Founded in 2004, Ridge Corporation makes lightweight, continuous glass-reinforced thermoplastic composites and turns them into engineered solutions for transportation and other demanding applications. Based in Ohio, the company combines thermoforming with patented sonic-welding processes, including the integral welded liners that made its PolarX reefer product distinctive. Ridge manufactures more than 22 million pounds of composites each year in 240,000 square feet of Ohio facilities, with products that are 100% recyclable.
ISO Standards
FDA Direct Food Contact Standards
Compliance program
CARB Compliance
Compliance program
SmartWay Verified
Compliance program
California Proposition 65 Compliance
Compliance program
Haysite Reinforced PlasticsFounded in Erie in 1954, Haysite Reinforced Plastics formulates and processes thermoset fiberglass composites for demanding insulation, corrosion-resistant and lightweight structural applications. Its 103,000-square-foot operation combines in-house material formulation, custom molding and pultrusion with a testing laboratory that can validate every product it makes. Now a member of the Isovolta Group, Haysite serves power, transportation and industrial customers in 30 countries.ERIE, PA
Rapid TPCFounded in Pittsburgh in 2013, Rapid TPC manufactures thermoplastic composite parts and develops quick-turn prototypes for customers seeking lightweight, fiber-reinforced components. Its automated matched-die forming process handles complex 3D geometries with cycle times similar to injection molding, while the company’s engineering team helps move designs from material selection through production. Rapid TPC grew from an idea in the Alphalab Gear hardware accelerator into a manufacturer serving production needs from 100 parts to more than 1 million annually.PITTSBURGH, PA
Advanced Composites IncAdvanced Composites grew from two automotive compounders founded in Ohio and Tennessee in the mid-1980s, joining under Mitsui Chemicals in 2003. Nearly four decades later, the company develops thermoplastic materials for North American automakers and their suppliers, with its work recognized by a 2024 SPE Automotive Innovation Award for Rivian exterior cladding.SIDNEY, OH
PlaskoliteFounded in Columbus, Ohio, in 1950 by Donald Dunn, Plaskolite has grown from a plastic-sheet maker into a global manufacturer of engineering thermoplastics. The company pairs large-scale production with customer-specific fabrication and specialized optical molding, including clean, climate-controlled injection molding with presses up to 550 tons. Plaskolite also emphasizes responsible manufacturing, with some sites recycling 50% to 80% of their waste and reducing disposal by more than 70%.COLUMBUS, OH