Operational for more than 40 years, Glopak Corporation Inc. is a producer of polyethylene products. Located in South Plainfield, N.J., the company specializes in manufacturing custom industrial products. In addition, it produces an array of products, such as bags, film, liners and stretch wrap. The company offers services to a number of industries, including agriculture, automotive, citrus, construction, health care as well as food and beverage. Glopak Corporation Inc. also caters to clients in Newark and South Plainfield.