machines as well as the addition of several larger machines. To support regional demand, Dinesol again expanded the manufacturing facility in 1995 to 150,000 square feet and added 20 injection molding machines. The company continued its strong growth pattern throughout the 90s and early 2000s. Today, Dinesol Plastics has grown and evolved into one of the nation’s premier custom injection molding service providers. Currently, the company occupies two injection molding facilities totaling over 500,000 square feet. Dinesol operates 50 custom injection molding machines ranging from 17 to 3,000 tons and employs nearly 400 employees. Now under the guidance of its third generation, Dinesol Plastics continues to thrive off of the same entrepreneurial spirit and historic core values that founded the company nearly 80 years ago.