Founded in central Ohio in 1991, Replex Plastics has been led by sole owner Mark Schuetz since 1999 and is known for its specialized work in optical plastics. The American manufacturer uses thermoforming to produce precision components for customers in transportation, lighting and other industries, with ISO 9001:2015-certified operations supporting exports to more than 13 countries.
ISO 9001:2015
certification
HP ManufacturingPrivately owned since its 1939 beginnings as The House of Plastics, Cleveland’s HP Manufacturing has grown into a precision plastics partner for major manufacturers and retailers worldwide. Its more than 110,000-square-foot operation is especially known for the demanding plastic components used in medical imaging, while its acrylic display work reaches retail markets in more than 100 countries. The company holds ISO 9001:2015 certification.CLEVELAND, OH
Superior Plastics, IncFounded in 1997, Superior Plastics is a 100% employee-owned manufacturer based in central Ohio, where its team has grown from a 5,000-square-foot leased site into a 104,000-square-foot production operation. The company is known for custom injection molding for customers in industries such as automotive and medical, with products shipped across several continents. Its quality system is ISO 9001:2015 certified.PLAIN CITY, OH
PlaskoliteFounded by Donald Dunn in Columbus, Ohio, in 1950, Plaskolite has grown from a plastic-sheet maker into a global manufacturer of engineering thermoplastics and customized sheet solutions. The company stands out for pairing large-scale material production with hands-on optical manufacturing, including injection molding, precision coatings, and tooling for distortion-free optics. Plaskolite also emphasizes responsible manufacturing, with site recycling rates ranging from 50% to 80% and a focus on recycled sheet products.LANCASTER, PA
Royal Plastics, IncFounded in 1966, Royal Plastics is a Mentor, Ohio custom manufacturer of injection-molded plastic parts and contract-manufactured components for domestic and international customers. The closely held S-corporation has expanded from its Ohio operation into a U.S.-China manufacturing partnership, with in-house toolmaking, molding, assembly and testing supporting projects from prototype quantities through high-volume production. Royal Plastics employs 250 people domestically and 800 internationally, and operates under ISO 9001:2015 quality registration.MENTOR, OH