USI Corp. engages in the design, research, development, manufacture, and sales of polyethylene plastic pellets. It operates through the following segments: USI, CGPC and CGPC’s Subsidiaries, TTC and TTC's Subsidiaries, ACME and ACME's Subsidiaries, APC and APC's Subsidiaries, and Others. Its products include low density polyethylene, ethylene vinyl acetate copolymer, high density polyethylene, and linear low density polyethylene resins. Its products are applied in the manufacture of plastics housewares after processing. The company was founded on May 26, 1965 and is headquartered in Kaohsiung, Taiwan.