The DuPont Textiles and Interiors company has taken its investment in the Wilton nylon site to £250m with the unveiling of a £7m control system.

The modernisation process has put the latest technology hardware and software into its polymer plant.

The modernisation project was completed on time, within budget, without a serious safety-related accident or incident, and had no negative impact on customers.

DuPont acquired the site in 1993 and has taken substantial steps to maintain the viability of the plant.

The company described the latest purchase as a further indication of its confidence and commitment to its Teesside business.

Last year, the DuPont corporation announced the reorganisation of its business units globally and plans eventually to separate the textiles and interiors activities from other DuPont businesses.

The Nylon Intermediates and Polymers business, to which the Wilton plants belong, will form a part of the Textiles and Interiors platform.

DuPont Textiles and Interiors has a global turnover of $6.5bn per year and has almost 20,000 employees throughout the world.

The DuPont Textiles and Interiors plant at Wilton produces nylon chemical intermediates, nylon salt and nylon polymer.