GREEN BAY — Green Bay Packaging on Wednesday announced a multi-year investment to modernize its 59-year-old pulp and containerboard mill about 40 miles northwest of Little Rock, Arkansas. The company in a media release said the “substantial investment” will enhance infrastructure at the Kraft mill in Morrilton, Arkansas and improve the sustainability of Green Bay Packaging’s operations in the state. “To uphold our commitment to innovation and excellence, we recognize the importance of investing in future technology,” said Matt Szymanski, vice president of mill operations. “These investments only happen because of our hard-working and loyal workforce and a supportive community in Morrilton, Arkansas.” …The company, as part of the modernization, plans to purchase another 300 acres of land near the mill to accommodate future expansions.